Immune activation of the p75 neurotrophin receptor: implications in neuroinflammation.

Immune activation of the p75 neurotrophin receptor: implications in neuroinflammation.
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P75神经营养素受体的免疫激活:在神经炎症中的意义。

DOI:
10.3389/fnmol.2023.1305574
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发表时间:
2023
影响因子:
4.8
通讯作者:
Hempstead, Barbara L.
Hempstead, Barbara L.
中科院分区:
医学2区
文献类型:
--
作者:
Danelon, Victor;Garret-Thomson, Sarah C.;Almo, Steven C.;Lee, Francis S.;Hempstead, Barbara L.

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尽管与其他肿瘤坏死因子受体超家族 (TNFRSF) 成员结构相似,但 p75 神经营养素受体(p75NTR、TNFR16)介导与其他 TNFR 不共享的多效性生物学功能。 p75NTR 在神经系统而不是免疫细胞中的高水平表达、其对共受体的利用以及其与可溶性二聚体而不是可溶性或细胞束缚的三聚体配体的相互作用都是其与大多数其他 TNFR 的区别的特征。在这里,我们将这些属性与 TNFR 超家族的其他成员进行比较。此外,我们描述了免疫球蛋白 (Ig) 超家族成员 B7-1 (CD80) 最近的进化适应,它允许与神经元表达的 p75NTR 结合。 B7-1 介导的与 p75NTR 的结合发生在人类和其他灵长类动物中,但由于最近在灵长类动物 B7-1 中进化的特定序列变化而不会发生在低等哺乳动物中。这一发现强调了 p75NTR 可以对炎症信号做出反应并通过 B7-1 的参与触发大脑中突触消除的额外机制,而 B7-1 被认为是免疫限制性的。这些观察结果表明,通过对免疫调节信号作出反应,p75NTR 确实与其他免疫共调节 TNFR 家族成员具有共同点。灵长类动物 B7-1 结合并引发 p75NTR 介导的对神经元形态和功能影响的进化,与损伤或炎症期间突触作用的免疫驱动调节的关系进行了讨论。
Despite structural similarity with other tumor necrosis factor receptor superfamily (TNFRSF) members, the p75 neurotrophin receptor (p75NTR, TNFR16) mediates pleiotropic biological functions not shared with other TNFRs. The high level of p75NTR expression in the nervous system instead of immune cells, its utilization of co-receptors, and its interaction with soluble dimeric, rather than soluble or cell-tethered trimeric ligands are all characteristics which distinguish it from most other TNFRs. Here, we compare these attributes to other members of the TNFR superfamily. In addition, we describe the recent evolutionary adaptation in B7-1 (CD80), an immunoglobulin (Ig) superfamily member, which allows engagement to neuronally-expressed p75NTR. B7-1-mediated binding to p75NTR occurs in humans and other primates, but not lower mammals due to specific sequence changes that evolved recently in primate B7-1. This discovery highlights an additional mechanism by which p75NTR can respond to inflammatory cues and trigger synaptic elimination in the brain through engagement of B7-1, which was considered to be immune-restricted. These observations suggest p75NTR does share commonality with other immune co-modulatory TNFR family members, by responding to immunoregulatory cues. The evolution of primate B7-1 to bind and elicit p75NTR-mediated effects on neuronal morphology and function are discussed in relationship to immune-driven modulation of synaptic actions during injury or inflammation.
多发性硬化病变中共刺激分子B7-1(CD80),B7-2(CD86)和白介素12细胞因子的表达。
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