Objective：To obtain information at the molecular level on the possible mechanism of MXR7 gene overexpressed in hepatocellular carcinoma （HCC） and also to provide a clue for further study. Methods：Genomic DNA was i...Objective：To obtain information at the molecular level on the possible mechanism of MXR7 gene overexpressed in hepatocellular carcinoma （HCC） and also to provide a clue for further study. Methods：Genomic DNA was isolated from 20 samples of hepatoma and paired non-HCC liver tissues, 2 cases of blood tumor and two types of cells （HepG2, MCF-7） and digested with two kinds of endonucleases （EcoR I and Eag I which is methylation sensitive endonuclease）. And the condition of MXR7 gene methylation was examined and analyzed by Southern blot. Results： MXR7 was unmethylated neither in tested tumorous liver samples nor in paired non HCC liver tissues. In addition, the same result was found in 2 blood tumor samples and HepG2. Only two paired samples had different methylation outcome, one was unmethylated and the other was partly methylated. Conclusion： MXR7 is unmethylated in HHC, suggesting methylation of MXR7 may have no relation with its expression and regulation.展开更多
文摘Objective：To obtain information at the molecular level on the possible mechanism of MXR7 gene overexpressed in hepatocellular carcinoma （HCC） and also to provide a clue for further study. Methods：Genomic DNA was isolated from 20 samples of hepatoma and paired non-HCC liver tissues, 2 cases of blood tumor and two types of cells （HepG2, MCF-7） and digested with two kinds of endonucleases （EcoR I and Eag I which is methylation sensitive endonuclease）. And the condition of MXR7 gene methylation was examined and analyzed by Southern blot. Results： MXR7 was unmethylated neither in tested tumorous liver samples nor in paired non HCC liver tissues. In addition, the same result was found in 2 blood tumor samples and HepG2. Only two paired samples had different methylation outcome, one was unmethylated and the other was partly methylated. Conclusion： MXR7 is unmethylated in HHC, suggesting methylation of MXR7 may have no relation with its expression and regulation.
