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The molecular circuits by which antigens activate quiescent T cells remain poorly understood. We combined temporal profiling of the whole proteome and phosphoproteome via multiplexed isobaric labeling proteomics technology, computational pipelines for integrating multi-omics datasets, and functional perturbation to systemically reconstruct regulatory networks underlying T cell activation. T cell receptors...
Reprogramming of cellular metabolism is crucial for T cells responding to environmental cues. Blagih et al. (2015) reveal that the kinase AMPK directs metabolic adaption of effector T cells upon nutrient limitation and contributes to immune responses in vivo.
Naive T cells respond to antigen stimulation by exiting from quiescence and initiating clonal expansion and functional differentiation, but the control mechanism is elusive. Here we describe that Raptor-mTORC1-dependent metabolic reprogramming is a central determinant of this transitional process. Loss of Raptor abrogated T cell priming and T helper 2 (Th2) cell differentiation, although Raptor function...
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