Deregulation of both imprinted and expressed alleles of the insulin–like growth factor 2 gene during β–cell tumorigenesis
- 1 June 1995
- journal article
- Published by Springer Nature in Nature Genetics
- Vol. 10 (2) , 196-201
- https://doi.org/10.1038/ng0695-196
Abstract
In a mouse model of multistage carcinogenesis elicited by the SV40 large T-antigen (Tag) oncogene in pancreatic beta cells, the gene for insulin-like growth factor IGF2 is focally up-regulated and functionally implicated in tumour development. The IGF2 gene is differentially regulated in normal tissues: the paternal allele is transiently expressed during embryogenesis, whereas the maternal allele is genomically imprinted and inactive. Crossbred mice carrying the Tag oncogene and a disruption of either the paternal or maternal allele of IGF2 reveal that both alleles are co-activated early during tumour development, and that each contributes to malignant hyperproliferation and consequent tumour volume.Keywords
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