Abstract:
:Hepatitis B virus (HBV)-induced hepatitis and carcinogen-induced hepatocellular carcinoma (HCC) are associated with serum androgen concentration. However, how androgen or the androgen receptor (AR) contributes to HBV-induced hepatocarcinogenesis remains unclear. We found that hepatic AR promotes HBV-induced hepatocarcinogenesis in HBV transgenic mice that lack AR only in the liver hepatocytes (HBV-L-AR(-/y)). HBV-L-AR(-/y) mice that received a low dose of the carcinogen N'-N'-diethylnitrosamine (DEN) have a lower incidence of HCC and present with smaller tumor sizes, fewer foci formations, and less alpha-fetoprotein HCC marker than do their wild-type HBV-AR(+/y) littermates. We found that hepatic AR increases the HBV viral titer by enhancing HBV RNA transcription through direct binding to the androgen response element near the viral core promoter. This activity forms a positive feedback mechanism with cooperation with its downstream target gene HBx protein to promote hepatocarcinogenesis. Administration of a chemical compound that selectively degrades AR, ASC-J9, was able to suppress HCC tumor size in DEN-HBV-AR(+/y) mice. These results demonstrate that targeting the AR, rather than the androgen, could be developed as a new therapy to battle HBV-induced HCC.
journal_name
Sci Transl Medjournal_title
Science translational medicineauthors
Wu MH,Ma WL,Hsu CL,Chen YL,Ou JH,Ryan CK,Hung YC,Yeh S,Chang Cdoi
10.1126/scitranslmed.3001143subject
Has Abstractpub_date
2010-05-19 00:00:00pages
32ra35issue
32eissn
1946-6234issn
1946-6242pii
2/32/32ra35journal_volume
2pub_type
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