Abstract
Retinopathy remains an important complication of diabetes. This work was carried out to evaluate the protective effects of genistein from diabetic retinopathy in rat. Fifteen adult male albino rats were divided into two groups; Group I: control (n = 5) and Group II: streptozotocin induced diabetic group (n = 10), which is equally divided into two subgroups; IIa (diabetic vehicle control) and IIb (diabetic genistein-treated). Specimens were taken from the retina 12 weeks post induction, processed and examined using light, immunohistochemical, ultrastructural techniques. Blood samples were assayed for the levels of glucose. In comparison with the diabetic non-treated group, the histological changes in macro and microglial glial cells reactivity and retinal blood capillaries were improved in genistein-treated groups. In addition, GFAP and iNOS expressions in the retina and the blood glucose level were reduced. Genistein ameliorates the histological changes of diabetic retinopathy reaching healing features, which resemble that of a normal retina.
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