Loss of Imprinting in Hepatoblastoma

Shirley Rainier, Craig J. Dobry, Andrew P. Feinberg

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Abstract

We and others have described loss of imprinting (LOI) of the insulinlike growth factor II (IGF2) gene in 70% of Wilms' tumors (WT), an embryonal kidney tumor, and we have also found LOI of the H19 gene in 29% of WTs. In WT, LOI of IGF2 is coupled to down-regulation of H19. LOI of IGF2 has subsequently been described in a second embryonal neoplasm, rhabdomyosarcoma. However, the hypothesis that LOI is a general feature of embryonal tumors is challenged by a report of absence of LOI in three hepatoblastomas (S. M. Davies, Cancer Res., 53: 4781-4783, 1993). We identified five hepatoblastomas informative for a transcribed polymorphism of the IGF2 gene. One tumor showed LOI of IGF2, in contrast to the previous report That tumor also showed LOI of H19, further documenting a role for this gene in imprinting disturbances in cancer. However, in contrast to WT, LOI in hepatoblastoma was not associated with down-regulation of H19. Thus, IGF2 and H19 expression can be uncoupled in tumors with LOI.

Original languageEnglish (US)
Pages (from-to)1836-1838
Number of pages3
JournalCancer Research
Volume55
Issue number9
StatePublished - May 1 1995

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Rainier, S., Dobry, C. J., & Feinberg, A. P. (1995). Loss of Imprinting in Hepatoblastoma. Cancer Research, 55(9), 1836-1838.