Abstract
Glucagon-like peptide-1 receptor (GLP-1R) is a key regulator of glucose metabolism known to be expressed by pancreatic β cells. We herein investigated the role of GLP-1R on T lymphocytes during immune response. Our data showed that a subset of T lymphocytes expresses GLP-1R, which is upregulated during alloimmune response, similarly to PD-1. When mice received islet or cardiac allotransplantation, an expansion of GLP-1Rpos T cells occurred in the spleen and was found to infiltrate the graft. Additional single-cell RNA sequencing (scRNA-seq) analysis conducted on GLP-1Rpos and GLP-1Rneg CD3+ T cells unveiled the existence of molecular and functional dissimilarities between both subpopulations, as the GLP-1Rpos are mainly composed of exhausted CD8 T cells. GLP-1R acts as a T cell-negative costimulatory molecule, and GLP-1R signaling prolongs allograft survival, mitigates alloimmune response, and reduces T lymphocyte graft infiltration. Notably, GLP-1R antagonism triggered anti-tumor immunity when tested in a preclinical mouse model of colorectal cancer.
| Original language | English |
|---|---|
| Pages (from-to) | 1302-1319.e12 |
| Journal | Cell Metabolism |
| Volume | 36 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 4 Jun 2024 |
| Externally published | Yes |
Funding
We thank Dr. Thorens for providing us with the anti-GLP-1R antibody used for pathology studies. We thank \u201C Fondazione Romeo and Enrica Invernizzi \u201D for their extraordinary support. F.D. was supported by the Italian Ministry of Health grant RF-2021-12372897 and by the Italian Ministry of University and Research grant 2022JY9CP . R.A. is supported by the NIH grant K24 AI116925 . P.F., C.L., and M.B.N. are supported by the Italian Ministry of University Research grants 20229ZA2YF , 2022NH9MXB , and 20225HWJMB , respectively.
Austrian Fields of Science 2012
- 302012 Diabetology
Keywords
- alloimmunity
- cancer
- GLP-1R
- GLP-1R agonists
- GLP-1R signaling
- immune checkpoint