The Apoptosis of Bovine Lens Epithelial Cells Induced by Proteasome Inhibitor MG132

Author: XING XING ¹ ; HU YIZHEN ; CAO YANG ; XU ZHIRONG
Author Information

1. Department of Ophthalmology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
Keywords: proteasome inhibitor; lens epithelial cells; cataract; apoptosis
From: Journal of Huazhong University of Science and Technology (Medical Sciences) 2008;28(4):469-471
CountryChina
Language:Chinese
Abstract: To investigate the effect of proteasome inhibitor MG132 on the apoptosis of bovine lens epithelial cells (BLECs), the cells were treated with MG132 at different concentrations for12, 24 and 36 h. The cell viability was analyzed by MTT assay and the effect of MG132 on the apoptosis of BLECs was assessed by flow cytometry (FCM). The results showed that after treatment for the same period, the inhibitory effect of MG132 on BLECs proliferation was enhanced with the increment of the concentration of MG132 (0, 2, 5, 10, μmol/L) (P＜0.05). The 50% inhibiting concentration (IC50)was 2.03 μmol/L when the BLECs were treated with MG132 for 36 h. MG132 also induced the apoptosis of BLECs obviously. FCM showed that the apoptosis index of the cells treated by MG132 at 2μmol/L for 12 h was (20.24±1.51)%, and that of the control was (0.98±0.20)% respectively(P＜0.01, n=3). It was concluded that MG132 could lead to apoptosis of BLECs. The decrease of proteasome activity may play an important role in the formation and development of cataract.