1. P039 Regional distribution of TCR Vδ1 and TCR Vδ2 cells in healthy and inflamed mucosa of inflammatory bowel disease
- Author
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Carme Loras, Fernando Fernández-Bañares, Maria Esteve, Yamile Zabana, Anna Carrasco, Xavier Andújar, I Salvador, Eva Tristán, Diana Horta, A Martín-Cardona, and Montserrat Aceituno
- Subjects
Crohn's disease ,medicine.diagnostic_test ,business.industry ,T-cell receptor ,Gastroenterology ,Mucous membrane ,Inflammation ,General Medicine ,medicine.disease ,Inflammatory bowel disease ,Ulcerative colitis ,medicine.anatomical_structure ,Immunology ,Biopsy ,medicine ,medicine.symptom ,Antigen-presenting cell ,business - Abstract
Background Vδ1+ and Vδ2+ are TCRγδ lymphocytes of the gut intraepithelial compartment that recognise proteins without help of antigen-presenting cells. Its relevance in inflammatory bowel disease (IBD) is unknown. Aim To measure Vδ1+ and Vδ2+ in T-cell subtypes [CD4+, CD8+, double positive (DP,CD4+CD8+), double negative (DN,CD4−CD8−) and CD103+] of healthy and IBD inflammed gut mucosa. Methods Twenty-six active IBD patients without immunosuppressants (n = 18 Crohn’s disease (CD), eight ulcerative colitis (UC)) and 10 healthy controls (paired biopsies of ileum, right and left colon) were included. Lymphocytes were analysed with LSRFortessa cytometer. Results expressed as % median (25–75%IQI). Results Healthy mucosa: reduction in ileum of total CD3+Vδ1+ due to CD3+CD8+Vδ1+ and CD3+DN_Vδ1+ Conclusion Reduction of Vδ1+ and Vδ2+, mainly of CD103+, may play a role in IBD pathophysiology by perpetuating inflammation. Increase of CD3+Vδ1+CD4+ in both Ileal CD and UC may compensate this decrease with a selective increase in ‘helper’ function.
- Published
- 2020