title: The crucial role of bile acids in the entry of porcine enteric calicivirus.
abstract: Replication of porcine enteric calicivirus (PEC) in LLC-PK cells is dependent on the presence of bile acids in the medium. However, the mechanism of bile acid-dependent PEC replication is unknown. Understanding of bile acid-mediated PEC replication may provide insight into cultivating related human noroviruses, currently uncultivable, which are the major cause of viral gastroenteritis outbreaks in humans. Our results demonstrated that while uptake of PEC into the endosomes does not require bile acids, the presence of bile acids is critical for viral escape from the endosomes into cell cytoplasm to initiate viral replication. We also demonstrated that bile acid transporters including the sodium-taurocholate co-transporting polypeptide and the apical sodium-dependent bile acid transporter are important in exerting the effects of bile acids in PEC replication in cells. In summary, our results suggest that bile acids play a critical role in virus entry for successful replication.
authors.affiliation: Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, 1800 Denison Avenue, KS 66506, United States.
authors.forename: Vinay
authors.initials: V
authors.lastname: Shivanna
authors.affiliation: Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, 1800 Denison Avenue, KS 66506, United States.
authors.forename: Yunjeong
authors.initials: Y
authors.lastname: Kim
authors.affiliation: Department of Diagnostic Medicine and Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, 1800 Denison Avenue, KS 66506, United States. Electronic address: kchang@vet.ksu.edu.
authors.forename: Kyeong-Ok
authors.initials: KO
authors.lastname: Chang
mesh_terms: D000818:Animals; D001647:Bile Acids and Salts / Q000378:metabolism*; D002478:Cells, Cultured; D003593:Cytoplasm / Q000821:virology; D011992:Endosomes / Q000187:drug effects / Q000821:virology; D004847:Epithelial Cells / Q000821:virology*; D029341:Sapovirus / Q000187:drug effects* / Q000502:physiology*; D013552:Swine; D053586:Virus Internalization / Q000187:drug effects*
chemical_list: D001647:Bile Acids and Salts
keywords: Bile acids; Bile transporters; Endosomal escape; Porcine enteric calicivirus; Virus entry