SCARB1 and atherosclerosis: Considering the important role of reverse cholesterol reversal (RCT) process in macrophage foaming and atherosclerosis pathology 29, we examined the genes related to RCT including ATP binding cassette transporter A1 (ABCA1), ATP binding cassette transporter G1 (ABCG1), scavenger receptor class B type I (SR-BI), scavenger receptor A (SR-A) and scavenger receptor CD36 in mouse peritoneal macrophages.