AUTHOR=Ling Gui-Chen , Su Chang , Guo Ying-Ao , Qiu Xia , Liu Jia-Wei , Xiao Min , Xiao Yu-Ya , Yang Shuo , Zhang Jian-Yong , Xie Jing-Jing TITLE=Mycophenolate mofetil after tacrolimus for refractory clinically amyopathic dermatomyositis: a case report JOURNAL=Frontiers in Pharmacology VOLUME=15 YEAR=2024 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2024.1472667 DOI=10.3389/fphar.2024.1472667 ISSN=1663-9812 ABSTRACT=

Dermatomyositis (DM) positive for anti-melanoma differentiation-associated gene 5 (MDA5) antibodies, mainly when linked with rapidly progressive interstitial lung disease (RP-ILD), is considered a refractory disease. Our report describes a critical case of clinically amyopathic dermatomyositis (CADM) with RP-ILD that tested positive for both anti-MDA5 and anti-Ro-52 antibodies. The patient showed a limited response to a combined therapy regimen of prednisone, iguratimod, and tacrolimus. However, after adjunct therapy with mycophenolate mofetil (MMF), the patient’s condition was controlled, his serum KL-6 levels decreased, and anti-MDA5 antibodies became negative. During the 68-week follow-up, the patient’s condition remained stable, with a satisfactory quality of life. This report also discusses the potential role of inflammatory cytokines in the pathophysiology of CADM and RP-ILD. Further research is required to confirm these results and investigate the application of MMF in maintenance therapy for CADM-associated RP-ILD.