Human Gene Set: HATADA_METHYLATED_IN_LUNG_CANCER_UP


Standard name HATADA_METHYLATED_IN_LUNG_CANCER_UP
Systematic name M19508
Brief description Genes with hypermethylated DNA in lung cancer samples.
Full description or abstract DNA methylation in the promoter region of a gene is associated with a loss of that gene's expression and plays an important role in gene silencing. The inactivation of tumor-suppressor genes by aberrant methylation in the promoter region is well recognized in carcinogenesis. However, there has been little study in this area when it comes to genome-wide profiling of the promoter methylation. Here, we developed a genome-wide profiling method called Microarray-based Integrated Analysis of Methylation by Isoschizomers to analyse the DNA methylation of promoter regions of 8091 human genes. With this method, resistance to both the methylation-sensitive restriction enzyme HpaII and the methylation-insensitive isoschizomer MspI was compared between samples by using a microarray with promoter regions of the 8091 genes. The reliability of the difference in HpaII resistance was judged using the difference in MspI resistance. We demonstrated the utility of this method by finding epigenetic mutations in cancer. Aberrant hypermethylation is known to inactivate tumour suppressor genes. Using this method, we found that frequency of the aberrant promoter hypermethylation in cancer is higher than previously hypothesized. Aberrant hypomethylation is known to induce activation of oncogenes in cancer. Genome-wide analysis of hypomethylated promoter sequences in cancer demonstrated low CG/GC ratio of these sequences, suggesting that CpG-poor genes are sensitive to demethylation activity in cancer.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 16407832   Authors: Hatada I,Fukasawa M,Kimura M,Morita S,Yamada K,Yoshikawa T,Yamanaka S,Endo C,Sakurada A,Sato M,Kondo T,Horii A,Ushijima T,Sasaki H
Exact source Table 2S: hypermethylated
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Source species Homo sapiens
Contributed by Arthur Liberzon (MSigDB Team)
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Human_RefSeq
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Version history 3.0: First introduced

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