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Antiatherogenic effects of calcium-channel blockers: Possible mechanisms of action

  • Nifedipine and Atherogenesis
  • Published:
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Summary

Calcium-channel blockers (Ca blockers), such as nifedipine, verapamil, diltiazem, flunarizine, and their respective derivatives, have been reported to suppress the formation of arterial lesions in animals fed atherogenic diets. The fact that structurally unrelated Ca blockers exert similar antiatherogenic effects may suggest that the drugs act by a calcium-channel-dependent mechanism. However, in cell culture experiments in which putative antiatherosclerotic effects were observed only in the presence of a very high drug concentration (>10 μM), calcium-channel-independent mechanisms are likely. It does not appear that Ca blockers act predominantly by altering coronary risk factors such as arterial pressure or hypercholesterolemia. On the other hand, current evidence is accumulating that Ca blockers may act by suppressing chemotaxis and the proliferation of cells involved in lesion formation. Recent reports indicate that relatively low concentrations (<1 μM) of nifedipine may promote the release of cholesterol from fat-laden smooth cells and macrophages. Controlled clinical trials are needed to determine whether Ca blockers have utility in the prevention of the progression of atherosclerosis in humans.

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  1. Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Suite 513E, 77030, Houston, TX, USA

    Philip D. Henry MD (Professor of Medicine)

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Henry, P.D. Antiatherogenic effects of calcium-channel blockers: Possible mechanisms of action. Cardiovasc Drug Ther 4 (Suppl 5), 1015–1020 (1990). https://doi.org/10.1007/BF02018310

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