Inflammatory myopathies

Peripheral blood immunophenotypic diversity in patients with anti-MDA5+ dermatomyositis and its impact on prognosis

Clin Exp RheumatolPublished Retrospective cohort study

Authors' conclusion

Lymphocytes and their subsets were significantly altered in anti-MDA5+ DM patients. There was remarkable heterogeneity of lymphocyte subsets in anti-MDA5+ DM patients between survivors and non-survivors. Anti-MDA5+ DM patients were divided into two groups with distinct symptoms and survival rate by cluster analysis based on lymphocyte subsets.

Study context

Population
Patients with anti-MDA5+ DM and gender-age matched healthy controls (HCs)
Participants
268 / 536 / 125 / 143
Exposure
Anti-MDA5+ DM vs matched HCs; cluster 1 vs cluster 2
  • Anti-MDA5+ DMn = 268
  • HCsn = 536reference
  • Cluster 1n = 125
  • Cluster 2n = 143reference
Outcome
Peripheral blood lymphocyte subsets and clusters
Methodological detailsgender-age matched healthy controls, cluster analysis based on peripheral blood lymphocyte subsets
  • Gender-age matched healthy controls
  • Cluster analysis based on peripheral blood lymphocyte subsets

Main finding

As reported in the abstract

RP-ILD rate, 3-month and 6-month death rate dramatically higher in cluster 1 than cluster 2
p<0.001, respectively

Observational data: associations, not effects.

Original publication

Peripheral blood immunophenotypic diversity in patients with anti-MDA5+ dermatomyositis and its impact on prognosis. Clin Exp Rheumatol. Published 4 May 2025. doi:10.55563/clinexprheumatol/qumg88

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