|Publication Type||Journal Article|
|Year of Publication||2007|
|Authors||Weir, BA, Woo, MS, Getz, G, Perner, S, Ding, L, Beroukhim, R, Lin, WM, Province, MA, Kraja, A, Johnson, LA, Shah, K, Sato, M, Thomas, RK, Barletta, JA, Borecki, IB, Broderick, S, Chang, A|
|Pages||893 - 8|
|Keywords||Adenocarcinoma, Cancer, Cell Line, Chromosome Deletion, Chromosomes, Gene Amplification, Genome, Genomics, Genotype, Human, Humans, Intracellular Signaling Peptides and Proteins, Loss of Heterozygosity, Lung Neoplasms, Neoplasms, Nuclear Pr, Pair 14, Tumor|
Somatic alterations in cellular DNA underlie almost all human cancers. The prospect of targeted therapies and the development of high-resolution, genome-wide approaches are now spurring systematic efforts to characterize cancer genomes. Here we report a large-scale project to characterize copy-number alterations in primary lung adenocarcinomas. By analysis of a large collection of tumours (n = 371) using dense single nucleotide polymorphism arrays, we identify a total of 57 significantly recurrent events. We find that 26 of 39 autosomal chromosome arms show consistent large-scale copy-number gain or loss, of which only a handful have been linked to a specific gene. We also identify 31 recurrent focal events, including 24 amplifications and 7 homozygous deletions. Only six of these focal events are currently associated with known mutations in lung carcinomas. The most common event, amplification of chromosome 14q13.3, is found in approximately 12% of samples. On the basis of genomic and functional analyses, we identify NKX2-1 (NK2 homeobox 1, also called TITF1), which lies in the minimal 14q13.3 amplification interval and encodes a lineage-specific transcription factor, as a novel candidate proto-oncogene involved in a significant fraction of lung adenocarcinomas. More generally, our results indicate that many of the genes that are involved in lung adenocarcinoma remain to be discovered.