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- W2155294069 abstract "The pharmacological properties of the 5-hydroxytryptamine (HT)(1A) receptor agonist (R)-3,4-dihydro-N-isopropyl-3-(N-isopropyl-N-propylamino)-2H-1-benzopyran-5-carboxamide (NAE-086) were examined with in vitro and in vivo techniques. Receptor binding studies demonstrated that NAE-086 was a high-affinity and selective 5-HT(1A) receptor ligand with a K(i) value of 4.5 nM in membranes from rat hippocampus. Of 32 other receptors examined NAE-086 had a modest affinity only for the 5-HT(7) receptor (K(i) = 240 nM). NAE-086 inhibited VIP-stimulated adenylyl cyclase activity in GH(4)ZD10 cells with 79% of the efficacy of 5-HT. This inhibition was blocked by the 5-HT(1A) receptor (and beta-adrenoceptor) antagonist (-)alprenolol. A minor metabolite of NAE-086 in rats, (R)-3,4-dihydro-3-(N-isopropyl-N-propylamino)-2H-1-benzopyran-5-carboxamide had a similar receptor profile but had 17 times higher affinity for the 5-HT(1A) receptor (K(i) = 0.26 nM). In vivo, NAE-086 induced all the typical effects of a 5-HT(1A) receptor agonist in rats: it decreased 5-HT synthesis (5-HTP accumulation) and 5-HT turnover (measured as the ratio of 5-hydroxyindoleacetic acid/5-HT), increased corticosterone secretion, induced the 5-HT(1A) syndrome (flat body posture and forepaw treading), inhibited the cage-leaving response, and caused hypothermia. All the responses mediated by postsynaptic 5-HT(1A) receptors were attenuated after single or repeated treatment of the rats with NAE-086. Simultaneously with the development of the tolerance to 5-HT(1A) receptor-mediated responses, 5-HT(2A) receptor-mediated responses were enhanced, as judged from the increased number of spontaneous and/or agonist [1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane]-induced wet-dog shake responses. The significance of this behavioral effect in relation to clinical observations is discussed." @default.
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- W2155294069 title "The pharmacological profile of (R)-3,4-dihydro-N-isopropyl-3-(N-isopropyl-N-propylamino)-2H-1-benzopyran-5-carboxamide, a selective 5-hydroxytryptamine(1A) receptor agonist." @default.
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