Source:http://linkedlifedata.com/resource/pubmed/id/14637194
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rdf:type | |
lifeskim:mentions |
umls-concept:C0021467,
umls-concept:C0021469,
umls-concept:C0023688,
umls-concept:C0028128,
umls-concept:C0030685,
umls-concept:C0035820,
umls-concept:C0038734,
umls-concept:C0221464,
umls-concept:C0391871,
umls-concept:C0680255,
umls-concept:C1140999,
umls-concept:C1283071,
umls-concept:C1298908,
umls-concept:C1511545,
umls-concept:C1521828,
umls-concept:C1522492,
umls-concept:C1698986,
umls-concept:C1704241,
umls-concept:C1963578
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pubmed:issue |
12
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pubmed:dateCreated |
2003-11-25
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pubmed:abstractText |
The inhibition of arterial tone produced by two nitric oxide (NO) derivatives of biological relevance, dinitrosyl-iron complexes with cysteine (DNIC-CYS) or with glutathione (DNIC-GSH), was compared. Both compounds induced vasorelaxation within the same concentration range (3-300 nM) in endothelium-denuded rat aortic rings. Consistent with a faster rate of NO release from DNIC-CYS than from DNIC-GSH, the relaxant effect of DNIC-CYS was rapid in onset and tended to recover with time, whereas the one of DNIC-GSH developed slowly and was sustained. In addition, DNIC-GSH (0.3 and 1 microM) but not DNIC-CYS (1 microM) induced, even after washout of the drug, a persistent hyporesponsiveness to vasoconstrictors and a relaxant effect of low molecular weight thiols like N-acetylcysteine (NAC, which can displace NO from preformed NO stores). Both effects of DNIC-GSH were associated with elevation of cyclic GMP content and were attenuated by NO scavengers or a cyclic GMP-dependent protein kinases inhibitor. In rings previously exposed to DNIC-GSH, addition of mercuric chloride (which can cleave the cysteine-NO bond of S-nitrosothiols) elicited relaxation, completely blunted the one of NAC and also abolished the persistent elevation of NO content. In conclusion, this study shows that whereas both DNIC-CYS and DNIC-GSH elicited a NO release-associated relaxant effect in isolated arteries, only DNIC-GSH induced an inhibition of contraction which persisted after drug removal. The persistent effect of DNIC-GSH was attributed to the formation of releasable NO stores in arterial tissue, most probably as S-nitrosothiols. Thus, the nature of the thiol ligand plays a critical role in determining the mechanisms and duration of the effect of LMW-DNIC in arteries.
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pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Acetylcysteine,
http://linkedlifedata.com/resource/pubmed/chemical/Cyclic GMP,
http://linkedlifedata.com/resource/pubmed/chemical/Glutathione,
http://linkedlifedata.com/resource/pubmed/chemical/Iron,
http://linkedlifedata.com/resource/pubmed/chemical/Mercuric Chloride,
http://linkedlifedata.com/resource/pubmed/chemical/Nitric Oxide,
http://linkedlifedata.com/resource/pubmed/chemical/Nitrogen Oxides,
http://linkedlifedata.com/resource/pubmed/chemical/S-Nitrosothiols,
http://linkedlifedata.com/resource/pubmed/chemical/Sulfhydryl Compounds,
http://linkedlifedata.com/resource/pubmed/chemical/dinitrosyl iron complex
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pubmed:status |
MEDLINE
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pubmed:month |
Dec
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pubmed:issn |
0006-2952
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
66
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
2365-74
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pubmed:dateRevised |
2006-11-15
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pubmed:meshHeading |
pubmed-meshheading:14637194-Acetylcysteine,
pubmed-meshheading:14637194-Animals,
pubmed-meshheading:14637194-Arteries,
pubmed-meshheading:14637194-Cyclic GMP,
pubmed-meshheading:14637194-Glutathione,
pubmed-meshheading:14637194-Iron,
pubmed-meshheading:14637194-Male,
pubmed-meshheading:14637194-Mercuric Chloride,
pubmed-meshheading:14637194-Molecular Weight,
pubmed-meshheading:14637194-Nitric Oxide,
pubmed-meshheading:14637194-Nitrogen Oxides,
pubmed-meshheading:14637194-Nitrosation,
pubmed-meshheading:14637194-Rats,
pubmed-meshheading:14637194-Rats, Wistar,
pubmed-meshheading:14637194-S-Nitrosothiols,
pubmed-meshheading:14637194-Sulfhydryl Compounds,
pubmed-meshheading:14637194-Vasoconstriction,
pubmed-meshheading:14637194-Vasodilation
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pubmed:year |
2003
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pubmed:articleTitle |
Inhibition of arterial contraction by dinitrosyl-iron complexes: critical role of the thiol ligand in determining rate of nitric oxide (NO) release and formation of releasable NO stores by S-nitrosation.
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pubmed:affiliation |
Faculté de Pharmacie, Pharmacologie and Physico-Chimie, UMR CNRS 7034, Université Louis Pasteur, 67401 Illkirch, France.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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