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Title: Spatio-temporal re-organization of replication foci accompanies replication domain consolidation during human pluripotent stem cell lineage specification.
Creator: Wilson, Korey A, Elefanty, Andrew G, Stanley, Edouard G, Gilbert, David M
Abstract/Description: Lineage specification of both mouse and human pluripotent stem cells (PSCs) is accompanied by spatial consolidation of chromosome domains and temporal consolidation of their replication timing. Replication timing and chromatin organization are both established during G1 phase at the timing decision point (TDP). Here, we have developed live cell imaging tools to track spatio-temporal replication domain consolidation during differentiation. First, we demonstrate that the fluorescence...
Show moreLineage specification of both mouse and human pluripotent stem cells (PSCs) is accompanied by spatial consolidation of chromosome domains and temporal consolidation of their replication timing. Replication timing and chromatin organization are both established during G1 phase at the timing decision point (TDP). Here, we have developed live cell imaging tools to track spatio-temporal replication domain consolidation during differentiation. First, we demonstrate that the fluorescence ubiquitination cell cycle indicator (Fucci) system is incapable of demarcating G1/S or G2/M cell cycle transitions. Instead, we employ a combination of fluorescent PCNA to monitor S phase progression, cytokinesis to demarcate mitosis, and fluorescent nucleotides to label early and late replication foci and track their 3D organization into sub-nuclear chromatin compartments throughout all cell cycle transitions. We find that, as human PSCs differentiate, the length of S phase devoted to replication of spatially clustered replication foci increases, coincident with global compartmentalization of domains into temporally clustered blocks of chromatin. Importantly, re-localization and anchorage of domains was completed prior to the onset of S phase, even in the context of an abbreviated PSC G1 phase. This approach can also be employed to investigate cell fate transitions in single PSCs, which could be seen to differentiate preferentially from G1 phase. Together, our results establish real-time, live-cell imaging methods for tracking cell cycle transitions during human PSC differentiation that can be applied to study chromosome domain consolidation and other aspects of lineage specification.
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Date Issued: 2016-09-16
Identifier: FSU_pmch_27433885, 10.1080/15384101.2016.1203492, PMC5026818, 27433885, 27433885
Format: Citation

Title: High hardness in the biocompatible intermetallic compound β-Ti3Au.
Creator: Svanidze, Eteri, Besara, Tiglet, Ozaydin, M Fevsi, Tiwary, Chandra Sekhar, Wang, Jiakui K, Radhakrishnan, Sruthi, Mani, Sendurai, Xin, Yan, Han, Ke, Liang, Hong, Siegrist, Theo,...
Show moreSvanidze, Eteri, Besara, Tiglet, Ozaydin, M Fevsi, Tiwary, Chandra Sekhar, Wang, Jiakui K, Radhakrishnan, Sruthi, Mani, Sendurai, Xin, Yan, Han, Ke, Liang, Hong, Siegrist, Theo, Ajayan, Pulickel M, Morosan, E
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Abstract/Description: The search for new hard materials is often challenging, but strongly motivated by the vast application potential such materials hold. Ti3Au exhibits high hardness values (about four times those of pure Ti and most steel alloys), reduced coefficient of friction and wear rates, and biocompatibility, all of which are optimal traits for orthopedic, dental, and prosthetic applications. In addition, the ability of this compound to adhere to ceramic parts can reduce both the weight and the cost of...
Show moreThe search for new hard materials is often challenging, but strongly motivated by the vast application potential such materials hold. Ti3Au exhibits high hardness values (about four times those of pure Ti and most steel alloys), reduced coefficient of friction and wear rates, and biocompatibility, all of which are optimal traits for orthopedic, dental, and prosthetic applications. In addition, the ability of this compound to adhere to ceramic parts can reduce both the weight and the cost of medical components. The fourfold increase in the hardness of Ti3Au compared to other Ti-Au alloys and compounds can be attributed to the elevated valence electron density, the reduced bond length, and the pseudogap formation. Understanding the origin of hardness in this intermetallic compound provides an avenue toward designing superior biocompatible, hard materials.
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Date Issued: 2016-07-20
Identifier: FSU_pmch_27453942, 10.1126/sciadv.1600319, PMC4956191, 27453942, 27453942, 1600319
Format: Citation

Title: Deletion of DXZ4 on the human inactive X chromosome alters higher-order genome architecture.
Creator: Darrow, Emily M, Huntley, Miriam H, Dudchenko, Olga, Stamenova, Elena K, Durand, Neva C, Sun, Zhuo, Huang, Su-Chen, Sanborn, Adrian L, Machol, Ido, Shamim, Muhammad, Seberg,...
Show moreDarrow, Emily M, Huntley, Miriam H, Dudchenko, Olga, Stamenova, Elena K, Durand, Neva C, Sun, Zhuo, Huang, Su-Chen, Sanborn, Adrian L, Machol, Ido, Shamim, Muhammad, Seberg, Andrew P, Lander, Eric S, Chadwick, Brian P, Aiden, Erez Lieberman
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Abstract/Description: During interphase, the inactive X chromosome (Xi) is largely transcriptionally silent and adopts an unusual 3D configuration known as the "Barr body." Despite the importance of X chromosome inactivation, little is known about this 3D conformation. We recently showed that in humans the Xi chromosome exhibits three structural features, two of which are not shared by other chromosomes. First, like the chromosomes of many species, Xi forms compartments. Second, Xi is partitioned into two huge...
Show moreDuring interphase, the inactive X chromosome (Xi) is largely transcriptionally silent and adopts an unusual 3D configuration known as the "Barr body." Despite the importance of X chromosome inactivation, little is known about this 3D conformation. We recently showed that in humans the Xi chromosome exhibits three structural features, two of which are not shared by other chromosomes. First, like the chromosomes of many species, Xi forms compartments. Second, Xi is partitioned into two huge intervals, called "superdomains," such that pairs of loci in the same superdomain tend to colocalize. The boundary between the superdomains lies near DXZ4, a macrosatellite repeat whose Xi allele extensively binds the protein CCCTC-binding factor. Third, Xi exhibits extremely large loops, up to 77 megabases long, called "superloops." DXZ4 lies at the anchor of several superloops. Here, we combine 3D mapping, microscopy, and genome editing to study the structure of Xi, focusing on the role of DXZ4 We show that superloops and superdomains are conserved across eutherian mammals. By analyzing ligation events involving three or more loci, we demonstrate that DXZ4 and other superloop anchors tend to colocate simultaneously. Finally, we show that deleting DXZ4 on Xi leads to the disappearance of superdomains and superloops, changes in compartmentalization patterns, and changes in the distribution of chromatin marks. Thus, DXZ4 is essential for proper Xi packaging.
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Date Issued: 2016-08-02
Identifier: FSU_pmch_27432957, 10.1073/pnas.1609643113, PMC4978254, 27432957, 27432957, 1609643113
Format: Citation

Title: Feeling Older and the Development of Cognitive Impairment and Dementia.
Creator: Stephan, Yannick, Sutin, Angelina R, Luchetti, Martina, Terracciano, Antonio
Abstract/Description: Subjective age is a biopsychosocial marker of aging associated with a range of outcomes in old age. In the domain of cognition, feeling older than one's chronological age is related to lower cognitive performance and steeper cognitive decline among older adults. The present study examines whether an older subjective age is associated with the risk of incident cognitive impairment and dementia. Participants were 5,748 individuals aged 65 years and older drawn from the Health and Retirement...
Show moreSubjective age is a biopsychosocial marker of aging associated with a range of outcomes in old age. In the domain of cognition, feeling older than one's chronological age is related to lower cognitive performance and steeper cognitive decline among older adults. The present study examines whether an older subjective age is associated with the risk of incident cognitive impairment and dementia. Participants were 5,748 individuals aged 65 years and older drawn from the Health and Retirement Study. Measures of subjective age, cognition, and covariates were obtained at baseline, and follow-up cognition was assessed over a 2- to 4-year period. Only participants without cognitive impairment were included at baseline. At follow-up, participants were classified into one of the three categories: normal functioning, cognitive impairment without dementia (CIND), and dementia. An older subjective age at baseline was associated with higher likelihood of CIND (odds ratio [OR] = 1.18; 1.09-1.28) and dementia (OR = 1.29; 1.02-1.63) at follow-up, controlling for chronological age, other demographic factors, and baseline cognition. Physical inactivity and depressive symptoms partly accounted for these associations. An older subjective age is a marker of individuals' risk of subsequent cognitive impairment and dementia.
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Date Issued: 2017-10-01
Identifier: FSU_pmch_27436103, 10.1093/geronb/gbw085, PMC5927095, 27436103, 27436103, gbw085
Format: Citation

Title: Multiplexing Fluorescence Anisotropy Using Frequency Encoding.
Creator: Schrell, Adrian M, Mukhitov, Nikita, Roper, Michael G
Abstract/Description: In this report, a method to multiplex fluorescence anisotropy measurements is described using frequency encoding. As a demonstration of the method, simultaneous competitive immunoassays for insulin and glucagon were performed by measuring the ratio of bound and free Cy5-insulin and FITC-glucagon in the presence of their respective antibodies. A vertically polarized 635 nm laser was pulsed at 73 Hz and used to excite Cy5-insulin, while a vertically polarized 488 nm laser pulsed at 137 Hz...
Show moreIn this report, a method to multiplex fluorescence anisotropy measurements is described using frequency encoding. As a demonstration of the method, simultaneous competitive immunoassays for insulin and glucagon were performed by measuring the ratio of bound and free Cy5-insulin and FITC-glucagon in the presence of their respective antibodies. A vertically polarized 635 nm laser was pulsed at 73 Hz and used to excite Cy5-insulin, while a vertically polarized 488 nm laser pulsed at 137 Hz excited FITC-glucagon. The total emission was split into parallel and perpendicular polarizations and collected onto separate photomultiplier tubes. The signals from each channel were demodulated using a fast Fourier transform, resolving the contributions from each fluorophore. Anisotropy calculations were carried out using the magnitude of the peaks in the frequency domain. The method produced the expected shape of the calibration curves with limits of detection of 0.6 and 5 nM for insulin and glucagon, respectively. This methodology could readily be expanded to other biological systems and further multiplexed to monitor increased numbers of analytes.
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Date Issued: 2016-08-16
Identifier: FSU_pmch_27440478, 10.1021/acs.analchem.6b02131, PMC4991543, 27440478, 27440478
Format: Citation

Title: Event generator tunes obtained from underlying event and multiparton scattering measurements.
Creator: Khachatryan, V, Sirunyan, A M, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Friedl, M, Frühwirth, R, Ghete, V M, Hartl, C,...
Show moreKhachatryan, V, Sirunyan, A M, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Friedl, M, Frühwirth, R, Ghete, V M, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, Knünz, V, König, A, Krammer, M, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rahbaran, B, Rohringer, H, Schieck, J, Schöfbeck, R, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, C-E, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, Cornelis, T, De Wolf, E A, Janssen, X, Knutsson, A, Lauwers, J, Luyckx, S, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D'Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Heracleous, N, Keaveney, J, Lowette, S, Moreels, L, Olbrechts, A, Python, Q, Strom, D, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Onsem, G P, Van Parijs, I, Barria, P, Brun, H, Caillol, C, Clerbaux, B, De Lentdecker, G, Fasanella, G, Favart, L, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Maerschalk, T, Marinov, A, Perniè, L, Randle-Conde, A, Seva, T, Vander Velde, C, Yonamine, R, Vanlaer, P, Yonamine, R, Zenoni, F, Zhang, F, Adler, V, Beernaert, K, Benucci, L, Cimmino, A, Crucy, S, Dobur, D, Fagot, A, Garcia, G, Gul, M, Mccartin, J, Ocampo Rios, A A, Poyraz, D, Ryckbosch, D, Salva, S, Sigamani, M, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Basegmez, S, Beluffi, C, Bondu, O, Brochet, S, Bruno, G, Caudron, A, Ceard, L, Da Silveira, G G, Delaere, C, Favart, D, Forthomme, L, Giammanco, A, Hollar, J, Jafari, A, Jez, P, Komm, M, Lemaitre, V, Mertens, A, Musich, M, Nuttens, C, Perrini, L, Pin, A, Piotrzkowski, K, Popov, A, Quertenmont, L, Selvaggi, M, Vidal Marono, M, Beliy, N, Hammad, G H, Júnior, W L Aldá, Alves, F L, Alves, G A, Brito, L, Correa Martins Junior, M, Hamer, M, Hensel, C, Moraes, A, Pol, M E, Rebello Teles, P, Belchior Batista Das Chagas, E, Carvalho, W, Chinellato, J, Custódio, A, Da Costa, E M, De Jesus Damiao, D, De Oliveira Martins, C, Fonseca De Souza, S, Huertas Guativa, L M, Malbouisson, H, Matos Figueiredo, D, Mora Herrera, C, Mundim, L, Nogima, H, Prado Da Silva, W L, Santoro, A, Sznajder, A, Tonelli Manganote, E J, Vilela Pereira, A, Ahuja, S, Bernardes, C A, De Souza Santos, A, Dogra, S, Fernandez Perez Tomei, T R, Gregores, E M, Mercadante, P G, Moon, C S, Novaes, S F, Padula, Sandra S, Romero Abad, D, Ruiz Vargas, J C, Aleksandrov, A, Hadjiiska, R, Iaydjiev, P, Rodozov, M, Stoykova, S, Sultanov, G, Vutova, M, Dimitrov, A, Glushkov, I, Litov, L, Pavlov, B, Petkov, P, Ahmad, M, Bian, J G, Chen, G M, Chen, H S, Chen, M, Cheng, T, Du, R, Jiang, C H, Plestina, R, Romeo, F, Shaheen, S M, Spiezia, A, Tao, J, Wang, C, Wang, Z, Zhang, H, Asawatangtrakuldee, C, Ban, Y, Li, Q, Liu, S, Mao, Y, Qian, S J, Wang, D, Xu, Z, Avila, C, Cabrera, A, Chaparro Sierra, L F, Florez, C, Gomez, J P, Gomez Moreno, B, Sanabria, J C, Godinovic, N, Lelas, D, Puljak, I, Ribeiro Cipriano, P M, Antunovic, Z, Kovac, M, Brigljevic, V, Kadija, K, Luetic, J, Micanovic, S, Sudic, L, Attikis, A, Mavromanolakis, G, Mousa, J, Nicolaou, C, Ptochos, F, Razis, P A, Rykaczewski, H, Bodlak, M, Finger, M, Finger, M, Abdelalim, A A, Awad, A, Mahrous, A, Mohammed, Y, Radi, A, Calpas, B, Kadastik, M, Murumaa, M, Raidal, M, Tiko, A, Veelken, C, Eerola, P, Pekkanen, J, Voutilainen, M, Härkönen, J, Karimäki, V, Kinnunen, R, Lampén, T, Lassila-Perini, K, Lehti, S, Lindén, T, Luukka, P, Mäenpää, T, Peltola, T, Tuominen, E, Tuominiemi, J, Tuovinen, E, Wendland, L, Talvitie, J, Tuuva, T, Besancon, M, Couderc, F, Dejardin, M, Denegri, D, Fabbro, B, Faure, J L, Favaro, C, Ferri, F, Ganjour, S, Givernaud, A, Gras, P, Hamel de Monchenault, G, Jarry, P, Locci, E, Machet, M, Malcles, J, Rander, J, Rosowsky, A, Titov, M, Zghiche, A, Antropov, I, Baffioni, S, Beaudette, F, Busson, P, Cadamuro, L, Chapon, E, Charlot, C, Dahms, T, Davignon, O, Filipovic, N, Granier de Cassagnac, R, Jo, M, Lisniak, S, Mastrolorenzo, L, Miné, P, Naranjo, I N, Nguyen, M, Ochando, C, Ortona, G, Paganini, P, Pigard, P, Regnard, S, Salerno, R, Sauvan, J B, Sirois, Y, Strebler, T, Yilmaz, Y, Zabi, A, Agram, J-L, Andrea, J, Aubin, A, Bloch, D, Brom, J-M, Buttignol, M, Chabert, E C, Chanon, N, Collard, C, Conte, E, Coubez, X, Fontaine, J-C, Gelé, D, Goerlach, U, Goetzmann, C, Le Bihan, A-C, Merlin, J A, Skovpen, K, Van Hove, P, Gadrat, S, Beauceron, S, Bernet, C, Boudoul, G, Bouvier, E, Carrillo Montoya, C A, Chierici, R, Contardo, D, Courbon, B, Depasse, P, El Mamouni, H, Fan, J, Fay, J, Gascon, S, Gouzevitch, M, Ille, B, Lagarde, F, Laktineh, I B, Lethuillier, M, Mirabito, L, Pequegnot, A L, Perries, S, Ruiz Alvarez, J D, Sabes, D, Sgandurra, L, Sordini, V, Vander Donckt, M, Verdier, P, Viret, S, Toriashvili, T, Lomidze, D, Autermann, C, Beranek, S, Edelhoff, M, Feld, L, Heister, A, Kiesel, M K, Klein, K, Lipinski, M, Ostapchuk, A, Preuten, M, Raupach, F, Schael, S, Schulte, J F, Verlage, T, Weber, H, Wittmer, B, Zhukov, V, Ata, M, Brodski, M, Dietz-Laursonn, E, Duchardt, D, Endres, M, Erdmann, M, Erdweg, S, Esch, T, Fischer, R, Güth, A, Hebbeker, T, Heidemann, C, Hoepfner, K, Knutzen, S, Kreuzer, P, Merschmeyer, M, Meyer, A, Millet, P, Olschewski, M, Padeken, K, Papacz, P, Pook, T, Radziej, M, Reithler, H, Rieger, M, Scheuch, F, Sonnenschein, L, Teyssier, D, Thüer, S, Cherepanov, V, Erdogan, Y, Flügge, G, Geenen, H, Geisler, M, Hoehle, F, Kargoll, B, Kress, T, Kuessel, Y, Künsken, A, Lingemann, J, Nehrkorn, A, Nowack, A, Nugent, I M, Pistone, C, Pooth, O, Stahl, A, Aldaya Martin, M, Asin, I, Bartosik, N, Behnke, O, Behrens, U, Bell, A J, Borras, K, Burgmeier, A, Campbell, A, Choudhury, S, Costanza, F, Diez Pardos, C, Dolinska, G, Dooling, S, Dorland, T, Eckerlin, G, Eckstein, D, Eichhorn, T, Flucke, G, Gallo, E, Garcia, J Garay, Geiser, A, Gizhko, A, Gunnellini, P, Hauk, J, Hempel, M, Jung, H, Kalogeropoulos, A, Karacheban, O, Kasemann, M, Katsas, P, Kieseler, J, Kleinwort, C, Korol, I, Lange, W, Leonard, J, Lipka, K, Lobanov, A, Lohmann, W, Mankel, R, Marfin, I, Melzer-Pellmann, I-A, Meyer, A B, Mittag, G, Mnich, J, Mussgiller, A, Naumann-Emme, S, Nayak, A, Ntomari, E, Perrey, H, Pitzl, D, Placakyte, R, Raspereza, A, Roland, B, Sahin, M Ö, Saxena, P, Schoerner-Sadenius, T, Schröder, M, Seitz, C, Spannagel, S, Trippkewitz, K D, Walsh, R, Wissing, C, Blobel, V, Centis Vignali, M, Draeger, A R, Erfle, J, Garutti, E, Goebel, K, Gonzalez, D, Görner, M, Haller, J, Hoffmann, M, Höing, R S, Junkes, A, Klanner, R, Kogler, R, Kovalchuk, N, Lapsien, T, Lenz, T, Marchesini, I, Marconi, D, Meyer, M, Nowatschin, D, Ott, J, Pantaleo, F, Peiffer, T, Perieanu, A, Pietsch, N, Poehlsen, J, Rathjens, D, Sander, C, Scharf, C, Schettler, H, Schleper, P, Schlieckau, E, Schmidt, A, Schwandt, J, Sola, V, Stadie, H, Steinbrück, G, Tholen, H, Troendle, D, Usai, E, Vanelderen, L, Vanhoefer, A, Vormwald, B, Barth, C, Baus, C, Berger, J, Böser, C, Butz, E, Chwalek, T, Colombo, F, De Boer, W, Descroix, A, Dierlamm, A, Fink, S, Frensch, F, Friese, R, Giffels, M, Gilbert, A, Haitz, D, Hartmann, F, Heindl, S M, Husemann, U, Katkov, I, Kornmayer, A, Lobelle Pardo, P, Maier, B, Mildner, H, Mozer, M U, Müller, T, Müller, Th, Plagge, M, Quast, G, Rabbertz, K, Röcker, S, Roscher, F, Sieber, G, Simonis, H J, Stober, F M, Ulrich, R, Wagner-Kuhr, J, Wayand, S, Weber, M, Weiler, T, Williamson, S, Wöhrmann, C, Wolf, R, Anagnostou, G, Daskalakis, G, Geralis, T, Giakoumopoulou, V A, Kyriakis, A, Loukas, D, Psallidas, A, Topsis-Giotis, I, Agapitos, A, Kesisoglou, S, Panagiotou, A, Saoulidou, N, Tziaferi, E, Evangelou, I, Flouris, G, Foudas, C, Kokkas, P, Loukas, N, Manthos, N, Papadopoulos, I, Paradas, E, Strologas, J, Bencze, G, Hajdu, C, Hazi, A, Hidas, P, Horvath, D, Sikler, F, Veszpremi, V, Vesztergombi, G, Zsigmond, A J, Beni, N, Czellar, S, Karancsi, J, Molnar, J, Szillasi, Z, Bartók, M, Makovec, A, Raics, P, Trocsanyi, Z L, Ujvari, B, Mal, P, Mandal, K, Sahoo, D K, Sahoo, N, Swain, S K, Bansal, S, Beri, S B, Bhatnagar, V, Chawla, R, Gupta, R, Bhawandeep, U, Kalsi, A K, Kaur, A, Kaur, M, Kumar, R, Mehta, A, Mittal, M, Singh, J B, Walia, G, Kumar, Ashok, Bhardwaj, A, Choudhary, B C, Garg, R B, Kumar, A, Malhotra, S, Naimuddin, M, Nishu, N, Ranjan, K, Sharma, R, Sharma, V, Bhattacharya, S, Chatterjee, K, Dey, S, Dutta, S, Jain, Sa, Majumdar, N, Modak, A, Mondal, K, Mukherjee, S, Mukhopadhyay, S, Roy, A, Roy, D, Roy Chowdhury, S, Sarkar, S, Sharan, M, Abdulsalam, A, Chudasama, R, Dutta, D, Jha, V, Kumar, V, Mohanty, A K, Pant, L M, Shukla, P, Topkar, A, Aziz, T, Banerjee, S, Bhowmik, S, Chatterjee, R M, Dewanjee, R K, Dugad, S, Ganguly, S, Ghosh, S, Guchait, M, Gurtu, A, Kole, G, Kumar, S, Mahakud, B, Maity, M, Majumder, G, Mazumdar, K, Mitra, S, Mohanty, G B, Parida, B, Sarkar, T, Sur, N, Sutar, B, Wickramage, N, Chauhan, S, Dube, S, Kapoor, A, Kothekar, K, Sharma, S, Bakhshiansohi, H, Behnamian, H, Etesami, S M, Fahim, A, Goldouzian, R, Khakzad, M, Mohammadi Najafabadi, M, Naseri, M, Paktinat Mehdiabadi, S, Rezaei Hosseinabadi, F, Safarzadeh, B, Zeinali, M, Felcini, M, Grunewald, M, Abbrescia, M, Calabria, C, Caputo, C, Colaleo, A, Creanza, D, Cristella, L, De Filippis, N, De Palma, M, Fiore, L, Iaselli, G, Maggi, G, Miniello, G, Maggi, M, My, S, Nuzzo, S, Pompili, A, Pugliese, G, Radogna, R, Ranieri, A, Selvaggi, G, Silvestris, L, Venditti, R, Verwilligen, P, Abbiendi, G, Battilana, C, Benvenuti, A C, Bonacorsi, D, Braibant-Giacomelli, S, Brigliadori, L, Campanini, R, Capiluppi, P, Castro, A, Cavallo, F R, Chhibra, S S, Codispoti, G, Cuffiani, M, Dallavalle, G M, Fabbri, F, Fanfani, A, Fasanella, D, Giacomelli, P, Grandi, C, Guiducci, L, Marcellini, S, Masetti, G, Montanari, A, Navarria, F L, Perrotta, A, Rossi, A M, Primavera, F, Rovelli, T, Siroli, G P, Tosi, N, Travaglini, R, Cappello, G, Chiorboli, M, Costa, S, Mattia, A Di, Giordano, F, Potenza, R, Tricomi, A, Tuve, C, Barbagli, G, Ciulli, V, Civinini, C, D'Alessandro, R, Focardi, E, Gonzi, S, 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Mermerkaya, H, Mestvirishvili, A, Moeller, A, Nachtman, J, Ogul, H, Onel, Y, Ozok, F, Penzo, A, Snyder, C, Tiras, E, Wetzel, J, Yi, K, Anderson, I, Anderson, I, Barnett, B A, Blumenfeld, B, Eminizer, N, Fehling, D, Feng, L, Gritsan, A V, Maksimovic, P, Martin, C, Osherson, M, Roskes, J, Sady, A, Sarica, U, Swartz, M, Xiao, M, Xin, Y, You, C, Xiao, M, Baringer, P, Bean, A, Benelli, G, Bruner, C, Kenny, R P, Majumder, D, Majumder, D, Malek, M, Murray, M, Sanders, S, Stringer, R, Wang, Q, Ivanov, A, Kaadze, K, Khalil, S, Makouski, M, Maravin, Y, Mohammadi, A, Saini, L K, Skhirtladze, N, Toda, S, Lange, D, Rebassoo, F, Wright, D, Anelli, C, Baden, A, Baron, O, Belloni, A, Calvert, B, Eno, S C, Ferraioli, C, Gomez, J A, Hadley, N J, Jabeen, S, Jabeen, S, Kellogg, R G, Kolberg, T, Kunkle, J, Lu, Y, Mignerey, A C, Shin, Y H, Skuja, A, Tonjes, M B, Tonwar, S C, Apyan, A, Barbieri, R, Baty, A, Bierwagen, K, Brandt, S, Bierwagen, K, Busza, W, Cali, I A, Demiragli, Z, Di Matteo, L, Gomez Ceballos, G, Goncharov, M, Gulhan, D, Iiyama, Y, Innocenti, G M, Klute, M, Kovalskyi, D, Lai, Y S, Lee, Y-J, Levin, A, Luckey, P D, Marini, A C, Mcginn, C, Mironov, C, Narayanan, S, Niu, X, Paus, C, Ralph, D, Roland, C, Roland, G, Salfeld-Nebgen, J, Stephans, G S F, Sumorok, K, Varma, M, Velicanu, D, Veverka, J, Wang, J, Wang, T W, Wyslouch, B, Yang, M, Zhukova, V, Dahmes, B, Evans, A, Finkel, A, Gude, A, Hansen, P, Kalafut, S, Kao, S C, Klapoetke, K, Kubota, Y, Lesko, Z, Mans, J, Nourbakhsh, S, Ruckstuhl, N, Rusack, R, Tambe, N, Turkewitz, J, Acosta, J G, Oliveros, S, Avdeeva, E, Bloom, K, Bose, S, Claes, D R, Dominguez, A, Fangmeier, C, Gonzalez Suarez, R, Kamalieddin, R, Keller, J, Knowlton, D, Kravchenko, I, Meier, F, Monroy, J, Ratnikov, F, Siado, J E, Snow, G R, Alyari, M, Dolen, J, George, J, Godshalk, A, Harrington, C, Iashvili, I, Kaisen, J, Kharchilava, A, Kumar, A, Rappoccio, S, Roozbahani, B, Alverson, G, Barberis, E, Baumgartel, D, Chasco, M, Hortiangtham, A, Massironi, A, Morse, D M, Nash, D, Orimoto, T, Teixeira De Lima, R, Trocino, D, Wang, R-J, Wood, D, Zhang, J, Hahn, K A, Kubik, A, Mucia, N, Odell, N, Pollack, B, Pozdnyakov, A, Schmitt, M, Stoynev, S, Sung, K, Trovato, M, Velasco, M, Brinkerhoff, A, Dev, N, Hildreth, M, Jessop, C, Karmgard, D J, Kellams, N, Lannon, K, Marinelli, N, Meng, F, Mueller, C, Musienko, Y, Planer, M, Reinsvold, A, Ruchti, R, Smith, G, Taroni, S, Valls, N, Wayne, M, Wolf, M, Woodard, A, Antonelli, L, Brinson, J, Bylsma, B, Durkin, L S, Flowers, S, Hart, A, Hill, C, Hughes, R, Ji, W, Ling, T Y, Liu, B, Luo, W, Puigh, D, Rodenburg, M, Winer, B L, Wulsin, H W, Driga, O, Elmer, P, Hardenbrook, J, Hebda, P, Koay, S A, Lujan, P, Marlow, D, Medvedeva, T, Mooney, M, Olsen, J, Palmer, C, Piroué, P, Saka, H, Stickland, D, Tully, C, Zuranski, A, Malik, S, Barnes, V E, Benedetti, D, Bortoletto, D, Gutay, L, Jha, M K, Jones, M, Jung, K, Miller, D H, Neumeister, N, Primavera, F, Radburn-Smith, B C, Shi, X, Shipsey, I, Silvers, D, Sun, J, Svyatkovskiy, A, Wang, F, Xie, W, Xu, L, Parashar, N, Stupak, J, Adair, A, Akgun, B, Chen, Z, Ecklund, K M, Geurts, F J M, Guilbaud, M, Li, W, Michlin, B, Northup, M, Padley, B P, Redjimi, R, Roberts, J, Rorie, J, Tu, Z, Zabel, J, Betchart, B, Bodek, A, de Barbaro, P, Demina, R, Eshaq, Y, Ferbel, T, Galanti, M, Galanti, M, Garcia-Bellido, A, Han, J, Harel, A, Hindrichs, O, Hindrichs, O, Khukhunaishvili, A, Petrillo, G, Tan, P, Verzetti, M, Arora, S, Barker, A, Chou, J P, Contreras-Campana, C, Contreras-Campana, E, Ferencek, D, Gershtein, Y, Gray, R, Halkiadakis, E, Hidas, D, Hughes, E, Kaplan, S, Kunnawalkam Elayavalli, R, Lath, A, Nash, K, Panwalkar, S, Park, M, Salur, S, Schnetzer, S, Sheffield, D, Somalwar, S, Stone, R, Thomas, S, Thomassen, P, Walker, M, Foerster, M, Riley, G, Rose, K, Spanier, S, York, A, Bouhali, O, Castaneda Hernandez, A, Celik, A, Dalchenko, M, De Mattia, M, Delgado, A, Dildick, S, Dildick, S, Eusebi, R, Gilmore, J, Huang, T, Kamon, T, Krutelyov, V, Krutelyov, V, Mueller, R, Osipenkov, I, Pakhotin, Y, Patel, R, Patel, R, Perloff, A, Rose, A, Safonov, A, Tatarinov, A, Ulmer, K A, Akchurin, N, Cowden, C, Damgov, J, Dragoiu, C, Dudero, P R, Faulkner, J, Kunori, S, Lamichhane, K, Lee, S W, Libeiro, T, Undleeb, S, Volobouev, I, Appelt, E, Delannoy, A G, Greene, S, Gurrola, A, Janjam, R, Johns, W, Maguire, C, Mao, Y, Melo, A, Ni, H, Sheldon, P, Snook, B, Tuo, S, Velkovska, J, Xu, Q, Arenton, M W, Cox, B, Francis, B, Goodell, J, Hirosky, R, Ledovskoy, A, Li, H, Lin, C, Neu, C, Sinthuprasith, T, Sun, X, Wang, Y, Wolfe, E, Wood, J, Xia, F, Clarke, C, Harr, R, Karchin, P E, Kottachchi Kankanamge Don, C, Lamichhane, P, Sturdy, J, Belknap, D A, Carlsmith, D, Cepeda, M, Dasu, S, Dodd, L, Duric, S, Gomber, B, Grothe, M, Hall-Wilton, R, Herndon, M, Hervé, A, Klabbers, P, Lanaro, A, Levine, A, Long, K, Loveless, R, Mohapatra, A, Ojalvo, I, Perry, T, Pierro, G A, Polese, G, Ruggles, T, Sarangi, T, Savin, A, Sharma, A, Smith, N, Smith, W H, Taylor, D, Woods, N
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Abstract/Description: New sets of parameters ("tunes") for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton-proton ([Formula: see text]) data at [Formula: see text] and to UE proton-antiproton ([Formula: see text]) data from the CDF experiment at lower [Formula: see text], are used to study the UE models and constrain their parameters, providing thereby improved...
Show moreNew sets of parameters ("tunes") for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton-proton ([Formula: see text]) data at [Formula: see text] and to UE proton-antiproton ([Formula: see text]) data from the CDF experiment at lower [Formula: see text], are used to study the UE models and constrain their parameters, providing thereby improved predictions for proton-proton collisions at 13[Formula: see text]. In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. Finally, comparisons are presented of the UE tunes to "minimum bias" (MB) events, multijet, and Drell-Yan ([Formula: see text] lepton-antilepton+jets) observables at 7 and 8[Formula: see text], as well as predictions for MB and UE observables at 13[Formula: see text].
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Date Issued: 2016-01-01
Identifier: FSU_pmch_27471433, 10.1140/epjc/s10052-016-3988-x, PMC4946872, 27471433, 27471433, 3988
Format: Citation

Title: Proteomic Upregulation of Fatty Acid Synthase and Fatty Acid Binding Protein 5 and Identification of Cancer- and Race-Specific Pathway Associations in Human Prostate Cancer Tissues.
Creator: Myers, Jennifer S, von Lersner, Ariana K, Sang, Qing-Xiang Amy
Abstract/Description: Protein profiling studies of prostate cancer have been widely used to characterize molecular differences between diseased and non-diseased tissues. When combined with pathway analysis, profiling approaches are able to identify molecular mechanisms of prostate cancer, group patients by cancer subtype, and predict prognosis. This strategy can also be implemented to study prostate cancer in very specific populations, such as African Americans who have higher rates of prostate cancer incidence...
Show moreProtein profiling studies of prostate cancer have been widely used to characterize molecular differences between diseased and non-diseased tissues. When combined with pathway analysis, profiling approaches are able to identify molecular mechanisms of prostate cancer, group patients by cancer subtype, and predict prognosis. This strategy can also be implemented to study prostate cancer in very specific populations, such as African Americans who have higher rates of prostate cancer incidence and mortality than other racial groups in the United States. In this study, age-, stage-, and Gleason score-matched prostate tumor specimen from African American and Caucasian American men, along with non-malignant adjacent prostate tissue from these same patients, were compared. Protein expression changes and altered pathway associations were identified in prostate cancer generally and in African American prostate cancer specifically. In comparing tumor to non-malignant samples, 45 proteins were significantly cancer-associated and 3 proteins were significantly downregulated in tumor samples. Notably, fatty acid synthase (FASN) and epidermal fatty acid-binding protein (FABP5) were upregulated in human prostate cancer tissues, consistent with their known functions in prostate cancer progression. Aldehyde dehydrogenase family 1 member A3 (ALDH1A3) was also upregulated in tumor samples. The Metastasis Associated Protein 3 (MTA3) pathway was significantly enriched in tumor samples compared to non-malignant samples. While the current experiment was unable to detect statistically significant differences in protein expression between African American and Caucasian American samples, differences in overrepresentation and pathway enrichment were found. Structural components (Cytoskeletal Proteins and Extracellular Matrix Protein protein classes, and Biological Adhesion Gene Ontology (GO) annotation) were overrepresented in African American but not Caucasian American tumors. Additionally, 5 pathways were enriched in African American prostate tumors: the Small Cell Lung Cancer, Platelet-Amyloid Precursor Protein, Agrin, Neuroactive Ligand-Receptor Interaction, and Intrinsic pathways. The protein components of these pathways were either basement membrane proteins or coagulation proteins.
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Date Issued: 2016-07-05
Identifier: FSU_pmch_27471561, 10.7150/jca.15860, PMC4964129, 27471561, 27471561, jcav07p1452
Format: Citation

Title: Wavy membranes and the growth rate of a planar chemical garden: Enhanced diffusion and bioenergetics..
Creator: Ding, Yang, Batista, Bruno, Steinbock, Oliver, Cartwright, Julyan H E, Cardoso, Silvana S S
Abstract/Description: To model ion transport across protocell membranes in Hadean hydrothermal vents, we consider both theoretically and experimentally the planar growth of a precipitate membrane formed at the interface between two parallel fluid streams in a 2D microfluidic reactor. The growth rate of the precipitate is found to be proportional to the square root of time, which is characteristic of diffusive transport. However, the dependence of the growth rate on the concentrations of hydroxide and metal ions is...
Show moreTo model ion transport across protocell membranes in Hadean hydrothermal vents, we consider both theoretically and experimentally the planar growth of a precipitate membrane formed at the interface between two parallel fluid streams in a 2D microfluidic reactor. The growth rate of the precipitate is found to be proportional to the square root of time, which is characteristic of diffusive transport. However, the dependence of the growth rate on the concentrations of hydroxide and metal ions is approximately linear and quadratic, respectively. We show that such a difference in ionic transport dynamics arises from the enhanced transport of metal ions across a thin gel layer present at the surface of the precipitate. The fluctuations in transverse velocity in this wavy porous gel layer allow an enhanced transport of the cation, so that the effective diffusivity is about one order of magnitude higher than that expected from molecular diffusion alone. Our theoretical predictions are in excellent agreement with our laboratory measurements of the growth of a manganese hydroxide membrane in a microfluidic channel, and this enhanced transport is thought to have been needed to account for the bioenergetics of the first single-celled organisms.
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Date Issued: 2016-08-16
Identifier: FSU_pmch_27486248, 10.1073/pnas.1607828113, PMC4995959, 27486248, 27486248, 1607828113
Format: Citation

Title: Influence of Repressive Histone and DNA Methylation upon D4Z4 Transcription in Non-Myogenic Cells.
Creator: Das, Sunny, Chadwick, Brian P
Abstract/Description: We looked at a disease-associated macrosatellite array D4Z4 and focused on epigenetic factors influencing its chromatin state outside of the disease-context. We used the HCT116 cell line that contains the non-canonical polyadenylation (poly-A) signal required to stabilize somatic transcripts of the human double homeobox gene DUX4, encoded from D4Z4. In HCT116, D4Z4 is packaged into constitutive heterochromatin, characterized by DNA methylation and histone H3 tri-methylation at lysine 9 ...
Show moreWe looked at a disease-associated macrosatellite array D4Z4 and focused on epigenetic factors influencing its chromatin state outside of the disease-context. We used the HCT116 cell line that contains the non-canonical polyadenylation (poly-A) signal required to stabilize somatic transcripts of the human double homeobox gene DUX4, encoded from D4Z4. In HCT116, D4Z4 is packaged into constitutive heterochromatin, characterized by DNA methylation and histone H3 tri-methylation at lysine 9 (H3K9me3), resulting in low basal levels of D4Z4-derived transcripts. However, a double knockout (DKO) of DNA methyltransferase genes, DNMT1 and DNMT3B, but not either alone, results in significant loss of DNA and H3K9 methylation. This is coupled with upregulation of transcript levels from the array, including DUX4 isoforms (DUX4-fl) that are abnormally expressed in somatic muscle in the disease Facioscapulohumeral muscular dystrophy (FSHD) along with DUX4 protein, as indicated indirectly by upregulation of bondafide targets of DUX4 in DKO but not HCT116 cells. Results from treatment with a chemical inhibitor of histone methylation in HCT116 suggest that in the absence of DNA hypomethylation, H3K9me3 loss alone is sufficient to facilitate DUX4-fl transcription. Additionally, characterization of a cell line from a patient with Immunodeficiency, Centromeric instability and Facial anomalies syndrome 1 (ICF1) possessing a non-canonical poly-A signal and DNA hypomethylation at D4Z4 showed DUX4 target gene upregulation in the patient when compared to controls in spite of retention of H3K9me3. Taken together, these data suggest that both DNA methylation and H3K9me3 are determinants of D4Z4 silencing. Moreover, we show that in addition to testis, there is appreciable expression of spliced and polyadenylated D4Z4 derived transcripts that contain the complete DUX4 open reading frame (ORF) along with DUX4 target gene expression in the thymus, suggesting that DUX4 may provide normal function in this somatic tissue.
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Date Issued: 2016-07-28
Identifier: FSU_pmch_27467759, 10.1371/journal.pone.0160022, PMC4965136, 27467759, 27467759, PONE-D-15-54558
Format: Citation

Title: An investigation of the association of genetic susceptibility risk with somatic mutation burden in breast cancer.
Creator: Zhu, Bin, Mukherjee, Anwesha, Machiela, Mitchell J, Song, Lei, Hua, Xing, Shi, Jianxin, Garcia-Closas, Montserrat, Chanock, Stephen J, Chatterjee, Nilanjan
Abstract/Description: Genome-wide association studies have reported nearly 100 common germline susceptibility loci associated with the risk for breast cancer. Tumour sequencing studies have characterised somatic mutation profiles in breast cancer patients. The relationship between breast cancer susceptibility loci and somatic mutation patterns in breast cancer remains largely unexplored. We used single-nucleotide polymorphism (SNP) genotyping array data and tumour exome sequencing data available from 638 breast...
Show moreGenome-wide association studies have reported nearly 100 common germline susceptibility loci associated with the risk for breast cancer. Tumour sequencing studies have characterised somatic mutation profiles in breast cancer patients. The relationship between breast cancer susceptibility loci and somatic mutation patterns in breast cancer remains largely unexplored. We used single-nucleotide polymorphism (SNP) genotyping array data and tumour exome sequencing data available from 638 breast cancer patients of European ancestry from The Cancer Genome Atlas (TCGA) project. We analysed both genotype data and, when necessary, imputed genotypes for 90 known breast cancer susceptibility loci. We performed linear regression models to investigate possible associations between germline risk variants with total somatic mutation count (TSMC), as well as specific mutation types. We examined individual SNP genotypes, as well as a multi-SNP polygenic risk score (PRS). Models were statistically adjusted for age at diagnosis, stage, oestrogen-receptor (ER) and progesterone-receptor (PR) status of breast cancer. We also performed stratified analyses by ER and PR status. We observed a significant inverse association (P=8.75 × 10(-6); FDR=0.001) between the risk allele in rs2588809 of the gene RAD51B and TSMC across all breast cancer patients, for both ER(+) and ER(-) tumours. This association was also evident for different types of mutations. The PRS analysis for all patients, with or without rs2588809, showed a significant inverse association (P=0.01 and 0.04, respectively) with TSMC. This inverse association was significant in ER(+) patients with the ER(+)-specific PRS (P=0.02), but not among ER(-) patients for the ER(-)-specific PRS (P=0.39). We observed an inverse association between common germline risk variants and TSMC, which, if confirmed, could provide new insights into how germline variation informs our understanding of somatic mutation patterns in breast cancer.
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Date Issued: 2016-09-06
Identifier: FSU_pmch_27467053, 10.1038/bjc.2016.223, PMC5023771, 27467053, 27467053, bjc2016223
Format: Citation

Title: Mississippi River Plume Enriches Microbial Diversity in the Northern Gulf of Mexico.
Creator: Mason, Olivia U, Canter, Erin J, Gillies, Lauren E, Paisie, Taylor K, Roberts, Brian J
Abstract/Description: The Mississippi River (MR) serves as the primary source of freshwater and nutrients to the northern Gulf of Mexico (nGOM). Whether this input of freshwater also enriches microbial diversity as the MR plume migrates and mixes with the nGOM serves as the central question addressed herein. Specifically, in this study physicochemical properties and planktonic microbial community composition and diversity was determined using iTag sequencing of 16S rRNA genes in 23 samples collected along a...
Show moreThe Mississippi River (MR) serves as the primary source of freshwater and nutrients to the northern Gulf of Mexico (nGOM). Whether this input of freshwater also enriches microbial diversity as the MR plume migrates and mixes with the nGOM serves as the central question addressed herein. Specifically, in this study physicochemical properties and planktonic microbial community composition and diversity was determined using iTag sequencing of 16S rRNA genes in 23 samples collected along a salinity (and nutrient) gradient from the mouth of the MR, in the MR plume, in the canyon, at the Deepwater Horizon wellhead and out to the loop current. Analysis of these datasets revealed that the MR influenced microbial diversity as far offshore as the Deepwater Horizon wellhead. The MR had the highest microbial diversity, which decreased with increasing salinity. MR bacterioplankton communities were distinct compared to the nGOM, particularly in the surface where Actinobacteria and Proteobacteria dominated, while the deeper MR was also enriched in Thaumarchaeota. Statistical analyses revealed that nutrients input by the MR, along with salinity and depth, were the primary drivers in structuring the microbial communities. These results suggested that the reduced salinity, nutrient enriched MR plume could act as a seed bank for microbial diversity as it mixes with the nGOM. Whether introduced microorganisms are active at higher salinities than freshwater would determine if this seed bank for microbial diversity is ecologically significant. Alternatively, microorganisms that are physiologically restricted to freshwater habitats that are entrained in the plume could be used as tracers for freshwater input to the marine environment.
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Date Issued: 2016-07-07
Identifier: FSU_pmch_27458442, 10.3389/fmicb.2016.01048, PMC4936242, 27458442, 27458442
Format: Citation

Title: Nearly massless Dirac fermions hosted by Sb square net in BaMnSb2.
Creator: Liu, Jinyu, Hu, Jin, Cao, Huibo, Zhu, Yanglin, Chuang, Alyssa, Graf, D, Adams, D J, Radmanesh, S M A, Spinu, L, Chiorescu, I, Mao, Zhiqiang
Abstract/Description: Layered compounds AMnBi2 (A = Ca, Sr, Ba, or rare earth element) have been established as Dirac materials. Dirac electrons generated by the two-dimensional (2D) Bi square net in these materials are normally massive due to the presence of a spin-orbital coupling (SOC) induced gap at Dirac nodes. Here we report that the Sb square net in an isostructural compound BaMnSb2 can host nearly massless Dirac fermions. We observed strong Shubnikov-de Haas (SdH) oscillations in this material. From the...
Show moreLayered compounds AMnBi2 (A = Ca, Sr, Ba, or rare earth element) have been established as Dirac materials. Dirac electrons generated by the two-dimensional (2D) Bi square net in these materials are normally massive due to the presence of a spin-orbital coupling (SOC) induced gap at Dirac nodes. Here we report that the Sb square net in an isostructural compound BaMnSb2 can host nearly massless Dirac fermions. We observed strong Shubnikov-de Haas (SdH) oscillations in this material. From the analyses of the SdH oscillations, we find key signatures of Dirac fermions, including light effective mass (~0.052m0; m0, mass of free electron), high quantum mobility (1280 cm(2)V(-1)S(-1)) and a π Berry phase accumulated along cyclotron orbit. Compared with AMnBi2, BaMnSb2 also exhibits much more significant quasi two-dimensional (2D) electronic structure, with the out-of-plane transport showing nonmetallic conduction below 120 K and the ratio of the out-of-plane and in-plane resistivity reaching ~670. Additionally, BaMnSb2 also exhibits a G-type antiferromagnetic order below 283 K. The combination of nearly massless Dirac fermions on quasi-2D planes with a magnetic order makes BaMnSb2 an intriguing platform for seeking novel exotic phenomena of massless Dirac electrons.
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Date Issued: 2016-07-28
Identifier: FSU_pmch_27466151, 10.1038/srep30525, PMC4964361, 27466151, 27466151, srep30525
Format: Citation

Title: Local Optima in Mixture Modeling.
Creator: Shireman, Emilie M, Steinley, Douglas, Brusco, Michael J
Abstract/Description: It is common knowledge that mixture models are prone to arrive at locally optimal solutions. Typically, researchers are directed to utilize several random initializations to ensure that the resulting solution is adequate. However, it is unknown what factors contribute to a large number of local optima and whether these coincide with the factors that reduce the accuracy of a mixture model. A real-data illustration and a series of simulations are presented that examine the effect of a variety...
Show moreIt is common knowledge that mixture models are prone to arrive at locally optimal solutions. Typically, researchers are directed to utilize several random initializations to ensure that the resulting solution is adequate. However, it is unknown what factors contribute to a large number of local optima and whether these coincide with the factors that reduce the accuracy of a mixture model. A real-data illustration and a series of simulations are presented that examine the effect of a variety of data structures on the propensity of local optima and the classification quality of the resulting solution. We show that there is a moderately strong relationship between a solution that has a high proportion of local optima and one that is poorly classified.
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Date Issued: 2016-07-01
Identifier: FSU_pmch_27494191, 10.1080/00273171.2016.1160359, PMC5534344, 27494191, 27494191
Format: Citation

Title: Does Exercise Improve Cognitive Performance? A Conservative Message from Lord's Paradox.
Creator: Liu, Sicong, Lebeau, Jean-Charles, Tenenbaum, Gershon
Abstract/Description: Although extant meta-analyses support the notion that exercise results in cognitive performance enhancement, methodology shortcomings are noted among primary evidence. The present study examined relevant randomized controlled trials (RCTs) published in the past 20 years (1996-2015) for methodological concerns arise from Lord's paradox. Our analysis revealed that RCTs supporting the positive effect of exercise on cognition are likely to include Type I Error(s). This result can be attributed to...
Show moreAlthough extant meta-analyses support the notion that exercise results in cognitive performance enhancement, methodology shortcomings are noted among primary evidence. The present study examined relevant randomized controlled trials (RCTs) published in the past 20 years (1996-2015) for methodological concerns arise from Lord's paradox. Our analysis revealed that RCTs supporting the positive effect of exercise on cognition are likely to include Type I Error(s). This result can be attributed to the use of gain score analysis on pretest-posttest data as well as the presence of control group superiority over the exercise group on baseline cognitive measures. To improve accuracy of causal inferences in this area, analysis of covariance on pretest-posttest data is recommended under the assumption of group equivalence. Important experimental procedures are discussed to maintain group equivalence.
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Date Issued: 2016-07-21
Identifier: FSU_pmch_27493637, 10.3389/fpsyg.2016.01092, PMC4954852, 27493637, 27493637
Format: Citation

Title: Emergency total proctocolectomy in an uninsured patient with Familial Adenomatous Polyposis Syndrome and acute lower gastrointestinal hemorrhage in a community hospital: A case report..
Creator: Oviedo, Rodolfo J, Dixon, Bruce M, Sofiak, Chase W
Abstract/Description: Rectal bleeding is the most common symptom of Familial Adenomatous Polyposis (FAP). This case investigates the efficacy of emergency surgery for FAP with total proctocolectomy end ileostomy for recurrent lower gastrointestinal (GI) hemorrhage in an uninsured patient in a 266-bed community hospital. The optimal treatment for FAP with acute lower GI hemorrhage and hemodynamic compromise unresponsive to conservative management is unclear. A 41-year-old uninsured African American man with no past...
Show moreRectal bleeding is the most common symptom of Familial Adenomatous Polyposis (FAP). This case investigates the efficacy of emergency surgery for FAP with total proctocolectomy end ileostomy for recurrent lower gastrointestinal (GI) hemorrhage in an uninsured patient in a 266-bed community hospital. The optimal treatment for FAP with acute lower GI hemorrhage and hemodynamic compromise unresponsive to conservative management is unclear. A 41-year-old uninsured African American man with no past medical or family history presented to the emergency department with hematochezia lasting three days. A clinical diagnosis of FAP made on colonoscopy with biopsies revealed villous and tubulovillous adenomas without dysplasia. After blood products resuscitation, an emergency total proctocolectomy with end ileostomy was performed. A staged ileal J pouch to anal anastomosis and creation of protective loop ileostomy was performed months later after securing state funding. A final loop ileostomy reversal occurred six weeks later. His self reported quality of life is improved. Lower GI hemorrhage from FAP unresponsive to blood products may require emergency total proctocolectomy and end ileostomy with a staged ileal J pouch to anal anastomosis, which can be done in a community acute care hospital for an uninsured patient. A total proctocolectomy is feasible in the emergency setting in an uninsured patient with lower GI bleeding and FAP. A staged ileal J pouch-anal anastomosis is easier to justify to the hospital compared to a staged completion colectomy with proctectomy. It is essential to monitor the ileo-anal anastomosis with anoscopy.
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Date Issued: 2016-01-01
Identifier: FSU_pmch_27497040, 10.1016/j.ijscr.2016.07.052, PMC4976607, 27497040, 27497040, S2210-2612(16)30290-5
Format: Citation

Title: Synthesis of "neoprofen", a rigidified analogue of ibuprofen, exemplifying synthetic methodology for altering the 3-D topology of pharmaceutical substances.
Creator: Ramsubhag, Ron R, Massaro, Chelsea L, Dadich, Christina M, Janeczek, Andrew J, Hoang, Tung T, Mazzio, Elizabeth A, Eyunni, Suresh, Soliman, Karam F A, Dudley, Gregory B
Abstract/Description: 3,3-Dimethylcyclopentanes (neopentylenes) are ubiquitous in Nature but largely absent from synthetic pharmaceutical libraries. Neopentylenes define a hydrophobic and rigid 3-D topology with distinct molecular pharmacology, as exemplified here with two neopentylene-fused analogues of the synthetic anti-inflammatory drug, ibuprofen.
Date Issued: 2016-08-16
Identifier: FSU_pmch_27492587, 10.1039/c6ob01351a, PMC5008855, 27492587, 27492587
Format: Citation

Title: Influence of grain boundary characteristics on thermal stability in nanotwinned copper.
Creator: Niu, Rongmei, Han, Ke, Su, Yi-Feng, Besara, Tiglet, Siegrist, Theo M, Zuo, Xiaowei
Abstract/Description: High density grain boundaries provide high strength, but may introduce undesirable features, such as high Fermi levels and instability. We investigated the kinetics of recovery and recrystallization of Cu that was manufactured to include both nanotwins (NT) and high-angle columnar boundaries. We used the isothermal Johnson-Mehl-Avrami-Kolmogorov (JMAK) model to estimate activation energy values for recovery and recrystallization and compared those to values derived using the non-isothermal...
Show moreHigh density grain boundaries provide high strength, but may introduce undesirable features, such as high Fermi levels and instability. We investigated the kinetics of recovery and recrystallization of Cu that was manufactured to include both nanotwins (NT) and high-angle columnar boundaries. We used the isothermal Johnson-Mehl-Avrami-Kolmogorov (JMAK) model to estimate activation energy values for recovery and recrystallization and compared those to values derived using the non-isothermal Kissinger equation. The JMAK model hinges on an exponent that expresses the growth mechanism of a material. The exponent for this Cu was close to 0.5, indicating low-dimensional microstructure evolution, which is associated with anisotropic twin coarsening, heterogeneous recrystallization, and high stability. Since this Cu was of high purity, there was a negligible impurity-drag-effect on boundaries. The twin coarsening and heterogeneous recrystallization resulted from migration of high-angle columnar boundaries with their triple junctions in one direction, assisted by the presence of high concentration vacancies at boundaries. Analyses performed by electron energy loss spectroscopy of atomic columns at twin boundaries (TBs) and in the interior showed similar plasma peak shapes and L3 edge positions. This implies that values for conductivity and Fermi level are equal for atoms at TBs and in the interior.
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Date Issued: 2016-08-12
Identifier: FSU_pmch_27514474, 10.1038/srep31410, PMC4981844, 27514474, 27514474, srep31410
Format: Citation

Title: Generalized Ensemble Sampling of Enzyme Reaction Free Energy Pathways.
Creator: Wu, D, Fajer, M I, Cao, L, Cheng, X, Yang, W
Abstract/Description: Free energy path sampling plays an essential role in computational understanding of chemical reactions, particularly those occurring in enzymatic environments. Among a variety of molecular dynamics simulation approaches, the generalized ensemble sampling strategy is uniquely attractive for the fact that it not only can enhance the sampling of rare chemical events but also can naturally ensure consistent exploration of environmental degrees of freedom. In this review, we plan to provide a...
Show moreFree energy path sampling plays an essential role in computational understanding of chemical reactions, particularly those occurring in enzymatic environments. Among a variety of molecular dynamics simulation approaches, the generalized ensemble sampling strategy is uniquely attractive for the fact that it not only can enhance the sampling of rare chemical events but also can naturally ensure consistent exploration of environmental degrees of freedom. In this review, we plan to provide a tutorial-like tour on an emerging topic: generalized ensemble sampling of enzyme reaction free energy path. The discussion is largely focused on our own studies, particularly ones based on the metadynamics free energy sampling method and the on-the-path random walk path sampling method. We hope that this minipresentation will provide interested practitioners some meaningful guidance for future algorithm formulation and application study.
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Date Issued: 2016-01-01
Identifier: FSU_pmch_27498634, 10.1016/bs.mie.2016.05.012, PMC4978182, 27498634, 27498634, S0076-6879(16)30047-7
Format: Citation

Title: Prevalence and Factors Associated With Statin Use Among a Nationally Representative Sample of US Adults: National Health and Nutrition Examination Survey, 2011-2012..
Creator: Adedinsewo, Demilade, Taka, Nchang, Agasthi, Pradyumna, Sachdeva, Rajesh, Rust, George, Onwuanyi, Anekwe
Abstract/Description: The 2013 American College of Cardiology/American Heart Association guidelines recommend statins for adults age ≤75 years who have clinical atherosclerotic cardiovascular disease (IA) and adults age 40 to 75 years with diabetes mellitus and LDL-C 70-189 mg/dl (IA). Our aim was to estimate the prevalence and likelihood of statin use among selected statin benefit groups. Using data from the National Health and Nutrition Examination Survey (NHANES) 2011-2012, we examined 5319 adults age ≥20 years...
Show moreThe 2013 American College of Cardiology/American Heart Association guidelines recommend statins for adults age ≤75 years who have clinical atherosclerotic cardiovascular disease (IA) and adults age 40 to 75 years with diabetes mellitus and LDL-C 70-189 mg/dl (IA). Our aim was to estimate the prevalence and likelihood of statin use among selected statin benefit groups. Using data from the National Health and Nutrition Examination Survey (NHANES) 2011-2012, we examined 5319 adults age ≥20 years. We estimated weighted frequencies and prevalence of statin use for adults with diabetes mellitus and dyslipidemia (or low-density lipoprotein cholesterol ≥70 mg/dL), defined as statin benefit group 1 (SBG1); and for adults with atherosclerotic cardiovascular disease, defined as statin benefit group 2 (SBG2). We constructed a logistic regression model to estimate odds of statin use in SBG1. Overall, an estimated 38.6 million Americans are on a statin. In adjusted models, uninsured and Hispanic adults were less likely to be on a statin compared with white adults; 59.5% (95% confidence interval [CI]: 53.0-66.1) of all adults in SBG1, 58.8% (95% CI: 51.5-66.1) of adults age 40 to 75 in SBG1, and 63.5% (95% CI: 55.6-71.4) of all adults in SBG2 were on a statin. Although the prevalence of statin use has increased over time, Hispanic ethnicity and lack of insurance remain barriers to statin use. Black-white racial disparities were not significant. Our study provides a baseline estimate of statin use in the noninstitutionalized population just prior to introduction of the new guidelines and provides a reference for evaluating the impact of the new guidelines on statin utilization.
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Date Issued: 2016-09-01
Identifier: FSU_pmch_27505443, 10.1002/clc.22577, PMC5030167, 27505443, 27505443
Format: Citation

Title: Psychometric analysis of the Systematic Observation of Red Flags for autism spectrum disorder in toddlers.
Creator: Dow, Deanna, Guthrie, Whitney, Stronach, Sheri T, Wetherby, Amy M
Abstract/Description: The purpose of this study was to examine the utility of the Systematic Observation of Red Flags as an observational level-two screening measure to detect risk for autism spectrum disorder in toddlers when used with a video-recorded administration of the Communication and Symbolic Behavior Scales. Psychometric properties of the Systematic Observation of Red Flags were examined in a sample of 247 toddlers of 16- to 24 months old: 130 with autism spectrum disorder, 61 with developmental delays,...
Show moreThe purpose of this study was to examine the utility of the Systematic Observation of Red Flags as an observational level-two screening measure to detect risk for autism spectrum disorder in toddlers when used with a video-recorded administration of the Communication and Symbolic Behavior Scales. Psychometric properties of the Systematic Observation of Red Flags were examined in a sample of 247 toddlers of 16- to 24 months old: 130 with autism spectrum disorder, 61 with developmental delays, and 56 typically developing. Individual items were examined for performance to create an algorithm with improved sensitivity and specificity, yielding a total Composite score and Domain scores for Social Communication and Restricted Repetitive Behaviors. Codes indicating clear symptom presence were collapsed to yield a count of the number of Red Flags for the overall scale and each symptom domain. Results indicated significant group differences with large effects for the Composite, both Domain scores, and Red Flags score, and good discrimination (area under the curve = 0.84-0.87) between autism spectrum disorder and nonspectrum groups for the Composite, Social Communication Domain, and Social Communication Red Flags score. The Systematic Observation of Red Flags provides an observational screening measure for 16- to 24-month-olds with good discrimination, sensitivity, and specificity. A cutoff of 20 on the Composite is recommended to optimally detect autism spectrum disorder risk.
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Date Issued: 2017-04-01
Identifier: FSU_pmch_27132013, 10.1177/1362361316636760, PMC5734914, 27132013, 27132013, 1362361316636760
Format: Citation

Title: Developing Asthma-Friendly Childcare Centers with Online Training and Evaluation.
Creator: Nowakowski, Alexandra Catherine Hayes, Carretta, Henry Joseph, Pineda, Nicole, Dudley, Julie Kurlfink, Forrest, Jamie R
Abstract/Description: In 2011, the Florida Asthma Coalition (FAC) began offering its Asthma-Friendly Childcare Center (AFCC) training online. This course teaches childcare center employees the fundamentals of effective asthma management. It covers basic asthma physiology, ways to recognize asthma attacks, techniques to help children experiencing attacks, and strategies to create healthy environments for asthmatics. A team of health services researchers evaluated both years of the online training. Evaluators used a...
Show moreIn 2011, the Florida Asthma Coalition (FAC) began offering its Asthma-Friendly Childcare Center (AFCC) training online. This course teaches childcare center employees the fundamentals of effective asthma management. It covers basic asthma physiology, ways to recognize asthma attacks, techniques to help children experiencing attacks, and strategies to create healthy environments for asthmatics. A team of health services researchers evaluated both years of the online training. Evaluators used a quasi-experimental design with pretest, posttest, and follow-up assessment. Questions measured knowledge gain and retention, user satisfaction, and implementation of management strategies. Over 650 people from nearly all 67 Florida counties took AFCC training online between 2011 and 2013. Test scores improved by a minimum of 11% points in all program years evaluated. Gains in both knowledge and confidence were substantial and highly significant across years. While individual trainees did forget some content on follow-up, they seemed to retain the specific messages most relevant for their own workplaces. Most trainees also planned to implement multiple management strategies recommended by the training. A large majority of participants rated the training as excellent on all quality metrics, including relevance of content and time efficiency of the online format. Nearly all respondents perceived the training as useful for both providing improved care and fulfilling licensure or certification requirements. Many participants also indicated that their centers would pursue formal certification as AFCCs via the program offered by FAC. The online AFCC course performed strongly in its first years, yielding both high participant satisfaction and substantial improvement in workplace asthma management activity. This training holds promise for introducing and improving multidimensional asthma management strategies at childcare facilities nationwide.
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Date Issued: 2016-03-16
Identifier: FSU_pmch_27014676, 10.3389/fpubh.2016.00039, PMC4792866, 27014676, 27014676
Format: Citation

Title: Autonomic Nervous System Responses During Perception of Masked Speech may Reflect Constructs other than Subjective Listening Effort.
Creator: Francis, Alexander L, MacPherson, Megan K, Chandrasekaran, Bharath, Alvar, Ann M
Abstract/Description: Typically, understanding speech seems effortless and automatic. However, a variety of factors may, independently or interactively, make listening more effortful. Physiological measures may help to distinguish between the application of different cognitive mechanisms whose operation is perceived as effortful. In the present study, physiological and behavioral measures associated with task demand were collected along with behavioral measures of performance while participants listened to and...
Show moreTypically, understanding speech seems effortless and automatic. However, a variety of factors may, independently or interactively, make listening more effortful. Physiological measures may help to distinguish between the application of different cognitive mechanisms whose operation is perceived as effortful. In the present study, physiological and behavioral measures associated with task demand were collected along with behavioral measures of performance while participants listened to and repeated sentences. The goal was to measure psychophysiological reactivity associated with three degraded listening conditions, each of which differed in terms of the source of the difficulty (distortion, energetic masking, and informational masking), and therefore were expected to engage different cognitive mechanisms. These conditions were chosen to be matched for overall performance (keywords correct), and were compared to listening to unmasked speech produced by a natural voice. The three degraded conditions were: (1) Unmasked speech produced by a computer speech synthesizer, (2) Speech produced by a natural voice and masked byspeech-shaped noise and (3) Speech produced by a natural voice and masked by two-talker babble. Masked conditions were both presented at a -8 dB signal to noise ratio (SNR), a level shown in previous research to result in comparable levels of performance for these stimuli and maskers. Performance was measured in terms of proportion of key words identified correctly, and task demand or effort was quantified subjectively by self-report. Measures of psychophysiological reactivity included electrodermal (skin conductance) response frequency and amplitude, blood pulse amplitude and pulse rate. Results suggest that the two masked conditions evoked stronger psychophysiological reactivity than did the two unmasked conditions even when behavioral measures of listening performance and listeners' subjective perception of task demand were comparable across the three degraded conditions.
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Date Issued: 2016-03-01
Identifier: FSU_pmch_26973564, 10.3389/fpsyg.2016.00263, PMC4772584, 26973564, 26973564
Format: Citation

Title: Role of cardiac troponin I carboxy terminal mobile domain and linker sequence in regulating cardiac contraction.
Creator: Meyer, Nancy L, Chase, P Bryant
Abstract/Description: Inhibition of striated muscle contraction at resting Ca(2+) depends on the C-terminal half of troponin I (TnI) in thin filaments. Much focus has been on a short inhibitory peptide (Ip) sequence within TnI, but structural studies and identification of disease-associated mutations broadened emphasis to include a larger mobile domain (Md) sequence at the C-terminus of TnI. For Md to function effectively in muscle relaxation, tight mechanical coupling to troponin's core-and thus tropomyosin-is...
Show moreInhibition of striated muscle contraction at resting Ca(2+) depends on the C-terminal half of troponin I (TnI) in thin filaments. Much focus has been on a short inhibitory peptide (Ip) sequence within TnI, but structural studies and identification of disease-associated mutations broadened emphasis to include a larger mobile domain (Md) sequence at the C-terminus of TnI. For Md to function effectively in muscle relaxation, tight mechanical coupling to troponin's core-and thus tropomyosin-is presumably needed. We generated recombinant, human cardiac troponins containing one of two TnI constructs: either an 8-amino acid linker between Md and the rest of troponin (cTnILink8), or an Md deletion (cTnI1-163). Motility assays revealed that Ca(2+)-sensitivity of reconstituted thin filament sliding was markedly increased with cTnILink8 (∼0.9 pCa unit leftward shift of speed-pCa relation compared to WT), and increased further when Md was missing entirely (∼1.4 pCa unit shift). Cardiac Tn's ability to turn off filament sliding at diastolic Ca(2+) was mostly (61%), but not completely eliminated with cTnI1-163. TnI's Md is required for full inhibition of unloaded filament sliding, although other portions of troponin-presumably including Ip-are also necessary. We also confirm that TnI's Md is not responsible for superactivation of actomyosin cycling by troponin.
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Date Issued: 2016-07-01
Identifier: FSU_pmch_26971468, 10.1016/j.abb.2016.03.010, PMC4899117, 26971468, 26971468, S0003-9861(16)30062-5
Format: Citation

Title: Low rates of nitrogen fixation in eastern tropical South Pacific surface waters.
Creator: Knapp, Angela N, Casciotti, Karen L, Berelson, William M, Prokopenko, Maria G, Capone, Douglas G
Abstract/Description: An extensive region of the Eastern Tropical South Pacific (ETSP) Ocean has surface waters that are nitrate-poor yet phosphate-rich. It has been proposed that this distribution of surface nutrients provides a geochemical niche favorable for N2fixation, the primary source of nitrogen to the ocean. Here, we present results from two cruises to the ETSP where rates of N2fixation and its contribution to export production were determined with a suite of geochemical and biological measurements....
Show moreAn extensive region of the Eastern Tropical South Pacific (ETSP) Ocean has surface waters that are nitrate-poor yet phosphate-rich. It has been proposed that this distribution of surface nutrients provides a geochemical niche favorable for N2fixation, the primary source of nitrogen to the ocean. Here, we present results from two cruises to the ETSP where rates of N2fixation and its contribution to export production were determined with a suite of geochemical and biological measurements. N2fixation was only detectable using nitrogen isotopic mass balances at two of six stations, and rates ranged from 0 to 23 µmol N m(-2)d(-1)based on sediment trap fluxes. Whereas the fractional importance of N2fixation did not change, the N2-fixation rates at these two stations were several-fold higher when scaled to other productivity metrics. Regardless of the choice of productivity metric these N2-fixation rates are low compared with other oligotrophic locations, and the nitrogen isotope budgets indicate that N2fixation supports no more than 20% of export production regionally. Although euphotic zone-integrated short-term N2-fixation rates were higher, up to 100 µmol N m(-2)d(-1), and detected N2fixation at all six stations, studies of nitrogenase gene abundance and expression from the same cruises align with the geochemical data and together indicate that N2fixation is a minor source of new nitrogen to surface waters of the ETSP. This finding is consistent with the hypothesis that, despite a relative abundance of phosphate, iron may limit N2fixation in the ETSP.
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Date Issued: 2016-04-19
Identifier: FSU_pmch_26976587, 10.1073/pnas.1515641113, PMC4843426, 26976587, 26976587, 1515641113
Format: Citation

Title: Utilization of Alcohol Treatment Among HIV-Positive Women with Hazardous Drinking.
Creator: Hu, Xingdi, Harman, Jeffrey, Winterstein, Almut G, Zhong, Yue, Wheeler, Amber L, Taylor, Tonya N, Plankey, Michael, Rubtsova, Anna, Cropsey, Karen, Cohen, Mardge H, Adimora,...
Show moreHu, Xingdi, Harman, Jeffrey, Winterstein, Almut G, Zhong, Yue, Wheeler, Amber L, Taylor, Tonya N, Plankey, Michael, Rubtsova, Anna, Cropsey, Karen, Cohen, Mardge H, Adimora, Adaora A, Milam, Joel, Adedimeji, Adebola, Cook, Robert L
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Abstract/Description: Hazardous alcohol consumption has been frequently reported among women with HIV infection and is associated with a variety of negative health consequences. Treatments to reduce alcohol use may bring in health benefits. However, little is known regarding the utilization of alcohol treatment services among HIV+ women with hazardous drinking. Using data from the Women's Interagency HIV Study (WIHS), this study assessed utilization of any alcohol treatment in the past 6 months and performed...
Show moreHazardous alcohol consumption has been frequently reported among women with HIV infection and is associated with a variety of negative health consequences. Treatments to reduce alcohol use may bring in health benefits. However, little is known regarding the utilization of alcohol treatment services among HIV+ women with hazardous drinking. Using data from the Women's Interagency HIV Study (WIHS), this study assessed utilization of any alcohol treatment in the past 6 months and performed multivariable logistic regression to determine correlates of receipt of any alcohol treatment. Among 474 HIV+ women reporting recent hazardous drinking, less than one in five (19%) reported recent utilization of any alcohol treatment. Alcoholics Anonymous (AA) was the most commonly reported (12.9%), followed by inpatient detoxification (9.9%) and outpatient alcohol treatment program (7.0%). Half (51%) receiving any alcohol treatment reported utilization of multiple treatments. Multivariable analyses found alcohol treatment was more often utilized by those who had social support (odds ratio [OR]=1.68, 95% confidence interval [CI]=1.00 to 2.83), fewer economic resources (income ≤$12,000 vs. >$12,000, OR=3.10, 95% CI=1.53 to 6.27), higher levels of drinking (16-35 drinks/week vs. 12-15 drinks/week, OR=3.02, 95% CI=1.47 to 6.21; 36+ drinks/week vs. 12-15 drinks/week, OR=4.41, 95% CI=2.03 to 9.59), and those who reported any illicit drug use (OR=2.77, 95% CI=1.44 to 5.34). More efforts are needed to enhance the utilization of alcohol treatment. Our findings highlight the unique profile of those who utilized alcohol treatment. Such information is vital to improve treatment delivery to address unmet need in this particular population.
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Date Issued: 2016-05-01
Identifier: FSU_pmch_26961420, 10.1016/j.jsat.2016.01.011, PMC4943324, 26961420, 26961420, S0740-5472(16)00043-X
Format: Citation

Title: Maternal residential exposure to agricultural pesticides and birth defects in a 2003 to 2005 North Carolina birth cohort.
Creator: Rappazzo, Kristen M, Warren, Joshua L, Meyer, Robert E, Herring, Amy H, Sanders, Alison P, Brownstein, Naomi C, Luben, Thomas J
Abstract/Description: Birth defects are responsible for a large proportion of disability and infant mortality. Exposure to a variety of pesticides have been linked to increased risk of birth defects. We conducted a case-control study to estimate the associations between a residence-based metric of agricultural pesticide exposure and birth defects. We linked singleton live birth records for 2003 to 2005 from the North Carolina (NC) State Center for Health Statistics to data from the NC Birth Defects Monitoring...
Show moreBirth defects are responsible for a large proportion of disability and infant mortality. Exposure to a variety of pesticides have been linked to increased risk of birth defects. We conducted a case-control study to estimate the associations between a residence-based metric of agricultural pesticide exposure and birth defects. We linked singleton live birth records for 2003 to 2005 from the North Carolina (NC) State Center for Health Statistics to data from the NC Birth Defects Monitoring Program. Included women had residence at delivery inside NC and infants with gestational ages from 20 to 44 weeks (n = 304,906). Pesticide exposure was assigned using a previously constructed metric, estimating total chemical exposure (pounds of active ingredient) based on crops within 500 meters of maternal residence, specific dates of pregnancy, and chemical application dates based on the planting/harvesting dates of each crop. Logistic regression was used to estimate odds ratios (ORs) and 95% confidence intervals for four categories of exposure (<10(th) , 10-50(th) , 50-90(th) , and >90(th) percentiles) compared with unexposed. Models were adjusted for maternal race, age at delivery, education, marital status, and smoking status. We observed elevated ORs for congenital heart defects and certain structural defects affecting the gastrointestinal, genitourinary and musculoskeletal systems (e.g., OR [95% confidence interval] [highest exposure vs. unexposed] for tracheal esophageal fistula/esophageal atresia = 1.98 [0.69, 5.66], and OR for atrial septal defects: 1.70 [1.34, 2.14]). Our results provide some evidence of associations between residential exposure to agricultural pesticides and several birth defects phenotypes. Birth Defects Research (Part A) 106:240-249, 2016. © 2016 Wiley Periodicals, Inc.
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Date Issued: 2016-04-01
Identifier: FSU_pmch_26970546, 10.1002/bdra.23479, PMC4833532, 26970546, 26970546
Format: Citation

Title: Status of underrepresented minority and female faculty at medical schools located within Historically Black Colleges and in Puerto Rico.
Creator: Mader, Emily M, Rodríguez, José E, Campbell, Kendall M, Smilnak, Timothy, Bazemore, Andrew W, Petterson, Stephen, Morley, Christopher P
Abstract/Description: To assess the impact of medical school location in Historically Black Colleges and Universities (HBCU) and Puerto Rico (PR) on the proportion of underrepresented minorities in medicine (URMM) and women hired in faculty and leadership positions at academic medical institutions. AAMC 2013 faculty roster data for allopathic medical schools were used to compare the racial/ethnic and gender composition of faculty and chair positions at medical schools located within HBCU and PR to that of other...
Show moreTo assess the impact of medical school location in Historically Black Colleges and Universities (HBCU) and Puerto Rico (PR) on the proportion of underrepresented minorities in medicine (URMM) and women hired in faculty and leadership positions at academic medical institutions. AAMC 2013 faculty roster data for allopathic medical schools were used to compare the racial/ethnic and gender composition of faculty and chair positions at medical schools located within HBCU and PR to that of other medical schools in the United States. Data were compared using independent sample t-tests. Women were more highly represented in HBCU faculty (mean HBCU 43.5% vs. non-HBCU 36.5%, p=0.024) and chair (mean HBCU 30.1% vs. non-HBCU 15.6%, p=0.005) positions and in PR chair positions (mean PR 38.23% vs. non-PR 15.38%, p=0.016) compared with other allopathic institutions. HBCU were associated with increased African American representation in faculty (mean HBCU 59.5% vs. non-HBCU 2.6%, p=0.011) and chair (mean HBCU 73.1% vs. non-HBCU 2.2%, p≤0.001) positions. PR designation was associated with increased faculty (mean PR 75.40% vs. non-PR 3.72%, p≤0.001) and chair (mean PR 75.00% vs. non-PR 3.54%, p≤0.001) positions filled by Latinos/Hispanics. Women and African Americans are better represented in faculty and leadership positions at HBCU, and women and Latino/Hispanics at PR medical schools, than they are at allopathic peer institutions.
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Date Issued: 2016-03-09
Identifier: FSU_pmch_26968254, 10.3402/meo.v21.29535, PMC4788771, 26968254, 26968254, 29535
Format: Citation

Title: Genetic variants associated with subjective well-being, depressive symptoms, and neuroticism identified through genome-wide analyses.
Creator: Okbay, Aysu, Baselmans, Bart M L, De Neve, Jan-Emmanuel, Turley, Patrick, Nivard, Michel G, Fontana, Mark Alan, Meddens, S Fleur W, Linnér, Richard Karlsson, Rietveld, Cornelius...
Show moreOkbay, Aysu, Baselmans, Bart M L, De Neve, Jan-Emmanuel, Turley, Patrick, Nivard, Michel G, Fontana, Mark Alan, Meddens, S Fleur W, Linnér, Richard Karlsson, Rietveld, Cornelius A, Derringer, Jaime, Gratten, Jacob, Lee, James J, Liu, Jimmy Z, de Vlaming, Ronald, Ahluwalia, Tarunveer S, Buchwald, Jadwiga, Cavadino, Alana, Frazier-Wood, Alexis C, Furlotte, Nicholas A, Garfield, Victoria, Geisel, Marie Henrike, Gonzalez, Juan R, Haitjema, Saskia, Karlsson, Robert, van der Laan, Sander W, Ladwig, Karl-Heinz, Lahti, Jari, van der Lee, Sven J, Lind, Penelope A, Liu, Tian, Matteson, Lindsay, Mihailov, Evelin, Miller, Michael B, Minica, Camelia C, Nolte, Ilja M, Mook-Kanamori, Dennis, van der Most, Peter J, Oldmeadow, Christopher, Qian, Yong, Raitakari, Olli, Rawal, Rajesh, Realo, Anu, Rueedi, Rico, Schmidt, Börge, Smith, Albert V, Stergiakouli, Evie, Tanaka, Toshiko, Taylor, Kent, Thorleifsson, Gudmar, Wedenoja, Juho, Wellmann, Juergen, Westra, Harm-Jan, Willems, Sara M, Zhao, Wei, Amin, Najaf, Bakshi, Andrew, Bergmann, Sven, Bjornsdottir, Gyda, Boyle, Patricia A, Cherney, Samantha, Cox, Simon R, Davies, Gail, Davis, Oliver S P, Ding, Jun, Direk, Nese, Eibich, Peter, Emeny, Rebecca T, Fatemifar, Ghazaleh, Faul, Jessica D, Ferrucci, Luigi, Forstner, Andreas J, Gieger, Christian, Gupta, Richa, Harris, Tamara B, Harris, Juliette M, Holliday, Elizabeth G, Hottenga, Jouke-Jan, De Jager, Philip L, Kaakinen, Marika A, Kajantie, Eero, Karhunen, Ville, Kolcic, Ivana, Kumari, Meena, Launer, Lenore J, Franke, Lude, Li-Gao, Ruifang, Liewald, David C, Koini, Marisa, Loukola, Anu, Marques-Vidal, Pedro, Montgomery, Grant W, Mosing, Miriam A, Paternoster, Lavinia, Pattie, Alison, Petrovic, Katja E, Pulkki-Råback, Laura, Quaye, Lydia, Räikkönen, Katri, Rudan, Igor, Scott, Rodney J, Smith, Jennifer A, Sutin, Angelina R, Trzaskowski, Maciej, Vinkhuyzen, Anna E, Yu, Lei, Zabaneh, Delilah, Attia, John R, Bennett, David A, Berger, Klaus, Bertram, Lars, Boomsma, Dorret I, Snieder, Harold, Chang, Shun-Chiao, Cucca, Francesco, Deary, Ian J, van Duijn, Cornelia M, Eriksson, Johan G, Bültmann, Ute, de Geus, Eco J C, Groenen, Patrick J F, Gudnason, Vilmundur, Hansen, Torben, Hartman, Catharine A, Haworth, Claire M A, Hayward, Caroline, Heath, Andrew C, Hinds, David A, Hyppönen, Elina, Iacono, William G, Järvelin, Marjo-Riitta, Jöckel, Karl-Heinz, Kaprio, Jaakko, Kardia, Sharon L R, Keltikangas-Järvinen, Liisa, Kraft, Peter, Kubzansky, Laura D, Lehtimäki, Terho, Magnusson, Patrik K E, Martin, Nicholas G, McGue, Matt, Metspalu, Andres, Mills, Melinda, de Mutsert, Renée, Oldehinkel, Albertine J, Pasterkamp, Gerard, Pedersen, Nancy L, Plomin, Robert, Polasek, Ozren, Power, Christine, Rich, Stephen S, Rosendaal, Frits R, den Ruijter, Hester M, Schlessinger, David, Schmidt, Helena, Svento, Rauli, Schmidt, Reinhold, Alizadeh, Behrooz Z, Sørensen, Thorkild I A, Spector, Tim D, Starr, John M, Stefansson, Kari, Steptoe, Andrew, Terracciano, Antonio, Thorsteinsdottir, Unnur, Thurik, A Roy, Timpson, Nicholas J, Tiemeier, Henning, Uitterlinden, André G, Vollenweider, Peter, Wagner, Gert G, Weir, David R, Yang, Jian, Conley, Dalton C, Smith, George Davey, Hofman, Albert, Johannesson, Magnus, Laibson, David I, Medland, Sarah E, Meyer, Michelle N, Pickrell, Joseph K, Esko, Tõnu, Krueger, Robert F, Beauchamp, Jonathan P, Koellinger, Philipp D, Benjamin, Daniel J, Bartels, Meike, Cesarini, David
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Abstract/Description: Very few genetic variants have been associated with depression and neuroticism, likely because of limitations on sample size in previous studies. Subjective well-being, a phenotype that is genetically correlated with both of these traits, has not yet been studied with genome-wide data. We conducted genome-wide association studies of three phenotypes: subjective well-being (n = 298,420), depressive symptoms (n = 161,460), and neuroticism (n = 170,911). We identify 3 variants associated with...
Show moreVery few genetic variants have been associated with depression and neuroticism, likely because of limitations on sample size in previous studies. Subjective well-being, a phenotype that is genetically correlated with both of these traits, has not yet been studied with genome-wide data. We conducted genome-wide association studies of three phenotypes: subjective well-being (n = 298,420), depressive symptoms (n = 161,460), and neuroticism (n = 170,911). We identify 3 variants associated with subjective well-being, 2 variants associated with depressive symptoms, and 11 variants associated with neuroticism, including 2 inversion polymorphisms. The two loci associated with depressive symptoms replicate in an independent depression sample. Joint analyses that exploit the high genetic correlations between the phenotypes (|ρ^| ≈ 0.8) strengthen the overall credibility of the findings and allow us to identify additional variants. Across our phenotypes, loci regulating expression in central nervous system and adrenal or pancreas tissues are strongly enriched for association.
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Date Issued: 2016-06-01
Identifier: FSU_pmch_27089181, 10.1038/ng.3552, PMC4884152, 27089181, 27089181, ng.3552
Format: Citation

Title: Coral-Associated Bacterial Diversity Is Conserved across Two Deep-Sea Anthothela Species.
Creator: Lawler, Stephanie N, Kellogg, Christina A, France, Scott C, Clostio, Rachel W, Brooke, Sandra D, Ross, Steve W
Abstract/Description: Cold-water corals, similar to tropical corals, contain diverse and complex microbial assemblages. These bacteria provide essential biological functions within coral holobionts, facilitating increased nutrient utilization and production of antimicrobial compounds. To date, few cold-water octocoral species have been analyzed to explore the diversity and abundance of their microbial associates. For this study, 23 samples of the family Anthothelidae were collected from Norfolk (n = 12) and...
Show moreCold-water corals, similar to tropical corals, contain diverse and complex microbial assemblages. These bacteria provide essential biological functions within coral holobionts, facilitating increased nutrient utilization and production of antimicrobial compounds. To date, few cold-water octocoral species have been analyzed to explore the diversity and abundance of their microbial associates. For this study, 23 samples of the family Anthothelidae were collected from Norfolk (n = 12) and Baltimore Canyons (n = 11) from the western Atlantic in August 2012 and May 2013. Genetic testing found that these samples comprised two Anthothela species (Anthothela grandiflora and Anthothela sp.) and Alcyonium grandiflorum. DNA was extracted and sequenced with primers targeting the V4-V5 variable region of the 16S rRNA gene using 454 pyrosequencing with GS FLX Titanium chemistry. Results demonstrated that the coral host was the primary driver of bacterial community composition. Al. grandiflorum, dominated by Alteromonadales and Pirellulales had much higher species richness, and a distinct bacterial community compared to Anthothela samples. Anthothela species (A. grandiflora and Anthothela sp.) had very similar bacterial communities, dominated by Oceanospirillales and Spirochaetes. Additional analysis of core-conserved bacteria at 90% sample coverage revealed genus level conservation across Anthothela samples. This core included unclassified Oceanospirillales, Kiloniellales, Campylobacterales, and genus Spirochaeta. Members of this core were previously recognized for their functional capabilities in nitrogen cycling and suggest the possibility of a nearly complete nitrogen cycle within Anthothela species. Overall, many of the bacterial associates identified in this study have the potential to contribute to the acquisition and cycling of nutrients within the coral holobiont.
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Date Issued: 2016-04-05
Identifier: FSU_pmch_27092120, 10.3389/fmicb.2016.00458, PMC4820459, 27092120, 27092120
Format: Citation

Title: Saharan dust nutrients promote Vibrio bloom formation in marine surface waters.
Creator: Westrich, Jason R, Ebling, Alina M, Landing, William M, Joyner, Jessica L, Kemp, Keri M, Griffin, Dale W, Lipp, Erin K
Abstract/Description: Vibrio is a ubiquitous genus of marine bacteria, typically comprising a small fraction of the total microbial community in surface waters, but capable of becoming a dominant taxon in response to poorly characterized factors. Iron (Fe), often restricted by limited bioavailability and low external supply, is an essential micronutrient that can limit Vibrio growth. Vibrio species have robust metabolic capabilities and an array of Fe-acquisition mechanisms, and are able to respond rapidly to...
Show moreVibrio is a ubiquitous genus of marine bacteria, typically comprising a small fraction of the total microbial community in surface waters, but capable of becoming a dominant taxon in response to poorly characterized factors. Iron (Fe), often restricted by limited bioavailability and low external supply, is an essential micronutrient that can limit Vibrio growth. Vibrio species have robust metabolic capabilities and an array of Fe-acquisition mechanisms, and are able to respond rapidly to nutrient influx, yet Vibrio response to environmental pulses of Fe remains uncharacterized. Here we examined the population growth of Vibrio after natural and simulated pulses of atmospherically transported Saharan dust, an important and episodic source of Fe to tropical marine waters. As a model for opportunistic bacterial heterotrophs, we demonstrated that Vibrio proliferate in response to a broad range of dust-Fe additions at rapid timescales. Within 24 h of exposure, strains of Vibrio cholerae and Vibrio alginolyticus were able to directly use Saharan dust-Fe to support rapid growth. These findings were also confirmed with in situ field studies; arrival of Saharan dust in the Caribbean and subtropical Atlantic coincided with high levels of dissolved Fe, followed by up to a 30-fold increase of culturable Vibrio over background levels within 24 h. The relative abundance of Vibrio increased from ∼1 to ∼20% of the total microbial community. This study, to our knowledge, is the first to describe Vibrio response to Saharan dust nutrients, having implications at the intersection of marine ecology, Fe biogeochemistry, and both human and environmental health.
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Date Issued: 2016-05-24
Identifier: FSU_pmch_27162369, 10.1073/pnas.1518080113, PMC4889353, 27162369, 27162369, 1518080113
Format: Citation

Title: Sliding of centrosome-unattached microtubules defines key features of neuronal phenotype.
Creator: Rao, Anand N, Falnikar, Aditi, O'Toole, Eileen T, Morphew, Mary K, Hoenger, Andreas, Davidson, Michael W, Yuan, Xiaobing, Baas, Peter W
Abstract/Description: Contemporary models for neuronal migration are grounded in the view that virtually all functionally relevant microtubules (MTs) in migrating neurons are attached to the centrosome, which occupies a position between the nucleus and a short leading process. It is assumed that MTs do not undergo independent movements but rather transduce forces that enable movements of the centrosome and nucleus. The present results demonstrate that although this is mostly true, a small fraction of the MTs are...
Show moreContemporary models for neuronal migration are grounded in the view that virtually all functionally relevant microtubules (MTs) in migrating neurons are attached to the centrosome, which occupies a position between the nucleus and a short leading process. It is assumed that MTs do not undergo independent movements but rather transduce forces that enable movements of the centrosome and nucleus. The present results demonstrate that although this is mostly true, a small fraction of the MTs are centrosome-unattached, and this permits limited sliding of MTs. When this sliding is pharmacologically inhibited, the leading process becomes shorter, migration of the neuron deviates from its normal path, and the MTs within the leading process become buckled. Partial depletion of ninein, a protein that attaches MTs to the centrosome, leads to greater numbers of centrosome-unattached MTs as well as greater sliding of MTs. Concomitantly, the soma becomes less mobile and the leading process acquires an elongated morphology akin to an axon.
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Date Issued: 2016-05-09
Identifier: FSU_pmch_27138250, 10.1083/jcb.201506140, PMC4862329, 27138250, 27138250, jcb.201506140
Format: Citation

Title: Pressure and high-Tc superconductivity in sulfur hydrides.
Creator: Gor'kov, Lev P, Kresin, Vladimir Z
Abstract/Description: The paper discusses fundamentals of record-TC superconductivity discovered under high pressure in sulfur hydride. The rapid increase of TC with pressure in the vicinity of Pcr ≈ 123GPa is interpreted as the fingerprint of a first-order structural transition. Based on the cubic symmetry of the high-TC phase, it is argued that the lower-TC phase has a different periodicity, possibly related to an instability with a commensurate structural vector. In addition to the acoustic branches, the phonon...
Show moreThe paper discusses fundamentals of record-TC superconductivity discovered under high pressure in sulfur hydride. The rapid increase of TC with pressure in the vicinity of Pcr ≈ 123GPa is interpreted as the fingerprint of a first-order structural transition. Based on the cubic symmetry of the high-TC phase, it is argued that the lower-TC phase has a different periodicity, possibly related to an instability with a commensurate structural vector. In addition to the acoustic branches, the phonon spectrum of H3S contains hydrogen modes with much higher frequencies. Because of the complex spectrum, usual methods of calculating TC are here inapplicable. A modified approach is formulated and shown to provide realistic values for TC and to determine the relative contributions of optical and acoustic branches. The isotope effect (change of TC upon Deuterium for Hydrogen substitution) originates from high frequency phonons and differs in the two phases. The decrease of TC following its maximum in the high-TC phase is a sign of intermixing with pairing at hole-like pockets which arise in the energy spectrum of the cubic phase at the structural transition. On-pockets pairing leads to the appearance of a second gap and is remarkable for its non-adiabatic regime: hydrogen mode frequencies are comparable to the Fermi energy.
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Date Issued: 2016-05-11
Identifier: FSU_pmch_27167334, 10.1038/srep25608, PMC4863257, 27167334, 27167334, srep25608
Format: Citation

Title: Couple-Level Economic and Career Concerns and Intimate Partner Violence in Young Adulthood.
Creator: Copp, Jennifer E, Giordano, Peggy C, Manning, Wendy D, Longmore, Monica A
Abstract/Description: Family scholars have demonstrated that economic conditions influence marital quality and relationship instability. Similarly, researchers have identified low income and poverty as important risk factors for intimate partner violence (IPV). Yet limited work has examined how economic factors influence the use of violence in the romantic context, particularly during young adulthood. Using the Toledo Adolescent Relationships Study ( = 928), we examine the influence of economic and career concerns...
Show moreFamily scholars have demonstrated that economic conditions influence marital quality and relationship instability. Similarly, researchers have identified low income and poverty as important risk factors for intimate partner violence (IPV). Yet limited work has examined how economic factors influence the use of violence in the romantic context, particularly during young adulthood. Using the Toledo Adolescent Relationships Study ( = 928), we examine the influence of economic and career concerns as specific sources of conflict on IPV among a sample of young adults. Findings suggest that these areas of disagreement within romantic relationships are associated with IPV risk, net of traditional predictors. We discuss the implications of our findings for intervention and prevention efforts.
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Date Issued: 2016-06-01
Identifier: FSU_pmch_27284209, 10.1111/jomf.12282, PMC4894749, 27284209, 27284209
Format: Citation

Title: Acculturation Factors Related to Obesity of Latino American Men Nationwide.
Creator: Ai, Amy L, Appel, Hoa B, Lee, Jungup
Abstract/Description: Obesity is a public health epidemic, particularly among underrepresented populations. With a large proportion of immigrants, Latino Americans comprise the largest minority population in the United States. This study examined the association of acculturation factors with obesity among Latino American men ( n = 1,127) using the National Latino and Asian American Study. The result identified two acculturation-related factors (being U.S.-born and living in the United States for the longest period...
Show moreObesity is a public health epidemic, particularly among underrepresented populations. With a large proportion of immigrants, Latino Americans comprise the largest minority population in the United States. This study examined the association of acculturation factors with obesity among Latino American men ( n = 1,127) using the National Latino and Asian American Study. The result identified two acculturation-related factors (being U.S.-born and living in the United States for the longest period/5-10 years) as positive correlates. In contrast, a different study on obesity in Latino American women demonstrated discrimination, but not the above factors, as significant correlates. The men's pattern suggests that the Hispanic/Latino paradox might have greater implications for men with respect to weight issues. Furthermore, Mexican American and Other Latino American men presented a greater likelihood of being obese than Cuban and Puerto Rican men. The findings, if replicated in prospective research, suggest the need for gender- and ethnic-specific intervention for obesity in Latino American men, particularly for the largest subgroup, Mexican Americans.
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Date Issued: 2018-09-01
Identifier: FSU_pmch_27283432, 10.1177/1557988316653182, PMC6142145, 27283432, 27283432, 1557988316653182
Format: Citation

Title: Early goal-directed therapy in severe sepsis and septic shock: insights and comparisons to ProCESS, ProMISe, and ARISE..
Creator: Nguyen, H Bryant, Jaehne, Anja Kathrin, Jayaprakash, Namita, Semler, Matthew W, Hegab, Sara, Yataco, Angel Coz, Tatem, Geneva, Salem, Dhafer, Moore, Steven, Boka, Kamran, Gill,...
Show moreNguyen, H Bryant, Jaehne, Anja Kathrin, Jayaprakash, Namita, Semler, Matthew W, Hegab, Sara, Yataco, Angel Coz, Tatem, Geneva, Salem, Dhafer, Moore, Steven, Boka, Kamran, Gill, Jasreen Kaur, Gardner-Gray, Jayna, Pflaum, Jacqueline, Domecq, Juan Pablo, Hurst, Gina, Belsky, Justin B, Fowkes, Raymond, Elkin, Ronald B, Simpson, Steven Q, Falk, Jay L, Singer, Daniel J, Rivers, Emanuel P
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Abstract/Description: Prior to 2001 there was no standard for early management of severe sepsis and septic shock in the emergency department. In the presence of standard or usual care, the prevailing mortality was over 40-50 %. In response, a systems-based approach, similar to that in acute myocardial infarction, stroke and trauma, called early goal-directed therapy was compared to standard care and this clinical trial resulted in a significant mortality reduction. Since the publication of that trial, similar...
Show morePrior to 2001 there was no standard for early management of severe sepsis and septic shock in the emergency department. In the presence of standard or usual care, the prevailing mortality was over 40-50 %. In response, a systems-based approach, similar to that in acute myocardial infarction, stroke and trauma, called early goal-directed therapy was compared to standard care and this clinical trial resulted in a significant mortality reduction. Since the publication of that trial, similar outcome benefits have been reported in over 70 observational and randomized controlled studies comprising over 70,000 patients. As a result, early goal-directed therapy was largely incorporated into the first 6 hours of sepsis management (resuscitation bundle) adopted by the Surviving Sepsis Campaign and disseminated internationally as the standard of care for early sepsis management. Recently a trio of trials (ProCESS, ARISE, and ProMISe), while reporting an all-time low sepsis mortality, question the continued need for all of the elements of early goal-directed therapy or the need for protocolized care for patients with severe and septic shock. A review of the early hemodynamic pathogenesis, historical development, and definition of early goal-directed therapy, comparing trial conduction methodology and the changing landscape of sepsis mortality, are essential for an appropriate interpretation of these trials and their conclusions.
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Date Issued: 2016-07-01
Identifier: FSU_pmch_27364620, 10.1186/s13054-016-1288-3, PMC4929762, 27364620, 27364620, 10.1186/s13054-016-1288-3
Format: Citation

Title: Anchored enrichment dataset for true flies (order Diptera) reveals insights into the phylogeny of flower flies (family Syrphidae).
Creator: Young, Andrew Donovan, Lemmon, Alan R, Skevington, Jeffrey H, Mengual, Ximo, Ståhls, Gunilla, Reemer, Menno, Jordaens, Kurt, Kelso, Scott, Lemmon, Emily Moriarty, Hauser, Martin...
Show moreYoung, Andrew Donovan, Lemmon, Alan R, Skevington, Jeffrey H, Mengual, Ximo, Ståhls, Gunilla, Reemer, Menno, Jordaens, Kurt, Kelso, Scott, Lemmon, Emily Moriarty, Hauser, Martin, De Meyer, Marc, Misof, Bernhard, Wiegmann, Brian M
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Abstract/Description: Anchored hybrid enrichment is a form of next-generation sequencing that uses oligonucleotide probes to target conserved regions of the genome flanked by less conserved regions in order to acquire data useful for phylogenetic inference from a broad range of taxa. Once a probe kit is developed, anchored hybrid enrichment is superior to traditional PCR-based Sanger sequencing in terms of both the amount of genomic data that can be recovered and effective cost. Due to their incredibly diverse...
Show moreAnchored hybrid enrichment is a form of next-generation sequencing that uses oligonucleotide probes to target conserved regions of the genome flanked by less conserved regions in order to acquire data useful for phylogenetic inference from a broad range of taxa. Once a probe kit is developed, anchored hybrid enrichment is superior to traditional PCR-based Sanger sequencing in terms of both the amount of genomic data that can be recovered and effective cost. Due to their incredibly diverse nature, importance as pollinators, and historical instability with regard to subfamilial and tribal classification, Syrphidae (flower flies or hoverflies) are an ideal candidate for anchored hybrid enrichment-based phylogenetics, especially since recent molecular phylogenies of the syrphids using only a few markers have resulted in highly unresolved topologies. Over 6200 syrphids are currently known and uncovering their phylogeny will help us to understand how these species have diversified, providing insight into an array of ecological processes, from the development of adult mimicry, the origin of adult migration, to pollination patterns and the evolution of larval resource utilization. We present the first use of anchored hybrid enrichment in insect phylogenetics on a dataset containing 30 flower fly species from across all four subfamilies and 11 tribes out of 15. To produce a phylogenetic hypothesis, 559 loci were sampled to produce a final dataset containing 217,702 sites. We recovered a well resolved topology with bootstrap support values that were almost universally >95 %. The subfamily Eristalinae is recovered as paraphyletic, with the strongest support for this hypothesis to date. The ant predators in the Microdontinae are sister to all other syrphids. Syrphinae and Pipizinae are monophyletic and sister to each other. Larval predation on soft-bodied hemipterans evolved only once in this family. Anchored hybrid enrichment was successful in producing a robustly supported phylogenetic hypothesis for the syrphids. Subfamilial reconstruction is concordant with recent phylogenetic hypotheses, but with much higher support values. With the newly designed probe kit this analysis could be rapidly expanded with further sampling, opening the door to more comprehensive analyses targeting problem areas in syrphid phylogenetics and ecology.
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Date Issued: 2016-06-29
Identifier: FSU_pmch_27357120, 10.1186/s12862-016-0714-0, PMC4928351, 27357120, 27357120, 10.1186/s12862-016-0714-0
Format: Citation

Title: Spatial and Temporal Variation in the Effects of Climatic Variables on Dugong Calf Production.
Creator: Fuentes, Mariana M P B, Delean, Steven, Grayson, Jillian, Lavender, Sally, Logan, Murray, Marsh, Helene
Abstract/Description: Knowledge of the relationships between environmental forcing and demographic parameters is important for predicting responses from climatic changes and to manage populations effectively. We explore the relationships between the proportion of sea cows (Dugong dugon) classified as calves and four climatic drivers (rainfall anomaly, Southern Oscillation El Niño Index [SOI], NINO 3.4 sea surface temperature index, and number of tropical cyclones) at a range of spatially distinct locations in...
Show moreKnowledge of the relationships between environmental forcing and demographic parameters is important for predicting responses from climatic changes and to manage populations effectively. We explore the relationships between the proportion of sea cows (Dugong dugon) classified as calves and four climatic drivers (rainfall anomaly, Southern Oscillation El Niño Index [SOI], NINO 3.4 sea surface temperature index, and number of tropical cyclones) at a range of spatially distinct locations in Queensland, Australia, a region with relatively high dugong density. Dugong and calf data were obtained from standardized aerial surveys conducted along the study region. A range of lagged versions of each of the focal climatic drivers (1 to 4 years) were included in a global model containing the proportion of calves in each population crossed with each of the lagged versions of the climatic drivers to explore relationships. The relative influence of each predictor was estimated via Gibbs variable selection. The relationships between the proportion of dependent calves and the climatic drivers varied spatially and temporally, with climatic drivers influencing calf counts at sub-regional scales. Thus we recommend that the assessment of and management response to indirect climatic threats on dugongs should also occur at sub-regional scales.
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Date Issued: 2016-06-29
Identifier: FSU_pmch_27355367, 10.1371/journal.pone.0155675, PMC4927176, 27355367, 27355367, PONE-D-15-52097
Format: Citation

Title: Two Obese Patients with Presumptive Diagnosis of Anaphylactoid Syndrome of Pregnancy Presenting at a Community Hospital.
Creator: Kradel, Brian K, Hinson, Scarlett B, Smith, Carr J
Abstract/Description: Anaphylactoid syndrome of pregnancy (ASP) is a rare but extremely serious complication, with an estimated incidence in North America of 1 in 15 200 deliveries. Despite its rarity, ASP is responsible for approximately 10% of all childbirth-associated deaths in the United States. At present, there is no validated biomarker or specific set of risk factors sufficiently predictive of ASP risk to incorporate into clinical practice. Toward the goal of developing a methodology predictive of an...
Show moreAnaphylactoid syndrome of pregnancy (ASP) is a rare but extremely serious complication, with an estimated incidence in North America of 1 in 15 200 deliveries. Despite its rarity, ASP is responsible for approximately 10% of all childbirth-associated deaths in the United States. At present, there is no validated biomarker or specific set of risk factors sufficiently predictive of ASP risk to incorporate into clinical practice. Toward the goal of developing a methodology predictive of an impending ASP event for use by obstetricians, anesthesiologists, and other practitioners participating in infant deliveries, physicians encountering an ASP event have been encouraged to report the occurrence of a case and its biologically plausible risk factors. Herein, we report on 2 patients who presented with a presumptive diagnosis of ASP to the delivery unit of a community hospital. Patient One was a 21-year-old, obese (5'11" tall, 250 lbs., BMI 34.9) white female, 1 pregnancy, no live births (G1P0), estimated gestational age (EGA) 40.2 weeks. Patient Two was a 29-year-old, obese (5'7" tall, 307 lbs., BMI 48.1) Hispanic female, second pregnancy, with 1 previous live birth via C-section (G2P1-0-0-1). Her pregnancy was at gestational age 38 weeks plus 2 days. Patient One had 2 possible risk factors: administration of Pitocin to induce labor and post-coital spotting from recent intercourse. Patient Two suffered premature rupture of the placental membranes. Both Patient One and Patient Two had very high body mass indices (BMIs), at the 97th and 99th percentiles, respectively. In the relatively few cases of anaphylactoid syndrome of pregnancy described to date, this is the first report of a possible association with high BMI.
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Date Issued: 2016-07-01
Identifier: FSU_pmch_27363628, PMC4933560, 27363628, 27363628, 897984
Format: Citation

Title: Historical baselines and the future of shell calcification for a foundation species in a changing ocean.
Creator: Pfister, Catherine A, Roy, Kaustuv, Wootton, J Timothy, McCoy, Sophie J, Paine, Robert T, Suchanek, Thomas H, Sanford, Eric
Abstract/Description: Seawater pH and the availability of carbonate ions are decreasing due to anthropogenic carbon dioxide emissions, posing challenges for calcifying marine species. Marine mussels are of particular concern given their role as foundation species worldwide. Here, we document shell growth and calcification patterns in Mytilus californianus, the California mussel, over millennial and decadal scales. By comparing shell thickness across the largest modern shells, the largest mussels collected in the...
Show moreSeawater pH and the availability of carbonate ions are decreasing due to anthropogenic carbon dioxide emissions, posing challenges for calcifying marine species. Marine mussels are of particular concern given their role as foundation species worldwide. Here, we document shell growth and calcification patterns in Mytilus californianus, the California mussel, over millennial and decadal scales. By comparing shell thickness across the largest modern shells, the largest mussels collected in the 1960s-1970s and shells from two Native American midden sites (∼1000-2420 years BP), we found that modern shells are thinner overall, thinner per age category and thinner per unit length. Thus, the largest individuals of this species are calcifying less now than in the past. Comparisons of shell thickness in smaller individuals over the past 10-40 years, however, do not show significant shell thinning. Given our sampling strategy, these results are unlikely to simply reflect within-site variability or preservation effects. Review of environmental and biotic drivers known to affect shell calcification suggests declining ocean pH as a likely explanation for the observed shell thinning. Further future decreases in shell thickness could have significant negative impacts on M. californianus survival and, in turn, negatively impact the species-rich complex that occupies mussel beds.
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Date Issued: 2016-06-15
Identifier: FSU_pmch_27306049, 10.1098/rspb.2016.0392, PMC4920315, 27306049, 27306049, rspb.2016.0392
Format: Citation

Title: Predictive Computer Models for Biofilm Detachment Properties in Pseudomonas aeruginosa.
Creator: Cogan, Nick G, Harro, Janette M, Stoodley, Paul, Shirtliff, Mark E
Abstract/Description: Microbial biofilm communities are protected against environmental extremes or clearance by antimicrobial agents or the host immune response. They also serve as a site from which microbial populations search for new niches by dispersion via single planktonic cells or by detachment by protected biofilm aggregates that, until recently, were thought to become single cells ready for attachment. Mathematically modeling these events has provided investigators with testable hypotheses for further...
Show moreMicrobial biofilm communities are protected against environmental extremes or clearance by antimicrobial agents or the host immune response. They also serve as a site from which microbial populations search for new niches by dispersion via single planktonic cells or by detachment by protected biofilm aggregates that, until recently, were thought to become single cells ready for attachment. Mathematically modeling these events has provided investigators with testable hypotheses for further study. Such was the case in the recent article by Kragh et al. (K. N. Kragh, J. B. Hutchison, G. Melaugh, C. Rodesney, A. E. Roberts, Y. Irie, P. Ø. Jensen, S. P. Diggle, R. J. Allen, V. Gordon, and T. Bjarnsholt, mBio 7:e00237-16, 2016, http://dx.doi.org/10.1128/mBio.00237-16), in which investigators were able to identify the differential competitive advantage of biofilm aggregates to directly attach to surfaces compared to the single-celled planktonic populations. Therefore, as we delve deeper into the properties of the biofilm mode of growth, not only do we need to understand the complexity of biofilms, but we must also account for the properties of the dispersed and detached populations and their effect on reseeding.
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Date Issued: 2016-06-14
Identifier: FSU_pmch_27302761, 10.1128/mBio.00815-16, PMC4916383, 27302761, 27302761, mBio.00815-16
Format: Citation

Title: Cocaine-induced neurodevelopmental deficits and underlying mechanisms.
Creator: Martin, Melissa M, Graham, Devon L, McCarthy, Deirdre M, Bhide, Pradeep G, Stanwood, Gregg D
Abstract/Description: Exposure to drugs early in life has complex and long-lasting implications for brain structure and function. This review summarizes work to date on the immediate and long-term effects of prenatal exposure to cocaine. In utero cocaine exposure produces disruptions in brain monoamines, particularly dopamine, during sensitive periods of brain development, and leads to permanent changes in specific brain circuits, molecules, and behavior. Here, we integrate clinical studies and significance with...
Show moreExposure to drugs early in life has complex and long-lasting implications for brain structure and function. This review summarizes work to date on the immediate and long-term effects of prenatal exposure to cocaine. In utero cocaine exposure produces disruptions in brain monoamines, particularly dopamine, during sensitive periods of brain development, and leads to permanent changes in specific brain circuits, molecules, and behavior. Here, we integrate clinical studies and significance with mechanistic preclinical studies, to define our current knowledge base and identify gaps for future investigation. Birth Defects Research (Part C) 108:147-173, 2016. © 2016 Wiley Periodicals, Inc.
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Date Issued: 2016-06-01
Identifier: FSU_pmch_27345015, 10.1002/bdrc.21132, PMC5538582, 27345015, 27345015
Format: Citation

Title: Prediction of individual differences in fear response by novelty seeking, and disruption of contextual fear memory reconsolidation by ketamine.
Creator: Duclot, Florian, Perez-Taboada, Iara, Wright, Katherine N, Kabbaj, Mohamed
Abstract/Description: Only a portion of the population exposed to trauma will develop persistent emotional alterations characteristic of posttraumatic stress disorder (PTSD), which illustrates the necessity for identifying vulnerability factors and novel pharmacotherapeutic alternatives. Interestingly, clinical evidence suggests that novelty seeking is a good predictor for vulnerability to the development of excessive and persistent fear. Here, we first tested this hypothesis by analyzing contextual and cued fear...
Show moreOnly a portion of the population exposed to trauma will develop persistent emotional alterations characteristic of posttraumatic stress disorder (PTSD), which illustrates the necessity for identifying vulnerability factors and novel pharmacotherapeutic alternatives. Interestingly, clinical evidence suggests that novelty seeking is a good predictor for vulnerability to the development of excessive and persistent fear. Here, we first tested this hypothesis by analyzing contextual and cued fear responses of rats selected for their high (high responders, HR) or low (low responders, LR) exploration of a novel environment, indicator of novelty seeking. While HR and LR rats exhibited similar sensitivity to the shock and cued fear memory retention, fewer extinction sessions were required in HR than LR animals to reach extinction, indicating faster contextual and cued memory extinction. In a second part, we found an effective disruption of contextual fear reconsolidation by the N-methyl-d-aspartate receptor antagonist ketamine, associated with a down-regulation of early growth response 1 (Egr1) in the hippocampal CA1 area, and up-regulation of brain-derived neurotrophic factor (Bdnf) mRNA levels in the prelimbic and infralimbic cortices. Altogether, these data demonstrate a link between novelty seeking and conditioned fear extinction, and highlight a promising novel role of ketamine in affecting established fear memory.
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Date Issued: 2016-10-01
Identifier: FSU_pmch_27343386, 10.1016/j.neuropharm.2016.06.022, PMC5017153, 27343386, 27343386, S0028-3908(16)30275-1
Format: Citation

Title: Critical and direct involvement of the CD23 stalk region in IgE binding.
Creator: Selb, Regina, Eckl-Dorna, Julia, Twaroch, Teresa E, Lupinek, Christian, Teufelberger, Andrea, Hofer, Gerhard, Focke-Tejkl, Margarete, Gepp, Barbara, Linhart, Birgit, Breiteneder...
Show moreSelb, Regina, Eckl-Dorna, Julia, Twaroch, Teresa E, Lupinek, Christian, Teufelberger, Andrea, Hofer, Gerhard, Focke-Tejkl, Margarete, Gepp, Barbara, Linhart, Birgit, Breiteneder, Heimo, Ellinger, Adolf, Keller, Walter, Roux, Kenneth H, Valenta, Rudolf, Niederberger, Verena
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Abstract/Description: The low-affinity receptor for IgE, FcεRII (CD23), contributes to allergic inflammation through allergen presentation to T cells, regulation of IgE responses, and enhancement of transepithelial allergen migration. We sought to investigate the interaction between CD23, chimeric monoclonal human IgE, and the corresponding birch pollen allergen Bet v 1 at a molecular level. We expressed 4 CD23 variants. One variant comprised the full extracellular portion of CD23, including the stalk and head...
Show moreThe low-affinity receptor for IgE, FcεRII (CD23), contributes to allergic inflammation through allergen presentation to T cells, regulation of IgE responses, and enhancement of transepithelial allergen migration. We sought to investigate the interaction between CD23, chimeric monoclonal human IgE, and the corresponding birch pollen allergen Bet v 1 at a molecular level. We expressed 4 CD23 variants. One variant comprised the full extracellular portion of CD23, including the stalk and head domain; 1 variant was identical with the first, except for an amino acid exchange in the stalk region abolishing the N-linked glycosylation site; and 2 variants represented the head domain, 1 complete and 1 truncated. The 4 CD23 variants were purified as monomeric and structurally folded proteins, as demonstrated by gel filtration and circular dichroism. By using a human IgE mAb, the corresponding allergen Bet v 1, and a panel of antibodies specific for peptides spanning the CD23 surface, both binding and inhibition assays and negative stain electron microscopy were performed. A hitherto unknown IgE-binding site was mapped on the stalk region of CD23, and the non-N-glycosylated monomeric version of CD23 was superior in IgE binding compared with glycosylated CD23. Furthermore, we demonstrated that a therapeutic anti-IgE antibody, omalizumab, which inhibits IgE binding to FcεRI, also inhibited IgE binding to CD23. Our results provide a new model for the CD23-IgE interaction. We show that the stalk region of CD23 is crucially involved in IgE binding and that the interaction can be blocked by the therapeutic anti-IgE antibody omalizumab.
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Date Issued: 2017-01-01
Identifier: FSU_pmch_27343203, 10.1016/j.jaci.2016.04.015, PMC5321597, 27343203, 27343203, S0091-6749(16)30261-5
Format: Citation

Title: Function of Succinoglycan Polysaccharide in Sinorhizobium meliloti Host Plant Invasion Depends on Succinylation, Not Molecular Weight.
Creator: Mendis, Hajeewaka C, Madzima, Thelma F, Queiroux, Clothilde, Jones, Kathryn M
Abstract/Description: The acidic polysaccharide succinoglycan produced by the rhizobial symbiont Sinorhizobium meliloti 1021 is required for this bacterium to invade the host plant Medicago truncatula and establish a nitrogen-fixing symbiosis. S. meliloti mutants that cannot make succinoglycan cannot initiate invasion structures called infection threads in plant root hairs. S. meliloti exoH mutants that cannot succinylate succinoglycan are also unable to form infection threads, despite the fact that they make...
Show moreThe acidic polysaccharide succinoglycan produced by the rhizobial symbiont Sinorhizobium meliloti 1021 is required for this bacterium to invade the host plant Medicago truncatula and establish a nitrogen-fixing symbiosis. S. meliloti mutants that cannot make succinoglycan cannot initiate invasion structures called infection threads in plant root hairs. S. meliloti exoH mutants that cannot succinylate succinoglycan are also unable to form infection threads, despite the fact that they make large quantities of succinoglycan. Succinoglycan produced by exoH mutants is refractory to cleavage by the glycanases encoded by exoK and exsH, and thus succinoglycan produced by exoH mutants is made only in the high-molecular-weight (HMW) form. One interpretation of the symbiotic defect of exoH mutants is that the low-molecular-weight (LMW) form of succinoglycan is required for infection thread formation. However, our data demonstrate that production of the HMW form of succinoglycan by S. meliloti 1021 is sufficient for invasion of the host M. truncatula and that the LMW form is not required. Here, we show that S. meliloti strains deficient in the exoK- and exsH-encoded glycanases invade M. truncatula and form a productive symbiosis, although they do this with somewhat less efficiency than the wild type. We have also characterized the polysaccharides produced by these double glycanase mutants and determined that they consist of only HMW succinoglycan and no detectable LMW succinoglycan. This demonstrates that LMW succinoglycan is not required for host invasion. These results suggest succinoglycan function is not dependent upon the presence of a small, readily diffusible form. Sinorhizobium meliloti is a bacterium that forms a beneficial symbiosis with legume host plants. S. meliloti and other rhizobia convert atmospheric nitrogen to ammonia, a nutrient source for the host plant. To establish the symbiosis, rhizobia must invade plant roots, supplying the proper signals to prevent a plant immune response during invasion. A polysaccharide, succinoglycan, produced by S. meliloti is required for successful invasion. Here, we show that the critical feature of succinoglycan that allows infection to proceed is the attachment of a "succinyl" chemical group and that the chain length of succinoglycan is much less important for its function. We also show that none of the short-chain versions of succinoglycan is produced in the absence of two chain-cleaving enzymes.
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Date Issued: 2016-06-21
Identifier: FSU_pmch_27329751, 10.1128/mBio.00606-16, PMC4916376, 27329751, 27329751, mBio.00606-16
Format: Citation

Title: GABAergic mechanisms contributing to categorical amygdala responses to chemosensory signals.
Creator: Westberry, Jenne M, Meredith, Michael
Abstract/Description: Chemosensory stimuli from conspecific and heterospecific animals, elicit categorically different immediate-early gene response-patterns in medial amygdala in male hamsters and mice. We previously showed that conspecific signals activate posterior (MeP) as well as anterior medial amygdala (MeA), and especially relevant heterospecific signals such as chemosensory stimuli from potential predators also activate MeP in mice. Other heterospecific chemosignals activate MeA, but not MeP. Here we show...
Show moreChemosensory stimuli from conspecific and heterospecific animals, elicit categorically different immediate-early gene response-patterns in medial amygdala in male hamsters and mice. We previously showed that conspecific signals activate posterior (MeP) as well as anterior medial amygdala (MeA), and especially relevant heterospecific signals such as chemosensory stimuli from potential predators also activate MeP in mice. Other heterospecific chemosignals activate MeA, but not MeP. Here we show that male hamster amygdala responds significantly differentially to different conspecific signals, by activating different proportions of cells of different phenotype, possibly leading to differential activation of downstream circuits. Heterospecific signals that fail to activate MeP do activate GABA-immunoreactive cells in the adjacent caudal main intercalated nucleus (mICNc) and elicit selective suppression of MeP cells bearing GABA-Receptors, suggesting GABA inhibition in MeP by GABAergic cells in mICNc. Overall, work presented here suggests that medial amygdala may discriminate between important conspecific social signals, distinguish them from the social signals of other species and convey that information to brain circuits eliciting appropriate social behavior.
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Date Issued: 2016-09-07
Identifier: FSU_pmch_27329335, 10.1016/j.neuroscience.2016.06.020, PMC4955787, 27329335, 27329335, S0306-4522(16)30250-0
Format: Citation

Title: Region and strain-dependent diffusivities of glucose and lactate in healthy human cartilage endplate.
Creator: Wu, Yongren, Cisewski, Sarah E, Wegner, Nicholas, Zhao, Shichang, Pellegrini, Vincent D, Slate, Elizabeth H, Yao, Hai
Abstract/Description: The cartilage endplate (CEP) is implicated as the main pathway of nutrient supply to the healthy human intervertebral disc (IVD). In this study, the diffusivities of nutrient/metabolite solutes in healthy CEP were assessed, and further correlated with tissue biochemical composition and structure. The CEPs from non-degenerated human IVD were divided into four regions: central, lateral, anterior, and posterior. The diffusivities of glucose and lactate were measured with a custom diffusion cell...
Show moreThe cartilage endplate (CEP) is implicated as the main pathway of nutrient supply to the healthy human intervertebral disc (IVD). In this study, the diffusivities of nutrient/metabolite solutes in healthy CEP were assessed, and further correlated with tissue biochemical composition and structure. The CEPs from non-degenerated human IVD were divided into four regions: central, lateral, anterior, and posterior. The diffusivities of glucose and lactate were measured with a custom diffusion cell apparatus under 0%, 10%, and 20% compressive strains. Biochemical assays were conducted to quantify the water and glycosaminoglycan (GAG) contents. The Safranin-O and Ehrlich׳s hematoxylin and eosin staining and scanning electron microscopy (SEM) were performed to reveal the tissue structure of the CEP. Average diffusivities of glucose and lactate in healthy CEP were 2.68±0.93×10cm/s and 4.52±1.47×10cm/s, respectively. Solute diffusivities were region-dependent (p<0.0001) with the highest values in the central region, and mechanical strains impeded solute diffusion in the CEP (p<0.0001). The solute diffusivities were significantly correlated with the tissue porosities (glucose: p<0.0001, r=0.581; lactate: p<0.0001, r=0.534). Histological and SEM studies further revealed that the collagen fibers in healthy CEP are more compacted than those in the nucleus pulposus (NP) and annulus fibrosus (AF) and show no clear orientation. Compared to human AF and NP, much smaller solute diffusivities in human CEP suggested that it acts as a gateway for solute diffusion through the disc, maintaining the balance of nutritional environment in healthy human disc under mechanical loading and preventing the progression of disc degeneration.
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Date Issued: 2016-09-06
Identifier: FSU_pmch_27338525, 10.1016/j.jbiomech.2016.06.008, PMC5056135, 27338525, 27338525, S0021-9290(16)30664-9
Format: Citation

Title: Retinopathy and Uveitis Associated with Sofosbuvir Therapy for Chronic Hepatitis C Infection.
Creator: Chin-Loy, Katrina, Galaydh, Farah, Shaikh, Saad
Abstract/Description: We report a case of retinopathy and uveitis associated with sofosbuvir therapy for hepatitis C infection. Case report. A 57-year-old-male developed ocular inflammation and retinopathy four weeks after the administration of sofosbuvir for a hepatitis C infection. Hearing loss, rheumatologic disease, and essential tremor were also noted. The ophthalmic findings resolved with discontinuation of the drug. The authors report a case of sofosbuvir induced retinopathy and uveitis, the first...
Show moreWe report a case of retinopathy and uveitis associated with sofosbuvir therapy for hepatitis C infection. Case report. A 57-year-old-male developed ocular inflammation and retinopathy four weeks after the administration of sofosbuvir for a hepatitis C infection. Hearing loss, rheumatologic disease, and essential tremor were also noted. The ophthalmic findings resolved with discontinuation of the drug. The authors report a case of sofosbuvir induced retinopathy and uveitis, the first associated with this emerging therapy for hepatitis C. Ophthalmologists and other treating physicians should be aware of the ophthalmic side effects of this drug.
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Date Issued: 2016-05-03
Identifier: FSU_pmch_27335709, 10.7759/cureus.597, PMC4895080, 27335709, 27335709
Format: Citation

Title: Small caliber covered self-expanding metal stents in the management of malignant dysphagia.
Creator: Kucera, Stephen, Barthel, James, Klapman, Jason, Shridhar, Ravi, Hoffe, Sarah, Harris, Cynthia, Almhanna, Khaldoun, Meredith, Kenneth
Abstract/Description: Use of large caliber [≥18 mm body diameter (BD)] self-expanding metal stents (SEMS) for management of malignant dysphasia is associated with substantial adverse event (AE) and mortality rates (MRs). We sought to determine dysphagia response, stent migration rates, and AE and MRs, for small caliber covered SEMS (sccSEMS) with BDs between 10-16 mm in malignant dysphagia. Thirty-one patients underwent direct endoscopic placement of 50 sccSEMS between January 2008 and March 2011. Patients were...
Show moreUse of large caliber [≥18 mm body diameter (BD)] self-expanding metal stents (SEMS) for management of malignant dysphasia is associated with substantial adverse event (AE) and mortality rates (MRs). We sought to determine dysphagia response, stent migration rates, and AE and MRs, for small caliber covered SEMS (sccSEMS) with BDs between 10-16 mm in malignant dysphagia. Thirty-one patients underwent direct endoscopic placement of 50 sccSEMS between January 2008 and March 2011. Patients were monitored for change in dysphagia score (DS), stent migration, AEs, and death through May 2011. DS improved in 30 of 31 patients (97%). The median DS decreased from 3 to 2 (P<0.0001). The median effective duration of first sccSEMS placement was 116 (95% CI: 75-196) days. Major and minor AE rates were 6.5% and 19.4% respectively. No stent related deaths were encountered. The overall migration rate was 36% (18/50). The anticipated migration rate was 45.7% (16/35) and the unanticipated migration rate was 13.3% (2/15) (P=0.052). Positive effective clinical outcome occurred in 93.5% (29/31) of cases. In malignant dysphagia, direct endoscopic sccSEMS placement provided acceptable dysphagia control and migration rates with substantial reductions in stent related AEs and MRs compared to those reported for large caliber SEMS.
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Date Issued: 2016-06-01
Identifier: FSU_pmch_27284474, 10.21037/jgo.2015.12.03, PMC4880758, 27284474, 27284474, jgo-07-03-411
Format: Citation

Title: Collective epithelial cell sheet adhesion and migration on polyelectrolyte multilayers with uniform and gradients of compliance.
Creator: Martinez, Jessica S, Schlenoff, Joseph B, Keller, Thomas C S
Abstract/Description: Polyelectrolyte multilayers (PEMUs) are tunable thin films that could serve as coatings for biomedical implants. PEMUs built layer by layer with the polyanion poly(acrylic acid) (PAA) modified with a photosensitive 4-(2-hydroxyethoxy) benzophenone (PAABp) group and the polycation poly(allylamine hydrochloride) (PAH) are mechanically tunable by UV irradiation, which forms covalent bonds between the layers and increases PEMU stiffness. PAH-terminated PEMUs (PAH-PEMUs) that were uncrosslinked,...
Show morePolyelectrolyte multilayers (PEMUs) are tunable thin films that could serve as coatings for biomedical implants. PEMUs built layer by layer with the polyanion poly(acrylic acid) (PAA) modified with a photosensitive 4-(2-hydroxyethoxy) benzophenone (PAABp) group and the polycation poly(allylamine hydrochloride) (PAH) are mechanically tunable by UV irradiation, which forms covalent bonds between the layers and increases PEMU stiffness. PAH-terminated PEMUs (PAH-PEMUs) that were uncrosslinked, UV-crosslinked to a uniform stiffness, or UV-crosslinked with an edge mask or through a neutral density optical gradient filter to form continuous compliance gradients were used to investigate how differences in PEMU stiffness affect the adhesion and migration of epithelial cell sheets from scales of the fish Poecilia sphenops (Black Molly) and Carassius auratus (Comet Goldfish). During the progressive collective cell migration, the edge cells (also known as 'leader' cells) in the sheets on softer uncrosslinked PEMUs and less crosslinked regions of the gradient formed more actin filaments and vinculin-containing adherens junctions and focal adhesions than formed in the sheet cells on stiffer PEMUs or glass. During sheet migration, the ratio of edge cell to internal cell (also known as 'follower' cells) motilities were greater on the softer PEMUs than on the stiffer PEMUs or glass, causing tension to develop across the sheet and periods of retraction, during which the edge cells lost adhesion to the substrate and regions of the sheet retracted toward the more adherent internal cell region. These retraction events were inhibited by the myosin II inhibitor Blebbistatin, which reduced the motility velocity ratios to those for sheets on the stiffer PEMUs. Blebbistatin also caused disassembly of actin filaments, reorganization of focal adhesions, increased cell spreading at the leading edge, as well as loss of edge cell-cell connections in epithelial cell sheets on all surfaces. Interestingly, cells throughout the interior region of the sheets on uncrosslinked PEMUs retained their actin and vinculin organization at adherens junctions after treatment with Blebbistatin. Like Blebbistatin, a Rho-kinase (ROCK) inhibitor, Y27632, promoted loss of cell-cell connections between edge cells, whereas a Rac1 inhibitor, NSC23766, primarily altered the lamellipodial protrusion in edge cells. Compliance gradient PAH-PEMUs promoted durotaxis of the cell sheets but not of individual keratocytes, demonstrating durotaxis, like plithotaxis, is an emergent property of cell sheet organization.
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Date Issued: 2016-08-01
Identifier: FSU_pmch_27292313, 10.1016/j.yexcr.2016.06.002, PMC4967014, 27292313, 27292313, S0014-4827(16)30143-4
Format: Citation

Title: Crystallization of spin superlattices with pressure and field in the layered magnet SrCu2(BO3)2.
Creator: Haravifard, S, Graf, D, Feiguin, A E, Batista, C D, Lang, J C, Silevitch, D M, Srajer, G, Gaulin, B D, Dabkowska, H A, Rosenbaum, T F
Abstract/Description: An exact mapping between quantum spins and boson gases provides fresh approaches to the creation of quantum condensates and crystals. Here we report on magnetization measurements on the dimerized quantum magnet SrCu2(BO3)2 at cryogenic temperatures and through a quantum-phase transition that demonstrate the emergence of fractionally filled bosonic crystals in mesoscopic patterns, specified by a sequence of magnetization plateaus. We apply tens of Teslas of magnetic field to tune the density...
Show moreAn exact mapping between quantum spins and boson gases provides fresh approaches to the creation of quantum condensates and crystals. Here we report on magnetization measurements on the dimerized quantum magnet SrCu2(BO3)2 at cryogenic temperatures and through a quantum-phase transition that demonstrate the emergence of fractionally filled bosonic crystals in mesoscopic patterns, specified by a sequence of magnetization plateaus. We apply tens of Teslas of magnetic field to tune the density of bosons and gigapascals of hydrostatic pressure to regulate the underlying interactions. Simulations help parse the balance between energy and geometry in the emergent spin superlattices. The magnetic crystallites are the end result of a progression from a direct product of singlet states in each short dimer at zero field to preferred filling fractions of spin-triplet bosons in each dimer at large magnetic field, enriching the known possibilities for collective states in both quantum spin and atomic systems.
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Date Issued: 2016-06-20
Identifier: FSU_pmch_27320787, 10.1038/ncomms11956, PMC4915149, 27320787, 27320787, ncomms11956
Format: Citation

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