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Lumpkin, C.K. et al.

Acute ethanol and selected growth suppressor transcripts in regenerating rat liver.

To study the effects of acute ethanol on regenerating rat liver, the mRNA transcript levels of growth suppressor genes (prohibitin, TGF beta-1 and p53) were measured by Northern blot analysis during the G0, G1, and early S phases of compensatory growth after 70% partial hepatectomy (PH) in adult male rats. Selected animals were gavaged with either ethanol (3 g/kg) or glucose and underwent PH 1 h later. Other animals were either sham operated or underwent PH without gavage. Prohibitin and p53 transcripts were increased in relative abundance (as measured by an increase in band intensity) near the G1/S boundary (8-12 h post-PH) following both glucose and ethanol gavage. A transient increase in prohibitin transcripts at 0.5-1 h post-PH was found to be characteristic of glucose and nongavaged rats. Ethanol gavage significantly increased the relative abundance of prohibitin transcripts at 0.5-2 h post-PH. An increase in the TGF beta-1 transcripts at 4 h post-PH was found in the glucose and nongavaged rats. Ethanol gavage resulted in variable TGF beta-1 transcript expression near hepatectomy (0 h); however, mean differences were not statistically significant. Sham operation had no effect on the mRNA transcripts of the selected genes during the time periods sampled. These results and previous work suggest that the mitoinhibitory effects of acute ethanol exposure may occur via modulation of growth suppressor and proto-oncogene expression.[1]

References

Acute ethanol and selected growth suppressor transcripts in regenerating rat liver. Lumpkin, C.K., Moore, T.L., Tarpley, M.D., Taylor, J.M., Badger, T.M., McClung, J.K. Alcohol (1995) [Pubmed]

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