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OBJECTIVE: To observe the effects of ginkgo flavonoids on the generation of hydroxyl radicals in the retina of rabbits with high intraocular pressure (IOP). METHODS: A model of ocular hypertension was established by perfusing physiological saline into anterior chamber. Rabbits were injected intravenously with ginkgo flavonoids (treatment group) and saline (control group) and later salicylate at 70 hours after hypertension, and 2,3-dihydroxybenzoic acid (2,3-DHBA) were identified by high power liquid chromatography and electrochemical and fluorescent detectors (HPLC-ECD). Salicylate was quantitated fluorimetrically. RESULTS: The levels of hydroxyl radicals in rabbit retina were significantly higher than those in the control groups after surgery 72 hours. The levels of hydroxyl radicals in rabbit retina in middle dosage of ginkgo flavonoids groups or above were significantly decreased but in small dosage of ginkgo flavonoids groups were not decreased compared to model groups after treatment with ginkgo fiavonoids. CONCLUSIONS: Ginkgo flavonoids may antagonize hydroxyl radicals damage in rabbit retina with high IOP.LA: Chinese
Dr. Y. Li, Department of Ophthalmology, Tangdu Hospital, Fourth Military Medical University, Xi'an 710038, China
11.8 Neuroprotection (Part of: 11 Medical treatment)