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IFN-α and IL-10 Induce the Differentiation of Human Type 1 T Regulatory Cells

Levings, Megan K, Sangregorio, Romina, Galbiati, Francesca, Squadrone, Stefania, de Waal Malefyt, Rene, Roncarolo, Maria-Grazia·2001·The Journal of Immunology

Abstract

CD4+ T regulatory type 1 (Tr1) cells suppress Ag-specific immune responses in vitro and in vivo. Although IL-10 is critical for the differentiation of Tr1 cells, the effects of other cytokines on differentiation of naive T cells into Tr1 cells have not been investigated. Here we demonstrate that endogenous or exogenous IL-10 in combination with IFN-α, but not TGF-β, induces naive CD4+ T cells derived from cord blood to differentiate into Tr1 cells: IL-10+IFN-γ+IL-2−/lowIL-4−. Naive CD4+ T cells derived from peripheral blood require both exogenous IL-10 and IFN-α for Tr1 cell differentiation. The proliferative responses of the Tr1-containing lymphocyte populations, following activation with anti-CD3 and anti-CD28 mAbs, were reduced. Similarly, cultures containing Tr1 cells displayed reduced responses to alloantigens via a mechanism that was partially mediated by IL-10 and TGF-β. More importantly, Tr1-containing populations strongly suppressed responses of naive T cells to alloantigens. Collectively, these results show that IFN-α strongly enhances IL-10-induced differentiation of functional Tr1 cells, which represents a first major step in establishing specific culture conditions to generate T regulatory cells for biological and biochemical analysis, and for cellular therapy to induce peripheral tolerance in humans.

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Crossref · 10.4049/jimmunol.166.9.5530

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Authors
Levings, M. K., Sangregorio, R., Galbiati, F., Squadrone, S., de Waal Malefyt, R., & Roncarolo, M.-G.
Venue
The Journal of Immunology
Published
2001-05-01
Volume
166
Issue
9
Pages
5530-5539
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W2136245823
Cited by
595
References
1
FWCI
11.94
Type
journal article
Language
en
Open access
closed

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