| First Author | Mohammadpour H | Year | 2021 |
| Journal | Cell Rep | Volume | 37 |
| Issue | 4 | Pages | 109883 |
| PubMed ID | 34706232 | Mgi Jnum | J:334276 |
| Mgi Id | MGI:6883842 | Doi | 10.1016/j.celrep.2021.109883 |
| Citation | Mohammadpour H, et al. (2021) beta2-adrenergic receptor signaling regulates metabolic pathways critical to myeloid-derived suppressor cell function within the TME. Cell Rep 37(4):109883 |
| abstractText | Myeloid-derived suppressor cells (MDSCs) impede antitumor immunity; however, the precise mechanisms that regulate their suppressive function remain unresolved. Identifying these mechanisms could lead to therapeutic interventions to boost cancer immunotherapy efficacy. Here, we reveal that beta2 adrenergic receptor (beta2-AR) expression on MDSCs increases with tumor growth and that the beta2-AR stress pathway drives the immune suppressive activity of MDSCs by altering their metabolism. We show that beta2-AR signaling decreases glycolysis and increases oxidative phosphorylation and fatty acid oxidation (FAO). It also increases expression of the fatty acid transporter CPT1A, which is necessary for the FAO-mediated immunosuppressive function of MDSCs. Moreover, we show that beta2-AR signaling increases autophagy and activates the arachidonic acid cycle, both required for increasing the release of the immunosuppressive mediator, PGE2. Our data reveal that beta2-AR signaling triggered by stress is an important physiological regulator of key metabolic pathways in MDSCs, driving their immunosuppressive function. |
