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Soluble CD40 Levels in Rheumatoid Arthritis: Association with Serum Cytokines and Autoantibody Status
Valeria Miroslava Limón-López1,2, José Francisco Muñoz-Valle2, Zyanya Reyes-Castillo3
1Doctorado en Ciencias Biomédicas (DCB), Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara 44340, Jalisco, Mexico.
Journal of Clinical Medicine
|August 13, 2026
Summary
Soluble CD40 (sCD40) levels do not indicate rheumatoid arthritis (RA) disease activity or immune response. Further research is needed to understand sCD40
Area of Science:
- Immunology
- Rheumatology
Background:
- The CD40-CD40L axis is crucial in rheumatoid arthritis (RA) pathogenesis.
- The role of soluble CD40 (sCD40) in RA and its relation to inflammatory markers is unclear.
Purpose of the Study:
- To investigate the significance of serum sCD40 levels in RA patients.
- To assess the relationship between sCD40 and disease activity, autoantibodies, and cytokines in RA.
Main Methods:
- Compared sCD40 levels in 62 RA patients and 31 healthy controls.
- Assessed clinical data, disease activity (DAS28-ESR), acute-phase reactants (CRP, ESR), autoantibodies, and cytokines via ELISA and multiplex assays.
- Utilized nonparametric tests and multiple linear regression for analysis.
Main Results:
- Serum sCD40 levels did not differ between RA patients and controls or across RA subgroups.
- No association found between sCD40 and autoantibodies.
- sCD40 correlated positively with age and negatively with IL-2 after age adjustment.
Conclusions:
- Serum sCD40 does not reflect RA disease activity or humoral immune response.
- Further studies should explore sCD40's role in early RA and its impact on cytokine production.
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