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Pro-neurotrophins, sortilin, and nociception

机译:神经营养素,sortilin和伤害感受

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摘要

Nerve growth factor (NGF) signaling is important in the development and functional maintenance of nociceptors, but it also plays a central role in initiating and sustaining heat and mechanical hyperalgesia following inflammation. NGF signaling in pain has traditionally been thought of as primarily engaging the classic high-affinity receptor tyrosine kinase receptor TrkA to initiate sensitization events. However, the discovery that secreted proforms of nerve NGF have biological functions distinct from the processed mature factors raised the possibility that these proneurotrophins (proNTs) may have distinct function in painful conditions. ProNTs engage a novel receptor system that is distinct from that of mature neurotrophins, consisting of sortilin, a type I membrane protein belonging to the VPS10p family, and its co-receptor, the classic low-affinity neurotrophin receptor p75NTR. Here, we review how this new receptor system may itself function with or independently of the classic TrkA system in regulating inflammatory or neuropathic pain.
机译:神经生长因子(NGF)信号在伤害感受器的发育和功能维持中很重要,但在炎症后引发和维持热和机械性痛觉过敏中也起着核心作用。传统上,疼痛中的NGF信号传导被认为主要参与经典的高亲和力受体酪氨酸激酶受体TrkA引发敏化事件。然而,神经NGF的分泌形式具有不同于已加工成熟因子的生物学功能的发现,增加了这些神经营养因子(proNTs)在疼痛条件下可能具有独特功能的可能性。 ProNT参与了一个不同于成熟神经营养蛋白的新型受体系统,该系统由sortilin(一种属于VPS10p家族的I型膜蛋白)及其共受体,经典的低亲和力神经营养蛋白受体p75NTR组成。在这里,我们回顾了这种新的受体系统本身如何在调节炎症性或神经性疼痛中与经典TrkA系统一起发挥作用或独立于传统TrkA系统起作用。

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