头针对急性脑缺血再灌注大鼠炎症反应的影响

目的:探讨头针治疗脑缺血的作用机制。方法:将70只健康SD雌性女鼠随机分为假手术组、模型组和头针组,模型组和头针组再根据缺血再灌注时间的不同(24h、48h、72h),各随机分为3个亚组。采用大脑中动脉线栓法制备大脑中动脉闭塞(middle cerebral artery occlusion.MCAO)再灌注模型,应用神经功能缺损评分(neurological seventy score,NSS)、HE染色及酶联免疫吸附反应观察急性脑缺血再灌注各时间点头针对模型大鼠神经功能缺损,缺血脑组织的炎性浸润,血浆及缺血脑组织肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、白细胞介素-1β(interleu- kin-1β,IL-1β)和IL-10含量的影响。结果:头针组与模型组各时相的NSS比较,差异均有统计学意义(P<0.01),以脑缺血再灌注72h时较明显。头针组各时相白细胞浸润较模型组明显减少(P<0.01),以脑缺血再灌注72h最为明显。头针组与模型组比较,各时相血浆和脑组织TNF-α、IL-1β的拿量均减少,造模后72h,两组比较差异有统计学意义(P<0.01);IL-10的分量则增高,造模后48和72h,两组比较差异有统计学意义(P<0.05.P<0.01)。结论:头针有利于大鼠脑神经功能的恢复,可减轻急性恼缺血再灌注后白细胞的浸润,并在一定范围内降低TNF-α和IL-1β表达,增强IL-10表达,从而减缓由其个导的炎症免疫反应,减轻脑缺血再灌注损伤。

Effect of scalp acupuncture on inflammatory response in rats with acute cerebral ischemia-reperfusion injury

OBJECTIVE: To explore the mechanism of scalp acupuncture (SA) in treating cerebral ischemia. METHODS: Sixty SD rats with middle cerebral artery occlusion (MCAO) were randomized into untreated group and SA-treated group, with another group of 10 SD rats without artery occlusion as sham-operated control. Neurological severity score (NSS), hemetoxylin and eosin (HE) staining and enzyme-linked immunosorbent assay were applied to observing the changes of neurofunctional defect, inflammatory infiltration in cerebral tissue and content of tumor necrosis factor-alpha (TNF-alpha), interleukin-1beta (IL-1beta) and IL-10 at 24, 48 and 72 h after ischemia-reperfusion. RESULTS: There existed significant difference in NSS between SA-treated group and untreated group (P<0.01), especially at 72 h after ischemia-reperfusion. The HE staining results of ischemic cerebral tissue showed an apparent reduction of inflamed lesions in SA-treated group as compared with the untreated group (P<0.01), especially at 72 h after ischemia-reperfusion. The content of TNF-alpha and IL-1beta at each phase point after ischemia-reperfusion in SA-treated was decreased as compared with that in the untreated group, and there were differences between SA-treated group and untreated group at 72 h after ischemia-reperfusion (P<0.01). An apparent increase was observed in IL-10 between SA-treated group and untreated group at each phase point after ischemia-reperfusion, and there were significant differences between SA-treated group and untreated group at 48 and 72 h after ischemia-reperfusion (P<0.05, P<0.01). CONCLUSION: Scalp acupuncture can improve neurofunctional rehabilitation, suppress leukocyte infiltration, decrease the content of TNF-alpha and IL-1beta within a certain range and enhance IL-10 expression so as to suppress cytokines-mediated inflammatory reaction and attenuate cerebral ischemia-reperfusion injury.