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Increased platelet aggregation induced by glucagon administration.

S J Proctor, T F Davies, A Oxley

    Acta Haematologica
    |January 1, 1980
    PubMed
    Summary
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    Glucagon significantly boosts adenosine diphosphate (ADP)-induced platelet aggregation in salicylate-treated individuals. This finding suggests glucagon may contribute to the link between high glucagon levels, platelet activity, and vascular disease.

    Area of Science:

    • Biochemistry
    • Hematology
    • Endocrinology

    Background:

    • Salicylate therapy is known to inhibit platelet aggregation.
    • The role of glucagon in platelet function, particularly in the context of salicylate use, requires further elucidation.

    Purpose of the Study:

    • To investigate the effect of intravenous glucagon on platelet aggregation in individuals pre-treated with salicylate.
    • To determine if glucagon influences adenosine diphosphate (ADP)-induced platelet aggregation.

    Main Methods:

    • Twelve healthy subjects received salicylate therapy.
    • Platelet aggregation was measured in response to collagen and ADP 18 hours post-salicylate administration.
    • Intravenous glucagon (1 mg) was administered, and its effect on ADP-induced primary aggregation was assessed.

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    Main Results:

    • Subjects showed inhibited collagen-induced secondary aggregation but normal ADP-induced primary aggregation after salicylate treatment.
    • Administration of glucagon resulted in a significant increase in ADP-induced primary platelet aggregation.
    • Glucagon enhances platelet reactivity to ADP.

    Conclusions:

    • Glucagon increases platelet reactivity to adenosine diphosphate (ADP).
    • This effect may explain the clinical observation linking elevated plasma glucagon, heightened platelet aggregation, and vascular disease.