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In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Naïve CD4+ T Cells Using a TGF-β-containing Protocol
Published on: December 30, 2016
Specific immunosuppression with inducible Foxp3-transduced polyclonal T cells
Kristian G Andersen1, Tracey Butcher, Alexander G Betz
1Medical Research Council, Laboratory of Molecular Biology, Cambridge, United Kingdom.
Plos Biology
|November 13, 2008
Summary
Researchers developed inducible Foxp3-transduced T cells for on-demand immune suppression. This method effectively halts specific immune responses, like in arthritis, without causing widespread immunosuppression.
Area of Science:
- Immunology
- Cell Therapy
Background:
- Regulatory T cells (Tregs), identified by Foxp3 expression, are crucial for peripheral tolerance and preventing autoimmune diseases.
- Ectopic Foxp3 expression can induce a Treg phenotype in conventional T cells, offering therapeutic potential for autoimmunity and transplant rejection.
Purpose of the Study:
- To develop an on-demand immune suppression strategy using T cells engineered with an inducible form of Foxp3 (iFoxp3).
- To evaluate the efficacy of iFoxp3-transduced T cells in suppressing immune responses without causing systemic immunosuppression, using collagen-induced arthritis as a model.
Main Methods:
- Adoptive transfer of polyclonal, wild-type T cells transduced with an inducible Foxp3 (iFoxp3) construct.
- Induction of iFoxp3 expression in transferred T cells to elicit a regulatory phenotype.
- Assessment of T cell homing, expansion, and suppressive function in secondary lymphoid organs.
- Evaluation of therapeutic efficacy in a collagen-induced arthritis mouse model.
Main Results:
- iFoxp3-transduced T cells exhibit proper homing to secondary lymphoid organs and participate in immune responses before induction.
- Upon iFoxp3 induction, these cells acquire a regulatory T cell phenotype and suppress ongoing immune responses locally.
- This approach successfully suppressed collagen-induced arthritis, whereas conventional Foxp3-transduced cells were ineffective.
- The method allows for specific immune response halting without prior antigen knowledge and avoids systemic immunosuppression.
Conclusions:
- Inducible Foxp3-transduced T cells provide a controllable and specific method for immune suppression on demand.
- This strategy holds promise for treating autoimmune diseases and preventing transplant rejection by precisely targeting aberrant immune responses.
- The ability to halt immune responses without systemic effects represents a significant advancement in cell-based immunotherapy.
