Nitric oxide donor mechanism

Nitric oxide donor mechanism describes the process by which NO donor drugs release nitric oxide (NO) within the body. NO acts as a pivotal signaling molecule, especially in the vascular endothelium, where it causes smooth muscle relaxation through activation of soluble guanylyl cyclase and subsequent increases in cGMP. This leads to potent vasodilation, making NO donor mechanisms therapeutically valuable in treating angina, hypertension, heart failure, and other cardiovascular disorders. NO donors also play roles in neural signaling, immune response, and platelet function. While NO donor drugs are widely used, their mechanism is not itself a drug target, but rather the pharmacological action shared by various molecules, which deliver NO either directly or via metabolic conversion.

Other names

NO donor mechanismNO release mechanismNitric oxide-releasing mechanism

Release of nitric oxide (NO) which activates soluble guanylyl cyclase (sGC) in target tissues. Increased synthesis of cyclic GMP (cGMP), leading to activation of protein kinase G (PKG), reduced intracellular calcium, and smooth muscle relaxation. Inhibition of platelet aggregation via cGMP pathway.