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We examined the impact of early diabetes on the circulating and kidney renin-angiotensin system (RAS) in male and female mRen2.Lewis (mRen2) hypertensive rats. Diabetes (DB) was induced by streptozotocin (STZ; 65 mg/kg) at 11 wk of age for 4 wk without insulin replacement. Systolic blood pressures were not increased in DB males or females compared with controls (CON). Circulating angiotensin-converting enzyme 2 (ACE2) increased ninefold ( P < 0.05) in DB females and threefold ( P < 0.05) in DB males, but circulating ACE and ANG II were higher in the DB groups. Serum C-reactive protein was elevated in DB females but not DB males, and the vascular responses to acetylcholine and estradiol were attenuated in the DB females. Proteinuria, albuminuria, and angiotensinogen excretion increased to a similar extent in both DB females and males. Glomerular VEGF expression also increased to a similar extent in both DB groups. Renal inflammation (CD68 + cells) increased only in DB females although males exhibited greater inflammation that was not different with DB. Cortical ACE2 did not change in DB females but was reduced (30%) in DB males. Renal neprilysin activity (>75%, P < 0.05) was markedly reduced in the DB females to that in the DB and CON males. ACE activity was significantly lower in both female (75%, P < 0.05) and male (50%; P < 0.05) DB groups, while cortical ANG II and Ang-(1-7) levels were unchanged. In conclusion, female mRen2 rats are not protected from vascular damage, renal inflammation, and kidney injury in early STZ-induced diabetes despite a marked increase in circulating ACE2 and significantly reduced ACE within the kidney. angiotensin kidney neprilysin hypertension proteinuria Copyright © 2012 the American Physiological Society « Previous | Next Article » Table of Contents This Article Published online before print February 29, 2012 , doi: 10.1152/ajprenal.00656.2011 AJP - Renal Physiol June 1, 2012 vol. 302 no. 11 F1374-F1384 » Abstract Free Full Text Free to you Full Text (PDF) Free to you All Versions of this Article: ajprenal.00656.2011v1 302/11/F1374 most recent Classifications Series: Integrative Aspects of Renal Endocrinology Call for Papers Services Email this article to a friend Alert me when this article is cited Alert me if a correction is posted Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Download to citation manager Citing Articles Load citing article information Citing articles via Web of Science Google Scholar Articles by Yamaleyeva, L. M. Articles by Chappell, M. C. PubMed PubMed citation Articles by Yamaleyeva, L. M. Articles by Chappell, M. C. Related Content Load related web page information Current Content June 1, 2012 Alert me to new issues of AJP - Renal Physiol About the Journal Information for Authors Submit a Manuscript Ethical Policies AuthorChoice PubMed Central Policy Reprints and Permissions Advertising Press Copyright © 2012 the American Physiological Society Print ISSN: 1931-857X Online ISSN: 1522-1466 var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-2924550-1"); pageTracker._trackPageview(); } catch(err) {} var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-189672-30"); pageTracker._setDomainName(".physiology.org"); pageTracker._trackPageview(); } catch(err) {}
AJP - Renal Physiology – The American Physiological Society
Published: Jun 1, 2012
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