title: Claudins: multifunctional players in epithelial tight junctions and their role in cancer.
abstract: The molecular architecture of tight junctions has been a subject of extensive studies that have shown tight junctions to be composed of many peripheral and integral membrane proteins. Claudins have been considered the main tight junction-forming proteins; however, the role they play in a series of pathophysiological events, including human carcinoma development, is only now beginning to be understood. Increasing evidence from in vitro and in vivo studies have identified the influence of claudins on tight junction structure and function, although claudins also participate in cellular contexts other than tight junctions. The aim of this review is to summarize and discuss the conceptual framework concerning claudins, focusing on the involvement of these proteins in epithelial cell polarity establishment, paracellular transport control, signal transduction and tumorigenesis.
authors.affiliation: Grupo de Biologia Estrutural, Divisão de Biologia Celular, Centro de Pesquisas, Instituto Nacional de Câncer, Rua André Cavalcanti, Rio de Janeiro, RJ, Brazil.
authors.forename: S S
authors.initials: SS
authors.lastname: Oliveira
authors.forename: J A
authors.initials: JA
authors.lastname: Morgado-Díaz
mesh_terms: D000818:Animals; D001692:Biological Transport; D016764:Cell Polarity; D004847:Epithelial Cells / Q000166:cytology*; D006801:Humans; D008565:Membrane Proteins / Q000378:metabolism*; D009369:Neoplasms / Q000188:drug therapy / Q000378:metabolism*; D015398:Signal Transduction; D019108:Tight Junctions / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D008565:Membrane Proteins