促红细胞生成素对缺氧缺血性脑损伤新生大鼠脑组织存活素表达及神经细胞凋亡的影响

被引:11
作者
陈晓晴
许华
罗小平
黎萍
机构
[1] 广州中医药大学第一附属医院儿科
[2] 华中科技大学同济医学院附属同济医院儿科
[3] 广州医学院第三附属医院儿科
关键词
促红细胞生成素; 缺氧缺血性脑损伤; 存活素; 凋亡; 大鼠; 新生;
D O I
暂无
中图分类号
R722.1 [新生儿疾病];
学科分类号
100202 ;
摘要
目的探讨促红细胞生成素(EPO)对缺氧缺血性脑损伤(HIBD)新生大鼠缺血侧脑组织存活素表达的影响及神经保护机制。方法健康7日龄SD新生大鼠72只,随机分为假手术组(n=24)、对照组(n=24)及EPO治疗组(n=24)。采用结扎左侧颈总动脉并吸入80mL.L-1氧气2h制作新生大鼠HIBD动物模型,造模后1d、3d、7d和14d取其脑组织标本,应用免疫组织化学法及脱氧核糖核苷酸末端转移酶介导的原位末端标记法分别对存活素的表达和细胞凋亡指数(AI)进行检测。结果与假手术组相比,对照组1d、3d、7d和14d缺血侧脑皮质存活素表达的吸光度值[(1.43±0.68)vs(0.13±0.03);(3.68±1.04)vs(1.69±0.19);(4.29±1.50)vs(0.36±0.05);(3.70±1.16)vs(0.98±0.26),Pa<0.01]及细胞AI值[(14.2±2.7)%vs(8.4±1.6)%;(16.5±3.5)%vs(1.4±1.1)%;(18.8±4.7)%vs(1.6±0.8)%;(8.2±3.1)%vs(2.2±1.7)%,Pa<0.01]均明显升高;与对照组相比,EPO治疗组1d、3d的存活素表达明显升高[(3.38±1.30)vs(1.43±0.68);(7.52±1.94)vs(3.68±1.04),Pa<0.05],细胞AI值1d、3d、7d明显降低[(9.8±2.1)%vs(14.2±2.7)%;(9.6±2.9)%vs(16.5±3.5)%;(10.6±2.8)%vs(18.8±4.7)%,Pa<0.05]。结论 EPO可通过促进抗凋亡因子存活素的表达而减少HIBD后的细胞凋亡,发挥其神经保护作用。
引用
收藏
页码:91 / 93
页数:3
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