畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (1): 138-143.doi: 10.11843/j.issn.0366-6964.2015.01.018

• 基础兽医 • 上一篇    下一篇

拉莫三嗪及L-硝基精氨酸对颞叶癫痫一氧化氮合酶活性、一氧化氮含量及nNOS阳性神经元形态结构的影响

李猛猛,尹逊河*,邱建华,王宪龙,李囡   

  1. (山东农业大学动物科技学院,泰安 271018)
  • 收稿日期:2014-05-23 出版日期:2015-01-23 发布日期:2015-01-23
  • 通讯作者: 尹逊河(1955-),教授,E-mail:xhyin@sdau.edu.cn,xhyin@163.com
  • 作者简介:李猛猛(1988-),女,山东淄博人,硕士,主要从事神经解剖与神经生物学研究,E-mail:limengmengshannong@126.com
  • 基金资助:

    国家自然科学基金项目(30671498);山东省自然科学基金项目(Y2003D04)

The Influence of Lamotrigine and L-NNA on the Content of Nitric Oxide and the Activity Nitric Oxide Synthase and nNOS Positive Neurons Morphology in the Temporal Lobe Epilepsy Rabbit Induced by Pilocarpine

LI Meng-meng,YIN Xun-he*,QIU Jian-hua,WANG Xian-long,LI Nan   

  1. (College of Animal Science and Technology,Shandong Agricultural University,Tai’an 271018,China)
  • Received:2014-05-23 Online:2015-01-23 Published:2015-01-23

摘要:

通过测得家兔颞叶癫痫模型中一氧化氮合酶(NOS)的活性和一氧化氮(NO)的含量,研究L-NNA和拉莫三嗪对其含量变化的影响,探讨NO在颞叶癫痫中的发作机制及这两种药物对脑部神经元的保护作用。选取2.0~2.5 kg健康哈白兔60只,随机分为正常对照组、癫痫模型组、拉莫三嗪治疗组和L-NNA治疗组,应用硝酸还原法测定癫痫发作后不同时间脑组织中海马及颞叶NO的含量及NOS的活性。结果显示:发现模型组脑海马及颞叶内NOS 的活性从6 h开始迅速升高,1 d达到峰值,随后逐渐降低,7 d后基本恢复正常水平,但仍高于其他各组(P<0.05)。L-NNA治疗组和拉莫三嗪治疗组在各时间点极显著或显著低于模型组(P<0.01或P<0.05),L-NNA在6 h~1 d时对NOS的降低程度显著好于拉莫三嗪组(P<0.05)。NO的变化规律与NOS变化规律基本一致且成正相关;利用SABC免疫组化染色检测脑海马内神经性NOS(nNOS)阳性神经元,发现模型组海马内CA3区nNOS阳性神经元密度增加,胞质着色加深,胞体的截面积和突起变小;拉莫三嗪治疗组和L-NNA治疗组的神经元密度有所降低,胞体的截面积和突起长度显著变大(P<0.05)。结果显示:NO参与了颞叶癫痫发作的始动过程,高浓度的NO对神经元有损伤作用;L-NNA和新型治疗药拉莫三嗪能明显抑制癫痫发作后NO的浓度,对脑部神经元有一定的保护作用,从而对癫痫发作有较好的治疗作用。

Abstract:

 By measuring the content of Nitric Oxide and the Activity of Nitric Oxide synthase, this experiment was conducted to study the influence of lamotrigine and L-NNA on the change and investigate the mechanism of the action of NO on the cerebral hemorrhageand the protective effect of those two pharmaceuticals in the temporal lobe epilepsy rabbit induced by pilocarpine.Sixty healthy Haerbin rabbits,2.0-2.5 kg,were divided into the group of physiological saline,the epilepsy model group,and the treatment group of lamotrigine and L-NNA.Nitric Oxide (NO) content and the activity of NOS in the hippocampus and temporal lobe after epilepsy were determined by using nitrate enzyme reduction method.We found that the activity of NOS increased at 6 hours after epilpsy, and increased to the highest at 1 day, then decreased gradually and basically returned to normal level after 7 days,but it was still higher significantly than that of other groups (P<0.05).The level of NOS in two therapy groups between L-NNA and lamotrigine were lower than that in model group at every time extremely notable difference or notable difference (P<0.01 or P<0.05),and the decreasing level of NOS in L-NNA group was lower than that of group of lamotrigine between 6 h to 1 day (P<0.05).The change of the NO content and the activity of NOS were accordant primitively and directly correlation.SABC immunohistochemical method was used to detect the neuronal NOS positive neurons in hippocampus,the density of neuronal NOS positive neurons in hippocampus’ CA3 region increased,and the cytoplasm stained darker, soma-sectional area and the length of tuber became smaller; After the treatment of lamotrigine and L-NNA,the density of neuron decreased,and the soma-sectional area and the length of tuber became significant longer (P<0.05).The results indicate that NO is involved in the initiating process of the temporal lobe seizures,and the high concentration of NO can damage the neurons;L-NNA and the novel therapeutic drug lamotrigine can inhibit the concentration of NO after epilepsy seizures,which have a better therapeutic effect on the epilepsy seizures.

中图分类号: