Mortalin/Hspa9 involvement and therapeutic perspective in Parkinson's disease

By controlling the proper folding of proteins imported into mitochondria and ensuring crosstalk between the reticulum and mitochondria to modulate intra cellular calcium fluxes.Mortalin is a chaperone protein that plays crucial roles in neuronal homeostasis and activity.Howeve r,its expression and stability are strongly modified in response to cellular stresses,in particular upon alte red oxidative conditions during neurodegeneration.Here,we report and discuss the abundant literature that has highlighted its contribution to the pathophysiology of Parkinson's disease,as well as its therapeutic and prognostic potential in this still incurable pathology.

农药鱼藤酮对表达α-突触核蛋白细胞的作用

本研究利用农药鱼藤酮作用于神经细胞 ,观察鱼藤酮对神经细胞的损伤作用以及线粒体功能障碍与α synuclein积聚之间的关系。方法 :本实验选用人神经母细胞瘤细胞株SH SY5Y ,实验组为α synuclein GFP基因转染的细胞 ,鱼藤酮处理的转基因细胞和非转基因细胞 ,对照组为未处理的SH SY5Y细胞。通过RT PCR检测α synuclein基因转染细胞的基因表达情况。荧光显微镜观察细胞内α synuclein GFP表达产物绿色荧光蛋白。MTT法检测各组细胞活性。DCF检测细胞氧应激。HE染色、免疫组化检测α synuclein在细胞中的状态。电镜观察细胞超微结构的改变。结果 :RT PCR显示转基因细胞α synuclein基因的表达。荧光显微镜观察显示细胞浆内可见绿色荧光蛋白 ,绿色荧光分布不均匀 ,可见蛋白积聚。MTT检测结果显示 ,与对照组相比 ,鱼藤酮处理的细胞增殖速度明显减小 (P <0 0 1 )。鱼藤酮的浓度为 75nmol L、1 0 0nmol L时 ,未转基因与转基因的细胞活性相比较 ,前者的细胞活性低于后者 (P <0 0 5 )。HE染色 ,鱼藤酮处理的转基因细胞胞浆减少、转基因细胞胞浆内也可见自噬体。胞浆内有嗜酸性包涵体样结构。免疫组化可见鱼藤酮处理高表达α synuclein细胞明显变成梭形并有很长的突起。电镜显示鱼藤酮处理的细胞线粒体肿胀 。