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Lipid-lowering strategies, particularly with statins, have been extremely useful in the prevention of cardiovascular disease. However, many patients who receive statin monotherapy do not achieve the desired cardiovascular benefits. Accumulation of cholesteryl esters within macrophages constitutes the hallmark of foam cells during atherogenesis. The action of acyl-coenzyme A (CoA): cholesterol acyltransferase (ACAT) leads to formation of cholesterol esters. There are two different ACAT isoforms: ACAT1 and ACAT2. A considerable interest to develop ACAT inhibitors has been emerging. This review has been focused on the current knowledge about a new ACAT inhibitor, F12511 or eflucimibe, and more particularly on its antiatherosclerotic properties. [ABSTRACT FROM AUTHOR]