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This study aimed to determine the effect of 3',4'-Dihydroxyflavonol (DiOHF) on lipid peroxidation, DNA damage and inflammation in ovarian ischaemia (I)-reperfusion (R) injury. This study was performed on 44 Wistar-albino female rats. Groups were designed as Control; Sham; I/R (the left ovary was ligated for 2 h and then reperfused for 2 h); I/R + DiOHF (after 2 h ischaemia and 2 h reperfusion, 30 mg/kg of DiOHF was given intraperitoneally and reperfusion was allowed for 2 h more); I + DiOHF + R (after 2 h I, 30 mg/kg of DiOHF was given at the beginning of 2 h reperfusion); DiOHF + I/R (2 h after DiOHF administration, the left ovary was ligated for 2 h and then reperfused for 2 h). Blood and ovarian tissue samples were analysed for GSH, MDA, 8-OHdG, SOD, and IL-6. Ovarian tissue was examined histopathologically. Ovarian I/R has led to inflammation and oxidative damage. However, DiOHF activated the antioxidant system and prevented DNA damage induced by I/R in ovarian tissue. Vascularisation, oedema, and inflammation also occurred in ovarian tissue in I/R group. The results of this study indicated that I/R led to disturbance of the oxidant/antioxidant system balance and increased DNA damage; however, DiOHF supplementation prevented DNA damage, lipid peroxidation and inflammation by increasing the antioxidant system in ovarian I/R injury in rats. However, in potential I/R situations, DiOHF application appears to be beneficial in reducing inflammation, oxidant injury, and DNA damage, and in activating the antioxidant system.IMPACT STATEMENTWhat is already known on this subject?  Ischaemia/reperfusion (I/R) injuries lead to damage in cells or tissues due to insufficient blood flow.What do theresults of this study add?  Increased DNA injury and inflammatory response (IL-6) and structural impairment were treated by administration of intraperitoneal  ( DiOHF) which strongly stimulated the antioxidant system, inhibited antioxidant activities, prevented DNA damage and inflammation process.What are the implications of these findings for clinical practice and/or further research?  This study’s strength is that it is the first research demonstrates the prevention of DNA damage in ovarian I/R by DiOHF supplementation. This flavonoid (DiOHF) may be used for treatment in different ovarian ischaemia/reperfusion. What is already known on this subject?  Ischaemia/reperfusion (I/R) injuries lead to damage in cells or tissues due to insufficient blood flow. What do theresults of this study add?  Increased DNA injury and inflammatory response (IL-6) and structural impairment were treated by administration of intraperitoneal  ( DiOHF) which strongly stimulated the antioxidant system, inhibited antioxidant activities, prevented DNA damage and inflammation process. What are the implications of these findings for clinical practice and/or further research?  This study’s strength is that it is the first research demonstrates the prevention of DNA damage in ovarian I/R by DiOHF supplementation. This flavonoid (DiOHF) may be used for treatment in different ovarian ischaemia/reperfusion.

3′,4′-Dihydroxyflavonol (DiOHF) prevents DNA damage, lipid peroxidation and inflammation in ovarian ischaemia-reperfusion injury of rats