Effects of oral choline treatment on the gene and protein expression levels, respectively, of α7 nAChR (A and B), HIF-1α (C and D), and VEGF (E and F) in the ischemic cerebral cortex. Mean±SEM. n=3. bP<0.05, cP<0.01 vs sham; eP<0.05, fP<0.01 vs pMCAO.