Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension

Oxidative stress plays a critical role in the pathogenesis of hypertension. The NADPH oxidase constitutes a major source of superoxide anion in phagocytic cells, and its activation is associated with matrix metalloproteinase (MMP)-9 secretion by these cells. We investigated the effects of the angiot...

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Autores: Fortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9, Bidegain, J. (J.)|||/items/19022081-f59e-4202-9ed2-b056a4e4b584, Robador, P.A. (Pablo A.)|||/items/35b849ed-5afe-44ce-bd97-b7bf1ba0a307, Hermida-Santos, J. (José)|||/items/9e67bdb3-d55d-4819-847e-9b44cc487fdb, Lopez-Sagaseta, J. (Jacinto)|||/items/ad7d0167-0d3c-4975-a77e-b64545be8010, Beloqui, O. (Óscar)|||/items/87d04a14-2d74-4221-8a57-12550777420d, Diez-Martinez, J. (Javier)|||/items/4f3a0e43-12bf-403d-9dc7-31fab0d11d41, Zalba-Goñi, G. (Guillermo)|||/items/71410fa2-baa5-4efc-bce7-14b4b0e23802
Tipo de recurso: artículo
Fecha de publicación:2009
País:España
Institución:Universidad de Navarra
Repositorio:Dadun. Depósito Académico Digital de la Universidad de Navarra
Idioma:inglés
OAI Identifier:oai:dadun.unav.edu:10171/18527
Acceso en línea:https://hdl.handle.net/10171/18527
Access Level:acceso abierto
Palabra clave:EXP3179
Hypertension
Losartan
Metalloproteinases
NADPH oxidase
PKC
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spelling Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertensionFortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9Bidegain, J. (J.)|||/items/19022081-f59e-4202-9ed2-b056a4e4b584Robador, P.A. (Pablo A.)|||/items/35b849ed-5afe-44ce-bd97-b7bf1ba0a307Hermida-Santos, J. (José)|||/items/9e67bdb3-d55d-4819-847e-9b44cc487fdbLopez-Sagaseta, J. (Jacinto)|||/items/ad7d0167-0d3c-4975-a77e-b64545be8010Beloqui, O. (Óscar)|||/items/87d04a14-2d74-4221-8a57-12550777420dDiez-Martinez, J. (Javier)|||/items/4f3a0e43-12bf-403d-9dc7-31fab0d11d41Zalba-Goñi, G. (Guillermo)|||/items/71410fa2-baa5-4efc-bce7-14b4b0e23802EXP3179HypertensionLosartanMetalloproteinasesNADPH oxidasePKCOxidative stress plays a critical role in the pathogenesis of hypertension. The NADPH oxidase constitutes a major source of superoxide anion in phagocytic cells, and its activation is associated with matrix metalloproteinase (MMP)-9 secretion by these cells. We investigated the effects of the angiotensin II type 1 receptor antagonist losartan and its metabolites (EXP3174 and EXP3179) on NADPH oxidase activity and MMP-9 secretion in human phagocytic cells. EXP3179, but not losartan and EXP3174, dose-dependently inhibited (P<0.05) phorbol myristate acetate and insulin-stimulated NADPH oxidase activity. EXP3179 also inhibited phorbol myristate acetate-induced NADPH oxidase in endothelial cells. In addition, EXP3179 inhibited (P<0.05) both phorbol myristate acetate-stimulated p47phox translocation from cytosol to membranes and protein kinase C activity. Affinity experiments and enzymatic assays confirmed that EXP3179 inhibited several protein kinase C isoforms. EXP3179 also inhibited (P<0.05) phorbol myristate acetate-stimulated MMP-9 secretion. In a study performed in 153 hypertensive patients, phagocytic NADPH oxidase activity was lower (P<0.05) in losartan-treated compared with untreated patients and in patients treated with other angiotensin II type 1 receptor antagonists or with angiotensin-converting enzyme inhibitors. Plasma levels of MMP-9 were lower (P<0.05) in losartan-treated hypertensives compared with the other group of patients. Thus, EXP3179 acts as a blocker of the NADPH oxidase in phagocytic cells by a potential mechanism that targets the protein kinase C signaling pathway. This effect can be involved in reduced MMP-9 secretion by these cells. It is proposed that the EXP3179 metabolite may confer to losartan the specific capacity to reduce oxidative stress mediated by phagocytic cells in hypertensive patients.American Heart AssociationDadun. Depósito Académico Digital Universidad de Navarra20112011-06-1320092009-01-0120092009-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10171/18527reponame:Dadun. Depósito Académico Digital de la Universidad de Navarrainstname:Universidad de NavarraInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:dadun.unav.edu:10171/185272026-06-21T12:47:57Z
dc.title.none.fl_str_mv Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
title Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
spellingShingle Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
Fortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9
EXP3179
Hypertension
Losartan
Metalloproteinases
NADPH oxidase
PKC
title_short Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
title_full Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
title_fullStr Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
title_full_unstemmed Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
title_sort Losartan metabolite EXP3179 blocks NADPH oxidase-mediated superoxide production by inhibiting protein kinase C: potential clinical implications in hypertension
dc.creator.none.fl_str_mv Fortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9
Bidegain, J. (J.)|||/items/19022081-f59e-4202-9ed2-b056a4e4b584
Robador, P.A. (Pablo A.)|||/items/35b849ed-5afe-44ce-bd97-b7bf1ba0a307
Hermida-Santos, J. (José)|||/items/9e67bdb3-d55d-4819-847e-9b44cc487fdb
Lopez-Sagaseta, J. (Jacinto)|||/items/ad7d0167-0d3c-4975-a77e-b64545be8010
Beloqui, O. (Óscar)|||/items/87d04a14-2d74-4221-8a57-12550777420d
Diez-Martinez, J. (Javier)|||/items/4f3a0e43-12bf-403d-9dc7-31fab0d11d41
Zalba-Goñi, G. (Guillermo)|||/items/71410fa2-baa5-4efc-bce7-14b4b0e23802
author Fortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9
author_facet Fortuño, A. (Ana)|||/items/2324831f-71b3-4d1b-afc1-594e4e1bc0c9
Bidegain, J. (J.)|||/items/19022081-f59e-4202-9ed2-b056a4e4b584
Robador, P.A. (Pablo A.)|||/items/35b849ed-5afe-44ce-bd97-b7bf1ba0a307
Hermida-Santos, J. (José)|||/items/9e67bdb3-d55d-4819-847e-9b44cc487fdb
Lopez-Sagaseta, J. (Jacinto)|||/items/ad7d0167-0d3c-4975-a77e-b64545be8010
Beloqui, O. (Óscar)|||/items/87d04a14-2d74-4221-8a57-12550777420d
Diez-Martinez, J. (Javier)|||/items/4f3a0e43-12bf-403d-9dc7-31fab0d11d41
Zalba-Goñi, G. (Guillermo)|||/items/71410fa2-baa5-4efc-bce7-14b4b0e23802
author_role author
author2 Bidegain, J. (J.)|||/items/19022081-f59e-4202-9ed2-b056a4e4b584
Robador, P.A. (Pablo A.)|||/items/35b849ed-5afe-44ce-bd97-b7bf1ba0a307
Hermida-Santos, J. (José)|||/items/9e67bdb3-d55d-4819-847e-9b44cc487fdb
Lopez-Sagaseta, J. (Jacinto)|||/items/ad7d0167-0d3c-4975-a77e-b64545be8010
Beloqui, O. (Óscar)|||/items/87d04a14-2d74-4221-8a57-12550777420d
Diez-Martinez, J. (Javier)|||/items/4f3a0e43-12bf-403d-9dc7-31fab0d11d41
Zalba-Goñi, G. (Guillermo)|||/items/71410fa2-baa5-4efc-bce7-14b4b0e23802
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Dadun. Depósito Académico Digital Universidad de Navarra
dc.subject.none.fl_str_mv EXP3179
Hypertension
Losartan
Metalloproteinases
NADPH oxidase
PKC
topic EXP3179
Hypertension
Losartan
Metalloproteinases
NADPH oxidase
PKC
description Oxidative stress plays a critical role in the pathogenesis of hypertension. The NADPH oxidase constitutes a major source of superoxide anion in phagocytic cells, and its activation is associated with matrix metalloproteinase (MMP)-9 secretion by these cells. We investigated the effects of the angiotensin II type 1 receptor antagonist losartan and its metabolites (EXP3174 and EXP3179) on NADPH oxidase activity and MMP-9 secretion in human phagocytic cells. EXP3179, but not losartan and EXP3174, dose-dependently inhibited (P<0.05) phorbol myristate acetate and insulin-stimulated NADPH oxidase activity. EXP3179 also inhibited phorbol myristate acetate-induced NADPH oxidase in endothelial cells. In addition, EXP3179 inhibited (P<0.05) both phorbol myristate acetate-stimulated p47phox translocation from cytosol to membranes and protein kinase C activity. Affinity experiments and enzymatic assays confirmed that EXP3179 inhibited several protein kinase C isoforms. EXP3179 also inhibited (P<0.05) phorbol myristate acetate-stimulated MMP-9 secretion. In a study performed in 153 hypertensive patients, phagocytic NADPH oxidase activity was lower (P<0.05) in losartan-treated compared with untreated patients and in patients treated with other angiotensin II type 1 receptor antagonists or with angiotensin-converting enzyme inhibitors. Plasma levels of MMP-9 were lower (P<0.05) in losartan-treated hypertensives compared with the other group of patients. Thus, EXP3179 acts as a blocker of the NADPH oxidase in phagocytic cells by a potential mechanism that targets the protein kinase C signaling pathway. This effect can be involved in reduced MMP-9 secretion by these cells. It is proposed that the EXP3179 metabolite may confer to losartan the specific capacity to reduce oxidative stress mediated by phagocytic cells in hypertensive patients.
publishDate 2009
dc.date.none.fl_str_mv 2009
2009-01-01
2009
2009-01-01
2011
2011-06-13
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10171/18527
url https://hdl.handle.net/10171/18527
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Heart Association
publisher.none.fl_str_mv American Heart Association
dc.source.none.fl_str_mv reponame:Dadun. Depósito Académico Digital de la Universidad de Navarra
instname:Universidad de Navarra
instname_str Universidad de Navarra
reponame_str Dadun. Depósito Académico Digital de la Universidad de Navarra
collection Dadun. Depósito Académico Digital de la Universidad de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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