alexa A 1 Mb minimal amplicon at 8p11-12 in breast cancer identifies new candidate oncogenes.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Garcia MJ, Pole JC, Chin SF, Teschendorff A, Naderi A,

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Abstract Amplification of 8p11-12 is a well-known alteration in human breast cancers but the driving oncogene has not been identified. We have developed a high-resolution comparative genomic hybridization array covering 8p11-12 and analysed 33 primary breast tumors, 20 primary ovarian tumors and 27 breast cancer cell lines. Expression analysis of the genes in the region was carried out by using real-time quantitative PCR and/or oligo-microarray profiling. In all, 24\% (8/33) of the breast tumors, 5\% (1/20) of the ovary tumors and 15\% (4/27) of the cell lines showed 8p11-12 amplification. We identified a 1 Mb segment of common amplification that excludes previously proposed candidate genes. Some of the amplified genes did not show overexpression, whereas for others, overexpression was not specifically attributable to amplification. The genes FLJ14299, C8orf2, BRF2 and RAB11FIP, map within the 8p11-12 minimal amplicon, two have a putative function consistent with an oncogenic role, these four genes showed a strong correlation between amplification and overexpression and are therefore the best candidate driver oncogenes at 8p12. This article was published in Oncogene and referenced in Journal of Carcinogenesis & Mutagenesis

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