Interactions between angiotensin II and nitric oxide during exercise in normal and heart failure rats

1  Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California 95616; and 2  Departments of Kinesiology and of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506 We hypothesized that nitric oxide (NO) opposes ANG II-induced...

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Veröffentlicht in:Journal of applied physiology (1985) 1999-08, Vol.87 (2), p.574-581
Hauptverfasser: Symons, J. David, Stebbins, Charles L, Musch, Timothy I
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Musch, Timothy I
description 1  Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California 95616; and 2  Departments of Kinesiology and of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506 We hypothesized that nitric oxide (NO) opposes ANG II-induced increases in arterial pressure and reductions in renal, splanchnic, and skeletal muscle vascular conductance during dynamic exercise in normal and heart failure rats. Regional blood flow and vascular conductance were measured during treadmill running before (unblocked exercise) and after 1 ) ANG II AT 1 -receptor blockade (losartan, 20 mg/kg ia), 2 ) NO synthase (NOS) inhibition [ N G -nitro- L -arginine methyl ester ( L -NAME); 10 mg/kg ia], or 3 ) ANG II AT 1 -receptor blockade + NOS inhibition (combined blockade). Renal conductance during unblocked exercise (4.79 ± 0.31 ml ·   100 g 1 · min 1 · mmHg 1 ) was increased after ANG II AT 1 -receptor blockade (6.53 ± 0.51   ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.12 ± 0.20 ml · 100 g 1 · min 1 · mmHg 1 ) and combined inhibition (3.96 ± 0.57 ml · 100 g 1 · min 1 · mmHg 1 ;all P  
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David ; Stebbins, Charles L ; Musch, Timothy I</creator><creatorcontrib>Symons, J. David ; Stebbins, Charles L ; Musch, Timothy I</creatorcontrib><description>1  Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California 95616; and 2  Departments of Kinesiology and of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506 We hypothesized that nitric oxide (NO) opposes ANG II-induced increases in arterial pressure and reductions in renal, splanchnic, and skeletal muscle vascular conductance during dynamic exercise in normal and heart failure rats. Regional blood flow and vascular conductance were measured during treadmill running before (unblocked exercise) and after 1 ) ANG II AT 1 -receptor blockade (losartan, 20 mg/kg ia), 2 ) NO synthase (NOS) inhibition [ N G -nitro- L -arginine methyl ester ( L -NAME); 10 mg/kg ia], or 3 ) ANG II AT 1 -receptor blockade + NOS inhibition (combined blockade). Renal conductance during unblocked exercise (4.79 ± 0.31 ml ·   100 g 1 · min 1 · mmHg 1 ) was increased after ANG II AT 1 -receptor blockade (6.53 ± 0.51   ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.12 ± 0.20 ml · 100 g 1 · min 1 · mmHg 1 ) and combined inhibition (3.96 ± 0.57 ml · 100 g 1 · min 1 · mmHg 1 ;all P  &lt; 0.05 vs. unblocked). In heart failure rats, renal conductance during unblocked exercise (5.50 ± 0.66 ml · 100 g 1 · min 1 · mmHg 1 ) was increased by ANG II AT 1 -receptor blockade (8.48 ± 0.83 ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.68 ± 0.22 ml · 100 g 1 · min 1 · mmHg 1 ; both P  &lt; 0.05 vs. unblocked), but it was unaltered during combined inhibition (4.65 ± 0.51 ml · 100 g 1 · min 1 · mmHg 1 ). Because our findings during combined blockade could be predicted from the independent actions of NO and ANG II, no interaction was apparent between these two substances in control or heart failure animals. In skeletal muscle, L -NAME-induced reductions in conductance, compared with unblocked exercise ( P  &lt; 0.05), were abolished during combined inhibition in heart failure but not in control rats. These observations suggest that ANG II causes vasoconstriction in skeletal muscle that is masked by NO-evoked dilation in animals with heart failure. Because reductions in vascular conductance between unblocked exercise and combined inhibition were less than would be predicted from the independent actions of NO and ANG II, an interaction exists between these two substances in heart failure rats. L -NAME-induced increases in arterial pressure during treadmill running were attenuated ( P  &lt; 0.05) similarly in both groups by combined inhibition. These findings indicate that NO opposes ANG II-induced increases in arterial pressure and in renal and skeletal muscle resistance during dynamic exercise. regional blood flow; vascular resistance; vascular conductance; N G -nitro- L -arginine methyl ester; losartan</description><identifier>ISSN: 8750-7587</identifier><identifier>EISSN: 1522-1601</identifier><identifier>DOI: 10.1152/jappl.1999.87.2.574</identifier><identifier>PMID: 10444615</identifier><identifier>CODEN: JAPHEV</identifier><language>eng</language><publisher>Bethesda, MD: Am Physiological Soc</publisher><subject>Anatomy &amp; physiology ; Angiotensin II - chemistry ; Angiotensin Receptor Antagonists ; Animals ; Biological and medical sciences ; Blood pressure ; Blood Pressure - drug effects ; Blood vessels ; Cardiology. Vascular system ; Exercise ; Female ; Gases ; Heart ; Heart Diseases - physiopathology ; Heart failure ; Heart failure, cardiogenic pulmonary edema, cardiac enlargement ; Heart Rate - drug effects ; Losartan - pharmacology ; Medical sciences ; NG-Nitroarginine Methyl Ester - pharmacology ; Nitric Oxide - chemistry ; Nitric Oxide Synthase - antagonists &amp; inhibitors ; Physical Conditioning, Animal - physiology ; Rats ; Rats, Wistar ; Receptor, Angiotensin, Type 1 ; Receptor, Angiotensin, Type 2 ; Regional Blood Flow - drug effects ; Rodents</subject><ispartof>Journal of applied physiology (1985), 1999-08, Vol.87 (2), p.574-581</ispartof><rights>1999 INIST-CNRS</rights><rights>Copyright American Physiological Society Aug 1999</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c499t-aba031d176d02527f49993d42f00c242fd0a33f01fdae5279ec3dbdc8745c83d3</citedby><cites>FETCH-LOGICAL-c499t-aba031d176d02527f49993d42f00c242fd0a33f01fdae5279ec3dbdc8745c83d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,3040,27929,27930</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=1897686$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10444615$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Symons, J. David</creatorcontrib><creatorcontrib>Stebbins, Charles L</creatorcontrib><creatorcontrib>Musch, Timothy I</creatorcontrib><title>Interactions between angiotensin II and nitric oxide during exercise in normal and heart failure rats</title><title>Journal of applied physiology (1985)</title><addtitle>J Appl Physiol (1985)</addtitle><description>1  Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California 95616; and 2  Departments of Kinesiology and of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506 We hypothesized that nitric oxide (NO) opposes ANG II-induced increases in arterial pressure and reductions in renal, splanchnic, and skeletal muscle vascular conductance during dynamic exercise in normal and heart failure rats. Regional blood flow and vascular conductance were measured during treadmill running before (unblocked exercise) and after 1 ) ANG II AT 1 -receptor blockade (losartan, 20 mg/kg ia), 2 ) NO synthase (NOS) inhibition [ N G -nitro- L -arginine methyl ester ( L -NAME); 10 mg/kg ia], or 3 ) ANG II AT 1 -receptor blockade + NOS inhibition (combined blockade). Renal conductance during unblocked exercise (4.79 ± 0.31 ml ·   100 g 1 · min 1 · mmHg 1 ) was increased after ANG II AT 1 -receptor blockade (6.53 ± 0.51   ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.12 ± 0.20 ml · 100 g 1 · min 1 · mmHg 1 ) and combined inhibition (3.96 ± 0.57 ml · 100 g 1 · min 1 · mmHg 1 ;all P  &lt; 0.05 vs. unblocked). In heart failure rats, renal conductance during unblocked exercise (5.50 ± 0.66 ml · 100 g 1 · min 1 · mmHg 1 ) was increased by ANG II AT 1 -receptor blockade (8.48 ± 0.83 ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.68 ± 0.22 ml · 100 g 1 · min 1 · mmHg 1 ; both P  &lt; 0.05 vs. unblocked), but it was unaltered during combined inhibition (4.65 ± 0.51 ml · 100 g 1 · min 1 · mmHg 1 ). Because our findings during combined blockade could be predicted from the independent actions of NO and ANG II, no interaction was apparent between these two substances in control or heart failure animals. In skeletal muscle, L -NAME-induced reductions in conductance, compared with unblocked exercise ( P  &lt; 0.05), were abolished during combined inhibition in heart failure but not in control rats. These observations suggest that ANG II causes vasoconstriction in skeletal muscle that is masked by NO-evoked dilation in animals with heart failure. Because reductions in vascular conductance between unblocked exercise and combined inhibition were less than would be predicted from the independent actions of NO and ANG II, an interaction exists between these two substances in heart failure rats. L -NAME-induced increases in arterial pressure during treadmill running were attenuated ( P  &lt; 0.05) similarly in both groups by combined inhibition. These findings indicate that NO opposes ANG II-induced increases in arterial pressure and in renal and skeletal muscle resistance during dynamic exercise. regional blood flow; vascular resistance; vascular conductance; N G -nitro- L -arginine methyl ester; losartan</description><subject>Anatomy &amp; physiology</subject><subject>Angiotensin II - chemistry</subject><subject>Angiotensin Receptor Antagonists</subject><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Blood pressure</subject><subject>Blood Pressure - drug effects</subject><subject>Blood vessels</subject><subject>Cardiology. Vascular system</subject><subject>Exercise</subject><subject>Female</subject><subject>Gases</subject><subject>Heart</subject><subject>Heart Diseases - physiopathology</subject><subject>Heart failure</subject><subject>Heart failure, cardiogenic pulmonary edema, cardiac enlargement</subject><subject>Heart Rate - drug effects</subject><subject>Losartan - pharmacology</subject><subject>Medical sciences</subject><subject>NG-Nitroarginine Methyl Ester - pharmacology</subject><subject>Nitric Oxide - chemistry</subject><subject>Nitric Oxide Synthase - antagonists &amp; inhibitors</subject><subject>Physical Conditioning, Animal - physiology</subject><subject>Rats</subject><subject>Rats, Wistar</subject><subject>Receptor, Angiotensin, Type 1</subject><subject>Receptor, Angiotensin, Type 2</subject><subject>Regional Blood Flow - drug effects</subject><subject>Rodents</subject><issn>8750-7587</issn><issn>1522-1601</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kd-LEzEQx4MoXj39CwQJIvrUNT92N5tHOTwtHPhyPoc0mW1T0mRNslz735teKx6CT8PMfL4zw3wRektJQ2nHPu_0NPmGSimbQTSs6UT7DC1qhy1pT-hztBhER5aiG8QVepXzjhDath19ia4oadu2p90CwSoUSNoUF0PGaygPAAHrsHGxQMgu4NWqphYHV5IzOB6cBWzn5MIGwwGScRlwxUJMe-0f0S3oVPConZ8T4KRLfo1ejNpneHOJ1-jn7df7m-_Lux_fVjdf7pamlbIs9VoTTi0VvSWsY2KsVclty0ZCDKvBEs35SOhoNdS-BMPt2ppBtJ0ZuOXX6ON57pTirxlyUXuXDXivA8Q5q17KXnSMV_D9P-AuzinU2xRjjPYDJbRC_AyZFHNOMKopub1OR0WJOlmgHi1QJwvUIBRT1YKqencZPa_3YJ9ozj-vwIcLoLPRfkw61Cf-5QYp-qGv2KcztnWb7YNLoKbtMbvo4-Z4Wvx0I_8_eTt7fw-HcpL8UajJjvw3hV2xjg</recordid><startdate>19990801</startdate><enddate>19990801</enddate><creator>Symons, J. David</creator><creator>Stebbins, Charles L</creator><creator>Musch, Timothy I</creator><general>Am Physiological Soc</general><general>American Physiological Society</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>7QP</scope><scope>7QR</scope><scope>7TK</scope><scope>7TS</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>19990801</creationdate><title>Interactions between angiotensin II and nitric oxide during exercise in normal and heart failure rats</title><author>Symons, J. David ; Stebbins, Charles L ; Musch, Timothy I</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c499t-aba031d176d02527f49993d42f00c242fd0a33f01fdae5279ec3dbdc8745c83d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Anatomy &amp; physiology</topic><topic>Angiotensin II - chemistry</topic><topic>Angiotensin Receptor Antagonists</topic><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Blood pressure</topic><topic>Blood Pressure - drug effects</topic><topic>Blood vessels</topic><topic>Cardiology. Vascular system</topic><topic>Exercise</topic><topic>Female</topic><topic>Gases</topic><topic>Heart</topic><topic>Heart Diseases - physiopathology</topic><topic>Heart failure</topic><topic>Heart failure, cardiogenic pulmonary edema, cardiac enlargement</topic><topic>Heart Rate - drug effects</topic><topic>Losartan - pharmacology</topic><topic>Medical sciences</topic><topic>NG-Nitroarginine Methyl Ester - pharmacology</topic><topic>Nitric Oxide - chemistry</topic><topic>Nitric Oxide Synthase - antagonists &amp; inhibitors</topic><topic>Physical Conditioning, Animal - physiology</topic><topic>Rats</topic><topic>Rats, Wistar</topic><topic>Receptor, Angiotensin, Type 1</topic><topic>Receptor, Angiotensin, Type 2</topic><topic>Regional Blood Flow - drug effects</topic><topic>Rodents</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Symons, J. David</creatorcontrib><creatorcontrib>Stebbins, Charles L</creatorcontrib><creatorcontrib>Musch, Timothy I</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Calcium &amp; Calcified Tissue Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Neurosciences Abstracts</collection><collection>Physical Education Index</collection><collection>Toxicology Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of applied physiology (1985)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Symons, J. David</au><au>Stebbins, Charles L</au><au>Musch, Timothy I</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interactions between angiotensin II and nitric oxide during exercise in normal and heart failure rats</atitle><jtitle>Journal of applied physiology (1985)</jtitle><addtitle>J Appl Physiol (1985)</addtitle><date>1999-08-01</date><risdate>1999</risdate><volume>87</volume><issue>2</issue><spage>574</spage><epage>581</epage><pages>574-581</pages><issn>8750-7587</issn><eissn>1522-1601</eissn><coden>JAPHEV</coden><abstract>1  Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California 95616; and 2  Departments of Kinesiology and of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506 We hypothesized that nitric oxide (NO) opposes ANG II-induced increases in arterial pressure and reductions in renal, splanchnic, and skeletal muscle vascular conductance during dynamic exercise in normal and heart failure rats. Regional blood flow and vascular conductance were measured during treadmill running before (unblocked exercise) and after 1 ) ANG II AT 1 -receptor blockade (losartan, 20 mg/kg ia), 2 ) NO synthase (NOS) inhibition [ N G -nitro- L -arginine methyl ester ( L -NAME); 10 mg/kg ia], or 3 ) ANG II AT 1 -receptor blockade + NOS inhibition (combined blockade). Renal conductance during unblocked exercise (4.79 ± 0.31 ml ·   100 g 1 · min 1 · mmHg 1 ) was increased after ANG II AT 1 -receptor blockade (6.53 ± 0.51   ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.12 ± 0.20 ml · 100 g 1 · min 1 · mmHg 1 ) and combined inhibition (3.96 ± 0.57 ml · 100 g 1 · min 1 · mmHg 1 ;all P  &lt; 0.05 vs. unblocked). In heart failure rats, renal conductance during unblocked exercise (5.50 ± 0.66 ml · 100 g 1 · min 1 · mmHg 1 ) was increased by ANG II AT 1 -receptor blockade (8.48 ± 0.83 ml · 100 g 1 · min 1 · mmHg 1 ) and decreased by NOS inhibition (2.68 ± 0.22 ml · 100 g 1 · min 1 · mmHg 1 ; both P  &lt; 0.05 vs. unblocked), but it was unaltered during combined inhibition (4.65 ± 0.51 ml · 100 g 1 · min 1 · mmHg 1 ). Because our findings during combined blockade could be predicted from the independent actions of NO and ANG II, no interaction was apparent between these two substances in control or heart failure animals. In skeletal muscle, L -NAME-induced reductions in conductance, compared with unblocked exercise ( P  &lt; 0.05), were abolished during combined inhibition in heart failure but not in control rats. These observations suggest that ANG II causes vasoconstriction in skeletal muscle that is masked by NO-evoked dilation in animals with heart failure. Because reductions in vascular conductance between unblocked exercise and combined inhibition were less than would be predicted from the independent actions of NO and ANG II, an interaction exists between these two substances in heart failure rats. L -NAME-induced increases in arterial pressure during treadmill running were attenuated ( P  &lt; 0.05) similarly in both groups by combined inhibition. These findings indicate that NO opposes ANG II-induced increases in arterial pressure and in renal and skeletal muscle resistance during dynamic exercise. regional blood flow; vascular resistance; vascular conductance; N G -nitro- L -arginine methyl ester; losartan</abstract><cop>Bethesda, MD</cop><pub>Am Physiological Soc</pub><pmid>10444615</pmid><doi>10.1152/jappl.1999.87.2.574</doi><tpages>8</tpages></addata></record>
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source MEDLINE; American Physiological Society; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection
subjects Anatomy & physiology
Angiotensin II - chemistry
Angiotensin Receptor Antagonists
Animals
Biological and medical sciences
Blood pressure
Blood Pressure - drug effects
Blood vessels
Cardiology. Vascular system
Exercise
Female
Gases
Heart
Heart Diseases - physiopathology
Heart failure
Heart failure, cardiogenic pulmonary edema, cardiac enlargement
Heart Rate - drug effects
Losartan - pharmacology
Medical sciences
NG-Nitroarginine Methyl Ester - pharmacology
Nitric Oxide - chemistry
Nitric Oxide Synthase - antagonists & inhibitors
Physical Conditioning, Animal - physiology
Rats
Rats, Wistar
Receptor, Angiotensin, Type 1
Receptor, Angiotensin, Type 2
Regional Blood Flow - drug effects
Rodents
title Interactions between angiotensin II and nitric oxide during exercise in normal and heart failure rats
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