WB of the tumor tissue lysates demonstrated that RA treatment induced apoptosis (Supplementary Figure S4A), inhibited the expression levels of the proliferation marker Ki-67, angiogenesis marker CD-31 (Supplementary Figure S4A), and AKT/mTOR pathway proteins (Figures 9G,H; Supplementary Figures S4B–G). Here, PECAM1 is linked to neoplasm.