Deletion of GARP on mouse regulatory T cells is not sufficient to inhibit the growth of transplanted tumors.
Document Type
Article
Publication Date
10-2018
JAX Source
Cell Immunol 2018 Oct; 332:129-133
Volume
332
First Page
129
Last Page
133
ISSN
1090-2163
PMID
30093071
DOI
https://doi.org/10.1016/j.cellimm.2018.07.011
Abstract
GARP is a transmembrane protein that presents latent TGF-β1 on the surface of regulatory T cells (Tregs). Neutralizing anti-GARP monoclonal antibodies that prevent the release of active TGF-β1, inhibit the immunosuppressive activity of human Tregs in vivo. In this study, we investigated the contribution of GARP on mouse Tregs to immunosuppression in experimental tumors. Unexpectedly, Foxp3 conditional garp knockout (KO) mice challenged orthotopically with GL261 tumor cells or subcutaneously with MC38 colon carcinoma cells did not show prolonged survival or delayed tumor growth. Also, the suppressive function of KO Tregs was similar to that of wild type Tregs in the T cell transfer model in allogeneic, immunodeficient mice. In conclusion, garp deletion in mouse Tregs is not sufficient to impair their immunosuppressive activity in vivo.
Recommended Citation
Vermeersch E,
Liénart S,
Collignon A,
Lucas S,
Gallimore A,
Gysemans C,
Unutmaz D,
Vanhoorelbeke K,
De Meyer S,
Maes W,
Deckmyn H.
Deletion of GARP on mouse regulatory T cells is not sufficient to inhibit the growth of transplanted tumors. Cell Immunol 2018 Oct; 332:129-133