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Related Experiment Videos

Antioncogenes and human cancer

A G Knudson1

  • 1Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA 19111.

Proceedings of the National Academy of Sciences of the United States of America
|December 1, 1993
PubMed
Summary
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Antioncogenes, or tumor suppressor genes, are frequently mutated in most human cancers and predispose individuals to cancer when mutated in the germline. Further research is needed to map and clone additional antioncogenes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Antioncogenes (tumor suppressor genes) function as negative regulators of cell division, contrasting with oncogenes.
  • Mutations in antioncogenes are prevalent in most human cancers, with exceptions like leukemias and lymphomas.
  • Germline heterozygosity for antioncogene mutations strongly predisposes individuals to hereditary cancers.

Purpose of the Study:

  • To review the role of antioncogenes in cancer development.
  • To highlight the cloning and mapping of identified antioncogenes.
  • To discuss the varying mutation frequencies of antioncogenes across different cancer types.

Main Methods:

  • Cloning and mapping of antioncogenes through studies of hereditary cancer families and tumor investigations.

Related Experiment Videos

  • Analysis of antioncogene abnormalities in both hereditary and nonhereditary cancer forms.
  • Comparison of antioncogene mutation frequencies across diverse cancer types.

    • Main Results:

    • Seven antioncogenes have been cloned from studies of individuals with hereditary cancer.
    • An eighth antioncogene was mapped and cloned via tumor investigation.
    • Hereditary cancers are often linked to antioncogene heterozygosity, while nonhereditary cancers may show similar or additional antioncogene abnormalities.

    Conclusions:

    • Antioncogenes play a critical role in regulating cell division and preventing cancer.
    • Further identification and characterization of antioncogenes are essential for understanding cancer etiology.
    • Antioncogene functions span various cellular pathways, including signal transduction and gene expression regulation.