共 7 条
不同损伤模型内源性BDNF在背根节和损伤脊髓中的表达及其作用
被引:4
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张建一
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中南大学湘雅医学院人体解剖学与神经生物学系 中南大学湘雅医学院人体解剖学与神经生物学系

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罗学港
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中南大学湘雅医学院人体解剖学与神经生物学系 中南大学湘雅医学院人体解剖学与神经生物学系

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机构:
[1] 中南大学湘雅医学院人体解剖学与神经生物学系
[2] Department of Human Physiology,Flinders University
[3] 第四军医大学神经科学研究所
来源:
基金:
澳大利亚国家健康与医学研究理事会;
关键词:
BDNF;
脊髓损伤;
再生;
背根节;
D O I:
暂无
中图分类号:
R363 [病理生理学];
学科分类号:
100103 [病原生物学];
摘要:
目的:探讨不同损伤模型中脑源性神经营养因子(Brain-derived neurotrophin,BDNF)在背根节(dorsal root ganglion,DRG)和损伤脊髓的表达及作用。方法:建立单纯坐骨神经损伤模型、单纯脊髓背索损伤模型以及合并损伤(坐骨神经损伤1周后再损伤脊髓背索)模型,用免疫荧光组织化学方法和酶联免疫吸附实验(ELISA)方法观察不同模型中BDNF在DRG和损伤脊髓的表达,从脊髓损伤处嘴侧5mm处注入快蓝(Fast Blue,FB)以逆行标记DRG中感觉神经元,并结合FB逆行示踪观察FB阳性神经元BDNF的表达情况。结果:坐骨神经损伤1周后损伤侧的腰4、5背根节中BDNF蛋白表达上调。与单纯脊髓损伤组相比,合并损伤组在脊髓损伤的尾侧端可见较多的BDNF阳性纤维,这些纤维呈膨体样结构,主要分布于坐骨神经损伤侧脊髓尾侧端的白质里,合并损伤组FB标记的感觉神经元数目也较单纯脊髓损伤组多,且大部分FB标记的感觉神经元是BDNF阳性的神经元。结论:坐骨神经损伤后内源性的BDNF在DRG和损伤脊髓中表达上调,可能参与坐骨神经损伤引起的脊髓损伤后再生过程。
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页码:80 / 84+89
+89
页数:6
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