AIM: To investigate the expression of c-myc target from laryngeal cancer cells (MTLC) gene in gastric carcinoma (GC)tissues and the effect of MTLC over-expression on gastric carcinoma cell line BGC823.METHODS: RT-PCR ...AIM: To investigate the expression of c-myc target from laryngeal cancer cells (MTLC) gene in gastric carcinoma (GC)tissues and the effect of MTLC over-expression on gastric carcinoma cell line BGC823.METHODS: RT-PCR was performed to determine the expression of MTLC mRNA in GC and matched control tissues.BGC823 cells were transfected with an expression vector pcDNA3.1-MTLC by liposome and screened by G418. Growth of cells expressing MTLC was observed daily by manual counting. Apoptotic cells were determined by TdT-mediated dUTP nick-end labeling (TUNEL) assay.RESULTS: The expression of MTLC mRNAs was downregulated in 9(60%) of 15 cases of GC tissues. The growth rates of the BGC823 cells expressing MTLC were indistinguishable from that of control cells. A marked acceleration of apoptosis was observed in MTLC-expressing cells.CONCLUSION: MTLC was down-regulated in the majority of GC tissues and could promote apoptosis of GC cell lines,which suggests that MTLC may play an important role in the carcinogenesis of gastric carcinoma.展开更多
目的探讨MTLC(c-Myc target from laryngeal cancer cells)在食管癌中的表达及临床意义。方法选取食管癌标本25例作为研究组,切缘远端正常组织标本25例作为对照组,采用免疫组化方法检测组织中MTLC蛋白的表达情况。结果研究组中MTLC表达...目的探讨MTLC(c-Myc target from laryngeal cancer cells)在食管癌中的表达及临床意义。方法选取食管癌标本25例作为研究组,切缘远端正常组织标本25例作为对照组,采用免疫组化方法检测组织中MTLC蛋白的表达情况。结果研究组中MTLC表达量明显低于对照组,差异有统计学意义(P<0.05);研究组中高分化组MTLC与中低分化组的表达差异有统计学意义(P<0.05)。研究组中KI-67、c-Myc、p53表达量分别与MTLC表达呈负相关关系(P<0.05)。结论 MTLC可以作为食管癌的肿瘤标志物,MTLC低表达对食管癌的发生有促进作用,MTLC与KI-67、c-Myc、p53表达之间呈负相关关系。展开更多
为研究MTLC(c-myc target from laryngeal cancer cells)基因在胃癌组织中的表达及其对胃癌细胞系BGC823生长的影响,用RT-PCR法检测了MTLC mRNA在胃癌组织及配对对照组织中的表达,并将表达载体pcDNA3.1-MTLC用脂质体转染BGC823细胞,G41...为研究MTLC(c-myc target from laryngeal cancer cells)基因在胃癌组织中的表达及其对胃癌细胞系BGC823生长的影响,用RT-PCR法检测了MTLC mRNA在胃癌组织及配对对照组织中的表达,并将表达载体pcDNA3.1-MTLC用脂质体转染BGC823细胞,G418筛选后手工计数,绘制生长曲线,用TUNEL法检测细胞凋亡。结果表明,15例胃癌组织中有9例(60%)MTLC mRNA表达下调。表达MTLC的BGC823细胞生长速度与对照细胞无明显差异,但细胞凋亡显著增加。结论:MTLC基因在大多数胃癌中表达下调并可促进胃癌细胞凋亡,提示MTLC可能在胃癌发生过程中起重要作用。展开更多
目的研究MTLC(cmyc target from laryngeal cancercells)基因在喉癌组织中的表达规律及其在喉癌发生中的作用。方法用反转录聚合酶链反应法检测MTLCmRNA在喉癌组织及配对对照组织中的表达水平;用基因转染分析MTLC基因过表达对Hep2细胞...目的研究MTLC(cmyc target from laryngeal cancercells)基因在喉癌组织中的表达规律及其在喉癌发生中的作用。方法用反转录聚合酶链反应法检测MTLCmRNA在喉癌组织及配对对照组织中的表达水平;用基因转染分析MTLC基因过表达对Hep2细胞生长的影响。结果36份喉癌组织中有28份(77.8%)MTLCmRNA表达下调;与转染空质粒的对照细胞相比,表达MTLC的细胞生长明显受到抑制,凋亡细胞比例明显增高(喉癌组织为118/300,对照细胞为25/300)。结论MTLC基因在喉癌组织中表达下调,其过表达可抑制喉癌Hep2细胞生长并促进凋亡,提示MTLC可能在喉癌发生、发展过程中起重要作用。展开更多
基金the National Natural Science Foundation of China,No.30171008Funds of Educational Department,Liaoning Province,No.20121034
文摘AIM: To investigate the expression of c-myc target from laryngeal cancer cells (MTLC) gene in gastric carcinoma (GC)tissues and the effect of MTLC over-expression on gastric carcinoma cell line BGC823.METHODS: RT-PCR was performed to determine the expression of MTLC mRNA in GC and matched control tissues.BGC823 cells were transfected with an expression vector pcDNA3.1-MTLC by liposome and screened by G418. Growth of cells expressing MTLC was observed daily by manual counting. Apoptotic cells were determined by TdT-mediated dUTP nick-end labeling (TUNEL) assay.RESULTS: The expression of MTLC mRNAs was downregulated in 9(60%) of 15 cases of GC tissues. The growth rates of the BGC823 cells expressing MTLC were indistinguishable from that of control cells. A marked acceleration of apoptosis was observed in MTLC-expressing cells.CONCLUSION: MTLC was down-regulated in the majority of GC tissues and could promote apoptosis of GC cell lines,which suggests that MTLC may play an important role in the carcinogenesis of gastric carcinoma.
文摘目的探讨MTLC(c-Myc target from laryngeal cancer cells)在食管癌中的表达及临床意义。方法选取食管癌标本25例作为研究组,切缘远端正常组织标本25例作为对照组,采用免疫组化方法检测组织中MTLC蛋白的表达情况。结果研究组中MTLC表达量明显低于对照组,差异有统计学意义(P<0.05);研究组中高分化组MTLC与中低分化组的表达差异有统计学意义(P<0.05)。研究组中KI-67、c-Myc、p53表达量分别与MTLC表达呈负相关关系(P<0.05)。结论 MTLC可以作为食管癌的肿瘤标志物,MTLC低表达对食管癌的发生有促进作用,MTLC与KI-67、c-Myc、p53表达之间呈负相关关系。
文摘为研究MTLC(c-myc target from laryngeal cancer cells)基因在胃癌组织中的表达及其对胃癌细胞系BGC823生长的影响,用RT-PCR法检测了MTLC mRNA在胃癌组织及配对对照组织中的表达,并将表达载体pcDNA3.1-MTLC用脂质体转染BGC823细胞,G418筛选后手工计数,绘制生长曲线,用TUNEL法检测细胞凋亡。结果表明,15例胃癌组织中有9例(60%)MTLC mRNA表达下调。表达MTLC的BGC823细胞生长速度与对照细胞无明显差异,但细胞凋亡显著增加。结论:MTLC基因在大多数胃癌中表达下调并可促进胃癌细胞凋亡,提示MTLC可能在胃癌发生过程中起重要作用。
文摘目的研究MTLC(cmyc target from laryngeal cancercells)基因在喉癌组织中的表达规律及其在喉癌发生中的作用。方法用反转录聚合酶链反应法检测MTLCmRNA在喉癌组织及配对对照组织中的表达水平;用基因转染分析MTLC基因过表达对Hep2细胞生长的影响。结果36份喉癌组织中有28份(77.8%)MTLCmRNA表达下调;与转染空质粒的对照细胞相比,表达MTLC的细胞生长明显受到抑制,凋亡细胞比例明显增高(喉癌组织为118/300,对照细胞为25/300)。结论MTLC基因在喉癌组织中表达下调,其过表达可抑制喉癌Hep2细胞生长并促进凋亡,提示MTLC可能在喉癌发生、发展过程中起重要作用。