Abstract
1. 1. The activity of L-GGT (EC 2.4.1.66), an enzyme catalyzing the intraeellular biosynthesis of collagen, was determined in human primary hepatic cancer, acute viral hepatitis and cirrhotic liver tissues and compared to the mean level of enzyme activity in normal human liver tissues. 2. 2. The mean levels of L-GGT activity in primary hepatocellular carcinoma (PHC), acute viral hepatitis and cirrhotic tissues were 7.78, 2.69 and 2.16 times the mean level of enzyme activity in normal human liver tissues. 3. 3. The mean level of L-GGT activity in PHC was 3.61 times the mean level of L-GGT activity in cirrhosis and 2.90 times the mean value of liver enzyme activity in acute viral hepatitis. 4. 4. The findings in this study provide a basis for the highly elevated serum values of this intraeellular enzyme in patients with primary hepatic cancer and the data indicate that L-GGT activity may be increased in primary liver cancer to compensate for an increased rate of collagen synthesis.
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