Technical validation of microarray data by quantitative RT-PCR (QRT-PCR). Average Log2 expression of relative mRNA copy numbers derived from three replicate microarray experiments and QRT-PCR of migratory (rim) over stationary (core) glioma cells (error bars = SD). Concordance between directionality of differential regulation between migratory and stationary cells for microarray and QRT-PCR data is displayed in parentheses (CYR61 = cystein rich 61, CTGF = connective tissue growth factor, RRAS2 = related RAS viral oncogene homolog 2, RhoA = ras homolog gene family member A, PCAF = p300/CBP-associated factor, ITM2B = integral membrane protein 2B, ZNF436 = zinc finger protein 436, MADH1 = mothers against decapentaplegic homolog 1 (A). Expression pattern of migratory (B) and stationary signatures (C) in comprehensive glioma expression data set (NB = normal brain, LGA = low grade astrocytoma, AA = anaplastic astrocytoma, GBM = glioblastoma multiforme). Bar indicates genes significantly (P < 0.05) differentially expressed between tumors and normal brain. Canonical pathways significantly over-represented in migratory (black bars) and stationary signature (white bar) (D).