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中国临床药理学与治疗学 ›› 2014, Vol. 19 ›› Issue (7): 743-746.

• 基础研究 • 上一篇    下一篇

从大鼠脊髓背角Iba1的表达探讨天麻素对化疗诱导神经病理性疼痛的作用及其机制

宫登辉, 郑卫红, 罗妮, 汤桂成   

  1. 三峡大学医学院国家中药药理三级实验室,宜昌443002,湖北
  • 收稿日期:2013-08-21 修回日期:2014-06-25 发布日期:2014-07-21
  • 通讯作者: 汤桂成,男,讲师,研究方向:神经药理学。Tel:0717-6397501 E-mail:zwh20110606@163.com
  • 作者简介:宫登辉,男,硕士研究生在读,研究方向:神经药理。Tel:13997716369 E-mail:gdh89@163.com
  • 基金资助:
    湖北省自然科学基金项目(2013CFC066);宜昌市科学研究与开 发项目(A13301-57);三峡大学研究生科研创新基金 (2012CX061)

Effects and the mechanism of gastrodin on chemotherapy-induced neuropathic pain through the expression of Iba1 of spinal dorsal horn

GONG Deng-hui, ZHENG Wei-hong, LUO Ni, TANG Gui-chen   

  1. Third-grade Pharmacology Laboratory on Traditional Chinese Medicine Approved by State Administration of Traditional Chinese Medicine, Medical Science College of China Three Gorges University, Yichang 443002, Hubei,China
  • Received:2013-08-21 Revised:2014-06-25 Published:2014-07-21

摘要: 目的 观察天麻素对化疗痛大鼠脊髓背角小胶质细胞活化的影响。方法 根据痛阈值大小筛选出合格的SD大鼠30 只,采用随机配伍的方法分为5组:对照组、模型组、天麻素低剂量组(30 mg/kg)、天麻素中剂量组(60 mg/kg)、天麻素高剂量组(120 mg/kg)。用隔日腹腔注射长春新碱(125 μg/kg)的方法建立化疗痛动物模型,采用不同剂量的天麻素治疗化疗痛大鼠,分别用Electronic vonfrey测痛仪和热刺痛仪测定大鼠机械痛阈值及热痛阈值;免疫荧光法检测脊髓背角小胶质细胞特异性活化标志物Iba1的表达。结果 与对照组比较,模型组大鼠机械痛阈值和热痛阈值明显降低(P<0.05 或P<0.01),脊髓背角Iba1表达显著升高(P<0.01);与模型组比较,天麻素治疗组大鼠机械痛阈值与热痛阈值有不同程度的增高(P<0.05 或P<0.01),脊髓背角Iba1表达有不同程度的降低(P<0.05 或P<0.01)。结论 天麻素能减轻化疗痛大鼠的机械痛敏和热痛敏反应,该作用可能与其抑制脊髓小胶质细胞活化有关。

关键词: 天麻素, 化疗痛, 长春新碱, 小胶质细胞

Abstract: AIM: To observe the effects of gastrodin on expression of Iba1 in spinal cord in rats with vincristine-induced neuropathic pain. METHODS: SD rats were divided into 5 groups with random block design : control group, model group, gastrodin group (30 mg/kg, 60 mg/kg,120 mg/kg). Vincristine (125 μg/kg, i.p.) was administered to rats on alternate days to establish chemotherapy-induced neuropathic pain model in rat, then treated with different dose of gastrodin. Pain threshold and expression of Iba1 was determined respectively.RESULTS:Compared with control group, the pain threshold decreased in model group (P<0.05 or P<0.01).Compared with model group, the pain threshold increased in gastrodin groups (30 mg/kg,60 mg/kg,120 mg/kg) (P<0.05 or P<0.01). Moreover, compared with control group, the expression of Iba1 increased in model group (P<0.01).Compared with model group, the expression of Iba1 decreased in gastrodin groups (60 mg/kg,120 mg/kg) (P<0.05 or P<0.01).CONCLUSION: Gastrodin can relieve the chemotherapy-induced neuropathic pain, probably by inhibiting the activation of spinal dorsal horn microglia.

Key words: gastrodin, chemotherapy-induced neuropathic pain, vincristine, microglia

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