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Modification and Functionalization of the Guanidine Group by Tailor-made Precursors
Published on: April 27, 2017
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Microenvironment tailors nTreg structure and function
Valérie Schiavon1,2, Sophie Duchez3, Mylène Branchtein4
1Laboratory of Oncodermatology, Immunology, and Cutaneous Stem Cells, INSERM U976, 75010 Paris, France.
Summary
Natural regulatory T cells (nTregs) have distinct maturation stages identified by CD39/CD26 markers. Their profile is stable in healthy individuals and may serve as a biomarker for autoimmune diseases.
Area of Science:
- Immunology
- Cell Biology
Background:
- Natural regulatory T cells (nTregs) are crucial for self-tolerance and are investigated for treating autoimmune diseases and graft-versus-host disease.
- Understanding nTreg subsets and their maturation is key to harnessing their therapeutic potential.
Purpose of the Study:
- To analyze blood nTreg subsets based on CD39/CD26 markers and understand their maturation process.
- To investigate the influence of microenvironmental factors on nTreg function and plasticity.
- To explore the potential of nTreg profiles as biomarkers for disease monitoring.
Main Methods:
- Analysis of blood nTreg subsets using CD39 and CD26 markers.
- Investigating the effects of IL-2, TGFβ, and PGE2 on nTreg differentiation ex vivo.
- Characterizing phenotypic, genetic, and functional properties of different nTreg subsets.
- Monitoring nTreg CD39/CD26 profiles over time in healthy individuals and patients.
Main Results:
- Five distinct nTreg subsets representing maturation stages were identified using CD39/CD26 markers.
- Microenvironmental factors direct the conversion of naive precursors to immature and mature memory nTregs.
- nTreg function is plastic, influenced by maturation stage and cytokines, mediating immune suppression through various mechanisms.
- Blood nTreg CD39/CD26 profiles are stable in healthy individuals but vary inter-personally, showing potential as disease biomarkers.
- Ex vivo reprogramming of conventional CD4 T cells yields suppressive FOXP3+ Tregs.
Conclusions:
- The CD39/CD26 profile defines distinct nTreg maturation stages with unique functional capacities.
- Microenvironmental cues critically regulate nTreg differentiation and function.
- The nTreg CD39/CD26 profile holds promise as a blood biomarker for monitoring inflammatory diseases and guiding cell-based therapies.
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