KDR and glioblastoma: Fourth, the proteome array indicated the expression of VEGF (vascular endothelial growth factor) receptor-1 and -2 in all SLGC lines, with a high abundance of VEGFR-2 in the cases of all GS-derived SLGC lines and three GBM-derived SLGC lines (T1587, T1586, and T1338; S7B Fig).