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The levels of VEGF mRNA (A) and BDNF mRNA (B) in cortical cells cultured under normoxic, 1% O2, or 4% O2 conditions. Fold changes were calculated using the ΔΔCt method, and the mRNA levels of VEGF and BDNF were detected by RT-PCR. #p<0.05, ##p<0.01, 4% O2 compared with normoxia; *p<0.05, **p<0.01, 1% O2 compared with normoxia (n = 3).
