Abstract
Metabolic pathways, once seen as a mere consequence of cell states, have emerged as active players in dictating different cellular events such as proliferation, self-renewal, and differentiation. Several studies have reported a role for folate-dependent one-carbon (1C) metabolism in stem cells; however, its exact mode of action and how it interacts with other cues are largely unknown. Here, we report a link between the Eph:ephrin cell-cell communication pathway and 1C metabolism in controlling neural stem cell differentiation. Transcriptional and functional analyses following ephrin stimulation revealed alterations in folate metabolism-related genes and enzymatic activity. Invitro and invivo data indicate that Eph-B forward signaling alters the methylation state of H3K4 by regulating 1C metabolism and locksneural stem cell in a differentiation-ready state. Ourstudy highlights a functional link between cell-cell communication, metabolism, and epigenomic remodeling in the control of stem cell self-renewal.
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