The pea3 subfamily ets genes are required for HER2/Neu-mediated mammary oncogenesis
| Autor: | Trevor G. Shepherd, Michelle R. Szrajber, William J. Muller, John A. Hassell, Lisa Kockeritz |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Genetically modified mouse
Subfamily Receptor ErbB-2 Transgene Mammary gland Gene Expression Mice Transgenic Biology medicine.disease_cause General Biochemistry Genetics and Molecular Biology HER2/neu Mice Chlorocebus aethiops medicine Tumor Cells Cultured Animals Humans Gene Mice Knockout Agricultural and Biological Sciences(all) Biochemistry Genetics and Molecular Biology(all) ETS transcription factor family Mammary Neoplasms Experimental Molecular biology body regions DNA-Binding Proteins Tumor Virus Infections medicine.anatomical_structure Mammary Tumor Virus Mouse COS Cells Cancer research biology.protein Female General Agricultural and Biological Sciences Carcinogenesis Retroviridae Infections Transcription Factors |
| Zdroj: | Current biology : CB. 11(22) |
| ISSN: | 0960-9822 |
| Popis: | Background: The PEA3 Ets transcription factor is overexpressed in the vast majority of human breast tumors and in nearly all of those of the HER2/Neu-positive subclass. PEA3 is also overexpressed in various transgenic mouse models of this disease. Whether PEA3 plays an essential role in HER2/Neu-mediated oncogenesis has heretofore not been addressed. Results: Here, we report that each of the three highly related ets genes of the pea3 subfamily ( pea3 , er81 , and erm ) were coordinately overexpressed in mammary tumors of MMTV- neu transgenic mice. Other ets genes normally expressed in the mammary gland were not upregulated in these tumors. Expression of a dominant-negative pea3 transgene under the control of the MMTV promoter in mammary epithelial cells of MMTV -neu transgenic mice dramatically delayed the onset of mammary tumors and reduced the number and size of such tumors in individual mice. Those tumors that arose in bitransgenic mice expressed the MMTV -neu transgene, but not the MMTV-dominant-negative pea3 transgene. Conclusions: These findings imply that one or more of the PEA3 subfamily Ets proteins or other Ets proteins with related DNA binding specificity play an essential role in Neu-mediated mammary oncogenesis. Hence, agents that inhibit the expression or activity of the PEA3 subfamily proteins may prove efficacious in the treatment of breast cancer. |
| Databáze: | OpenAIRE |
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