Differential regulation of the insulin-like growth factor II mRNA-binding protein genes by architectural transcription factor HMGA2

J.R. Brants, T.A.Y. Ayoubi, K. Chada, W.J. van de Ven*, M.M. Petit

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The developmentally regulated architectural transcription factor, high mobility group A2 (HMGA2), is involved in growth regulation and plays an important role in embryogenesis and tumorigenesis. Little is known, however, about its downstream targets. We performed a search for genes of which expression is strongly altered during embryonic development in two HMGA2-deficient mouse strains, which display a pygmy-phenotype, as compared to wild-type mice. We found that the insulin-like growth factor II mRNA-binding protein 2 gene (IMP2), but not its family members IMP1 and IMP3, was robustly downregulated in mutant E12.5 embryos. Furthermore, we show that wild-type HMGA2 and its tumor-specific truncated form have opposite effects on IMP2 expression. Our results clearly indicate that HMGA2 differentially regulates expression of IMP family members during embryogenesis.
Original languageEnglish
Pages (from-to)277-283
JournalFebs Letters
Volume569
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 2004

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