The effect of chenodeoxycholic acid on liver monooxygenase system, lipid peroxidation, lymphocyte proliferation, and immune complexes formation was studied in carbontetrachloride-treated rats. Chenodeoxycholic acid increased the content of both cytochrome P-450 and cytochrome b5 and the rate of aminopyrine N-demethylation in liver microsomal fractions. It also normalized lipid peroxidation in the liver and the proliferative activity of blood lymphocytes activated by phytohemagglutinin. Soon after injection chenodeoxycholic acid caused disturbances of the liver histostructure and of the microcirculation followed by regenerative processes. Liver histostructure tended to return to normal. The level of serum immune complexes was increased. The relationship between the changes in monooxygenase system, lipid peroxidation and immunologic parameters is discussed.
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