目的探讨癌基因△Np63对膀胱癌细胞增殖和凋亡的影响,并初步探讨其可能的分子机制。方法通过将△Np63特异性短发夹RNA(△Np63-shRNA)和非特异性短发夹RNA(Control-shRNA)转染膀胱移行细胞癌(transitional cell carcinom a of bladder,TC...目的探讨癌基因△Np63对膀胱癌细胞增殖和凋亡的影响,并初步探讨其可能的分子机制。方法通过将△Np63特异性短发夹RNA(△Np63-shRNA)和非特异性短发夹RNA(Control-shRNA)转染膀胱移行细胞癌(transitional cell carcinom a of bladder,TCCB)5637细胞,用半定量逆转录-聚合酶链反应(RT-PCR)和Westernblot分别检测△Np63、p27kip1、p57kip2mRNA和蛋白的表达水平,WST-1法检测细胞增殖活性,利用流式细胞术(FCM)检测细胞周期分布,TUNEL法检测细胞凋亡情况。结果特异性的△Np63-shRNA能够有效地沉默△Np63并上调p27kip1和p57kip2的基因和蛋白水平,转染△Np63-shRNA的5637细胞的增殖能力明显受到抑制(P<0.05),且明显促进了细胞的凋亡(P<0.05)。结论靶向△Np63基因的shRNA片段可以有效的抑制人膀胱癌5637细胞的增殖并促进其凋亡,其可能的机制是通过上调p27kip1和p57kip2的表达实现的。展开更多
Some researchs have demonstrated that the loss of delta Np63 is associated with aggressive phenotypes and poor prognosis. However, other research indicates that delta Np63 is considered to have oncogenic properties. D...Some researchs have demonstrated that the loss of delta Np63 is associated with aggressive phenotypes and poor prognosis. However, other research indicates that delta Np63 is considered to have oncogenic properties. Delta Np63 overexpression is often observed in association with the oncogenic growth of squamous cell carcinomas and bladder cancer. In this study, we investigated the oncogenic role of delta Np63 in regulating cell adhesion in transitional cell carcinoma of the bladder （TCCB）. The cells were stably transfected with the delta Np63 short hairpin RNA （shRNA） plasmid. Immunocytochemistry was performed to determine the knockdown efficiency. Tumour cells were studied for their ability to adhere to vascular endothelial cells. Confocal microscopy was used to analyse the changes in cytoskeletal F-actin. F-actin expression was measured by flow cytometry. Cell invasion ability was assessed using transwell chambers. The delta Np63-silenced tumour cells were shown to adhere more tightly than controls to vascular endothelial cells （P〈0.05）. The content of F-actin in the delta Np63-silenced cells was enhanced （P〈0.05）. The Matrigel invasion assays showed that human 5637 bladder cancer cells had a lower degree of motility when transfected with pdelta Np63-shRNA （P〈0.05）. In conclusion, silencing of the delta Np63 expression can enhance the adhesiveness of 5637 cells by inducing F-actin cytoskeleton production, and it will possibly inhibit the TCCB invasion and metastasis.展开更多
文摘目的探讨癌基因△Np63对膀胱癌细胞增殖和凋亡的影响,并初步探讨其可能的分子机制。方法通过将△Np63特异性短发夹RNA(△Np63-shRNA)和非特异性短发夹RNA(Control-shRNA)转染膀胱移行细胞癌(transitional cell carcinom a of bladder,TCCB)5637细胞,用半定量逆转录-聚合酶链反应(RT-PCR)和Westernblot分别检测△Np63、p27kip1、p57kip2mRNA和蛋白的表达水平,WST-1法检测细胞增殖活性,利用流式细胞术(FCM)检测细胞周期分布,TUNEL法检测细胞凋亡情况。结果特异性的△Np63-shRNA能够有效地沉默△Np63并上调p27kip1和p57kip2的基因和蛋白水平,转染△Np63-shRNA的5637细胞的增殖能力明显受到抑制(P<0.05),且明显促进了细胞的凋亡(P<0.05)。结论靶向△Np63基因的shRNA片段可以有效的抑制人膀胱癌5637细胞的增殖并促进其凋亡,其可能的机制是通过上调p27kip1和p57kip2的表达实现的。
文摘Some researchs have demonstrated that the loss of delta Np63 is associated with aggressive phenotypes and poor prognosis. However, other research indicates that delta Np63 is considered to have oncogenic properties. Delta Np63 overexpression is often observed in association with the oncogenic growth of squamous cell carcinomas and bladder cancer. In this study, we investigated the oncogenic role of delta Np63 in regulating cell adhesion in transitional cell carcinoma of the bladder （TCCB）. The cells were stably transfected with the delta Np63 short hairpin RNA （shRNA） plasmid. Immunocytochemistry was performed to determine the knockdown efficiency. Tumour cells were studied for their ability to adhere to vascular endothelial cells. Confocal microscopy was used to analyse the changes in cytoskeletal F-actin. F-actin expression was measured by flow cytometry. Cell invasion ability was assessed using transwell chambers. The delta Np63-silenced tumour cells were shown to adhere more tightly than controls to vascular endothelial cells （P〈0.05）. The content of F-actin in the delta Np63-silenced cells was enhanced （P〈0.05）. The Matrigel invasion assays showed that human 5637 bladder cancer cells had a lower degree of motility when transfected with pdelta Np63-shRNA （P〈0.05）. In conclusion, silencing of the delta Np63 expression can enhance the adhesiveness of 5637 cells by inducing F-actin cytoskeleton production, and it will possibly inhibit the TCCB invasion and metastasis.
