Inflammatory myopathies

Neutrophil and mononuclear leukocyte pathways and upstream regulators revealed by serum proteomics of adult and juvenile dermatomyositis

Arthritis Res TherPublished Mechanistic study

Authors' conclusion

Coordinate analysis of protein expression in DM and JDM patient sera by a multiplex immunoassay validated previous gene expression studies and identified novel dysregulated proteins, altered signaling pathways, and candidate disease activity biomarkers.

Study context

Population
Active adult DM and JDM patients and matched healthy controls
Comparison
Active adult DM and JDM patients vs matched healthy controls
  • DMn = 17
  • JDMn = 17
Outcome
Differentially regulated serum proteins, altered pathways and candidate disease activity biomarkers
Methodological detailscase–control, multiplex immunoassay, matched healthy controls
  • Case–control
  • Multiplex immunoassay
  • Matched healthy controls

Main finding

As reported in the abstract

Differentially expressed serum proteins vs healthy controls
Proteins differentially expressed in DM and JDM sera (of 172)
78
Proteins differentially expressed in DM
48
Proteins differentially expressed in JDM
32
Proteins differentially expressed in both DM and JDM
14
Additional differentially expressed proteins after combining DM and JDM cohorts
12

Further findings

Proteins correlating with global, muscle and/or skin disease activity

Proteins correlating in DM
22
Proteins correlating in JDM
24
Proteins correlating in both DM and JDM
7
IL1RL1 candidate global disease activity biomarker in DM and JDM

Original publication

Neutrophil and mononuclear leukocyte pathways and upstream regulators revealed by serum proteomics of adult and juvenile dermatomyositis. Arthritis Res Ther. Published 11 November 2024. doi:10.1186/s13075-024-03421-7

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