RNAs were extracted from cells cultured in normoxia (U87: 20% O2; Glio6: 3% O2) or hypoxia (0.3% O2) for 48 hours. Glio6 cells were cultured either in the presence or absence of serum. RNAs were then processed for transcriptomic analyses.
A: Expression levels are expressed as arbitrary units corresponding to the hybridization signal values obtained with Affymetrix arrays. * p ≤0.05; ** p≤ 0.01; # values below background.
B:RT-qPCR analysis was performed with primers specific for VE-cad, VE-PTP, CD133. Expression levels were normalized relative to the expression level of β-actin. Values are calculated by 2−(Ctgene of interest − Ctbeta actin) * p≤ 0.05; ** p≤0.01.