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Wayne Chen

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https://www.readbyqxmd.com/read/27909053/endoplasmic-reticulum-stress-and-ca2-depletion-differentially-modulate-the-sterol-regulatory-protein-pcsk9-to-control-lipid-metabolism
#1
Paul Lebeau, Ali Al-Hashimi, Sudesh Sood, Sarka Lhotak, Pei Yu, Gabriel Gyulay, Guillaume Pare, S R Wayne Chen, Bernardo Trigatti, Annik Prat, Nabil Seidah, Richard C Austin
Accumulating evidence implicates endoplasmic reticulum (ER) stress as a mediator of impaired lipid metabolism, thereby contributing to fatty liver disease and atherosclerosis. Previous studies demonstrated that ER stress can activate the sterol regulatory element-binding protein-2 (SREBP2), an ER localized transcription factor that directly upregulates sterol-regulatory genes, including PCSK9. Given that PCSK9 contributes to atherosclerosis by targeting low-density lipoprotein (LDL) receptor (LDLR) degradation, our present study investigates a novel mechanism by which ER stress plays a role in lipid metabolism by examining its ability to modulate PCSK9 expression...
December 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27888635/lncrnas-the-bridge-linking-rna-and-colorectal-cancer
#2
Yanfei Yang, Linjie Zhao, Lingzi Lei, Wayne Bond Lau, Bonnie Lau, Qilian Yang, Xiaobing Le, Huiliang Yang, Chenlu Wang, Zhongyue Luo, Yu Xuan, Yi Chen, Xiangbing Deng, Lian Xu, Min Feng, Tao Yi, Xia Zhao, Yuquan Wei, Shengtao Zhou
Long noncoding RNAs (lncRNAs) are transcribed by genomic regions (exceeding 200 nucleotides in length) that do not encode proteins. While the exquisite regulation of lncRNA transcription can provide signals of malignant transformation, lncRNAs control pleiotropic cancer phenotypes through interactions with other cellular molecules including DNA, protein, and RNA. Recent studies have demonstrated that dysregulation of lncRNAs is influential in proliferation, angiogenesis, metastasis, invasion, apoptosis, stemness, and genome instability in colorectal cancer (CRC), with consequent clinical implications...
November 24, 2016: Oncotarget
https://www.readbyqxmd.com/read/27843095/branched-chain-amino-acids-cause-liver-injury-in-obese-diabetic-mice-by-promoting-adipocyte-lipolysis-and-inhibiting-hepatic-autophagy
#3
Fuyang Zhang, Shihao Zhao, Wenjun Yan, Yunlong Xia, Xiyao Chen, Wei Wang, Jinglong Zhang, Chao Gao, Cheng Peng, Feng Yan, Huishou Zhao, Kun Lian, Yan Lee, Ling Zhang, Wayne Bond Lau, Xinliang Ma, Ling Tao
The Western meat-rich diet is both high in protein and fat. Although the hazardous effect of a high fat diet (HFD) upon liver structure and function is well recognized, whether the co-presence of high protein intake contributes to, or protects against, HF-induced hepatic injury remains unclear. Increased intake of branched chain amino acids (BCAA, essential amino acids compromising 20% of total protein intake) reduces body weight. However, elevated circulating BCAA is associated with non-alcoholic fatty liver disease and injury...
October 11, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27818320/suppression-of-function-mutations-in-the-cardiac-ryanodine-receptor-emerging-evidence-for-a-novel-arrhythmia-syndrome
#4
EDITORIAL
Thomas M Roston, Shubhayan Sanatani, S R Wayne Chen
No abstract text is available yet for this article.
November 3, 2016: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/27789712/the-cytoplasmic-region-of-inner-helix-s6-is-an-important-determinant-of-cardiac-ryanodine-receptor-channel-gating
#5
Bo Sun, Wenting Guo, Xixi Tian, Jinjing Yao, Lin Zhang, Ruiwu Wang, S R Wayne Chen
The ryanodine receptor (RyR) channel pore is formed by four S6 inner helices with its intracellular gate located at the S6 helix bundle crossing region. The cytoplasmic region of the extended S6 helix is held by the U-motif of the Central domain, and is thought to control the opening and closing of the S6 helix bundle. However, the functional significance of the S6 cytoplasmic region in channel gating is unknown. Here we assessed the role of the S6 cytoplasmic region in the function of cardiac RyR (RyR2) via structure-guided site-directed mutagenesis...
October 27, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27733687/enhanced-cytosolic-ca2-activation-underlies-a-common-defect-of-central-domain-cardiac-ryanodine-receptor-mutations-linked-to-arrhythmias
#6
Zhichao Xiao, Wenting Guo, Bo Sun, Donald J Hunt, Jinhong Wei, Yingjie Liu, Yundi Wang, Ruiwu Wang, Peter P Jones, Thomas G Back, S R Wayne Chen
Recent three-dimensional structural studies reveal that the central domain of ryanodine receptor (RyR) serves as a transducer that converts long-range conformational changes into the gating of the channel pore. Interestingly, the central domain encompasses one of the mutation hotspots (corresponding to amino acid residues 3778-4201) that contains a number of cardiac RyR (RyR2) mutations associated with catecholaminergic polymorphic ventricular tachycardia (CPVT) and atrial fibrillation (AF). However, the functional consequences of these central domain RyR2 mutations are not well understood...
November 18, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27708056/structural-basis-for-the-gating-mechanism-of-the-type-2-ryanodine-receptor-ryr2
#7
Wei Peng, Huaizong Shen, Jianping Wu, Wenting Guo, Xiaojing Pan, Ruiwu Wang, S R Wayne Chen, Nieng Yan
RyR2 is a high-conductance intracellular calcium (Ca(2+)) channel that controls the release of Ca(2+) from the sarco(endo)plasmic reticulum of a variety of cells. Here, we report the structures of RyR2 from porcine heart in both the open and closed states at near-atomic resolutions determined using single-particle electron cryomicroscopy. Structural comparison reveals a breathing motion of the overall cytoplasmic region resulted from the interdomain movements of amino-terminal domains (NTDs), Helical domains, and Handle domains, whereas almost no intradomain shifts are observed in these armadillo repeats-containing domains...
October 21, 2016: Science
https://www.readbyqxmd.com/read/27694991/novel-genetic-loci-underlying-human-intracranial-volume-identified-through-genome-wide-association
#8
Hieab H H Adams, Derrek P Hibar, Vincent Chouraki, Jason L Stein, Paul A Nyquist, Miguel E Rentería, Stella Trompet, Alejandro Arias-Vasquez, Sudha Seshadri, Sylvane Desrivières, Ashley H Beecham, Neda Jahanshad, Katharina Wittfeld, Sven J Van der Lee, Lucija Abramovic, Saud Alhusaini, Najaf Amin, Micael Andersson, Konstantinos Arfanakis, Benjamin S Aribisala, Nicola J Armstrong, Lavinia Athanasiu, Tomas Axelsson, Alexa Beiser, Manon Bernard, Joshua C Bis, Laura M E Blanken, Susan H Blanton, Marc M Bohlken, Marco P Boks, Janita Bralten, Adam M Brickman, Owen Carmichael, M Mallar Chakravarty, Ganesh Chauhan, Qiang Chen, Christopher R K Ching, Gabriel Cuellar-Partida, Anouk Den Braber, Nhat Trung Doan, Stefan Ehrlich, Irina Filippi, Tian Ge, Sudheer Giddaluru, Aaron L Goldman, Rebecca F Gottesman, Corina U Greven, Oliver Grimm, Michael E Griswold, Tulio Guadalupe, Johanna Hass, Unn K Haukvik, Saima Hilal, Edith Hofer, David Hoehn, Avram J Holmes, Martine Hoogman, Deborah Janowitz, Tianye Jia, Dalia Kasperaviciute, Sungeun Kim, Marieke Klein, Bernd Kraemer, Phil H Lee, Jiemin Liao, David C M Liewald, Lorna M Lopez, Michelle Luciano, Christine Macare, Andre Marquand, Mar Matarin, Karen A Mather, Manuel Mattheisen, Bernard Mazoyer, David R McKay, Rebekah McWhirter, Yuri Milaneschi, Nazanin Mirza-Schreiber, Ryan L Muetzel, Susana Muñoz Maniega, Kwangsik Nho, Allison C Nugent, Loes M Olde Loohuis, Jaap Oosterlaan, Martina Papmeyer, Irene Pappa, Lukas Pirpamer, Sara Pudas, Benno Pütz, Kumar B Rajan, Adaikalavan Ramasamy, Jennifer S Richards, Shannon L Risacher, Roberto Roiz-Santiañez, Nanda Rommelse, Emma J Rose, Natalie A Royle, Tatjana Rundek, Philipp G Sämann, Claudia L Satizabal, Lianne Schmaal, Andrew J Schork, Li Shen, Jean Shin, Elena Shumskaya, Albert V Smith, Emma Sprooten, Lachlan T Strike, Alexander Teumer, Russell Thomson, Diana Tordesillas-Gutierrez, Roberto Toro, Daniah Trabzuni, Dhananjay Vaidya, Jeroen Van der Grond, Dennis Van der Meer, Marjolein M J Van Donkelaar, Kristel R Van Eijk, Theo G M Van Erp, Daan Van Rooij, Esther Walton, Lars T Westlye, Christopher D Whelan, Beverly G Windham, Anderson M Winkler, Girma Woldehawariat, Christiane Wolf, Thomas Wolfers, Bing Xu, Lisa R Yanek, Jingyun Yang, Alex Zijdenbos, Marcel P Zwiers, Ingrid Agartz, Neelum T Aggarwal, Laura Almasy, David Ames, Philippe Amouyel, Ole A Andreassen, Sampath Arepalli, Amelia A Assareh, Sandra Barral, Mark E Bastin, Diane M Becker, James T Becker, David A Bennett, John Blangero, Hans van Bokhoven, Dorret I Boomsma, Henry Brodaty, Rachel M Brouwer, Han G Brunner, Randy L Buckner, Jan K Buitelaar, Kazima B Bulayeva, Wiepke Cahn, Vince D Calhoun, Dara M Cannon, Gianpiero L Cavalleri, Christopher Chen, Ching-Yu Cheng, Sven Cichon, Mark R Cookson, Aiden Corvin, Benedicto Crespo-Facorro, Joanne E Curran, Michael Czisch, Anders M Dale, Gareth E Davies, Eco J C De Geus, Philip L De Jager, Greig I de Zubicaray, Norman Delanty, Chantal Depondt, Anita L DeStefano, Allissa Dillman, Srdjan Djurovic, Gary Donohoe, Wayne C Drevets, Ravi Duggirala, Thomas D Dyer, Susanne Erk, Thomas Espeseth, Denis A Evans, Iryna O Fedko, Guillén Fernández, Luigi Ferrucci, Simon E Fisher, Debra A Fleischman, Ian Ford, Tatiana M Foroud, Peter T Fox, Clyde Francks, Masaki Fukunaga, J Raphael Gibbs, David C Glahn, Randy L Gollub, Harald H H Göring, Hans J Grabe, Robert C Green, Oliver Gruber, Vilmundur Gudnason, Sebastian Guelfi, Narelle K Hansell, John Hardy, Catharina A Hartman, Ryota Hashimoto, Katrin Hegenscheid, Andreas Heinz, Stephanie Le Hellard, Dena G Hernandez, Dirk J Heslenfeld, Beng-Choon Ho, Pieter J Hoekstra, Wolfgang Hoffmann, Albert Hofman, Florian Holsboer, Georg Homuth, Norbert Hosten, Jouke-Jan Hottenga, Hilleke E Hulshoff Pol, Masashi Ikeda, M Kamran Ikram, Clifford R Jack, Mark Jenkinson, Robert Johnson, Erik G Jönsson, J Wouter Jukema, René S Kahn, Ryota Kanai, Iwona Kloszewska, David S Knopman, Peter Kochunov, John B Kwok, Stephen M Lawrie, Hervé Lemaître, Xinmin Liu, Dan L Longo, W T Longstreth, Oscar L Lopez, Simon Lovestone, Oliver Martinez, Jean-Luc Martinot, Venkata S Mattay, Colm McDonald, Andrew M McIntosh, Katie L McMahon, Francis J McMahon, Patrizia Mecocci, Ingrid Melle, Andreas Meyer-Lindenberg, Sebastian Mohnke, Grant W Montgomery, Derek W Morris, Thomas H Mosley, Thomas W Mühleisen, Bertram Müller-Myhsok, Michael A Nalls, Matthias Nauck, Thomas E Nichols, Wiro J Niessen, Markus M Nöthen, Lars Nyberg, Kazutaka Ohi, Rene L Olvera, Roel A Ophoff, Massimo Pandolfo, Tomas Paus, Zdenka Pausova, Brenda W J H Penninx, G Bruce Pike, Steven G Potkin, Bruce M Psaty, Simone Reppermund, Marcella Rietschel, Joshua L Roffman, Nina Romanczuk-Seiferth, Jerome I Rotter, Mina Ryten, Ralph L Sacco, Perminder S Sachdev, Andrew J Saykin, Reinhold Schmidt, Peter R Schofield, Sigurdur Sigurdsson, Andy Simmons, Andrew Singleton, Sanjay M Sisodiya, Colin Smith, Jordan W Smoller, Hilkka Soininen, Velandai Srikanth, Vidar M Steen, David J Stott, Jessika E Sussmann, Anbupalam Thalamuthu, Henning Tiemeier, Arthur W Toga, Bryan J Traynor, Juan Troncoso, Jessica A Turner, Christophe Tzourio, Andre G Uitterlinden, Maria C Valdés Hernández, Marcel Van der Brug, Aad Van der Lugt, Nic J A Van der Wee, Cornelia M Van Duijn, Neeltje E M Van Haren, Dennis Van T Ent, Marie-Jose Van Tol, Badri N Vardarajan, Dick J Veltman, Meike W Vernooij, Henry Völzke, Henrik Walter, Joanna M Wardlaw, Thomas H Wassink, Michael E Weale, Daniel R Weinberger, Michael W Weiner, Wei Wen, Eric Westman, Tonya White, Tien Y Wong, Clinton B Wright, H Ronald Zielke, Alan B Zonderman, Ian J Deary, Charles DeCarli, Helena Schmidt, Nicholas G Martin, Anton J M De Craen, Margaret J Wright, Lenore J Launer, Gunter Schumann, Myriam Fornage, Barbara Franke, Stéphanie Debette, Sarah E Medland, M Arfan Ikram, Paul M Thompson
Intracranial volume reflects the maximally attained brain size during development, and remains stable with loss of tissue in late life. It is highly heritable, but the underlying genes remain largely undetermined. In a genome-wide association study of 32,438 adults, we discovered five previously unknown loci for intracranial volume and confirmed two known signals. Four of the loci were also associated with adult human stature, but these remained associated with intracranial volume after adjusting for height...
December 2016: Nature Neuroscience
https://www.readbyqxmd.com/read/27649879/usefulness-of-atrial-fibrillation-as-a-marker-for-adverse-cardiovascular-outcomes-in-both-primary-and-secondary-prevention-in-patients-with-implantable-cardioverter-defibrillators
#9
Ian C Y Chang, Yusuf M Agamawi, Erin Austin, Wayne O Adkisson, Henri Roukoz, Lisa N von Wald, Scott Sakaguchi, David G Benditt, Lin Y Chen
Whether the risk factors for cardiovascular (CV) outcomes are different in primary versus secondary prevention implantable cardioverter-defibrillator (ICD) patients is unclear. We sought to identify predictors of CV outcomes in ICD recipients for primary (G1) versus secondary prevention (G2). Consecutive patients who had ICD implanted during August 2005 to December 2009 were included. The primary outcome was a composite of appropriate shock, acute coronary syndrome, ischemic stroke, coronary revascularization, heart failure exacerbation, CV hospitalization, or all-cause death...
August 23, 2016: American Journal of Cardiology
https://www.readbyqxmd.com/read/27646203/a-novel-ryr2-loss-of-function-mutation-i4855m-is-associated-with-left-ventricular-non-compaction-and-atypical-catecholaminergic-polymorphic-ventricular-tachycardia
#10
Thomas M Roston, Wenting Guo, Andrew D Krahn, Ruiwu Wang, Filip Van Petegem, Shubhayan Sanatani, S R Wayne Chen, Anna Lehman
BACKGROUND: Catecholaminergic polymorphic ventricular tachycardia (CPVT) is an ion channelopathy usually caused by gain-of-function mutations ryanodine receptor type-2 (RyR2). Left ventricular non-compaction (LVNC) is an often genetic cardiomyopathy. A rare LVNC-CPVT overlap syndrome may be caused by exon 3 deletion in RyR2. We sought to characterize the phenotypic spectrum and molecular basis of a novel RyR2 mutation identified in a family with both conditions. METHODS: Several members of an affected family underwent clinical and genetic assessments...
September 8, 2016: Journal of Electrocardiology
https://www.readbyqxmd.com/read/27623776/nebivolol-suppresses-cardiac-ryanodine-receptor-mediated-spontaneous-ca2-release-and-catecholaminergic-polymorphic-ventricular-tachycardia
#11
Zhen Tan, Zhichao Xiao, Jinhong Wei, Jingqun Zhang, Qiang Zhou, Chris D Smith, Alma Nani, Guogen Wu, Long-Sheng Song, Thomas G Back, Michael Fill, S R Wayne Wayne Chen
Beta-blockers are a standard treatment for heart failure and cardiac arrhythmias. There are about 30 commonly used beta-blockers representing a diverse class of drugs with different receptor affinities and pleiotropic properties. We reported that among 14 beta-blockers tested previously, only carvedilol effectively suppressed cardiac ryanodine receptor (RyR2) mediated spontaneous Ca(2+) waves during store Ca(2+) overload, also known as store-overload induced Ca(2+) release (SOICR). Given the critical role of SOICR in arrhythmogenesis, it is of importance to determine whether there are other beta-blockers that suppress SOICR...
September 13, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27619409/a-broadly-neutralizing-anti-influenza-antibody-reveals-ongoing-capacity-of-haemagglutinin-specific-memory-b-cells-to-evolve
#12
Ying Fu, Zhen Zhang, Jared Sheehan, Yuval Avnir, Callie Ridenour, Thomas Sachnik, Jiusong Sun, M Jaber Hossain, Li-Mei Chen, Quan Zhu, Ruben O Donis, Wayne A Marasco
Understanding the natural evolution and structural changes involved in broadly neutralizing antibody (bnAb) development holds great promise for improving the design of prophylactic influenza vaccines. Here we report an haemagglutinin (HA) stem-directed bnAb, 3I14, isolated from human memory B cells, that utilizes a heavy chain encoded by the IGHV3-30 germline gene. MAb 3I14 binds and neutralizes groups 1 and 2 influenza A viruses and protects mice from lethal challenge. Analysis of VH and VL germline back-mutants reveals binding to H3 and H1 but not H5, which supports the critical role of somatic hypermutation in broadening the bnAb response...
September 13, 2016: Nature Communications
https://www.readbyqxmd.com/read/27618452/the-genetics-of-blood-pressure-regulation-and-its-target-organs-from-association-studies-in-342-415-individuals
#13
Georg B Ehret, Teresa Ferreira, Daniel I Chasman, Anne U Jackson, Ellen M Schmidt, Toby Johnson, Gudmar Thorleifsson, Jian'an Luan, Louise A Donnelly, Stavroula Kanoni, Ann-Kristin Petersen, Vasyl Pihur, Rona J Strawbridge, Dmitry Shungin, Maria F Hughes, Osorio Meirelles, Marika Kaakinen, Nabila Bouatia-Naji, Kati Kristiansson, Sonia Shah, Marcus E Kleber, Xiuqing Guo, Leo-Pekka Lyytikäinen, Cristiano Fava, Niclas Eriksson, Ilja M Nolte, Patrik K Magnusson, Elias L Salfati, Loukianos S Rallidis, Elizabeth Theusch, Andrew J P Smith, Lasse Folkersen, Kate Witkowska, Tune H Pers, Roby Joehanes, Stuart K Kim, Lazaros Lataniotis, Rick Jansen, Andrew D Johnson, Helen Warren, Young Jin Kim, Wei Zhao, Ying Wu, Bamidele O Tayo, Murielle Bochud, Devin Absher, Linda S Adair, Najaf Amin, Dan E Arking, Tomas Axelsson, Damiano Baldassarre, Beverley Balkau, Stefania Bandinelli, Michael R Barnes, Inês Barroso, Stephen Bevan, Joshua C Bis, Gyda Bjornsdottir, Michael Boehnke, Eric Boerwinkle, Lori L Bonnycastle, Dorret I Boomsma, Stefan R Bornstein, Morris J Brown, Michel Burnier, Claudia P Cabrera, John C Chambers, I-Shou Chang, Ching-Yu Cheng, Peter S Chines, Ren-Hua Chung, Francis S Collins, John M Connell, Angela Döring, Jean Dallongeville, John Danesh, Ulf de Faire, Graciela Delgado, Anna F Dominiczak, Alex S F Doney, Fotios Drenos, Sarah Edkins, John D Eicher, Roberto Elosua, Stefan Enroth, Jeanette Erdmann, Per Eriksson, Tonu Esko, Evangelos Evangelou, Alun Evans, Tove Fall, Martin Farrall, Janine F Felix, Jean Ferrières, Luigi Ferrucci, Myriam Fornage, Terrence Forrester, Nora Franceschini, Oscar H Franco, Anders Franco-Cereceda, Ross M Fraser, Santhi K Ganesh, He Gao, Karl Gertow, Francesco Gianfagna, Bruna Gigante, Franco Giulianini, Anuj Goel, Alison H Goodall, Mark O Goodarzi, Mathias Gorski, Jürgen Gräßler, Christopher J Groves, Vilmundur Gudnason, Ulf Gyllensten, Göran Hallmans, Anna-Liisa Hartikainen, Maija Hassinen, Aki S Havulinna, Caroline Hayward, Serge Hercberg, Karl-Heinz Herzig, Andrew A Hicks, Aroon D Hingorani, Joel N Hirschhorn, Albert Hofman, Jostein Holmen, Oddgeir Lingaas Holmen, Jouke-Jan Hottenga, Phil Howard, Chao A Hsiung, Steven C Hunt, M Arfan Ikram, Thomas Illig, Carlos Iribarren, Richard A Jensen, Mika Kähönen, Hyun Min Kang, Sekar Kathiresan, Brendan J Keating, Kay-Tee Khaw, Yun Kyoung Kim, Eric Kim, Mika Kivimaki, Norman Klopp, Genovefa Kolovou, Pirjo Komulainen, Jaspal S Kooner, Gulum Kosova, Ronald M Krauss, Diana Kuh, Zoltan Kutalik, Johanna Kuusisto, Kirsti Kvaløy, Timo A Lakka, Nanette R Lee, I-Te Lee, Wen-Jane Lee, Daniel Levy, Xiaohui Li, Kae-Woei Liang, Honghuang Lin, Li Lin, Jaana Lindström, Stéphane Lobbens, Satu Männistö, Gabriele Müller, Martina Müller-Nurasyid, François Mach, Hugh S Markus, Eirini Marouli, Mark I McCarthy, Colin A McKenzie, Pierre Meneton, Cristina Menni, Andres Metspalu, Vladan Mijatovic, Leena Moilanen, May E Montasser, Andrew D Morris, Alanna C Morrison, Antonella Mulas, Ramaiah Nagaraja, Narisu Narisu, Kjell Nikus, Christopher J O'Donnell, Paul F O'Reilly, Ken K Ong, Fred Paccaud, Cameron D Palmer, Afshin Parsa, Nancy L Pedersen, Brenda W Penninx, Markus Perola, Annette Peters, Neil Poulter, Peter P Pramstaller, Bruce M Psaty, Thomas Quertermous, Dabeeru C Rao, Asif Rasheed, N William Rayner, Frida Renström, Rainer Rettig, Kenneth M Rice, Robert Roberts, Lynda M Rose, Jacques Rossouw, Nilesh J Samani, Serena Sanna, Jouko Saramies, Heribert Schunkert, Sylvain Sebert, Wayne H-H Sheu, Young-Ah Shin, Xueling Sim, Johannes H Smit, Albert V Smith, Maria X Sosa, Tim D Spector, Alena Stančáková, Alice V Stanton, Kathleen E Stirrups, Heather M Stringham, Johan Sundstrom, Amy J Swift, Ann-Christine Syvänen, E-Shyong Tai, Toshiko Tanaka, Kirill V Tarasov, Alexander Teumer, Unnur Thorsteinsdottir, Martin D Tobin, Elena Tremoli, Andre G Uitterlinden, Matti Uusitupa, Ahmad Vaez, Dhananjay Vaidya, Cornelia M van Duijn, Erik P A van Iperen, Ramachandran S Vasan, Germaine C Verwoert, Jarmo Virtamo, Veronique Vitart, Benjamin F Voight, Peter Vollenweider, Aline Wagner, Louise V Wain, Nicholas J Wareham, Hugh Watkins, Alan B Weder, Harm-Jan Westra, Rainford Wilks, Tom Wilsgaard, James F Wilson, Tien Y Wong, Tsun-Po Yang, Jie Yao, Loic Yengo, Weihua Zhang, Jing Hua Zhao, Xiaofeng Zhu, Pascal Bovet, Richard S Cooper, Karen L Mohlke, Danish Saleheen, Jong-Young Lee, Paul Elliott, Hinco J Gierman, Cristen J Willer, Lude Franke, G Kees Hovingh, Kent D Taylor, George Dedoussis, Peter Sever, Andrew Wong, Lars Lind, Themistocles L Assimes, Inger Njølstad, Peter E H Schwarz, Claudia Langenberg, Harold Snieder, Mark J Caulfield, Olle Melander, Markku Laakso, Juha Saltevo, Rainer Rauramaa, Jaakko Tuomilehto, Erik Ingelsson, Terho Lehtimäki, Kristian Hveem, Walter Palmas, Winfried März, Meena Kumari, Veikko Salomaa, Yii-Der I Chen, Jerome I Rotter, Philippe Froguel, Marjo-Riitta Jarvelin, Edward G Lakatta, Kari Kuulasmaa, Paul W Franks, Anders Hamsten, H-Erich Wichmann, Colin N A Palmer, Kari Stefansson, Paul M Ridker, Ruth J F Loos, Aravinda Chakravarti, Panos Deloukas, Andrew P Morris, Christopher Newton-Cheh, Patricia B Munroe
To dissect the genetic architecture of blood pressure and assess effects on target organ damage, we analyzed 128,272 SNPs from targeted and genome-wide arrays in 201,529 individuals of European ancestry, and genotypes from an additional 140,886 individuals were used for validation. We identified 66 blood pressure-associated loci, of which 17 were new; 15 harbored multiple distinct association signals. The 66 index SNPs were enriched for cis-regulatory elements, particularly in vascular endothelial cells, consistent with a primary role in blood pressure control through modulation of vascular tone across multiple tissues...
October 2016: Nature Genetics
https://www.readbyqxmd.com/read/27618448/meta-analysis-identifies-common-and-rare-variants-influencing-blood-pressure-and-overlapping-with-metabolic-trait-loci
#14
Chunyu Liu, Aldi T Kraja, Jennifer A Smith, Jennifer A Brody, Nora Franceschini, Joshua C Bis, Kenneth Rice, Alanna C Morrison, Yingchang Lu, Stefan Weiss, Xiuqing Guo, Walter Palmas, Lisa W Martin, Yii-Der Ida Chen, Praveen Surendran, Fotios Drenos, James P Cook, Paul L Auer, Audrey Y Chu, Ayush Giri, Wei Zhao, Johanna Jakobsdottir, Li-An Lin, Jeanette M Stafford, Najaf Amin, Hao Mei, Jie Yao, Arend Voorman, Martin G Larson, Megan L Grove, Albert V Smith, Shih-Jen Hwang, Han Chen, Tianxiao Huan, Gulum Kosova, Nathan O Stitziel, Sekar Kathiresan, Nilesh Samani, Heribert Schunkert, Panos Deloukas, Man Li, Christian Fuchsberger, Cristian Pattaro, Mathias Gorski, Charles Kooperberg, George J Papanicolaou, Jacques E Rossouw, Jessica D Faul, Sharon L R Kardia, Claude Bouchard, Leslie J Raffel, André G Uitterlinden, Oscar H Franco, Ramachandran S Vasan, Christopher J O'Donnell, Kent D Taylor, Kiang Liu, Erwin P Bottinger, Omri Gottesman, E Warwick Daw, Franco Giulianini, Santhi Ganesh, Elias Salfati, Tamara B Harris, Lenore J Launer, Marcus Dörr, Stephan B Felix, Rainer Rettig, Henry Völzke, Eric Kim, Wen-Jane Lee, I-Te Lee, Wayne H-H Sheu, Krystal S Tsosie, Digna R Velez Edwards, Yongmei Liu, Adolfo Correa, David R Weir, Uwe Völker, Paul M Ridker, Eric Boerwinkle, Vilmundur Gudnason, Alexander P Reiner, Cornelia M van Duijn, Ingrid B Borecki, Todd L Edwards, Aravinda Chakravarti, Jerome I Rotter, Bruce M Psaty, Ruth J F Loos, Myriam Fornage, Georg B Ehret, Christopher Newton-Cheh, Daniel Levy, Daniel I Chasman
Meta-analyses of association results for blood pressure using exome-centric single-variant and gene-based tests identified 31 new loci in a discovery stage among 146,562 individuals, with follow-up and meta-analysis in 180,726 additional individuals (total n = 327,288). These blood pressure-associated loci are enriched for known variants for cardiometabolic traits. Associations were also observed for the aggregation of rare and low-frequency missense variants in three genes, NPR1, DBH, and PTPMT1. In addition, blood pressure associations at 39 previously reported loci were confirmed...
October 2016: Nature Genetics
https://www.readbyqxmd.com/read/27592367/physical-activity-and-albuminuria-were-associated-with-painful-diabetic-polyneuropathy-in-type-2-diabetes-in-an-ethnic-chinese-population
#15
Sheng-Shu Chiang, Chia-Lin Lee, Hsiu-Chen Liu, Jun-Sing Wang, I-Te Lee, Yuh-Min Song, Chia-Po Fu, Yu-Fen Li, Wayne H-H Sheu, Shih-Yi Lin
BACKGROUND: Diabetic neuropathy is a common complication in patients with type 2 diabetes. However, the prevalence of painful diabetic polyneuropathy (PDPN) have been less studied. We examined the prevalence and risk factors of PDPN in outpatients with type 2 diabetes in an ethnic Chinese population. METHODS: This retrospective study enrolled 2358 outpatients with type 2 diabetes who had completed the Douleur Neuropathique en 4 Questions (DN4) questionnaire from January 2013 to October 2013...
November 1, 2016: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/27584033/crossover-between-anti-and-pro-oxidant-activities-of-graphene-quantum-dots-in-the-absence-or-presence-of-light
#16
Yu Chong, Cuicui Ge, Ge Fang, Xin Tian, Xiaochuan Ma, Tao Wen, Wayne G Wamer, Chunying Chen, Zhifang Chai, Jun-Jie Yin
Graphene quantum dots (GQDs), zero-dimensional carbon materials displaying excellent luminescence properties, show great promise for medical applications such as imaging, drug delivery, biosensors, and novel therapeutics. A deeper understanding of how the properties of GQDs interact with biological systems is essential for these applications. Our work demonstrates that GQDs can efficiently scavenge a number of free radicals and thereby protect cells against oxidative damage. However, upon exposure to blue light, GQDs exhibit significant phototoxicity through increasing intracellular reactive oxygen species (ROS) levels and reducing cell viability, attributable to the generation of free radicals under light excitation...
September 27, 2016: ACS Nano
https://www.readbyqxmd.com/read/27582498/suppression-of-ryanodine-receptor-function-prolongs-ca2-release-refractoriness-and-promotes-cardiac-alternans-in-intact-hearts
#17
Xiaowei Zhong, Bo Sun, Alexander Vallmitjana, Tao Mi, Wenting Guo, Mingke Ni, Ruiwu Wang, Ang Guo, Henry J Duff, Anne M Gillis, Long-Sheng Song, Leif Hove-Madsen, Raul Benitez, S R Wayne Wayne Chen
Beat-to-beat alternations in the amplitude of the cytosolic Ca(2+) transient (Ca(2+) alternans) are thought to be the primary cause of cardiac alternans that can lead to cardiac arrhythmias and sudden death. Despite its important role in arrhythmogenesis, the mechanism underlying Ca(2+) alternans remains poorly understood. Here we investigated the role of cardiac ryanodine receptor (RyR2), the major Ca(2+) release channel responsible for cytosolic Ca(2+) transients, in cardiac alternans. Using a unique mouse model harboring a suppression-of-function (SOF) RyR2 mutation (E4872Q), we assessed the effect of genetically suppressing RyR2 function on Ca(2+) and action potential duration (APD) alternans in intact hearts, and electrocardiogram (ECG) alternans in vivo...
August 31, 2016: Biochemical Journal
https://www.readbyqxmd.com/read/27563101/structure-of-the-stra6-receptor-for-retinol-uptake
#18
Yunting Chen, Oliver B Clarke, Jonathan Kim, Sean Stowe, Youn-Kyung Kim, Zahra Assur, Michael Cavalier, Raquel Godoy-Ruiz, Desiree C von Alpen, Chiara Manzini, William S Blaner, Joachim Frank, Loredana Quadro, David J Weber, Lawrence Shapiro, Wayne A Hendrickson, Filippo Mancia
Vitamin A homeostasis is critical to normal cellular function. Retinol-binding protein (RBP) is the sole specific carrier in the bloodstream for hydrophobic retinol, the main form in which vitamin A is transported. The integral membrane receptor STRA6 mediates cellular uptake of vitamin A by recognizing RBP-retinol to trigger release and internalization of retinol. We present the structure of zebrafish STRA6 determined to 3.9-angstrom resolution by single-particle cryo-electron microscopy. STRA6 has one intramembrane and nine transmembrane helices in an intricate dimeric assembly...
August 26, 2016: Science
https://www.readbyqxmd.com/read/27542906/reproducibility-assessment-of-brain-responses-to-visual-food-stimuli-in-adults-with-overweight-and-obesity
#19
R Drew Sayer, Gregory G Tamer, Ningning Chen, Jason R Tregellas, Marc-Andre Cornier, David A Kareken, Thomas M Talavage, Megan A McCrory, Wayne W Campbell
OBJECTIVE: The brain's reward system influences ingestive behavior and subsequently obesity risk. Functional magnetic resonance imaging (fMRI) is a common method for investigating brain reward function. This study sought to assess the reproducibility of fasting-state brain responses to visual food stimuli using BOLD fMRI. METHODS: A priori brain regions of interest included bilateral insula, amygdala, orbitofrontal cortex, caudate, and putamen. Fasting-state fMRI and appetite assessments were completed by 28 women (n = 16) and men (n = 12) with overweight or obesity on 2 days...
October 2016: Obesity
https://www.readbyqxmd.com/read/27532455/common-genetic-polymorphisms-influence-blood-biomarker-measurements-in-copd
#20
Wei Sun, Katerina Kechris, Sean Jacobson, M Bradley Drummond, Gregory A Hawkins, Jenny Yang, Ting-Huei Chen, Pedro Miguel Quibrera, Wayne Anderson, R Graham Barr, Patricia V Basta, Eugene R Bleecker, Terri Beaty, Richard Casaburi, Peter Castaldi, Michael H Cho, Alejandro Comellas, James D Crapo, Gerard Criner, Dawn Demeo, Stephanie A Christenson, David J Couper, Jeffrey L Curtis, Claire M Doerschuk, Christine M Freeman, Natalia A Gouskova, MeiLan K Han, Nicola A Hanania, Nadia N Hansel, Craig P Hersh, Eric A Hoffman, Robert J Kaner, Richard E Kanner, Eric C Kleerup, Sharon Lutz, Fernando J Martinez, Deborah A Meyers, Stephen P Peters, Elizabeth A Regan, Stephen I Rennard, Mary Beth Scholand, Edwin K Silverman, Prescott G Woodruff, Wanda K O'Neal, Russell P Bowler
Implementing precision medicine for complex diseases such as chronic obstructive lung disease (COPD) will require extensive use of biomarkers and an in-depth understanding of how genetic, epigenetic, and environmental variations contribute to phenotypic diversity and disease progression. A meta-analysis from two large cohorts of current and former smokers with and without COPD [SPIROMICS (N = 750); COPDGene (N = 590)] was used to identify single nucleotide polymorphisms (SNPs) associated with measurement of 88 blood proteins (protein quantitative trait loci; pQTLs)...
August 2016: PLoS Genetics
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