Objective To investigate the expression of Nrf2 in epileptic rat model induced by kianic acid and its effect on neuron.Methods Rats were injected kianic acid (1 μg/μl)1.0 μl into hippocampal,and divided randomly into model 24 h (acute model group),model 28 d (chronic model group),sham group were inject equal volume saline,10 for each group.We observed the change of neuron by using Nissl staining;Immunohistochemistry and Western blotting were to measure the expression of Nrf2.Results Compared with sham,the results of Nissl staining suggested that Nissl bodies in nervous cells decreased in model 24 h group and model 28 d group,and especially in model 28 d group;the results of Immunohistochemistry and Western blotting demonstrated that the expression of Nrf2 increased in model 24 h group,decreased in model 28 d group.Conclusion Nrf2 had possible neuroprotective effect in acute kianic acid model and the mechanism was probably related to the upregulation the expression of Nrf2.%目的 探讨海人藻酸致急慢性癫痫模型中Nrf2的变化及其对神经元的影响.方法 大鼠海马内注射浓度为(1 μg/μl)海人藻酸(KA)1.0 μl后,随机分为模型24 h组(急性模型组)及模型28 d组(慢性模型组),假手术组注射等体积的生理盐水,每组10只.尼氏染色法观察神经元的变化;免疫组化及免疫印迹法测定Nrf2的表达.结果 尼氏染色结果显示,与假手术组相比,模型24 h组与模型28 d组尼氏小体均减少,但以模型28 d组减少显著;免疫组化及免疫印迹结果表明,模型24 h组的表达增加,模型28 d组表达则减少.结论 Nrf2在急性模型表达上调,具有抗氧化作用,进而保护神经元;慢性模型中则不具有抗氧化作用,神经元受损.
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