A, Immunofluorescent staining of Ki-67 in organotypic explants before and after treatment with RO. B, Quantification of Ki-67+ nuclei in patient explants before and after drug treatment (n=4). C, Cell viability in tumor explants treated with RO4929097, RT and TMZ, and the triple combination, as measured by CellTiter Glo Luminescent Assay (n=5). D, FACS-Analysis of cd133+ cells in tumor explants after drug treatment (n=5). (Ctrl = control, RO = RO4929097, RT = radiotherapy, TMZ = temozolomide; *p<0.05).