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Comparison of the effects of bevacizumab and ranibizumab injection on corneal angiogenesis in an alkali burn induced model

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International Journal of Ophthalmology(English edition) 2012年第4期5卷 448-451页

作者： Ayhan dursun Mustafa Kemal Arici feyza dursun Ayse Vural Ozec Mustafa Ilker Toker Haydar Erdogan Aysen Topalkara Department of Ophthalmology School of MedicineCumhuriyet UniversitySivasTurkey

·AIM:To investigate the effects of bevacizumab and ranibizumab on corneal neovascularization in an alkali burn-induced model of corneal angiogenesis. ·METHODS:Fifteen Wistar-Albino rats were divided randomly into 3 groups after chemical cauterization of the cornea. The first group received a single dose of 0.1mL saline solution as a control group whereas second and third groups received a single dose of 2.5mg bevacizumab or 1mg ranibizumab by subconjunctival injection, respectively. After three weeks, the rat corneas were evaluated by biomicroscopy and corneal photographs were taken. The percentage of neovascularization area, length of the longest new vessel, corneal oedema and corneal opacity scores were assessed. ·RESULTS:The analysis of digital photographs showed that the percentage of neovascularization area to the total corneal area, the length of the longest new vessel, corneal oedema and opacity scores were significantly lower in both study groups compared to the control group (P <0.05). Additionally, the percentage of corneal neovascularization area, the length of the longest new vessel and corneal opacity score were less with bevacizumab than ranibizumab. ·CONCLUSION:Subconjunctival bevacizumab and ranibizumab treatments may be effective methods in reducing corneal neovascularization. Furthermore, bevacizumab is more effective than ranibizumab in the inhibition of corneal neovascularization.

关键词： corneal neovascularisation bevacizumab ranibizumab

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Total oxidative stress, paraoxonase and arylesterase levels at patients with pseudoexfoliation syndrome and pseudoexfoliative glaucoma

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International Journal of Ophthalmology(English edition) 2015年第5期8卷 985-990页

作者： feyza dursun Ayse Vural Ozec Huseyin Aydin Aysen Topalkara Ayhan dursun Mustafa Ilker Toker Haydar Erdogan Mustafa Kemal Arici Department of Ophthalmology Cumhuriyet University School of Medicine Department of Biochemistry Cumhuriyet University School of Medicine

AIMTo investigate the oxidative stress status of the aqueous humor and serum of patients with pseudoexfoliation (PEX) syndrome and pseudoexfoliative glaucoma (PEG) and to measure paraoxonase (PON) and arylesterase (ARE) *** total of 78 patients were enrolled in the study, with 26 patients in each separate group. The patients were divided into three groups: the first group entailed PEX syndrome patients, while the second group consisted of patients with PEG and the third group involved patients with no additional systemic diseases, other than the diagnosis of cataract as control. Total oxidative stress (TOS), total antioxidant capacity (TAC), PON, and ARE levels in aqueous humor and serum were ***, PON and arylesterase levels in aqueous humor and serum of the PEX syndrome and PEG patients were significantly decreased compared with control group (P<0.05). TOS values were higher in patients with PEX syndrome and PEG than controls (P<0.05). TAC, PON and ARE levels of aqueous humor did not differ significantly between the PEX syndrome and PEG groupsCONCLUSIONThese findings are potentially of significance and add to the growing body of evidence for oxidative stress in PEX syndrome and PEG. Decreased antioxidant defense and increased oxidative stress system may play an important role in the pathogenesis of PEX syndrome and PEG.

关键词： pseudoexfoliation syndrome oxidative stress paraoxonase arylesterase

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