Acyl-coenzyme A: cholesterol acyltransferase modulates the generation of the amyloid β-peptide

• Published in: Nature cell biology Vol. 3; no. 10; pp. 905 - 912
• Main Authors: Kovacs, Dora M, Puglielli, Luigi, Konopka, Genevieve, Pack-Chung, Eunju, Ingano, Laura A. MacKenzie, Berezovska, Oksana, Hyman, Bradley T, Chang, Ta Yuan, Tanzi, Rudolph E
• Format: Journal Article
• Language: English
• Published: England Nature Publishing Group 01.10.2001
• Subjects: Alzheimer's disease; Amyloid beta-Peptides - biosynthesis; Amyloid beta-Peptides - metabolism; Amyloid beta-protein; Amyloid beta-Protein Precursor - genetics; Amyloid beta-Protein Precursor - metabolism; Amyloid Precursor Protein Secretases; Animals; Aspartic Acid Endopeptidases; Biomarkers; Cell Fractionation; Cell Line; Cholesterol - genetics; Cholesterol - metabolism; Diagnosis; Endopeptidases - metabolism; Enzyme Inhibitors - pharmacology; Genetic aspects; Humans; Intracellular Membranes - chemistry; Membrane Glycoproteins - metabolism; Membrane Proteins - metabolism; Mice; Mice, Transgenic; Neurons - metabolism; Physiological aspects; Presenilin-1; Pyridines - pharmacology; Risk factors; Sterol O-Acyltransferase - antagonists & inhibitors; Sterol O-Acyltransferase - metabolism; Transferases; United States
• ISSN: 1465-7392; 1476-4679; 1476-4679
• DOI: 10.1038/ncb1001-905

The pathogenic event common to all forms of Alzheimer's disease is the abnormal accumulation of the amyloid beta-peptide (Abeta). Here we provide strong evidence that intracellular cholesterol compartmentation modulates the generation of Abeta. Using genetic, biochemical and metabolic approaches, we found that cholesteryl-ester levels are directly correlated with Abeta production. Acyl-coenzyme A:cholesterol acyltransferase (ACAT), the enzyme that catalyses the formation of cholesteryl esters, modulates the generation of Abeta through the tight control of the equilibrium between free cholesterol and cholesteryl esters. We also show that pharmacological inhibitors of ACAT, developed for the treatment of atherosclerosis, are potent modulators of Abeta generation, indicating their potential for use in the treatment of Alzheimer's disease.