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Related Experiment Videos

Magnesium inhibits human platelets

H B Ravn1, S D Kristensen, H Vissinger

  • 1Department of Cardiology, Aarhus University Hospital, Denmark.

Blood Coagulation & Fibrinolysis : an International Journal in Haemostasis and Thrombosis
|March 1, 1996
PubMed
Summary
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Magnesium (Mg) and aspirin (ASA) both inhibit platelet aggregation. This study found that even low, clinically relevant magnesium concentrations significantly reduce platelet activity, with a synergistic effect when combined with ASA.

Area of Science:

  • Cardiovascular Research
  • Hematology
  • Pharmacology

Background:

  • Magnesium (Mg) is known to inhibit arterial thrombus formation.
  • Previous studies showed Mg inhibits platelet aggregation only at high concentrations (> 2 mM).
  • The effect of Mg at clinically relevant concentrations on platelet activity is not well understood.

Purpose of the Study:

  • To investigate the in vitro effects of magnesium sulfate (MgSO4) on platelet aggregation at clinically relevant concentrations (0.5-8.0 mM).
  • To evaluate the impact of MgSO4 on platelet aggregation in the presence or absence of acetylsalicylic acid (ASA).

Main Methods:

  • In vitro study using platelet-rich plasma (PRP) from healthy volunteers.
  • Platelets were incubated with varying concentrations of MgSO4 (0.5-8.0 mM) or saline.

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  • Platelet aggregation was stimulated using collagen or adenosine diphosphate (ADP).
  • Volunteers ingested ASA 1 hour before blood sampling on a separate day to assess combined effects.

    • Main Results:

    • A dose-dependent inhibition of platelet aggregation was observed with MgSO4.
    • Significant inhibition (P < 0.05) occurred at MgSO4 concentrations as low as 0.5-1.0 mM.
    • MgSO4's inhibitory effect was independent of prior ASA administration.
    • A synergistic inhibitory effect on platelet aggregation was demonstrated when MgSO4 and ASA were used together, especially under maximal collagen stimulation.

    Conclusions:

    • Clinically relevant concentrations of MgSO4 demonstrate a dose-dependent inhibition of platelet aggregation.
    • Magnesium's antiplatelet effect is present even at low concentrations and is independent of ASA.
    • Concomitant administration of MgSO4 and ASA exhibits a synergistic antiplatelet effect.