Objective:To investigate the effects of PCSK9 siRNA on CD36,SR-A1 and SR-B1 expressions in THP-1 derived macrophages.Methods:The siRNA for PCSK9 gene were transfected into THP-1 derived macrophages using positive ion liposome Lipofectamine 2000.Transfection efficiency was assessed by fluorescence microscope assay.The expression of PCSK9 in THP-1 derived macrophages at 24 h after transfection was detected by RT-PCR and Western blot.The most efficient siRNA was selected for transfection.At 24 h after transfection,macrophages were treated with o...