Impairment of the angiotensin-converting enzyme 2-angiotensin-(1-7)-Mas axis contributes to the acceleration of two-kidney, one-clip Goldblatt hypertension
Jazyk angličtina Země Nizozemsko Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
- MeSH
- angiotensin I krev genetika farmakologie MeSH
- angiotensin II analogy a deriváty krev genetika metabolismus farmakologie MeSH
- chirurgické nástroje MeSH
- implantabilní infuzní pumpy MeSH
- kardiomegalie metabolismus patofyziologie MeSH
- krevní tlak účinky léků fyziologie MeSH
- krysa rodu Rattus MeSH
- modely nemocí na zvířatech MeSH
- peptidové fragmenty krev genetika farmakologie MeSH
- potkani transgenní MeSH
- progrese nemoci MeSH
- renovaskulární hypertenze chemicky indukované metabolismus patofyziologie MeSH
- telemetrie MeSH
- vazodilatancia farmakologie MeSH
- zvířata MeSH
- Check Tag
- krysa rodu Rattus MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- 7-Ala-angiotensin (1-7) MeSH Prohlížeč
- angiotensin I (1-7) MeSH Prohlížeč
- angiotensin I MeSH
- angiotensin II MeSH
- peptidové fragmenty MeSH
- vazodilatancia MeSH
OBJECTIVE: Recent studies have shown that the heptapeptide angiotensin-(1-7) [Ang-(1-7)] exerts important vasoactive actions and can act as an endogenous physiological antagonist of angiotensin II (Ang II) within the renin-angiotensin system (RAS). The present study was performed to evaluate the effects, first, of chronic increases of Ang-(1-7) levels, second, of [7-D-Ala], an Ang-(1-7) receptor antagonist, and, third, of an angiotensin-converting enzyme 2 (ACE2) inhibitor on the course of hypertension and of renal function of the nonclipped kidney in two-kidney, one-clip (2K1C) Goldblatt hypertensive rats. METHODS: Blood pressure (BP) was monitored by radiotelemetry. Elevation of the effect of circulating Ang-(1-7) levels was achieved either by chronic subcutaneous infusion of Ang-(1-7) through osmotic minipumps or by employing transgenic rats that express an Ang-(1-7)-producing fusion protein [Ang-(1-7)TGR+/+] (and its control Ang-(1-7)TGR-/-). [7-D-Ala] was also infused subcutaneously and the ACE2 inhibitor was administrated in drinking water. On day 25 after clipping, rats were anesthetized and renal function was evaluated. RESULTS: Chronic infusion of Ang-(1-7) did not modify the course of 2K1C hypertension and did not alter renal function as compared with saline vehicle-infused 2K1C rats. Chronic infusion of [7-D-Ala] or treatment with the ACE2 inhibitor worsened the course of hypertension and elicited decreases in renal hemodynamics. [Ang-(1-7)TGR+/+] and [Ang-(1-7)TGR-/-] rats exhibited a similar course of hypertension. CONCLUSION: The present data support the notion that Ang-(1-7) serves as an important endogenous vasodilator and natriuretic agent and its deficiency might contribute to the acceleration of 2K1C Goldblatt hypertension.
Citace poskytuje Crossref.org
Research on Experimental Hypertension in Prague (1966-2009)
