中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (2): 230-236.doi: 10.12307/2022.934

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

miR-132-3p靶向调节Ptch1减轻慢性压迫性神经损伤小鼠神经性疼痛

赵  峰1,樊少卿1,程晓燕1,李小娜1,李长生2,马浩杰1   

  1. 1河南省中医院麻醉科,河南省郑州市  450002;2河南省肿瘤医院麻醉与围术期医学科,河南省郑州市  450003
  • 收稿日期:2021-07-13 接受日期:2021-10-28 出版日期:2023-01-18 发布日期:2022-06-20
  • 通讯作者: 赵峰,硕士,副主任医师,河南省中医院麻醉科,河南省郑州市 450002
  • 作者简介:赵峰,男,1970年生,河南省驻马店市人,2017年新乡医学院毕业,硕士,副主任医师,主要从事临床麻醉,疼痛及舒适化诊疗研究。
  • 基金资助:
    河南省医学科技攻关计划项目(201702242),项目负责人:李长生;河南省科技攻关国际联合项目(182102410015),项目负责人:李长生

miR-132-3p targets and modulates Ptch1 to reduce neuropathic pain in mice with chronic constriction injury

Zhao Feng1, Fan Shaoqing1, Cheng Xiaoyan1, Li Xiaona1, Li Changsheng2, Ma Haojie1   

  1. 1Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450002, Henan Province, China; 2Department of Anesthesiology and Perioperative Medicine, Henan Cancer Hospital, Zhengzhou 450003, Henan Province, China
  • Received:2021-07-13 Accepted:2021-10-28 Online:2023-01-18 Published:2022-06-20
  • Contact: Zhao Feng, Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450002, Henan Province, China
  • About author:Zhao Feng, Master, Associate chief physician, Department of Anesthesiology, Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou 450002, Henan Province, China
  • Supported by:
    the Medical Science and Technology Project of Henan Province, No. 201702242 (to LCS); the International Science and Technology Cooperation Program in Henan Province, No. 182102410015 (to LCS)

摘要:

文题释义:
Ptch1:由Patched编码的Ptch受体,能与Hh配体直接结合。当Shh沉默时,Ptch与Smo结合抑制Smo的活性,当Shh被激活时,与Ptch结合使Smo游离并被激活,活化下游Gli1。Shh可与Ptch/Smo蛋白复合物结合,参与调节神经元在内的各种细胞的生长和分化,在神经发育过程中起重要作用。
慢性压迫性神经损伤:慢性压迫性神经损伤造成由躯体感觉传入神经系统损伤所引起的疼痛,属于神经病理性疼痛,建立慢性压迫性神经损伤小鼠模型可用于研究神经病理性疼痛产生、维持的机制,为其治疗寻找新的方法。

背景:神经病理性疼痛的发病机制复杂,病理过程繁多,miR-132在神经病理性疼痛传导通路中异常表达,影响疼痛的发生、发展过程。
目的:探讨miR-132-3p在慢性压迫性神经损伤小鼠神经性疼痛中所发挥的作用及机制。
方法:①小鼠小胶质细胞BV2经100 μg/L 脂多糖刺激建立活化模型,采用Western blot检测小胶质细胞激活标记物IBA1的表达,RT-qPCR检测miR-132-3p的表达。将miR-132-3p mimic或inhibitor分别转染至BV2细胞,采用Western blot检测IBA1以及P2X4R的表达。预测并验证miR-132-3p的靶向调节作用,将Ptch1表达载体pcDNA-Ptch1或si-Ptch1转染BV2细胞24 h后用脂多糖刺激培养24 h,采用Western blot检测IBA1、P2X4R以及Shh信号通路标记蛋白的表达。BV2细胞共转染miR-132-3p-mimic和pcDNA-Ptch1 24 h后用脂多糖刺激培养24 h,采用Western blot检测上述蛋白的表达。②30只C57BL/6小鼠随机分为对照组(n=6),假手术组(n=6),模型组(n=6),NC-mimic组(n=6),miR-132-3p-mimic组(n=6),后两组经鞘内注射NC-mimic和miR-132-3p-mimic,检测各组小鼠机械缩足反射阈值和热阈值,行为学检测后取背根神经节,采用RT-qPCR检测miR-132-3p的表达,Western blot检测Ptch1、P2X4R和Shh通路标记蛋白的表达,进一步验证miR-132-3p在慢性压迫性神经损伤小鼠神经性疼痛中发挥的作用及机制。
结果与结论:①与对照组比较,脂多糖刺激促进BV2细胞的激活(P < 0.05),下调miR-132-3p的表达(P < 0.05);②miR-132-3p通过靶向调节Ptch1抑制Shh信号通路的激活,并进一步抑制BV2细胞的激活以及P2X4R的表达,过表达Ptch1可以逆转miR-132-3p-mimic的作用(P < 0.05);③成功建立慢性压迫性神经损伤模型,与注射NC-mimic组相比,鞘内注射miR-132-3p-mimic下调Ptch1的表达(P < 0.05),抑制Shh信号通路的激活(P < 0.05),减少P2X4R的表达(P < 0.05),并显著提高慢性压迫性神经损伤小鼠的机械缩足反射阈值和热阈值(P < 0.01);④结果表明,miR-132-3p通过靶向调节Ptch1抑制Shh信号通路的激活,减轻慢性压迫性神经损伤小鼠的神经性疼痛。

https://orcid.org/0000-0001-8958-4943 (赵峰)

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-132-3p, Ptch1, Shh信号通路, 慢性压迫性神经损伤, 神经性疼痛, 小胶质细胞

Abstract: BACKGROUND: The pathogenesis of neuropathic pain involving many pathological processes is complex. miR-132, which is abnormally expressed in neuropathic pain conduction pathway, affects the occurrence and development of pain.
OBJECTIVE: To investigate the role and mechanism of miR-132-3p in neuropathic pain in mice with chronic constriction injury. 
METHODS: Mouse microglia BV2 cells were stimulated with 100 ng/mL lipopolysaccharide to establish an activation model. The expression of ionized calcium binding adapter molecule 1 (IBA1), a marker for microglia activation, was detected by western blot. The expression of miR-132-3p was detected by RT-qPCR. After transfecting miR-132-3p mimic or inhibitor into activated BV2 cells, the expression of IBA1 and P2X4 receptor (P2X4R) was detected by western blot. miR-132-3p targeted and regulated Ptch1, which was predicted and verified. pcDNA-Ptch1 or si-Ptch1 was transfected into BV2 cells for 24 hours and then stimulated with lipopolysaccharide for 24 hours. The expression of IBA1, P2X4R and Sonic Hedgehog (Shh) signaling pathway marker proteins was detected by Western blot. BV2 cells were co-transfected with miR-132-3p-mimic and pcDNA-Ptch1 for 24 hours and then stimulated by lipopolysaccharide for 24 hours. The expression of the above proteins was further detected by western blot. Thirty C57BL/6 mice were randomly divided into control group (n=6), sham group (n=6), model group (n=6), NC-mimic group (n=6) and miR-132-3p-mimic group (n=6). The latter two groups were injected intrathecally with NC-mimic and miR-132-3p-mimic, respectively. The mechanical withdrawal threshold and thermal withdrawal latency were monitored. The expression of miR-132-3p, Ptch1, P2X4R and Shh pathway marker proteins in dorsal root ganglion was detected by RT-qPCR and western blot to clarify the role and mechanism of miR-132-3p in chronic constriction injury-induced neuropathic pain. 
RESULTS AND CONCLUSION: Compared with the control group, lipopolysaccharide stimulation promoted the activation of BV2 cells (P < 0.05) and down-regulated the expression of miR-132-3p (P < 0.05). miR-132-3p inhibited the activation of Shh signaling pathway through targeted regulation of Ptch1, and further inhibited the activation of BV2 cells and the expression of P2X4R. Overexpression of Ptch1 could reverse the effect of miR-132-3p-mimic (P < 0.05). The chronic constriction injury model was successfully established. Compared with the NC-mimic injection group, intrathecal injection of miR-132-3p-mimic could down-regulate the expression of Ptch1 (P < 0.05), inhibit the activation of the Shh signaling pathway (P < 0.05), reduce the expression of P2X4R (P < 0.05), and significantly increase the mechanical withdrawal threshold and thermal withdrawal latency of mice with chronic constriction injury (P < 0.01). Overall, miR-132-3p can reduce neuropathic pain in mice with chronic constriction injury by targeting Ptch1 and inhibiting the activation of Shh signaling pathway.

Key words: miR-132-3p, Ptch1, the Sonic Hedgehog (Shh) signaling pathway, chronic constriction injury, neuropathic pain, microglia

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