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. 2020 Feb 4;31(2):250-266.e9.
doi: 10.1016/j.cmet.2020.01.006.

Methionine Metabolism Shapes T Helper Cell Responses through Regulation of Epigenetic Reprogramming

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Methionine Metabolism Shapes T Helper Cell Responses through Regulation of Epigenetic Reprogramming

Dominic G Roy et al. Cell Metab. .
Free article

Abstract

Epigenetic modifications on DNA and histones regulate gene expression by modulating chromatin accessibility to transcription machinery. Here we identify methionine as a key nutrient affecting epigenetic reprogramming in CD4+ T helper (Th) cells. Using metabolomics, we showed that methionine is rapidly taken up by activated T cells and serves as the major substrate for biosynthesis of the universal methyl donor S-adenosyl-L-methionine (SAM). Methionine was required to maintain intracellular SAM pools in T cells. Methionine restriction reduced histone H3K4 methylation (H3K4me3) at the promoter regions of key genes involved in Th17 cell proliferation and cytokine production. Applied to the mouse model of multiple sclerosis (experimental autoimmune encephalomyelitis), dietary methionine restriction reduced the expansion of pathogenic Th17 cells in vivo, leading to reduced T cell-mediated neuroinflammation and disease onset. Our data identify methionine as a key nutritional factor shaping Th cell proliferation and function in part through regulation of histone methylation.

Keywords: EAE; SAM; T cells; Th17 cells; histone methylation; inflammation; metabolism; methionine.

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Conflict of interest statement

Declaration of Interests S.H., V.C., and T.P.R. are employees and shareholders of Agios Pharmaceuticals. R.M.J. is an employee of Genentech. M.S. is an employee of Rheos Therapeutics. R.G.J. is a consultant to Agios Pharmaceuticals and is a shareholder and member of the scientific advisory board of Immunomet Therapeutics.

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