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The Ets dominant repressor En/Erm enhances intestinal epithelial tumorigenesis in Apc(Min )mice
BACKGROUND: Ets transcription factors have been widely implicated in the control of tumorigenesis, with most studies suggesting tumor-promoting roles. However, few studies have examined Ets tumorigenesis-modifying functions in vivo using model genetic systems. METHODS: Using mice expressing a previo...
Autores principales: | , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2714157/ https://www.ncbi.nlm.nih.gov/pubmed/19545444 http://dx.doi.org/10.1186/1471-2407-9-197 |
Sumario: | BACKGROUND: Ets transcription factors have been widely implicated in the control of tumorigenesis, with most studies suggesting tumor-promoting roles. However, few studies have examined Ets tumorigenesis-modifying functions in vivo using model genetic systems. METHODS: Using mice expressing a previously characterized Ets dominant repressor transgene in the intestinal epithelium (Villin-En/Erm), we examined the consequences of blocking endogenous Ets-mediated transcriptional activation on tumorigenesis in the Apc(Min )model of intestinal carcinoma. RESULTS: En/Erm expression in the intestine, at levels not associated with overt crypt-villus dysmorphogenesis, results in a marked increase in tumor number in Apc(Min )animals. Moreover, when examined histologically, tumors from En/Erm-expressing animals show a trend toward greater stromal invasiveness. Detailed analysis of crypt-villus homeostasis in these En/Erm transgenic animals suggests increased epithelial turnover as one possible mechanism for the enhanced tumorigenesis. CONCLUSION: Our findings provide in vivo evidence for a tumor-restricting function of endogenous Ets factors in the intestinal epithelium. |
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