Figure 2.
Real-time RT-PCR analysis of gene expression induced in response to hypoxia or AdCA5. (A) Aliquots of the same 12 RNA preparations used for microarray hybridization (3 different EC primary cultures, 4 experimental conditions) were analyzed by quantitative real-time RT-PCR. For each pair of experimental conditions (ie, 1% O2 vs 20% O2 [H] and AdCA5 vs AdLacZ [C]) the fold induction of VEGF, PTGIS, and EDN1 mRNA expression was calculated (“Materials and methods”). The mean and standard error for the 3 independent data sets are shown. (B) ECs were exposed to hypoxia (1% O2) for 0 to 60 hours; total RNA was isolated; and the levels of CXCR4, EPOR, PTGIS, VEGF, and VEGFC mRNA were determined.