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This study was designed to investigate the protective effect of hypothermia and vitamin E on spermatogenic function after reduction of testicular torsion in rats. Ninety-six pure inbred male SD rats were divided into group A, B, C and D according to the principle of body weight and birth similarity, with 24 rats in each group. Four groups of rats were respectively twisted on the left testis to establish unilateral testicular torsion rats. Rats in groups A, B, C, D were respectively given normal saline, hypothermia therapy, vitamin E therapy, and hypothermia and vitamin E therapy. The superoxide dismutase (SOD) activity and malondialdehyde (MDA) content of the four groups were detected, and the correlation levels of inflammatory factors IL-1β, hs-CRP and related sex hormones luteinizing hormone (LH), follicle-stimulating hormone (FSH), total testosterone (T) were detected by ELISA. Apoptosis of spermatogenic cells of testis in the four groups was detected by flow cytometry. SOD activity and MDA content in groups B, C and D were significantly higher than those in group A, MDA content was significantly lower than that in group A (P&lt;0.05), SOD activity in group D was higher than that in groups B and C, while MDA content was lower than that in groups B and C (P&lt;0.05). The levels of IL-1β and hs-CRP in group A were much higher than those in groups B, C and D (P&lt;0.05). LH and FSH levels in group A were significantly higher than those in groups B, C and D (P&lt;0.05), and in group D were significantly lower than those in groups B and C (P&lt;0.05). Apoptosis rate of spermatogenic cells in group A was significantly higher than that in groups B, C and D (P&lt;0.05). Hypothermia combined with vitamin E can reverse testicular injury in rats and reduce the apoptosis rate of spermatogenic cells.

Protective effect of hypothermia and vitamin E on spermatogenic function after reduction of testicular torsion in rats