Depressed cell-mediated immunity in coeliac disease

Area of Science:

• Immunology
• Gastroenterology

Background:

• Coeliac disease is an autoimmune disorder triggered by gluten ingestion.
• Cell-mediated immunity (CMI) plays a critical role in immune responses.
• Impaired CMI may be linked to increased health risks in coeliac patients.

Purpose of the Study:

• To investigate the integrity of cell-mediated immunity (CMI) in coeliac patients.
• To assess the impact of a gluten-free diet (GFD) on CMI in coeliac disease.
• To explore potential factors influencing CMI in this population.

Main Methods:

• Lymphocyte transformation assays in response to phytohemagglutinin (PHA).
• Comparison of lymphocyte response in patient's own serum versus pooled AB serum.
• Mantoux (tuberculin) skin tests to evaluate CMI.
• Study groups included coeliac patients on a normal diet and a GFD.

Main Results:

• Lymphocyte transformation was depressed in most coeliac patients on a normal diet.
• A significant improvement in lymphocyte transformation was observed after adherence to a GFD.
• Some patients showed improved lymphocyte response when cultured in pooled AB serum, suggesting a serum factor.
• Mantoux tests revealed a significantly lower incidence of positive reactions in coeliac patients compared to controls.

Conclusions:

• Coeliac patients on a normal diet exhibit depressed CMI, which normalizes with a GFD.
• The findings support the importance of a strict GFD for managing coeliac disease.
• Depressed CMI in coeliac disease may be relevant to the elevated risk of malignancy observed in these patients.