Abstract [Download PDF] [Read Full Text]
Evidences indicated that oxidative stress damage is an essential pathological process in primary open angle glaucoma.Sulforaphane (SFN) can play an antioxidative stress role to many tissues and cells by activating Nrf2/ARE single pathway.However, whether SFN has a protective role to oxidative stress induced damage of trabecular meshwork cells is still unclear.
This study was to investigate the antioxidant effect of SFN against H2O2-induced oxidative damage in bovine trabecular meshwork cells.
Trabecular cells were isolated from fresh black bovine eyeballs and primarily cultured and passaged.The third generation of cells were incubated to 96-well dish at a density of 1×103/well for 24 hours and divided into 4 groups.The cells were incubated using 100 μl serum-free medium in the blank control group.Oxidative damage models were established by adding 100 μmol/L H2O2 (100 μl) in medium in the H2O2 group.The cells were cultured with the medium containing 10 μmol/L SFN (100 μl) in the SFN group, and 100 μl H2O2at the final concentration of 100 μmol/L was added in the SFN-treated cell medium in the SFN+ H2O2 group.The cell vitality in various groups was assayed by using cell counting kit-8 (CCK-8). The apoptosis rate of the cells was detected by Annexin V-FITC/PI double-staining with flow cytometry.
Cultured cells showed a spindle shape with uniform size, abundant cytoplasm, numberous pigmented particles and big nucleolus.The relative cell vitality reduced to (67.00±1.27)% and (80.00±6.25)% in the H2O2 group and SFN+ H2O2 group in comparison with 100% in the blank control group, and the cell vitality in the SFN+ H2O2 group was lower than that in the SFN group but higher than that in the H2O2 group (both at P<0.01). The mean apoptosis rate was (11.33±0.77)%, (32.31±1.03)%, (10.44±0.68)% and (17.68±0.21)% in the blank control group, H2O2 group, SFN group and SFN+ H2O2 group, respectively, showing a significant difference among the groups (F=539.96, P<0.01), and the apoptosis rate in the SFN+ H2O2 group was significantly lower than that in the H2O2 group but higher than that in the blank control group and SFN group (all at P<0.01).
SFN can improve the antioxidative stress ability of trabecular meshwork cells and alleviate the damage induced by oxidative stress.