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Distinct morphological and mito-inhibitory effects induced by TGF-beta 1, HGF and EGF on mouse, rat and human hepatocytes


, : Distinct morphological and mito-inhibitory effects induced by TGF-beta 1, HGF and EGF on mouse, rat and human hepatocytes. Cell Biology and Toxicology 10(4): 219-230

TGF-beta 1 is known as a potent inhibitor of proliferation of rat and human hepatocytes. In this study we show that the effects of TGF-beta 1 are quite different on mouse hepatocytes. In rat and human hepatocytes, TGF-beta 1 inhibited DNA synthesis and also inhibited the morphological changes induced by growth factors in rat and human hepatocytes. In contrast, addition of TGF-beta 1 to mouse hepatocytes resulted in pronounced alterations in morphology of these cells. These changes were similar to those induced by HGF and EGF. The induction of structural changes by TGF-beta 1 was noted only in mouse hepatocytes. Mouse hepatocytes were also much more resistant to the mito-inhibitory effect of TGF-beta 1. These findings suggest profound differences in hepatocyte growth regulation between these species and may relate to observed differences in susceptibility to carcinogenesis.

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PMID: 7895151


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