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Transforming growth factor-alpha: an oncodevelopmental growth factor.

D S Salomon1, N Kim, T Saeki

  • 1Laboratory of Tumor Immunology and Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892.

Cancer Cells (Cold Spring Harbor, N.Y. : 1989)
|December 1, 1990
PubMed
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Transforming growth factor-alpha (TGF-alpha), a peptide related to epidermal growth factor (EGF), is biologically active in its precursor and peptide forms. This growth factor plays roles in development and adult tissues, potentially acting in autocrine or paracrine signaling.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Biochemistry

Background:

  • Transforming growth factor-alpha (TGF-alpha) is a mitogenic peptide structurally related to epidermal growth factor (EGF).
  • TGF-alpha is synthesized as a glycosylated, membrane-associated precursor.
  • Both the precursor and mature TGF-alpha peptide exhibit biological activity.

Purpose of the Study:

  • To describe the structural and functional characteristics of TGF-alpha.
  • To investigate the biological activity of TGF-alpha and its precursor.
  • To explore the role of TGF-alpha in cellular growth and development.

Main Methods:

  • Analysis of TGF-alpha structure and synthesis.
  • Assessment of TGF-alpha biological activity in various systems.

Related Experiment Videos

  • Examination of TGF-alpha and EGF receptor coexpression in tumors.
  • Main Results:

    • TGF-alpha is a 50-amino-acid peptide derived from a larger precursor.
    • Both TGF-alpha forms are biologically active and can promote cell transformation.
    • TGF-alpha binds to and activates the EGF receptor.
    • Coexpression of TGF-alpha and EGF receptor suggests autocrine/paracrine roles in tumors.
    • TGF-alpha expression patterns indicate involvement in development and adult tissue functions.

    Conclusions:

    • TGF-alpha is a significant growth factor with roles in cell proliferation and potentially in tumorigenesis.
    • The interaction between TGF-alpha and the EGF receptor is crucial for its function.
    • TGF-alpha's diverse expression suggests broad physiological importance.