通过将体内稳定同位素标记细胞培养技术(AACT/SILAC)与LC-MS/MS联用,对哺乳动物细胞中TNF-α/NF-κB信号通路相关蛋白在TNF-α及TSA存在情况下乙酰化变化情况进行了研究.在TSA协同处理的、TNF-α刺激的细胞中鉴定到3个乙酰化蛋白,其中...通过将体内稳定同位素标记细胞培养技术(AACT/SILAC)与LC-MS/MS联用,对哺乳动物细胞中TNF-α/NF-κB信号通路相关蛋白在TNF-α及TSA存在情况下乙酰化变化情况进行了研究.在TSA协同处理的、TNF-α刺激的细胞中鉴定到3个乙酰化蛋白,其中核糖体蛋白L4(60SRibosomal Protein L4,RPL4)已被报道存在乙酰化的后修饰,转铁蛋白受体1(Transferrin Receptor Protein 1,TfR1)和凋亡诱导因子3(ApoptosisInducing Factor,Mitochondrion-associated,3,AIFM3)尚未见报道.展开更多
Non-small cell lung cancer(NSCLC)is a malignant tumor with high incidence worldwide.Triptolide(TP),extracted from Tripterygium wilfordii Hook F,exhibits potent broad-spectrum antitumor activity.Although some mechanism...Non-small cell lung cancer(NSCLC)is a malignant tumor with high incidence worldwide.Triptolide(TP),extracted from Tripterygium wilfordii Hook F,exhibits potent broad-spectrum antitumor activity.Although some mechanisms through which TP inhibits NSCLC are well understood,those that involve ribosomal proteins remain yet to be understood.In this study,the transcriptome and proteome were integrated and analyzed.Our data indicated ribosomal protein L4(RPL4)to be a core hub protein in the protein-protein interaction network.RPL4 is overexpressed in NSCLC tissues and cells.Transfection with siRPL4 or TP treatment alone arrested the cell cycle in the G1 phase,induced cell apoptosis,and repressed cell invasion.Compared to treating cells with TP alone or siRPL4,treating them with siRPL4–TP enhanced the inhibition of NSCLC cells.Reduced RPL4 expression reinforced the inhibitory effects of TP on NSCLC cells by disrupting the MDM2-P53 pathway and by altering the expression of PARP1/Snail/cyclin D1.In vivo assays verified that TP induced cell apoptosis and reduced RPL4 expression in xenografts.These findings provide clues to facilitate the development of effective TP-based therapeutic strategies to kill NSCLC cells.展开更多
目的:儿童白血病细胞全基因组芯片数据聚类分析发现,核糖体蛋白L4(ribosomal protein L4,RPL4)启动子区域具有转录因子Runx1的结合位点TTCATTCT,由此推测Runx1可能与该基因启动子之间存在调控作用。本研究通过观察Runx1蛋白与RPL4启动...目的:儿童白血病细胞全基因组芯片数据聚类分析发现,核糖体蛋白L4(ribosomal protein L4,RPL4)启动子区域具有转录因子Runx1的结合位点TTCATTCT,由此推测Runx1可能与该基因启动子之间存在调控作用。本研究通过观察Runx1蛋白与RPL4启动子之间的相互作用,了解Runx1对RPL4启动子转录活性的影响,探讨其在儿童白血病发生机制中的意义。方法:构建含RPL4启动子及其突变体的荧光素酶报告质粒,与Runx1的表达质粒共转染293T细胞,进行荧光素酶活性分析。结果:Runx1蛋白可使RPL4启动子的转录活性降低(P<0.01);随着Runx1剂量的增加,RPL4启动子的转录水平呈剂量依赖性降低(P<0.01);Runx1蛋白对RPL4启动子的突变体转录活性无调控作用(P>0.05)。结论:Runx1蛋白对RPL4启动子具有转录抑制作用,且具有明显的剂量依赖性;Runx1蛋白通过结合RPL4启动子区域的TTCATTCT位点发挥调控作用。展开更多
文摘通过将体内稳定同位素标记细胞培养技术(AACT/SILAC)与LC-MS/MS联用,对哺乳动物细胞中TNF-α/NF-κB信号通路相关蛋白在TNF-α及TSA存在情况下乙酰化变化情况进行了研究.在TSA协同处理的、TNF-α刺激的细胞中鉴定到3个乙酰化蛋白,其中核糖体蛋白L4(60SRibosomal Protein L4,RPL4)已被报道存在乙酰化的后修饰,转铁蛋白受体1(Transferrin Receptor Protein 1,TfR1)和凋亡诱导因子3(ApoptosisInducing Factor,Mitochondrion-associated,3,AIFM3)尚未见报道.
基金supported by the National Natural Science Foundation of China(Grant Nos.82004007 and 81774026).
文摘Non-small cell lung cancer(NSCLC)is a malignant tumor with high incidence worldwide.Triptolide(TP),extracted from Tripterygium wilfordii Hook F,exhibits potent broad-spectrum antitumor activity.Although some mechanisms through which TP inhibits NSCLC are well understood,those that involve ribosomal proteins remain yet to be understood.In this study,the transcriptome and proteome were integrated and analyzed.Our data indicated ribosomal protein L4(RPL4)to be a core hub protein in the protein-protein interaction network.RPL4 is overexpressed in NSCLC tissues and cells.Transfection with siRPL4 or TP treatment alone arrested the cell cycle in the G1 phase,induced cell apoptosis,and repressed cell invasion.Compared to treating cells with TP alone or siRPL4,treating them with siRPL4–TP enhanced the inhibition of NSCLC cells.Reduced RPL4 expression reinforced the inhibitory effects of TP on NSCLC cells by disrupting the MDM2-P53 pathway and by altering the expression of PARP1/Snail/cyclin D1.In vivo assays verified that TP induced cell apoptosis and reduced RPL4 expression in xenografts.These findings provide clues to facilitate the development of effective TP-based therapeutic strategies to kill NSCLC cells.
文摘目的:儿童白血病细胞全基因组芯片数据聚类分析发现,核糖体蛋白L4(ribosomal protein L4,RPL4)启动子区域具有转录因子Runx1的结合位点TTCATTCT,由此推测Runx1可能与该基因启动子之间存在调控作用。本研究通过观察Runx1蛋白与RPL4启动子之间的相互作用,了解Runx1对RPL4启动子转录活性的影响,探讨其在儿童白血病发生机制中的意义。方法:构建含RPL4启动子及其突变体的荧光素酶报告质粒,与Runx1的表达质粒共转染293T细胞,进行荧光素酶活性分析。结果:Runx1蛋白可使RPL4启动子的转录活性降低(P<0.01);随着Runx1剂量的增加,RPL4启动子的转录水平呈剂量依赖性降低(P<0.01);Runx1蛋白对RPL4启动子的突变体转录活性无调控作用(P>0.05)。结论:Runx1蛋白对RPL4启动子具有转录抑制作用,且具有明显的剂量依赖性;Runx1蛋白通过结合RPL4启动子区域的TTCATTCT位点发挥调控作用。
