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褪黑素对大鼠脊髓损伤早期MDA、SOD水平的影响

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摘要 目的:通过观察褪黑素(melatonin,MT)对脊髓损伤早期(12h)大鼠体内超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)水平的影响,探讨褪黑素治疗脊髓损伤的机制。方法:36只成年SD大鼠随机分为3组:脊髓损伤组(A组)、褪黑素治疗组(B组)、假手术组(Sham组),每组12只。A、B两组以改良的Allen's weight drop(WD)法(打击量50gcf)建立脊髓T12水平损伤模型,Sham组仅行椎板切除不损伤脊髓。B组于术后10 min按体重腹腔注射100mg/kg的MT,A组则按体重腹腔注射等体积的无水乙醇(MT的溶剂)。结果:术后12h,血清中MDA含量比较,A、B两组大鼠于术后均出现了严重的下肢神经功能障碍,两组的BBB运动功能评分差异无统计学意义(P>0.05)。结论:MT可抑制大鼠脊髓损伤早期体内脂质过氧化反应,其机制可能为它可保护大鼠体内SOD的活性,间接地抑制脂质过氧化反应;按体重腹腔注射100mg/kg的MT,并不能显著改善大鼠脊髓损伤早期后肢的运动功能障碍。
出处 《中国农村卫生》 2016年第06X期71-72,共2页
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