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[Cancer Research 64, 40-47, January 1, 2004]
© 2004 American Association for Cancer Research

Regular Articles

Genomic and Expression Analysis of the 8p11–12 Amplicon in Human Breast Cancer Cell Lines

Michael E. Ray1, Zeng Quan Yang1, Donna Albertson4, Celina G. Kleer3, Joseph G. Washburn3, Jill A. Macoska2 and Stephen P. Ethier1

1Departments of Radiation Oncology and 2Urology, 3Comprehensive Cancer Center, University of Michigan Medical School, Ann Arbor, Michigan, and 4Cancer Research Institute, University of California San Francisco, San Francisco, California

Gene amplification is an important mechanism of oncogene activation in breast and other cancers. Characterization of amplified regions of the genome in breast cancer has led to the identification of important oncogenes including erbB-2/HER-2, C-MYC, and fibroblast growth factor receptor (FGFR) 2. Chromosome 8p11-p12 is amplified in 10–15% of human breast cancers. The putative oncogene FGFR1 localizes to this region; however, we show evidence that FGFR inhibition fails to slow growth of three breast cancer cell lines with 8p11-p12 amplification. We present a detailed analysis of this amplicon in three human breast cancer cell lines using comparative genomic hybridization, traditional Southern and Northern analysis, and chromosome 8 cDNA microarray expression profiling. This study has identified new candidate oncogenes within the 8p11-p12 region, supporting the hypothesis that genes other than FGFR1 may contribute to oncogenesis in breast cancers with proximal 8p amplification.




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Molecular Cancer Research Cancer Prevention Research
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