Transcriptional regulation of hepatitis B virus by nuclear hormone receptors is a critical determinant of viral tropism.
basic_science · Level V
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- Record sourced from PubMed, PMID 11172038.
- Also identified by PMC identifier 29344.
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Abstract
Hepatotropism is a prominent feature of hepatitis B virus (HBV) infection. Cell lines of nonhepatic origin do not independently support HBV replication. Here, we show that the nuclear hormone receptors, hepatocyte nuclear factor 4 and retinoid X receptor alpha plus peroxisome proliferator-activated receptor alpha, support HBV replication in nonhepatic cells by controlling pregenomic RNA synthesis, indicating these liver-enriched transcription factors control a unique molecular switch restricting viral tropism. In contrast, hepatocyte nuclear factor 3 antagonizes nuclear hormone receptor-mediated viral replication, demonstrating distinct regulatory roles for these liver-enriched transcription factors.
Medical subject headings
- Gene Expression Regulation, Viral
- Hepatitis B virus
- Phosphoproteins
- Receptors, Cytoplasmic and Nuclear
- Receptors, Retinoic Acid
- Transcription Factors
- Transcription, Genetic