首页> 外文期刊>Pathobiology: journal of immunopathology, molecular and cellular biology >Retinoblastoma protein prevents staurosporine-induced cell death in a retinoblastoma-defective human glioma cell line.
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Retinoblastoma protein prevents staurosporine-induced cell death in a retinoblastoma-defective human glioma cell line.

机译:视网膜母细胞瘤蛋白可防止星形母细胞瘤缺陷的人神经胶质瘤细胞系中星形孢菌素诱导的细胞死亡。

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OBJECTIVE: To investigate the mechanism of staurosporine-induced glioma cell death and cell cycle arrest using adenovirus-mediated gene transfection, as well as the function of retinoblastoma (Rb) and genetic instability induced by staurosporine. METHODS: Cell cycle regulation, cell death and nuclear abnormalities induced by staurosporine were examined using an adenovirus vector expressing Rb, p16 or p21 genes in human glioma cell lines. RESULTS: The Rb-defective SF-539 cell line was resistant to staurosporine compared with cell lines expressing intact Rb. SF-539 glioma cells exposed to staurosporine became multinucleated and then died. Multinucleation was prevented in SF-539 cells transfected with the Rb gene, thus decreasing the death rate of these cells. CONCLUSIONS: These results imply that enforced Rb expression protects cells from genomic instability induced by staurosporine regardless of its upstream molecular effects.
机译:目的:探讨腺病毒介导的基因转染对星形孢菌素诱导的神经胶质瘤细胞死亡和细胞周期阻滞的机制,以及星形孢菌素诱导的视网膜母细胞瘤(Rb)的功能和遗传不稳定性。方法:使用表达Rb,p16或p21基因的腺病毒载体在人胶质瘤细胞系中检测星形孢菌素诱导的细胞周期调节,细胞死亡和核异常。结果:与表达完整Rb的细胞系相比,Rb缺陷的SF-539细胞系对星形孢菌素具有抗性。暴露于星形孢菌素的SF-539胶质瘤细胞成为多核细胞,然后死亡。在用Rb基因转染的SF-539细胞中防止了多核化,从而降低了这些细胞的死亡率。结论:这些结果表明,Rb表达的增强保护细胞免受星形孢菌素诱导的基因组不稳定的影响,无论其上游分子的作用如何。

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