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PREJUNCTIONAL MUSCARINIC RECEPTORS REGULATING NEUROTRANSMITTER RELEASE IN AIRWAYS

机译:调节航空神经发射器释放的功能性肌肉接收器

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Prejunctional pA(2) values of five muscarinic antagonists were determined in the guinea-pig trachea under stimulation conditions in which the antagonists alone did not enhance acetylcholine release. The antagonists were partly selective at M(1) (pirenzepine), M(2) (AQ-RA 741, himbacine) and M(3) receptors (hexahydrosiladifenidol, dicyclomine). The profile of the antagonist affinities was different from that obtained at cardiac M(2) receptors but resembled the profile reported in the literature for the cloned m4 receptor. This suggests that autoinhibition of acetylcholine release in the trachea is mediated via M(4) receptors. [References: 25]
机译:在豚鼠气管中,在单独的拮抗剂不能增强乙酰胆碱释放的刺激条件下,测定五个毒蕈碱拮抗剂的连接前pA(2)值。拮抗剂在M(1)(哌仑西平),M(2)(AQ-RA 741,喜巴因)和M(3)受体(六氢硅二苯二酚,双环胺)上具有部分选择性。拮抗剂亲和力的概况不同于在心脏M(2)受体获得的概况,但类似于文献中针对克隆的m4受体报道的概况。这表明气管中乙酰胆碱释放的自动抑制是通过M(4)受体介导的。 [参考:25]

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