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    Evaluation of Rheum ribes L. Protective Effect with G Protein-Coupled Estrogen Receptor-1 (GPER-1) Levels in Experimental Liver Ischemia-Reperfusion Model
    (2023) Yağmur, Işıl; Kurutas, Ergul Belge; Yuzbasioglu, Mehmet Fatih; Bakaris, Sevgi; Çitil, Büşra; Doğaner, Adem; Tural, Rabia
    Objective: To evaluate the relationship between the cell protective effects of Rheum ribes L. and G protein-coupled estrogen receptor-1 (GPER-1) levels in ischemia-reperfusion (I/R) injury. Material and Method: The 32 male Wistar-Albino rats we used in this study were randomly divided into 4 groups of 8 rats each; control group (group 1), sham group (group 2), I/R group (group 3), I/R+Rheum ribes L. group (group 4). While no procedure was applied to the control group, 30 minutes of ischemia followed by 30 minutes of reperfusion was applied to the rats in all other groups. GPER-1 levels in liver tissue were measured with an ELISA reader. Histopathological examination of the tissues was performed under light microscopy. Results: As a result of biochemical analysis; GPER-1 levels were statistically significantly decreased in the sham and I/R groups compared to control and I/R+Rheum ribes L. groups; in the I/R+Rheum ribes L. group compared to the control group (p <0.05). In the histopathological examination of the liver, necrosis and congestion observed in the Sham and I/R groups were significant when compared to the control group. While vacuolization was observed in a few experimental animals, there was a significant difference in the sham and I/R groups compared to the control group (p ˂0.05). I/R+Rheum ribes L. group showed improvement in histopathological criteria in terms of vacuolization and necrosis compared to the sham group and I/R groups, and the difference was significant. (p ˂0.05). Conclusion: Rheum ribes L. can protect hepatocytes both with its antioxidant effects and GPER-1 activation.
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    Öğe
    Protective effect of Asphodelus aestivus Brot. on bladder injury due to ischemia-reperfusion: Biochemical and histopathological Study
    (Natl Inst Science Communication-Niscair, 2025) Kopar, Hatice; Yagmur, Isil; Kurutas, Ergul Belge; Tural, Rabia
    Severe oxidative stress caused by reperfusion after ischemia in the bladder causes serious functional and structural damage. New molecules with antioxidant effects are needed to protect against this damage. In our study, we aimed to investigate the effect of Asphodelus aestivus on the oxidant-antioxidant system in bladder ischemia/reperfusion (I/R) injury induced in rats biochemically and histopathologically. In our study, 24 three-month-old male Wistar-Albino rats weighing 250-300 g were randomly divided into 3 groups of 8 rats each: sham group (I/R+serum physiological, 1mL) (group 1), I/R group (group 2), I/R+A. aestivus group (50 mg/kg/day) (treatment group, group 3). At the end of the experiment, all rats were sacrificed and their bladder tissues were taken and divided into 2 parts for biochemical and histopathological examination. Protein amount, malondialdehyde (MDA) levels and superoxide dismutase (SOD) and catalase (CAT) enzyme activity levels were measured spectrophotometrically, and histopathological examination was performed under a light microscope. MDA levels were significantly higher and CAT activity was significantly lower in the I/R group compared to the sham and treatment groups (P<0.05). In histopathological examination, it was determined that there was a significant regression and/or decrease in the findings caused by I/R injury in the group treated with A. aestivus. A. aestivus has a protective effect in reducing oxidative stress in bladder I/R injury.