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锌指结构转录因子锌指蛋白148和SP5对P53转录活性的作用
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作者 王代伟 周晨 +7 位作者 张品正 王旭莹 李佳文 马雨凯 严佳琦 王志婷 王佳琪 郭志义 《中国生物化学与分子生物学报》 北大核心 2025年第5期707-715,共9页
P53是关键的肿瘤抑制基因,受到多方面的调控。ZNF148和SP5作为锌指结构的转录因子,在肿瘤的抑制和癌症发生中发挥着重要作用,它们与P53基因之间的调控关系未见报道。本文采用P53表达水平差异的Ishikawa与A549细胞系作为研究模型,探讨ZNF... P53是关键的肿瘤抑制基因,受到多方面的调控。ZNF148和SP5作为锌指结构的转录因子,在肿瘤的抑制和癌症发生中发挥着重要作用,它们与P53基因之间的调控关系未见报道。本文采用P53表达水平差异的Ishikawa与A549细胞系作为研究模型,探讨ZNF148与SP5对P53基因的转录调控。研究发现,转录因子ZNF148和SP5在细胞系中表达量存在差异,ZNF148在Ishikawa中mRNA表达是A549的1.9倍,SP5在A549中mRNA表达是Ishikawa的802.4倍。通过过表达以及敲低实验发现,在Ishikawa细胞中,ZNF148敲低后P53表达量下降(81.8%),过表达SP5后P53表达量上升(2.6倍);在A549细胞中分别转染si-SP5和ZNF148表达质粒,P53的mRNA表达量上升6.6倍和14.6倍。结果表明,转录因子ZNF148激活而SP5抑制P53的表达。通过生物信息学检索发现,在P53基因启动子的区域具有ZNF148与SP5转录因子结合的保守序列。双荧光素酶报告基因技术数据显示,Ishikawa和A549细胞中过表达ZNF148与对照组相比荧光素酶活性提高了2.1倍和4.2倍(P<0.05);转染SP5质粒与对照组相比荧光素酶活性下降了约77.1%和35.7%(P<0.05);而突变了P53基因启动子的ZNF148与SP5的结合位点序列,则该效应消失。进一步转染不同比例的ZNF148与SP5表达质粒,发现SP5可以逆转ZNF148对P53的转录激活作用。研究表明,ZNF148与SP5在P53基因启动子的共有序列,以及二者的比例可能影响P53的转录活性。进一步研究了相关的Wnt通路基因的表达以及敲低ZNF148与SP5后细胞的增值情况,观察2转录因子在肿瘤中的作用。综上,ZNF148与SP5共同调控P53基因的转录活性,二者的表达水平有可能是影响P53基因活性的关键因子。 展开更多
关键词 锌指结构 锌指蛋白148 Sp5转录因子 P53 转录调控
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ZNF148/PFKP/PD-L1 axis promotes non-small cell lung cancer proliferation, migration and glycolysis
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作者 Jialiang Zhu Yufan Chen +5 位作者 Longyu Jin Wei Feng Huaidong Hu Wenbo Xue Zhigang Zhou Guangyu Luo 《Journal of Cancer Metastasis and Treatment》 CAS 2023年第1期421-430,共10页
Aim:Cancer-related deaths are primarily caused by lung cancer around the world.The prognosis and burden of lung cancer must be improved by identifying novel biomarkers for diagnosis and treatment.In non-small cell lun... Aim:Cancer-related deaths are primarily caused by lung cancer around the world.The prognosis and burden of lung cancer must be improved by identifying novel biomarkers for diagnosis and treatment.In non-small cell lung cancer(NSCLC),the platelet isoform of phosphofructokinase 1(PFKP)has been identified as a tumor-promoting oncogene.The current study examined the specific role that PFKP plays in NSCLC tumorigenesis,as well as the underlying mechanism.Methods:A lung cancer dataset was obtained from the TCGA in order to examine the expression of PFKP.Using the Kaplan-Meier Plotter website,we calculated the overall survival(OS)along with the recurrence-free survivals(RFS)curves with high and low levels of PFKP in lung cancer.The mechanism by which zinc finger protein 148(ZNF148)regulated PFKP/PD-L1 levels in NSCLC was investigated through chromatin immunoprecipitation(ChIP),qRT-PCR,and western blotting.In order to uncover ZNF148's function in NSCLC,subsequent functional studies included CCK-8,colony formation,and Transwell,along with glycolysis assays.Student’s T-test was conducted for data analysis with GraphPad Prism 9.0.Results:The expression of PFKP in NSCLC was increased,and it was linked to worse outcomes.This increased expression of PFKP in NSCLC was induced by ZNF148.Silencing ZNF148 remarkably dampened NSCLC cell proliferation,invasion,and glycolysis capacities.According to a mechanistic study,ZNF148 regulates the PFKP/PD-L1 axis,which promotes NSCLC tumorigenesis.Conclusion:It has been established that ZNF148-induced PFKP is key to the proliferation,invasion,and glycolysis abilities of NSCLC cells by regulating PD-L1 expression.Therefore,the ZNF148/PFKP/PD-L1 axis could be a potential biological signature and target for NSCLC diagnosis and treatment. 展开更多
关键词 znf148 PFKP PD-L1 NSCLC PROLIFERATION
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