This study evaluated the therapeutic efficacy of heparin and methylprednisolone in the treatment of ischaemic reperfusion (IR) injury of the testis. Twenty-four male Sprague-Dawley rats were allocated equally into three groups of eight animals each. The left testes were rotated 720° for 2 h in the rats in the torsion-detorsion group. Rats in the treatment groups underwent the same surgical procedure as the torsion-detorsion group but were also given methylprednisolone (group II) or heparin (group III) by an intraperitoneal route 30 min prior to detorsion. Left orchiectomy was performed in all rats from each experimental animal at 2 h after detorsion, and the tissue was harvested for the measurement of malondialdehyde (MDA), protein carbonyl (PC) and nitric oxide (NO) and the endogenous antioxidant enzymes, superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase. Additional tissue was evaluated using histopathological and immunohistochemical changes. PC and MDA levels were significantly reduced in the treated groups compared to the control group. There was no statistically significant difference in NO level or SOD, GSH-Px and catalase activity among the treatment groups. Histopathological and immunohistochemical findings supported biochemical changes. It is concluded that pre-treatment with methylprednisolone or heparin protects the testis in ischaemic reperfusion injury caused by testicular torsion-detorsion.
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