Influenza A virus polymerase acidic protein mRNA (IAV PA mRNA)

The Influenza A virus polymerase acidic (PA) protein mRNA is the transcript derived from segment 3 of the viral genome, responsible for encoding the PA subunit of the viral RNA-dependent RNA polymerase (RdRp) complex (Pflug et al., 2014, Nature). The PA protein is critical for viral replication as it possesses the endonuclease activity required for "cap-snatching," a process where the virus steals 5' caps from host mRNAs to prime its own transcription (Dias et al., 2009, Nature). Targeting the PA mRNA using RNA interference (RNAi) or antisense oligonucleotides (ASOs) aims to prevent the translation of the PA protein, thereby halting the assembly of the functional RdRp complex and inhibiting viral propagation (Ge et al., 2003, PNAS). While most current clinical treatments like Baloxavir marboxil target the PA protein's enzymatic site, the mRNA itself represents a potent target for sequence-specific gene silencing therapies (Hayden et al., 2018, NEJM). This approach is particularly valuable for addressing drug-resistant strains, although challenges remain regarding delivery to the lungs and the potential for viral escape through sequence evolution (Tompkins et al., 2004, PNAS). The PA mRNA is highly conserved across various IAV strains, making it an attractive target for broad-spectrum antiviral development.

Other names

Influenza A virus segment 3 mRNAPA gene mRNAIAV PA transcriptInfluenza A virus polymerase acidic protein gene transcript

Inhibition of viral protein synthesis via RNA interference (RNAi) or antisense-mediated degradation, leading to the suppression of the viral RNA-dependent RNA polymerase complex assembly.