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Related Experiment Videos

Hyperlipidemia and hemostatic system

E Morishita1, H Jokaji, T Matsuda

  • 1Department of Internal Medicine (III), Kanazawa University, School of Medicine, Japan.

Journal of Atherosclerosis and Thrombosis
|January 1, 1995
PubMed
Summary
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Hyperlipidemia, particularly high triglycerides, elevates plasminogen activator inhibitor (PAI), reducing fibrinolysis and increasing thrombosis risk. Elevated lipoprotein (a) in diabetics also impacts fibrinolysis and tissue plasminogen activator levels.

Area of Science:

  • Biochemistry
  • Hematology
  • Cardiovascular Medicine

Background:

  • Hyperlipidemia is linked to cardiovascular disease, but its precise impact on hemostasis requires further elucidation.
  • Understanding the interplay between lipid profiles and the coagulation/fibrinolytic systems is crucial for assessing thrombotic risk.

Purpose of the Study:

  • To investigate the relationship between hyperlipidemia and the hemostatic system.
  • To explore the effect of hypertriglyceridemia on plasminogen activator inhibitor (PAI) levels.
  • To examine the role of lipoprotein (a) [Lp(a)] in fibrinolysis in diabetic patients.

Main Methods:

  • Measured plasma levels of coagulation and fibrinolytic factors, lipids, thrombin-antithrombin III complex (TAT), and active plasminogen activator inhibitor (PAI) in hyperlipidemic and normolipidemic subjects.

Related Experiment Videos

  • Administered fat emulsion to induce artificial hypertriglyceridemia and monitored PAI and triglyceride levels.
  • Assayed plasma levels of Lp(a), tissue-type plasminogen activator (t-PA) antigen, and PAI activity in diabetic patients and normal controls.

    • Main Results:

    • Hyperlipidemic patients showed elevated prothrombin and factors VII, IX, and X, correlating with triglyceride and total cholesterol levels.
    • Type IIb hyperlipidemia was associated with slightly higher TAT levels, and type IIb and IV hyperlipidemia with significantly higher active PAI levels.
    • Induced hypertriglyceridemia increased PAI and triglyceride levels; elevated Lp(a) and PAI activity, with lower t-PA antigen, were observed in diabetics.

    Conclusions:

    • Hypertriglyceridemia may promote a hypofibrinolytic state by increasing PAI, potentially leading to thrombosis.
    • Elevated Lp(a) in diabetics might impair fibrinolysis by reducing t-PA release, though the mechanism is unclear.