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Related Experiment Videos

C-peptide makes a comeback.

John Wahren, Hans Jörnvall

    Diabetes/Metabolism Research and Reviews
    |September 3, 2003
    PubMed
    Summary
    This summary is machine-generated.

    Proinsulin C-peptide, once thought inactive, is now recognized as bioactive. It demonstrates therapeutic potential by ameliorating diabetes complications and improving tissue blood flow in studies.

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    Area of Science:

    • Endocrinology
    • Molecular Biology
    • Physiology

    Background:

    • Proinsulin C-peptide was historically considered biologically inert.
    • Emerging research indicates C-peptide possesses significant molecular and physiological activities.

    Discussion:

    • C-peptide replacement therapy in type 1 diabetes models and patients shows promise in mitigating kidney and nerve damage.
    • It enhances blood flow to critical tissues like skeletal muscle, myocardium, skin, and nerves.
    • Mechanisms involve stimulation of Na+,K(+)-ATPase and endothelial nitric oxide synthase (eNOS).

    Key Insights:

    • C-peptide binds to cell membranes, suggesting specific receptor interactions.
    • Intracellular effects include calcium influx and MAP-kinase pathway activation.

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  • Evidence points towards G-protein-coupled receptor involvement and potential synergy with insulin signaling.

    • Outlook:

    • C-peptide is conclusively biologically active, though its precise mechanisms require further elucidation.
    • Clinical evaluation of C-peptide replacement therapy is warranted to assess its potential in preventing long-term diabetic complications.