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THE DISTRIBUTION OF DEOXYRIBONUCLEASE IN NORMAL, CIRRHOTIC AND NEOPLASTIC RAT LIVERS

R. DAOUST 1 and A. CANTERO 1

1 Research Laboratories, Montreal Cancer Institute, Notre-Dame Hospital and University of Montreal, Montreal, Canada

The distribution of deoxyribonuclease in normal, cirrhotic and neoplastic rat livers was investigated histochemically using the gelatine-DNA film method.

The bile duct cells and connective tissue elements which are present in abnormal amounts in cirrhotic liver contain little DNAase activity compared with parenchymal tissue. The distribution pattern of DNAase is relatively uniform in normal liver parenchyma but becomes heterogeneous in the parenchyma of cirrhotic and neoplastic tissues. Groups of parenchymal cells in cirrhotic liver and the hepatoma cells in general appear devoid of DNAase activity. The necrotic areas of tissues, on the other hand, show intense enzyme activity.

Submitted on October 20, 1958


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