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Related Experiment Videos

Clinical experience with GRF.

M B Ranke

    Acta Paediatrica Scandinavica. Supplement
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    Growth hormone releasing factor (GRF) testing using a 29-residue polypeptide effectively stimulates human growth hormone (hGH) release. This diagnostic tool shows promise for identifying hGH deficiency in children.

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    Area of Science:

    • Endocrinology
    • Molecular Biology
    • Pediatric Medicine

    Background:

    • Growth hormone releasing factor (GRF) regulates pituitary human growth hormone (hGH) production.
    • The N-terminal 29-residue fragment of GRF retains biological activity.
    • GRF plays a crucial role in endocrine system regulation.

    Purpose of the Study:

    • To evaluate the efficacy of a synthetic 29-residue GRF polypeptide in stimulating hGH secretion.
    • To assess the diagnostic utility of GRF testing in children with suspected hGH deficiency.
    • To determine the safety and reliability of GRF stimulation tests.

    Main Methods:

    • Chemical synthesis of the 29 N-terminal residue GRF polypeptide.
    • Administration of synthetic GRF to healthy volunteers and children with various disorders.

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  • Measurement of hGH levels in plasma following GRF administration.
  • Analysis of hGH response patterns in relation to diagnosis.

    • Main Results:

    • Synthetic GRF elicited significant hGH secretion in healthy volunteers, reaching up to 40 ng/ml.
    • Maximum hGH response in children occurred within 60 minutes post-administration.
    • Children with hGH deficiency exhibited markedly lower hGH responses compared to those with other disorders.
    • The GRF stimulation test demonstrated a low frequency of false-positive results.

    Conclusions:

    • The 29-residue GRF polypeptide is a potent stimulator of hGH release.
    • GRF testing is a potentially valuable diagnostic aid for identifying hGH deficiency in pediatric patients.
    • GRF testing offers a reliable method for assessing the pituitary's capacity to release hGH.