Altered DNA mutation spectrum in aflatoxin b1-treated transgenic mice that express the hepatitis B virus x protein.

Abstract:

:Humans chronically infected with hepatitis B virus (HBV) are at further risk of liver cancer upon exposure to dietary aflatoxin B1 (AFB1), a carcinogenic product of the mold Aspergillus flavus. For the present study, we utilized double-transgenic mice (ATX mice) that express the HBV X protein (HBx) and possess a bacteriophage lambda transgene to evaluate the in vivo effect of HBx expression on AFB1-induced DNA mutations. The expression of HBx correlated with a 24% increase in mutation frequency overall and an approximately twofold increase in the incidence of G/C-to-T/A transversion mutations following AFB1 exposure. These results are consistent with a model in which expression of HBx during chronic HBV infection may contribute to the development of hepatocellular carcinoma following exposure to environmental carcinogens.

journal_name

J Virol

journal_title

Journal of virology

authors

Madden CR,Finegold MJ,Slagle BL

doi

10.1128/jvi.76.22.11770-11774.2002

subject

Has Abstract

pub_date

2002-11-01 00:00:00

pages

11770-4

issue

22

eissn

0022-538X

issn

1098-5514

journal_volume

76

pub_type

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