Inhibitions and Down-Regulation of Motor Protein Eg5 Expression in Primary Sensory Neurons Reveal a Novel Therapeutic Target for Pathological Pain.

Inhibitions and Down-Regulation of Motor Protein Eg5 Expression in Primary Sensory Neurons Reveal a Novel Therapeutic Target for Pathological Pain.
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初级感觉神经元运动蛋白 Eg5 表达的抑制和下调揭示了病理性疼痛的新治疗靶点

DOI:
10.1007/s13311-022-01263-2
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发表时间:
2022-07
期刊:
影响因子:
5.7
通讯作者:
Yu, Yao-Qing
Yu, Yao-Qing
中科院分区:
医学2区
文献类型:
--
作者:
Wei, Na;Yu, Yang;Yang, Yan;Wang, Xiao-Liang;Zhong, Zhen-Juan;Chen, Xue-Feng;Yu, Yao-Qing

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运动蛋白Eg5,被称为kif11或kinesin-5,与有丝分裂纺锤体中相邻的微管相互作用,在细胞分裂中起重要作用,但Eg5在成熟的有丝分裂后神经元中的功能仍不清楚。在本研究中,我们探讨了Eg5在病理性疼痛中的作用及其分子机制。药物抑制Eg5和特定shrna表达病毒载体逆转完全弗氏佐剂(CFA)诱导的疼痛,并消除背根神经节(DRG)神经元中香草样蛋白受体亚型1 (VR1)的表达。在背根,Eg5抑制促进VR1轴突转运,降低VR1表达。在脊髓中,Eg5抑制抑制了轴突末端VR1的表达,并破坏了I/II浅层的突触形成。最后,我们发现Eg5在PI3K/Akt信号介导的VR1膜运输和病理性疼痛中是必需的。目前的研究提供了令人信服的证据,证明Eg5在初级感觉神经元中具有非规范功能。这些结果表明Eg5可能是治疗顽固性疼痛的潜在靶点。在线版本包含补充材料,下载地址为10.1007/s13311-022-01263-2。
The motor protein Eg5, known as kif11 or kinesin-5, interacts with adjacent microtubules in the mitotic spindle and plays essential roles in cell division, yet the function of Eg5 in mature postmitotic neurons remains largely unknown. In this study, we investigated the contribution and molecular mechanism of Eg5 in pathological pain. Pharmacological inhibition of Eg5 and a specific shRNA-expressing viral vector reversed complete Freund’s adjuvant (CFA)-induced pain and abrogated vanilloid receptor subtype 1 (VR1) expression in dorsal root ganglion (DRG) neurons. In the dorsal root, Eg5 inhibition promoted VR1 axonal transport and decreased VR1 expression. In the spinal cord, Eg5 inhibition suppressed VR1 expression in axon terminals and impaired synapse formation in superficial laminae I/II. Finally, we showed that Eg5 is necessary for PI3K/Akt signalling-mediated VR1 membrane trafficking and pathological pain. The present study provides compelling evidence of a noncanonical function of Eg5 in primary sensory neurons. These results suggest that Eg5 may be a potential therapeutic target for intractable pain. The online version contains supplementary material available at 10.1007/s13311-022-01263-2.
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