Hepatitis B virus X protein transactivates inducible nitric oxide synthase gene promoter through the proximal nuclear factor kappaB-binding site: evidence that cytoplasmic location of X protein is essential for gene transactivation.

Abstract excerpt

Nitric oxide appears to play a central role in the pathogenesis of many inflammatory disorders. We have previously shown that there is an enhanced intrahepatic expression of the inducible nitric oxide synthase (iNOS) gene during chronic hepatitis B virus infection, and that viral X protein (HBx) transcriptionally activates this cellular gene, but the molecular basis for this activation remains to be defined. We...

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