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Title: HMGA2 regulates transcription of the Imp2 gene via an intronic regulatory element in cooperation with nuclear factor-kappaB
Authors: Cleynen, Isabelle *
Brants, Jan *
Peeters, Kristel
Deckers, Rob
Debiec-Rychter, Maria
Sciot, Raphael
Van de Ven, Willem ×
Petit, Marleen #
Issue Date: Apr-2007
Series Title: Molecular Cancer Research vol:5 issue:4 pages:363-72
Abstract: IMP2 (insulin-like growth factor-II mRNA binding protein 2) is an oncofetal protein that is aberrantly expressed in several types of cancer. We recently identified the Imp2 gene as a target gene of the architectural transcription factor HMGA2 (high mobility group A2) and its tumor-specific truncated form HMGA2Tr. In this study, we investigated the mechanism via which HMGA2 regulates Imp2 gene expression. We show that HMGA2 and HMGA2Tr directly regulate transcription of the Imp2 gene by binding to an AT-rich regulatory region located in the first intron. In reporter experiments, we show that this AT-rich regulatory region mimics the response of the endogenous Imp2 gene to HMGA2 and HMGA2Tr. Furthermore, we show that a consensus nuclear factor-kappaB (NF-kappaB) binding site located immediately adjacent to the AT-rich regulatory region binds NF-kappaB and that NF-kappaB and HMGA2 cooperate to regulate Imp2 gene expression. Finally, we provide evidence that there is a strong and statistically significant correlation between HMGA2 and IMP2 gene expression in human liposarcomas.
ISSN: 1541-7786
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Clinical Genetics Section (-)
Translational Cell & Tissue Research
Department of Human Genetics - miscellaneous
Translational Research in GastroIntestinal Disorders
Laboratory for Genetics of Malignant Disorders
Laboratory of Angiogenesis and Vascular Metabolism (Vesalius Research Center) (+)
* (joint) first author
× corresponding author
# (joint) last author

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