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  • Title: CD36 does not play a direct role in HDL or LDL metabolism.
    Author: de Villiers WJ, Cai L, Webb NR, de Beer MC, van der Westhuyzen DR, de Beer FC.
    Journal: J Lipid Res; 2001 Aug; 42(8):1231-8. PubMed ID: 11483624.
    Abstract:
    CD36 and scavenger receptor class B, type I (SR-BI) are both class B scavenger receptors that recognize a broad variety of ligands, including oxidized low density lipoprotein (oxLDL), HDL, anionic phospholipids, and apoptotic cells. In this study we investigated the role of mouse CD36 (mCD36) as a physiological lipoprotein receptor. We compared the association of various lipoprotein particles with mCD36 and mSR-BI expressed in COS cells by adenovirus-mediated gene transfer. mCD36 bound human oxLDL and mouse HDL with high affinity. Human LDL bound poorly to mCD36, indicating that mCD36 is unlikely to play a significant role in LDL metabolism. The ability of mCD36 to mediate the selective uptake of cholesteryl esters (CE) from receptor-bound HDL was assessed. In comparison with mSR-BI, mCD36 inefficiently mediated the selective uptake of CE. Hepatic overexpression of mCD36 in C57BL/6 mice by adenovirus-mediated gene transfer did not result in significant alterations in plasma LDL and HDL levels. We conclude that mCD36, while able to bind HDL with high affinity, does not contribute significantly to HDL or LDL metabolism.
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