NOS3 antibody is a specialized immunological reagent designed to detect and quantify nitric oxide synthase 3 (NOS3), also known as endothelial nitric oxide synthase (eNOS). This enzyme catalyzes the production of nitric oxide (NO) from L-arginine in endothelial cells, regulating vascular tone, blood flow, and inflammation . The antibody targets NOS3, a 1,205-amino-acid protein with a molecular weight of approximately 133 kDa, primarily localized in endothelial cells .
NOS3 antibodies are critical tools in both basic and translational research:
Cancer Biology: Elevated NOS3 expression correlates with poor prognosis in gastric (STAD), colorectal, and breast cancers. It promotes angiogenesis via the PI3K/Akt/mTOR pathway and enhances tumor invasiveness .
Cardiovascular Studies: NOS3-derived NO maintains vascular homeostasis, and its dysfunction is linked to hypertension and atherosclerosis .
Sepsis and Inflammation: NOS3 deficiency exacerbates systemic inflammation and myocardial dysfunction during polymicrobial sepsis, highlighting its protective role .
Inhibitors like L-NAME suppress NOS3 activity, reducing tumor growth in pancreatic and colorectal cancers .