电针药氧对大鼠全脑缺血再灌注后Bcl-2、Bax蛋白表达的影响

目的:探讨电针药氧对大鼠全脑缺血再灌注后海马CA1区Bcl-2、Bax蛋白表达的影响。方法:采用改良Pulsinelli4血管阻断全脑缺血方法,建立短暂反复全脑缺血再灌注大鼠模型。大鼠随机分为假手术组、模型组、电针组、药氧组、电针药氧联合组,每组6只。电针组电针大鼠"百会""后三里",频率100Hz,强度3.5mA,每次30min,每日1次,共治疗4次;药氧组大鼠吸取药氧液;电针药氧联合组采用电针结合药氧治疗。采用免疫组化方法检测大鼠海马CA1区Bcl-2、Bax蛋白阳性细胞数目、平均吸光度值。结果:模型组与假手术组比较海马CA1区Bcl-2、Bax蛋白阳性细胞数目和平均吸光度值均增高(P0.05,P0.01);电针组、药氧组及电针药氧联合组与模型组比较Bcl-2蛋白阳性细胞数目和平均吸光度值增高,Bax蛋白阳性细胞数目和平均吸光度值降低(P0.01);电针药氧联合组各指标的变化较电针组和药氧组更明显(P0.01)。结论:全脑缺血后早期电针药氧可上调Bcl-2、下调Bax蛋白的表达,这可能是电针药氧治疗缺血性脑血管病的机制之一。

Effects of Electroacupuncture plus Oxygenmedicine on the Expression of Bcl-2 and Bax Proteins in the Hippocampal CA1 Area in Rats with Global Cerebral Ischemia/Reperfusion Injury

Objective To observe the effect of electroacupuncture (EA) plus oxygenmedicine (OM) on the expression of Bcl-2 and Bax in the hippocampal CA 1 area in cerebral ischemia/reperfusion injury (CI/RI) rats. Methods Thirty SD rats were randomized into sham-operation,model,EA,OM,EA+OM groups (n=6/group). CI/RI model was established by using modified Pulsinelli 4 vessel occlusion and reperfusion. EA (100 Hz,3.5 mA) was applied to "Baihui" (GV 20) and "Zusanli" (ST 36) 30 min,once daily for 4 days. Rats of OM and EA+OM groups were put into a box filled with oxygen and atomized herbal medicines containing Bingpian (Borneolum),Shexiang (Moschus),Huangjing (Rhizoma Polygonati),Shouwu (Radix Polygoni Multiflori),etc. for 30 min,once daily for 4 days. Bcl-2 and Bax expression of the hippocampal CA 1 area was detected by immunohistochemistry. Results Compared with sham group,the numbers of Bcl-2 immunoreaction (IR) and Bax IR positive cells,and the immunoactivity of Bcl-2 IR and Bax IR positive products in the hippocampal CA 1 area were increased significantly in model group (P<0.05,P<0.01). In comparison with model group,the number of Bcl-2 IR positive cells and Bcl-2 immunoactivity in EA,OM and EA+OM groups increased considerably (P<0.01),while Bax IR positive cell numbers and Bax immunoactivity in EA,OM and OM+EA groups decreased significantly (P<0.01). The effects of EA+OM were significantly superior to those of EA and OM groups in upregulating Bcl-2 IR positive cell number and Bcl-2 immunoactivity and downregulating Bax IR positive cell number and Bax immunoactivity (P<0.01). No significant differences were found between EA and OM groups in the abovementioned indexes (P>0.05). Conclusion EA and OM and EA+OM can effectively regulate the expression of Bcl-2 and Bax in the hippocampal CA 1 area in CI/RI rats,and the effects of EA+OM are significantly superior to those of simple EA and simple OM,which may contribute to their effect in improving cerebral ischemia.