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Related Experiment Videos

c-ets-2 protooncogene has mitogenic and oncogenic activity.

A Seth1, D K Watson, D G Blair

  • 1Laboratory of Molecular Oncology, National Cancer Institute, Frederick, MD 21701-1013.

Proceedings of the National Academy of Sciences of the United States of America
|October 1, 1989
PubMed
Summary

Overexpression of the c-ets-2 protooncogene in NIH 3T3 cells induced cell transformation and tumor formation. This suggests c-ets-2 has transforming and mitogenic activity, potentially linking it to Down syndrome.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The c-ets-2 protooncogene is a member of the c-ets gene family.
  • Proto-oncogenes play critical roles in cell growth and differentiation.
  • Dysregulation of proto-oncogenes can lead to cellular transformation and cancer.

Purpose of the Study:

  • To investigate the transforming and mitogenic potential of the murine c-ets-2 protooncogene.
  • To determine if c-ets-2 overexpression can induce cellular transformation in NIH 3T3 cells.
  • To explore the potential role of c-ets-2 in the phenotypic changes associated with Down syndrome.

Main Methods:

  • DNA transfection of NIH 3T3 cells with a c-ets-2 expression vector.
  • Morphological analysis of transfected cells grown in low-serum or serum-free conditions.

Related Experiment Videos

  • Northern blot analysis to detect c-ets-2 specific RNA.
  • Western blot analysis using ets-specific antiserum to detect the c-ets-2 protein.
  • Colony formation assays in semisolid medium.
  • Tumorigenicity assays in nude mice.

    • Main Results:

    • Transfected cells formed foci with altered morphology and dense growth, even in serum-free conditions.
    • Analysis confirmed overexpression of c-ets-2 RNA and a 56-kDa protein in foci.
    • Overexpression of c-ets-2 stimulated cell proliferation and removed serum dependency.
    • Transfected cells exhibited anchorage-independent growth and formed tumors in vivo.
    • These findings indicate c-ets-2 possesses transforming and mitogenic activity.

    Conclusions:

    • Overexpression of the c-ets-2 protooncogene can transform NIH 3T3 cells, conferring properties of cancer cells.
    • The c-ets-2 gene demonstrates both transforming and mitogenic activity.
    • The role of c-ets-2 in cell proliferation and its chromosomal location suggest involvement in Down syndrome phenotypes.