title: Frequent DNA methylation but not mutation of the ID4 gene in malignant lymphoma.
abstract: ID4 is a member of the inhibitor of DNA binding (ID) family, and inhibits the binding of basic helix-loop-helix transcription factors to DNA. In some malignant tumors, ID4 is inactivated by promoter hypermethylation, and is thought to be a candidate tumor suppressor gene (TSG). We have found that the promoter region of the ID4 gene is frequently methylated in lymphoid cell lines (100%, 9/9), primary diffuse large B-cell lymphoma (95%, 19/20), and follicular lymphoma (100%, 10/10). Somatic mutation of the ID4 gene was also examined, and no mutations were found. These findings suggest that the ID4 gene might be inactivated by DNA hypermethylation, and may function as a TSG in malignant lymphoma.
authors.affiliation: Clinical Research Center for Blood Diseases, National Hospital Organization Nagoya Medical Center, Nagoya, Japan.
authors.forename: Kazumi
authors.initials: K
authors.lastname: Hagiwara
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Nagai
authors.forename: Yinghua
authors.initials: Y
authors.lastname: Li
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Ohashi
authors.forename: Tomomitsu
authors.initials: T
authors.lastname: Hotta
authors.forename: Hidehiko
authors.initials: H
authors.lastname: Saito
mesh_terms: D019175:DNA Methylation; D016147:Genes, Tumor Suppressor; D006801:Humans; D051796:Inhibitor of Differentiation Proteins / Q000235:genetics*; D008198:Lymph Nodes; D016393:Lymphoma, B-Cell / Q000235:genetics*; D008224:Lymphoma, Follicular / Q000235:genetics*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics*; D011401:Promoter Regions, Genetic
chemical_list: C490128:ID4 protein, human; D051796:Inhibitor of Differentiation Proteins