| First Author | Reese VC | Year | 2012 |
| Journal | J Virol | Volume | 86 |
| Issue | 5 | Pages | 2760-8 |
| PubMed ID | 22171277 | Mgi Jnum | J:181103 |
| Mgi Id | MGI:5308826 | Doi | 10.1128/JVI.06742-11 |
| Citation | Reese VC, et al. (2012) Limited effects of bile acids and small heterodimer partner on hepatitis B virus biosynthesis in vivo. J Virol 86(5):2760-8 |
| abstractText | Multiple nuclear receptors, including hepatocyte nuclear factor 4alpha (HNF4alpha), retinoid X receptor alpha (RXRalpha) plus peroxisome proliferator-activated receptor alpha (PPARalpha), RXRalpha plus farnesoid X receptor alpha (FXRalpha), liver receptor homolog 1 (LRH1), and estrogen-related receptors (ERRs), have been shown to support efficient viral biosynthesis in nonhepatoma cells in the absence of additional liver-enriched transcription factors. Although HNF4alpha has been shown to be critical for the developmental expression of hepatitis B virus (HBV) biosynthesis in the liver, the relative importance of the various nuclear receptors capable of supporting viral transcription and replication in the adult in vivo has not been clearly established. To investigate the role of the nuclear receptor FXR and the corepressor small heterodimer partner (SHP) in viral biosynthesis in vivo, SHP-expressing and SHP-null HBV transgenic mice were fed a bile acid-supplemented diet. The increased FXR activity and SHP expression levels resulting from bile acid treatment did not greatly modulate HBV RNA and DNA synthesis. Therefore, FXR and SHP appear to play a limited role in modulating HBV biosynthesis, suggesting that alternative nuclear receptors are more critical determinants of viral transcription in the HBV transgenic mouse model of chronic viral infection. These observations suggest that hepatic bile acid levels or therapeutic agents targeting FXR may not greatly modulate viremia during natural infection. |
