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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >NEUROSECRETORY VESICLES CAN BE HYBRIDS OF SYNAPTIC VESICLES AND SECRETORY GRANULES
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NEUROSECRETORY VESICLES CAN BE HYBRIDS OF SYNAPTIC VESICLES AND SECRETORY GRANULES

机译:神经保护性血管可以是突触性血管和安全性颗粒的混合体

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摘要

We have investigated the relationship of the so-called small dense core vesicle (SDCV), the major catecholamine-containing neurosecretory vesicle of sympathetic neurons, to synaptic vesicles containing classic neurotransmitters and secretory granules containing neuropeptides. SDCVs contain membrane proteins characteristic of synaptic vesicles such as synaptophysin and synaptoporin. However, SDCVs also contain membrane proteins characteristic of certain secretory granules like the vesicular monoamine transporter and the membrane-bound form of dopamine beta-hydroxylase. In neurites of sympathetic neurons, synaptophysin and dopamine beta-hydroxylase are found in distinct vesicles, consistent with their transport from the trans-Golgi network to the site of SDCV formation in constitutive secretory vesicles and secretory granules, respectively. Hence, SDCVs constitute a distinct type of neurosecretory vesicle that is a hybrid of the synaptic vesicle and the secretory granule membranes and that originates from the contribution of both the constitutive and the regulated pathway of protein secretion. [References: 33]
机译:我们已经研究了所谓的小致密核心囊泡(SDCV),交感神经元的主要含有儿茶酚胺的神经分泌囊泡与含有经典神经递质的突触囊泡和含有神经肽的分泌颗粒之间的关系。 SDCV包含突触小泡的特征性膜蛋白,例如突触素和突触蛋白。但是,SDCV还包含某些分泌性颗粒(如水泡单胺转运蛋白和多巴胺β-羟化酶的膜结合形式)特征的膜蛋白。在交感神经元的神经突中,突触泡蛋白和多巴胺β-羟化酶存在于不同的囊泡中,这与它们从反式高尔基网络到组成性分泌囊泡和分泌颗粒中SDCV形成部位的转运相一致。因此,SDCVs构成了神经分泌囊泡的一种独特类型,它是突触囊泡和分泌性颗粒膜的混合体,起源于蛋白分泌的组成性途径和调节性途径。 [参考:33]

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