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Prepublished online as a Blood First Edition Paper on March 27, 2003; DOI 10.1182/blood-2002-09-2785. This Article Full Text (PDF) All Versions of this Article: 2002-09-2785v1 102/2/662    most recent Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by El Bekay, R. Articles by Sobrino, F. Search for Related Content PubMed PubMed Citation Articles by El Bekay, R. Articles by Sobrino, F. Social Bookmarking                   What's this? Submitted September 11, 2002 Accepted February 19, 2003 Oxidative stress is a critical mediator of the angiotensin II signal in human neutrophils: involvement of map kinases, calcineurin, and the transcription factor NF-B Rajaa El Bekay, Moises Alvarez, Gonzalo Alba, Pedro Chacon, Antonio Vega, Jose Martin-Nieto, Juan Jimenez, Javier Monteseirin, Elizabeth Pintado, Francisco J Bedoya, and Francisco Sobrino* Departamento de Bioquimica Medica y Biologia Molecular, University of Sevilla, Sevilla, Spain; Servicio de Alergia e Inmunologia, Hospital Virgen Macarena, Sevilla, Spain Departamento de Fisiologia, Genetica y Microbiologia, University of Alicante, Alicante, Spain * Corresponding author; email: fosbrino{at}us.es. Neutrophils are mobilized to the vascular wall during vessel inflammation. Conflicting data on phagocytic NADPH oxidase activation during the hypertensive state have been published, and the capacity of angiotensin II (Ang II) to modulate the intracellular redox status has not been analyzed in neutrophils. We here describe that Ang II highly stimulates both endogenous and extracellular O2.- production in these cells, consistently with the translocation to the cell membrane of the cytosolic components of NADPH oxidase, p47phox and p67phox. The Ang II-dependent O2.- production was suppressed by specific inhibitors of AT1 receptors, of the p38MAPK and ERK1/2 pathways and of flavin oxidases. Furthermore, Ang II induced a robust phosphorylation of p38MAPK, ERK1/2 and JNK1/2 (particularly JNK2), which was hindered by inhibitors of NADPH oxidase and tyrosine kinases, as well as by ROS scavengers. Ang II increased cytosolic Ca2+ levels -mainly released from calcium stores-, enhanced the synthesis de novo and activity of calcineurin, and stimulated the DNA-binding activity of the transcription factor NF-B in cultured human neutrophils. Present data demonstrate for the first time a stimulatory role of Ang II in the activation of phagocytic cells, underscores the relevant role of ROS as mediators in this process and uncovers a variety of signalling pathways by which Ang II operates in human neutrophils. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: L. Guasti, F. Marino, M. Cosentino, R. C. Maio, E. Rasini, M. Ferrari, L. Castiglioni, C. Klersy, G. Gaudio, A. M. Grandi, et al. Prolonged statin-associated reduction in neutrophil reactive oxygen species and angiotensin II type 1 receptor expression: 1-year follow-up Eur. Heart J., May 1, 2008; 29(9): 1118 - 1126. [Abstract] [Full Text] [PDF] N. 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