Abstract:
:Apolipoprotein B (apoB) mRNA editing involves a site-specific cytidine to uridine transition catalyzed by the cytidine deaminase, APOBEC-1, in the context of and regulated by a multi-protein-containing editosome. ApoB mRNA editing in vivo is subject to tissue specific, developmental and metabolic regulation. We demonstrate for the first time that the amount of edited apoB mRNA in rat primary hepatocytes is markedly increased subsequent to transient treatment with ethanol in vitro. The apparent change in editing efficiency was dose-dependent (from 0.1%-2.4% initial ethanol dose) and occurred with rapid onset. The proportion of edited apoB mRNA was also markedly enhanced in a rat hepatoma cell line, McArdle RH7777 cells and in a stable McArdle cell line over-expressing APOBEC-1 by transient treatment with 2.5 % ethanol. In contrast, the apoB mRNA editing in a human hepatoma cell line, HepG2 cells and a stable HepG2 cell line over-expressing APOBEC-1 did not respond to ethanol treatment. The data support the possibility that editing activity is ethanol-responsive but suggest that this change is cell type-specific.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Van Mater D,Sowden MP,Cianci J,Sparks JD,Sparks CE,Ballatori N,Smith HCdoi
10.1006/bbrc.1998.9647subject
Has Abstractpub_date
1998-11-18 00:00:00pages
334-9issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(98)99647-4journal_volume
252pub_type
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