Abstract

Human hepatic collagenolytic cathepsin consisted of a major component having a molecular weight of 25000 and a minor one of 35000; the former is indistinguishable from cathepsin B in its enzymatic properties. Hepatic collagenolytic cathepsin increased in chronic active liver disease in proportion to hepatic hydroxyproline content. The ratio of collagenolytic cathepsin to hepatic hydroxyproline content remained within the normal range in chronic hepatitis, but decreased significantly in cirrhosis. These results suggest that collagenolytic cathepsin participates, at least partly, in the progress of hepatic fibrosis.

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