Abstract
Reductions in cytochrome P-450 levels and aminopyrine N-demethylase activity of hepatic microsomes obtained from cardiomyopathic hamsters (BIO 14.6) occurred at all stages of the disease before the development of congestive heart failure (CHF). Cytochrome b5 levels were reduced only in animals with CHF when compared with age-matched controls (BIO.RB). Total microsomal protein and p-nitrophenol glucuronidation were not affected by the disease process. We conclude that the reduction in cytochrome P-450 levels and N-demethylase activity in cardiomyopathic hamsters is not a consequence of CHF, but is one of the manifestations of the disease process.
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