The dietary sweetener sucralose is a negative modulator of T cell-mediated responses

Fabio Zani, Julianna Blagih, Tim Gruber, Michael D. Buck, Nicholas Jones, Marc Hennequart, Clare L. Newell, Steven E. Pilley, Pablo Soro-Barrio, Gavin Kelly, Nathalie M. Legrave, Eric C. Cheung, Ian S. Gilmore, Alex P. Gould, Cristina Garcia-Caceres, Karen H. Vousden

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Abstract

Artificial sweeteners are used as calorie-free sugar substitutes in many food products and their consumption has increased substantially over the past years1. Although generally regarded as safe, some concerns have been raised about the long-term safety of the consumption of certain sweeteners2–5. In this study, we show that the intake of high doses of sucralose in mice results in immunomodulatory effects by limiting T cell proliferation and T cell differentiation. Mechanistically, sucralose affects the membrane order of T cells, accompanied by a reduced efficiency of T cell receptor signalling and intracellular calcium mobilization. Mice given sucralose show decreased CD8+ T cell antigen-specific responses in subcutaneous cancer models and bacterial infection models, and reduced T cell function in models of T cell-mediated autoimmunity. Overall, these findings suggest that a high intake of sucralose can dampen T cell-mediated responses, an effect that could be used in therapy to mitigate T cell-dependent autoimmune disorders.

Original languageEnglish
Pages (from-to)705-711
Number of pages7
JournalNature
Volume615
Issue number7953
DOIs
Publication statusPublished - 23 Mar 2023
Externally publishedYes

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