Celastrol attenuates inflammatory and neuropathic pain mediated by cannabinoid receptor type 2.

Celastrol attenuates inflammatory and neuropathic pain mediated by cannabinoid receptor type 2.
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雷公藤红醇可减轻 2 型大麻素受体介导的炎症和神经性疼痛

DOI:
10.3390/ijms150813637
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发表时间:
2014-08-06
影响因子:
5.6
通讯作者:
Qiu Y
Qiu Y
中科院分区:
生物学2区
文献类型:
--
作者:
Yang L;Li Y;Ren J;Zhu C;Fu J;Lin D;Qiu Y

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雷公藤红素是中药雷公藤的主要活性成分。F.(雷神藤)具有广泛的药理活性,包括抗炎、抗癌和免疫抑制。在本研究中,我们使用的动物模型的炎性疼痛和神经病理性疼痛,所产生的角叉菜胶注射和备用神经损伤(SNI),分别评估雷公藤红素的效果,并解决疼痛处理的机制。腹膜内(i. p.)注射雷公藤红素对角叉菜胶诱导的水肿和异常性疼痛产生剂量依赖性抑制。实时PCR分析显示雷公藤红素(0.3mg/kg,i. p.)显著降低角叉菜胶注射小鼠炎性细胞因子TNF-α、IL-6、IL-1β的mRNA表达。在SNI小鼠中,疼痛行为研究显示雷公藤红素(lmg/kg,i. p.)有效地防止了术后第三天和术后第七天机械伤害性反应的超敏反应。此外,雷公藤红素在角叉菜胶注射小鼠和SNI小鼠中的抗痛觉过敏作用被SR 144528(1 mg/kg,i. p.)逆转,特异性大麻素受体-2(CB 2)受体拮抗剂,但不受SR 141716(1 mg/kg,i. p.)的影响,一种特异性大麻素受体-1(CB 1)受体拮抗剂。综上所述,我们的研究结果证明了雷公藤红素通过CB 2信号传导的镇痛作用,并提出了开发雷公藤红素作为一种新的疼痛缓解候选药物的潜力。
Celastrol, a major active ingredient of Chinese herb Tripterygium wilfordii Hook. f. (thunder god vine), has exhibited a broad spectrum of pharmacological activities, including anti-inflammation, anti-cancer and immunosuppression. In the present study, we used animal models of inflammatory pain and neuropathic pain, generated by carrageenan injection and spared nerve injury (SNI), respectively, to evaluate the effect of celastrol and to address the mechanisms underlying pain processing. Intraperitoneal (i.p.) injection of celastrol produced a dose-dependent inhibition of carrageenan-induced edema and allodynia. Real-time PCR analysis showed that celastrol (0.3 mg/kg, i.p.) significantly reduced mRNA expressions of inflammatory cytokines, TNF-α, IL-6, IL-1β, in carrageenan-injected mice. In SNI mice, pain behavior studies showed that celastrol (1 mg/kg, i.p.) effectively prevented the hypersensitivity of mechanical nociceptive response on the third day post-surgery and the seventh day post-surgery. Furthermore, the anti-hyperalgesic effects of celastrol in carrageenan-injected mice and SNI mice were reversed by SR144528 (1 mg/kg, i.p.), a specific cannabinoid receptor-2 (CB2) receptor antagonist, but not by SR141716 (1 mg/kg, i.p.), a specific cannabinoid receptor-1 (CB1) receptor antagonist. Taken together, our results demonstrate the analgesia effects of celastrol through CB2 signaling and propose the potential of exploiting celastrol as a novel candidate for pain relief.
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