促红细胞生成素对大鼠实验性视网膜脱离细胞凋亡的干预作用

目的探讨促红细胞生成素(erythropoietin,EPO)对实验性视网膜脱离大鼠细胞凋亡的干预作用。方法选用SD大鼠44只,随机分为正常对照组(4只)、生理盐水(normal saliue,NS)对照组20只和EPO治疗组(20只)。正常对照组不做任何处理,其他两组大鼠建立孔源性视网膜脱离模型。造模前4hEPO治疗组大鼠腹腔中注射EPO,NS对照组注射生理盐水。术后1h、6h、12h、24h、72h处死大鼠,每个时间点各取4只,摘取眼球,TUNEL染色,计算内核层、节细胞层及外核层细胞数,进行统计学分析。结果正常对照组大鼠视网膜层次结构清晰,各层排列整齐。NS对照组在脱离后12h连续层状结构紊乱,外节丢失增多,而EPO治疗组的连续层状结构存在,外节变性较轻。TUNEL染色结果显示EPO治疗组在视网膜脱离后1h、12h、24h、72h节细胞层及内核层凋亡细胞数分别为(4.75±1.42)/目、(7.17±1.27)/目、(9.41±1.08)/目、(11.83±1.11)/目]少于NS对照组(7.83±1.70)/目、(9.67±1.56)/目、(12.42±1.31)/目、(15.25±1.22)/目,差异有统计学意义(均为P<0.001)。而外核层EPO治疗组在视网膜脱离后12h、24h、72h的凋亡细胞数分别为(33.08±8.64)/mm2、(49.17±12.52)/mm2、(92.83±14.14)/mm2]少于NS对照组,差异有统计学意义(均为P<0.05),余时段2组间比较差异均无统计学意义。结论通过腹腔注射EPO能减少实验性视网膜脱离所致视网膜各层细胞的凋亡。

Interferential effect of erythropoietin on cell apoptosis in rat experimental retinal detachment

Objective To study the interferential effect of erythropoietin(EPO) on cell apoptosis in rat experimental retinal detachment(RD).Methods Forty-four SD rats were chosen and divided into 3 groups:normal control group(4 cases),EPO treated group(20 cases) and normal saline(NS) control group(20 cases).No any treatment was performed in normal control group,the animal RD model was established in EPO treated group and NS control group.EPO or NS was injected into peritoneal cavity at 4 hours before experimental RD m...