Person: TUĞCU, BETÜL
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Publication Open Access Protective effect of pomegranate juice on retinal oxidative stress in streptozotocin-induced diabetic rats.(2017-11-18) Tugcu, BETÜL; NACAROGLU, SA; GEDIKBASI, A; UHRI, M; ACAR, N; ÖZDEMIR, HÜSEYİN; TUĞCU, BETÜL; ÖZDEMİR, MEHMET HAKANAim: To investigate the effect of pomegranate juice (PJ) intake on overall oxidation status in retinas of diabetic rats. Methods: Twenty-seven rats were divided into four groups as control (CO), diabetic (DM), control treated with PJ (CO-PJ), and diabetic treated with PJ (DM-PJ).The retina tissues were used to determine 8-hydroxy-2'-deoxyguanosine (8OHdG), malondialdehyde (MDA), reduced glutathione (GSH) levels, and the enzyme activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px). Results: The levels of 8OHdG and MDA were significantly increased in the retina of DM group compared to CO group (P=0.001, P<0.001 respectively). Both 8OHdG and MDA levels were decreased in PJ-DM group compared to DM group (P=0.004, P<0.001 respectively). The activities of antioxidant enzymes GSH, SOD, and GDH-Px were significantly decreased in the retina of DM group compared to CO group (P≤0.01). GSH and GSH-Px activities were higher in PJ-DM group compared with DM group (P=0.010, P=0.042, respectively) but SOD activity was not statistically different (P=0.938). Conclusion: PJ intake is found to be effective in decreasing oxidative end products, and in increasing the activities of antioxidant enzymes in diabetic retinas of rats, which suggests it may be effective against oxidative stress in diabetic retinas.Publication Open Access Imaging Methods in the Diagnosis of Optic Disc Drusen.(2016-10-01) Tuğcu, BETÜL; Özdemir, HÜSEYİN; TUĞCU, BETÜL; ÖZDEMİR, MEHMET HAKANOptic disc drusen (ODD) are benign congenital anomalies of the optic nerve characterized by calcified hyaline bodies. While superficial drusen can be diagnosed easily during fundus examination, detecting buried drusen requires the use of additional imaging methods such as B-scan ultrasonography (USG), fundus fluorescein angiography (FFA), computed tomography (CT) and fundus autofluorescence (FAF). ODD can be detected by USG with the presentation of highly reflective round structures. ODD appear as hyperautofluorescent areas on FAF and bright spots on CT scans. FFA can be helpful in differentiating ODD from true optic disc edema. Optic disc edema shows early hyperfluorescence due to diffuse leakage whereas ODD presents as well-defined hyperfluorescence in the late phase. In recent years, it has been reported that optical coherence tomography (OCT) examination has allowed more detailed evaluation of ODD and yielded useful findings for the differentiation of optic disc edema from ODD. In this review, the role of OCT in the diagnosis of ODD is discussed.Publication Open Access Angioid streaks in a case of Camurati-Engelmann disease.(2017-07-01) ÖZDEMIR, HÜSEYİN; Tugcu, BETÜL; SEZER, TAHA; ELBAY, AHMET; TUĞCU, BETÜL; SEZER, TAHA; ELBAY, AHMET; ÖZDEMİR, MEHMET HAKAN