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Chen D, Nemazanyy I, Peulen O, Shostak K, Xu X, Tang SC, Wathieu C, Turchetto S, Tielens S, Nguyen L, Close P, Desmet C, Klein S, Florin A, Büttner R, Petrellis G, Dewals B, Chariot A. Elp3-mediated codon-dependent translation promotes mTORC2 activation and regulates macrophage polarization. EMBO J 2022; 41:e109353. [PMID: 35920020 PMCID: PMC9475509 DOI: 10.15252/embj.2021109353] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 07/05/2022] [Accepted: 07/07/2022] [Indexed: 12/24/2022] Open
Abstract
Macrophage polarization is a process whereby macrophages acquire distinct effector states (M1 or M2) to carry out multiple and sometimes opposite functions. We show here that translational reprogramming occurs during macrophage polarization and that this relies on the Elongator complex subunit Elp3, an enzyme that modifies the wobble uridine base U34 in cytosolic tRNAs. Elp3 expression is downregulated by classical M1‐activating signals in myeloid cells, where it limits the production of pro‐inflammatory cytokines via FoxO1 phosphorylation, and attenuates experimental colitis in mice. In contrast, alternative M2‐activating signals upregulate Elp3 expression through a PI3K‐ and STAT6‐dependent signaling pathway. The metabolic reprogramming linked to M2 macrophage polarization relies on Elp3 and the translation of multiple candidates, including the mitochondrial ribosome large subunit proteins Mrpl3, Mrpl13, and Mrpl47. By promoting translation of its activator Ric8b in a codon‐dependent manner, Elp3 also regulates mTORC2 activation. Elp3 expression in myeloid cells further promotes Wnt‐driven tumor initiation in the intestine by maintaining a pool of tumor‐associated macrophages exhibiting M2 features. Collectively, our data establish a functional link between tRNA modifications, mTORC2 activation, and macrophage polarization.
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Affiliation(s)
- Dawei Chen
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Ivan Nemazanyy
- Platform for Metabolic Analyses, Structure Fédérative de Recherche Necker, INSERM US24/CNRS UMS 3633, Paris, France
| | - Olivier Peulen
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Metastasis Research Laboratory (MRL), GIGA Cancer, University of Liege, Liège, Belgium
| | - Kateryna Shostak
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Xinyi Xu
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Seng Chuan Tang
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Caroline Wathieu
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Silvia Turchetto
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium.,Laboratory of Molecular Regulation of Neurogenesis, University of Liege, Liege, Belgium
| | - Sylvia Tielens
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium
| | - Laurent Nguyen
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium.,Laboratory of Molecular Regulation of Neurogenesis, University of Liege, Liege, Belgium
| | - Pierre Close
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium.,Laboratory of Cancer Signaling, University of Liege, Liege, Belgium.,Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wavres, Belgium
| | - Christophe Desmet
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Cellular and Molecular Immunology, GIGA-I3, University of Liege, Liège, Belgium
| | - Sebastian Klein
- Institute for Pathology-University Hospital Cologne, Köln, Germany
| | - Alexandra Florin
- Institute for Pathology-University Hospital Cologne, Köln, Germany
| | - Reinhard Büttner
- Institute for Pathology-University Hospital Cologne, Köln, Germany
| | - Georgios Petrellis
- Laboratory of Immunology-Vaccinology, Fundamental and Applied Research in Animals and Health (FARAH), University of Liege, Liège, Belgium
| | - Benjamin Dewals
- Laboratory of Immunology-Vaccinology, Fundamental and Applied Research in Animals and Health (FARAH), University of Liege, Liège, Belgium
| | - Alain Chariot
- Interdisciplinary Cluster for Applied Genoproteomics, University of Liege, Liege, Belgium.,Laboratory of Medical Chemistry, University of Liege, Liege, Belgium.,GIGA Stem Cells, University of Liege, Liege, Belgium.,Walloon Excellence in Life Sciences and Biotechnology (WELBIO), Wavres, Belgium
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