Consequences of reduced production of NO on vascular reactivity of porcine coronary arteries after angioplasty: importance of EDHF

The consequences of the reduced production of nitric oxide (NO) by cells from regenerated endothelium were investigated by measuring membrane potential of smooth muscle cells (SMCs), isometric tension and cyclic nucleotides content in porcine coronary arteries with intimal thickening, four weeks fol...

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Veröffentlicht in:British journal of pharmacology 2002-08, Vol.136 (8), p.1153-1161
Hauptverfasser: Thollon, Catherine, Fournet‐Bourguignon, Marie Pierre, Saboureau, Delphine, Lesage, Ludovic, Reure, Hélène, Vanhoutte, Paul M, Vilaine, Jean Paul
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container_end_page 1161
container_issue 8
container_start_page 1153
container_title British journal of pharmacology
container_volume 136
creator Thollon, Catherine
Fournet‐Bourguignon, Marie Pierre
Saboureau, Delphine
Lesage, Ludovic
Reure, Hélène
Vanhoutte, Paul M
Vilaine, Jean Paul
description The consequences of the reduced production of nitric oxide (NO) by cells from regenerated endothelium were investigated by measuring membrane potential of smooth muscle cells (SMCs), isometric tension and cyclic nucleotides content in porcine coronary arteries with intimal thickening, four weeks following angioplasty. Under basal conditions, SMCs of coronary arteries with regenerated endothelium were depolarized by 10 mV. This depolarization was associated with 82% decreased level of cGMP without alteration in cAMP. Sodium nitroprusside (SNP, 1 μM) repolarized SMCs of the previously denuded coronary arteries. This repolarization was abolished by 1H‐[1,2,4]‐oxadiazolo[4,3‐a]quinoxalin‐1‐one (ODQ, 10 μM) and not suppressed by glibenclamide (10 μM), iberiotoxin (IbTX, 100 nM) and the combination of charybdotoxin (ChTX, 40 nM) plus apamin (100 nM). Four‐aminopyridine (4‐AP, 1‐5 mM) generated spontaneous rhythmic activities only in coronary arteries with regenerated endothelium which were abolished by SNP. Nevertheless, 4‐AP did not suppress the repolarization induced by SNP. In vascular segments with regenerated endothelium, contracted with prostaglandin F2α (PGF2α), relaxation to bradykinin (BK, 30 nM) was unaltered despite a reduced production of cGMP (−70%). Indomethacin (10 μM) plus Nω‐nitro‐L‐arginine (L‐NA, 30 μM) reduced relaxation (−12% and −35% for native and regenerated endothelium, respectively) but did not abolish it. The hyperpolarizations induced by BK were not altered by the presence of indomethacin and L‐NA and were unchanged in segments with regenerated endothelium. These data are consistent with a contribution of impairment in NO production to the depolarization of SMCs. Nevertheless, EDHF responses to BK are sufficient to maintain a normal relaxation after angioplasty. British Journal of Pharmacology (2002) 136, 1153–1161. doi:10.1038/sj.bjp.0704828
doi_str_mv 10.1038/sj.bjp.0704828
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Indomethacin (10 μM) plus Nω‐nitro‐L‐arginine (L‐NA, 30 μM) reduced relaxation (−12% and −35% for native and regenerated endothelium, respectively) but did not abolish it. The hyperpolarizations induced by BK were not altered by the presence of indomethacin and L‐NA and were unchanged in segments with regenerated endothelium. These data are consistent with a contribution of impairment in NO production to the depolarization of SMCs. Nevertheless, EDHF responses to BK are sufficient to maintain a normal relaxation after angioplasty. 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Psychology ; In Vitro Techniques ; Isometric Contraction - drug effects ; Membrane Potentials ; Muscle Relaxation - drug effects ; Muscle, Smooth, Vascular - drug effects ; Muscle, Smooth, Vascular - metabolism ; Muscle, Smooth, Vascular - physiology ; nitric oxide ; Nitric Oxide - biosynthesis ; Nitric Oxide Donors - pharmacology ; Nitroprusside - pharmacology ; Potassium Channels - drug effects ; Regenerated endothelium ; Regeneration ; Swine ; Vasodilator Agents - pharmacology ; Vertebrates: cardiovascular system</subject><ispartof>British journal of pharmacology, 2002-08, Vol.136 (8), p.1153-1161</ispartof><rights>2002 British Pharmacological Society</rights><rights>2002 INIST-CNRS</rights><rights>Copyright Nature Publishing Group Aug 2002</rights><rights>Copyright 2002, Nature Publishing Group 2002 Nature Publishing Group</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4879-d4d0893842b38e3530d157435b28c8deae7c7384b681f8f08cabd600f2b4ea393</citedby><cites>FETCH-LOGICAL-c4879-d4d0893842b38e3530d157435b28c8deae7c7384b681f8f08cabd600f2b4ea393</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1573455/pdf/$$EPDF$$P50$$Gpubmedcentral$$H</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC1573455/$$EHTML$$P50$$Gpubmedcentral$$H</linktohtml><link.rule.ids>230,315,729,782,786,887,1419,1435,27931,27932,45581,45582,46416,46840,53798,53800</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=13849087$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12163348$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Thollon, Catherine</creatorcontrib><creatorcontrib>Fournet‐Bourguignon, Marie Pierre</creatorcontrib><creatorcontrib>Saboureau, Delphine</creatorcontrib><creatorcontrib>Lesage, Ludovic</creatorcontrib><creatorcontrib>Reure, Hélène</creatorcontrib><creatorcontrib>Vanhoutte, Paul M</creatorcontrib><creatorcontrib>Vilaine, Jean Paul</creatorcontrib><title>Consequences of reduced production of NO on vascular reactivity of porcine coronary arteries after angioplasty: importance of EDHF</title><title>British journal of pharmacology</title><addtitle>Br J Pharmacol</addtitle><description>The consequences of the reduced production of nitric oxide (NO) by cells from regenerated endothelium were investigated by measuring membrane potential of smooth muscle cells (SMCs), isometric tension and cyclic nucleotides content in porcine coronary arteries with intimal thickening, four weeks following angioplasty. Under basal conditions, SMCs of coronary arteries with regenerated endothelium were depolarized by 10 mV. This depolarization was associated with 82% decreased level of cGMP without alteration in cAMP. Sodium nitroprusside (SNP, 1 μM) repolarized SMCs of the previously denuded coronary arteries. This repolarization was abolished by 1H‐[1,2,4]‐oxadiazolo[4,3‐a]quinoxalin‐1‐one (ODQ, 10 μM) and not suppressed by glibenclamide (10 μM), iberiotoxin (IbTX, 100 nM) and the combination of charybdotoxin (ChTX, 40 nM) plus apamin (100 nM). Four‐aminopyridine (4‐AP, 1‐5 mM) generated spontaneous rhythmic activities only in coronary arteries with regenerated endothelium which were abolished by SNP. Nevertheless, 4‐AP did not suppress the repolarization induced by SNP. In vascular segments with regenerated endothelium, contracted with prostaglandin F2α (PGF2α), relaxation to bradykinin (BK, 30 nM) was unaltered despite a reduced production of cGMP (−70%). Indomethacin (10 μM) plus Nω‐nitro‐L‐arginine (L‐NA, 30 μM) reduced relaxation (−12% and −35% for native and regenerated endothelium, respectively) but did not abolish it. The hyperpolarizations induced by BK were not altered by the presence of indomethacin and L‐NA and were unchanged in segments with regenerated endothelium. These data are consistent with a contribution of impairment in NO production to the depolarization of SMCs. Nevertheless, EDHF responses to BK are sufficient to maintain a normal relaxation after angioplasty. 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Under basal conditions, SMCs of coronary arteries with regenerated endothelium were depolarized by 10 mV. This depolarization was associated with 82% decreased level of cGMP without alteration in cAMP. Sodium nitroprusside (SNP, 1 μM) repolarized SMCs of the previously denuded coronary arteries. This repolarization was abolished by 1H‐[1,2,4]‐oxadiazolo[4,3‐a]quinoxalin‐1‐one (ODQ, 10 μM) and not suppressed by glibenclamide (10 μM), iberiotoxin (IbTX, 100 nM) and the combination of charybdotoxin (ChTX, 40 nM) plus apamin (100 nM). Four‐aminopyridine (4‐AP, 1‐5 mM) generated spontaneous rhythmic activities only in coronary arteries with regenerated endothelium which were abolished by SNP. Nevertheless, 4‐AP did not suppress the repolarization induced by SNP. In vascular segments with regenerated endothelium, contracted with prostaglandin F2α (PGF2α), relaxation to bradykinin (BK, 30 nM) was unaltered despite a reduced production of cGMP (−70%). Indomethacin (10 μM) plus Nω‐nitro‐L‐arginine (L‐NA, 30 μM) reduced relaxation (−12% and −35% for native and regenerated endothelium, respectively) but did not abolish it. The hyperpolarizations induced by BK were not altered by the presence of indomethacin and L‐NA and were unchanged in segments with regenerated endothelium. These data are consistent with a contribution of impairment in NO production to the depolarization of SMCs. Nevertheless, EDHF responses to BK are sufficient to maintain a normal relaxation after angioplasty. British Journal of Pharmacology (2002) 136, 1153–1161. doi:10.1038/sj.bjp.0704828</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>12163348</pmid><doi>10.1038/sj.bjp.0704828</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record>
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subjects 4-Aminopyridine - pharmacology
Angioplasty, Balloon, Coronary
Animals
Biological and medical sciences
Biological Factors - pharmacology
Biological Factors - physiology
Blood vessels and receptors
bradykinin
Bradykinin - pharmacology
Coronary Vessels - drug effects
Coronary Vessels - metabolism
Coronary Vessels - physiology
Cyclic GMP - biosynthesis
cyclic nucleotides
Dinoprost - pharmacology
Endothelium, Vascular - drug effects
Endothelium, Vascular - metabolism
Endothelium, Vascular - physiology
endothelium‐derived hyperpolarizing factor
Fundamental and applied biological sciences. Psychology
In Vitro Techniques
Isometric Contraction - drug effects
Membrane Potentials
Muscle Relaxation - drug effects
Muscle, Smooth, Vascular - drug effects
Muscle, Smooth, Vascular - metabolism
Muscle, Smooth, Vascular - physiology
nitric oxide
Nitric Oxide - biosynthesis
Nitric Oxide Donors - pharmacology
Nitroprusside - pharmacology
Potassium Channels - drug effects
Regenerated endothelium
Regeneration
Swine
Vasodilator Agents - pharmacology
Vertebrates: cardiovascular system
title Consequences of reduced production of NO on vascular reactivity of porcine coronary arteries after angioplasty: importance of EDHF
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