title: Characterization of target genes at the 2p15-16 amplicon in diffuse large B-cell lymphoma.
abstract: Amplification of 2p has been observed as a recurrent alteration in diffuse large B-cell lymphoma (DLBCL). Whereas two candidate oncogenes, REL and BCL11A, have been investigated as targets for 2p amplification, the question remains as to whether the true target gene in the amplicon is REL, BCL11A or both. We previously identified frequent genomic gains of chromosomal 2p in 25 out of 99 DLBCL cases by means of genome-wide array comparative genomic hybridization (CGH). All of these 25 cases included recurrent copy number gain at 2p15-16. In the study presented here, cases were analyzed in greater detail by means of contig bacterial artificial chromosome (BAC) array CGH for the 4.5-Mb region at 2p15-16, which contained 33 BAC clones. We confined the minimal common region to 500-kb in length, where only the candidate oncogene REL, and not BCL11A, is located. Real-time quantitative PCR was carried out to investigate the correlation between genomic gain and expression. It showed a significant correlation for both genes, indicating that these two genes are common targets for the 2p15-16 amplicon. However, given the fact that REL is more frequently amplified than BCL11A, the REL gene may play a more important role than BCL11A in the pathogenesis of DLBCL.
authors.affiliation: Division of Molecular Medicine, Aichi Cancer Center Research Institute, Nagoya 464-8681, Japan.
authors.forename: Noriko
authors.initials: N
authors.lastname: Fukuhara
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tagawa
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kameoka
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kasugai
authors.forename: Sivasundaram
authors.initials: S
authors.lastname: Karnan
authors.forename: Junichi
authors.initials: J
authors.lastname: Kameoka
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sasaki
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Morishima
authors.forename: Shigeo
authors.initials: S
authors.lastname: Nakamura
authors.forename: Masao
authors.initials: M
authors.lastname: Seto
mesh_terms: D022202:Chromosomes, Artificial, Bacterial; D002889:Chromosomes, Human, Pair 2 / Q000235:genetics*; D005784:Gene Amplification; D006801:Humans; D016393:Lymphoma, B-Cell / Q000235:genetics*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D020133:Reverse Transcriptase Polymerase Chain Reaction