Abstract

目的 研究水通道蛋白-1(AQP-1)在糖尿病性白内障发病机制中的作用.方法 从健康的供体眼中分离出人晶状体囊膜,用组织块培养法将人晶状体囊膜分别置于1g/L葡萄糖+体积分数15%胎牛血清的DMEM培养液中(对照组)或4.5g/L葡萄糖+15%胎牛血清的DMEM培养液中进行培养(高糖组).培养3d、28d后观察2组人晶状体上皮细胞(LECs)的生长状态.采用免疫荧光技术和流式细胞术检测AQP-1在人LECs中表达的平均荧光强度,应用流式细胞术检测2组人LECs的凋亡和坏死情况,并进行比较.结果 培养第3天2组LECs的生长形态近似,但培养28d高糖组坏死细胞增加.培养3d后高糖组人LECs的AQP-1免疫荧光表达较对照组明显增强,2组间平均荧光强度的差异有统计学意义(t=3.934,P=0.004),但2组间LECs的凋亡率和坏死率差异均无统计学意义(t=1.681,P=0.131;t=1.064,P=0.318).培养28d后高糖组人LECs的AQP-1免疫荧光表达较对照组弱,差异有统计学意义(t=3.069,P=0.015),LECs凋亡率、坏死率较对照组升高,差异均有统计学意义(t=11.213,P<0.01;t=15.778,P<0.01).结论 AQP-1的异常表达在糖尿病性白内障的发生发展中起重要作用。

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