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Citation
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HERO ID
1337302
Reference Type
Journal Article
Title
Evidence of associations of APOBEC3B gene deletion with susceptibility to persistent HBV infection and hepatocellular carcinoma
Author(s)
Zhang, T; Cai, J; Chang, J; Yu, D; Wu, C; Yan, T; Zhai, K; Bi, X; Zhao, H; Xu, J; Tan, W; Qu, C; Lin, D
Year
2013
Is Peer Reviewed?
Yes
Journal
Human Molecular Genetics
ISSN:
0964-6906
EISSN:
1460-2083
Volume
22
Issue
6
Page Numbers
1262-1269
Language
English
PMID
23213177
DOI
10.1093/hmg/dds513
Web of Science Id
WOS:000316296600016
Abstract
APOBEC3s are a family of cytidine deaminases involved in innate cellular immunity against virus including hepatitis B virus (HBV). A germline deletion across APOBEC3A and APOBEC3B (A3B) genes results in complete removal of the A3B coding region and destroys A3B expression. To determine whether this deletion affects susceptibility to HBV infection and HBV-related hepatocellular carcinoma (HCC), A3B genotypes were analyzed in 1,124 individuals with HCC, 510 individuals with persistent HBV infection and 826 healthy controls and the association was estimated by odds ratio (OR) and 95% confidence interval (CI) computed by logistic regression. We also examined the effects of APOBEC3B on HBV genome hypermutation and replication in HCC cells. We observed a significantly higher frequency of the A3B deletion allele in persistent HBV carriers (33.3%; P=0.0015) and HCC patients (37.9%; P=1.28×10(-11)) compared with that in controls (27.5%). An increased risk for persistent HBV infection (OR=1.35, 95% CI, 1.03-1.77) and HCC development (OR=1.90, 95% CI, 1.58-2.28) was associated with at least one A3B deletion allele (+/- or -/- genotype) compared with the +/+ genotype. Transfection of A3B in HepG2 cells caused a substantial reduction of HBV RNA levels and G→A hypermutation in HBV genome. Interestingly, a cytidine deaminase null mutant of A3B (E255A) also inhibited HBV RNA production although it was unable to edit HBV. These results suggest that deletion of A3B attenuates HBV clearance, which in turn may result in persistent HBV infection and increased risk for developing HCC. Further studies are needed to verify our findings.
Tags
IRIS
•
Arsenic Hazard ID
1. Initial Lit Search
PubMed
4. Considered through Oct 2015
6. Cluster Filter through Oct 2015
iAs MOA Literature Categorization
Epigenetic Mechanisms
Immune
•
Arsenic (Inorganic)
1. Literature
PubMed
4. Adverse Outcome Pathways/Networks Screening
Excluded/Not relevant
Electronic discard
•
Arsenic MOA
2. Electronic Discard
1. MOA Literature Screening
MOA Cluster
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