Abstract

The effect of human hapatopoietin i. e. augmenter of liver regeneration (hALR) was determined on hepatocyte DNA synthesis, and on CCl4-induced hepatitis in animal invitro andin vivo. It is found that ALR could directly stimulate DNA synthesis of hepatocytes in primary culture in a dose-dependent manner. In 30% hepatectomied rats, significant DNA synthesis occurred in control rats; even so, exogenous hALR gene encoding protein increased DNA synthesis of regeneration liver by 2.3 fold compared with control rats. A lower dose of CCl4 was administrated in rats and the effect of ALR on DNA synthesis of regenerating liver 48 h after CCl4 administration was analyzed. Few Budr-labeled hepatocytes were visible in control rats. However, exogenous hALR markedly increased the number of labeled cells in a dose-dependent manner. Statistical analysis showed that 10 or 40 μg· kg-1 ALR protein stimulated DNA synthesis by 1.7 and 4.8 fold respectively.

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