Antioxidant Effect of Adrenomedullin on Angiotensin II-Induced Reactive Oxygen Species Generation in Vascular Smooth Muscle Cells

Recent adrenomedullin (AM) gene-targeting studies have proposed a novel concept that AM plays a protective role against oxidative stress in vivo. The present study was undertaken to explore the underlying molecular mechanism of the putative antioxidant action of AM against angiotensin II (Ang II)ind...

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Veröffentlicht in:Endocrinology (Philadelphia) 2004-07, Vol.145 (7), p.3331-3337
Hauptverfasser: Yoshimoto, Takanobu, Fukai, Nozomi, Sato, Ryuji, Sugiyama, Toru, Ozawa, Naoko, Shichiri, Masayoshi, Hirata, Yukio
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container_issue 7
container_start_page 3331
container_title Endocrinology (Philadelphia)
container_volume 145
creator Yoshimoto, Takanobu
Fukai, Nozomi
Sato, Ryuji
Sugiyama, Toru
Ozawa, Naoko
Shichiri, Masayoshi
Hirata, Yukio
description Recent adrenomedullin (AM) gene-targeting studies have proposed a novel concept that AM plays a protective role against oxidative stress in vivo. The present study was undertaken to explore the underlying molecular mechanism of the putative antioxidant action of AM against angiotensin II (Ang II)induced reactive oxygen species (ROS) generation in rat vascular smooth muscle cells (VSMCs). Intracellular ROS levels were measured by dichlorofluoroscein fluorescence. Redox-sensitive c-Jun amino-terminal kinase (JNK) and ERK1/2 activation and gene expression induced by Ang II in VSMCs were also studied. AM dose-relatedly (10−8–10−7 m) inhibited intracellular ROS generation stimulated by Ang II (10−7 m), as mimicked by dibutyl-cAMP, the effect of which was inhibited by the pretreatment with N-(2-[p-bromocinnamylamino]ethyl)-5-isoquinolinesulfonamide hydrochloride, a protein kinase A inhibitor, and calcitonin gene-related peptide(8–37), an AM/calcitonin gene-related peptide receptor antagonist. Ang II induced JNK and ERK1/2 activation via a redox-sensitive manner, whereas AM inhibited JNK, but not ERK1/2, activation by Ang II. Furthermore, AM inhibited Ang II-induced redox-sensitive gene expression (plasminogen activator inhibitor-1 and monocyte chemoattractant protein-1) in the same manner as N-acetyl-l-cysteine, a potent antioxidant. AM also inhibited Ang II-induced up-regulation of Nox1, a critical membrane-bound component of reduced nicotinamide adenine dinucleotide phosphate oxidase in VSMCs, in the same degree as N-acetyl-l-cysteine. Our study demonstrates for the first time that AM directly inhibits intracellular ROS generation via an AM receptor-mediated and c-AMP-protein kinase A-dependent mechanism in VSMCs and that AM with its potent antioxidant action inhibits redox-sensitive JNK activation and gene expression induced by Ang II. These data suggest that AM plays a protective role as an endogenous antioxidant in Ang II-induced vascular injury.
doi_str_mv 10.1210/en.2003-1583
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The present study was undertaken to explore the underlying molecular mechanism of the putative antioxidant action of AM against angiotensin II (Ang II)induced reactive oxygen species (ROS) generation in rat vascular smooth muscle cells (VSMCs). Intracellular ROS levels were measured by dichlorofluoroscein fluorescence. Redox-sensitive c-Jun amino-terminal kinase (JNK) and ERK1/2 activation and gene expression induced by Ang II in VSMCs were also studied. AM dose-relatedly (10−8–10−7 m) inhibited intracellular ROS generation stimulated by Ang II (10−7 m), as mimicked by dibutyl-cAMP, the effect of which was inhibited by the pretreatment with N-(2-[p-bromocinnamylamino]ethyl)-5-isoquinolinesulfonamide hydrochloride, a protein kinase A inhibitor, and calcitonin gene-related peptide(8–37), an AM/calcitonin gene-related peptide receptor antagonist. Ang II induced JNK and ERK1/2 activation via a redox-sensitive manner, whereas AM inhibited JNK, but not ERK1/2, activation by Ang II. Furthermore, AM inhibited Ang II-induced redox-sensitive gene expression (plasminogen activator inhibitor-1 and monocyte chemoattractant protein-1) in the same manner as N-acetyl-l-cysteine, a potent antioxidant. AM also inhibited Ang II-induced up-regulation of Nox1, a critical membrane-bound component of reduced nicotinamide adenine dinucleotide phosphate oxidase in VSMCs, in the same degree as N-acetyl-l-cysteine. Our study demonstrates for the first time that AM directly inhibits intracellular ROS generation via an AM receptor-mediated and c-AMP-protein kinase A-dependent mechanism in VSMCs and that AM with its potent antioxidant action inhibits redox-sensitive JNK activation and gene expression induced by Ang II. 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Psychology ; Gene expression ; In vivo methods and tests ; Intracellular ; JNK Mitogen-Activated Protein Kinases ; Kinases ; Male ; Mitogen-Activated Protein Kinase 1 - metabolism ; Mitogen-Activated Protein Kinase 3 ; Mitogen-Activated Protein Kinases - metabolism ; Molecular modelling ; Monocyte chemoattractant protein ; Monocyte chemoattractant protein 1 ; Monocytes ; Muscle, Smooth, Vascular - cytology ; Muscle, Smooth, Vascular - drug effects ; Muscle, Smooth, Vascular - metabolism ; NAD(P)H oxidase ; NADH, NADPH Oxidoreductases - genetics ; NADPH Oxidase 1 ; NADPH-diaphorase ; Nicotinamide ; Nicotinamide adenine dinucleotide ; Oxidation-Reduction ; Oxidative stress ; Oxygen ; Peptides ; Peptides - pharmacology ; Plasminogen Activator Inhibitor 1 - genetics ; Plasminogen activator inhibitors ; Protein kinase A ; Protein kinase A inhibitors ; Proteins ; Rats ; Rats, Sprague-Dawley ; Reactive oxygen species ; Reactive Oxygen Species - metabolism ; Receptors ; Receptors, Adrenomedullin ; Receptors, Peptide - metabolism ; RNA, Messenger - analysis ; Smooth muscle ; Transcription factors ; Vasoconstrictor Agents - pharmacology ; Vertebrates: endocrinology</subject><ispartof>Endocrinology (Philadelphia), 2004-07, Vol.145 (7), p.3331-3337</ispartof><rights>Copyright © 2004 by The Endocrine Society 2004</rights><rights>2004 INIST-CNRS</rights><rights>Copyright © 2004 by The Endocrine Society</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c525t-5edfe54beeaaa28345fc24aee0c6d42e3b6b689e2af0f1c0d033cef69e8ba9773</citedby><cites>FETCH-LOGICAL-c525t-5edfe54beeaaa28345fc24aee0c6d42e3b6b689e2af0f1c0d033cef69e8ba9773</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=15880306$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15070851$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Yoshimoto, Takanobu</creatorcontrib><creatorcontrib>Fukai, Nozomi</creatorcontrib><creatorcontrib>Sato, Ryuji</creatorcontrib><creatorcontrib>Sugiyama, Toru</creatorcontrib><creatorcontrib>Ozawa, Naoko</creatorcontrib><creatorcontrib>Shichiri, Masayoshi</creatorcontrib><creatorcontrib>Hirata, Yukio</creatorcontrib><title>Antioxidant Effect of Adrenomedullin on Angiotensin II-Induced Reactive Oxygen Species Generation in Vascular Smooth Muscle Cells</title><title>Endocrinology (Philadelphia)</title><addtitle>Endocrinology</addtitle><description>Recent adrenomedullin (AM) gene-targeting studies have proposed a novel concept that AM plays a protective role against oxidative stress in vivo. The present study was undertaken to explore the underlying molecular mechanism of the putative antioxidant action of AM against angiotensin II (Ang II)induced reactive oxygen species (ROS) generation in rat vascular smooth muscle cells (VSMCs). Intracellular ROS levels were measured by dichlorofluoroscein fluorescence. Redox-sensitive c-Jun amino-terminal kinase (JNK) and ERK1/2 activation and gene expression induced by Ang II in VSMCs were also studied. AM dose-relatedly (10−8–10−7 m) inhibited intracellular ROS generation stimulated by Ang II (10−7 m), as mimicked by dibutyl-cAMP, the effect of which was inhibited by the pretreatment with N-(2-[p-bromocinnamylamino]ethyl)-5-isoquinolinesulfonamide hydrochloride, a protein kinase A inhibitor, and calcitonin gene-related peptide(8–37), an AM/calcitonin gene-related peptide receptor antagonist. Ang II induced JNK and ERK1/2 activation via a redox-sensitive manner, whereas AM inhibited JNK, but not ERK1/2, activation by Ang II. Furthermore, AM inhibited Ang II-induced redox-sensitive gene expression (plasminogen activator inhibitor-1 and monocyte chemoattractant protein-1) in the same manner as N-acetyl-l-cysteine, a potent antioxidant. AM also inhibited Ang II-induced up-regulation of Nox1, a critical membrane-bound component of reduced nicotinamide adenine dinucleotide phosphate oxidase in VSMCs, in the same degree as N-acetyl-l-cysteine. Our study demonstrates for the first time that AM directly inhibits intracellular ROS generation via an AM receptor-mediated and c-AMP-protein kinase A-dependent mechanism in VSMCs and that AM with its potent antioxidant action inhibits redox-sensitive JNK activation and gene expression induced by Ang II. These data suggest that AM plays a protective role as an endogenous antioxidant in Ang II-induced vascular injury.</description><subject>Acetylcysteine</subject><subject>Activation analysis</subject><subject>Adenine</subject><subject>Adrenomedullin</subject><subject>Angiotensin</subject><subject>Angiotensin II</subject><subject>Angiotensin II - pharmacology</subject><subject>Animals</subject><subject>Antioxidants</subject><subject>Antioxidants - pharmacology</subject><subject>Aorta, Thoracic - cytology</subject><subject>Biological and medical sciences</subject><subject>Calcitonin</subject><subject>Calcitonin gene-related peptide</subject><subject>Cells, Cultured</subject><subject>Chemokine CCL2 - genetics</subject><subject>Cyclic AMP-Dependent Protein Kinases - metabolism</subject><subject>Cysteine</subject><subject>Extracellular signal-regulated kinase</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Gene expression</subject><subject>In vivo methods and tests</subject><subject>Intracellular</subject><subject>JNK Mitogen-Activated Protein Kinases</subject><subject>Kinases</subject><subject>Male</subject><subject>Mitogen-Activated Protein Kinase 1 - metabolism</subject><subject>Mitogen-Activated Protein Kinase 3</subject><subject>Mitogen-Activated Protein Kinases - metabolism</subject><subject>Molecular modelling</subject><subject>Monocyte chemoattractant protein</subject><subject>Monocyte chemoattractant protein 1</subject><subject>Monocytes</subject><subject>Muscle, Smooth, Vascular - cytology</subject><subject>Muscle, Smooth, Vascular - drug effects</subject><subject>Muscle, Smooth, Vascular - metabolism</subject><subject>NAD(P)H oxidase</subject><subject>NADH, NADPH Oxidoreductases - genetics</subject><subject>NADPH Oxidase 1</subject><subject>NADPH-diaphorase</subject><subject>Nicotinamide</subject><subject>Nicotinamide adenine dinucleotide</subject><subject>Oxidation-Reduction</subject><subject>Oxidative stress</subject><subject>Oxygen</subject><subject>Peptides</subject><subject>Peptides - pharmacology</subject><subject>Plasminogen Activator Inhibitor 1 - genetics</subject><subject>Plasminogen activator inhibitors</subject><subject>Protein kinase A</subject><subject>Protein kinase A inhibitors</subject><subject>Proteins</subject><subject>Rats</subject><subject>Rats, Sprague-Dawley</subject><subject>Reactive oxygen species</subject><subject>Reactive Oxygen Species - metabolism</subject><subject>Receptors</subject><subject>Receptors, Adrenomedullin</subject><subject>Receptors, Peptide - metabolism</subject><subject>RNA, Messenger - analysis</subject><subject>Smooth muscle</subject><subject>Transcription factors</subject><subject>Vasoconstrictor Agents - pharmacology</subject><subject>Vertebrates: endocrinology</subject><issn>0013-7227</issn><issn>1945-7170</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kUFr3DAQhUVpaLZpbz0XQWl7idORZNna47Ik6UJKoGl7NbI8ShW8kiPZJTnmn0fLGhJKexoGvnnzZh4h7xicMM7gC_oTDiAKJpV4QRZsWcqiZjW8JAsAJoqa8_qQvE7pJrdlWYpX5JBJqEFJtiAPKz-6cOc67Ud6ai2akQZLV11EH7bYTX3vPA2ervy1CyP6lNvNptj4bjLY0e-ozej-IL28u79GT68GNA4TPUePUWdpT_PAL53M1OtIr7YhjL_ptymZHuka-z69IQdW9wnfzvWI_Dw7_bH-Wlxcnm_Wq4vCSC7HQmJnUZYtotaaK1FKa3ipEcFUXclRtFVbqSVybcEyAx0IYdBWS1StXta1OCKf9rpDDLcTprHZumSyA-0xTKmpOfCKc8jgh7_AmzBFn701ggmQChTs5I73lIkhpYi2GaLb6njfMGh2wTTom10wzS6YjL-fRac2v_UJnpPIwMcZyL_SvY3aG5eecUqBgCpzn_dcmIb_rSzmlWJPou-Cic7jEDGlp2v-afQRE9-0XA</recordid><startdate>20040701</startdate><enddate>20040701</enddate><creator>Yoshimoto, Takanobu</creator><creator>Fukai, Nozomi</creator><creator>Sato, Ryuji</creator><creator>Sugiyama, Toru</creator><creator>Ozawa, Naoko</creator><creator>Shichiri, Masayoshi</creator><creator>Hirata, Yukio</creator><general>Endocrine Society</general><general>Oxford University Press</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7QP</scope><scope>7QR</scope><scope>7T5</scope><scope>7TM</scope><scope>7TO</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>K9.</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>20040701</creationdate><title>Antioxidant Effect of Adrenomedullin on Angiotensin II-Induced Reactive Oxygen Species Generation in Vascular Smooth Muscle Cells</title><author>Yoshimoto, Takanobu ; Fukai, Nozomi ; Sato, Ryuji ; Sugiyama, Toru ; Ozawa, Naoko ; Shichiri, Masayoshi ; Hirata, Yukio</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c525t-5edfe54beeaaa28345fc24aee0c6d42e3b6b689e2af0f1c0d033cef69e8ba9773</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Acetylcysteine</topic><topic>Activation analysis</topic><topic>Adenine</topic><topic>Adrenomedullin</topic><topic>Angiotensin</topic><topic>Angiotensin II</topic><topic>Angiotensin II - pharmacology</topic><topic>Animals</topic><topic>Antioxidants</topic><topic>Antioxidants - pharmacology</topic><topic>Aorta, Thoracic - cytology</topic><topic>Biological and medical sciences</topic><topic>Calcitonin</topic><topic>Calcitonin gene-related peptide</topic><topic>Cells, Cultured</topic><topic>Chemokine CCL2 - genetics</topic><topic>Cyclic AMP-Dependent Protein Kinases - metabolism</topic><topic>Cysteine</topic><topic>Extracellular signal-regulated kinase</topic><topic>Fundamental and applied biological sciences. 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The present study was undertaken to explore the underlying molecular mechanism of the putative antioxidant action of AM against angiotensin II (Ang II)induced reactive oxygen species (ROS) generation in rat vascular smooth muscle cells (VSMCs). Intracellular ROS levels were measured by dichlorofluoroscein fluorescence. Redox-sensitive c-Jun amino-terminal kinase (JNK) and ERK1/2 activation and gene expression induced by Ang II in VSMCs were also studied. AM dose-relatedly (10−8–10−7 m) inhibited intracellular ROS generation stimulated by Ang II (10−7 m), as mimicked by dibutyl-cAMP, the effect of which was inhibited by the pretreatment with N-(2-[p-bromocinnamylamino]ethyl)-5-isoquinolinesulfonamide hydrochloride, a protein kinase A inhibitor, and calcitonin gene-related peptide(8–37), an AM/calcitonin gene-related peptide receptor antagonist. Ang II induced JNK and ERK1/2 activation via a redox-sensitive manner, whereas AM inhibited JNK, but not ERK1/2, activation by Ang II. Furthermore, AM inhibited Ang II-induced redox-sensitive gene expression (plasminogen activator inhibitor-1 and monocyte chemoattractant protein-1) in the same manner as N-acetyl-l-cysteine, a potent antioxidant. AM also inhibited Ang II-induced up-regulation of Nox1, a critical membrane-bound component of reduced nicotinamide adenine dinucleotide phosphate oxidase in VSMCs, in the same degree as N-acetyl-l-cysteine. Our study demonstrates for the first time that AM directly inhibits intracellular ROS generation via an AM receptor-mediated and c-AMP-protein kinase A-dependent mechanism in VSMCs and that AM with its potent antioxidant action inhibits redox-sensitive JNK activation and gene expression induced by Ang II. These data suggest that AM plays a protective role as an endogenous antioxidant in Ang II-induced vascular injury.</abstract><cop>Bethesda, MD</cop><pub>Endocrine Society</pub><pmid>15070851</pmid><doi>10.1210/en.2003-1583</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; EZB-FREE-00999 freely available EZB journals
subjects Acetylcysteine
Activation analysis
Adenine
Adrenomedullin
Angiotensin
Angiotensin II
Angiotensin II - pharmacology
Animals
Antioxidants
Antioxidants - pharmacology
Aorta, Thoracic - cytology
Biological and medical sciences
Calcitonin
Calcitonin gene-related peptide
Cells, Cultured
Chemokine CCL2 - genetics
Cyclic AMP-Dependent Protein Kinases - metabolism
Cysteine
Extracellular signal-regulated kinase
Fundamental and applied biological sciences. Psychology
Gene expression
In vivo methods and tests
Intracellular
JNK Mitogen-Activated Protein Kinases
Kinases
Male
Mitogen-Activated Protein Kinase 1 - metabolism
Mitogen-Activated Protein Kinase 3
Mitogen-Activated Protein Kinases - metabolism
Molecular modelling
Monocyte chemoattractant protein
Monocyte chemoattractant protein 1
Monocytes
Muscle, Smooth, Vascular - cytology
Muscle, Smooth, Vascular - drug effects
Muscle, Smooth, Vascular - metabolism
NAD(P)H oxidase
NADH, NADPH Oxidoreductases - genetics
NADPH Oxidase 1
NADPH-diaphorase
Nicotinamide
Nicotinamide adenine dinucleotide
Oxidation-Reduction
Oxidative stress
Oxygen
Peptides
Peptides - pharmacology
Plasminogen Activator Inhibitor 1 - genetics
Plasminogen activator inhibitors
Protein kinase A
Protein kinase A inhibitors
Proteins
Rats
Rats, Sprague-Dawley
Reactive oxygen species
Reactive Oxygen Species - metabolism
Receptors
Receptors, Adrenomedullin
Receptors, Peptide - metabolism
RNA, Messenger - analysis
Smooth muscle
Transcription factors
Vasoconstrictor Agents - pharmacology
Vertebrates: endocrinology
title Antioxidant Effect of Adrenomedullin on Angiotensin II-Induced Reactive Oxygen Species Generation in Vascular Smooth Muscle Cells
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