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International Journal Of Bilogical Sciences

.: Home > International Journal Of Bilogical Sciences > 2016 > Volume 12 Number 4 > Kimberly R. Holloway, Vidya C. Sinha, Wen Bu, Michael Toneff, Jie Dong, Yi Peng, Yi Li

Targeting Oncogenes into a Defined Subset of Mammary Cells Demonstrates That the Initiating Oncogenic Mutation Defines the Resulting Tumor Phenotype

Kimberly R. Holloway, Vidya C. Sinha, Wen Bu, Michael Toneff, Jie Dong, Yi Peng, Yi Li
1. Lester & Sue Smith Breast Center, Baylor College of Medicine, Houston, TX, USA; 2. Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA. 3. National Center for International Research of Biological Targeting Diagnosis and Therapy, Guangxi Medical University, Nanning, Guangxi 530021, China; 4. Guangxi Key Laboratory of Biological Targeting Diagnosis and Therapy Research, Guangxi Medical University, Nanning, Guangxi 530021, China. These two authors contributed equally to this work. Corresponding author: Breast Center, BCM600, One Baylor Plaza, Houston, TX 77030. Phone: 713-798-3963. Fax: 713-798-1659. Email: liyi@bcm.edu
Abstract :

Breast cancers exhibit high intertumoral heterogeneity in genetic alterations as well as histopathological and other phenotypic characteristics. The contribution of the initiating oncogenic mutation to tumor phenotype remains controversial, largely due to the technical difficulties in delivering genetic alterations into well-defined subsets of mammary epithelial cells. To examine how different initiating oncogenes drive tumor phenotype, we somatically delivered two oncogenes (ErbB2, PyMT) into a narrow and distinct subset of the mouse mammary epithelium defined by the expression of the progenitor marker keratin 6a (Krt6a), and compared the phenotypes of the resulting mammary tumors. While PyMT-induced tumors were well-differentiated and displayed glandular and papillary features, ErbB2-induced tumors were poorly differentiated and exhibited epithelial-to-mesenchymal transition as well as β-catenin activation. These in vivo data demonstrate that the initiating oncogene plays a key role in driving mammary tumor phenotype

Keywords :
Keratin 6a, PyMT, ErbB2, Breast Cancer, RCAS, tva

Date Deposited : 16 Mar 2016 11:36

Last Modified : 16 Mar 2016 11:36

Official URL: http://www.ijbs.com/v12i4

Volume 12, Number 4, - 2016 , ISSN 1449-2288

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