VEGFA and diabetes mellitus: The number of VEGF-positive cells in the retinas was 7.70±0.62/section in the control group, 21.48±1.56/section in the STZ-induced diabetes group, 11.09±0.99/section in the STZ-induced diabetes and 250 mg/kg betaine-treated group and 12.75±1.79/section in the STZ-induced diabetes and 500 mg/kg betaine-treated group.