Increased α-defensin-1 expression in Korean patients with Behcet's disease

Area of Science:

• Immunology
• Rheumatology
• Molecular Biology

Background:

• Behçet's disease (BD) is a chronic inflammatory disorder with complex pathogenesis.
• The role of antimicrobial peptides like alpha-defensin-1 in BD is not fully understood.
• Understanding biomarkers for BD activity is crucial for patient management.

Purpose of the Study:

• To quantify alpha-defensin-1 expression in peripheral blood of BD patients and healthy controls.
• To investigate the correlation between alpha-defensin-1 levels and clinical manifestations of BD.

Main Methods:

• Patients meeting international BD study group criteria were included.
• Alpha-defensin-1 protein levels were measured in serum using ELISA.
• Alpha-defensin-1 mRNA levels were quantified in peripheral blood mononuclear cells (PBMCs) via real-time PCR.

Main Results:

• Significantly higher alpha-defensin-1 mRNA levels were observed in BD patients compared to healthy controls (P=0.03).
• Both mRNA and protein levels of alpha-defensin-1 were markedly elevated in active BD patients versus inactive patients (P<0.001 and P=0.001, respectively).
• Increased alpha-defensin-1 mRNA expression was noted in BD patients with arthritis.

Conclusions:

• Alpha-defensin-1 mRNA and protein are upregulated in Behçet's disease, particularly during active phases.
• Elevated alpha-defensin-1 mRNA in PBMCs of BD patients with arthritis suggests a role in joint inflammation.
• Alpha-defensin-1 shows potential as a biomarker for BD pathogenesis and disease activity assessment.