» Articles » PMID: 28898698

Enhancing CD8 T Cell Fatty Acid Catabolism Within a Metabolically Challenging Tumor Microenvironment Increases the Efficacy of Melanoma Immunotherapy

Abstract

How tumor-infiltrating T lymphocytes (TILs) adapt to the metabolic constrains within the tumor microenvironment (TME) and to what degree this affects their ability to combat tumor progression remain poorly understood. Using mouse melanoma models, we report that CD8 TILs enhance peroxisome proliferator-activated receptor (PPAR)-α signaling and catabolism of fatty acids (FAs) when simultaneously subjected to hypoglycemia and hypoxia. This metabolic switch partially preserves CD8 TILs' effector functions, although co-inhibitor expression increases during tumor progression regardless of CD8 TILs' antigen specificity. Further promoting FA catabolism improves the CD8 TILs' ability to slow tumor progression. PD-1 blockade delays tumor growth without changing TIL metabolism or functions. It synergizes with metabolic reprogramming of T cells to achieve superior antitumor efficacy and even complete cures.

Citing Articles

Fatty acid metabolism shapes immune responses in chronic lymphocytic leukemia.

Zhang Y, Ma J, Li P, Lu K, Han Y, Hu X Biomark Res. 2025; 13(1):42.

PMID: 40075418 PMC: 11905569. DOI: 10.1186/s40364-025-00753-7.


CRSP8-driven fatty acid metabolism reprogramming enhances hepatocellular carcinoma progression by inhibiting RAN-mediated PPARα nucleus-cytoplasm shuttling.

Lin Y, Liang Z, Weng Z, Liu X, Zhang F, Chong Y J Exp Clin Cancer Res. 2025; 44(1):93.

PMID: 40069732 PMC: 11895297. DOI: 10.1186/s13046-025-03329-3.


A functional single-cell metabolic survey identifies Elovl1 as a target to enhance CD8 T cell fitness in solid tumours.

Pretto S, Yu Q, Bourdely P, Trusso Cafarello S, Van Acker H, Verelst J Nat Metab. 2025; .

PMID: 40065102 DOI: 10.1038/s42255-025-01233-w.


The CD64/CD28/CD3ζ chimeric receptor reprograms T-cell metabolism and promotes T-cell persistence and immune functions while triggering antibody-independent and antibody-dependent cytotoxicity.

Caratelli S, De Paolis F, Silvestris D, Baldari S, Salvatori I, Tullo A Exp Hematol Oncol. 2025; 14(1):17.

PMID: 39962623 PMC: 11834217. DOI: 10.1186/s40164-025-00601-2.


Sorafenib enhanced the function of myeloid-derived suppressor cells in hepatocellular carcinoma by facilitating PPARα-mediated fatty acid oxidation.

Li C, Xiong L, Yang Y, Jiang P, Wang J, Li M Mol Cancer. 2025; 24(1):34.

PMID: 39876004 PMC: 11773820. DOI: 10.1186/s12943-025-02238-5.


References
1.
Finlay D, Rosenzweig E, Sinclair L, Feijoo-Carnero C, Hukelmann J, Rolf J . PDK1 regulation of mTOR and hypoxia-inducible factor 1 integrate metabolism and migration of CD8+ T cells. J Exp Med. 2012; 209(13):2441-53. PMC: 3526360. DOI: 10.1084/jem.20112607. View

2.
Balmer M, Ma E, Bantug G, Grahlert J, Pfister S, Glatter T . Memory CD8(+) T Cells Require Increased Concentrations of Acetate Induced by Stress for Optimal Function. Immunity. 2016; 44(6):1312-24. DOI: 10.1016/j.immuni.2016.03.016. View

3.
Crompton J, Sukumar M, Roychoudhuri R, Clever D, Gros A, Eil R . Akt inhibition enhances expansion of potent tumor-specific lymphocytes with memory cell characteristics. Cancer Res. 2014; 75(2):296-305. PMC: 4384335. DOI: 10.1158/0008-5472.CAN-14-2277. View

4.
Hamanaka R, Chandel N . Targeting glucose metabolism for cancer therapy. J Exp Med. 2012; 209(2):211-5. PMC: 3280882. DOI: 10.1084/jem.20120162. View

5.
Zou W, Wolchok J, Chen L . PD-L1 (B7-H1) and PD-1 pathway blockade for cancer therapy: Mechanisms, response biomarkers, and combinations. Sci Transl Med. 2016; 8(328):328rv4. PMC: 4859220. DOI: 10.1126/scitranslmed.aad7118. View