[Changes in the activity of enzymes of heme synthesis and catabolism, and level of microsomal hemoproteins during the liver acute intoxication by thioacetamide].

Thioacetamide administration to rats (20 mg/100 g) caused the development of toxic hepatitis which was accompanied by the increase of hepatic ALA-synthase and D-ALA that led to accumulating free porphyrines in the liver. At the same time an increase in activity of heme oxigenase was also found. A decrease in heme synthesis correlated with a decrease in content of cytochrome P450 and b5 in microsomal hepatic fraction of experimental animals.

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