STUDY ON THE BIOLOGICAL ACTIVITIES OF BRAIN NATRIURETIC PEPTIDE AND ITS ANALOG
- VernacularTitle:脑钠素和脑钠素类似物的生物活性
- Author:
Shuli SHENG
- Publication Type:Journal Article
- Keywords:
Brain natriuretic peptide Analog Cerebral blood flow Biological activity
- From:
Chinese Journal of Endocrinology and Metabolism
1986;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Brain natriuretic peptide consists of 26 amino acids and has diuretic, natriuretic and hypotensive activities. We have synthesized BNP and its analog (BNP-A) (Mpr4, D-Ala613)-BNP(4-26)-NH2 using solid phase method and examined their biological activities. Our results showed that 1) BNP (10-7mol/L) dilated human basal cerebral artery which was pre-constricted with endothelin, 5-HT and noradrenaline in vitro; 2) both BNP (5 ?g/ rat) and BNP-A (5 ?g/ rat) increased regional cerebral blood flow following i.v. injection in rats; 3) intracerebroventricular injection of BNP (3 ?g/ rat) induced an obvious natriuretic effect when blood volume was extremely expanded with hypoosmotic glucose solution in rats; 4) BNP (5 ?g/ rat) infusion for 60 minutes caused a decline of plasma concentration of angiotensin II and aldosterone at the end of infusion in spontaneous hypertensive rats (SHR), and the bolus injection of BNP (10 ?g/ rat) led to a fall in blood pressure about 1.33kPa. We conclude that BNP is an important peptide in regulating water and sodium metabolism and plays an important role in regulating blood flow to various organs.
