Dadun/></a>
				</td>
				<td class= Dadun
   (New user)
Help  | Contact  |  Castellano English  
 

Dadun > Depósito Académico > CIMA (Centro de Investigación Médica Aplicada) > Área de Ciencias Cardiovasculares > Enfermedad vascular hipertensiva > DA - CIMA - Cardiovasculares - Enfermedad vascular - Artículos de Revista >

Association of increased phagocytic NADPH oxidasedependent superoxide production with diminished nitric oxide generation in essential hypertension
Authors: Fortuño, A. (Ana)
Olivan, S. (Sara)
Beloqui, O. (Óscar)
San-Jose, G. (Gorka)
Moreno, M.U. (María Ujué)
Diez, J. (Javier)
Zalba, G. (Guillermo)
Keywords: Hypertension
Mononuclear cells
NADPH oxidase
Nitric oxide
Issue Date: Nov-2004
Publisher: Lippincott Williams & Wilkins
Publisher version: http://journals.lww.com/jhypertension/Abstract/2004/11000/Association_of_increased_phagocytic_NADPH.20.aspx
ISSN: 1473-5598
Citation: Fortuño A, Oliván S, Beloqui O, San José G, Moreno MU, Díez J, et al. Association of increased phagocytic NADPH oxidase-dependant superoxide production with diminished nitric oxide generation in essential hypertension. J Hypertens 2004;22(11):2169-2175.
Abstract
Objective: Oxidative stress has been implicated in the pathogenesis of hypertension and its complications through alterations in nitric oxide (NO) metabolism. This study was designed to investigate whether a relationship exists between phagocytic nicotinamide adenine dinucleotide phosphate (NADPH) oxidase-dependent superoxide anion (•O2-) production and NO generation in patients with essential hypertension. Methods: Superoxide production was assayed by chemiluminescence under baseline and stimulated conditions on mononuclear cells obtained from hypertensives (n = 51) and normotensives (n = 43). NO production was evaluated by determining serum NO metabolites, nitrate plus nitrite (NOx). Results: Although there were no differences in baseline •O2- production between normotensives and hypertensives, the •O2- production in phorbol myristate acetate (PMA)-stimulated mononuclear cells was increased (P < 0.05) in hypertensives compared with normotensives. The PMA-induced •O2- production was completely abolished by apocynin, a specific inhibitor of NADPH oxidase. Moreover, stimulation of •O2- production by angiotensin II and endothelin-1 was higher (P < 0.05) in cells from hypertensives than in cells from normotensives. In addition, diminished (P < 0.001) serum NOx was detected in hypertensives compared with normotensives. Interestingly, an inverse correlation (r = 0.493, P < 0.01) was found between •O2- production and NOx in hypertensives. Conclusions: Generation of •O2- mainly dependent on NADPH oxidase is abnormally enhanced in stimulated mononuclear cells from hypertensives. It is suggested that this alteration could be involved in the diminished NO production observed in these patients.
Permanent link: http://hdl.handle.net/10171/17838
Appears in Collections:DA - CIMA - Cardiovasculares - Cardiopatía hipertensiva - Artículos de Revista
DA - CIMA - Cardiovasculares - Enfermedad vascular - Artículos de Revista

Files in This Item:
File:  2004 Fortuño et al. J Hypertens 2004.pdf
Description: 
Size:  126,37 kB
Format:  Adobe PDF
 View / Open 

Items in Dadun are protected by copyright, with all rights reserved, unless otherwise indicated.