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Cutting Edge: CTLA-4–B7 Interaction Suppresses Th17 Cell Differentiation
Journal article   Peer reviewed

Cutting Edge: CTLA-4–B7 Interaction Suppresses Th17 Cell Differentiation

Haiyan Ying, Lifen Yang, Guilin Qiao, Zhenping Li, Li Zhang, Fei Yin, Dong Xie and Jian Zhang
The Journal of immunology (1950), Vol.185(3), pp.1375-1378
08/01/2010
DOI: 10.4049/jimmunol.0903369
PMCID: PMC2915549
PMID: 20601598

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Abstract

Th cells that produce IL-17 (Th17 cells) are a distinct subset of Th cells implicated in several autoimmune diseases. Although CD28–B7 interaction has been shown to be involved in Th17 differentiation in vitro, the role of CTLA-4 in controlling Th17 development is completely unknown. We report in this paper that blocking the CTLA-4–B7 interaction potentiates Th17 cell differentiation in vitro and in vivo. Furthermore, blocking CTLA-4–B7 interaction in vivo confers the susceptibility of experimental autoimmune myocarditis to CD28 −/− mice or increases the severity of experimental autoimmune myocarditis in wild-type mice. The enhanced disease susceptibility is mediated by heightened Th17 responses. With these results, we are the first to demonstrate that CTLA-4–B7 interaction inhibits Th17 differentiation in vitro and in vivo and suppresses Th17-mediated autoimmunity.

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