Effect of cytostatics on liver retinol store in rat.

The effect of the cytostatics doxorubicin, 6-thioguanine and cytarabine on retinol store in rat liver was examined. When rats were treated with pharmacological doses of the combination of doxorubicin and 6-thioguanine for 10 days, the content of retinol in the liver was reduced by about 33%. In a longer term experiment, doxorubicin and cytarabine given separately reduced the retinol store by 33% and 11%, respectively, while doxorubicin and 6-thioguanine given in combination reduced retinol in liver by 31%. For one of the cytostatics (doxorubicin) the effects on plasma retinol and on acyl CoA:retinol acyltransferase (ARAT) activity in small intestine were also examined. Both were transiently reduced during the experiment.