Abstract
Caveolin-1 and CD36 are plasma membrane fatty acid binding proteins that participate in adipocyte fatty acid uptake and metabolism. Both are associated with cholesterol-enriched caveolae/lipid rafts in the plasma membrane that are important for long chain fatty acid uptake. Depletion of plasma membrane cholesterol reversibly inhibited oleate uptake by adipocytes without altering the amount or the cell surface distribution of either caveolin-1 or CD36. Cholesterol levels thus regulate fatty acid uptake by adipocytes via a pathway that does not involve altered cell surface localization of caveolin-1 or CD36.
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