吉林大学学报(医学版) ›› 2024, Vol. 50 ›› Issue (5): 1189-1195.doi: 10.13481/j.1671-587X.20240501

• 基础研究 •    

冷暴露对大鼠痛觉和感觉神经元中瞬时受体电位离子通道的影响

蒋鼎1,曹月龙1,徐勤光1,申安平1,王楠2,邱凤喜2,薛艳3()   

  1. 1.上海中医药大学附属曙光医院石氏伤科医学中心,上海 201203
    2.同济大学附属养志康复医院中医科,上海 201619
    3.同济大学附属养志康复医院智能康复临床研究中心,上海 201619
  • 收稿日期:2023-11-03 出版日期:2024-09-28 发布日期:2024-10-28
  • 通讯作者: 薛艳 E-mail:joycexy1103@163.com
  • 作者简介:蒋 鼎(1994―),男,四川省成都市人,在读博士研究生,主要从事中医药防治慢性筋骨疾病方面的研究。
  • 基金资助:
    国家自然科学基金项目(82305269);卫健委国家临床重点专科建设项目(2155080000004);科技部国家重点研发计划项目(2020YFC2008703);上海市科学技术委员会扬帆计划项目(21YF1443400);上海市卫健委临床研究专项(20224Y0209);上海市康复医学重中之重研究中心科研项目(2023ZZ02027)

Effect of cold exposure on nociception and transient receptor potential ion channels in sensory neurons in rats

Ding JIANG1,Yuelong CAO1,Qinguang XU1,Anping SHEN1,Nan WANG2,Fengxi QIU2,Yan XUE3()   

  1. 1.Shi’s Trauma Medicine Center,Affiliated Shuguang Hospital,Shanghai University of Traditional Chinese Medicine,Shanghai 201203,China
    2.Department of Traditional Chinese Medicine,Affiliated Yangzhi Rehabilitation Hospital,Tongji University,Shanghai 201619,China
    3.Intelligent Rehabilitation Clinical Research Center,Affiliated Yangzhi Rehabilitation Hospital,Tongji University,Shanghai 201619,China
  • Received:2023-11-03 Online:2024-09-28 Published:2024-10-28
  • Contact: Yan XUE E-mail:joycexy1103@163.com

摘要:

目的 探讨冷暴露对大鼠痛觉的影响及其对感觉神经元中瞬时受体电位(TRP)离子通道的调控机制,为阐明冷敏感性疼痛的生物学机制提供依据。 方法 16只雌性SD大鼠分为对照组(n=8)和寒冷组(n=8)。对照组大鼠置于(24±2)℃环境中,寒冷组大鼠每日置于人工智能气候室内进行低温(4 ℃±1 ℃)刺激4 h,连续1周。采用Von Frey纤维丝检测2组大鼠机械缩足反射阈值(MWT),采用组织免疫荧光染色法观察2组大鼠背根神经节(DRG)组织中TRPA1、TRPM8、TRPV1和TRPV4表达水平,大鼠DRG组织中降钙素基因相关肽(CGRP)和P物质(SP)表达水平以及大鼠滑膜组织中TRPA1、TRPM8、TRPV1和TRPV4表达水平。 结果 与对照组比较,寒冷组大鼠MWT明显降低(P<0.05),DRG组织中TRPA1和TRPM8表达水平明显升高(P<0.05),TRPV1表达水平明显降低(P<0.05),TRPV4表达水平差异无统计学意义(P>0.05),CGRP和SP表达水平明显升高(P<0.05)。与对照组比较,寒冷组大鼠滑膜组织中TRPA1表达水平明显升高(P<0.05),TRPM8、TRPV1和TRPV4表达水平明显降低(P<0.05)。 结论 短期冷暴露可引起大鼠痛觉过敏,其机制可能与DRG和滑膜组织中TRP离子通道表达变化有关联。TRPA1感觉神经元在关节局部冷痛中起重要作用。

关键词: 冷暴露, 背根神经节, 滑膜组织, 瞬时受体电位离子通道, 痛觉过敏

Abstract:

Objective To discuss the effect of cold exposure on nociception in the rats and its regulatory mechanism on transient receptor potential (TRP) ion channels in the sensory neurons, and to provide the basis for clarifying the biological mechanism of cold-sensitive pain. Methods Sixteen female SD rats were divided into control group (n=8) and cold group (n=8). The rats in control group were exposed to the environment of (24±2)℃, and the rats in cold group were exposed to low temperature (4 ℃±1 ℃) in an artificial intelligence climate chamber for 4 h daily, for one week. Von Frey filaments were used to detect the mechanical withdrawal threshold (MWT) of the rats in two groups; immunofluorescence staining was used to observe the expression levels of TRPA1, TRPM8, TRPV1, and TRPV4 in dorsal root ganglion (DRG) tissue of the rats in two groups, the expression levels of calcitonin gene-related peptide (CGRP) and substance P (SP) in DRG tissue of the rats in two groups, and the expression levels of TRPA1, TRPM8, TRPV1, and TRPV4 in synovial tissue of the rats in two groups. Results Compared with control group, the MWT of the rats in cold group was significantly decreased (P< 0.05), the expression levels of TRPA1 and TRPM8 in DRG tissue were significantly increased (P< 0.05), the expression level of TRPV1 was significantly decreased (P<0.05), there was no significant difference in the expression level of TRPV4 (P>0.05), and the expression levels of CGRP and SP were significantly increased (P<0.05). Compared with control group, the expression level of TRPA1 in synovial tissue of the rats in cold group was significantly increased (P<0.05), while the expression levels of TRPM8, TRPV1, and TRPV4 were significantly decreased (P<0.05). Conclusion Short-term cold exposure can induce the hyperalgesia of the rats, and its mechanism may be associated with the changes in the expression of TRP ion channels in DRG and synovial tissues. TRPA1 sensory neurons play an important role in local joint cold pain.

Key words: Cold exposure, Dorsal root ganglion, Synovial tissue, Transient recptor potential ion channel, Hyperalgesia

中图分类号: 

  • R36