Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0014-2999(00)00629-4
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dc.titleAcetylcholinesterase-independent action of diisopropyl-flurophosphate in the rat aorta
dc.contributor.authorLim, S.L.
dc.contributor.authorSim, M.K.
dc.contributor.authorLoke, W.K.
dc.date.accessioned2012-04-02T07:43:09Z
dc.date.available2012-04-02T07:43:09Z
dc.date.issued2000
dc.identifier.citationLim, S.L., Sim, M.K., Loke, W.K. (2000). Acetylcholinesterase-independent action of diisopropyl-flurophosphate in the rat aorta. European Journal of Pharmacology 404 (3) : 353-359. ScholarBank@NUS Repository. https://doi.org/10.1016/S0014-2999(00)00629-4
dc.identifier.issn00142999
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/32163
dc.description.abstractRecent studies have shown that many organophosphates can bind competitively and noncompetitively to membrane muscarinic receptors. The present study investigated the responses of the rat aortic rings to diisopropyl-flurophosphate (DFP), an organophsophorus cholinesterase inhibitor, and the possible involvement of muscarinic receptors. DFP caused a concentration-dependent contraction when added cumulatively from 10-8 to 10-4 M. This contraction was inhibited in a noncompetitive manner by high concentrations of atropine (1.5 x 10-6 and 1.8 x 10-6 M) but was unaffected by similar concentrations of selective muscarinic receptor subtype antagonists, pirenzepine, 11-2[2-[(diethylamino)methyl]-1-piperidinyl]acetyl-5,11-dihydro-6 H-rido[2,3-b][1,4]benzodiazepin-6-one (AF-DX116) and 4-Diphenylacetoxy-N-methyl piperidine methiodide (4-DAMP). Phentolamine, an α-adrenoceptor antagonist, was able to inhibit the DFP-induced contraction in a noncompetitive manner at a concentration of 10-7 M. These findings suggested that the DFP-induced contraction in the rat aortic rings was mediated by norepinephrine that was released from sympathetic nerve terminals present in the aortic rings. (C) 2000 Elsevier Science B.V.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/S0014-2999(00)00629-4
dc.sourceScopus
dc.subject(Rat)
dc.subjectAorta
dc.subjectDiisopropyl-flurophosphate
dc.subjectNorepinephrine
dc.subjectOrganophosphate
dc.subjectPhentolami ne
dc.typeArticle
dc.contributor.departmentPHARMACOLOGY
dc.description.doi10.1016/S0014-2999(00)00629-4
dc.description.sourcetitleEuropean Journal of Pharmacology
dc.description.volume404
dc.description.issue3
dc.description.page353-359
dc.description.codenEJPHA
dc.identifier.isiut000089551500011
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