(A) EAhY endothelial cells stably expressing ERα were treated with scrambled control siRNA or MR siRNA for 48 hours and MR knock down was demonstrated by immunoblotting. (B-C) Cells were treated for 20 minutes with vehicle, 10 nM aldosterone (Aldo), 10 nM estradiol (E2) or E2+Aldo. Ratio of phospho-eNOS to total eNOS was quantified by immunoblotting: (B) in control cells with MR or (C) with MR knock down. *p<0.05, **p<0.01, ****p<0.0001, N=3, one-way ANOVA with Bonferroni post hoc.