MMTV-cre;Ccn6 knockout mice develop tumors recapitulating human metaplastic breast carcinomas

Metaplastic breast carcinoma is an aggressive form of invasive breast cancer with histological evidence of epithelial to mesenchymal transition (EMT). However, the defining molecular events are unknown. Here we show that CCN6 (WISP3), a secreted matricellular protein of the CCN (CYR61/CTGF/NOV) fami...

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Veröffentlicht in:Oncogene 2017-04, Vol.36 (16), p.2275-2285
Hauptverfasser: Martin, E E, Huang, W, Anwar, T, Arellano-Garcia, C, Burman, B, Guan, J-L, Gonzalez, M E, Kleer, C G
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container_issue 16
container_start_page 2275
container_title Oncogene
container_volume 36
creator Martin, E E
Huang, W
Anwar, T
Arellano-Garcia, C
Burman, B
Guan, J-L
Gonzalez, M E
Kleer, C G
description Metaplastic breast carcinoma is an aggressive form of invasive breast cancer with histological evidence of epithelial to mesenchymal transition (EMT). However, the defining molecular events are unknown. Here we show that CCN6 (WISP3), a secreted matricellular protein of the CCN (CYR61/CTGF/NOV) family, is significantly downregulated in clinical samples of human spindle cell metaplastic breast carcinoma. We generated a mouse model of mammary epithelial-specific Ccn6 deletion by developing a floxed Ccn6 mouse which was bred with an MMTV-Cre mouse. Ccn6 fl/fl ;MMTV-Cre mice displayed severe defects in ductal branching and abnormal age-related involution compared to littermate controls. Ccn6 fl/fl ;MMTV-Cre mice developed invasive high grade mammary carcinomas with bona fide EMT, histologically similar to human metaplastic breast carcinomas. Global gene expression profiling of Ccn6 fl/fl mammary carcinomas and comparison of orthologous genes with a human metaplastic carcinoma signature revealed a significant overlap of 87 genes ( P =5 × 10 −11 ). Among the shared deregulated genes between mouse and human are important regulators of epithelial morphogenesis including Cdh1, Ck19, Cldn3 and 4, Ddr1, and Wnt10a . These results document a causal role for Ccn6 deletion in the pathogenesis of metaplastic carcinomas with histological and molecular similarities with human disease. We provide a platform to study new targets in the diagnosis and treatment of human metaplastic carcinomas, and a new disease relevant model in which to test new treatment strategies.
doi_str_mv 10.1038/onc.2016.381
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However, the defining molecular events are unknown. Here we show that CCN6 (WISP3), a secreted matricellular protein of the CCN (CYR61/CTGF/NOV) family, is significantly downregulated in clinical samples of human spindle cell metaplastic breast carcinoma. We generated a mouse model of mammary epithelial-specific Ccn6 deletion by developing a floxed Ccn6 mouse which was bred with an MMTV-Cre mouse. Ccn6 fl/fl ;MMTV-Cre mice displayed severe defects in ductal branching and abnormal age-related involution compared to littermate controls. Ccn6 fl/fl ;MMTV-Cre mice developed invasive high grade mammary carcinomas with bona fide EMT, histologically similar to human metaplastic breast carcinomas. Global gene expression profiling of Ccn6 fl/fl mammary carcinomas and comparison of orthologous genes with a human metaplastic carcinoma signature revealed a significant overlap of 87 genes ( P =5 × 10 −11 ). Among the shared deregulated genes between mouse and human are important regulators of epithelial morphogenesis including Cdh1, Ck19, Cldn3 and 4, Ddr1, and Wnt10a . These results document a causal role for Ccn6 deletion in the pathogenesis of metaplastic carcinomas with histological and molecular similarities with human disease. 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Among the shared deregulated genes between mouse and human are important regulators of epithelial morphogenesis including Cdh1, Ck19, Cldn3 and 4, Ddr1, and Wnt10a . These results document a causal role for Ccn6 deletion in the pathogenesis of metaplastic carcinomas with histological and molecular similarities with human disease. We provide a platform to study new targets in the diagnosis and treatment of human metaplastic carcinomas, and a new disease relevant model in which to test new treatment strategies.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>27819674</pmid><doi>10.1038/onc.2016.381</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects 42/41
631/67/1347
64/110
692/53/2421
82/51
Age
Animals
Apoptosis
Breast - pathology
Breast cancer
Breast carcinoma
Breast Neoplasms - genetics
Breast Neoplasms - pathology
CCN Intercellular Signaling Proteins - genetics
Cell Biology
Connective tissue growth factor
CYR61 protein
Disease Models, Animal
E-cadherin
Female
Gene expression
Genes, Tumor Suppressor
Human Genetics
Humans
Internal Medicine
Invasiveness
Male
Mammary gland
Mammary Neoplasms, Animal - pathology
Medicine
Medicine & Public Health
Mesenchyme
Metaplasia - genetics
Mice
Mice, Inbred Strains
Mice, Knockout
Morphogenesis
Oncology
original-article
Rodents
Tumors
title MMTV-cre;Ccn6 knockout mice develop tumors recapitulating human metaplastic breast carcinomas
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