Protective effects of betaine-homocysteine methyl transferase on oxidative damaged human lens epithelial cells induced by high homocysteine

Abstract

AIM: To discuss the protective effects of betaine-homocysteine methyl transferase(BHMT)on oxidative damaged human lens epithelial cells(HLEC)induced by homocysteine.METHODS: HLEC were cultured in vitro and then randomly divided into 3 groups. Normal group:normal cultured HLEC; control group: normal cultured HLEC transfected with empty vector; BHMT gene overexpression group(OE): HLEC transfected with BHMT gene overexpression. All groups were cultured in 10% FCS DMEM +5mmol/L Hcy for 16h. After cultured, BHMT mRNA expression was measured by qRT-PCR and Western blot, the cell proliferation was detected by EdU Assay Kit,The level of ROS and GSH of HLEC were measured by Flow Cytometer and Visible Spectrophotometers. The expression level of of protein(GRP78, Nrf2, Caspase-12)was measured by western blotting. RESULTS: After cultured 16h, cell proliferation ability in OE group was increased by 30.0% compared with NC group(PPPCONCLUSION: BHMT in vitro can prevent the oxidative damage of HLEC by high homocysteine, clear the ROS and decrease the ER stress reaction. Apoptosis of lens epithelial cells was inhibited. BHMT plays an important protective role in oxidative damaged HLEC induced by Hcy.

Keywords

• betaine-homocysteine methyltransferase
• Hcy
• human lens epithelial cells
• oxidative damage
• cell apoptosis