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A 54-year-old female was admitted to hospital complaining of oppressive anterior chest pain during exercise. Treadmill exercise ECG testing showed significant ischemic ECG changes, and electron-beam computed tomography demonstrated patchy calcifications in the coronary artery. Coronary angiography revealed a significant stenotic lesion of the right coronary artery. On routine investigations, no classical coronary risk factors were found, although a very high concentration (209 mg/dl) of high-density lipoprotein cholesterol (HDL-C) was detected. The serum concentration of cholesteryl-ester transfer protein (CETP), which plays a central role in the reverse cholesterol transport system, was measured and found to be less than the measurable minimum. The patient showed one of the typical genetic CETP mutations (intone 14 splicing defect), and her lipid profile was improved by administration of probucol for 3 months. A very high concentration of HDL-C with a defect of CETP activity may be a specific biochemical indicator pointing to an increased risk of premature coronary artery disease, and the lipid profile can be improved by use of lipid-lowering drugs.

circulation journal

Effort Angina in a Middle-Aged Woman With Abnormally High Levels of Serum High-Density Lipoprotein Cholesterol A Case of Cholesteryl-Ester Transfer Protein Deficiency