Hepatic microsomal mixed-function oxidases in rats exposed to high ambient temperature.

Exposure of rats for 3 h or 6h to 28 degrees C or 37 degrees C led to changes in mixed-function oxidases in liver microsomes as compared with 21 degrees C. The complex pattern of the behaviour of the activities of aniline hydroxylase, 4-nitroanisole-O-demethylase, aminopyrine N-demethylase and NADH: cytochrome c oxidoreductase was not related to the observed decrease of cytochrome P-450 and cytochrome b5 contents.