Serum defensin levels in patients with systemic sclerosis

Area of Science:

• Immunology
• Rheumatology
• Biochemistry

Background:

• Systemic sclerosis (SSc) is an autoimmune disease with poorly understood mechanisms.
• Associations between antimicrobial peptides (AMPs) and other fibrotic and autoimmune conditions exist.
• The role of AMPs in SSc pathogenesis remains uninvestigated.

Purpose of the Study:

• To investigate serum levels of AMPs in SSc patients.
• To explore the association between AMPs and SSc disease characteristics.

Main Methods:

• Serum AMP levels were measured in 42 SSc patients and 38 healthy controls.
• SSc patient data included disease subset, autoantibodies, inflammatory markers (ESR, CRP), skin score, and organ involvement (lung, kidney, GI).
• Statistical analyses were performed to correlate AMP levels with clinical parameters.

Main Results:

• Serum alpha defensin levels were significantly higher in SSc patients compared to controls (p=0.02).
• No significant differences were found for beta-1 and beta-2 defensins.
• Elevated alpha defensin levels correlated with interstitial lung disease (p=0.04) and C-reactive protein (CRP) levels (r=0.34).

Conclusions:

• Alpha defensin levels are increased in systemic sclerosis.
• Elevated alpha defensins are associated with lung involvement in SSc.
• Alpha defensins may play a role in the pathogenesis of systemic sclerosis.