期刊
FRONTIERS IN IMMUNOLOGY
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2022.976628
关键词
T cell engineering; metabolism; glucose; immunotherapy; tumor; adoptive cell therapy
类别
资金
- Ludwig Institute for Cancer Research
- Swiss National Science Foundation [310030_204326]
- Prostate Cancer Foundation
- Swiss National Science Foundation (SNF) [310030_204326] Funding Source: Swiss National Science Foundation (SNF)
This study found that enforced expression of the high-affinity glucose transporter GLUT3 can improve metabolic fitness of tumor-directed T cells. GLUT3-OT1 T cells showed better tumor control and significantly improved survival in a melanoma model, with some treated mice being cured and protected from re-challenge, indicating long-term T cell persistence and memory formation.
Despite the tremendous success of adoptive T-cell therapies (ACT) in fighting certain hematologic malignancies, not all patients respond, a proportion experience relapse, and effective ACT of most solid tumors remains elusive. In order to improve responses to ACT suppressive barriers in the solid tumor microenvironment (TME) including insufficient nutrient availability must be overcome. Here we explored how enforced expression of the high-affinity glucose transporter GLUT3 impacted tumor-directed T cells. Overexpression of GLUT3 in primary murine CD8(+) T cells enhanced glucose uptake and increased glycogen and fatty acid storage, and was associated with increased mitochondrial fitness, reduced ROS levels, higher abundance of the antiapoptotic protein Mcl-1, and better resistance to stress. Importantly, GLUT3-OT1 T cells conferred superior control of B16-OVA melanoma tumors and, in this same model, significantly improved survival. Moreover, a proportion of treated mice were cured and protected from re-challenge, indicative of long-term T cell persistence and memory formation. Enforcing expression of GLUT3 is thus a promising strategy to improve metabolic fitness and sustaining CD8(+) T cell effector function in the context of ACT.
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