miR-181调控人晶状体上皮细胞凋亡的机制研究

Mechanism research of miR-181 regulating human lens epithelial cell apoptosis

摘要:

目的：探讨miR-181在白内障晶状体组织中的表达情况，及其对人晶状体上皮细胞凋亡的调控机制。

方法：利用Real time q-PCR方法，检测年龄相关性白内障患者晶状体前囊膜和人晶状体上皮细胞凋亡模型中miR-181的表达情况； 利用Lipofectamine 2 000瞬时转染miR-181 mimic和inhibitor调节人晶状体上皮细胞中miR-181的表达，利用Real time q-PCR方法验证转染效率，利用流式细胞仪检测细胞凋亡率的变化。

结果：与对照组相比，年龄相关性白内障患者晶状体前囊膜组和人晶状体上皮细胞凋亡模型组，miR-181的表达显著升高； miR-181 mimic转染组，miR-181的表达显著升高，细胞凋亡率显著升高； miR-181 inhibitor转染组，miR-181的表达显著降低，细胞凋亡率显著降低，差异均有统计学意义(P<0.01)。

结论：miR-181在年龄相关性白内障晶状体组织中呈高表达，miR-181能够促进人晶状体上皮细胞凋亡，从而可能在年龄相关性白内障的发病过程中发挥一定作用，miR-181可能成为白内障非手术治疗的一种新途径，但具体机制有待进一步研究。

Abstract:

AIM: To investigate the expression of miR-181 in the lens tissue of cataract and the regulating mechanism of miR-181 on apoptosis of human lens epithelial cell.

METHODS:Real time q-PCR was used to measure the expression of miR-181 in the anterior lens capsules of age-related cataract and human lens epithelial cell apoptosis model. miR-181 mimic and inhibitor were transfected using Lipofectamine 2 000 to regulate the expression of miR-181, and then Real time q-PCR was used to verify transfection efficiency. Flow cytometry was used to detect the change of cell apoptosis rate.

RESULTS: Compared with control group, the expression of miR-181 was significantly higher in both the anterior lens capsules of age-related cataract and human lens epithelial cell apoptosis model; the relative expression of miR-181 in lens epithelial cells transfected with miR-181 mimic was increased, whereas decreased in cells transfected with miR-181 inhibitor; the apoptosis rate of cells transfected with miR-181 mimic was increased, while reduced in miR-181 inhibitor group. Each result was statistically significant(P<0.01).

CONCLUSION: High expression of miR-181 is detected in anterior lens capsule of age-related cataract. miR-181 might play a certain role in the pathogenesis of cataract via promoting human lens epithelial cell apoptosis. miR-181 probably becomes a new approach for the nonoperative treatment of cataract, but the concrete mechanism still needs to be further studied.