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    Contrary effects of coenzyme Q10 and vitamin E after testicular ischemia/reperfusion in a rat model validated with glucose metabolism imaging
    (Sage Publications Ltd, 2021) Arda, Ersan; Yuksel, Ilkan; Akdere, Hakan; Akdeniz, Esra; Yalta, Tulin D.; Aktoz, Tevfik; Altun, Gulay D.
    Objective: To evaluate the efficacy of antioxidants in cellular-level post-ischemia/reperfusion injury of the testis and to validate these effects with F-18-fluorodeoxyglucose positron emission tomography. Methods: Fifty-six adult male rats were randomly divided into seven groups-Group 1: sham; Group 2: ischemia/reperfusion only group; Group 3: ischemia was induced and vitamin E (100 mg/kg) was administered intraperitoneally 30 min before reperfusion; Group 4: vitamin E was given intraperitoneally without ischemia/reperfusion; Group 5: ischemia was induced and coenzyme Q10 (10 mg/body weight) was administered intraperitoneally 30 min before reperfusion; Group 6: coenzyme Q10 was administered intraperitoneally without ischemia/reperfusion; Group 7: ischemia was induced and coenzyme Q10 + vitamin E was administered intraperitoneally 30 min before reperfusion. After detorsion, fluorodeoxyglucose was applied to all groups according to the animals' weight and fluorodeoxyglucose positron emission tomography was performed after 1 h. In pursuit of imaging, orchiectomy was performed for histopathological and biochemical evaluations. Results: A significant effect of group on catalase, maximum standardized uptake value, and seminiferous tubule diameters (p < 0.005) was observed. According to this, combining ischemia/reperfusion with vitamin E increased the maximum standardized uptake value significantly higher than in all other groups; in addition, catalase was significantly higher than in Groups 4-6. Histopathological outcomes revealed that sham had significantly larger seminiferous tubule diameter than Groups 2-4. Also, ischemia/reperfusion was the only group which had significantly smaller seminiferous tubule diameters than Groups 6 and 7. Conclusion: In contrast to vitamin E, coenzyme Q10 provided remarkable regression of oxidative stress-induced enzymes and revealed consistent effects on histopathological outcomes, which were validated with fluorodeoxyglucose positron emission tomography imaging.
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    Sesamin ameliorates mucosal tissue injury of mesenteric ischemia and reperfusion in an experimental rat model
    (Termedia Publishing House Ltd, 2019) Sayhan, Mustafa B.; Oguz, Serhat; Salt, Omer; Can, Nuray; Ozgurtas, Taner; Yalta, Tulin D.
    Introduction: Mesenteric ischemia/reperfusion (I/R) injury is a serious clinical condition. There were a lot of experimental studies performed in the treatment of I/R injury. To our knowledge, this is the first experimental study with effects of sesamin on I/R injury model. We aimed to investigate the protective effect of sesamin on mesenteric I/R injury model. Material and methods: A total of 32 male Sprague-Dawley rats were divided into four groups. Control group: superior mesenteric artery (SMA) exposed without clamping. I/R group: SMA was clamped for 60 min and then reperfused for 2 h. Sesamin group (S): 30 mg/kg sesamin were given for 5 days, and SMA exposed without clamping. I/R + S group: 30 mg/kg sesamin were given for 5 days, SMA was clamped for 60 min, and then reperfused for 2 h. Plasma and tissue oxidant parameters were investigated as well as histopathological evaluation. Results: Plasma and tissue total antioxidant status (TAS) levels were significantly higher in I/R + S group compared to the rest (p < 0.005). The plasma TAS levels in I/R group was significantly low. The highest tissue TAS levels were detected in I/R + S group. The high levels of plasma and tissue TOS were found in I/R + S group. Plasma and tissue OSI levels were significantly higher in I/R group. Histopathologic evaluation showed that the mean level of intestinal tissue injury score in I/R group was 2.75 and 1.38 in I/R + S group. Conclusions: Sesamin helps to protect the intestinal tissue at the cellular level by reducing the oxidative stress and inflammation at both the plasma and tissue levels in the experimental I/R model.