Analysis of the expression of genes in the G3/G4 differentiation pathways compared to those expressed in primary human MB tumors after RNA sequencing from PDOX MB002 (A, B) or mouse tumor #2416 (C, D) after treatment with vehicle, gemcitabine, ribociclib and combination of gemcitabine and ribociclib. (A, C) G3/G4 differentiation score (Mann-Whitney test, gemcitabine + ribociclib versus vehicle). (B, D) Clustering of the tumors with primary human G3 and G4 MB tumors.