Recent research by the Salk Institute has unveiled how nutrient preferences influence T cell identity, particularly in chronic infections like cancer and HIV, leading to a deeper understanding of the relationship between nutrition and cellular health throughout the body. The study, published in Science, reveals that a shift from acetate to citrate as a nutritional source is crucial in converting active effector T cells to exhausted states. This switch hinges on the metabolic enzymes ACSS2 and ACLY, which process acetate and citrate respectively to produce acetyl-CoA, a metabolite linked to gene expression regulation. The research found that functional T cells predominantly express ACSS2, while exhausted T cells rely more on ACLY. By manipulating these enzymes, scientists observed changes in T cell activity and exhaustion. This discovery underscores a significant relationship between a cell’s metabolic processes and its identity, suggesting potential therapeutic targets to maintain T cell functionality in chronic diseases.

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[Source: GEN, December 12, 2024.]