目的观察重组人红细胞生成素(r Hu EPO)对戊四氮(PTZ)点燃的癫痫持续状态(SE)的SD大鼠海马神经元的影响,应用磷脂酰肌醇3激酶(PI3K)抑制剂LY294002,观察X连锁凋亡抑制蛋白(XIAP)的变化情况,进一步探讨r Hu EPO作用的可能机制。方法采用...目的观察重组人红细胞生成素(r Hu EPO)对戊四氮(PTZ)点燃的癫痫持续状态(SE)的SD大鼠海马神经元的影响,应用磷脂酰肌醇3激酶(PI3K)抑制剂LY294002,观察X连锁凋亡抑制蛋白(XIAP)的变化情况,进一步探讨r Hu EPO作用的可能机制。方法采用PTZ点燃大鼠SE模型,将大鼠随机分为正常对照组(生理盐水,NS)、PTZ组(PTZ+NS)、r Hu EPO组(PTZ+r Hu EPO)、LY294002组(PTZ+LY294002+r Hu EPO)、二甲基亚砜(DMSO)对照组(PTZ+DMSO+r Hu EPO),检测大鼠行为学和脑电图(EEG)的改变及苏木精-伊红染色观察海马病理学的改变;免疫组织化学法观察磷酸化蛋白激酶B(p-PKB/p-Akt)、X-连锁凋亡抑制蛋白(XIAP)的表达;反转录多聚酶链反应(RT-PCR)方法检测各组大鼠海马XIAPm RNA的表达,Western blot方法检测各组大鼠海马Akt、p-Akt、XIAP蛋白的表达。结果 PTZ点燃大鼠SE后下调了p-Akt、XIAP的表达;r Hu EPO可以增加p-Akt、XIAP的表达,发挥神经保护作用;加入PI3K抑制剂LY294002,海马p-Akt、XIAP蛋白、XIAPm RNA的表达较r Hu EPO组减少,减弱了r Hu EPO的保护作用。结论从正反两个方面佐证了PI3K/Akt信号通路是r Hu EPO发挥神经保护作用的通路之一,其作用机制可能是r Hu EPO活化PI3K/Akt通路后,对线粒体凋亡途径的相关调控因子XIAP的表达进行了调控,进而介导线粒体凋亡途经,发挥抗凋亡、促存活的神经保护作用。展开更多
With the further development of social economy and the continuous improvement of railway transport service quality, the EMU has gradually replaced the traditional passenger train to become the new generation of main p...With the further development of social economy and the continuous improvement of railway transport service quality, the EMU has gradually replaced the traditional passenger train to become the new generation of main products to shoulder the task of domestic railway passenger transport. This paper is based on the construction of power centralized EMU maintenance base. On the basis of domestic power centralized EMU maintenance base construction and operational management experience, according to the new power centralized EMU running demand, combined with the existing equipment and facilities and other railway use maintenance, analysis and study to strengthen our group power centralized EMU maintenance ability, put forward the overall layout scheme.展开更多
文摘目的观察重组人红细胞生成素(r Hu EPO)对戊四氮(PTZ)点燃的癫痫持续状态(SE)的SD大鼠海马神经元的影响,应用磷脂酰肌醇3激酶(PI3K)抑制剂LY294002,观察X连锁凋亡抑制蛋白(XIAP)的变化情况,进一步探讨r Hu EPO作用的可能机制。方法采用PTZ点燃大鼠SE模型,将大鼠随机分为正常对照组(生理盐水,NS)、PTZ组(PTZ+NS)、r Hu EPO组(PTZ+r Hu EPO)、LY294002组(PTZ+LY294002+r Hu EPO)、二甲基亚砜(DMSO)对照组(PTZ+DMSO+r Hu EPO),检测大鼠行为学和脑电图(EEG)的改变及苏木精-伊红染色观察海马病理学的改变;免疫组织化学法观察磷酸化蛋白激酶B(p-PKB/p-Akt)、X-连锁凋亡抑制蛋白(XIAP)的表达;反转录多聚酶链反应(RT-PCR)方法检测各组大鼠海马XIAPm RNA的表达,Western blot方法检测各组大鼠海马Akt、p-Akt、XIAP蛋白的表达。结果 PTZ点燃大鼠SE后下调了p-Akt、XIAP的表达;r Hu EPO可以增加p-Akt、XIAP的表达,发挥神经保护作用;加入PI3K抑制剂LY294002,海马p-Akt、XIAP蛋白、XIAPm RNA的表达较r Hu EPO组减少,减弱了r Hu EPO的保护作用。结论从正反两个方面佐证了PI3K/Akt信号通路是r Hu EPO发挥神经保护作用的通路之一,其作用机制可能是r Hu EPO活化PI3K/Akt通路后,对线粒体凋亡途径的相关调控因子XIAP的表达进行了调控,进而介导线粒体凋亡途经,发挥抗凋亡、促存活的神经保护作用。
文摘With the further development of social economy and the continuous improvement of railway transport service quality, the EMU has gradually replaced the traditional passenger train to become the new generation of main products to shoulder the task of domestic railway passenger transport. This paper is based on the construction of power centralized EMU maintenance base. On the basis of domestic power centralized EMU maintenance base construction and operational management experience, according to the new power centralized EMU running demand, combined with the existing equipment and facilities and other railway use maintenance, analysis and study to strengthen our group power centralized EMU maintenance ability, put forward the overall layout scheme.
