no losartan a

Angiotensin II is a hormone that plays an important role in regulating blood pressure. Elevated levels of angiotensin II are implicated in inducing and maintaining hypertension, and also in the development of atherosclerosis. Both of these effects are mediated by the angiotensin II type 1 (AT1) receptor. Losartan is a mammalian AT1 receptor antagonist with a Ki value of 5-20 nM. In humans, losartan effectively controls hypertension while protecting renal function. Nitric oxide (NO) causes vasodilation and also inhibits platelet and neutrophil aggregation in the endothelium. NO-losartan A possesses similar anti-hypertensive effects to losartan, with the addition of the vasodilating effects of NO release.

UR-7247 is a novel orally active angiotensin II subtype I (AT1) antagonist, demonstrating very long pharmacological effects. in vivo studies indicate no significant difference between 10 mg UR-7247 and 100 mg losartan four hours post-administration, while in vitro blockade with 100 mg losartan exceeds that observed with UR-7247, confirming UR-7247’s extended plasma half-life potentially due to high-affinity protein binding, highlighting its long-lasting, well-tolerated AT1 receptor antagonism in healthy subjects.