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Chylomicron-like particles in severe hypertriglyceridemia.

M Aviram, Y Sechter, J G Brook

    Lipids
    |April 1, 1985
    PubMed
    Summary
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    Diabetic patients with severe hypertriglyceridemia have abnormal liver-derived lipoproteins, not intestinal ones. These particles increase platelet activity, suggesting a distinct origin for abnormal lipid transport.

    Area of Science:

    • Biochemistry
    • Lipid Metabolism
    • Clinical Medicine

    Background:

    • Severe hypertriglyceridemia and turbid plasma are common in diabetic patients.
    • Understanding the origin of abnormal lipoproteins is crucial for managing lipid disorders.

    Purpose of the Study:

    • To investigate the origin of triglyceride-rich lipoproteins in a diabetic patient with severe hypertriglyceridemia.
    • To compare these lipoproteins with those in type V hyperlipoproteinemia and normal subjects.

    Main Methods:

    • Lipoprotein electrophoresis and ultracentrifugation of patient plasma.
    • Analysis of apolipoprotein B-48 and B-100 presence.
    • Platelet aggregation assays with different lipoprotein fractions.

    Main Results:

    Related Experiment Videos

    • The patient's plasma lacked a chylomicron band but showed increased pre-beta-lipoproteins.
    • These pre-beta-lipoproteins contained predominantly apolipoprotein B-100 (liver origin), unlike type V hyperlipoproteinemia or normal subjects (intestinal origin).
    • Patient-derived lipoproteins enhanced platelet aggregation, while those from normal or type V subjects decreased it.

    Conclusions:

    • The study suggests that triglyceride-rich, cholesterol-poor lipoproteins in this diabetic patient are of hepatic, not intestinal, origin.
    • These abnormal lipoproteins may contribute to increased platelet activity.
    • This finding has implications for understanding and treating severe hypertriglyceridemia in diabetes.