(A) Study Setup (B) Total plasma cholesterol levels at time of harvest (C) Total triglyceride (TG) levels in baseline and regression groups before and after the 2 weeks atherosclerosis regression period (D) CETP activity measured in circulation. Cholesterol (E) and triglyceride levels (F) of isolated lipoproteins. N= (B, C) Baseline 26, Lplfl/fl 19, Lpl−/− 18, Lplfl/fl +hCETP 11, Lpl−/− + hCETP 7; (D) Lplfl/fl 8, Lpl−/− 4, Lplfl/fl +hCETP 9, Lpl−/− + hCETP 5; (E, F) Baseline 4, Lplfl/fl 15, Lpl−/− 13, Lplfl/fl +hCETP 10, Lpl−/− + hCETP 6. Data represented as mean ± SEM, * P < 0.05, ** P<0.01, *** P < 0.001, **** P < 0.0001, 1-way ANOVA with Tukey’s multiple comparison test; HDL-C and HDL-TG Welch ANOVA with Games-Howell’s multiple comparison test; VLDL-TG & LDL-TG Kruskal-Wallis Test with Dunn’s multiple comparison test.