Pleiotropic Effects of Statins: The Role of Eicosanoid Production

The 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitors (statins) have potent anti-inflammatory, vasodilatory and anti-platelet effects that are independent of the lipid-lowering effects. These non-lipid-lowering or pleiotropic effects are dependent on HMG-CoA reductase inhibition in tissues other than the liver. In animal models, high-dose statins upregulate cytosolic phospholipase A(2) and cyclooxygenase-2, leading to increased production of prostacyclin and 15-deoxy-PGJ(2). In addition, statins activate protein kinase A, which phosphorylates 5-lipoxygenase, resulting in decreased production of the pro-inflammatory leukotrienes and increased production of 15-epi-lipoxin A4, an eicosanoid with potent anti-inflammatory and inflammation-resolution properties. It is unclear, however, whether these effects occur in the clinical setting and whether these effects (partially) explain the anti-inflammatory effects of statins in patients.