Sodium chloride in the tumor microenvironment enhances T cell metabolic fitness and cytotoxicity.

ABSTRACT: The efficacy of antitumor immunity is associated with the metabolic state of cytotoxic T cells, which is sensitive to the tumor microenvironment. Whether ionic signals affect adaptive antitumor immune responses is unclear. In the present study, we show that there is an enrichment of sodium in solid tumors from patients with breast cancer. Sodium chloride (NaCl) enhances the activation state and effector functions of human CD8⁺ T cells, which is associated with enhanced metabolic fitness. These NaCl-induced effects translate into increased tumor cell killing in vitro and in vivo. Mechanistically, NaCl-induced changes in CD8⁺ T cells are linked to sodium-induced upregulation of Na⁺/K⁺-ATPase activity, followed by membrane hyperpolarization, which m

SUBMITTER: Soll D 

PROVIDER: S-EPMC11436365 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature