Regulation of hepatocyte bile salt transporters during hepatic regeneration

Green, R. M. and Gollan, J. L. and Hagenbuch, B. and Meier, P. J. and Beier, D. R.. (1997) Regulation of hepatocyte bile salt transporters during hepatic regeneration. American journal of physiology. Gastrointestinal and liver physiology, Vol. 273, H. 3 , G621-G627.

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Official URL: http://edoc.unibas.ch/dok/A5261717

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Bile formation is an essential liver-specific function, and the hepatic regeneration that occurs in response to hepatocellular injury is often associated with cholestasis. We have employed a partial hepatectomy model to examine the effect of hepatic regeneration on tissue-specific bile salt transporters and on Na(+)-K(+)-adenosinetriphosphatase (ATPase). Liver-specific sodium-dependent taurocholate uptake by basolateral plasma membrane vesicles was undetectable 24 h after hepatectomy. Basolateral membrane protein expression of the sodium-taurocholate cotransporter and gene expression of Ntcp were decreased by < 90% 24 h after partial hepatectomy. In vitro transcription assays demonstrated that Ntcp gene transcription was also markedly reduced. In contrast, hepatic Na(+)-K(+)-ATPase activity, protein expression, and gene expression were unaffected by partial hepatectomy. Similarly, protein and gene expression of the ectoATPase, a putative canalicular bile salt transporter, and canalicular ATP-dependent taurocholate uptake remained unchanged. Partial hepatectomy results in a marked reduction in the gene transcription and expression of the liver-specific Ntcp, as well as a decrease in protein expression and loss of transport activity. These changes provide a potential mechanism for the decrease in hepatocellular bile salt transport that is associated with hepatic regeneration.
Faculties and Departments:11 Rektorat und Verwaltung > Vizerektorat Forschung
UniBasel Contributors:Meier-Abt, Peter J.
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physiological Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:22 Mar 2012 14:21
Deposited On:22 Mar 2012 13:23

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