Abstract
A number of biliary secretory processes are inhibited by administration of ampicillin to isolated perfused rat livers. Reduction in output was observed for phospholipid, cholesterol, the endogenous protein rat serum albumin and the exogenous protein bovine serum albumin, whilst secretion of bile salts was virtually unaffected. All of the affected materials are secreed by processes involving vesicles which are brought to the appropriate pole of the hepatocyte, and the observed inhibitory effects of ampicillin may, therefore, possibly be due to a blockage in the transport of these substances. The effects of ampicillin were much less marked on materials secreted at the sinusoidal pole of the cell.
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