Abstract
The effect of drugs affecting lipid metabolism on atherosclerosis development/progression may be linked to their activity on the clotting system, i.e. at the platelet, fibrinogen or Fibrinolysis levels. Both resins and HMG CoA reductase inhibitors reduce, over prolonged treatments, platelet sensitivity to major aggregants. This effect seems to occur best with non-liver selective agents (e.g. simvastatin) although recent data cast doubts on the constancy of the effect. A comparative evaluation of different reductase inhibitors has never been carried out. These drugs also reduce the circulating levels of the tissue factor pathway inhibitor (TFPI) carried by LDL, this being a potentially negative effect.
Fibric acids belong to a multifaceted series of “fraudolent” fatty acids, known to interact with a liver nuclear receptor, thus activating fatty acid catabolism. A similar activity may be exerted by n-3 fatty acids, MEDICA 16, thia-fatty acids etc. Among fibric acids, all but gemfibrozil can reduce fibrinogen levels; this last compound can, however, apparently activate Fibrinolysis. Bezafibrate, as well as n-3 fatty acids, also exerts a significant platelet antiaggregatory activity. Anti-oxidants may possibly play a role in controlling platelet activation. Probucol was recently shown to reduce the excretion of thromboxane metabolites in patients with homocystinuria. The complex effect of this molecule may, however, also suggest other mechanisms.
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Colli, S., Sirtori, C.R. (1993). Drugs Affecting Thrombosis and Atherosclerosis. In: Catapano, A.L., Gotto, A.M., Smith, L.C., Paoletti, R. (eds) Drugs Affecting Lipid Metabolism. Medical Science Symposia Series, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1703-6_28
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DOI: https://doi.org/10.1007/978-94-011-1703-6_28
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