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Advance of molecular mechanism of occult hepatitis B virus |
ZHANG Li QIU Yan |
Beijing Red Cross Blood Center, Beijing 100088, China |
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Abstract Occult hepatitis B virus infection (OBI) means that HBV DNA can be detected in liver tissues of HBsAg negative infected people with highly sensitive nucleic acid detection. This paper introduces the gene molecular mechanism of OBI formation: open reading frame mutation, initiation codon and termination codon mutations of s, p, x and c genes; effect of mutations of gene regulatory sequences on transcriptional processes and post-transcriptional regulation; epigenetic regulation. At present, the studies on epigenetic regulation during the process of HBV replication and gene expression in OBI individuals are still in its infancy, with broad research prospect. In addition, this paper summarizes the gene molecular mechanisms of OBI formation in blood donors of Europe, South Africa, Southeast Asia and China.
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