A, B, Quantification of lung metastatic progression via bioluminescence imaging of B16F10-TR-shApoe sgCtrl (A) or sgLrp1-1 (B) cells injected via lateral tail vein into APOE2 and APOE4 mice. Representative images of H&E-stained lungs taken from mice at the day 21 endpoint (n = 9–10 mice per group; representative of two independent experiments; two-way ANOVA). C, Number of days after topical 4-OHT administration until tumors were palpated and visualized in BPC/APOE2/LRP1Δ and BPC/APOE4/LRP1Δ mice (n=12 per group). Unpaired t-test. D, Melanoma tumor growth curves of BPC/APOE2/LRP1Δ (n=12) and BPC/APOE4/LRP1Δ (n=10) mice after topical 4-OHT administration. Two-way ANOVA. E, Kaplan-Meier survival curves of BPC/APOE2/LRP1Δ and BPC/APOE4/LRP1Δ mice after topical 4-OHT administration (n=12 per group). Log-rank test. F, Quantification of lung metastatic foci in BPC/APOE2/LRP1Δ (n=6) and BPC/APOE4/LRP1Δ (n=5) mice after neonatal tumor induction. Unpaired t-test. G, Western blot of puromycin incorporation into BPC/APOE2/LRP1Δ and BPC/APOE4/LRP1Δ tumors 35 days after 4-OHT administration (n=3 per group). Non-puromycin-pulsed mice were included as an antibody control. Unpaired t-test.