Protein expression and TEER of AAP cells treated with ABCA1 agonist GW3965 for 24 hours. (A) Western blot shows that ABCA1 protein expression was upregulated in the GW3965-treated group compared with the blank and vehicle treated groups (n = 3 cell lines). (B, C) Western blot detected reduced Cav1 and increased eNOS after GW3965 treatment (n = 3 cell lines). (D) Griess assay showed significantly higher NO concentration in the GW3965-treated group than vehicle group control (n = 3 cell lines). (E) TEER of the AAP monolayer declined notably in the GW3965-treated group compared with the vehicle group (n = 4 cell lines). C1, blank; C2, vehicle; C3, GW3965. ***P < 0.001, **P < 0.01, compared with vehicle group, one-way ANOVA. Results are expressed as mean ± standard deviation. GADPH, glyceraldehyde 3-phosphate dehydrogenase.