Figure 4. PP2A inhibition abolished E2-mediated inhibition of kinase phosphorylation and VSMC proliferation.
(A) Western blot and quantification of PP2Ac, phosphorylated Akt and phosphorylated ERK. siRNA oligo targeting PP2Ac or non-targeting control was introduced into VSMC followed by E2 and PDGF treatment as described in Figure 2 (n=4). #P<0.05, *P<0.01. VSMC derived from WT mice was treated with vehicle (V) or E2 in the presence or absence of OA (50 nmol/L), and cell proliferation was assessed in each condition cultured with 3% sBGS (B) and PDGF (5 ng/ml) (C) (n=4 per each condition). #P<0.05 vs vehicle.