학술논문
前扣带回内肿瘤坏死因子α过表达在神经病理性疼痛中的作用 / Role of TNF-αin Anterior Cingulate Cortex in Neuropathic Pain Induced by Sciatic Nerve Injury
Document Type
Academic Journal
Author
王少坤; 陈少霞; 姚沛汶; 孙梓乘; 那晓东; 臧颖; WANG Shao-kun; CHEN Shao-xia; YAO Pei-wen; SUN Zi-cheng; NA Xiao-dong; ZANG Ying
Source
中山大学学报（医学科学版）. 38(1):8-14
Subject
Language
Chinese
ISSN
1672-3554
Abstract
【目的】探讨坐骨神经部分损伤对前扣带回（ACC）内致炎细胞因子TNF-α、IL-1β和抗炎细胞因子IL-10表达的影响，并分析它们在神经病理性疼痛中的可能作用。【方法】采用行为学、Western blot、免疫荧光组织化学方法，观察外周神经损伤后ACC内上述细胞因子表达的改变以及ACC内微量注射相应中和抗体对大鼠痛行为的影响。【结果】（1）坐骨神经部分损伤（SNI）诱导大鼠损伤侧触诱发痛并伴有ACC内致炎细胞因子TNF-α和抗炎细胞因子IL-10蛋白水平显著升高，其中TNF-α升高幅度更大，但对IL-1β的表达无影响；（2）免疫荧光双染结果表明SNI后ACC内上调的TNF-α以及IL-10都表达于神经元而非胶质细胞内；（3）通过SNI术前及术后连续多次在ACC内微量注射TNF-α中和抗体，显著缓解大鼠触诱发痛，但给予IL-1β中和抗体对大鼠痛行为无影响。【结论】以上结果表明坐骨神经损伤可能通过诱导ACC神经元内TNF-α异常分泌易化脊髓背角痛信息传入。
Objective]To discuss the effect of sciatic nerve injury on the expressions of tumor necrosis factor-alpha(TNF-α), interleukin-1β(IL-1β)and interleukin-10(IL-10)in anterior cingulate cortex(ACC),and further to explain their roles resided in the development of neuropathic pain.[Method]With use of the methods of behavioral test,western blot and immunohistochemistry, we examine the effects of spared sciatic nerve injury(SNI)on the expressions of TNF-α,IL-1β,and IL-10 in ACC,and observe the effect of the neutralizing antibody of TNF-α,IL-1β on the rat mechanical allodynia.[Result]In present experiment ,SNI increased the protein levels of TNF-α,IL-10,but not IL-1β in ACC. Increased TNF-α-IR and IL-10-IR in ACC is located in neurons ,but not astrocytes and microglia at 7 d following L5-VRT. Pre-treatment with anti-TNFα antibody but not anti-IL-1βantibody into ACC significantly increased the rat paw withdrawal threshold to von Frey hairs.[Conclusion]These data suggested that the increased TNF-αin ACC neurons might be responsible for the development of neuropathic pain.
Objective]To discuss the effect of sciatic nerve injury on the expressions of tumor necrosis factor-alpha(TNF-α), interleukin-1β(IL-1β)and interleukin-10(IL-10)in anterior cingulate cortex(ACC),and further to explain their roles resided in the development of neuropathic pain.[Method]With use of the methods of behavioral test,western blot and immunohistochemistry, we examine the effects of spared sciatic nerve injury(SNI)on the expressions of TNF-α,IL-1β,and IL-10 in ACC,and observe the effect of the neutralizing antibody of TNF-α,IL-1β on the rat mechanical allodynia.[Result]In present experiment ,SNI increased the protein levels of TNF-α,IL-10,but not IL-1β in ACC. Increased TNF-α-IR and IL-10-IR in ACC is located in neurons ,but not astrocytes and microglia at 7 d following L5-VRT. Pre-treatment with anti-TNFα antibody but not anti-IL-1βantibody into ACC significantly increased the rat paw withdrawal threshold to von Frey hairs.[Conclusion]These data suggested that the increased TNF-αin ACC neurons might be responsible for the development of neuropathic pain.