RAW264.7 cells are co-incubated with oxLDL (20 μg/mL) and Nagilactone B (0.02, 0.1, and 0.5 μM) for 24 h. Oil Red O (ORO) staining reveals significant lipid accumulation and Foam cell formation in RAW264.7 cells following oxLDL treatment. Nagilactone B (NLB) significantly ameliorates intracellular lipid accumulation. ORO positive areas are reduced by 30.05±7.49 (P<0.01), 47.25±5.39 (P<0.001), and 48.65± 7.44% (P<0.001) in Nagilactone B (0.02, 0.1, and 0.5 μM)-treated groups, respectively. The effects of Nagilactone B are evaluated ton cholesterol efflux. Nagilactone B (0.02, 0.1, and 0.5 μM) markedly promotes cholesterol efflux to extracellular apolipoprotein AI (apoA-I) and high density lipoprotein (HDL) with maximal 5.72- (P<0.05) and 2.34-fold (P<0.01), respectively.
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