Celiac.com 08/29/2007 - A study that appeared in the August issue of Journal of Clinical Gastroenterology, found that celiac disease and small intestinal bacterial growth both show increased levels of intraepithelial lymphocytes (IELs), especially gammadelta+ IELs. A sharp increase in gammadelta+ IELs has been noted in people with celiac disease, but little is known about the role of this particular class of IELs in other intestinal pathologies.
The study team looked at 12 individuals with untreated celiac disease, 8 patients with SIBO, and 10 patients with diarrhea-predominant IBS. All patients were given an upper-endoscopy for mucosal biopsy and jejunal aspirate. Intraepithelial cells were isolated from 2 small bowel biopsies, and labeled with monoclonal antibodies CD103-PE (phycoerythrin), CD3-FITC (fluoresecein isothio-cynate), celiac disease-7R-PE, CD45RO-APC (allophycocyanin), and TcR gammadelta-FITC.
Researchers conducted flow cytometry analysis using a standard FACScan. Total IEL levels and subsequent levels were catalogued as percentages as follows: 16.7 +/- 6% for IBS patients; 25.7 +/- 17% for SIBO patients; and 26 +/- +/- 13% in celiac patients (P=0.2). Patients with SIBO & celiac disease showed significantly higher percentages of gammadelta+ IELs (14.6 +/- 8% and 15.7 +/- 13%) compared to IBS patients (4.1 +/- 2.5%, P<0.05).
The results of the study indicate that gammadelta+ IELs might play a crucial role against intestinal bacterial infections.
Journal of Clinical Gastroenterology. 2007 Aug;41(7):671-676health writer who lives in San Francisco and is a frequent author of articles for Celiac.com.