Barron B A, Hexum T D
Br J Pharmacol. 1986 Dec;89(4):713-8. doi: 10.1111/j.1476-5381.1986.tb11175.x.
Muscarinic receptor modulation of secretion from the adrenal medulla was studied using retrogradely perfused bovine tissue. Atropine, at a dose not affecting 1,1 dimethyl-4-phenylpiperizinium (DMPP)-stimulated release, inhibited the acetylcholine (ACh)-stimulated release of noradrenaline and [Met5]enkephalin-immunoreactive material (ME-IRM). DMPP-stimulated release of catecholamines and ME-IRM was potentiated by the addition of methacholine. Pilocarpine significantly potentiated the release of noradrenaline only. Methacholine, pilocarpine or muscarine, when infused alone, had no stimulatory affect on the basal release of ME-IRM. These findings suggest that the muscarinic receptors in the bovine adrenal medulla function by potentiating the release of ME-IRM and catecholamines induced by nicotinic receptor stimulation.
利用逆行灌注的牛组织研究了毒蕈碱受体对肾上腺髓质分泌的调节作用。阿托品在不影响1,1 - 二甲基 - 4 - 苯基哌嗪鎓(DMPP)刺激释放的剂量下,抑制了乙酰胆碱(ACh)刺激的去甲肾上腺素和[Met5]脑啡肽免疫反应性物质(ME - IRM)的释放。加入乙酰甲胆碱可增强DMPP刺激的儿茶酚胺和ME - IRM的释放。毛果芸香碱仅显著增强了去甲肾上腺素的释放。当单独注入乙酰甲胆碱、毛果芸香碱或毒蕈碱时,对ME - IRM的基础释放没有刺激作用。这些发现表明,牛肾上腺髓质中的毒蕈碱受体通过增强烟碱受体刺激诱导的ME - IRM和儿茶酚胺的释放来发挥作用。