Sodium channel expression and localization at demyelinated sites in painful human dental pulp.

Sodium channel expression and localization at demyelinated sites in painful human dental pulp.
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DOI:
10.1016/j.jpain.2009.01.264
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发表时间:
2009-07
期刊:
The journal of pain
影响因子:
--
通讯作者:
Levinson SR
Levinson SR
中科院分区:
其他
文献类型:
--
作者:
Henry MA;Luo S;Foley BD;Rzasa RS;Johnson LR;Levinson SR

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炎症和神经损伤后钠通道(NaCh(s))的表达发生变化,这种变化与疼痛状态的产生有关。在这里,我们检查了正常和疼痛拔除的人类牙齿的神经纤维内的 NaCh 表达,特别强调它们在大量积累中的定位,就像朗飞结中看到的那样。使用泛特异性 NaCh 抗体和 caspr(用于可视化 Ranvier 结节的旁节蛋白)抗体对来自正常智齿和患有与严重自发性疼痛相关的大龋齿病变的牙齿的牙髓组织切片进行双染色,而其他切片则用 NaCh、caspr 和髓磷脂碱性蛋白 (MBP) 抗体进行三染色。使用共焦显微镜获得 Z 系列图像,并使用 NIH ImageJ 软件进行评估,以量化 NaCh 积累的密度和大小,并表征 caspr 识别的典型和非典型节点部位的 NaCh 定位。尽管结果显示疼痛样本中 NaCh 积累的总体密度和大小存在差异,但一个常见的发现包括非典型淋巴结部位 NaCh 的重塑。 NaCh 的这种重塑包括神经区域内显着的 NaCh 表达,这表明 MBP 染色选择性丧失,其模式与脱髓鞘过程一致。
The expression of sodium channels (NaCh(s)) change after inflammatory and nerve lesions and this change has been implicated in the generation of pain states. Here we examine NaCh expression within nerve fibers from normal and painful extracted human teeth with special emphasis on their localization within large accumulations, like those seen at nodes of Ranvier. Pulpal tissue sections from normal wisdom teeth and from teeth with large carious lesions associated with severe and spontaneous pain were double-stained with pan-specific NaCh antibody and caspr (paranodal protein used to visualize nodes of Ranvier) antibody, while additional sections were triple-stained with NaCh, caspr and myelin basic protein (MBP) antibodies. Z-series of images were obtained with the confocal microscope and evaluated with NIH ImageJ software to quantify the density and size of NaCh accumulations, and to characterize NaCh localization at caspr-identified typical and atypical nodal sites. Although the results showed variability in the overall density and size of NaCh accumulations in painful samples, a common finding included the remodeling of NaChs at atypical nodal sites. This remodeling of NaChs included prominent NaCh expression within nerve regions that showed a selective loss of MBP staining in a pattern consistent with a demyelinating process.
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影响因子: 2.9
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