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- W2090429211 abstract "5-hydroxytryptamine (5-HT) contracts vascular smooth muscle and pharmacological and molecular biological data suggest that these effects are mediated primarily by stimulation of 5-HT(1B) and 5-HT(2A) receptor subtypes. We have studied the properties of 7-fluoro-2-oxo-4-[2-[4-(thieno[3,2-c] pyridin-4-yl) piperazin-1-yl] ethyl]-1,2-dihydroquinoline-1-acetamide (SL 65.0472 ), a novel 5-HT receptor antagonist, in isolated vascular preparations contracted by 5-HT or sumatriptan. In canine isolated saphenous vein strips (putatively 5-HT(1B)-mediated contraction), SL 65.0472 antagonised sumatriptan-induced contractions in a competitive manner (pA(2) 8. 17+/-0.36). 5-HT contracts rabbit aorta by stimulation of 5-HT(2A) receptors. SL 65.0472 displaced the 5-HT concentration response curve in rabbit aorta rightwards with a significant reduction in maximum. The apparent pK(B) value was 8.58+/-0.18. 5-HT-induced contractions of human coronary arteries are mediated by a mixed population of 5-HT(1B) and 5-HT(2A) receptors. SL 65.0472 produced rightward parallel shifts of the 5-HT concentration response curves in all tissues studied (pA(2) 8.8+/-0.14, n=7). In conclusion, SL 65. 0472 is a potent antagonist of vascular smooth muscle contraction in vitro mediated by 5-HT receptor stimulation." @default.
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- W2090429211 date "2000-09-01" @default.
- W2090429211 modified "2023-09-27" @default.
- W2090429211 title "Effects of SL 65.0472, a novel 5-HT receptor antagonist, on 5-HT receptor mediated vascular contraction" @default.
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- W2090429211 doi "https://doi.org/10.1016/s0014-2999(00)00630-0" @default.
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