性能描述

Amino Acid Sequence
Asp-Arg-Val-Tyr-Ile-His-Pro-Phe

Antibody Adsorbant
Asp-Arg-Val-Tyr-Ile-His-Pro-Phe-OH · 2CH3COOH · H2O

Analysis Note
Peptide content not less than 75%

Biochem/physiol Actions
Angiotensin (Ang) II is important in regulating cardiovascular hemodynamics and cardiovascular structure. Most of the known effects of Ang II in adult tissues are attributable to the angiotensin II type I (AT1) receptor. The AT1 and AT2 receptors have differential pharmacological and biochemical properties and appear to exert opposite effects in terms of cardiovascular hemodynamics and cell growth. In addition, the renin-angiotensin and nitric oxide-generating systems appear to interract in the regulation of cardiovascular function. Ang II stimulates angiogenesis and increases microvessel density. In nature, angiotensin II is produced by the action of angiotensin converting enzyme on angiotensinogen; the C-terminal-His-Leu is cleaved.

主要作用:　　
1、血管紧张素Ⅰ能刺激肾上腺髓质分泌肾上腺素，它直接收缩血管的作用不明显； 　　
2、血管紧张素Ⅱ能使全身小动脉收缩而升高血压，此外，还可促进肾上腺皮质分泌醛固酮，醛固酮作用于肾小管，起保钠、保水、排钾作用，引起血量增多； 　　
3、通过细胞Na-Ca通道，使Ca离子浓度增加，引起血管收缩，从而血压升高（部分治疗高血压药物通过拮抗该作用起效）；血管紧张素Ⅲ的缩血管作用较弱，只有血管紧张素Ⅱ的1/5，但促进醛固酮分泌的作用却强于血管紧张素Ⅱ。