However, similar to what was observed in single Abcg1-deficiency, BMT from donor Abca1−/−Abcg1−/− mice into recipient Ldlr−/− mice led to conflicting results and did not help to elucidate the role of macrophage Abcg1 in atherosclerosis [92,93]. This evidence concerns the gene LDLR and atherosclerosis.