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Haemostatic function and platelet polyunsaturated fatty acids in Eskimos

J Dyerberg, H O Bang

    Lancet (London, England)
    |September 1, 1979
    PubMed
    Summary

    Eskimos consuming omega-3 fatty acids have reduced platelet aggregation, leading to longer bleeding times. This dietary shift may lower the risk of thrombotic disorders like heart attacks.

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    Area of Science:

    • Cardiovascular Health
    • Lipid Metabolism
    • Hemostasis

    Background:

    • Cardiovascular disease mortality is notably low in Eskimo populations.
    • Dietary habits, particularly high omega-3 fatty acid intake, are hypothesized to influence this.
    • Investigating hemostasis provides insight into cardiovascular protective mechanisms.

    Purpose of the Study:

    • To compare hemostatic parameters between Greenland Eskimos and Danish controls.
    • To analyze platelet lipid composition in relation to dietary omega-3 fatty acids.
    • To explore the potential cardioprotective effects of omega-3 polyunsaturated fatty acids.

    Main Methods:

    • Platelet lipid analysis was performed on Greenland Eskimos and Danish controls.
    • Bleeding times and platelet aggregation were measured.
    • Dietary intake of omega-3 polyunsaturated fatty acids, including eicosapentaenoic acid (C20:5), was assessed.

    Main Results:

    • Eskimos exhibited a higher proportion of omega-3 polyunsaturated fatty acids in their platelets.
    • Significantly longer bleeding times were observed in the Eskimo group.
    • Platelet aggregation was reduced in Eskimos compared to controls.

    Conclusions:

    • High omega-3 fatty acid consumption alters platelet composition and function.
    • Eicosapentaenoic acid (C20:5) in platelets may be converted to prostacyclin, inhibiting platelet aggregation.
    • Dietary substitution of arachidonic acid with eicosapentaenoic acid could reduce thrombotic event incidence.

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