Gluten and celiac disease--an immunological perspective

Area of Science:

• Immunology
• Gastroenterology
• Food Science

Background:

• Celiac disease (CD) is an autoimmune enteropathy affecting approximately 1% of the population, triggered by gluten in genetically susceptible individuals.
• Gluten ingestion leads to T-cell activation, gastrointestinal mucosal damage, villi atrophy, and increased intestinal permeability via zonulin release.
• Interleukin-15 (IL-15) exacerbates CD pathology by promoting intraepithelial lymphocyte expansion and increasing lymphoma risk.

Purpose of the Study:

• To review celiac disease (CD) aspects, focusing on immunological triggers and consequences.
• To discuss the challenges in establishing safe gluten thresholds for gluten-free foods.
• To highlight the need for bioassays measuring gluten-induced immunobiological responses.

Main Methods:

• Literature review of celiac disease (CD) pathophysiology and immunological mechanisms.
• Analysis of current challenges in gluten detection, quantification, and threshold setting for food labeling.
• Discussion on the limitations of existing analytical methods and the absence of immunobiological assays.

Main Results:

• Gluten peptides activate T-cells and influence intestinal permeability through CXCR3 and zonulin.
• IL-15 plays a critical role in epithelial damage and T-cell lymphoma development in CD.
• Current gluten thresholds are limited by analytical variability and patient heterogeneity; no bioassay exists for immunobiological responses.

Conclusions:

• Effective management of celiac disease (CD) requires strict dietary gluten avoidance.
• Accurate and reliable gluten thresholds are crucial for food labeling but are hampered by analytical and clinical complexities.
• Development of a bioassay to measure gluten-induced immune responses is essential for improving CD management and food safety.