中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (29): 4680-4686.doi: 10.12307/2022.839

• 神经组织构建 nerve tissue construction • 上一篇    下一篇

MiR-204-5p减轻大鼠坐骨神经慢性缩窄损伤引起神经病理性疼痛的作用机制

毛  轲1,高誉华1,周松林1,赵彦芬1,张原源1,杜思龙1,李喜龙2   

  1. 1河南省中医院(河南中医药大学第二附属医院)麻醉科,河南省郑州市  450002;2河南省肿瘤医院(郑州大学附属肿瘤医院)麻醉与围术期医学科,河南省郑州市  450002
  • 收稿日期:2021-08-05 接受日期:2021-11-11 出版日期:2022-10-18 发布日期:2022-03-27
  • 通讯作者: 毛轲,主治医师,河南省中医院(河南中医药大学第二附属医院)麻醉科,河南省郑州市 450002
  • 作者简介:毛轲,男,1987年生,河南省原阳县人,汉族,2011年新乡医学院毕业,主治医师,主要从事麻醉与疼痛研究。
  • 基金资助:
    河南省医学科技攻关计划项目(LHGJ20200184),项目负责人:李喜龙

MiR-204-5p alleviates neuropathic pain in rats with chronic constriction injury

Mao Ke1, Gao Yuhua1, Zhou Songlin1, Zhao Yanfen1, Zhang Yuanyuan1, Du Silong1, Li Xilong2    

  1. 1Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine (the Second Affiliated Hospital of Henan University of Chinses Medicine), Zhengzhou 450002, Henan Province, China; 2Department of Anesthesiology and Perioperative Medicine, Henan Provincial Tumor Hospital (Affiliated Cancer Hospital of Zhengzhou University), Zhengzhou 450002, Henan Province, China
  • Received:2021-08-05 Accepted:2021-11-11 Online:2022-10-18 Published:2022-03-27
  • Contact: Mao Ke, Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine (the Second Affiliated Hospital of Henan University of Chinses Medicine), Zhengzhou 450002, Henan Province, China
  • About author:Mao Ke, Attending physician, Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine (the Second Affiliated Hospital of Henan University of Chinses Medicine), Zhengzhou 450002, Henan Province, China
  • Supported by:
    Henan Provincial Medical Science and Technology Research Project, No. LHGJ20200184 (to LXL)

摘要:

文题释义:
miRNA:是一类由内源基因编码的长度约为22个核苷酸的非编码单链RNA分子,它们在动植物中参与转录后基因表达调控。一个miRNA可以有多个靶基因,而几个miRNA也可以调节同一个基因。众多研究表明,miRNAs作为神经系统中基因表达和神经网络构建的关键调节器,在神经病理性疼痛的产生和调节中起着重要的作用。
神经病理性疼痛:国际疼痛研究协会将神经病理性疼痛定义为由神经系统原发性损害和功能障碍所激发或引起的疼痛。它属于一种慢性疼痛,疼痛表现为自发性疼痛、痛觉过敏、异常疼痛和感觉异常等临床特征。神经病理性疼痛可由多种因素诱发,如药物毒性、手术和创伤等。虽然研究人员对神经病理性疼痛的预后和治疗进行了大量研究与报道,但对神经病理性疼痛的作用机制仍不够清楚。

背景:miR-204-5p是神经病理性疼痛的潜在生物标志物,但其在神经病理性疼痛中的作用及作用机制尚未阐明。
目的:探讨miR-204-5p对大鼠坐骨神经慢性缩窄性损伤引起的神经病理性疼痛的作用及其分子机制。
方法:①将90只雄性SD大鼠随机分为假手术组、模型组、空载体组、miR-204-5p过表达组、杂乱干扰组和AURKB干扰组,每组15只。采用坐骨神经慢性缩窄性损伤方法建立大鼠神经性疼痛动物模型,建模后分别注射以下重组慢病毒(空载体、miR-204-5p过表达载体、杂乱干扰载体、AURKB短发夹RNA),注射量为1 μg。术前及术后第7,14天,采用RT-qPCR检测大鼠背根神经节中miR-204-5p和AURKB mRNA的表达水平;术前及术后第3,7,14,21天,通过缩足反应阈值和缩足潜伏期评估机械异位痛和热痛觉过敏;术后第7天,采用酶联免疫吸附法分析大鼠背根神经节中炎性细胞因子水平。②采用100 nmol/L脂多糖诱导大鼠小胶质细胞HAPI产生炎症反应,细胞分为对照组、脂多糖组、脂多糖+NC mimic组、脂多糖+miR-204-5p mimic组、脂多糖+miR-204-5p mimic+空载体组、脂多糖+miR-204-5p mimic+AURKB过表达组。采用酶联免疫吸附法分析大鼠小胶质细胞HAPI中炎性细胞因子水平;Western blot法检测大鼠小胶质细胞HAPI中AURKB及Wnt/β-catenin通路标志蛋白的表达水平;双荧光素酶报告基因法验证miR-204-5p与AURKB的靶定关系。
结果与结论:①与假手术组比较,坐骨神经慢性缩窄性损伤大鼠背根神经节中miR-204-5p表达显著降低;②与模型组比较,过表达miR-204-5p可显著提高缩足反应阈值和缩足潜伏期;③在坐骨神经慢性缩窄性损伤大鼠和脂多糖激活的HAPI细胞中,过表达miR-204-5p可以抑制炎性细胞因子的分泌;④双荧光素酶报告基因证实了AURKB是miR-204-5p的下游靶基因;⑤在坐骨神经慢性缩窄性损伤大鼠背根神经节中,AURKB mRNA表达显著升高,沉默AURKB可抑制神经病理性疼痛和神经炎症;⑥在脂多糖激活的HAPI细胞中,miR-204-5p过表达通过抑制AURKB表达降低Wnt/β-catenin信号通路蛋白表达水平,减轻神经炎症反应;⑦以上研究结果表明,miR-204-5p通过AURKB/Wnt/β-catenin通路缓解坐骨神经慢性缩窄性损伤大鼠神经病理性疼痛。

https://orcid.org/0000-0003-0979-900X (毛轲)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: miR-204-5p, 神经性疼痛, AURKB, 坐骨神经慢性缩窄性损伤, 大鼠, Wnt通路

Abstract: BACKGROUND: MiR-204-5p is a potential biomarker of neuropathic pain, but its role and mechanism in neuropathic pain have not been clarified.
OBJECTIVE: To investigate the effect and molecular mechanism of miR-204-5p on neuropathic pain caused by chronic constriction injury in rats. 
METHODS: (1) A total of 90 male Sprague-Dawley rats were randomized into sham group, model group, empty vector group, miR-204-5p overexpression group, scramble group, and aurora kinase B (AURKB) interference group, with 15 rats in each group. The rat neuropathic pain model was established based on chronic constriction injury of the sciatic nerve. After modeling, rats in each group were injected with the following recombinant lentiviruses (empty vector, miR-204-5p 
overexpression vector, scrambled shRNA, AURKB shRNA), and the injection volume was 1 μg. The expression levels of miR-204-5p and AURKB mRNAs in the dorsal root ganglia of rats were measured by RT-qPCR before surgery and on the 7th and 14th days after surgery. Mechanical allodynia and thermal hyperalgesia were assessed by paw withdrawal threshold and paw withdrawal latency before surgery and on the 3rd, 7th, 14th, and 21st days after surgery. The levels of inflammatory cytokines in dorsal root ganglion tissues of rats were determined by ELISA on the 7th day after surgery. (2) 100 nmol/L lipopolysaccharide was used to induce inflammation in rat microglia cell line (HAPI). The cells were divided into control group, lipopolysaccharide group, lipopolysaccharide+NC mimic group, lipopolysaccharide+miR-204-5p mimic group, lipopolysaccharide+miR-204-5p mimic+empty vector group, lipopolysaccharide+miR-204-5p mimic+AURKB overexpression group. The levels of inflammatory cytokines in HAPI cells were detected using enzyme-linked immunosorbent assay. The expression levels of AURKB and Wnt/β-catenin pathway proteins in HAPI cells were detected by western blot assay. The targeting relationship between miR-204-5p and AURKB was verified by dual luciferase reporter gene assay. 
RESULTS AND CONCLUSION: Compared with the sham operation group, the expression of miR-204-5p in the dorsal root ganglion of rats with chronic constriction injury was significantly reduced. Compared with the model group, overexpression of miR-204-5p significantly increased the paw withdrawal threshold value and paw withdrawal latency. In rats with chronic constriction injury of the sciatic nerve and HAPI cells activated by lipopolysaccharide, overexpression of miR-204-5p could inhibit the secretion of inflammatory cytokines. The dual luciferase reporter gene confirmed AURKB as the downstream target gene of miR-204-5p. The expression level of AURKB mRNA was significantly increased in the dorsal root ganglion of rats with chronic constriction injury. Whereas silencing of AURKB could inhibit neuropathic pain and neuroinflammation. In lipopolysaccharide-induced HAPI cells, the overexpression of miR-204-5p reduced the expression of Wnt/β-catenin signaling pathway proteins by inhibiting the expression of AURKB, thereby reducing neuroinflammation. All the findings indicate that miR-204-5p relieves neuropathic pain in rats with chronic constriction injury of the sciatic nerve through the AURKB/Wnt/β-catenin pathway.

Key words: miR-204-5p, neuropathic pain, AURKB, chronic constriction injury, rat, Wnt pathway

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