摘要
目的探讨吡咯喹啉醌(PQQ)对N甲基D天冬氨酸(NMDA)诱发海马神经元损伤的影响。方法体外原代培养新生大鼠海马神经元,毒性剂量的NMDA诱致海马神经元损伤,预加PQQ,镜下观察神经元的形态变化,琼脂糖凝胶电泳观察细胞的死亡情况,激光共聚焦显微镜观察细胞内Ca2+浓度的变化。结果体外培养8d的海马神经用0.1mmol/LNMDA处理后,细胞内Ca2+快速增加,细胞以坏死和凋亡两种形式死亡,细胞的存活率降低;预先给予PQQ可明显减少细胞内Ca2+的增加,减少细胞死亡。结论PQQ对NMDA诱发的海马神经元损伤具有保护作用。
Objective To investigate the protective effect of pyrroloquinoline quinone （PQQ） on damage of hippocampal neurons induced by NMDA. Methods Hippocampal neurons were cultured in vitro and NMDA was used to induce neurotoxicity 8 d after, while PQQ were used or not before. The metamorphosis of hippocampal neurons was observed under the microscope. Intracellular calcium levels was measured by confocal laser microscopy. Results The intracellular Ca^2＋ level increased rapidly after exposure to 0.1 mmol/L NMDA and resulted in neuronal necrosis and apoptosis. Otherwise, pretreatment of the cultured neurons with PQQ reduced the increase of the intracellular Ca^2＋ level and the neuronal necrosis or apoptosis induced by NMDA. Conclusion PQQ can protect hippocampal neurons from damage induced by NMDA.
出处
《中国康复理论与实践》
CSCD
2005年第7期509-511,F0003,共4页
Chinese Journal of Rehabilitation Theory and Practice
基金
湖北省教育厅重点项目(No.2003A011)
