Quantitative Estimation and Chemical Coding of Spiny Type I Neurons in Human Intestines

Quantitative Estimation and Chemical Coding of Spiny Type I Neurons in Human Intestines
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人类肠道多刺 I 型神经元的定量估计和化学编码

DOI:
10.1159/000320542
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发表时间:
2011
影响因子:
2.7
通讯作者:
Brehmer A
Brehmer A
中科院分区:
生物学4区
文献类型:
--
作者:
Schuy J;Schlabrakowski A;Neuhuber W;Brehmer A

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以往的研究表明,大多数人肌间神经元共染色血管活性肠肽(VIP),神经元型一氧化氮合酶(nNOS)和神经丝(NF)显示的形态多刺I型神经元显示下降的投影模式。在这里,我们估计了人类肠道中的棘状神经元的比例,VIP/nNOS免疫反应与棘状神经元的一致性的量,以及甘丙肽(GAL)是否与VIP共定位。对21名患者或身体供体(中位年龄65岁; 10名女性,11名男性)的三组秋水仙碱预处理和固定的整体标本进行VIP,nNOS和NF染色,VIP,nNOS和人神经元蛋白Hu C/D(HU)以及VIP,nNOS和GAL染色。大部分VIP/nNOS共反应神经元是棘状神经元(分别在小肠/大肠中为79/80%),并且大部分棘状神经元对VIP和nNOS共染色(82/69%)。VIP/nNOS/HU共免疫反应的神经元分别为7%和4%。GAL/VIP共免疫反应性分别在69%和27%的棘神经元中被证明。我们的结论是显示VIP和nNOS的共反应性的神经元的数量是小肠和大肠中的棘状神经元的定量指标,并且棘状神经元的比例在小肠中约为7%,在大肠中约为4%。由于NF/VIP/nNOS共染色的神经纤维主要存在于环形肌层,而不是周围的棘状神经元胞体,我们认为它们可能代表抑制性运动神经元,而不是下行的中间神经元。
Previous studies have shown that most human myenteric neurons co-staining for vasoactive intestinal peptide (VIP), neuronal nitric oxide synthase (nNOS) and neurofilaments (NF) display the morphology of spiny type I neurons displaying a descending projection pattern. Here, we estimated the proportions of spiny neurons in human intestines, the amount of congruence of VIP/nNOS-immunoreactive with spiny neurons and whether galanin (GAL) is co-localized with VIP. Three sets of colchicine-pretreated and fixed whole mounts of 21 patients or body donors (median age 65 years; 10 female, 11 male) were stained for VIP, nNOS and NF, for VIP, nNOS and the human neuronal protein Hu C/D (HU) as well as for VIP, nNOS and GAL. The majority of VIP/nNOS-co-reactive neurons were spiny neurons (79/80% in small/large intestine, respectively) and the majority of spiny neurons co-stained for VIP and nNOS (82/69%). Neurons co-immunoreactive for VIP/nNOS/HU amounted to 7 and 4%, respectively. GAL/VIP-co-immunoreactivity was demonstrated in 69 and 27% of spiny neurons, respectively. We conclude that the number of neurons displaying co-reactivity for VIP and nNOS is a quantitative indicator of spiny neurons in both small and large intestine and that the proportion of spiny neurons is about 7% in small and 4% in large intestines. Since nerve fibres co-staining for NF/VIP/nNOS were found mainly in the circular muscle layer but not the surrounding perikarya of spiny neurons, we suggest that they may represent inhibitory motor neurons rather than descending interneurons.
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