Sjögren's disease & overlap diseases

Diagnostic potential of soluble and membrane-bound inducible T-cell co-stimulator in Sjögren's disease

Clin Exp RheumatolPublished Diagnostic accuracy study

Authors' conclusion

Soluble ICOS levels and ICOS expression on CD4+ T cells are elevated in SjD patients when they enter diagnostic process.

Study context

Population
Newly diagnosed and established Sjögren's disease (SjD) patients, sicca and healthy controls
Participants
39 / 10 / 30 / 27
Comparison
Newly diagnosed SjD vs established SjD, sicca and healthy controls
  • Newly diagnosed SjDn = 39
  • Established SjDn = 10
  • Siccan = 30reference
  • Healthy controlsn = 27reference
Outcome
Soluble ICOS (serum, ELISA), ICOS on CD4+ and CD8+ T cells and ICOSL on B cells and monocytes (flow cytometry); associations with clinical features and diagnostic potential

Performance

As reported in the abstract

Soluble ICOS and ICOS on CD4+ T cells
  • Soluble ICOS and ICOS on CD4+ T cells significantly elevated in newly diagnosed SjD
  • ROC analysis: strong ability of soluble ICOS and CD4+ T-cell ICOS to differentiate SjD at diagnostic entry from sicca and healthy controls

Further findings

Associations with clinical features

Soluble ICOS positively associated with RF
CD4+ T-cell ICOS positively correlated with gamma globulins and positively associated with anti-Ro antibodies and RF

Original publication

Diagnostic potential of soluble and membrane-bound inducible T-cell co-stimulator in Sjögren's disease. Clin Exp Rheumatol. Published 3 June 2025. doi:10.55563/clinexprheumatol/je5ba0

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