miR-21 genetic ablation exacerbates ALDO/SALT-mediated LV fibrosis and inflammation markers protein expression. miR21KO or WT mice were treated with ALDO/SALT or vehicle for 8 wk, and LV protein levels of Ctgf (A), PAI-1 (B), and Nppa (C) were quantified by Western blot. Results are means ± SE (n = 4). *P < 0.05. ALDO, aldosterone; AU, arbitrary unit; Ctgf, connective tissue growth factor; LV, left ventricle; miR-21, microRNA-21; miR21KO, miR-21 knockout; PAI-1, plasminogen activator inhibitor type 1; WT, wild type.