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Updated: Apr 21, 2026
Intravital Imaging of Intraepithelial Lymphocytes in Murine Small Intestine
Published on: June 24, 2019
Distal duodenum versus duodenal bulb: intraepithelial lymphocytes have something to say in celiac disease diagnosis
Ana De Andrés1, Cristina Camarero, Garbiñe Roy
1Department of Immunology, Hospital Universitario Ramón y Cajal de Madrid, Carretera de Colmenar km 9100, 28034, Madrid, Spain, aandres.hrc@salud.madrid.org.
Insights
Flow cytometry analysis of intraepithelial lymphocytes (IELs) in duodenal biopsies can accurately diagnose celiac disease. This immunological profile helps differentiate celiac mucosa from healthy tissue, overcoming limitations of traditional histology.
Area of Science:
- Gastroenterology
- Immunology
- Cell Biology
Background:
- Celiac disease diagnosis often requires duodenal biopsy after initial clinical and serological tests.
- Histological analysis of biopsies can be complicated by mild, unspecific, or patchy lesions.
Purpose of the Study:
- To evaluate the utility of intraepithelial lymphocyte (IEL) analysis via flow cytometry for celiac disease diagnosis.
- To determine if IEL counts and subset distribution provide a reliable immunophenotype for differentiating celiac from healthy duodenal mucosa.
Main Methods:
- Analysis of duodenal lymphoid components, including total IELs, TcR-γδ, and CD3(-)IELs, using flow cytometry.
- Samples were obtained from both the duodenal bulb and distal duodenum during diagnostic upper gastrointestinal endoscopies.
Main Results:
- IEL counts and subset distribution (IEL lymphogram) showed a consistent profile across the duodenal mucosa.
- This specific immunophenotype reliably distinguished between healthy and celiac duodenal mucosa.
- The identified celiac immunophenotype remained consistent irrespective of biopsy location or histological findings.
Conclusions:
- The IEL lymphogram determined by flow cytometry is proposed as a valuable immunological marker for diagnosing celiac disease.
- This method can overcome diagnostic challenges posed by minor histological changes, patchiness, and biopsy site variability.
Background And Aim:
After clinical screening and the serological test, many patients still require a duodenal biopsy for celiac disease diagnosis. Mild histological lesions, unspecific findings and patchiness are frequent outcomes of this mandatory diagnostic tool, thus complicating clinical decisions.
Methods:
We analyzed the lymphoid components [number of total intraepithelial lymphocytes (IELs), TcR-γδ and CD3(-)IELs] of the duodenal epithelium by flow cytometry in samples obtained from bulb and distal duodenum during upper gastrointestinal endoscopies performed for diagnostic purposes.
Results:
IEL counts and IEL subset distribution (IEL lymphogram) remain invariant along duodenal mucosa revealing a specific profile (immunophenotype) that characterizes either a healthy mucosa or a celiac mucosa. The celiac immunophenotype persists regardless of the biopsy's anatomical location or the corresponding histological findings.
Conclusions:
We propose the IEL lymphogram by flow cytometry as an immunological parameter to discern celiac condition from healthy mucosa. This obviates not only misinterpretation of minor histological changes, but also patchiness and the concerns about the location and number of biopsies.
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