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Galectin-1 triggers an immunoregulatory signature in Th cells functionally defined by IL-10 expression.


ABSTRACT: Galectin-1 (Gal-1), a ?-galactoside-binding protein, can alter fate and effector function of Th cells; however, little is known about how Gal-1 induces Th cell differentiation. In this article, we show that both uncommitted and polarized Th cells bound by Gal-1 expressed an immunoregulatory signature defined by IL-10. IL-10 synthesis was stimulated by direct Gal-1 engagement to cell surface glycoproteins, principally CD45, on activated Th cells and enhanced by IL-21 expression through the c-Maf/aryl hydrocarbon receptor pathway, independent of APCs. Gal-1-induced IL-10(+) T cells efficiently suppressed T cell proliferation and T cell-mediated inflammation and promoted the establishment of cancer immune-privileged sites. Collectively, these findings show how Gal-1 functions as a major glycome determinant regulating Th cell development, inflammation, and tumor immunity.

SUBMITTER: Cedeno-Laurent F 

PROVIDER: S-EPMC3311782 | biostudies-literature | 2012 Apr

REPOSITORIES: biostudies-literature

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Galectin-1 triggers an immunoregulatory signature in Th cells functionally defined by IL-10 expression.

Cedeno-Laurent Filiberto F   Opperman Matthew M   Barthel Steven R SR   Kuchroo Vijay K VK   Dimitroff Charles J CJ  

Journal of immunology (Baltimore, Md. : 1950) 20120217 7


Galectin-1 (Gal-1), a β-galactoside-binding protein, can alter fate and effector function of Th cells; however, little is known about how Gal-1 induces Th cell differentiation. In this article, we show that both uncommitted and polarized Th cells bound by Gal-1 expressed an immunoregulatory signature defined by IL-10. IL-10 synthesis was stimulated by direct Gal-1 engagement to cell surface glycoproteins, principally CD45, on activated Th cells and enhanced by IL-21 expression through the c-Maf/  ...[more]

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