title: A comprehensive catalog of CpG islands methylated in human lung adenocarcinomas for the identification of tumor suppressor genes.
abstract: CpG island methylation is an important mechanism in gene silencing and is a key epigenetic event in cancer development. As yet, the number and identities of the genes that are inactivated in cancer cells has not been determined. In order to address this issue, we have performed a comprehensive isolation of CpG islands that are methylated in human lung adenocarcinomas. We have isolated approximately 200 CpG islands that are methylated in tumor DNA including those of known tumor-associated genes such as the HOXA5 gene. As the library contains the CpG islands of a number of known tumor suppressor genes it is highly likely that additional, previously unidentified tumor suppressor genes, will be present. On average, 1-2% of CpG islands were methylated specifically in tumors although this figure differed greatly between patients. This study provides an important resource in the search for genes inactivated in tumors and for the investigation of epigenetic dysregulation of gene expression by CpG island methylation.
authors.affiliation: DNA Methylation and Genome Function Project, National Cancer Center Research Institute, 1-1, Tsukiji 5-chome, Chuo-ku, Tokyo 104-0045, Japan. mshirais@ncc.go.jp
authors.forename: Masahiko
authors.initials: M
authors.lastname: Shiraishi
authors.forename: Azumi
authors.initials: A
authors.lastname: Sekiguchi
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Terry
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Oates
authors.forename: Yuji
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Ying H
authors.initials: YH
authors.lastname: Chuu
authors.forename: Miyo
authors.initials: M
authors.lastname: Munakata
authors.forename: Takao
authors.initials: T
authors.lastname: Sekiya
mesh_terms: D000230:Adenocarcinoma / Q000235:genetics*; D000368:Aged; D018899:CpG Islands / Q000235:genetics*; D019175:DNA Methylation; D016147:Genes, Tumor Suppressor; D015698:Genomic Library; D006801:Humans; D008175:Lung Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014158:Transcription, Genetic