(A) IF analysis of IGF1, IGF2 and IGF1R (green) in PDXs sample at 10 weeks time point with no hormone, E2 or E2+P4 treatment. In all color images SMCs are highlighted by ACTA2 (red) and nuclei are stained with Hochest (blue). White arrows, SMCs; yellow arrows, TAFs; and white arrowhead, vascular cells. Quantitative analysis of IF signals: the signal density (B) and the total protein level per SMC (C) were measured in PDXs of no hormone (N=5), E2 (N=4) and E2+P4 (N=6) groups. The statistical significance by Tukey’s HSD Test was indicated as; ns, non-significant; * P < 0.1; ** P < 0.05; and *** P < 0.01.