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Modulation of ethanol effect on hepatocyte proliferation by polyamines.
MedLine Citation:
PMID:  23053023     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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.
Authors:
T H T Do; F Gaboriau; I Morel; S Lepage; I Cannie; O Loréal; G Lescoat
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-11
Journal Detail:
Title:  Amino acids     Volume:  -     ISSN:  1438-2199     ISO Abbreviation:  Amino Acids     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9200312     Medline TA:  Amino Acids     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Inserm, UMR 991, «Foie, Métabolismes et Cancer», Hôpital Pontchaillou, 2 rue Henri Le Guilloux, 35033, Rennes Cedex, France.
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