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Botulinum toxin type A and gabapentin attenuate postoperative pain and NK1 receptor internalization in rats
Neurochemistry international ( IF 4.2 ) Pub Date : 2018-03-20
Xueyang Li, Ruijuan Guo, Yuqing Sun, Huili Li, Danxu Ma, Chen Zhang, Yun Guan, Junfa Li, Yun Wang

Treatment of postoperative pain remains a challenge in clinic. Botulinum toxin type A (BoNT/A) and gabapentin regulate the release of neurotransmitters from primary afferent neurons, but their effects of on postoperative pain are not clear. In the current study, using pain behavioral tests, Western blot analysis, and immunocytochemistry, we examined whether BoNT/A, alone or in combination with intrathecal gabapentin, inhibited pain hypersensitivity and attenuated the increase in neurokinin 1 (NK1) receptor internalization in dorsal horn neurons after plantar incision. Our data showed that pretreatment of rats with an intraplantar (2 U) 24 h before plantar incision or intrathecal (0.5 U) injection of BoNT/A 48 h before plantar incision induced a prolonged (3–5 days) decrease in pain scores and mechanical hypersensitivity, as compared to those observed with saline pretreatment. Both intraplantar and intrathecal BoNT/A pretreatment reduced synaptosomal-associated protein 25 levels in the ipsilateral lumbar dorsal root ganglia and spinal cord dorsal horn, and attenuated the increase in NK1 receptor internalization in dorsal horn neurons. Intrathecal administration of a sub-effective dose of gabapentin (50 μg) with BoNT/A (0.5 U) induced greater inhibition of pain hypersensitivity and NK1 receptor internalization than BoNT/A alone. These findings suggest that pretreatment with BoNT/A, alone or in combination with intrathecal gabapentin, may present a promising multimodal analgesia regimen for postoperative pain treatment.



中文翻译:

A型肉毒杆菌毒素和加巴喷丁减轻大鼠的术后疼痛和NK1受体内在化

术后疼痛的治疗仍然是临床上的挑战。A型肉毒杆菌毒素(BoNT / A)和加巴喷丁调节初级传入神经元的神经递质释放,但它们对术后疼痛的影响尚不清楚。在当前的研究中,我们使用疼痛行为测试,蛋白质印迹分析和免疫细胞化学,检查了BoNT / A单独或与鞘内加巴喷丁联合使用是否能抑制疼痛超敏性并减轻背角神经激肽1(NK1)受体内在化的增加。足底切口后的神经元。我们的数据表明,在足底切开术前24 h用足底(2 U)或在鞘内切开术前48 h用鞘内(0.5 U)注射BoNT / A预处理大鼠可导致疼痛评分和机械性的持续时间降低(3-5天)。过敏症 与盐水预处理所观察到的相比。NT骨内和鞘内BoNT / A预处理均降低了同侧腰背根神经节和脊髓背角中突触体相关蛋白25的水平,并减弱了背角神经元中NK1受体内在化的增加。与BoNT / A相比,鞘内注射亚有效剂量的加巴喷丁(50μg)与BoNT / A(0.5 U)引起的疼痛超敏性和NK1受体内化的抑制作用更大。这些发现表明,单独或与鞘内加巴喷丁联合使用BoNT / A进行预处理,可能会为术后疼痛治疗提供一种有希望的多模式镇痛方案。NT骨内和鞘内BoNT / A预处理均降低了同侧腰背根神经节和脊髓背角中突触体相关蛋白25的水平,并减弱了背角神经元中NK1受体内在化的增加。与BoNT / A相比,鞘内注射亚有效剂量的加巴喷丁(50μg)与BoNT / A(0.5 U)引起的疼痛超敏性和NK1受体内化的抑制作用更大。这些发现表明,单独或与鞘内加巴喷丁联合使用BoNT / A进行预处理,可能会为术后疼痛治疗提供一种有希望的多模式镇痛方案。NT骨内和鞘内BoNT / A预处理均降低了同侧腰背根神经节和脊髓背角中突触体相关蛋白25的水平,并减弱了背角神经元中NK1受体内在化的增加。与BoNT / A相比,鞘内注射亚有效剂量的加巴喷丁(50μg)与BoNT / A(0.5 U)引起的疼痛超敏性和NK1受体内化的抑制作用更大。这些发现表明,单独或与鞘内加巴喷丁联合使用BoNT / A进行预处理,可能会为术后疼痛治疗提供一种有希望的多模式镇痛方案。与BoNT / A相比,鞘内注射亚有效剂量的加巴喷丁(50μg)与BoNT / A(0.5 U)引起的疼痛超敏性和NK1受体内化的抑制作用更大。这些发现表明,单独或与鞘内加巴喷丁联合使用BoNT / A进行预处理,可能会为术后疼痛治疗提供一种有希望的多模式镇痛方案。与BoNT / A相比,鞘内注射亚有效剂量的加巴喷丁(50μg)与BoNT / A(0.5 U)引起的疼痛超敏性和NK1受体内化的抑制作用更大。这些发现表明,单独或与鞘内加巴喷丁联合使用BoNT / A进行预处理,可能会为术后疼痛治疗提供一种有希望的多模式镇痛方案。

更新日期:2018-03-20
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