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Mammalian acyl-CoA:cholesterol acyltransferases
K F Buhman1, M Accad, R V Farese
1Gladstone Institute of Cardiovascular Disease, San Francisco, CA 94141-9100, USA.
Biochimica Et Biophysica Acta
|December 9, 2000
Summary
Cholesterol ester metabolism is regulated by acyl-CoA:cholesterol acyltransferase (ACAT) enzymes. Recent discoveries reveal two ACATs in mammals, clarifying their roles in cholesterol regulation and potential therapeutic applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Cellular Metabolism
Background:
- Cholesterol is a vital sterol in vertebrates, existing as free sterol or cholesterol esters.
- Cholesterol esters are synthesized by acyl-CoA:cholesterol acyltransferase (ACAT) enzymes.
- Significant advancements in understanding cholesterol ester metabolism have occurred recently.
Purpose of the Study:
- To elucidate the functions of ACAT enzymes in cellular cholesterol metabolism.
- To explore the physiological roles of ACAT enzymes.
- To highlight potential therapeutic targets for ACAT inhibitors.
Main Methods:
- Gene cloning of ACAT.
- Biochemical assays to study enzyme activity.
- Cellular and physiological studies on cholesterol metabolism.
Main Results:
- Discovery of two distinct ACAT enzymes in mammalian biology.
- Emerging understanding of ACATs' roles in cellular cholesterol homeostasis.
- Identification of ACAT pathways relevant to human diseases.
Conclusions:
- The two mammalian ACAT enzymes play critical roles in cholesterol metabolism.
- Further research into ACAT functions may lead to novel treatments for hypercholesterolemia and atherosclerosis.
- ACAT inhibitors represent a promising therapeutic strategy.