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Ovarian torsion is one of the most dangerous gynecological emergencies requiring surgery. A total of 50%–90% ovarian torsion cases are caused by physiological cysts, endometriosis, and other benign or malignant ovarian neoplasms. The aim of the study was to investigate the effects of erythropoietin (EPO) treatment on ischemia/reperfusion (IR) injury caused by ovarian torsion/detorsion (T/D) injury. Thirty female Wistar albino rats were divided into five groups as follows: Group I: Control; Group II: Torsion (T); Group III: Torsion/Detorsion(T/D); Group IV: Torsion/Detorsion (T/D) + EPO; Group V: EPO. Sections of the ovaries were evaluated for histopathological changes with hematoxylin and eosin stain, a immunohistochemical assay for caspase 3 expression, and the TUNEL assay for apoptosis. Ovarian sections from torsion/detorsion and torsion groups showed more hemorrhage, vascular congestion, edema, degenerative granulosa, and stromal cells. Fewer histopathological changes were found in EPO and T/D + EPO groups. Caspase 3 and TUNEL positive cells were significantly increased in the torsion/detorsion group as compared with the other groups ( p  &lt; 0.05). Treatment with erythropoietin decreased the number of caspase 3 and TUNEL positive cells. The results of the study showed that erythropoietin administration is effective for recovery from degenerative changes in the ovary induced by the torsion-detorsion injury.

The protective effect of erythropoietin on ischemia- reperfusion injury caused by ovarian torsion-detorsion in the experimental rat model