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Functionally abnormal monocytes in hypercholesterolemia

E Stragliotto1, M Camera, A Postiglione

  • 1Centro E. Grossi Paoletti, Università degli Studi di Milano, Italy.

Arteriosclerosis and Thrombosis : a Journal of Vascular Biology
|June 1, 1993
PubMed
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Monocytes from hypercholesterolemic patients show abnormal function, including altered eicosanoid metabolism and increased adhesion. These cellular changes may contribute to premature atherosclerosis in these individuals.

Area of Science:

  • Immunology
  • Cardiovascular Biology
  • Cell Biology

Background:

  • Hypercholesterolemia is a major risk factor for premature atherosclerosis.
  • Monocytes play a critical role in the inflammatory processes underlying atherosclerosis.

Purpose of the Study:

  • To investigate the functional characteristics of monocytes in patients with type IIa hypercholesterolemia (HC) and familial hypercholesterolemia (FH).
  • To explore the potential link between monocyte dysfunction and the development of atherosclerosis in hypercholesterolemic individuals.

Main Methods:

  • Analysis of eicosanoid generation (prostaglandin E2, 6-ketoprostaglandin F1 alpha, leukotriene B4) in monocytes stimulated with agonists.
  • Assessment of superoxide anion (O2-) generation and monocyte adhesion to glass.

Related Experiment Videos

  • Evaluation of monocyte function in HC and FH patients, including during low-density lipoprotein apheresis.

    • Main Results:

    • Monocytes from HC patients exhibited increased prostaglandin and 6-ketoprostaglandin generation but reduced leukotriene B4 and superoxide anion production.
    • Monocyte abnormalities were comparable in FH patients and persisted even after normalization of plasma cholesterol levels.
    • Monocytes from hypercholesterolemic patients showed an increased ability to adhere to glass.

    Conclusions:

    • Patients with hypercholesterolemia possess functionally abnormal monocytes.
    • These monocyte dysfunctions, including altered eicosanoid metabolism and enhanced adhesion, may contribute to the accelerated atherosclerosis observed in these patients.