Abstract
beta-Hexosaminidase (Hex) activity has been shown to be increased in the sera of patients with chronic liver diseases as well as in rats with CCl4-induced liver cirrhosis. In this study, serum and liver Hex activity was determined in rats during the acute phase of CCl4 poisoning, a widely used animal model of acute necrotic liver damage. The results showed a statistically significant decrease of Hex activity in the sera of rats 36 h after CCl4 poisoning (5.84 +/- 2.90 U/l), as compared to controls (11.58 +/- 1.35 U/l; p less than 0.001). No significant change was observed in liver tissue of CCl4-treated animals and controls. A significant correlation between the decrease in Hex and the increase in serum aspartate aminotransferase in serum was found. The results are consistent with the hypothesis that this lysosomal enzyme could be released by non-parenchymal liver cells, such as activated macrophages; its increased activity could be the expression of macrophage activation, as demonstrated in patients with chronic liver diseases.
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