Document Detail


Chronic sildenafil treatment corrects endothelial dysfunction and improves hypertension.
MedLine Citation:
PMID:  20110668     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Nitric oxide (NO) availability plays a critical role in the regulation of blood pressure, endothelial function and arterial structure. Many of the biological actions of NO are mediated by 3'5'-guanosine monophosphate (cGMP), which is rapidly degraded by cGMP phosphodiesterase (PDE). Short-term cardiovascular effects of PDE inhibitors have been studied but the changes resulting from their chronic administration in hypertension have not been evaluated. We investigated if retarding the degradation of cGMP by long-term inhibition of PDE-5 would have beneficial consequences in spontaneously hypertensive rats (SHR), a commonly used experimental model of human essential hypertension. METHODS: Subgroups of hypertensive 13-week-old male SHR and normotensive Wistar-Kyoto rats were treated with sildenafil, 2.5 mg/kg/day, or vehicle, by gastric gavage for 6 months. RESULTS: As expected, the untreated SHR had endothelial dysfunction and a steady increment of the blood pressure. In contrast, chronic sildenafil administration reversed endothelial dysfunction, reduced renal oxidative stress and renal macrophage accumulation, and ameliorated the severity of hypertension in SHR. CONCLUSIONS: These results demonstrate beneficial effects of long-term PDE-5 inhibition in SHR and suggest that its use as an adjunct therapy in essential hypertension should be investigated.
Authors:
Keila Yaguas; Rocio Bautista; Yasmir Quiroz; Atilio Ferrebuz; Héctor Pons; Martha Franco; Nosratola D Vaziri; Bernardo Rodriguez-Iturbe
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-27
Journal Detail:
Title:  American journal of nephrology     Volume:  31     ISSN:  1421-9670     ISO Abbreviation:  Am. J. Nephrol.     Publication Date:  2010  
Date Detail:
Created Date:  2010-04-14     Completed Date:  2010-08-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8109361     Medline TA:  Am J Nephrol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  283-91     Citation Subset:  IM    
Copyright Information:
2010 S. Karger AG, Basel.
Affiliation:
Centro de Investigaciones Biomédicas, Instituto Venezolano de Investigaciones Científicas, Zulia, Venezuela.
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MeSH Terms
Descriptor/Qualifier:
Animals
Endothelium, Vascular / drug effects*,  physiopathology*
Hypertension / drug therapy*
Male
Phosphodiesterase Inhibitors / administration & dosage*
Piperazines / administration & dosage*
Purines / administration & dosage
Rats
Rats, Inbred SHR
Sulfones / administration & dosage*
Chemical
Reg. No./Substance:
0/Phosphodiesterase Inhibitors; 0/Piperazines; 0/Purines; 0/Sulfones; 139755-83-2/sildenafil

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


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