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DIVERSE PRE- AND POST-SYNAPTIC EXPRESSION OF M1-M4 MUSCARINIC RECEPTOR PROTEINS IN NEURONS AND AFFERENTS IN THE RAT NEOSTRIATUM

机译:大鼠神经纹状体神经元和相关细胞中M1-M4肌肉受体蛋白的突触前和突触后表达的差异

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摘要

We have utilized subtype specific antibodies to determine the cellular and subcellular distributions of the muscarinic acetylcholine receptor subtypes that are highly expressed in the rat striatum (m1-m4). Each receptor is expressed in distinct populations of striatal neurons in the relative proportions predicted by their mRNAs. They concentrate at post-synaptic sites and each of the four subtypes are also transported to pre-synaptic sites. m2 appears to be the only presynaptic autoreceptor in the striatum, but it is also localized in non-cholinergic terminals. These distinct pre- and post-synaptic localizations suggest that muscarinic receptor subtype diversity evolved to enable increasingly complex responses to acetylcholine release. [References: 28]
机译:我们已经利用亚型特异性抗体来确定在大鼠纹状体(m1-m4)中高度表达的毒蕈碱型乙酰胆碱受体亚型的细胞和亚细胞分布。每个受体均以其mRNA预测的相对比例在纹状体神经元的不同种群中表达。它们集中在突触后位点,并且四种亚型中的每一种也被转运到突触前位点。 m2似乎是纹状体中唯一的突触前自体受体,但它也位于非胆碱能终末。这些不同的突触前和突触后的本地化表明毒蕈碱受体亚型的多样性演变为能够对乙酰胆碱释放越来越复杂的反应。 [参考:28]

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