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[Growth hormone receptors].

M C Postel-Vinay1

  • 1INSERM U.30 Unité de Recherches en Biologie et Pathologie de la Croissance et du Développement, Hôpital des Enfants-Malades, Paris.

Annales D'Endocrinologie
|January 1, 1989
PubMed
Summary
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The proliferative and antiapoptotic actions of growth hormone and insulin-like growth factor-1 are mediated through distinct signaling pathways in the Pro-B Ba/F3 cell line.

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Growth hormone (GH) receptors are crucial for growth regulation. Research is needed to understand GH receptor gene regulation and signaling mechanisms for treating growth defects.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Biochemistry

Context:

  • Growth hormone (GH) exerts its effects via specific receptors found in various tissues.
  • The rabbit liver GH receptor has been purified, sequenced, and cloned, revealing a 620-amino acid polypeptide with a single transmembrane domain.
  • The extracellular hormone-binding domain of the GH receptor is identical to the serum binding protein sequence.

Purpose:

  • To elucidate the structure and function of the GH receptor.
  • To investigate the intra-cellular signaling mechanisms of GH receptor activation.
  • To explore the regulation of GH receptor gene expression and identify potential multiplicity of GH receptors.

Summary:

  • The rabbit liver GH receptor is a well-characterized protein, but its intracellular signaling pathway remains unknown.

Related Experiment Videos

  • Significant changes in GH receptor numbers are observed during growth defects in rats, indicating a role in growth regulation.
  • Both GH and insulin are implicated in regulating GH receptor sites, though the precise mechanisms require further clarification.

    • Impact:

    • Understanding GH receptor multiplicity and regulation is essential for developing targeted therapies for growth disorders.
    • Further studies using monoclonal antibodies and cDNA cloning will clarify GH receptor function and potential therapeutic targets.
    • This research contributes to the fundamental understanding of hormone-receptor interactions and cellular signaling pathways.