Document Detail


Angiotensin-(1-7) reduces proteinuria and diminishes structural damage in renal tissue of stroke-prone spontaneously hypertensive rats.
MedLine Citation:
PMID:  20962118     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Angiotensin (ANG)-(1-7) constitutes an important functional end-product of the renin-angiotensin-aldosterone system that acts to balance the physiological actions of ANG II. In the kidney, ANG-(1-7) exerts beneficial effects by inhibiting growth-promoting pathways and reducing proteinuria. We examined whether a 2-wk treatment with a daily dose of ANG-(1-7) (0.6 mg·kg(-1)·day(-1)) exerts renoprotective effects in salt-loaded stroke-prone spontaneously hypertensive rats (SHRSP). Body weight, glycemia, triglyceridemia, cholesterolemia, as well as plasma levels of Na+ and K+ were determined both at the beginning and at the end of the treatment. Also, the weekly evolution of arterial blood pressure, proteinuria, and creatinine clearance was evaluated. Renal fibrosis was determined by Masson's trichrome staining. Interleukin (IL)-6, tumor necrosis factor (TNF)-α, and nuclear factor-κB (NF-κB) levels were determined by immunohistochemistry and confirmed by Western blotting analysis. The levels of glomerular nephrin were assessed by immunofluorescence. Chronic administration of ANG-(1-7) normalized arterial pressure, reduced glycemia and triglyceridemia, improved proteinuria, and ameliorated structural alterations in the kidney of SHRSP as shown by a restoration of glomerular nephrin levels as detected by immunofluorescence. These results were accompanied with a decrease in both the immunostaining and abundance of IL-6, TNF-α, and NF-κB. In this context, the current study provides strong evidence for a protective role of ANG-(1-7) in the kidney.
Authors:
Jorge F Giani; Marina C Muñoz; Romina A Pons; Gabriel Cao; Jorge E Toblli; Daniel Turyn; Fernando P Dominici
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-20
Journal Detail:
Title:  American journal of physiology. Renal physiology     Volume:  300     ISSN:  1522-1466     ISO Abbreviation:  Am. J. Physiol. Renal Physiol.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-01-07     Completed Date:  2011-02-09     Revised Date:  2011-04-28    
Medline Journal Info:
Nlm Unique ID:  100901990     Medline TA:  Am J Physiol Renal Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  F272-82     Citation Subset:  IM    
Affiliation:
IQUIFIB, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956 (1113 Buenos Aires, Argentina.
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MeSH Terms
Descriptor/Qualifier:
Angiotensin I / therapeutic use*
Animals
Blood Pressure / drug effects
Interleukin-6 / metabolism*
Kidney / drug effects*,  pathology
Male
Membrane Proteins / metabolism
NF-kappa B / metabolism*
Peptide Fragments / therapeutic use*
Proteinuria / drug therapy*
Rats
Rats, Inbred SHR
Rats, Inbred WKY
Sodium Chloride / pharmacology
Tumor Necrosis Factor-alpha / metabolism*
Chemical
Reg. No./Substance:
0/Interleukin-6; 0/Membrane Proteins; 0/NF-kappa B; 0/Peptide Fragments; 0/Tumor Necrosis Factor-alpha; 0/angiotensin I (1-7); 0/nephrin; 7647-14-5/Sodium Chloride; 9041-90-1/Angiotensin I

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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