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  • Title: The role of high mobility group box 1 (HMGB-1) in the diabetic retinopathy inflammation and apoptosis.
    Author: Yu Y, Yang L, Lv J, Huang X, Yi J, Pei C, Shao Y.
    Journal: Int J Clin Exp Pathol; 2015; 8(6):6807-13. PubMed ID: 26261566.
    Abstract:
    Diabetic Retinopathy (DR) is one of the most common complications of the late phase diabetes, and also a common cause of blindness. High mobility group box 1 (HMGB-1) is considered to be an inflammatory mediator in the late phase that promotes inflammation and neovascularization in diabetes. Therefore, this paper discussed the role of HMGB-1 in diabetic retinopathy inflammation and neovascularization. 96 adult SD rats were randomly divided into control and diabetes group. The diabetic rat model was established by intraperitoneal injection of streptomycin (0.1 mol/L). Western blot was applied to determine HMGB-1 and its receptor RAGE and TLR2 protein expression in the serum. TUNEL was used to detect retinal apoptosis. Immunofluorescence was performed to test HMGB1 protein expression in retina. HBGM-1 and RAGE expression in diabetic rat retina was significantly higher than the control (P < 0.05), while TLR2 expression was lower (P < 0.05). TUNEL detection showed that diabetic rat retinal cells presented obviously higher apoptosis rate (P < 0.05). Immunofluorescence test revealed that HMGB1 largely expressed in the diabetic rat retinal cells (P < 0.05). HMGB1 may involve in the pathogenesis of diabetic retinopathy by binding with RAGE receptor to accelerate rat retinal cells apoptosis.
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