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. 1992 Mar;12(3):954-61.
doi: 10.1128/mcb.12.3.954-961.1992.

Induction of mammary tumors by expression of polyomavirus middle T oncogene: a transgenic mouse model for metastatic disease

C T Guy  1 , R D Cardiff, W J Muller
Affiliations

Induction of mammary tumors by expression of polyomavirus middle T oncogene: a transgenic mouse model for metastatic disease

C T Guy et al. Mol Cell Biol. 1992 Mar.

Abstract

The effect of mammary gland-specific expression of the polyomavirus middle T antigen was examined by establishing lines of transgenic mice that carry the middle T oncogene under the transcriptional control of the mouse mammary tumor virus promoter/enhancer. By contrast to most transgenic strains carrying activated oncogenes, expression of polyomavirus middle T antigen resulted in the widespread transformation of the mammary epithelium and the rapid production of multifocal mammary adenocarcinomas. Interestingly, the majority of the tumor-bearing transgenic mice developed secondary metastatic tumors in the lung. Taken together, these results suggest that middle T antigen acts as a potent oncogene in the mammary epithelium and that cells that express it possess an enhanced metastatic potential.

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