Nitric oxide synthase 2 (NOS2) mRNA (NOS2 mRNA)

Nitric oxide synthase 2 (NOS2) mRNA is the transcript that encodes the inducible nitric oxide synthase (iNOS) enzyme, a key mediator of the inflammatory response. Unlike the constitutive isoforms (NOS1 and NOS3), NOS2 is rapidly upregulated in response to pro-inflammatory cytokines such as TNF-α and IFN-γ, as well as microbial products like lipopolysaccharide (LPS). Once translated, the iNOS enzyme produces high, sustained levels of nitric oxide (NO), which serves as a potent cytotoxic agent against pathogens but can also cause significant tissue damage and oxidative stress if overproduced. Consequently, NOS2 mRNA is a critical therapeutic target in conditions characterized by chronic inflammation, such as asthma, rheumatoid arthritis, and inflammatory bowel disease, as well as in various cancers where high NO levels promote tumor progression and immunosuppression. Therapeutic strategies targeting the mRNA, such as antisense oligonucleotides (ASOs) and small interfering RNAs (siRNAs), aim to selectively silence iNOS expression at the pre-translational level, offering a potentially more specific approach than small-molecule inhibitors that target the enzyme's active site.

Other names

iNOS mRNAInducible nitric oxide synthase mRNANOS-II mRNANitric oxide synthase 2 transcript

RNA interference (RNAi), Antisense-mediated mRNA degradation (RNase H), Steric hindrance of translation