人类食管癌相关基因4（esophageal cancer related gene 4, ECRG4）是一种潜在的抑癌基因，该基因在食管鳞状细胞癌[1,2,3,4]、乳腺癌[5]、结肠癌[6,7]、胶质瘤[6,8]、肾癌[9]、喉癌[10]等多种肿瘤细胞中具有抑癌作用，并且在这些肿瘤...人类食管癌相关基因4（esophageal cancer related gene 4, ECRG4）是一种潜在的抑癌基因，该基因在食管鳞状细胞癌[1,2,3,4]、乳腺癌[5]、结肠癌[6,7]、胶质瘤[6,8]、肾癌[9]、喉癌[10]等多种肿瘤细胞中具有抑癌作用，并且在这些肿瘤细胞中低表达或者不表达，但在人类正常组织中广泛表达。目前研究发现，ECRG4的抗肿瘤作用可能包括阻滞肿瘤细胞周期、促进细胞凋亡、抑制细胞迁移与侵袭等。本文就ECRG4抗肿瘤的分子机制进行综述，并讨论该基因在肿瘤治疗方面的应用前景。展开更多
Background and Objective: Radioresistant cells in esophageal cancer is one of the important reasons for the local failure of radiotherapy. In recent years, some researchers used gene chip technology to screen the diff...Background and Objective: Radioresistant cells in esophageal cancer is one of the important reasons for the local failure of radiotherapy. In recent years, some researchers used gene chip technology to screen the differentially expressed genes between parental and radioresistant human esophageal cancer cells. But there were some problems in these studies, for example comparing cells at only one time interval, and genetic background not matching. In this study, we selected 3 different pairs of parental and radioresistant human esophageal cancer cells, and compared the gene expression profiles by cDNA microarray at 3 time intervals to identify and analyze the differentially expressed genes between parental and radioresistant human esophageal cancer cells. Methods: We compared the gene expression profiles between parental cells (TE13, Seg-1, Kyse170) and radioresistant cells (TE13R, Seg-1R, Kyse170R) before, and at 8 h and 24 h after irradiation with a cDNA microarray consisting of 48 000 genes (Human Genome). We identified differentially expressed genes by Pathway and GO analyses, and verified the differentially expressed genes LEF1 and CTNNB1 by RT-PCR. Results: A total of 460, 451, and 397 differentially expressed genes were found before, and at 8 h and 24 h after irradiation. After Pathway and GO analyses, 14 differentially expressed genes, participating in cell growth, apoptosis, cell cycle regulation, gene repair and signal transmission, were selected to further research. LEF1 and CTNNB1 were verified by RT-PCR, and the results were consistent with those of cDNA microarray. Conclusions: The WNT signal pathway may be an important pathway participating in the formation of radioresistance of esophageal cancer cells. LEF1 and CTNNB1 may be the important genes causing the esophageal cancer cell radioresistance.展开更多
文摘人类食管癌相关基因4（esophageal cancer related gene 4, ECRG4）是一种潜在的抑癌基因，该基因在食管鳞状细胞癌[1,2,3,4]、乳腺癌[5]、结肠癌[6,7]、胶质瘤[6,8]、肾癌[9]、喉癌[10]等多种肿瘤细胞中具有抑癌作用，并且在这些肿瘤细胞中低表达或者不表达，但在人类正常组织中广泛表达。目前研究发现，ECRG4的抗肿瘤作用可能包括阻滞肿瘤细胞周期、促进细胞凋亡、抑制细胞迁移与侵袭等。本文就ECRG4抗肿瘤的分子机制进行综述，并讨论该基因在肿瘤治疗方面的应用前景。
基金National Natural Science Foundation of China (No.30670619)
文摘Background and Objective: Radioresistant cells in esophageal cancer is one of the important reasons for the local failure of radiotherapy. In recent years, some researchers used gene chip technology to screen the differentially expressed genes between parental and radioresistant human esophageal cancer cells. But there were some problems in these studies, for example comparing cells at only one time interval, and genetic background not matching. In this study, we selected 3 different pairs of parental and radioresistant human esophageal cancer cells, and compared the gene expression profiles by cDNA microarray at 3 time intervals to identify and analyze the differentially expressed genes between parental and radioresistant human esophageal cancer cells. Methods: We compared the gene expression profiles between parental cells (TE13, Seg-1, Kyse170) and radioresistant cells (TE13R, Seg-1R, Kyse170R) before, and at 8 h and 24 h after irradiation with a cDNA microarray consisting of 48 000 genes (Human Genome). We identified differentially expressed genes by Pathway and GO analyses, and verified the differentially expressed genes LEF1 and CTNNB1 by RT-PCR. Results: A total of 460, 451, and 397 differentially expressed genes were found before, and at 8 h and 24 h after irradiation. After Pathway and GO analyses, 14 differentially expressed genes, participating in cell growth, apoptosis, cell cycle regulation, gene repair and signal transmission, were selected to further research. LEF1 and CTNNB1 were verified by RT-PCR, and the results were consistent with those of cDNA microarray. Conclusions: The WNT signal pathway may be an important pathway participating in the formation of radioresistance of esophageal cancer cells. LEF1 and CTNNB1 may be the important genes causing the esophageal cancer cell radioresistance.
