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Decrease of CD4(+) CD25(+) CD127(low) FoxP3(+) regulatory T cells with impaired suppressive function in untreated
Mousa Mohammadnia-Afrouzi1, Ahmad Zavaran Hosseini1, Ali Khalili2
1a Department of Immunology, Faculty of Medical Sciences , Tarbiat Modares University , Tehran , Iran .
Autoimmunity
|September 4, 2015
Summary
Regulatory T (Treg) cells are crucial for immune balance. This study found fewer functional Treg cells in ulcerative colitis patients, suggesting their role in disease development.
Area of Science:
- Immunology
- Gastroenterology
Background:
- Regulatory T (Treg) cells are vital for immune homeostasis and peripheral tolerance.
- Ulcerative colitis (UC) is an inflammatory bowel disease with complex immune dysregulation.
Purpose of the Study:
- To investigate the frequency and function of Treg cells in active, untreated UC patients.
- To determine the correlation between Treg cell characteristics and UC disease activity.
Main Methods:
- Flow cytometry was used to analyze Treg cell frequency (CD4, CD25, CD127, FoxP3) in 32 UC patients and 31 healthy controls.
- Treg cell suppressive activity was assessed by their ability to inhibit T responder cell proliferation.
- Isolation of Treg cells utilized surface markers CD4, CD25, and CD127(low).
Main Results:
- UC patients exhibited a significantly lower frequency of CD4(+) CD25(+) CD127(low) FoxP3(+) Treg cells compared to controls.
- The suppressive function of Treg cells was diminished in UC patients.
- Reduced Treg cell frequency and suppressive capacity, along with lower FoxP3 MFI, correlated inversely with UC disease activity.
Conclusions:
- Impaired Treg cell frequency and function may contribute to the immunopathogenesis of ulcerative colitis.
- Assessing Treg cell parameters could hold clinical value for UC patients.
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