through stimulation of guanylate cyclase.
These three factors—leukocyte adhesion, proliferation, and subsequent platelet aggregation—are of great significance in the initial phase of arteriosclerosis. The weakening of the Arg-NO system seems a likely pathogenetic factor in vascular lesions. Several variables are discussed as triggering factors for defects in NOS activity (C): reduced receptor coupling of the agonists, marginal substrate (Arg) or cofactor availability, or inactivation of EDRF (NO) on its way to the site of its intended activity. The latter is blamed mainly on oxidized LDL and/or peroxide anions. In arteriosclerotic vessels, an abnormal vasoconstrictor (endothelin 1) might also form, compensating for the relaxing effect of NO.
Regulatory Functions I
A. NO Synthesis
Was this article helpful?
Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...