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Journal of Lipid Research, Vol 20, 914-918, Copyright © 1979 by Lipid Research, Inc.
ARTICLES |
MJ Whiting and AM Edwards
Liver cells isolated from normal and cholestyramine-treated rats were incubated as cell suspensions for up to 4 hr in a simple, defined medium. The bile acid concentration in cells plus cell medium was determined by gas-liquid chromatography. Normal hepatocytes synthesized cholic acid at an initial rate of 0.25 nmol/mg cell protein per hr, which is comparable to rates reported from in vivo methods. This rate was increased more than 4-fold when rats were fed a cholestyramine- containing diet for 7 days prior to liver cell isolation. Although cholic acid was secreted into the cell medium during the incubation, it could not be assayed reliably by the hydroxysteroid dehydrogenase assay method, contrary to the reports of Anwer et al. 1975. Biochem. Biophys. Res. Commun. 64: 603 and Gardner and Chenouda 1978. J. Lipid Res. 19: 985.
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