title: Regulation of cholangiocyte bicarbonate secretion.
abstract: The objective of this review article is to discuss the role of secretin and its receptor in the regulation of the secretory activity of intrahepatic bile duct epithelial cells (i.e., cholangiocytes). After a brief overview of cholangiocyte functions, we provide an historical background for the role of secretin and its receptor in the regulation of ductal secretion. We review the newly developed experimental in vivo and in vitro tools, which lead to understanding of the mechanisms of secretin regulation of cholangiocyte functions. After a description of the intracellular mechanisms by which secretin stimulates ductal secretion, we discuss the heterogeneous responses of different-sized intrahepatic bile ducts to gastrointestinal hormones. Furthermore, we outline the role of a number of cooperative factors (e.g., nerves, alkaline phosphatase, gastrointestinal hormones, neuropeptides, and bile acids) in the regulation of secretin-stimulated ductal secretion. Finally, we discuss other factors that may also play an important role in the regulation of secretin-stimulated ductal secretion.
authors.affiliation: Department of Internal Medicine, Scott & White Hospital and Texas A&M University System Health Science Center, College of Medicine, TX 76504, USA.
authors.forename: N
authors.initials: N
authors.lastname: Kanno
authors.forename: G
authors.initials: G
authors.lastname: LeSage
authors.forename: S
authors.initials: S
authors.lastname: Glaser
authors.forename: G
authors.initials: G
authors.lastname: Alpini
mesh_terms: D000818:Animals; D001639:Bicarbonates / Q000378:metabolism*; D001646:Bile / Q000378:metabolism; D001647:Bile Acids and Salts / Q000378:metabolism; D001653:Bile Ducts, Intrahepatic / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D016207:Cytokines / Q000378:metabolism; D004847:Epithelial Cells / Q000187:drug effects / Q000378:metabolism*; D005768:Gastrointestinal Hormones / Q000378:metabolism / Q000494:pharmacology; D006801:Humans; D009569:Nitric Oxide / Q000378:metabolism; D043562:Receptors, G-Protein-Coupled; D011964:Receptors, Gastrointestinal Hormone / Q000378:metabolism; D012633:Secretin / Q000378:metabolism / Q000494:pharmacology
chemical_list: D001639:Bicarbonates; D001647:Bile Acids and Salts; D016207:Cytokines; D005768:Gastrointestinal Hormones; D043562:Receptors, G-Protein-Coupled; D011964:Receptors, Gastrointestinal Hormone; C029937:secretin receptor; D012633:Secretin; D009569:Nitric Oxide