眼针对脑缺血再灌注大鼠脑内脑源性神经营养因子表达的影响

目的：观察眼针疗法与体针疗法对脑缺血再灌注损伤（CIRI）模型大鼠脑源性神经营养因子（BDNF）表达的影响,探讨眼针与体针效应的差异。方法：将SD大鼠随机分为正常组、假手术组、模型组、眼针穴区组、眼针穴区外组与体针组,每组8只。线栓法制备大鼠大脑中动脉梗死再灌注模型。眼针穴区组取＂肝区＂＂上焦区＂＂下焦区＂＂肾区＂。眼针穴区外组选择眼针同名穴区的外3 mm处针刺。体针组取＂曲池＂＂足三里＂穴针刺。采用Zea Longa评分法进行大鼠神经功能评分,实时定量PCR方法检测缺血再灌注72 h后脑内BDNF mRNA的表达,蛋白免疫印迹法检测缺血再灌注后72 h脑组织BDNF蛋白的表达。结果：眼针穴区组和体针组大鼠神经功能缺损症状较模型组大鼠减轻（P〈0.01）,眼针穴区组与体针组相比差异无统计学意义（P〉0.05）;眼针穴区组和体针组较模型组大鼠脑内BDNF mRNA和蛋白含量均升高（P〈0.01）,眼针穴区组与体针组比较差异无统计学意义（P〉0.05）。结论：眼针与体针在改善脑缺血再灌注损伤中的作用接近,两种疗法的作用机制可能均与脑内BDNF的表达上调从而促进脑组织的修复有关。

Effects of eye-acupuncture on the expression of brainderived neurotrophic factor in the brain of rats with cerebral ischemia reperfusion

Objective To observe the effects of eye-acupuncture therapy and bodyacupuncture therapy on the expression of brain-deprived neurotrophic factor （BDNF） in rats with cerebral ischemia reperfusion injury （CIRI）. Methods According to random number table, 48 SD rats were randomly divided into 6 groups, including normal control group （group A）, sham operation group （group B）, model group （group C）, eye-acupuncture group （group D）, non-acupoint of eye-acupuncture group （group E） and body-acupuncture group （group F）, eight rats in each group. Artery infarction reperfusion model were prepared by using suture-occluded method. Liver region, upper energizer area, lower energizer area and kidney region were selected in the group D. Acupuncture was carried out at the point located at 3 mm from the acupoint areas in the group E. Qūchí （曲池 LI 11）, Zúsānl （足三里 ST 36） and other acupoints were selected in the group F. Zea Longa scoring method was utilized for scoring the neural functions of rats; real-time PCR was carried out to examine the expression level of BDNF mRNA in the brain 72 h after ischemia reperfusion; western blot was carried out to examine the expression level of BDNF protein in the brain 72 h after ischemia reperfusion. Results The symptoms of neurologic impairments in the rats of the group D were alleviated in comparison to those in the group C （P0.01）, and the difference between the group D and the group F was not statistically significant （P0.05）; Compared with the group C, the mRNA and protein expression levels of BDNF in the brain of rats in the group D and the group F both increased （P0.01）, but the difference between the group D and the group F was not statistically significant （P0.05）. Conclusion The functions of eye-acupuncture and body-acupuncture in improving cerebral ischemia reperfusion injury are similar, and the functional mechanisms for the two different therapies may be related to the up-regulation of BDNF expression in brain and thus promote the repairing of brain tissues.