ArticleACR open rheumatology2026
Pretreatment Cytokine Signatures as Candidate Biomarkers for JAK Inhibitor Response in Anti-MDA5 Dermatomyositis-Related Interstitial Lung Disease: A Pilot Study.
Article in ACR open rheumatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectiveTo evaluate the clinical characteristics and serum cytokine profiles of patients with anti-MDA5 antibody-positive dermatomyositis with interstitial lung disease (MDA5+ DM-ILD) treated with JAK inhibitors and to compare survivors and nonsurvivors.
methodsSix patients diagnosed with MDA5+ DM-ILD at Nagasaki University Hospital (from 2018 to 2023) were analyzed. All patients received high-dose glucocorticoids, intravenous cyclophosphamide, and plasma exchange. Five patients received calcineurin inhibitors. JAK inhibitors (tofacitinib, n = 3; baricitinib, n = 3) were added to the treatment regimen. Clinical data, including serum ferritin levels, hypoxemia status, and lymphocyte counts, were recorded at initial presentation and during JAK inhibitor treatment. Serum cytokine levels were analyzed using multiplex assays.
resultsThe mean patient age was 66.6 years, and four patients were women. Three patients died within six months of starting JAK inhibitor therapy. Nonsurvivors had higher initial ferritin levels than survivors (mean 3,413 vs 809 ng/mL). Hypoxemia was present in five patients at JAK inhibitor initiation, and four patients had low lymphocyte counts. Serum cytokine analysis revealed elevated levels of granulocyte colony-stimulating factor, interferon-α, interleukin-4, interleukin-13, and CXCL8 in nonsurvivors compared with survivors.
conclusionsSerum cytokine profiles may serve as prognostic markers in patients with MDA5+ DM-ILD treated with JAK inhibitors. The persistent elevation of multiple cytokines in nonsurvivors may reflect inadequate suppression of the cytokine storm despite treatment. Further research is needed to determine the optimal selection and timing of JAK inhibitor therapy.
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