Figure 4. Real-time quantitative PCR was performed to detect the expression of eNOS, NO, ACE, ET and vWF in endothelial cells. Abbreviations: EC: endothelial cells; AS: astrocyte. *p < 0.05, vs. EC group, #p < 0.05, vs. EC + AS group, &p < 0.05, vs. EC + Aβ42 group, $p < 0.05, vs. EC + AS + Aβ42 group, @p < 0.05, vs. EC + AS + Aβ42 + scramble group.