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claudin gene regulation

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https://www.readbyqxmd.com/read/28094766/matriptase-mediated-cleavage-of-epcam-destabilizes-claudins-and-dysregulates-intestinal-epithelial-homeostasis
#1
Chuan-Jin Wu, Xu Feng, Michael Lu, Sohshi Morimura, Mark C Udey
Congenital tufting enteropathy (CTE) is a severe autosomal recessive human diarrheal disorder with characteristic intestinal epithelial dysplasia. CTE can be caused by mutations in genes encoding EpCAM, a putative adhesion molecule, and HAI-2, a cell surface protease inhibitor. A similar phenotype occurs in mice whose intestinal epithelial cells (IECs) fail to express the tight junction-associated protein claudin-7. EpCAM stabilizes claudin-7 in IECs, and HAI-2 regulates the cell surface serine protease matriptase, a known modifier of intestinal epithelial physiology...
January 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28068922/functional-changes-in-mrna-expression-and-alternative-pre-mrna-splicing-associated-with-the-effects-of-nutrition-on-apoptosis-and-spermatogenesis-in-the-adult-testis
#2
Yongjuan Guan, Guanxiang Liang, Graeme B Martin, Le Luo Guan
BACKGROUND: The effects of nutrition on testis mass in the sexually mature male have long been known, however, the cellular and molecular processes of the testis response to nutrition was not fully understood. METHODS: We tested whether the defects in spermatogenesis and increases in germ cell apoptosis in the testis that are induced by under-nutrition are associated with changes in mRNA expression and pre-mRNA alternative splicing using groups of 8 male sheep fed for a 10% increase or 10% decrease in body mass over 65 days...
January 10, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28018313/outer-membrane-vesicles-and-soluble-factors-released-by-probiotic-escherichia-coli-nissle-1917-and-commensal-ecor63-enhance-barrier-function-by-regulating-expression-of-tight-junction-proteins-in-intestinal-epithelial-cells
#3
Carina-Shianya Alvarez, Josefa Badia, Manel Bosch, Rosa Giménez, Laura Baldomà
The gastrointestinal epithelial layer forms a physical and biochemical barrier that maintains the segregation between host and intestinal microbiota. The integrity of this barrier is critical in maintaining homeostasis in the body and its dysfunction is linked to a variety of illnesses, especially inflammatory bowel disease. Gut microbes, and particularly probiotic bacteria, modulate the barrier integrity by reducing gut permeability and reinforcing tight junctions. Probiotic Escherichia coli Nissle 1917 (EcN) is a good colonizer of the human gut with proven therapeutic efficacy in the remission of ulcerative colitis in humans...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27999452/microrna-regulation-of-endothelial-junction-proteins-and-clinical-consequence
#4
REVIEW
Yugang Zhuang, Hu Peng, Victoria Mastej, Weiguo Chen
Cellular junctions play a critical role in structural connection and signal communication between cells in various tissues. Although there are structural and functional varieties, cellular junctions include tight junctions, adherens junctions, focal adhesion junctions, and tissue specific junctions such as PECAM-1 junctions in endothelial cells (EC), desmosomes in epithelial cells, and hemidesmosomes in EC. Cellular junction dysfunction and deterioration are indicative of clinical diseases. MicroRNAs (miRNA) are ~20 nucleotide, noncoding RNAs that play an important role in posttranscriptional regulation for almost all genes...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27982694/cigarette-smoke-and-decreased-oxygen-tension-inhibit-pulmonary-claudin-6-expression
#5
Felix R Jimenez, Josh B Lewis, Samuel T Belgique, Dallin C Milner, Adam L Lewis, Todd M Dunaway, Kaleb M Egbert, Duane R Winden, Juan A Arroyo, Paul R Reynolds
PURPOSE: Chronic obstructive pulmonary disease is a condition involving perturbed barrier integrity coincident with both emphysema and inflammation of the airways, and smoking is considered a major risk factor. Claudins (Cldns) stabilize barriers and contribute to tight junctions by preventing paracellular transport of extracellular fluid constituents. METHODS: To determine Cldn6 was differentially influenced by tobacco smoke, Cldn6 was evaluated in cells and tissues by q-PCR, immunoblotting, and immunohistochemistry following exposure...
December 16, 2016: Experimental Lung Research
https://www.readbyqxmd.com/read/27942952/one-gene-two-paracellular-ion-channels-claudin-10-in-the-kidney
#6
REVIEW
Susanne Milatz, Tilman Breiderhoff
Claudins are tight junction membrane proteins and regulate the paracellular passage of ions and water. They can seal the paracellular cleft against solute passage but also form paracellular channels. They are tetraspan proteins with two extracellular segments. Claudin-10 exists in at least two functional isoforms, claudin-10a and claudin-10b, that differ in their first transmembrane segment and first extracellular segment. Both isoforms act as selective paracellular ion channels, either for anions (claudin-10a) or for cations (claudin-10b)...
January 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27915449/common-variants-in-cldn14-are-associated-with-differential-excretion-of-magnesium-over-calcium-in-urine
#7
REVIEW
Tanguy Corre, Eric Olinger, Sarah E Harris, Michela Traglia, Sheila Ulivi, Stefania Lenarduzzi, Hendrica Belge, Sonia Youhanna, Natsuko Tokonami, Olivier Bonny, Pascal Houillier, Ozren Polasek, Ian J Deary, John M Starr, Daniela Toniolo, Paolo Gasparini, Peter Vollenweider, Caroline Hayward, Murielle Bochud, Olivier Devuyst
The nature and importance of genetic factors regulating the differential handling of Ca(2+) and Mg(2+) by the renal tubule in the general population are poorly defined. We conducted a genome-wide meta-analysis of urinary magnesium-to-calcium ratio to identify associated common genetic variants. We included 9320 adults of European descent from four genetic isolates and three urban cohorts. Urinary magnesium and calcium concentrations were measured centrally in spot urine, and each study conducted linear regression analysis of urinary magnesium-to-calcium ratio on ~2...
January 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27904960/active-and-passive-involvement-of-claudins-in-the-pathophysiology-of-intestinal-inflammatory-diseases
#8
REVIEW
Christian Barmeyer, Michael Fromm, Jörg-Dieter Schulzke
Intestinal inflammatory diseases, four of which are discussed here, are associated with alterations of claudins. In ulcerative colitis, diarrhea and antigen entry into the mucosa occurs. Claudin-2 is upregulated but data on other claudins are still limited or vary (e.g., claudin-1 and -4). Apart from that, tight junction changes contribute to diarrhea via a leak flux mechanism, while protection against antigen entry disappears behind epithelial gross lesions (erosions) and apoptotic foci. Crohn's disease is additionally characterized by a claudin-5 and claudin-8 reduction which plays an active role in antigen uptake already before gross lesions appear...
January 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27895742/comparative-analysis-of-gene-expression-profiles-of-gastric-cardia-adenocarcinoma-and-gastric-non-cardia-adenocarcinoma
#9
Bin Song, Juan Du, Neng Deng, Ji-Chen Ren, Zhen-Bo Shu
In the present study, gene expression profiles were analyzed to identify the molecular mechanisms underlying gastric cardia adenocarcinoma (GCA) and gastric non-cardia adenocarcinoma (GNCA). A gene expression dataset (accession number GSE29272) was downloaded from Gene Expression Omnibus, and consisted of 62 GCA samples and 62 normal controls, as well as 72 GNCA samples and 72 normal controls. The two groups of differentially-expressed genes (DEGs) were compared to obtain common and unique DEGs. A differential analysis was performed using the Linear Models for Microarray Data package in R...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27888130/protective-role-of-phenylalanine-on-the-ros-induced-oxidative-damage-apoptosis-and-tight-junction-damage-via-nrf2-tor-and-nf-%C3%AE%C2%BAb-signalling-molecules-in-the-gill-of-fish
#10
Lin Feng, Wen Li, Yang Liu, Wei-Dan Jiang, Sheng-Yao Kuang, Pei Wu, Jun Jiang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou
This study explored the possible preventive effects of dietary phenylalanine (Phe) on antioxidant responses, apoptosis and tight junction protein transcription in the gills of young grass carp (Ctenopharyngodon idella). Fish were fed six different experimental diets containing graded levels of Phe (3.4-16.8 g kg(-1)) for 8 weeks. The results showed that Phe deficiency induced protein oxidation and lipid peroxidation by decreasing the glutathione content and the activities and mRNA levels of Cu/Zn superoxide dismutase (SOD1), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and glutathione-S-transferase (GST) in fish gill (P < 0...
November 23, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27878608/claudins-in-barrier-and-transport-function-the-kidney
#11
REVIEW
Yongfeng Gong, Jianghui Hou
Claudins are discovered to be key players in renal epithelial physiology. They are involved in developmental, physiological, and pathophysiological differentiation. In the glomerular podocytes, claudin-1 is an important determinant of cell junction fate. In the proximal tubule, claudin-2 plays important roles in paracellular salt reabsorption. In the thick ascending limb, claudin-14, -16, and -19 regulate the paracellular reabsorption of calcium and magnesium. Recessive mutations in claudin-16 or -19 cause an inherited calcium and magnesium losing disease...
January 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27873103/differential-regulation-of-angiogenic-cellular-processes-and-claudin-5-by-histamine-and-vegf-via-pi3k-signaling-transcription-factor-snai2-and-interleukin-8
#12
Johanna P Laakkonen, Jari P Lappalainen, Thomas L Theelen, Pyry I Toivanen, Tiina Nieminen, Suvi Jauhiainen, Minna U Kaikkonen, Judith C Sluimer, Seppo Ylä-Herttuala
AIMS: Histamine and vascular endothelial growth factor A (VEGF) are central regulators in vascular pathologies. Their gene regulation leading to vascular remodeling has remained obscure. In this study, EC regulation mechanisms of histamine and VEGF were compared by RNA sequencing of primary endothelial cells (ECs), functional in vitro assays and in vivo permeability mice model. METHODS AND RESULTS: By RNA sequencing, similar transcriptional alterations of genes involved in activation of primary ECs, cell proliferation and adhesion were observed between histamine and VEGF...
November 21, 2016: Angiogenesis
https://www.readbyqxmd.com/read/27827449/gata4-is-critical-to-maintain-gut-barrier-function-and-mucosal-integrity-following-epithelial-injury
#13
David Lepage, Élise Bélanger, Christine Jones, Sarah Tremblay, Joannie M Allaire, Joannie Bruneau, Claude Asselin, Nathalie Perreault, Alfredo Menendez, Fernand-Pierre Gendron, Francois Boudreau
The intestinal epithelial barrier is critical to limit potential harmful consequences from exposure to deleterious luminal contents on the organism. Although this barrier is functionally important along the entire gut, specific regional regulatory mechanisms involved in the maintenance of this barrier are poorly defined. Herein, we identified Gata4 as a crucial regulator of barrier integrity in the mouse proximal intestinal epithelium. Conditional deletion of Gata4 in the intestine led to a drastic increase in claudin-2 expression that was associated with an important increase of gut barrier permeability without causing overt spontaneous inflammation...
November 9, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27799551/degradation-of-cyclic-diguanosine-monophosphate-by-a-hybrid-two-component-protein-protects-azoarcus-sp-strain-cib-from-toluene-toxicity
#14
Zaira Martín-Moldes, Blas Blázquez, Claudine Baraquet, Caroline S Harwood, María T Zamarro, Eduardo Díaz
Cyclic diguanosine monophosphate (c-di-GMP) is a second messenger that controls diverse functions in bacteria, including transitions from planktonic to biofilm lifestyles, virulence, motility, and cell cycle. Here we describe TolR, a hybrid two-component system (HTCS), from the β-proteobacterium Azoarcus sp. strain CIB that degrades c-di-GMP in response to aromatic hydrocarbons, including toluene. This response protects cells from toluene toxicity during anaerobic growth. Whereas wild-type cells tolerated a sudden exposure to a toxic concentration of toluene, a tolR mutant strain or a strain overexpressing a diguanylate cyclase gene lost viability upon toluene shock...
November 15, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27747999/bdnf-modulates-intestinal-barrier-integrity-through-regulating-the-expression-of-tight-junction-proteins
#15
Y-B Yu, D-Y Zhao, Q-Q Qi, X Long, X Li, F-X Chen, X-L Zuo
BACKGROUND: Brain-derived neurotrophic factor (BDNF) may play a vital role in the homeostatic regulation of intestinal barrier integrity. We aimed to investigate the physiological role of BDNF in maintaining the intestinal epithelial barrier using postinflammatory irritable bowel syndrome (PI-IBS) mice and explore the underlying molecular mechanisms using intestinal epithelial cells in vitro. METHODS: Postinflammatory-IBS mice were induced by intrarectal administration of trinitrobenzene sulfonic acid and allowed to recover for 28 days...
October 17, 2016: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/27726456/effect-of-human-rhinovirus-infection-on-airway-epithelium-tight-junction-protein-disassembly-and-transepithelial-permeability
#16
Kevin Looi, Niamh M Troy, Luke W Garratt, Thomas Iosifidis, Anthony Bosco, Alysia G Buckley, Kak-Ming Ling, Kelly M Martinovich, Elizabeth Kicic-Starcevich, Nicole C Shaw, Erika N Sutanto, Graeme R Zosky, Paul J Rigby, Alexander N Larcombe, Darryl A Knight, Anthony Kicic, Stephen M Stick
RATIONALE: No studies have assessed the effects of human rhinovirus (HRV) infection on epithelial tight junctions (TJs) and resultant barrier function. AIM OF THE STUDY: To correlate viral infection with TJ disassembly, epithelial barrier integrity, and function. MATERIALS AND METHODS: Human airway epithelial cells were infected with HRV minor serotype 1B (HRV-1B) at various 50% tissue culture infectivity doses (TCID50) over 72 hours. HRV replication was assessed by quantitative-polymerase chain reaction (qPCR) while cell viability and apoptosis were assessed by proliferation and apoptotic assays, respectively...
October 11, 2016: Experimental Lung Research
https://www.readbyqxmd.com/read/27698798/celecoxib-exhibits-an-anti-gastric-cancer-effect-by-targeting-focal-adhesion-and-leukocyte-transendothelial-migration-associated-genes
#17
Guo-Hua Jin, Wei Xu, Yang Shi, Li-Bo Wang
Gastric cancer (GC) is a prevalent cancer, which remains incurable, and therefore requires an alternative treatment method. Celecoxib is a nonsteroidal anti-inflammatory drug that targets cyclooxygenase-2, and exhibits anticancer effects. The present study aimed to investigate the anti-GC mechanism of celecoxib using bioinformatics methods. Gene expression datasets GSE56807 (GC tissues and normal gastric tissues) and GSE54657 (celecoxib-treated and non-treated human GC epithelial AGS cells) were downloaded from the Gene Expression Omnibus database...
October 2016: Oncology Letters
https://www.readbyqxmd.com/read/27649506/identification-of-claudin-1-transcript-variants-in-human-invasive-breast-cancer
#18
Anne A Blanchard, Teresa Zelinski, Jiuyong Xie, Steven Cooper, Carla Penner, Etienne Leygue, Yvonne Myal
BACKGROUND: The claudin 1 tight junction protein, solely responsible for the barrier function of epithelial cells, is frequently down regulated in invasive human breast cancer. The underlying mechanism is largely unknown, and no obvious mutations in the claudin 1 gene (CLDN1) have been identified to date in breast cancer. Since many genes have been shown to undergo deregulation through splicing and mis-splicing events in cancer, the current study was undertaken to investigate the occurrence of transcript variants for CLDN1 in human invasive breast cancer...
2016: PloS One
https://www.readbyqxmd.com/read/27601076/functional-mechanisms-underlying-pleiotropic-risk-alleles-at-the-19p13-1-breast-ovarian-cancer-susceptibility-locus
#19
Kate Lawrenson, Siddhartha Kar, Karen McCue, Karoline Kuchenbaeker, Kyriaki Michailidou, Jonathan Tyrer, Jonathan Beesley, Susan J Ramus, Qiyuan Li, Melissa K Delgado, Janet M Lee, Kristiina Aittomäki, Irene L Andrulis, Hoda Anton-Culver, Volker Arndt, Banu K Arun, Brita Arver, Elisa V Bandera, Monica Barile, Rosa B Barkardottir, Daniel Barrowdale, Matthias W Beckmann, Javier Benitez, Andrew Berchuck, Maria Bisogna, Line Bjorge, Carl Blomqvist, William Blot, Natalia Bogdanova, Anders Bojesen, Stig E Bojesen, Manjeet K Bolla, Bernardo Bonanni, Anne-Lise Børresen-Dale, Hiltrud Brauch, Paul Brennan, Hermann Brenner, Fiona Bruinsma, Joan Brunet, Shaik Ahmad Buhari, Barbara Burwinkel, Ralf Butzow, Saundra S Buys, Qiuyin Cai, Trinidad Caldes, Ian Campbell, Rikki Canniotto, Jenny Chang-Claude, Jocelyne Chiquette, Ji-Yeob Choi, Kathleen B M Claes, Linda S Cook, Angela Cox, Daniel W Cramer, Simon S Cross, Cezary Cybulski, Kamila Czene, Mary B Daly, Francesca Damiola, Agnieszka Dansonka-Mieszkowska, Hatef Darabi, Joe Dennis, Peter Devilee, Orland Diez, Jennifer A Doherty, Susan M Domchek, Cecilia M Dorfling, Thilo Dörk, Martine Dumont, Hans Ehrencrona, Bent Ejlertsen, Steve Ellis, Christoph Engel, Eunjung Lee, D Gareth Evans, Peter A Fasching, Lidia Feliubadalo, Jonine Figueroa, Dieter Flesch-Janys, Olivia Fletcher, Henrik Flyger, Lenka Foretova, Florentia Fostira, William D Foulkes, Brooke L Fridley, Eitan Friedman, Debra Frost, Gaetana Gambino, Patricia A Ganz, Judy Garber, Montserrat García-Closas, Aleksandra Gentry-Maharaj, Maya Ghoussaini, Graham G Giles, Rosalind Glasspool, Andrew K Godwin, Mark S Goldberg, David E Goldgar, Anna González-Neira, Ellen L Goode, Marc T Goodman, Mark H Greene, Jacek Gronwald, Pascal Guénel, Christopher A Haiman, Per Hall, Emily Hallberg, Ute Hamann, Thomas V O Hansen, Patricia A Harrington, Mikael Hartman, Norhashimah Hassan, Sue Healey, Florian Heitz, Josef Herzog, Estrid Høgdall, Claus K Høgdall, Frans B L Hogervorst, Antoinette Hollestelle, John L Hopper, Peter J Hulick, Tomasz Huzarski, Evgeny N Imyanitov, Claudine Isaacs, Hidemi Ito, Anna Jakubowska, Ramunas Janavicius, Allan Jensen, Esther M John, Nichola Johnson, Maria Kabisch, Daehee Kang, Miroslav Kapuscinski, Beth Y Karlan, Sofia Khan, Lambertus A Kiemeney, Susanne Kruger Kjaer, Julia A Knight, Irene Konstantopoulou, Veli-Matti Kosma, Vessela Kristensen, Jolanta Kupryjanczyk, Ava Kwong, Miguel de la Hoya, Yael Laitman, Diether Lambrechts, Nhu Le, Kim De Leeneer, Jenny Lester, Douglas A Levine, Jingmei Li, Annika Lindblom, Jirong Long, Artitaya Lophatananon, Jennifer T Loud, Karen Lu, Jan Lubinski, Arto Mannermaa, Siranoush Manoukian, Loic Le Marchand, Sara Margolin, Frederik Marme, Leon F A G Massuger, Keitaro Matsuo, Sylvie Mazoyer, Lesley McGuffog, Catriona McLean, Iain McNeish, Alfons Meindl, Usha Menon, Arjen R Mensenkamp, Roger L Milne, Marco Montagna, Kirsten B Moysich, Kenneth Muir, Anna Marie Mulligan, Katherine L Nathanson, Roberta B Ness, Susan L Neuhausen, Heli Nevanlinna, Silje Nord, Robert L Nussbaum, Kunle Odunsi, Kenneth Offit, Edith Olah, Olufunmilayo I Olopade, Janet E Olson, Curtis Olswold, David O'Malley, Irene Orlow, Nick Orr, Ana Osorio, Sue Kyung Park, Celeste L Pearce, Tanja Pejovic, Paolo Peterlongo, Georg Pfeiler, Catherine M Phelan, Elizabeth M Poole, Katri Pylkäs, Paolo Radice, Johanna Rantala, Muhammad Usman Rashid, Gad Rennert, Valerie Rhenius, Kerstin Rhiem, Harvey A Risch, Gus Rodriguez, Mary Anne Rossing, Anja Rudolph, Helga B Salvesen, Suleeporn Sangrajrang, Elinor J Sawyer, Joellen M Schildkraut, Marjanka K Schmidt, Rita K Schmutzler, Thomas A Sellers, Caroline Seynaeve, Mitul Shah, Chen-Yang Shen, Xiao-Ou Shu, Weiva Sieh, Christian F Singer, Olga M Sinilnikova, Susan Slager, Honglin Song, Penny Soucy, Melissa C Southey, Marie Stenmark-Askmalm, Dominique Stoppa-Lyonnet, Christian Sutter, Anthony Swerdlow, Sandrine Tchatchou, Manuel R Teixeira, Soo H Teo, Kathryn L Terry, Mary Beth Terry, Mads Thomassen, Maria Grazia Tibiletti, Laima Tihomirova, Silvia Tognazzo, Amanda Ewart Toland, Ian Tomlinson, Diana Torres, Thérèse Truong, Chiu-Chen Tseng, Nadine Tung, Shelley S Tworoger, Celine Vachon, Ans M W van den Ouweland, Helena C van Doorn, Elizabeth J van Rensburg, Laura J Van't Veer, Adriaan Vanderstichele, Ignace Vergote, Joseph Vijai, Qin Wang, Shan Wang-Gohrke, Jeffrey N Weitzel, Nicolas Wentzensen, Alice S Whittemore, Hans Wildiers, Robert Winqvist, Anna H Wu, Drakoulis Yannoukakos, Sook-Yee Yoon, Jyh-Cherng Yu, Wei Zheng, Ying Zheng, Kum Kum Khanna, Jacques Simard, Alvaro N Monteiro, Juliet D French, Fergus J Couch, Matthew L Freedman, Douglas F Easton, Alison M Dunning, Paul D Pharoah, Stacey L Edwards, Georgia Chenevix-Trench, Antonis C Antoniou, Simon A Gayther
A locus at 19p13 is associated with breast cancer (BC) and ovarian cancer (OC) risk. Here we analyse 438 SNPs in this region in 46,451 BC and 15,438 OC cases, 15,252 BRCA1 mutation carriers and 73,444 controls and identify 13 candidate causal SNPs associated with serous OC (P=9.2 × 10(-20)), ER-negative BC (P=1.1 × 10(-13)), BRCA1-associated BC (P=7.7 × 10(-16)) and triple negative BC (P-diff=2 × 10(-5)). Genotype-gene expression associations are identified for candidate target genes ANKLE1 (P=2 × 10(-3)) and ABHD8 (P<2 × 10(-3))...
September 7, 2016: Nature Communications
https://www.readbyqxmd.com/read/27593915/claudin-3-and-claudin-19-partially-restore-native-phenotype-to-arpe-19%C3%A2-cells-via-effects-on-tight-junctions-and-gene-expression
#20
Shaomin Peng, Shao-Bin Wang, Deepti Singh, Peter Y C Zhao, Katherine Davis, Bo Chen, Ron A Adelman, Lawrence J Rizzolo
Mutations of claudin-19 cause severe ocular deficits that are not easily reconciled with its role in regulating the outer blood retinal barrier. ARPE-19 is a widely used culture model of the retinal pigment epithelium (RPE). ARPE-19 is unique among epithelial cell lines, because it expresses all tight junction proteins except claudin family members. ARPE-19 also loses aspects of the RPE phenotype with cell passage. This study asks whether exogenous expression of the main RPE claudins, claudin-3 and claudin-19, would restore RPE phenotype, and whether these claudins have distinct roles in RPE...
October 2016: Experimental Eye Research
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