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  • Title: Hepatic collagenolytic activity in rats after carbon tetrachloride poisoning.
    Author: Hirayama C, Hiroshige K, Masuya T.
    Journal: Biochem J; 1969 Dec; 115(4):843-7. PubMed ID: 5357025.
    Abstract:
    1. Collagenolytic activity towards acid-soluble collagen labelled with [(14)C]-proline was assayed in rat liver with and without carbon tetrachloride poisoning. The products of enzymic digestion were found to be free amino acids and peptides. 2. The hepatic collagenolytic activity increased under conditions of single-dose and subacute carbon tetrachloride poisoning, and correlated with hydroxyproline content. The highest activity was found during recovery from subacute poisoning. 3. Under the same experimental conditions, hepatic acid-proteinase activity changed independently of the collagenolytic activity and also of hepatic hydroxyproline content. 4. The increased collagenolytic activity during carbon tetrachloride poisoning was found mainly in the supernatant fraction. 5. The ratio of the collagenolytic activity to hepatic hydroxyproline content increased during recovery from single-dose and subacute poisoning, and decreased during subacute poisoning.
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