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Related Experiment Videos

Characterization of the equine platelet aggregation response.

K M Meyers, C Lindner, B Grant

    American Journal of Veterinary Research
    |February 1, 1979
    PubMed
    Summary

    Equine platelet aggregation was reliably assessed in vitro using adenosine diphosphate (ADP) and bovine collagen. Other agonists like serotonin and arachidonate showed weaker responses, while epinephrine had no effect.

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    Area of Science:

    • Veterinary Hematology
    • Platelet Physiology
    • Equine Research

    Background:

    • Platelet aggregation is crucial for hemostasis.
    • Understanding equine platelet function is vital for diagnosing and managing bleeding disorders in horses.

    Purpose of the Study:

    • To characterize equine platelet aggregation responses to various agonists.
    • To establish a reliable in vitro method for assessing equine platelet function.

    Main Methods:

    • Equine platelet aggregation was measured using a platelet aggregometer.
    • Platelets were stimulated with bovine collagen, adenosine diphosphate (ADP), serotonin, epinephrine, and arachidonate.
    • Experimental conditions including agonist concentration, anticoagulant, temperature, and sample handling time were evaluated.

    Main Results:

    • Equine platelets showed irreversible aggregation with 10 microM ADP and bovine collagen.
    • Secondary aggregation waves were observed with 1-5 microM ADP in some horses.
    • Serotonin and arachidonate induced weak, reversible aggregation; epinephrine had no effect.
    • Anticoagulant concentration, sample handling time (>4 hours), and influenced aggregation.

    Conclusions:

    • The described method reliably assesses equine platelet aggregation in vitro.
    • ADP and collagen are potent agonists for equine platelet aggregation.
    • Standardized procedures are essential for accurate assessment of equine platelet function.

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