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Mammary carcinomas in WAP-SV40 transgenic mice [gene expression]

ABSTRACT: Transgenic expression in mice of two synergistically acting SV40 early region encoded proteins, large (LT) and small (sT) tumor antigens, in the mammary epithelium recapitulates loss of p53 and Rb function and deregulation of PP2A-controlled mitogenic pathways in human breast cancer. In primiparous mice, WAP-promoter driven expression of SV40 proteins induces well and poorly differentiated mammary adenocarcinomas. We performed a correlative aCGH and gene expression analysis of 25 monofocal tumors, representing four histopathological grades, to explore the molecular traits of SV40-induced mammary tumors and to emphasize the relevance of this tumor model for human breast tumorigenesis. Gene expression analysis of 25 mammary carcinoma samples of two different WAP-SV40 mouse lines, T1 and NP8. Three involuted mammary gland tissues were included in the study as reference samples.

ORGANISM(S): Mus musculus

SUBMITTER: Thomas Streichert 

PROVIDER: E-GEOD-29117 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Mammary carcinomas developing in SV40 transgenic WAP-T mice arise in two distinct histological phenotypes: as differentiated low-grade and undifferentiated high-grade tumors. We integrated different types of information such as histological grading, analysis of aCGH-based gene copy number and gene expression profiling to provide a comprehensive molecular description of mammary tumors in WAP-T mice. Applying a novel procedure for the correlation of gene copy number with gene expression on a globa  ...[more]

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