目的:探讨survivin基因在儿童胚胎性横纹肌肉瘤(embryonal rhabdomyosarcoma,ERMS)中的生物学作用。方法:采用survivin免疫组织化学检测ERMS肿瘤组织和正常骨骼肌组织的表达情况,小干扰RNA(siRNA)介导的survivin抑制对ERMS RD细胞凋亡...目的:探讨survivin基因在儿童胚胎性横纹肌肉瘤(embryonal rhabdomyosarcoma,ERMS)中的生物学作用。方法:采用survivin免疫组织化学检测ERMS肿瘤组织和正常骨骼肌组织的表达情况,小干扰RNA(siRNA)介导的survivin抑制对ERMS RD细胞凋亡的影响,原位末端标记法(TUNEL)检测RD细胞凋亡率,Western印迹法检测RD细胞caspase-3和caspase-9蛋白表达水平。结果:Sur vivin在ERMS中高表达而在正常骨骼肌组织中不表达,特异性siRNA干扰sur v iv in表达导致RD细胞凋亡显著增加,survivin表达的下调导致更高的凋亡率,survivin表达的下调增加了caspase-3的活性,对caspase-9的活性无影响。结论:Survivin过表达可能通过抑制细胞凋亡而与ERMS发病机制有关。展开更多
The rabies virus is a neurotropic virus that causes fatal diseases in humans and animals.Although studying the interactions between a single rabies virus and the cell membrane is necessary for understanding the pathog...The rabies virus is a neurotropic virus that causes fatal diseases in humans and animals.Although studying the interactions between a single rabies virus and the cell membrane is necessary for understanding the pathogenesis,the internalization dynamic mechanism of single rabies virus in living cells remains largely elusive.Here,we utilized a novel force tracing technique based on atomic force microscopy(AFM)to record the process of single viral entry into host cell.We revealed that the force of the rabies virus internalization distributed at(65±25)pN,and the time was identified by two peaks with spacings of(237.2±59.1)and(790.3±134.4)ms with the corresponding speed of 0.12 and 0.04µm/s,respectively.Our results provide insight into the effects of viral shape during the endocytosis process.This report will be meaningful for understanding the dynamic mechanism of rabies virus early infection.展开更多
文摘目的:探讨survivin基因在儿童胚胎性横纹肌肉瘤(embryonal rhabdomyosarcoma,ERMS)中的生物学作用。方法:采用survivin免疫组织化学检测ERMS肿瘤组织和正常骨骼肌组织的表达情况,小干扰RNA(siRNA)介导的survivin抑制对ERMS RD细胞凋亡的影响,原位末端标记法(TUNEL)检测RD细胞凋亡率,Western印迹法检测RD细胞caspase-3和caspase-9蛋白表达水平。结果:Sur vivin在ERMS中高表达而在正常骨骼肌组织中不表达,特异性siRNA干扰sur v iv in表达导致RD细胞凋亡显著增加,survivin表达的下调导致更高的凋亡率,survivin表达的下调增加了caspase-3的活性,对caspase-9的活性无影响。结论:Survivin过表达可能通过抑制细胞凋亡而与ERMS发病机制有关。
基金This work was supported by the Project of the Education Department of Jilin Province,China(No.JJKH20220666KJ)the Talent of Jilin Province Development Fund Project,China(No.2021Y004)National Natural Science Foundation of China(No.21773017).
文摘The rabies virus is a neurotropic virus that causes fatal diseases in humans and animals.Although studying the interactions between a single rabies virus and the cell membrane is necessary for understanding the pathogenesis,the internalization dynamic mechanism of single rabies virus in living cells remains largely elusive.Here,we utilized a novel force tracing technique based on atomic force microscopy(AFM)to record the process of single viral entry into host cell.We revealed that the force of the rabies virus internalization distributed at(65±25)pN,and the time was identified by two peaks with spacings of(237.2±59.1)and(790.3±134.4)ms with the corresponding speed of 0.12 and 0.04µm/s,respectively.Our results provide insight into the effects of viral shape during the endocytosis process.This report will be meaningful for understanding the dynamic mechanism of rabies virus early infection.
