低温对大鼠睾丸扭转后睾丸抗氧化能力影响的研究

目的:探讨低温对睾丸扭转后其抗氧化能力的影响。方法:24只健康青春期SD雄性大鼠随机分为3组:A组为睾丸扭转组,B组为睾丸扭转加低温组,C组为对照组,每组8只。建立单侧睾丸扭转模型。术后第14d采集睾丸。化学比色法测定其总抗氧化能力(T-AOC)和丙二醛(MDA)的含量。光镜观察睾丸组织学变化。结果:B组T-AOC明显高于A组(P<0.01),而低于C组(P<0.01);B组MDA含量低于A组(P<0.01),而高于C组(P<0.05)。结论:低温可抑制睾丸扭转复位后氧自由基的产生及其引发的脂质过氧化反应,提高扭转睾丸的生存力。

Effects of Hypothermia on Antioxidant Capacity of Rat Testes after Testicular Torsion

OBJECTIVE: To investigate the effects of hypothermia on the antioxidant capacity of rat testes after testicular torsion. METHODS: Twenty-four healthy pubertal male Sprague-Dawley rats were randomly divided into three groups of equal number: Group A (torsion) , Group B (torsion + hypothermia) and Group C (control). The animals were submitted to unilateral 720 degrees testicular torsion, and underwent detorsion two hours later. Fourteen days later, the total antioxidant capacity (T-AOC) and the level of malonic diethylaldehyde(MDA) were detected with spectrophotometer and histological changes were observed by light microscope. RESULTS: The T-AOC of Group B was significantly greater than that of Group A (P < 0.01), but less than that of Group C (P < 0.01). The MDA level of Group B was lower than that of Group A (P < 0.01), but higher than that of Group C (P < 0.05). CONCLUSION: Hypothermia can restrain the production of oxygen free radicals following testicular torsion/detorsion in rats, which in turn can inhibit lipid peroxidation and increase the survivability of the torsional testis.