Abstract
The inward transport of bile acids in isolated hepatocytes competes with the uptake of phallotoxins. Cholate, taurocholate and glycocholate added 30 s prior to phallotoxins reduce their uptake in a concentration dependent manner. 100 μM bile acids suppress the uptake of phallotoxins completely. Several compounds known to inhibit the bile acid transport reduce the phallotoxin uptake to a similar degree. Hepatocytes exposed to reagents reacting preferentially with amino groups of proteins lose their uptake of both bile acids and phallotoxins. In hepatocytes isolated from 5 day old rats the uptake of both phallotoxins and cholate is reduced as compared to cells from adult controls. AS-30D ascites hepatoma cells, known to be insensitive to phallotoxins are unable to take up both phallotoxins and cholate. The results are consistent with our working hypothesis of a very similar mechanism for the uptake of bile acids and phallotoxins.
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This work was supported by the Deutsche Forschungsgemeinschaft
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Petzinger, E., Frimmer, M. Comparative studies on the uptake of 14C-bile acids and 3H-demethylphalloin in isolated rat liver cells. Arch. Toxicol. 44, 127–135 (1980). https://doi.org/10.1007/BF00303189
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DOI: https://doi.org/10.1007/BF00303189