Major histocompatibility complex class I-mediated inhibition of neurite outgrowth from peripheral nerves.

Major histocompatibility complex class I-mediated inhibition of neurite outgrowth from peripheral nerves.
复制标题

主要的组织相容性复合物I类介导的外周神经对神经突生长的抑制作用。

DOI:
10.1016/j.imlet.2010.10.011
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发表时间:
2011-03-30
期刊:
影响因子:
4.4
通讯作者:
Kaufman DL
Kaufman DL
中科院分区:
医学3区
文献类型:
--
作者:
Wu ZP;Bilousova T;Escande-Beillard N;Dang H;Hsieh T;Tian J;Kaufman DL

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对缺乏经典主要组织相容性复合物 I 类 (MHCI) 的小鼠的研究表明,MHCI 在中枢神经系统的神经发育中发挥着重要作用。我们之前研究了重组MHCI分子对野生型视网膜外植体的影响,观察到MHCI可以抑制视网膜神经突的生长,其中自体MHCI分子比非自体MHCI分子具有更大的抑制作用。在这里,我们研究了经典 MHCI 对周围神经系统 (PNS) 神经元轴突生长的影响。我们使用胚胎背根神经节 (DRG) 外植体模型,因为它们的神经元表达 MHCI,并且 DRG 外植体已广泛用于评估分子对 PNS 神经元轴突生长的影响。我们观察到皮摩尔水平的重组自体 MHCI 分子(而非非自体 MHCI 分子)抑制 DRG 外植体的轴突生长。这种对自身与非自身 MHCI 的不同敏感性表明,在发育早期,自身 MHCI 可能“教育”PNS 神经元表达适当的 MHCI 受体,就像自然杀伤细胞发育过程中发生的那样。此外,我们观察到 MHCI 四聚体对胚胎 DRG 神经元进行了染色,表明经典 MHCI 受体的表达。这些结果表明 MHCI 和 MHCI 受体在 PNS 发育的早期阶段发挥作用,并可能为促进 PNS 损伤后神经元生长的治疗策略提供新的靶点。
Studies of mice deficient in classical major histocompatability complex class I (MHCI) revealed that MHCI plays an important role in neurodevelopment in the central nervous system. We previously studied the effects of recombinant MHCI molecules on wildtype retina explants and observed that MHCI can inhibit retina neurite outgrowth, with self-MHCI molecules having greater inhibitory effect than non-self MHCI molecules. Here, we examined classical MHCI’s effects on axon outgrowth from neurons of the peripheral nervous system (PNS). We used the embryonic dorsal root ganglia (DRG) explant model since their neurons express MHCI and because DRG explants have been widely used to assess the effects of molecules on axonal outgrowth from PNS neurons. We observed that picomolar levels of a recombinant self-MHCI molecule, but not non-self MHCI molecules, inhibited axon outgrowth from DRG explants. This differential sensitivity to self- versus non-self MHCI suggests that early in development, self-MHCI may “educate” PNS neurons to express appropriate MHCI receptors, as occurs during natural killer cell development. Furthermore, we observed that a MHCI tetramer stained embryonic DRG neurons, indicating the expression of classical MHCI receptors. These results suggest that MHCI and MHCI receptors play roles during early stages of PNS development and may provide new targets of therapeutic strategies to promote neuronal outgrowth after PNS injury.
DOI: 10.4049/jimmunol.0902159
发表时间: 2010-01-15
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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Escande-Beillard N;Washburn L;Zekzer D;Wu ZP;Eitan S;Ivkovic S;Lu Y;Dang H;Middleton B;Bilousova TV;Yoshimura Y;Evans CJ;Joyce S;Tian J;Kaufman DL
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