Loss of imprinting of IGF2 is linked to reduced expression and abnormal methylation of H19 in Wilms' tumour

Marja J.C. Steenman, Shirley Rainier, Craig J. Dobry, Paul Grundy, Isabelle L. Horon, Andrew P. Feinberg

Research output: Contribution to journalArticle

Abstract

The insulin–like growth factor–II (IGF2) and H19 genes are imprinted in mouse and human, with expression of the paternal IGF2 and maternal H19 alleles. IGF2 undergoes loss of imprinting (LOI) in most Wilms' tumours (WT). We now show that: (i) LOI of IGF2 is associated with a 80–fold down regulation of H19 expression; (ii) these changes are associated with alterations in parental–origin–specific, tissue–independent sites of DNA methylation in the H19 promoter; and (iii) loss of heterozygosity is also associated with loss of H19 expression. Thus, imprinting of a large domain of the maternal chromosome results in a reversal to a paternal epigenotype. These data also suggest an epigenetic mechanism for inactivation of H19 as a tumour suppressor gene.

Original languageEnglish (US)
Pages (from-to)433-439
Number of pages7
JournalNature genetics
Volume7
Issue number3
DOIs
StatePublished - Jul 1994

ASJC Scopus subject areas

  • Genetics

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