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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 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 Citation Map 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. Related Collections Hemostasis, Thrombosis, and Vascular Biology Phagocytes Signal Transduction Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 15 July 2003, Vol. 102, No. 2, pp. 662-671 PHAGOCYTES Oxidative stress is a critical mediator of the angiotensin II signal in human neutrophils: involvement of mitogen-activated protein kinase, calcineurin, and the transcription factor NF-B Rajaa El Bekay, Moisés Álvarez, Javier Monteseirín, Gonzalo Álba, Pedro Chacón, Antonio Vega, José Martín-Nieto, Juan Jiménez, Elízabeth Pintado, Francisco J. Bedoya, and Francisco Sobrino From the Departamento de Bioquímica Médica y Biología Molecular, Universidad de Sevilla; Servicio de Alergia e Inmunología, Hospital Universitario Virgen Macarena, Sevilla; and Departamento de Fisiología, Genética y Microbiología, Universidad de Alicante, Spain Neutrophils are mobilized to the vascular wall during vessel inflammation. Published data are conflicting on phagocytic nicotinamide-adenine dinucleotide phosphate (NADPH) oxidase activation during the hypertensive state, 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 endogenous and extracellular O2- production in these cells, consistent 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, tyrosine kinases, and ROS scavengers. Ang II increased cytosolic Ca2+ levels—released mainly 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, underscore the relevant role of ROS as mediators in this process, and uncover a variety of signaling 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: R. Cianci, A. Gigante, L. Polidori, D. Di Donato, P. Martina, B. Barbano, R. Renzulli, A. Zaccaria, and G. Fuiano In-Stent Restenosis of the Renal Artery in a Single Kidney Patient: The Role of ACEI in the Therapeutic Choice Angiology, August 1, 2009; 60(4): 496 - 503. [Abstract] [PDF] Y. C. Chan and P. S. 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