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神经肽Y对原代大脑皮质神经元NMDA受体电流的影响及其机制探讨

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摘要 目的观察神经肽Y(NPY)对原代大脑皮质神经元N-甲基-D-天冬氨酸(NMDA)受体电流(INMDA)的影响,并探讨其机制。方法取新生24 h内SD大鼠大脑皮质,进行原代神经元及小胶质细胞培养。将原代神经元分为1、2、3、4组,分别与小胶质细胞条件培养液1∶1混合。1、2、3、4组加入的小胶质细胞条件培养液分别为无血清胶质细胞培养液、含LPS的无血清胶质细胞培养液、含NPY+LPS的无血清胶质细胞培养液、含NPY+LPS+NPY Y1受体阻断剂BIBP3226的无血清胶质细胞培养液。混合培养液孵育神经元6 h后,采用标准全膜片钳技术记录各组神经元INMDA峰值电流密度。结果 1、2、3、4组INMDA峰值电流密度分别为(23.19±1.29)、(38.91±3.29)、(27.09±2.58)、(35.56±3.92)Pa/Pf;与1组相比,2组电流密度增强(P<0.05);与2组相比,3组电流密度降低(P<0.05);与3组相比,4组电流密度上升(P<0.05)。结论 NPY可减轻原代培养大脑皮质小胶质细胞对神经元INMDA的影响,避免神经元INMDA过度增高;作用于小胶质细胞NPY Y1受体,可能是其机制之一。
出处 《山东医药》 CAS 北大核心 2015年第28期30-31,共2页 Shandong Medical Journal
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