Adaptive downregulation of Cl- /HCO3 - exchange activity in rat hepatocytes under experimental obstructive cholestasis

dc.citation.titlePLOS ONEes
dc.citation.volume14(2)es
dc.creatorMiszczuk, Gisel Sabrina
dc.creatorBanales, Jesus M.
dc.creatorZucchetti, Andrés E.
dc.creatorPisani, Gerardo Bruno
dc.creatorBoaglio, Andrea C.
dc.creatorSaez, Elena
dc.creatorMedina, Juan F.
dc.creatorRoma, Marcelo Gabriel
dc.creatorCrocenzi, Fernando A.
dc.date.accessioned2021-03-02T18:05:22Z
dc.date.available2021-03-02T18:05:22Z
dc.date.issued2019-02-21
dc.descriptionIn obstructive cholestasis, there is an integral adaptive response aimed to diminish the bile flow and minimize the injury of bile ducts caused by increased intraluminal pressure and harmful levels of bile salts and bilirrubin. Canalicular bicarbonate secretion, driven by the anion exchanger 2 (AE2), is an influential determinant of the canalicular bile salt-independent bile flow. In this work, we ascertained whether AE2 expression and/or activity is reduced in hepatocytes from rats with common bile duct ligation (BDL), as part of the adaptive response to cholestasis. After 4 days of BDL, we found that neither AE2 mRNA expression (measured by quantitative real-time PCR) nor total levels of AE2 protein (assessed by western blot) were modified in freshly isolated hepatocytes. However, BDL led to a decrease in the expression of AE2 protein in plasma membrane fraction as compared with SHAM control. Additionally, AE2 activity (JOH-, mmol/L/min), measured in primary cultured hepatocytes from BDL and SHAM rats, was decreased in the BDL group versus the control group (1.9 ± 0.3 vs. 3.1 ± 0.2, p<0.005). cAMP-stimulated AE2 activity, however, was not different between SHAM and BDL groups (3.7 ± 0.3 vs. 3.5 ± 0.3), suggesting that cAMP stimulated insertion into the canalicular membrane of AE2-containing intracellular vesicles, that had remained abnormally internalized after BDL. In conclusion, our results point to the existence of a novel adaptive mechanism in cholestasis aimed to reduce biliary pressure, in which AE2 internalization in hepatocytes might result in decreased canalicular HCO3 - output and decreased bile flow.es
dc.descriptionPara citar este articulo: Miszczuk GS, Banales JM, Zucchetti AE, Pisani GB, Boaglio AC, Saez E, et al. (2019) Adaptive downregulation of Cl- /HCO3 - exchange activity in rat hepatocytes under experimental obstructive cholestasis. PLoS ONE 14(2): e0212215. https://doi.org/10.1371/journal. pone.0212215
dc.description.filFil: Miszczuk, Gisel Sabrina. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental (IFISE -CONICET); Argentina.es
dc.description.filFil: Banales, Jesus M. Universidad de Navarra. Centro de Investigación Médica Aplicada (CIMA). Área de Terapia Génica y Hepatología; España.es
dc.description.filFil: Banales, Jesus M. Universidad del País Vasco/ Euskal Herriko Unibertsitatea (UPV/EHU). Instituto de Investigación Sanitaria Biodonostia. Área de Enfermedades Hepáticas y Gastrointestinales; España.es
dc.description.filFil: Banales, Jesus M. Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD); España.es
dc.description.filFil: Banales, Jesus M. Fundación Vasca para la Ciencia (IKERBASQUE); España.es
dc.description.filFil: Zucchetti, Andrés E. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental (IFISE -CONICET); Argentina.es
dc.description.filFil: Pisani, Gerardo Bruno. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Área Morfología; Argentina.es
dc.description.filFil: Boaglio, Andrea C. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental (IFISE -CONICET); Argentina.es
dc.description.filFil: Saez, Elena. Universidad de Navarra. Centro de Investigación Médica Aplicada (CIMA). Área de Terapia Génica y Hepatología; España.es
dc.description.filFil: Medina, Juan F. Universidad de Navarra. Centro de Investigación Médica Aplicada (CIMA). Área de Terapia Génica y Hepatología; España.es
dc.description.filFil: Roma, Marcelo Gabriel. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental (IFISE -CONICET); Argentina.es
dc.description.filFil: Crocenzi, Fernando A. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental (IFISE -CONICET); Argentina.es
dc.description.filFil: Crocenzi, Fernando A. Universidad de Navarra. Centro de Investigación Médica Aplicada (CIMA). Área de Terapia Génica y Hepatología; España.es
dc.description.sponsorshipInstituto de Salud Carlos III (ISCIII) - Fondo Europeo de Desarrollo Regional (FEDER): FIS PI15/01132, PI18/01075 y Miguel Servet Program CON14/00129es
dc.description.sponsorshipInstituto de Salud Carlos III (ISCIII)es
dc.description.sponsorshipBasque Foundation for Innovation and Health Research: : EiTB Maratoia BIO15/CA/016/BDes
dc.description.sponsorshipDepartment of Health of the Basque Country: 2017111010es
dc.description.sponsorshipEuskadi RIS3: 2016222001, 2017222014 y 2018222029es
dc.description.sponsorshipFundación Científica de la Asociación Española Contra el Cánceres
dc.description.sponsorshipConsejo Nacional de Investigaciones Científicas y Técnicas (CONICET)es
dc.formatapplication/pdf
dc.format.extent1-15es
dc.identifier.issn1932-6203es
dc.identifier.urihttp://hdl.handle.net/2133/19973
dc.language.isoenges
dc.publisherPublic Library of Science (PLOS)es
dc.relation.publisherversionhttps://doi.org/10.1371/journal.pone.0212215es
dc.relation.publisherversionhttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0212215es
dc.rightsopenAccesses
dc.rights.holderUniversidad Nacional de Rosarioes
dc.rights.holderMiszczuk, Gisel Sabrinaes
dc.rights.holderBanales, Jesus M.es
dc.rights.holderZucchetti, Andrés E.es
dc.rights.holderPisani, Gerardo Brunoes
dc.rights.holderBoaglio, Andrea C.es
dc.rights.holderSaez, Elenaes
dc.rights.holderMedina, Juan F.es
dc.rights.holderRoma, Marcelo Gabrieles
dc.rights.holderCrocenzi, Fernando A.es
dc.rights.textAttribution 4.0 International (CC BY 4.0)es
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subjectObstructive Cholestasises
dc.subjectChloride-Bicarbonate Antiporterses
dc.subjectTransporter Localizationes
dc.subjectTransporter Expressiones
dc.titleAdaptive downregulation of Cl- /HCO3 - exchange activity in rat hepatocytes under experimental obstructive cholestasises
dc.typearticle
dc.typeartículo
dc.typepublishedVersion
dc.type.collectionarticulo
dc.type.versionpublishedVersiones

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