title: High-throughput copy number analysis of 17q23 in 3520 tissue specimens by fluorescence in situ hybridization to tissue microarrays.
abstract: The chromosomal region 17q23 has been shown to be commonly amplified in breast tumors, especially those with poor prognosis. In addition to breast cancer, studies by comparative genomic hybridization have implicated the involvement of 17q23 in other tumor types as well. Here we performed a large-scale survey on the distribution and frequency of the 17q23 copy number increases across different tumor types using fluorescence in situ hybridization on tissue microarrays containing 4788 specimens. A total of 4429 tumor samples representing 166 different tumor categories and 359 normal tissue samples from 40 different tissue categories were analyzed. Successful hybridizations were observed in 3520 of the 4788 specimens (74%). Increased 17q23 copy number was detected in 15% of the evaluable specimens with tumors originating from the lung, mammary gland, and soft tissue being most frequently affected. Interestingly, high-level amplification was detected only in 2% of the tumors and was generally restricted to mammary tumors. In addition, we observed an association between the frequency of increased 17q23 copy number and tumor progression in various tumor types. These results indicate that increased 17q23 copy number occurs frequently in several different tumor types suggesting that increased dosage of genes in this region might play a role in development and progression of many tumor types.
authors.affiliation: Cancer Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA.
authors.forename: Claus L
authors.initials: CL
authors.lastname: Andersen
authors.forename: Outi
authors.initials: O
authors.lastname: Monni
authors.forename: Urs
authors.initials: U
authors.lastname: Wagner
authors.forename: Juha
authors.initials: J
authors.lastname: Kononen
authors.forename: Maarit
authors.initials: M
authors.lastname: Bärlund
authors.forename: Christoph
authors.initials: C
authors.lastname: Bucher
authors.forename: Philippe
authors.initials: P
authors.lastname: Haas
authors.forename: Antonio
authors.initials: A
authors.lastname: Nocito
authors.forename: Heidi
authors.initials: H
authors.lastname: Bissig
authors.forename: Guido
authors.initials: G
authors.lastname: Sauter
authors.forename: Anne
authors.initials: A
authors.lastname: Kallioniemi
mesh_terms: D005784:Gene Amplification; D018628:Gene Dosage; D006801:Humans; D009362:Neoplasm Metastasis / Q000235:genetics; D009369:Neoplasms / Q000235:genetics*; D020411:Oligonucleotide Array Sequence Analysis