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Area of Science:

• Pediatric Gastroenterology
• Immunology
• Autoimmune Diseases

Background:

• Crohn's disease (CD) is a chronic inflammatory bowel disease with complex etiology.
• Autoimmune processes are implicated in the pathogenesis of pediatric CD.
• Understanding immune system dysregulation is crucial for diagnosis and management.

Purpose of the Study:

• To characterize the autoimmune reaction features in children diagnosed with Crohn's disease.
• To evaluate the prevalence of specific autoantibodies and immunoglobulin levels in pediatric CD patients.
• To explore correlations between immune markers and disease activity.

Main Methods:

• Serum samples from 62 children (2-17 years) with CD were analyzed.
• Assessed levels of immunoglobulins (IgA, IgM, IgG, IgE).
• Measured antibodies to Saccharomyces cerevisiae (ASCA), Candida albicans, anti-neutrophilic cytoplasmic antibodies (ANCA), anti-nuclear antibodies (ANA), antibodies to DNA, intestinal antigens, and pancreas antigens, plus circulating immune complexes.

Main Results:

• Hypergammaglobulinemia was observed in 75.8% of patients; elevated IgM in 46.8%.
• Anti-Saccharomyces cerevisiae (ASCA) IgE was most frequent (70.9%), with elevated ASCA (IgA, IgG) in 35.5%.
• Significant correlations were found between various autoantibodies and immune markers, indicating an intense autoimmune process. ASCA positivity was a poor prognostic sign.

Conclusions:

• Pediatric Crohn's disease is associated with a pronounced autoimmune response.
• Specific autoantibodies, particularly ASCA, are prevalent and may serve as prognostic markers.
• Immune diagnostics are essential for assessing disease severity, differential diagnosis, prognosis, and guiding therapy in pediatric CD.