中国神经再生研究(英文版) ›› 2025, Vol. 20 ›› Issue (9): 2682-2696.doi: 10.4103/NRR.NRR-D-23-01539

• 原著:神经损伤修复保护与再生 • 上一篇    下一篇

精氨酸甲基转移酶6调控hnRNP F表达成为调控神经病理性疼痛的潜在干预靶点

  

  • 出版日期:2025-09-15 发布日期:2024-12-30

Protein arginine methyltransferase-6 regulates heterogeneous nuclear ribonucleoprotein-F expression and is a potential target for the treatment of neuropathic pain

Xiaoyu Zhang1, 2, 3, #, Yuqi Liu2, #, Fangxia Xu2, #, Chengcheng Zhou2 , Kaimei Lu2 , Bin Fang2 , Lijuan Wang2, *, Lina Huang2, *, Zifeng Xu1, 3, *   

  1. 1 Department of Anesthesiology, International Peace Maternity and Child Health Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China;  2 Department of Anesthesiology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China;  3 Shanghai Key Laboratory of Embryo Original Diseases, Shanghai, China
  • Online:2025-09-15 Published:2024-12-30
  • Contact: Zifeng Xu, MD, PhD, xuzf@shsmu.edu.cn; Lina Huang, MD, PhD, lina.huang@shgh.cn; Lijuan Wang, MD, PhD, novjul0815@163.com.
  • Supported by:
    This work was supported by the National Natural Science Foundation of China, Nos. 82001178 (to LW), 81901129 (to LH), 82001175 (to FX); Shanghai Sailing Program, No. 20YF1439200 (to LW); the Natural Science Foundation of Shanghai, China, No. 23ZR1450800 (to LH); and the Fundamental Research Funds for the Central Universities, No. YG2023LC15 (to ZX).

摘要:

精氨酸甲基转移酶6(PRMT6)功能包括参与RNA代谢、转录调节、细胞内信号转导、DNA修复等,对于真核基因表达调控发挥着重要的作用,但其在背根神经节内的表达以及在神经病理性疼痛中的作用仍未见报道。实验使用坐骨神经分支选择损伤模型研究了 PRMT6 在神经病理性疼痛中的表达和机制。免疫组化、Western 印迹、免疫沉淀和非标记蛋白质组学分析结果显示,PRMT6主要与背根神经节中的β-微管蛋白III共定位,并在坐骨神经分支选择损伤后减少,Prmt6-/-小鼠表现出痛觉过敏。此外,通过抑制PRMT6的减少,可减轻坐骨神经分支选择损伤引起的机械痛超敏反应。相反,背根神经节中 PRMT6 的下调会导致同侧背角中磷酸化的细胞外信号调节激酶水平升高,并在没有坐骨神经分支选择损伤的情况下增强对机械刺激的反应。此外,PRMT6调节hnRNP F的表达并不依赖于其精氨酸甲基化酶活性,而依赖于其319-388个氨基酸结构域。这些结果表明,PRMT6 是治疗周围神经病理性疼痛的潜在干预靶点。

https://orcid.org/0000-0003-4899-4991 (Zifeng Xu); https://orcid.org/0000-0002-4312-2628 (Lina Huang); 
https://orcid.org/0000-0002-5359-2084 (Lijuan Wang)

Abstract: Protein arginine methyltransferase-6 participates in a range of biological functions, particularly RNA processing, transcription, chromatin remodeling, and endosomal trafficking. However, it remains unclear whether protein arginine methyltransferase-6 modifies neuropathic pain and, if so, what the mechanisms of this effect. In this study, protein arginine methyltransferase-6 expression levels and its effect on neuropathic pain were investigated in the spared nerve injury model, chronic constriction injury model and bone cancer pain model, using immunohistochemistry, western blotting, immunoprecipitation, and label-free proteomic analysis. The results showed that protein arginine methyltransferase-6 mostly co-localized with β-tubulin III in the dorsal root ganglion, and that its expression decreased following spared nerve injury, chronic constriction injury and bone cancer pain. In addition, PRMT6 knockout (Prmt6–/–) mice exhibited pain hypersensitivity. Furthermore, the development of spared nerve injury-induced hypersensitivity to mechanical pain was attenuated by blocking the decrease in protein arginine methyltransferase-6 expression. Moreover, when protein arginine methyltransferase-6 expression was downregulated in the dorsal root ganglion in mice without spared nerve injury, increased levels of phosphorylated extracellular signal-regulated kinases were observed in the ipsilateral dorsal horn, and the response to mechanical stimuli was enhanced. Mechanistically, protein arginine methyltransferase-6 appeared to contribute to spared nerve injury-induced neuropathic pain by regulating the expression of heterogeneous nuclear ribonucleoprotein-F. Additionally, protein arginine methyltransferase-6-mediated modulation of heterogeneous nuclear ribonucleoprotein-F expression required amino acids 319 to 388, but not classical H3R2 methylation. These findings indicated that protein arginine methyltransferase-6 is a potential therapeutic target for the treatment of peripheral neuropathic pain.

Key words: dorsal root ganglion,  heterogeneous nuclear ribonucleoprotein F,  neuropathic pain,  protein arginine methyltransferase-6,  sensory neurons