Pro-inflammatory cytokines in spondyloarthritis: a case-control study

Area of Science:

• Immunology
• Rheumatology
• Biomarkers

Background:

• Spondyloarthritis (SpA) encompasses a group of inflammatory diseases.
• Identifying reliable biomarkers for SpA diagnosis and understanding disease associations is crucial.

Purpose of the Study:

• To evaluate the diagnostic potential of pro-inflammatory cytokines in differentiating SpA patients from healthy controls.
• To investigate the correlation between cytokine levels and SpA disease activity and structural damage.

Main Methods:

• A case-control study involving 72 SpA patients and 72 matched healthy controls.
• Measurement of serum levels for Interleukin (IL)-1, IL-6, IL-8, IL-17, IL-23, and Tumor Necrosis Factor alpha (TNFα).
• Assessment of disease activity using ASDAS-CRP and BASDAI, and structural damage using BASRI.

Main Results:

• Except for IL-8, all measured cytokines (IL-1, IL-6, TNFα, IL-17, IL-23) were significantly elevated in SpA patients compared to controls.
• IL-17 and IL-23 demonstrated strong discriminative values for SpA diagnosis.
• TNFα levels correlated with disease activity (BASDAI) and structural damage (BASRI).
• Disease activity was linked to longer disease duration and higher IL-6 levels, while structural damage was associated with male gender, longer disease duration, and high disease activity.

Conclusions:

• IL-17 exhibits the highest discriminative ability between SpA patients and healthy individuals.
• These findings suggest IL-17 may serve as a valuable biomarker for the diagnosis of spondyloarthritis.