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Related Experiment Videos

Insulin as a growth factor.

D J Hill, R D Milner

    Pediatric Research
    |September 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Insulin acts as a growth factor by stimulating cell replication through insulin and insulin-like growth factor (IGF) receptors. Optimizing diabetes control in children improves growth and IGF levels.

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    Area of Science:

    • Endocrinology
    • Cell Biology
    • Molecular Biology

    Background:

    • Insulin is a potent mitogen, stimulating cell replication in various cell types.
    • Supraphysiological insulin concentrations are needed for connective/musculoskeletal tissue growth via the type I IGF receptor.
    • Insulin stimulates growth in hepatocytes, embryonal carcinoma, and mammary tumor cells via the high-affinity insulin receptor.

    Purpose of the Study:

    • To investigate the role of insulin as a growth factor in vivo.
    • To explore the mechanisms by which insulin influences cell proliferation.
    • To examine the relationship between insulin, IGFs, and growth in diabetes.

    Main Methods:

    • In vitro cell culture studies.
    • Analysis of insulin and IGF receptor binding affinities.

    Related Experiment Videos

  • Investigation of intracellular signaling pathways, including protein phosphorylation.
  • In vivo studies examining growth and hormone levels in diabetic models and children.

    • Main Results:

    • Insulin promotes cell growth by binding to both insulin receptors and type I IGF receptors.
    • Both receptor systems activate intracellular phosphorylation cascades.
    • Insulin synergizes with other growth factors to advance cell cycle progression.
    • Impaired insulin secretion in diabetes is linked to poor growth and reduced IGF levels.

    Conclusions:

    • Insulin functions as a critical growth factor in vivo.
    • Dysregulation of insulin action or secretion significantly impacts growth.
    • Optimizing glycemic control in diabetic children enhances growth and IGF levels, highlighting the interplay between insulin, IGFs, and somatic growth.