EZH2 is over-expressed in human colon cancer and is closely associated with tumor proliferation,metastasis and poor prognosis.Targeting and inhibiting EZH2 may be an effective therapeutic strategy for colon cancer.3-D...EZH2 is over-expressed in human colon cancer and is closely associated with tumor proliferation,metastasis and poor prognosis.Targeting and inhibiting EZH2 may be an effective therapeutic strategy for colon cancer.3-Deazaneplanocin A(DZNep),as an EZH2 inhibitor,can suppress cancer cell growth.However,the anti-cancer role of DZNep in colon cancer cells has been rarely studied.In this study,we demonstrate that DZNep can inhibit the growth and survival of colon cancer HCT116 cells by inducing cellular senescence and apoptosis.The study provides a novel view of anti-cancer mechanisms of DZNep in human colon cancer cells.展开更多
目的研究姜黄素抑制结直肠癌HCT116细胞增殖的分子机制。方法体外培养HCT116细胞,四甲基偶氮唑蓝比色法(MTT)检测不同浓度姜黄素(0、10、20、50、100、200μmol/L)对HCT116细胞增殖率的影响,实验分空白对照组、EGF组(单独加入20 ng/m L ...目的研究姜黄素抑制结直肠癌HCT116细胞增殖的分子机制。方法体外培养HCT116细胞,四甲基偶氮唑蓝比色法(MTT)检测不同浓度姜黄素(0、10、20、50、100、200μmol/L)对HCT116细胞增殖率的影响,实验分空白对照组、EGF组(单独加入20 ng/m L EGF)、EGF+姜黄素组;细胞锚定增殖实验检测药物对HCT116细胞增殖的抑制作用;体外结合及体外激酶实验检测姜黄素对磷酸化酶b激酶(PBK)活性的影响;Western blotting及免疫组织化学方法检测姜黄素对PBK下游信号通路的影响。结果当姜黄素浓度<50μmol/L时,对HCT116细胞影响较小;而当浓度达到100μmol/L时,HCT116细胞凋亡明显增加。HCT116细胞在软琼脂内锚定增殖的结果显示:与EGF组比较,EGF+姜黄素组细胞克隆小且克隆数量少,具有药物浓度依赖性。体外结合及体外激酶实验结果显示姜黄素可以结合PBK,并抑制PBK的活性。Western blotting及免疫组织化学结果显示姜黄素明显下调PBK下游信号通路ERK1/2及H3的磷酸化水平,具有时间和浓度依赖性。结论在结直肠癌HCT116细胞中,姜黄素可能通过抑制PBK的活性,起到抗HCT116细胞增殖的作用。展开更多
The role of lncRNA KCNQ1 opposite strand/antisense transcript 1(KCNQ1OT1)in colon cancer involves various tumorigenic processes and has been studed widely.However,the mechanism by which it promotes colon cancer remain...The role of lncRNA KCNQ1 opposite strand/antisense transcript 1(KCNQ1OT1)in colon cancer involves various tumorigenic processes and has been studed widely.However,the mechanism by which it promotes colon cancer remains unclear.Retrovirnl vector pSEB61 was retroftted in established HCT116 siKCN and SW480-siKCN cells to silence KCNQ1 OT1.Cellular proliferation was measured using CCK8 assay,and flow cytometry(FCM)detected cell cydle changes.RNA sequencing(RNA Seq)analysis showed differentially expressed genes(DEGs).Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were carried out to analyze enriched functions and signaling pathways.RT-qPCR,immunofluorescence,and western blotting were carried out to validate downstream gene expressions.The effects of tumorigenesis were evaluated in BALB/c nude mice by tumor xenografts.Our data revealed that the silencing of KONQ1OT1 in HCT116 and SW480 cells slowed cell growth and decreased the number of cells in the G2/M phase.RNA-Seq analysis showed the data of DEGs enriched in various GO and KEGG pathways such as DNA replication and cell cyde.RT qPCR,immunofluorescence,and western blotting confirmed downstream CCNE2 and PCNA gene expressions.HCT116 siKCN cells signifcantly suppressed tumorigenesis in BALB/c nude mice.Our study suggests that lncRNA KCNQ1OT1 may provide a promising therapeutic strategy for colon cancer.展开更多
基金co-sponsored by Sino-Singapore Collaboration Project from the Ministry of Science and Technology (MOST) of China (No.2013DFG32990)National Natural Science Foundation of China (NSFC Nos.81373438 and 31201040)National Mega-Project for Innovative Drugs by MOST (No.2012ZX09301002-001-015)
文摘EZH2 is over-expressed in human colon cancer and is closely associated with tumor proliferation,metastasis and poor prognosis.Targeting and inhibiting EZH2 may be an effective therapeutic strategy for colon cancer.3-Deazaneplanocin A(DZNep),as an EZH2 inhibitor,can suppress cancer cell growth.However,the anti-cancer role of DZNep in colon cancer cells has been rarely studied.In this study,we demonstrate that DZNep can inhibit the growth and survival of colon cancer HCT116 cells by inducing cellular senescence and apoptosis.The study provides a novel view of anti-cancer mechanisms of DZNep in human colon cancer cells.
基金the Scientific Research Project of Anhui Provincial Health Commission in 2021(#AHWJ2021b109 to LS)Scientific and Technological Research Program of Chongqing Municipal Education Commission(#KJZD-K201900402 to TZ)+1 种基金Special Fund for Wannan Medical College Scholar Project(#WK2021F07)Educational Commission of Anhui Province of China(2022AH051241).
文摘The role of lncRNA KCNQ1 opposite strand/antisense transcript 1(KCNQ1OT1)in colon cancer involves various tumorigenic processes and has been studed widely.However,the mechanism by which it promotes colon cancer remains unclear.Retrovirnl vector pSEB61 was retroftted in established HCT116 siKCN and SW480-siKCN cells to silence KCNQ1 OT1.Cellular proliferation was measured using CCK8 assay,and flow cytometry(FCM)detected cell cydle changes.RNA sequencing(RNA Seq)analysis showed differentially expressed genes(DEGs).Gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway enrichment analyses were carried out to analyze enriched functions and signaling pathways.RT-qPCR,immunofluorescence,and western blotting were carried out to validate downstream gene expressions.The effects of tumorigenesis were evaluated in BALB/c nude mice by tumor xenografts.Our data revealed that the silencing of KONQ1OT1 in HCT116 and SW480 cells slowed cell growth and decreased the number of cells in the G2/M phase.RNA-Seq analysis showed the data of DEGs enriched in various GO and KEGG pathways such as DNA replication and cell cyde.RT qPCR,immunofluorescence,and western blotting confirmed downstream CCNE2 and PCNA gene expressions.HCT116 siKCN cells signifcantly suppressed tumorigenesis in BALB/c nude mice.Our study suggests that lncRNA KCNQ1OT1 may provide a promising therapeutic strategy for colon cancer.
