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On the oncodevelopmental role of human imprinted genes

H Biran1, I Ariel, N De Groot

  • 1Department of Biochemistry, Hebrew University, Jerusalem, Israel.

Medical Hypotheses
|August 1, 1994
PubMed
Summary

Genome imprinting, crucial for mammalian development, involves genes like H19 and IGF2. Aberrant expression of these imprinted genes is observed in various cancers, suggesting a potential causative role in tumorigenesis.

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Area of Science:

  • Developmental Biology
  • Cancer Genetics
  • Epigenetics

Background:

  • Genome imprinting is vital for mammalian embryonic development, regulating specific gene expression patterns.
  • Imprinted genes, such as paternally expressed H19 and maternally expressed IGF2, show tissue-specific expression during fetal development.
  • Dysregulation of imprinted genes is increasingly recognized in various malignant disorders.

Purpose of the Study:

  • To investigate the role of imprinted genes in cancer development and progression.
  • To explore the oncodevelopmental expression patterns of imprinted genes in neoplasms.
  • To hypothesize a potential causative role for imprinted genes in tumorigenesis.

Main Methods:

  • Analysis of imprinted gene expression in fetal tissues and various malignant disorders.

Related Experiment Videos

  • Examination of imprinted gene expression in specific pediatric neoplasms (Wilm's tumor, rhabdomyosarcoma) and invasive urothelial cancer.
  • Review of data on allele retention and chromosomal linkage with known oncogenes.

    • Main Results:

    • Imprinted genes exhibit characteristic tissue-specific expression in malignant conditions, mirroring embryonic patterns.
    • H19 and IGF2 expression is frequently observed in pediatric neoplasms and invasive urothelial cancer.
    • Malignant transformation in trophoblastic diseases and ovarian teratomas is associated with imprinting relaxation.

    Conclusions:

    • Imprinted genes display an oncodevelopmental mode of expression, similar to oncofetal proteins.
    • The aberrant expression of imprinted genes in cancer suggests they may not only be markers but also contributors to disease.
    • Further research is warranted to elucidate the causative role of imprinted genes in cancer, potentially linked to chromosome 11 aberrations.