To investigate the effect of high glucose (HG) on the production of reactive oxygen species (ROS) in retinal precursor R28 cells.
MethodsR28 cells were incubated with low glucose (5 mM) or HG (25 mM) for two days. Additionally, the cells were co-exposed to 50 µM N-acetyl cysteine or 100 µM L-arginine. Production of nitric oxide (NO), ROS, and superoxide were assessed by Griess assay, DCFH-DA assay, and modified cytochrome c assay, respectively.
ResultsHG increased the production of NO, ROS, and superoxide, which were abolished by antioxidants NAC and L-arginine (a substrate for NO production).
ConclusionsHG increased ROS production in R28 cells. Thus, HG may cause cellular dysfunction and damage by inducing oxidative stress in retinal ganglion cells.