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1. Dichotomous metabolic networks govern human ILC2 proliferation and function

Author

Carys A. Croft, James P. Di Santo, Antonia Cama, Solenne Marie, Carmen Buchrieser, Davide Topazio, Olimpia Musumeci, Valerie Dardalhon, Laura Surace, Naomi Taylor, Jean-Marc Doisne, Vincent Guillemot, Natalia Petrosemoli, Pedro Escoll, Ido Amit, Anna Thaller, Immunité Innée - Innate Immunity, Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), École Doctorale Bio Sorbonne Paris Cité [Paris] (ED562 - BioSPC), Université Sorbonne Paris Cité (USPC)-Université Paris Cité (UPCité), Biologie des Bactéries intracellulaires - Biology of Intracellular Bacteria, Université Paris Cité (UPCité)-Microbiologie Intégrative et Moléculaire (UMR6047), Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hub Bioinformatique et Biostatistique - Bioinformatics and Biostatistics HUB, Institut Pasteur [Paris] (IP)-Université Paris Cité (UPCité), Institut de Génétique Moléculaire de Montpellier (IGMM), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Department of Otolaryngology, Ospedale 'Giuseppe Mazzini' di Teramo, Department of Maxillofacial and Otolaryngology, Hospital 'Floraspe Renzetti', Department of Immunology [Rehovot, Israël], Weizmann Institute of Science [Rehovot, Israël], Department of Clinical and Experimental Medicine [Messina, Italy], University of Messina, The Innate Immunity Unit is supported by grants from the Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Pasteur, the Agence National pour le Recherche (ANR) and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (695467, ILC_REACTIVITY). A.T. is supported by European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 765104. C.B.’s group was supported by the Fondation pour la Recherche Médicale (FRM) grant no. EQU201903007847 and the grant no. ANR-10-LABX-62-IBEID. L.S. was supported by an SNSF-Early PostDoc. Mobility fellowship and a Marie Curie grant (H2020- MSCA-IF-2017)., We thank all the members of the Innate Immunity Unit for helpful discussions, the Centre de Recherche Translationnelle and the logistic department of Institut Pasteur. We thank the CB-UTechS platform for cytometry support and the Imagopole-CiTech (part of France-BioImaging supported by ANR grant no. ANR-10-INSB-04-01, Conseil de la Region Ile-de-France, FRM) for technical support., The study was conceptualized by L.S. and J.P.D. Experiments were coordinated by L.S. FACS and subsequent analyses were performed by L.S., C.A.C., A.T., J.-M.D. and S.M. Confocal microscopy analysis was performed by P.E., C.B. and L.S. Bioinformatic analyses were performed by N.P. and V.G. RNA-seq experiments were conducted by I.A. O.M., V.D., N.T., D.T. and A.C. provided resources. L.S. and J.P.D. wrote the paper. Funding was acquired by L.S. and J.P.D., and the study was supervised by J.P.D., ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), ANR-10-LABX-0062,IBEID,Integrative Biology of Emerging Infectious Diseases(2010), European Project: 695467,H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC) ,ILC_REACTIVITY(2016), European Project: 765104,MATURE-NK, European Project: 796004,BIF-SCV, Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), École Doctorale Bio Sorbonne Paris Cité [Paris] (ED BioSPC), Université Sorbonne Paris Cité (USPC)-Université de Paris (UP), Institut Pasteur [Paris]-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), and Hospital 'Giuseppe Mazzini'

Subjects
Letter, Mitochondrial Diseases, Lymphocyte Activation, 0302 clinical medicine, Immunology and Allergy, Glycolysis, Receptor, Tissue homeostasis, Cells, Cultured, 0303 health sciences, MESH: Cytokines, Innate lymphoid cell, MESH: Energy Metabolism, MESH: Arginine, MESH: Mitochondrial Diseases, MESH: Case-Control Studies, Cell biology, Mitochondria, Phenotype, [SDV.IMM]Life Sciences [q-bio]/Immunology, Cytokines, MESH: Immunity, Innate, MESH: Cells, Cultured, MESH: Interleukin-33, MESH: Mitochondria, Immunology, Innate lymphoid cells, Oxidative phosphorylation, Biology, MESH: Phenotype, Arginine, 03 medical and health sciences, Th2 Cells, MESH: Th2 Cells, MESH: Cell Proliferation, Humans, MESH: Lymphocyte Activation, PI3K/AKT/mTOR pathway, 030304 developmental biology, Cell Proliferation, MESH: Humans, Interleukins, Metabolism, Interleukin-33, Immunity, Innate, Metabolic pathway, Case-Control Studies, Energy Metabolism, Amino Acids, Branched-Chain, 030215 immunology, MESH: Amino Acids, Branched-Chain
Abstract

Group 2 innate lymphoid cells (ILC2s) represent innate homologs of type 2 helper T cells (TH2) that participate in immune defense and tissue homeostasis through production of type 2 cytokines. While T lymphocytes metabolically adapt to microenvironmental changes, knowledge of human ILC2 metabolism is limited, and its key regulators are unknown. Here, we show that circulating ‘naive’ ILC2s have an unexpected metabolic profile with a higher level of oxidative phosphorylation (OXPHOS) than natural killer (NK) cells. Accordingly, ILC2s are severely reduced in individuals with mitochondrial disease (MD) and impaired OXPHOS. Metabolomic and nutrient receptor analysis revealed ILC2 uptake of amino acids to sustain OXPHOS at steady state. Following activation with interleukin-33 (IL-33), ILC2s became highly proliferative, relying on glycolysis and mammalian target of rapamycin (mTOR) to produce IL-13 while continuing to fuel OXPHOS with amino acids to maintain cellular fitness and proliferation. Our results suggest that proliferation and function are metabolically uncoupled in human ILC2s, offering new strategies to target ILC2s in disease settings., ILC2 metabolism has been largely unexplored. Di Santo and colleagues examine metabolic profiles from naive and cytokine-activated ILC2s and find that IL-33-triggered ILC2s rely on distinct metabolic pathways to sustain proliferation and function.

Published
2021
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2. PGC-1β: A Regulator of Mitochondrial Function with Subtle Roles in Energy Metabolism

Author

Adrienn Kis, Mark Campbell, Mohammad Bohlooly-Y, Keira Curtis, Barbara Cannon, Matej Orešič, E. Dale Abel, Vlad G. Zaha, Gema Medina-Gomez, Sheldon E. Litwin, Mercedes Jimenez-Linan, Antonio Vidal-Puig, Sihem Boudina, Kimberly T Fountain, Leonard H Storlien, Miguel López, Margaret Blount, Ping Hu, Helena M. Feldmann, Christopher J. Lelliott, Mikael Bjursell, Natasa Petrovic, Dongfang Zhang, Nadeene Parker, Maria Strömstedt, Aline Meirhaeghe, Michael Snaith, Autard, Delphine, Department of Clinical Biochemistry, University of Cambridge [UK] (CAM), AstraZeneca, The Wenner-Gren Institute, Stockholm University, Division of Cardiology, University of Utah, Division of Endocrinology, Metabolism, and Diabetes, Epidémiologie des maladies chroniques : impact des interactions gène environnement sur la santé des populations, Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille, Droit et Santé, Technical Research Centre of Finland, VTT Technical Research Centre of Finland (VTT), The work presented in this paper was supported by grants from the British Heart Foundation, Wellcome Trust Integrative Physiology, and Diabetes Wellness Research Foundation (to AVP lab), and NIH grants RO1HL73167 and UO1HL70525 from the National Institutes of Health and the Ben and Iris Margolis Foundation (to EDA - Established Investigator of the American Heart Association). Support was from the European Union (DLARFID), the Swedish Research Council, and the Swedish Cancer Society (to BC lab).

Subjects
Male, MESH: Cold Temperature, Adipose tissue, White adipose tissue, Mitochondrion, MESH: Mice, Knockout, Mitochondria, Heart, chemistry.chemical_compound, Mice, Norepinephrine, 0302 clinical medicine, Adipose Tissue, Brown, Heart Rate, Brown adipose tissue, Body Fat Distribution, Diabetes/Endocrinology/Metabolism, MESH: Thermogenesis, MESH: Animals, Biology (General), MESH: Heart Rate, Mice, Knockout, Mammals, 0303 health sciences, MESH: Muscle, Skeletal, General Neuroscience, MESH: Energy Metabolism, Heart, Thermogenesis, Mus (Mouse), Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha, MESH: Gene Expression Regulation, Mitochondria, Cold Temperature, medicine.anatomical_structure, Liver, MESH: Adipose Tissue, White, Synopsis, Female, MESH: Mitochondria, Heart, General Agricultural and Biological Sciences, Metabolic Networks and Pathways, Research Article, MESH: Electron Transport Chain Complex Proteins, medicine.medical_specialty, QH301-705.5, MESH: Mitochondria, MESH: Trans-Activators, Adipose Tissue, White, Biology, MESH: Diet, Atherogenic, MESH: Adipose Tissue, Brown, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Adrenergic Agents, Internal medicine, MESH: Norepinephrine, medicine, [SDV.BBM] Life Sciences [q-bio]/Biochemistry, Molecular Biology, Animals, MESH: Body Fat Distribution, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Muscle, Skeletal, MESH: Mice, 030304 developmental biology, Soleus muscle, General Immunology and Microbiology, Triglyceride, Body Weight, medicine.disease, MESH: Adrenergic Agents, MESH: Male, MESH: Body Weight, MESH: Heart, Endocrinology, chemistry, Electron Transport Chain Complex Proteins, Gene Expression Regulation, MESH: Metabolic Networks and Pathways, Trans-Activators, Diet, Atherogenic, Steatosis, Energy Metabolism, MESH: Female, 030217 neurology & neurosurgery, Transcription Factors, MESH: Liver
Abstract

The transcriptional coactivator peroxisome proliferator-activated receptor-gamma coactivator-1β (PGC-1β) has been implicated in important metabolic processes. A mouse lacking PGC-1β (PGC1βKO) was generated and phenotyped using physiological, molecular, and bioinformatic approaches. PGC1βKO mice are generally viable and metabolically healthy. Using systems biology, we identified a general defect in the expression of genes involved in mitochondrial function and, specifically, the electron transport chain. This defect correlated with reduced mitochondrial volume fraction in soleus muscle and heart, but not brown adipose tissue (BAT). Under ambient temperature conditions, PGC-1β ablation was partially compensated by up-regulation of PGC-1α in BAT and white adipose tissue (WAT) that lead to increased thermogenesis, reduced body weight, and reduced fat mass. Despite their decreased fat mass, PGC1βKO mice had hypertrophic adipocytes in WAT. The thermogenic role of PGC-1β was identified in thermoneutral and cold-adapted conditions by inadequate responses to norepinephrine injection. Furthermore, PGC1βKO hearts showed a blunted chronotropic response to dobutamine stimulation, and isolated soleus muscle fibres from PGC1βKO mice have impaired mitochondrial function. Lack of PGC-1β also impaired hepatic lipid metabolism in response to acute high fat dietary loads, resulting in hepatic steatosis and reduced lipoprotein-associated triglyceride and cholesterol content. Altogether, our data suggest that PGC-1β plays a general role in controlling basal mitochondrial function and also participates in tissue-specific adaptive responses during metabolic stress., The authors conduct an in-depth analysis of a PGC-1β knockout mouse; these animals posses specific defects in basal mitochondrial function and adaptation to metabolic stress.

Published
2006
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