Abstract
Proper cellular metabolism in T cells is critical for a productive immune response. However, when dysregulated by intrinsic or extrinsic metabolic factors, T cells may contribute to a wide spectrum of diseases, such as cancers and autoimmune diseases. However, the metabolic regulation of T cells remains incompletely understood. Here, we show that MYO1F is required for human and mouse T-cell activation after TCR stimulation and that T-cell-specific Myo1f knockout mice exhibit an increased tumor burden and attenuated EAE severity due to impaired T-cell activation in vivo. Mechanistically, after TCR stimulation, MYO1F is phosphorylated by LCK at tyrosines 607 and 634, which is critical for glyceraldehyde-3-phosphate dehydrogenase (GAPDH) acetylation at Lys84, 86 and 227 mediated by α-TAT1, which is an acetyltransferase, and these processes are important for its activation, cellular glycolysis and thus the effector function of T cells. Importantly, we show that a fusion protein of VAV1-MYO1F, a recurrent peripheral T-cell lymphoma (PTCL)-associated oncogenic protein, promotes hyperacetylation of GAPDH and its activation, which leads to aberrant glycolysis and T-cell proliferation, and that inhibition of the activity of GAPDH significantly limits T-cell activation and proliferation and extends the survival of hVAV1-MYO1F knock-in mice. Moreover, hyperacetylation of GAPDH was confirmed in human PTCL patient samples containing the VAV1-MYO1F gene fusion. Overall, this study revealed not only the mechanisms by which MYO1F regulates T-cell metabolism and VAV1-MYO1F fusion-induced PTCL but also promising therapeutic targets for the treatment of PTCL.
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Acknowledgements
This investigation was supported by grants from the National Science Fund for Distinguished Young Scholars (82225029, to C.H.W.); the Youth Fund of the National Natural Science Foundation of China (82302628, to Y.Y.D., 82301989, to R.R.H., 82301987 to B.Z. and 82402704 to Y.Y.L.); the Original Exploration Program of the National Natural Science Foundation of China (82150102, to C.H.W.); the National Key Research and Development Program of China (2020YFA0710700, to C.H.W.); the Postdoctoral Foundation of China (2022M720658, to Y.Y.D., and 2022M720659 to R.R.H.); the Sichuan Postdoctoral Innovation Plan (BX202202, to Y.Y.D.); the Postdoctoral Foundation of Sichuan Provincial People’s Hospital (2022BH01, to R.R.H. and 2022BH07, to M.Y.); and the Postdoctoral Foundation of Sichuan Province (TB2022086, to R.R.H., TB2023092, to L.Y.F.).
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ZHC and HPW performed the experiments with the assistance of XF, YYD, MY, RRH, TP, RG, LYF, BZ, GLH, and YW; CYW, and CJZ helped to perform the EAE experiments; XX helped to obtain the human PTCL samples and scored the acetylation level of GAPDH in the samples. ZHC and CHW designed the experiments and analyzed the data; CHW wrote the manuscript and supervised the project with YYD, CJZ, and XX.
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Cui, Z., Wang, H., Feng, X. et al. MYO1F regulates T-cell activation and glycolytic metabolism by promoting the acetylation of GAPDH. Cell Mol Immunol 22, 176–190 (2025). https://doi.org/10.1038/s41423-024-01247-6
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DOI: https://doi.org/10.1038/s41423-024-01247-6