Cardiac fibrosis is an important cardiac remodeling event in the development of inflammation dilated cardiomyopathy (iDCM). We have previously observed that degradation enhancer of androgen receptor (ASC-J9 (R)) could improve cardiac inflammation and fibrosis. Using Primary CFs, we demonstrated that ASC-J9 (R) attenuates the expression of miR-125b, which subsequently inhibits the generation of collagen. In contrast, overexpressed AR in CFs induced collagen production, increases mir-125b. We also found that inhibition of miR-125b attenuates fibrosis which induced by the overexpression of AR. Our results indentify the functional role for AR as a regulator of cardiac fibrosis due to myocarditis and further show that AR exerts its effect by increasing microRNA-125b expression. Treatment with degradation enhancer of AR limits cardiac fibrosis in iDCM, thereby providing potentially a therapeutic approach for patients with iDCM. (C) 2018 Elsevier Inc. All rights reserved.