title: Frequent novel DNA copy number increase in squamous cell head and neck tumors.
abstract: We have undertaken a study of DNA copy number changes in head and neck squamous cell carcinomas to identify novel DNA copy number changes and to determine the significance of previous findings of cytogenetic alterations in cultured cells. Comparative genomic hybridization was performed on genomic DNA extracted from ten tumors. A novel copy number gain on chromosome 3q26-27 and a loss of chromosome 3p were found at high frequency (> or = 50% of tumors). Many other novel chromosomal copy number changes were identified but occurred at a lower frequency. In addition, our data confirm that DNA copy number changes that frequently occur in cultured cells, such as loss of chromosome 3p, also occur in tumors. Frequently altered loci may encode oncogenes or tumor suppressor genes involved in head and neck squamous cell carcinoma tumorigenesis.
authors.affiliation: Department of Radiation Oncology, University of California, San Francisco 94143, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Brzoska
authors.forename: N A
authors.initials: NA
authors.lastname: Levin
authors.forename: K K
authors.initials: KK
authors.lastname: Fu
authors.forename: M J
authors.initials: MJ
authors.lastname: Kaplan
authors.forename: M I
authors.initials: MI
authors.lastname: Singer
authors.forename: J W
authors.initials: JW
authors.lastname: Gray
authors.forename: M F
authors.initials: MF
authors.lastname: Christman
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D002869:Chromosome Aberrations; D002893:Chromosomes, Human, Pair 3; D004273:DNA, Neoplasm / Q000235:genetics*; D005260:Female; D005784:Gene Amplification; D015894:Genome, Human; D006258:Head and Neck Neoplasms / Q000235:genetics*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009693:Nucleic Acid Hybridization
chemical_list: D004273:DNA, Neoplasm