Hepatitis B virus X region RNA transcript (HBV X RNA)

The Hepatitis B virus (HBV) X region RNA transcript is a vital component of the HBV life cycle, encoding the multi-functional HBx protein. This transcript is essential for the transactivation of both viral and host genes, playing a pivotal role in initiating and maintaining viral replication by stimulating the activity of covalently closed circular DNA (cccDNA) (Source: PubMed, PMID: 26071642). Beyond replication, the X region RNA and its protein product are strongly associated with the pathogenesis of hepatocellular carcinoma (HCC) through the disruption of host cell signaling, DNA repair mechanisms, and apoptotic pathways (Source: NIH, NCBI Bookshelf). Because the HBV genome consists of overlapping open reading frames, the X region sequence is present in nearly all viral mRNA species, making it a highly efficient target for therapeutic silencing (Source: Journal of Hepatology, 2021). Current therapeutic approaches, such as RNA interference (RNAi) and antisense oligonucleotides (ASOs), target this RNA to degrade viral transcripts, reduce the burden of viral proteins like HBsAg, and potentially restore the host's immune response to achieve a functional cure (Source: Nature Reviews Gastroenterology & Hepatology, 2020).

Other names

HBx mRNAHepatitis B virus X gene transcriptHBV X-region mRNAHBx RNA

RNA interference (RNAi)-mediated degradation, Antisense oligonucleotide (ASO)-mediated RNase H cleavage, Gene silencing