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Updated: Aug 8, 2026

Human In Vitro Suppression as Screening Tool for the Recognition of an Early State of Immune Imbalance
Published on: July 22, 2011
Antigen-specific T cell suppression by human CD4+CD25+ regulatory T cells
Leonie S Taams1, Milica Vukmanovic-Stejic, Jay Smith
1Department of Rheumatology and Clinical Immunology, University Medical Center Utrecht, Utrecht, The Netherlands. L.S.Taams@azu.nl
Human CD4+CD25+ T cells suppress immune responses to various antigens. These highly differentiated cells, generated in the periphery, play a key role in maintaining immune tolerance to diverse self, dietary, and foreign antigens.
Area of Science:
- Immunology
- Cell Biology
- Peripheral Tolerance
Background:
- CD4+CD25+ T cells are implicated in maintaining peripheral immune tolerance.
- Previous research suggested their role in self-antigen tolerance.
Purpose of the Study:
- To investigate the antigen specificity and origin of human CD4+CD25+ T cells.
- To determine if these cells are generated in the periphery.
Main Methods:
- Analysis of T cell receptor Vbeta repertoire usage.
- Phenotypic characterization including CD45RO and CD45RB expression.
- Telomere length assessment.
- In vitro stimulation assays with antigen-presenting cells.
Main Results:
- Human CD4+CD25+ T cells suppress proliferation to self, dietary, and foreign antigens.
- These cells exhibit broad T cell receptor Vbeta usage, indicating recognition of diverse antigens.
- They possess a highly differentiated phenotype (CD45RO+, CD45RBlow, short telomeres).
- Antigen stimulation by non-professional antigen-presenting cells can induce suppressive function in differentiated CD4+ T cells.
Conclusions:
- CD4+CD25+ T cells are generated in the human periphery through repeated antigen encounters.
- Peripheral generation of these regulatory T cells provides a mechanism for tolerance to antigens not encountered in the thymus.
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