Modulation of ethanol effect on hepatocyte proliferation by polyamines.

Abstract : An occurrence and a magnitude of alcoholic liver diseases depend on the balance between ethanol-induced injury and liver regeneration. Like ethanol, polyamines including putrescine, spermidine, and spermine modulate cell proliferation. Thus, the purpose of this study was to evaluate the relationship between effect of ethanol on hepatocyte (HC) proliferation and polyamine metabolism using the HepaRG cell model. Results showed that ethanol effect in proliferating HepaRG cells was associated with a decrease in intracellular polyamine levels and ornithine decarboxylase (ODC) activity. Ethanol also induced disorders in expression of genes coding for polyamine-metabolizing enzymes. The α-difluoromethyl ornithine, an irreversible inhibitor of ODC, amplified ethanol toxicity on cell viability, protein level, and DNA synthesis through accentuation of polyamine depletion in proliferating HepaRG cells. Conversely, putrescine reversed ethanol effect on cell proliferation parameters. In conclusion, this study suggested that ethanol effect on HC proliferation was closely related to polyamine metabolism and that manipulation of this metabolism by putrescine could protect against the anti-proliferative activity of ethanol.
Type de document :
Article dans une revue
Amino Acids, Springer Verlag, 2013, 44 (3), pp.869-77. 〈10.1007/s00726-012-1413-9〉
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Contributeur : Marie Lecoupe-Grainville <>
Soumis le : vendredi 5 juillet 2013 - 16:28:30
Dernière modification le : mercredi 16 mai 2018 - 11:24:09

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T. H. T. Do, François Gaboriau, Isabelle Morel, Sylvie Lepage, Isabelle Cannie, et al.. Modulation of ethanol effect on hepatocyte proliferation by polyamines.. Amino Acids, Springer Verlag, 2013, 44 (3), pp.869-77. 〈10.1007/s00726-012-1413-9〉. 〈inserm-00841904〉



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