沉默lncRNA PVT1对鼻咽癌细胞C666-1增殖、侵袭转移的影响

摘要

Objective To explore the effects of down-regulated PVT1 on the proliferation,migration and invasion of nasopharyngeal cancer(NPC)C666-1 cells. Methods Expression of PVT1 in NPC cell lines was de-tected by real-time RT-PCR. The effects of PVT1 silencing on cell proliferation were detected using MTT assay. Transwell assay was performed to assess the effect of down-regulated PVT1 on C666-1 cells migration and invasion. Protein level of N-cadherin,Vimentin and E-cadherin were determined by qRT-PCR and Western blot. Results Expression of PVT1 was significantly increased in seven NPC cell lines. Expression of PVT1 was reduced compared to the control group after the siPVT1 transfection. C666-1 cell proliferation was inhibited as compared with siNC group after transfection. The number of migration and invasion cells were significantly reduced while down-regulat-ed PVT1 expression. E-cadherin expression was upregulated while N-cadherin and Vimentinafter was downregulat-ed after PVT1 silencing. Conclusions Downregulation of PVT1 in C666-1 cells via siPVT1 transfection can inhib-it cell growth,migration and invasion,as well as reverse epithelial-mesenchymal transition. PVT1 may serve as a biomarker or even a therapeutic target for NPC.%目的 探讨下调长链非编码RNA PVT1(lncRNA PVT1)对鼻咽癌细胞增殖、侵袭转移的影响.方法 采用荧光定量PCR的方法检测PVT1在鼻咽癌细胞中的表达;通过四甲基偶氮唑蓝(MTT)法分析转染siPVT1后对鼻咽癌C666-1细胞生长的影响;用Transwell法评估沉默PVT1对C666-1细胞迁移和侵袭能力的影响;荧光定量RT-PCR和Western blot检测上皮间质转化相关蛋白(E-cadherin、N-cadherin和Vimentin)表达.结果 PVT1在鼻咽癌细胞中的表达显著升高;下调鼻咽癌细胞C666-1中PVT1表达可抑制细胞生长、迁移和侵袭;并且抑制N-cadherin和Vimentin的表达,升高E-cadherin的表达.结论 下调ln-cRNA PVT1可以抑制鼻咽癌细胞的生长、迁移和侵袭,逆转鼻咽癌细胞上皮间质转化,提示其可作为鼻咽癌治疗的一个潜在靶点.