Aim:To investigate the protective effect of high density lipoprotein 3(HDL3)onoxidized low density lipoprotein(ox-LDL)-induced apoptosis in RAW264.7 cells,Methods:RAW264.7 cells were exposed to 50 mg/L ox-LDL for various durationsup to 48h,and apoptosis was detected using Hoechst 33258 staining and flowcytometric analysis.Total cholesterol levels were detected by high performanceliquid chromatography,cholesterol efflux was determined by Tritium labeling,andthe cellular lipid droplets were assayed by oil red O staining.Results:Treatmentwith...