Analysis of SMC phenotypic markers in PASMCs derived from PAH patients (n = 3–5). PAH-PASMCs were transfected with anti-miR-214 or scrambled control (Scrmb) and lysed for q-RT PCR and Western blot, 72 hrs after transfection. miR-214 antagonism in PAH-PASMCs reversed the expression of MEF2C (A) and LMOD1 (B) comparable to non-PAH controls. (C) Analysis of proliferation in PASMCs derived from PAH patients (n = 3). PAH-PASMCs were transfected with anti-miR-214 or Scrmb and trypsinized for cell cycle analysis 72 hrs after transfection. miR-214 antagonism in PAH-PASMCs significantly inhibited PASMC proliferation. Graphs represent mean ± SEM (*, p<0.05, **, p<0.01, ***, p<0.001).