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• W2002021490 abstract "The effects of the compound RS 86 (2-ethyl-8-methyl-2,8-diazaspiro-[4,5]-deecan-1,3-dion hydrobromide) in a number of in vitro and in vivo test systems for muscarinic cholinergic activity were analyzed and compared to those of classical muscarinic receptor agonists. In radioligand binding assays RS 86 presented high nanomolar apparent affinity only for sites labeled by 3H-muscarinic receptor agonists while its apparent affinity for sites labeled by 3H-muscarinic receptor antagonists including [3H]QNB, [3H]NMS and [3H]pirenzepine was in the micromolar range. RS 86 had no or only low affinity (IC50 > 10 μM) for other neurotransmitter or drug receptor sites. The compound induced scopolamine-sensitive contractions of the isolated guinea-pig ileum showing a pD2 of 6 in this model. In the isolated rat superior cervical ganglion RS 86 was also an agonist with a pD2 of 6.7. When given to mice or rats by different routes RS 86 induced central and peripheral effects typical of a muscarinic receptor agonist, such as hypothermia, tremor, mydriasis, salivation, lacrimation, diarrhoea and modification of behavior as observed in an open field. In several of these tests RS 86 was about 10 times less potent than oxotremorine but more potent than arecoline, pilocarpine, aceclidine or the compound (cis) AF-30. The ED50 values for some central effects, including the induction of hypothermia and alert non-mobile behavior were lower than those for tremor and peripheral effects. Some of the effects lasted for up 6 h, depending on the dose. Finally, RS 86 administration resulted in modifications of brain acetylcholine turnover and high affinity choline uptake typical of a central muscarinic receptor agonist. Taken together these results demonstrate clearly that RS 86 is a potent, centrally acting, selective muscarinic receptor agonist. RS 86 appears to be an adequate tool for the clinical examination of the cholinergic hypothesis of Alzheimer's disease." @default.
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• W2002021490 date "1986-06-01" @default.
• W2002021490 modified "2023-09-28" @default.
• W2002021490 title "The pharmacological assessment of RS 86 (2-ethyl-8-methyl-2,8-diazaspiro-[4,5]-decan-1,3-dion hydrobromide). A potent, specific muscarinic acetylcholine receptor agonist" @default.
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• W2002021490 doi "https://doi.org/10.1016/0014-2999(86)90082-8" @default.
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