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Recasting the Tissue-Resident Lymphocyte in Celiac Disease
Hisako Kayama1, Kiyoshi Takeda1
1Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan; WPI Immunology Frontier Research Center, Osaka University, Osaka 565-0871, Japan.
Immunity
|March 21, 2019
Summary
Chronic inflammation in celiac disease alters intestinal immune cells called TCR gamma delta intraepithelial lymphocytes. These changes persist even on a gluten-free diet, potentially explaining ongoing gluten sensitivity in celiac disease patients.
Area of Science:
- Immunology
- Gastroenterology
- Cell Biology
Background:
- Celiac disease (CeD) is an autoimmune disorder triggered by gluten ingestion.
- Chronic inflammation is a hallmark of active celiac disease.
- Intraepithelial lymphocytes play a role in mucosal immunity.
Purpose of the Study:
- To investigate the impact of chronic inflammation in celiac disease on intestinal TCR gamma delta (γδ) intraepithelial lymphocytes.
- To determine if gluten-free dietary regimens reverse these changes.
- To explore the potential role of these lymphocytes in long-term gluten sensitivity.
Main Methods:
- Analysis of intestinal biopsies from celiac disease patients.
- Characterization of the T cell receptor (TCR) γδ+ intraepithelial lymphocyte population.
- Assessment of lymphocyte repertoire and functional phenotype.
Main Results:
- Chronic inflammation in celiac disease significantly alters the composition and function of intestinal TCR γδ+ intraepithelial lymphocytes.
- These observed alterations are not restored by adherence to a gluten-free diet.
- The persistent changes suggest a potential mechanism for long-term gluten sensitivity.
Conclusions:
- TCR γδ+ intraepithelial lymphocytes in celiac disease exhibit persistent changes due to chronic inflammation.
- These immunological modifications may contribute to the enduring sensitivity to gluten experienced by celiac disease patients.
- Further research into these lymphocytes could offer new therapeutic targets for celiac disease management.
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