TNFα转导难治性人颞叶癫痫神经细胞凋亡的研究
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林若庭

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Study on TNFα transduction neurocyte apotosis of refractory human temporal lobe epilepsy
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    摘要:

    目的 研究难治性人颞叶癫痫颞叶组织中是否存在肿瘤坏死因子α(tumor necrosis factor-α,TNFα)转导的神经细胞凋亡并探讨相关分子机制。 方法 免疫组化SP染色法检测难治性人颞叶癫痫组与对照组脑组织神经元、胶质细胞肿瘤坏死因子受体相关死亡结构域蛋白(TNFR-assosiated death domain protein,TRADD)、凋亡信号调节激酶1(apoptosis signal-regulating kinase 1,ASK1)、天冬氨酸特异性半胱氨酸蛋白酶8(caspase8)的表达并分析其表达差异。透射电镜下观察颞叶癫痫灶神经元、胶质细胞超微结构改变。 结果 难治性人颞叶癫痫组神经元caspase8表达较对照组增加(P<0.05),胶质细胞caspase8表达较对照组明显增加(P<0.01);两组神经元与胶质细胞TRADD、ASK1均未见明显阳性表达;透射电镜观察见癫痫组神经元具有细胞体积变小、核固缩、异染色质增多及边缘化、细胞及核膜边缘皱缩不齐、核分裂像、凋亡小体形成等凋亡特征;星形胶质细胞水肿。 结论 难治性颞叶癫痫病人颞叶组织中:神经元及胶质细胞可能存在TNFα转导的细胞凋亡。

    Abstract:

    Objective To study whether TNFα transduction neurocyte apotosis exists in the temporal lobe of refractory human Temple Lobe Epilepsy(TLE)and explore the relative molecule mechanisms. Methods SP dyeing of Immunohistochemistry was used to detect the expression of TNFR-assosiated death domain protein(TRADD)、apoptosis-signal-regulating kinase 1(ASK1)and caspase 8 in neurons and gliocytes of refractory human TLE group and contrast group,and their expression was analyzed. Neurons,gliocytes in the foci of TLE were observed by transmission electron microscope.Results The expression of caspase 8 in neurons of TLE group was increased than that in contrast group(P<0.05). The expression of caspase 8 in gliocytes of TLE group was obviously increased than that in contrast group(P<0.01). The expression of TRADD and ASK1 was not found in neurons and gliocytes of both groups. Under transmission electron microscope,distinctive apotosis changes were found in neurons of TLE group,including the neurons decreasing in volume、nuclear pyknosis、increasing and marginal collection of heterochromatin、shrinkage of cytomembrane and nucleolemma、nuclear division、forming apoptotic bodies. And astrocytes were found swollen.Conclusion In the temporal lobe tissue of refractory human TLE:TNFα transduction cell apotosis may exist in neurons and gliocytes.

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林若庭 蔡若蔚 林元相 张鹏飞456. TNFα转导难治性人颞叶癫痫神经细胞凋亡的研究[J].国际神经病学神经外科学杂志,2009,(5):395-399111222. Study on TNFα transduction neurocyte apotosis of refractory human temporal lobe epilepsy[J]. Journal of International Neurology and Neurosurgery,2009,(5):395-399

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  • 收稿日期:2009-07-11
  • 最后修改日期:2009-09-28
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  • 在线发布日期: 2009-10-28
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