The effects of dexamethasone on transepithelial electrical resistance in the brain microvessel endothelial cells. 1: anti-NR2 antibody (100 μl, 10 μg/ml), 2: positive cerebrospinal fluid (CSF, 100 μl), 3: positive serum (100 μl). The holes with increased permeability in the blood-brain barrier were added by dexamethasone (1 μg), and the TEER was measured after 12 h. Results are averages of 3 independent experiments. Data are represented as mean ±SEM.