Angiotensin II 是一种主要的生物活性血管收缩肽,通过与AT1R和AT2R受体结合,调节血压,刺激交感神经,促进醛固酮合成和肾脏功能。它还能诱导血管平滑肌细胞增生、胶原合成增加,导致血管和心肌增厚及纤维化,同时促进细胞凋亡和内皮细胞毛细血管形成。Angiotensin II常用于诱导高血压和心脏肥大动物模型。
Metaraminol hydrochloride, used primarily as a vasoconstrictor in the treatment of HYPOTENSION, is a sympathomimetic agent that acts predominantly at alpha-1 adrenergic receptors.
PD 109488 is a metabolite of quinapril and is a derivative of Quinapril that acts as an ACE inhibitor. Inhibition of ACE prevents the conversion of signaling peptide angiotensin I into angiotensin II, which acts as a potent vasoconstrictor. Reduced levels of angiotensin II also reduces the amount of aldosterone that is expressed due to RAAS signaling.