1
|
Simula L, Fumagalli M, Vimeux L, Rajnpreht I, Icard P, Birsen G, An D, Pendino F, Rouault A, Bercovici N, Damotte D, Lupo-Mansuet A, Alifano M, Alves-Guerra MC, Donnadieu E. Mitochondrial metabolism sustains CD8 + T cell migration for an efficient infiltration into solid tumors. Nat Commun 2024; 15:2203. [PMID: 38467616 PMCID: PMC10928223 DOI: 10.1038/s41467-024-46377-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Accepted: 02/26/2024] [Indexed: 03/13/2024] Open
Abstract
The ability of CD8+ T cells to infiltrate solid tumors and reach cancer cells is associated with improved patient survival and responses to immunotherapy. Thus, identifying the factors controlling T cell migration in tumors is critical, so that strategies to intervene on these targets can be developed. Although interstitial motility is a highly energy-demanding process, the metabolic requirements of CD8+ T cells migrating in a 3D environment remain unclear. Here, we demonstrate that the tricarboxylic acid (TCA) cycle is the main metabolic pathway sustaining human CD8+ T cell motility in 3D collagen gels and tumor slices while glycolysis plays a more minor role. Using pharmacological and genetic approaches, we report that CD8+ T cell migration depends on the mitochondrial oxidation of glucose and glutamine, but not fatty acids, and both ATP and ROS produced by mitochondria are required for T cells to migrate. Pharmacological interventions to increase mitochondrial activity improve CD8+ T cell intratumoral migration and CAR T cell recruitment into tumor islets leading to better control of tumor growth in human xenograft models. Our study highlights the rationale of targeting mitochondrial metabolism to enhance the migration and antitumor efficacy of CAR T cells in treating solid tumors.
Collapse
Affiliation(s)
- Luca Simula
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France.
| | - Mattia Fumagalli
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Lene Vimeux
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Irena Rajnpreht
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Philippe Icard
- Université de Normandie, UNICAEN, Inserm U1086 Interdisciplinary Research Unit for Cancer Prevention and Treatment, Caen, France
- Thoracic Surgery Department, Cochin Hospital, APHP-Centre, Université Paris-Cité, Paris, France
| | - Gary Birsen
- Department of Pneumology, Thoracic Oncology Unit, Cochin Hospital, APHP-Centre, Université Paris-Cité, 75014, Paris, France
| | - Dongjie An
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Frédéric Pendino
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Adrien Rouault
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Nadège Bercovici
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France
| | - Diane Damotte
- Department of Pathology, Cochin Hospital, APHP-Centre, Université Paris-Cité, 75014, Paris, France
| | - Audrey Lupo-Mansuet
- Department of Pathology, Cochin Hospital, APHP-Centre, Université Paris-Cité, 75014, Paris, France
| | - Marco Alifano
- Thoracic Surgery Department, Cochin Hospital, APHP-Centre, Université Paris-Cité, Paris, France
- Inserm U1138, Integrative Cancer Immunology Unit, 75006, Paris, France
| | | | - Emmanuel Donnadieu
- Institut Cochin, Inserm U1016, CNRS UMR8104, Université Paris-Cité, Equipe labellisée "Ligue contre le Cancer", Paris, 75014, France.
| |
Collapse
|
2
|
Benichou E, Seffou B, Topçu S, Renoult O, Lenoir V, Planchais J, Bonner C, Postic C, Prip-Buus C, Pecqueur C, Guilmeau S, Alves-Guerra MC, Dentin R. The transcription factor ChREBP Orchestrates liver carcinogenesis by coordinating the PI3K/AKT signaling and cancer metabolism. Nat Commun 2024; 15:1879. [PMID: 38424041 PMCID: PMC10904844 DOI: 10.1038/s41467-024-45548-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 01/24/2024] [Indexed: 03/02/2024] Open
Abstract
Cancer cells integrate multiple biosynthetic demands to drive unrestricted proliferation. How these cellular processes crosstalk to fuel cancer cell growth is still not fully understood. Here, we uncover the mechanisms by which the transcription factor Carbohydrate responsive element binding protein (ChREBP) functions as an oncogene during hepatocellular carcinoma (HCC) development. Mechanistically, ChREBP triggers the expression of the PI3K regulatory subunit p85α, to sustain the activity of the pro-oncogenic PI3K/AKT signaling pathway in HCC. In parallel, increased ChREBP activity reroutes glucose and glutamine metabolic fluxes into fatty acid and nucleic acid synthesis to support PI3K/AKT-mediated HCC growth. Thus, HCC cells have a ChREBP-driven circuitry that ensures balanced coordination between PI3K/AKT signaling and appropriate cell anabolism to support HCC development. Finally, pharmacological inhibition of ChREBP by SBI-993 significantly suppresses in vivo HCC tumor growth. Overall, we show that targeting ChREBP with specific inhibitors provides an attractive therapeutic window for HCC treatment.
Collapse
Affiliation(s)
- Emmanuel Benichou
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Bolaji Seffou
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Selin Topçu
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Ophélie Renoult
- Nantes Université, INSERM U1307, CNRS 6075, CRCI2NA, Nantes, France
| | - Véronique Lenoir
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Julien Planchais
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Caroline Bonner
- Institut Pasteur de Lille, Lille, France
- INSERM, U1011, Lille, France
- European Genomic Institute for Diabetes, Lille, France
- Université de Lille, Lille, France
| | - Catherine Postic
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Carina Prip-Buus
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | - Claire Pecqueur
- Nantes Université, INSERM U1307, CNRS 6075, CRCI2NA, Nantes, France
| | - Sandra Guilmeau
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France
| | | | - Renaud Dentin
- Université Paris Cité, Institut Cochin, INSERM, CNRS, F-75014, Paris, France.
- Institut Cochin, Faculté de Médecine 3ème étage, 24 Rue du Faubourg Saint Jacques, 75014, Paris, France.
| |
Collapse
|
3
|
Luby A, Alves-Guerra MC. UCP2 as a Cancer Target through Energy Metabolism and Oxidative Stress Control. Int J Mol Sci 2022; 23:ijms232315077. [PMID: 36499405 PMCID: PMC9735768 DOI: 10.3390/ijms232315077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/25/2022] [Accepted: 11/27/2022] [Indexed: 12/02/2022] Open
Abstract
Despite numerous therapies, cancer remains one of the leading causes of death worldwide due to the lack of markers for early detection and response to treatment in many patients. Technological advances in tumor screening and renewed interest in energy metabolism have allowed us to identify new cellular players in order to develop personalized treatments. Among the metabolic actors, the mitochondrial transporter uncoupling protein 2 (UCP2), whose expression is increased in many cancers, has been identified as an interesting target in tumor metabolic reprogramming. Over the past decade, a better understanding of its biochemical and physiological functions has established a role for UCP2 in (1) protecting cells from oxidative stress, (2) regulating tumor progression through changes in glycolytic, oxidative and calcium metabolism, and (3) increasing antitumor immunity in the tumor microenvironment to limit cancer development. With these pleiotropic roles, UCP2 can be considered as a potential tumor biomarker that may be interesting to target positively or negatively, depending on the type, metabolic status and stage of tumors, in combination with conventional chemotherapy or immunotherapy to control tumor development and increase response to treatment. This review provides an overview of the latest published science linking mitochondrial UCP2 activity to the tumor context.
Collapse
|
4
|
Sancerni T, Renoult O, Luby A, Caradeuc C, Lenoir V, Croyal M, Ransy C, Aguilar E, Postic C, Bertho G, Dentin R, Prip-Buus C, Pecqueur C, Alves-Guerra MC. UCP2 silencing restrains leukemia cell proliferation through glutamine metabolic remodeling. Front Immunol 2022; 13:960226. [PMID: 36275699 PMCID: PMC9582289 DOI: 10.3389/fimmu.2022.960226] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/20/2022] [Indexed: 11/30/2022] Open
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy derived from early T cell progenitors. Since relapsed T-ALL is associated with a poor prognosis improving initial treatment of patients is essential to avoid resistant selection of T-ALL. During initiation, development, metastasis and even in response to chemotherapy, tumor cells face strong metabolic challenges. In this study, we identify mitochondrial UnCoupling Protein 2 (UCP2) as a tricarboxylic acid (TCA) cycle metabolite transporter controlling glutamine metabolism associated with T-ALL cell proliferation. In T-ALL cell lines, we show that UCP2 expression is controlled by glutamine metabolism and is essential for their proliferation. Our data show that T-ALL cell lines differ in their substrate dependency and their energetic metabolism (glycolysis and oxidative). Thus, while UCP2 silencing decreases cell proliferation in all leukemia cells, it also alters mitochondrial respiration of T-ALL cells relying on glutamine-dependent oxidative metabolism by rewiring their cellular metabolism to glycolysis. In this context, the function of UCP2 in the metabolite export of malate enables appropriate TCA cycle to provide building blocks such as lipids for cell growth and mitochondrial respiration. Therefore, interfering with UCP2 function can be considered as an interesting strategy to decrease metabolic efficiency and proliferation rate of leukemia cells.
Collapse
Affiliation(s)
| | | | - Angèle Luby
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | | | - Véronique Lenoir
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - Mikael Croyal
- Nantes Université, INSERM, CNRS, CRCI2NA, Nantes, France
| | - Céline Ransy
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - Esther Aguilar
- Asociación Española Contra el Cáncer (AECC), Fundación Científica AECC, Madrid, Spain
| | - Catherine Postic
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | | | - Renaud Dentin
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | - Carina Prip-Buus
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
| | | | - Marie-Clotilde Alves-Guerra
- Université Paris Cité, CNRS, INSERM, Institut Cochin, Paris, France
- *Correspondence: Marie-Clotilde Alves-Guerra,
| |
Collapse
|
5
|
Luby A, Alves-Guerra MC. Targeting Metabolism to Control Immune Responses in Cancer and Improve Checkpoint Blockade Immunotherapy. Cancers (Basel) 2021; 13:cancers13235912. [PMID: 34885023 PMCID: PMC8656934 DOI: 10.3390/cancers13235912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 11/17/2021] [Accepted: 11/19/2021] [Indexed: 12/18/2022] Open
Abstract
Over the past decade, advances in cancer immunotherapy through PD1-PDL1 and CTLA4 immune checkpoint blockade have revolutionized the management of cancer treatment. However, these treatments are inefficient for many cancers, and unfortunately, few patients respond to these treatments. Indeed, altered metabolic pathways in the tumor play a pivotal role in tumor growth and immune response. Thus, the immunosuppressive tumor microenvironment (TME) reprograms the behavior of immune cells by altering their cellular machinery and nutrient availability to limit antitumor functions. Today, thanks to a better understanding of cancer metabolism, immunometabolism and immune checkpoint evasion, the development of new therapeutic approaches targeting the energy metabolism of cancer or immune cells greatly improve the efficacy of immunotherapy in different cancer models. Herein, we highlight the changes in metabolic pathways that regulate the differentiation of pro- and antitumor immune cells and how TME-induced metabolic stress impedes their antitumor activity. Finally, we propose some drug strategies to target these pathways in the context of cancer immunotherapy.
Collapse
|
6
|
Bertolin G, Alves-Guerra MC, Cheron A, Burel A, Prigent C, Le Borgne R, Tramier M. Mitochondrial Aurora kinase A induces mitophagy by interacting with MAP1LC3 and Prohibitin 2. Life Sci Alliance 2021; 4:4/6/e202000806. [PMID: 33820826 PMCID: PMC8046421 DOI: 10.26508/lsa.202000806] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 02/10/2021] [Accepted: 03/25/2021] [Indexed: 12/29/2022] Open
Abstract
The multifunctional Ser/Thr kinase AURKA uses the Inner Mitochondrial Membrane receptor PHB2 and MAP1LC3 as a signalling platform to orchestrate the elimination of dysfunctional mitochondria. Epithelial and haematologic tumours often show the overexpression of the serine/threonine kinase AURKA. Recently, AURKA was shown to localise at mitochondria, where it regulates mitochondrial dynamics and ATP production. Here we define the molecular mechanisms of AURKA in regulating mitochondrial turnover by mitophagy. AURKA triggers the degradation of Inner Mitochondrial Membrane/matrix proteins by interacting with core components of the autophagy pathway. On the inner mitochondrial membrane, the kinase forms a tripartite complex with MAP1LC3 and the mitophagy receptor PHB2, which triggers mitophagy in a PARK2/Parkin–independent manner. The formation of the tripartite complex is induced by the phosphorylation of PHB2 on Ser39, which is required for MAP1LC3 to interact with PHB2. Last, treatment with the PHB2 ligand xanthohumol blocks AURKA-induced mitophagy by destabilising the tripartite complex and restores normal ATP production levels. Altogether, these data provide evidence for a role of AURKA in promoting mitophagy through the interaction with PHB2 and MAP1LC3. This work paves the way to the use of function-specific pharmacological inhibitors to counteract the effects of the overexpression of AURKA in cancer.
Collapse
Affiliation(s)
- Giulia Bertolin
- University of Rennes, Centre National de la Recherche Scientifique (CNRS), (IGDR) Genetics and Development Institute of Rennes, Unité Mixte de Recherche (UMR) 6290, Rennes, France
| | - Marie-Clotilde Alves-Guerra
- Université de Paris, Institut Cochin, Institut National de la Santé et de la Recherche Médicale (INSERM), CNRS, Paris, France
| | - Angélique Cheron
- University of Rennes, Centre National de la Recherche Scientifique (CNRS), (IGDR) Genetics and Development Institute of Rennes, Unité Mixte de Recherche (UMR) 6290, Rennes, France
| | - Agnès Burel
- University of Rennes, MRic CNRS, INSERM, Structure Fédérative de Recherche (SFR) Biosit, UMS 3480, Rennes, France
| | - Claude Prigent
- University of Rennes, Centre National de la Recherche Scientifique (CNRS), (IGDR) Genetics and Development Institute of Rennes, Unité Mixte de Recherche (UMR) 6290, Rennes, France
| | - Roland Le Borgne
- University of Rennes, Centre National de la Recherche Scientifique (CNRS), (IGDR) Genetics and Development Institute of Rennes, Unité Mixte de Recherche (UMR) 6290, Rennes, France
| | - Marc Tramier
- University of Rennes, Centre National de la Recherche Scientifique (CNRS), (IGDR) Genetics and Development Institute of Rennes, Unité Mixte de Recherche (UMR) 6290, Rennes, France
| |
Collapse
|
7
|
van Dierendonck XAMH, Sancerni T, Alves-Guerra MC, Stienstra R. The role of uncoupling protein 2 in macrophages and its impact on obesity-induced adipose tissue inflammation and insulin resistance. J Biol Chem 2021; 295:17535-17548. [PMID: 33453996 DOI: 10.1074/jbc.ra120.014868] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/07/2020] [Indexed: 12/22/2022] Open
Abstract
The development of a chronic, low-grade inflammation originating from adipose tissue in obese subjects is widely recognized to induce insulin resistance, leading to the development of type 2 diabetes. The adipose tissue microenvironment drives specific metabolic reprogramming of adipose tissue macrophages, contributing to the induction of tissue inflammation. Uncoupling protein 2 (UCP2), a mitochondrial anion carrier, is thought to separately modulate inflammatory and metabolic processes in macrophages and is up-regulated in macrophages in the context of obesity and diabetes. Here, we investigate the role of UCP2 in macrophage activation in the context of obesity-induced adipose tissue inflammation and insulin resistance. Using a myeloid-specific knockout of UCP2 (Ucp2ΔLysM), we found that UCP2 deficiency significantly increases glycolysis and oxidative respiration, both unstimulated and after inflammatory conditions. Strikingly, fatty acid loading abolished the metabolic differences between Ucp2ΔLysM macrophages and their floxed controls. Furthermore, Ucp2ΔLysM macrophages show attenuated pro-inflammatory responses toward Toll-like receptor-2 and -4 stimulation. To test the relevance of macrophage-specific Ucp2 deletion in vivo, Ucp2ΔLysM and Ucp2fl/fl mice were rendered obese and insulin resistant through high-fat feeding. Although no differences in adipose tissue inflammation or insulin resistance was found between the two genotypes, adipose tissue macrophages isolated from diet-induced obese Ucp2ΔLysM mice showed decreased TNFα secretion after ex vivo lipopolysaccharide stimulation compared with their Ucp2fl/fl littermates. Together, these results demonstrate that although UCP2 regulates both metabolism and the inflammatory response of macrophages, its activity is not crucial in shaping macrophage activation in the adipose tissue during obesity-induced insulin resistance.
Collapse
Affiliation(s)
- Xanthe A M H van Dierendonck
- Nutrition, Metabolism, and Genomics Group, Division of Human Nutrition and Health, Wageningen University, Wageningen, The Netherlands; Department of Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | | | | | - Rinke Stienstra
- Nutrition, Metabolism, and Genomics Group, Division of Human Nutrition and Health, Wageningen University, Wageningen, The Netherlands; Department of Internal Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
| |
Collapse
|
8
|
Aguilar E, Esteves P, Sancerni T, Lenoir V, Aparicio T, Bouillaud F, Dentin R, Prip-Buus C, Ricquier D, Pecqueur C, Guilmeau S, Alves-Guerra MC. UCP2 Deficiency Increases Colon Tumorigenesis by Promoting Lipid Synthesis and Depleting NADPH for Antioxidant Defenses. Cell Rep 2020; 28:2306-2316.e5. [PMID: 31461648 PMCID: PMC6718829 DOI: 10.1016/j.celrep.2019.07.097] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 07/01/2019] [Accepted: 07/25/2019] [Indexed: 12/16/2022] Open
Abstract
Colorectal cancer (CRC) is associated with metabolic and redox perturbation. The mitochondrial transporter uncoupling protein 2 (UCP2) controls cell proliferation in vitro through the modulation of cellular metabolism, but the underlying mechanism in tumors in vivo remains unexplored. Using murine intestinal cancer models and CRC patient samples, we find higher UCP2 protein levels in tumors compared to their non-tumoral counterparts. We reveal the tumor-suppressive role of UCP2 as its deletion enhances colon and small intestinal tumorigenesis in AOM/DSS-treated and ApcMin/+ mice, respectively, and correlates with poor survival in the latter model. Mechanistically, UCP2 loss increases levels of oxidized glutathione and proteins in tumors. UCP2 deficiency alters glycolytic pathways while promoting phospholipid synthesis, thereby limiting the availability of NADPH for buffering oxidative stress. We show that UCP2 loss renders colon cells more prone to malignant transformation through metabolic reprogramming and perturbation of redox homeostasis and could favor worse outcomes in CRC. UCP2 protein expression, but not mRNA, is increased in CRC in both mice and humans UCP2 loss promotes AOM/DSS-induced CAC and ApcMin-dependent intestinal cancer UCP2 loss-induced oxidative stress contributes to increased colon tumorigenesis UCP2 deficiency drives an imbalance between lipid metabolism and NADPH homeostasis
Collapse
Affiliation(s)
- Esther Aguilar
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Pauline Esteves
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Tiphaine Sancerni
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, 75205 Paris Cedex 13, France
| | - Véronique Lenoir
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Thomas Aparicio
- Hôpital Avicenne, HUPSSD, APHP, Université Paris 13, 93000 Bobigny, France
| | - Frédéric Bouillaud
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Renaud Dentin
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Carina Prip-Buus
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Daniel Ricquier
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Claire Pecqueur
- CRCINA - INSERM U1232, Université de Nantes, 44007 Nantes, France
| | - Sandra Guilmeau
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
| | - Marie-Clotilde Alves-Guerra
- INSERM U1016, Institut Cochin, 75014 Paris, France; CNRS UMR 8104, 75014 Paris, France; Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France.
| |
Collapse
|
9
|
Garnier D, Renoult O, Alves-Guerra MC, Paris F, Pecqueur C. Glioblastoma Stem- Like Cells, Metabolic Strategy to Kill a Challenging Target. Front Oncol 2019; 9:118. [PMID: 30895167 PMCID: PMC6415584 DOI: 10.3389/fonc.2019.00118] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/11/2019] [Indexed: 01/25/2023] Open
Abstract
Over the years, substantial evidence has definitively confirmed the existence of cancer stem-like cells within tumors such as Glioblastoma (GBM). The importance of Glioblastoma stem-like cells (GSCs) in tumor progression and relapse clearly highlights that cancer eradication requires killing of GSCs that are intrinsically resistant to conventional therapies as well as eradication of the non-GSCs cells since GSCs emergence relies on a dynamic process. The past decade of research highlights that metabolism is a significant player in tumor progression and actually might orchestrate it. The growing interest in cancer metabolism reprogrammation can lead to innovative approaches exploiting metabolic vulnerabilities of cancer cells. These approaches are challenging since they require overcoming the compensatory and adaptive responses of GSCs. In this review, we will summarize the current knowledge on GSCs with a particular focus on their metabolic complexity. We will also discuss potential approaches targeting GSCs metabolism to potentially improve clinical care.
Collapse
Affiliation(s)
| | | | | | - François Paris
- CRCINA, INSERM CNRS, Université de Nantes, Nantes, France.,Institut de Cancérologie de l'Ouest - René Gauducheau, St Herblain, France
| | - Claire Pecqueur
- CRCINA, INSERM CNRS, Université de Nantes, Nantes, France.,LabEx IGO "Immunotherapy, Graft, Oncology", Nantes, France
| |
Collapse
|
10
|
Senni N, Savall M, Cabrerizo Granados D, Alves-Guerra MC, Sartor C, Lagoutte I, Gougelet A, Terris B, Gilgenkrantz H, Perret C, Colnot S, Bossard P. β-catenin-activated hepatocellular carcinomas are addicted to fatty acids. Gut 2019; 68:322-334. [PMID: 29650531 DOI: 10.1136/gutjnl-2017-315448] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 03/26/2018] [Accepted: 04/01/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVES CTNNB1-mutated hepatocellular carcinomas (HCCs) constitute a major part of human HCC and are largely inaccessible to target therapy. Yet, little is known about the metabolic reprogramming induced by β-catenin oncogenic activation in the liver. We aimed to decipher such reprogramming and assess whether it may represent a new avenue for targeted therapy of CTNNB1-mutated HCC. DESIGN We used mice with hepatocyte-specific oncogenic activation of β-catenin to evaluate metabolic reprogramming using metabolic fluxes on tumourous explants and primary hepatocytes. We assess the role of Pparα in knock-out mice and analysed the consequences of fatty acid oxidation (FAO) using etomoxir. We explored the expression of the FAO pathway in an annotated human HCC dataset. RESULTS β-catenin-activated HCC were not glycolytic but intensively oxidised fatty acids. We found that Pparα is a β-catenin target involved in FAO metabolic reprograming. Deletion of Pparα was sufficient to block the initiation and progression of β-catenin-dependent HCC development. FAO was also enriched in human CTNNB1-mutated HCC, under the control of the transcription factor PPARα. CONCLUSIONS FAO induced by β-catenin oncogenic activation in the liver is the driving force of the β-catenin-induced HCC. Inhibiting FAO by genetic and pharmacological approaches blocks HCC development, showing that inhibition of FAO is a suitable therapeutic approach for CTNNB1-mutated HCC.
Collapse
Affiliation(s)
- Nadia Senni
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Mathilde Savall
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - David Cabrerizo Granados
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Marie-Clotilde Alves-Guerra
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Chiara Sartor
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Isabelle Lagoutte
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Angélique Gougelet
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Benoit Terris
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France.,Pathology Department, APHP, Hôpitaux Universitaires Paris Centre, Hôpital Cochin, Paris, France
| | - Hélène Gilgenkrantz
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Christine Perret
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Sabine Colnot
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| | - Pascale Bossard
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,Equipe Labellisée Ligne Nationale Contre le Cancer, Paris, France
| |
Collapse
|
11
|
Bertolin G, Bulteau AL, Alves-Guerra MC, Burel A, Lavault MT, Gavard O, Le Bras S, Gagné JP, Poirier GG, Le Borgne R, Prigent C, Tramier M. Aurora kinase A localises to mitochondria to control organelle dynamics and energy production. eLife 2018; 7:38111. [PMID: 30070631 PMCID: PMC6140714 DOI: 10.7554/elife.38111] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 08/01/2018] [Indexed: 12/18/2022] Open
Abstract
Many epithelial cancers show cell cycle dysfunction tightly correlated with the overexpression of the serine/threonine kinase Aurora A (AURKA). Its role in mitotic progression has been extensively characterised, and evidence for new AURKA functions emerges. Here, we reveal that AURKA is located and imported in mitochondria in several human cancer cell lines. Mitochondrial AURKA impacts on two organelle functions: mitochondrial dynamics and energy production. When AURKA is expressed at endogenous levels during interphase, it induces mitochondrial fragmentation independently from RALA. Conversely, AURKA enhances mitochondrial fusion and ATP production when it is over-expressed. We demonstrate that AURKA directly regulates mitochondrial functions and that AURKA over-expression promotes metabolic reprogramming by increasing mitochondrial interconnectivity. Our work paves the way to anti-cancer therapeutics based on the simultaneous targeting of mitochondrial functions and AURKA inhibition. Structures called mitochondria power cells by turning oxygen and sugar into chemical energy. Each cell can have thousands of mitochondria, which work together to supply changing energy demands. They can fuse together or break apart, forming networks that change size and produce different amounts of energy. Getting the balance right is crucial; if energy levels are too low, the cell will not be able to grow and divide. If energy levels are too high, the cell can grow at a faster rate, which can contribute to the cell becoming cancerous. Although we know that mitochondria provide energy, it is not clear how they communicate to fine-tune the supply. Some clues come from cancer cells that seem dependent on their mitochondria for survival. In these cells, levels of a protein called AURKA are higher than normal. AURKA helps cells to divide, and it interacts with many different proteins. This complexity makes it difficult to work out exactly what AURKA does, but it is possible that it plays a role in energy supply. Bertolin et al. have now investigated whether mitochondria use AURKA to communicate inside human breast cancer cells. Tagging AURKA proteins with a fluorescent marker revealed that it accumulates inside mitochondria. Once it gets there, AURKA changes the shape of the mitochondria, which has dramatic effects on their capacity to produce energy. At normal levels, AURKA causes the mitochondria to fragment, breaking apart into smaller pieces. This maintains their energy output at a normal level. If AURKA levels are too high, the mitochondria fuse together and produce more energy. This means AURKA could help to fuel fast-growing cancer cells. Current drugs that aim to treat cancer by blocking the activity of AURKA show poor results. This is partly due to the fact that the protein has so many different roles in the cell. Finding that AURKA affects mitochondria is the first step in understanding one of its unknown roles. It also suggests the possibility of developing new drugs to change how mitochondria make energy in cancer cells that contain high levels of AURKA.
Collapse
Affiliation(s)
- Giulia Bertolin
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France
| | - Anne-Laure Bulteau
- ENS de Lyon, Lyon, France.,CNRS UMR 5242, Lyon, France.,INRA USC 1370, Lyon, France
| | - Marie-Clotilde Alves-Guerra
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Agnes Burel
- Microscopy Rennes Imaging Centre, SFR Biosit, UMS CNRS 3480- US INSERM 018, Université de Rennes, Rennes, France
| | - Marie-Thérèse Lavault
- Microscopy Rennes Imaging Centre, SFR Biosit, UMS CNRS 3480- US INSERM 018, Université de Rennes, Rennes, France
| | - Olivia Gavard
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France.,Equipes labélisées Ligue Contre Le Cancer, Rennes, France.,Centre de recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Canada
| | - Stephanie Le Bras
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France
| | - Jean-Philippe Gagné
- Centre de recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Canada
| | - Guy G Poirier
- Centre de recherche du CHU de Québec, Faculté de Médecine, Université Laval, Québec, Canada
| | - Roland Le Borgne
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France.,Equipes labélisées Ligue Contre Le Cancer, Rennes, France
| | - Claude Prigent
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France.,Equipes labélisées Ligue Contre Le Cancer, Rennes, France
| | - Marc Tramier
- CNRS, UMR 6290, Rennes, France.,Université de Rennes 1, UBL, Genetics and Development Institute of Rennes (IGDR), Rennes, France.,Microscopy Rennes Imaging Centre, SFR Biosit, UMS CNRS 3480- US INSERM 018, Université de Rennes, Rennes, France
| |
Collapse
|
12
|
Broche B, Ben Fradj S, Aguilar E, Sancerni T, Bénard M, Makaci F, Berthault C, Scharfmann R, Alves-Guerra MC, Duvillié B. Mitochondrial Protein UCP2 Controls Pancreas Development. Diabetes 2018; 67:78-84. [PMID: 29079704 DOI: 10.2337/db17-0118] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 10/23/2017] [Indexed: 11/13/2022]
Abstract
The mitochondrial carrier uncoupling protein (UCP) 2 belongs to the family of the UCPs. Despite its name, it is now accepted that UCP2 is rather a metabolite transporter than a UCP. UCP2 can regulate oxidative stress and/or energetic metabolism. In rodents, UCP2 is involved in the control of α- and β-cell mass as well as insulin and glucagon secretion. Our aim was to determine whether the effects of UCP2 observed on β-cell mass have an embryonic origin. Thus, we used Ucp2 knockout mice. We found an increased size of the pancreas in Ucp2-/- fetuses at embryonic day 16.5, associated with a higher number of α- and β-cells. This phenotype was caused by an increase of PDX1+ progenitor cells. Perinatally, an increase in the proliferation of endocrine cells also participates in their expansion. Next, we analyzed the oxidative stress in the pancreata. We quantified an increased nuclear translocation of nuclear factor erythroid 2-related factor 2 (NRF2) in the mutant, suggesting an increased production of reactive oxygen species (ROS). Phosphorylation of AKT, an ROS target, was also activated in the Ucp2-/- pancreata. Finally, administration of the antioxidant N-acetyl-l-cysteine to Ucp2-/- pregnant mice alleviated the effect of knocking out UCP2 on pancreas development. Together, these data demonstrate that UCP2 controls pancreas development through the ROS-AKT signaling pathway.
Collapse
Affiliation(s)
- Benjamin Broche
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Selma Ben Fradj
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Esther Aguilar
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Tiphaine Sancerni
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
- Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Matthieu Bénard
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Fatna Makaci
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Claire Berthault
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Raphaël Scharfmann
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Marie-Clotilde Alves-Guerra
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Bertrand Duvillié
- INSERM, U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| |
Collapse
|
13
|
Hirose M, Schilf P, Rohde S, Gupta Y, Sancerni T, Alves-Guerra MC, Sina C, Jaster R, Miroux B, Ibrahim SM. The mitochondrial uncoupling protein 2 gene is causal for the spontaneous polycystic liver diseases in mice. Mitochondrion 2017; 42:50-53. [PMID: 29154852 DOI: 10.1016/j.mito.2017.10.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 10/12/2017] [Accepted: 10/26/2017] [Indexed: 11/15/2022]
Abstract
Polycystic liver diseases (PCLDs) are autosomal dominant disorders. To date, 3 genes are known to be associated with the disease, SEC63 and PRKCSH and LRP5. Here, we report that mice deficient in the mitochondrial uncoupling protein 2 gene (Ucp2-/-) spontaneously developed PCLDs when they were over 12months old. Macroscopical observation, blood chemistry as well as histopathological analysis demonstrated the PCLDs found in Ucp2-/- mice were very similar to the findings in human PCLDs. This is the first report describing the gene encoding mitochondrial protein is causative for PCLDs. UCP2 may be a biomarker of the PCLDs in humans.
Collapse
Affiliation(s)
- Misa Hirose
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Germany
| | - Paul Schilf
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Germany
| | - Sarah Rohde
- Division of Gastroenterology, Department of Medicine II, University Medicine Rostock, Rostock, Germany
| | - Yask Gupta
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Germany
| | - Tiphaine Sancerni
- Inserm, U1016, Institut Cochin; Paris Cedex 75014, France; CNRS UMR 8104, Paris Cedex, 75014, France; Université Paris Diderot, Paris Cedex 75014, France
| | - Marie-Clotilde Alves-Guerra
- Inserm, U1016, Institut Cochin; Paris Cedex 75014, France; CNRS UMR 8104, Paris Cedex, 75014, France; Université Paris Descartes UMRS1016, Paris Cedex 75014, France
| | - Christian Sina
- Institute for Nutritional Medicine, University of Lübeck, Lübeck, Germany
| | - Robert Jaster
- Division of Gastroenterology, Department of Medicine II, University Medicine Rostock, Rostock, Germany
| | - Bruno Miroux
- Institute of Physical and Chemical Biology, UMR 7099, CNRS, University Paris-Diderot, Sorbonne Paris Cités, Paris, France
| | - Saleh M Ibrahim
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Germany; College of Medicine, Sharjah Institute for Medical Research, University of Sharjah, AE-27272, United Arab Emirates.
| |
Collapse
|
14
|
Oizel K, Chauvin C, Oliver L, Gratas C, Geraldo F, Jarry U, Scotet E, Rabe M, Alves-Guerra MC, Teusan R, Gautier F, Loussouarn D, Compan V, Martinou JC, Vallette FM, Pecqueur C. Efficient Mitochondrial Glutamine Targeting Prevails Over Glioblastoma Metabolic Plasticity. Clin Cancer Res 2017; 23:6292-6304. [PMID: 28720668 DOI: 10.1158/1078-0432.ccr-16-3102] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 04/24/2017] [Accepted: 07/13/2017] [Indexed: 11/16/2022]
Abstract
Purpose: Glioblastoma (GBM) is the most common and malignant form of primary human brain tumor in adults, with an average survival at diagnosis of 18 months. Metabolism is a new attractive therapeutic target in cancer; however, little is known about metabolic heterogeneity and plasticity within GBM tumors. We therefore aimed to investigate metabolic phenotyping of primary cultures in the context of molecular tumor heterogeneity to provide a proof of concept for personalized metabolic targeting of GBM.Experimental Design: We have analyzed extensively several primary GBM cultures using transcriptomics, metabolic phenotyping assays, and mitochondrial respirometry.Results: We found that metabolic phenotyping clearly identifies 2 clusters, GLNHigh and GLNLow, mainly based on metabolic plasticity and glutamine (GLN) utilization. Inhibition of glutamine metabolism slows the in vitro and in vivo growth of GLNHigh GBM cultures despite metabolic adaptation to nutrient availability, in particular by increasing pyruvate shuttling into mitochondria. Furthermore, phenotypic and molecular analyses show that highly proliferative GLNHigh cultures are CD133neg and display a mesenchymal signature in contrast to CD133pos GLNLow GBM cells.Conclusions: Our results show that metabolic phenotyping identified an essential metabolic pathway in a GBM cell subtype, and provide a proof of concept for theranostic metabolic targeting. Clin Cancer Res; 23(20); 6292-304. ©2017 AACR.
Collapse
Affiliation(s)
| | - Cynthia Chauvin
- CRCINA, INSERM, Université de Nantes, France.,Labex IGO "Immunotherapy, Graft, Oncology."
| | - Lisa Oliver
- CRCINA, INSERM, Université de Nantes, France.,Centre Hospitalier-Universitaire (CHU) de Nantes, Nantes, France.,Equipe labellisée Ligue contre le Cancer.,Labex IGO "Immunotherapy, Graft, Oncology."
| | - Catherine Gratas
- CRCINA, INSERM, Université de Nantes, France.,Centre Hospitalier-Universitaire (CHU) de Nantes, Nantes, France.,Equipe labellisée Ligue contre le Cancer
| | | | - Ulrich Jarry
- CRCINA, INSERM, Université de Nantes, France.,Labex IGO "Immunotherapy, Graft, Oncology."
| | - Emmanuel Scotet
- CRCINA, INSERM, Université de Nantes, France.,Labex IGO "Immunotherapy, Graft, Oncology."
| | - Marion Rabe
- CRCINA, INSERM, Université de Nantes, France
| | - Marie-Clotilde Alves-Guerra
- Inserm, U1016, Institut Cochin, Paris, France.,CNRS, UMR 8104, Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Raluca Teusan
- Institut du thorax, INSERM, CNRS, UNIV Nantes, Nantes, France
| | - Fabien Gautier
- CRCINA, INSERM, Université de Nantes, France.,Institut de Cancérologie de l'Ouest, René Gauducheau, St Herblain, France
| | - Delphine Loussouarn
- CRCINA, INSERM, Université de Nantes, France.,Centre Hospitalier-Universitaire (CHU) de Nantes, Nantes, France
| | - Vincent Compan
- Institute of Functional Genomics, Labex ICST, CNRS, UMR 5203, University of Montpellier, Montpellier, France.,INSERM U1191, Montpellier, France
| | | | - François M Vallette
- CRCINA, INSERM, Université de Nantes, France. .,Institut de Cancérologie de l'Ouest, René Gauducheau, St Herblain, France.,Equipe labellisée Ligue contre le Cancer.,Labex IGO "Immunotherapy, Graft, Oncology."
| | - Claire Pecqueur
- CRCINA, INSERM, Université de Nantes, France. .,Equipe labellisée Ligue contre le Cancer.,Labex IGO "Immunotherapy, Graft, Oncology."
| |
Collapse
|
15
|
Lafargue A, Degorre C, Corre I, Alves-Guerra MC, Gaugler MH, Vallette F, Pecqueur C, Paris F. Ionizing radiation induces long-term senescence in endothelial cells through mitochondrial respiratory complex II dysfunction and superoxide generation. Free Radic Biol Med 2017; 108:750-759. [PMID: 28431961 DOI: 10.1016/j.freeradbiomed.2017.04.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 04/01/2017] [Accepted: 04/16/2017] [Indexed: 12/18/2022]
Abstract
Ionizing radiation causes oxidative stress, leading to acute and late cellular responses. We previously demonstrated that irradiation of non-proliferating endothelial cells, as observed in normal tissues, induces early apoptosis, which can be inhibited by pretreatment with Sphingosine-1-Phosphate. We now propose to better characterize the long-term radiation response of endothelial cells by studying the molecular pathways associated with senescence and its link with acute apoptosis. First, senescence was validated in irradiated quiescent microvascular HMVEC-L in a dose- and time-dependent manner by SA β-galactosidase staining, p16Ink4a and p21Waf1 expression, pro-inflammatory IL-8 secretion and DNA damage response activation. This premature aging was induced independently of Sphingosine 1-Phosphate treatment, supporting its non-connection with acute IR-induced apoptosis. Then, senescence under these conditions showed persistent activation of p53 pathway and mitochondrial dysfunctions, characterized by O2·- generation, inhibition of respiratory complex II activity and over-expression of SOD2 and GPX1 detoxification enzymes. Senescence was significantly inhibited by treatment with pifithrin-α, a p53 inhibitor, or by MnTBAP, a superoxide dismutase mimetic, validating those molecular actors in IR-induced endothelial cell aging. However, MnTBAP, but not pifithrin-α, was able to limit superoxide generation and to rescue the respiratory complex II activity. Furthermore, MnTBAP was not modulating p53 up-regulation, suggesting that IR-induced senescence in quiescent endothelial cells is provided by at least 2 different pathways dependent of the mitochondrial oxidative stress response and the p53 activation. Further characterization of the actors involved in the respiratory complex II dysfunction will open new pharmacological strategies to modulate late radiation toxicity.
Collapse
Affiliation(s)
| | | | - Isabelle Corre
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Marie-Clotilde Alves-Guerra
- Inserm UMR1016, Paris F-75014, France; CNRS UMR8104, Paris F-75014, France; Université Paris Descartes, Paris F-75014, France
| | | | - François Vallette
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France
| | | | - François Paris
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France.
| |
Collapse
|
16
|
Vavrova E, Lenoir V, Alves-Guerra MC, Denis RG, Castel J, Esnous C, Dyck JRB, Luquet S, Metzger D, Bouillaud F, Prip-Buus C. Muscle expression of a malonyl-CoA-insensitive carnitine palmitoyltransferase-1 protects mice against high-fat/high-sucrose diet-induced insulin resistance. Am J Physiol Endocrinol Metab 2016; 311:E649-60. [PMID: 27507552 DOI: 10.1152/ajpendo.00020.2016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 08/09/2016] [Indexed: 12/17/2022]
Abstract
Impaired skeletal muscle mitochondrial fatty acid oxidation (mFAO) has been implicated in the etiology of insulin resistance. Carnitine palmitoyltransferase-1 (CPT1) is a key regulatory enzyme of mFAO whose activity is inhibited by malonyl-CoA, a lipogenic intermediate. Whereas increasing CPT1 activity in vitro has been shown to exert a protective effect against lipid-induced insulin resistance in skeletal muscle cells, only a few studies have addressed this issue in vivo. We thus examined whether a direct modulation of muscle CPT1/malonyl-CoA partnership is detrimental or beneficial for insulin sensitivity in the context of diet-induced obesity. By using a Cre-LoxP recombination approach, we generated mice with skeletal muscle-specific and inducible expression of a mutated CPT1 form (CPT1mt) that is active but insensitive to malonyl-CoA inhibition. When fed control chow, homozygous CPT1mt transgenic (dbTg) mice exhibited decreased CPT1 sensitivity to malonyl-CoA inhibition in isolated muscle mitochondria, which was sufficient to substantially increase ex vivo muscle mFAO capacity and whole body fatty acid utilization in vivo. Moreover, dbTg mice were less prone to high-fat/high-sucrose (HFHS) diet-induced insulin resistance and muscle lipotoxicity despite similar body weight gain, adiposity, and muscle malonyl-CoA content. Interestingly, these CPT1mt-protective effects in dbTg-HFHS mice were associated with preserved muscle insulin signaling, increased muscle glycogen content, and upregulation of key genes involved in muscle glucose metabolism. These beneficial effects of muscle CPT1mt expression suggest that a direct modulation of the malonyl-CoA/CPT1 partnership in skeletal muscle could represent a potential strategy to prevent obesity-induced insulin resistance.
Collapse
Affiliation(s)
- Eliska Vavrova
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France; Université Paris Diderot, Paris, France
| | - Véronique Lenoir
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Marie-Clotilde Alves-Guerra
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Raphaël G Denis
- Université Paris Diderot, Sorbonne Paris Cité, Unité de Biologie Fonctionnelle et Adaptative, Centre National de la Recherche Scientifique UMR8251, Paris, France
| | - Julien Castel
- Université Paris Diderot, Sorbonne Paris Cité, Unité de Biologie Fonctionnelle et Adaptative, Centre National de la Recherche Scientifique UMR8251, Paris, France
| | - Catherine Esnous
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Jason R B Dyck
- Cardiovascular Research Centre, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Serge Luquet
- Université Paris Diderot, Sorbonne Paris Cité, Unité de Biologie Fonctionnelle et Adaptative, Centre National de la Recherche Scientifique UMR8251, Paris, France
| | - Daniel Metzger
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Institut National de la Santé et de la Recherche Médicale, U964, Centre National de la Recherche Scientifique, UMR7104, Université de Strasbourg, Illkirch, France
| | - Frédéric Bouillaud
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Carina Prip-Buus
- Institut National de la Santé et de la Recherche Médicale, U1016, Institut Cochin, Paris, France; Centre National de la Recherche Scientifique, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris Cité, Paris, France;
| |
Collapse
|
17
|
Esteves P, Pecqueur C, Alves-Guerra MC. UCP2 induces metabolic reprogramming to inhibit proliferation of cancer cells. Mol Cell Oncol 2014; 2:e975024. [PMID: 27308391 PMCID: PMC4905249 DOI: 10.4161/23723556.2014.975024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 09/16/2014] [Accepted: 09/17/2014] [Indexed: 11/19/2022]
Abstract
Invalidation of uncoupling protein 2 (Ucp2) increases glucose utilization and proliferation in normal cells. We recently reported that cancer cells that overexpress UCP2 become less tumorigenic while switching their metabolism from glycolysis to oxidative phosphorylation. UCP2 appears to be a key regulator of cellular metabolism with a relevant function against tumorigenesis.
Collapse
Affiliation(s)
- Pauline Esteves
- Inserm, U1016; Institut Cochin; Paris, 75014, France; CNRS; UMR 8104; Paris, France; Université Paris Descartes; Sorbonne Paris Cité; Paris, France; These authors contributed equally to this article
| | - Claire Pecqueur
- CRCNA - UMR 892 INSERM - 6299 CNRS; Nantes, France; Faculté de Médecine; Université de Nantes; Nantes, France; These authors contributed equally to this article
| | - Marie-Clotilde Alves-Guerra
- Inserm, U1016; Institut Cochin; Paris, 75014, France; CNRS; UMR 8104; Paris, France; Université Paris Descartes; Sorbonne Paris Cité; Paris, France
| |
Collapse
|
18
|
Weaver KL, Alves-Guerra MC, Jin K, Wang Z, Han X, Ranganathan P, Zhu X, DaSilva T, Liu W, Ratti F, Demarest RM, Tzimas C, Rice M, Vasquez-Del Carpio R, Dahmane N, Robbins DJ, Capobianco AJ. NACK is an integral component of the Notch transcriptional activation complex and is critical for development and tumorigenesis. Cancer Res 2014; 74:4741-51. [PMID: 25038227 DOI: 10.1158/0008-5472.can-14-1547] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The Notch signaling pathway governs many distinct cellular processes by regulating transcriptional programs. The transcriptional response initiated by Notch is highly cell context dependent, indicating that multiple factors influence Notch target gene selection and activity. However, the mechanism by which Notch drives target gene transcription is not well understood. Herein, we identify and characterize a novel Notch-interacting protein, Notch activation complex kinase (NACK), which acts as a Notch transcriptional coactivator. We show that NACK associates with the Notch transcriptional activation complex on DNA, mediates Notch transcriptional activity, and is required for Notch-mediated tumorigenesis. We demonstrate that Notch1 and NACK are coexpressed during mouse development and that homozygous loss of NACK is embryonic lethal. Finally, we show that NACK is also a Notch target gene, establishing a feed-forward loop. Thus, our data indicate that NACK is a key component of the Notch transcriptional complex and is an essential regulator of Notch-mediated tumorigenesis and development.
Collapse
Affiliation(s)
- Kelly L Weaver
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Marie-Clotilde Alves-Guerra
- Inserm U1016, Institut Cochin, Paris, France. CNRS, UMR 8104, Paris, France. Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Ke Jin
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Zhiqiang Wang
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Xiaoqing Han
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Prathibha Ranganathan
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Xiaoxia Zhu
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Thiago DaSilva
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Wei Liu
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida. Department of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chonqing, China
| | - Francesca Ratti
- Ecole Normale Supérieure de Lyon, CNRS UMR 5239, Equipe de Différenciation Neuromusculaire, Lyon, France
| | - Renee M Demarest
- Rowan University School of Osteopathic Medicine, Department of Molecular Biology, Stratford, NJ
| | - Cristos Tzimas
- Molecular Biology Division, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
| | - Meghan Rice
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | | | - Nadia Dahmane
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - David J Robbins
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida
| | - Anthony J Capobianco
- Molecular Oncology Program, Division of Surgical Oncology, Dewitt Daughtry Family Department of Surgery, and Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida.
| |
Collapse
|
19
|
Esteves P, Pecqueur C, Ransy C, Esnous C, Lenoir V, Bouillaud F, Bulteau AL, Lombès A, Prip-Buus C, Ricquier D, Alves-Guerra MC. Mitochondrial retrograde signaling mediated by UCP2 inhibits cancer cell proliferation and tumorigenesis. Cancer Res 2014; 74:3971-82. [PMID: 24853548 DOI: 10.1158/0008-5472.can-13-3383] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cancer cells tilt their energy production away from oxidative phosphorylation (OXPHOS) toward glycolysis during malignant progression, even when aerobic metabolism is available. Reversing this phenomenon, known as the Warburg effect, may offer a generalized anticancer strategy. In this study, we show that overexpression of the mitochondrial membrane transport protein UCP2 in cancer cells is sufficient to restore a balance toward oxidative phosphorylation and to repress malignant phenotypes. Altered expression of glycolytic and oxidative enzymes mediated the effects of this metabolic shift. Notably, UCP2 overexpression increased signaling from the master energy-regulating kinase, adenosine monophosphate-activated protein kinase, while downregulating expression of hypoxia-induced factor. In support of recent new evidence about UCP2 function, we found that UCP2 did not function in this setting as a membrane potential uncoupling protein, but instead acted to control routing of mitochondria substrates. Taken together, our results define a strategy to reorient mitochondrial function in cancer cells toward OXPHOS that restricts their malignant phenotype.
Collapse
Affiliation(s)
- Pauline Esteves
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Claire Pecqueur
- CRCNA-UMR 892 INSERM-6299 CNRS; and Faculté de Médecine, Université de Nantes, Nantes, France
| | - Céline Ransy
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Catherine Esnous
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Véronique Lenoir
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Frédéric Bouillaud
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Anne-Laure Bulteau
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Anne Lombès
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Carina Prip-Buus
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Daniel Ricquier
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris
| | - Marie-Clotilde Alves-Guerra
- Authors' Affiliations: Inserm, U1016, Institut Cochin; CNRS, UMR 8104; Université Paris Descartes, Sorbonne Paris Cité, Paris;
| |
Collapse
|
20
|
Alves-Guerra MC, Ronchini C, Capobianco AJ. Mastermind-like 1 Is a specific coactivator of beta-catenin transcription activation and is essential for colon carcinoma cell survival. Cancer Res 2007; 67:8690-8. [PMID: 17875709 DOI: 10.1158/0008-5472.can-07-1720] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Misregulation of the Wnt signaling pathway has been linked to many human cancers including colon carcinoma and melanoma. The primary mediator of the oncogenic effects of the Wnt signaling pathway is beta-catenin. Accumulation of nuclear beta-catenin and transcription activation of lymphoid enhancer factor 1 (LEF1)/T-cell factor (TCF) target genes underlie the oncogenic activity. However, the mechanism of beta-catenin-mediated transcriptional activation remains poorly understood. In this study, we identified Mastermind-like 1 (Maml1), which is thought to be a specific coactivator for the Notch pathway, as a coactivator for beta-catenin. We found that Maml1 participates in the Wnt signaling by modulating the beta-catenin/TCF activity. We show in vivo that Maml1 is recruited by beta-catenin on the cyclin D1 and c-Myc promoters. Importantly, we show that Maml1 functions in the Wnt/beta-catenin pathway independently of Notch signaling. Finally, we show that the knockdown of Mastermind-like family proteins in colonic carcinoma cells results in cell death by affecting beta-catenin-induced expression of cyclin D1 and c-Myc. This is the first demonstration of a role for the Mastermind-like family in another signaling pathway and that the knockdown of Mastermind-like family function leads to tumor cell death.
Collapse
|
21
|
Yakubu DP, Mostyn A, Wilson V, Pearce S, Alves-Guerra MC, Pecqueur C, Miroux B, Budge H, Stephenson T, Symonds ME. Different effects of maternal parity, cold exposure and nutrient restriction in late pregnancy on the abundance of mitochondrial proteins in the kidney, liver and lung of postnatal sheep. Reproduction 2007; 133:1241-52. [PMID: 17636178 DOI: 10.1530/rep-06-0211] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Adaptation to the extrauterine environment at birth relies upon the onset of postnatal function and increased metabolism in the lungs, liver and kidney, mediated partly by activation of mitochondrial proteins such as the voltage-dependent anion channel (VDAC), cytochrome c and, in the lung only, uncoupling protein (UCP)2. The magnitude of adaptation is dependent on the maternal metabolic and endocrine environment. We, therefore, examined the influence of maternal cold exposure (MCE) induced by winter shearing of pregnant sheep in conjunction with nutrient restriction (NR; 50% reduction in maternal food intake from 110 days gestation up to term). The effect of parity was also examined, as the offspring of nulliparous mothers are growth restricted compared with multiparous offspring. All sheep were twin bearing. One twin was sampled after birth and its sibling at 30 days. In the lung, both MCE and maternal nulliparity enhanced UCP2 abundance. However, whilst VDAC abundance was decreased in both the offspring of nulliparous mothers and by NR, it was transiently raised by MCE. Kidney VDAC abundance was reduced by MCE and nulliparity, adaptations only influenced by NR in multiparous mothers. Cytochrome c abundance was raised by MCE and by NR in multiparous controls and raised in offspring of nulliparous mothers. Liver VDAC and cytochrome c abundance were transiently reduced by MCE and persistently lower in offspring of nulliparous mothers. In conclusion, changes in the maternal metabolic environment have marked tissue-specific effects on mitochondrial protein abundance in the lungs, liver and kidney that may be important in enabling the newborn to effectively adapt to the extrauterine environment.
Collapse
Affiliation(s)
- D P Yakubu
- Centre for Reproduction and Early Life, Institute of Clinical Research, University Hospital, Nottingham NG7 2UH, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Pearce S, Mostyn A, Alves-Guerra MC, Pecqueur C, Miroux B, Webb R, Stephenson T, Symond ME. Prolactin, prolactin receptor and uncoupling proteins during fetal and neonatal development. Proc Nutr Soc 2007; 62:421-7. [PMID: 14506890 DOI: 10.1079/pns2003246] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Uncoupling proteins (UCP) 1 and 2 are members of the subfamily of inner mitochondrial membrane carriers. UCP1 is specific to brown adipose tissue (BAT), where it is responsible for the rapid production of heat at birth. In fetal sheep UCP1 is first detectable at approximately 900d of gestation; its abundance increases with gestational age and peaks at the time of birth. The mRNA and protein for both the long and short form of the prolactin (PRL) receptor (PRLR) are also highly abundant in BAT. Enhanced PRLR abundance in late gestation is associated with an increase in the abundance of UCP1. This relationship between PRLR and UCP is not only present in BAT. Similar findings are now reported in the pregnant ovine uterus, where PRLR abundance reaches a maximum just before that of UCP2. However, the role of PRLR in BAT remains undetermined. Rat studies have shown that PRL administration throughout pregnancy results in offspring with increased UCP1 at birth. Studies in newborn lambs have shown that administration of PRL (20mg/d) causes an acute response, increasing colonic temperature in the first hour by 1°. This increased colonic temperature is maintained for the first 240h of life, in conjunction with enhanced lipolysis. After 70d of treatment there is no difference in the abundance of UCP1 but an increase in UCP1 activity; this effect may be mediated by an increase in lipolysis. Taken together these findings suggest that PRL could be an important endocrine factor during pregnancy and early postnatal life.
Collapse
Affiliation(s)
- S Pearce
- Academic Division of Child Health, School of Human Development, University Hospital, Nottingham NG7 2UH, UK.
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Gnanalingham MG, Mostyn A, Webb R, Keisler DH, Raver N, Alves-Guerra MC, Pecqueur C, Miroux B, Symonds ME, Stephenson T. Differential effects of leptin administration on the abundance of UCP2 and glucocorticoid action during neonatal development. Am J Physiol Endocrinol Metab 2005; 289:E1093-100. [PMID: 16091386 DOI: 10.1152/ajpendo.00228.2005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the neonate, adipose tissue and the lung both undergo a rapid transition after birth, which results in dramatic changes in uncoupling protein abundance and glucocorticoid action. Leptin potentially mediates some of these adaptations and is known to promote the loss of uncoupling protein (UCP)1, but its effects on other mitochondrial proteins or glucocorticoid action are not known. We therefore determined the effects of acute and chronic administration of ovine recombinant leptin on brown adipose tissue (BAT) and/or lung in neonatal sheep. For the acute study, eight pairs of 1-day-old lambs received, sequentially, 10, 100, and 100 mug of leptin or vehicle before tissue sampling 4 h from the start of the study, whereas in the chronic study, nine pairs of 1-day-old lambs received 100 mug of leptin or vehicle daily for 6 days before tissue sampling on day 7. Acute leptin decreased the abundance of UCP2, glucocorticoid receptor, and 11beta-hydroxysteroid dehydrogenase (11beta-HSD) type 1 mRNA and increased 11beta-HSD type 2 mRNA abundance in BAT, a pattern that was reversed with chronic leptin administration, which also diminished lung UCP2 protein abundance. In BAT, UCP2 mRNA abundance was positively correlated to plasma leptin and nonesterified fatty acids and negatively correlated to mean colonic temperature in the leptin group at 7 days. In conclusion, leptin administration to the neonatal lambs causes differential effects on UCP2 abundance in BAT and lung. These effects may be important in the development of these tissues, thereby optimizing lung function and fat growth.
Collapse
Affiliation(s)
- M G Gnanalingham
- Centre for Reproduction and Early Life, Institute of Clinical Research, University of Nottingham, Nottingham NG7 2UH, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Gnanalingham MG, Mostyn A, Wang J, Webb R, Keisler DH, Raver N, Alves-Guerra MC, Pecqueur C, Miroux B, Stephenson T, Symonds ME. Tissue-specific effects of leptin administration on the abundance of mitochondrial proteins during neonatal development. J Endocrinol 2005; 187:81-8. [PMID: 16214943 DOI: 10.1677/joe.1.06251] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Many tissues undergo a rapid transition after birth, accompanied by dramatic changes in mitochondrial protein function. In particular, uncoupling protein (UCP) abundance increases at birth in the lung and adipose tissue, to then gradually decline, an adaptation that is important in enabling normal tissue function. Leptin potentially mediates some of these changes and is known to promote the loss of UCP1 from brown fat but its effects on UCP2 and related mitochondrial proteins (i.e. voltage-dependent anion channel (VDAC) and cytochrome c) in other tissues are unknown. We therefore determined the effects of once-daily jugular venous administration of ovine recombinant leptin on mitochondrial protein abundance as determined by immunoblotting in tissues that do (i.e. the brain and pancreas) and do not (i.e. liver and skeletal muscle) express UCP2. Eight pairs of 1-day-old lambs received either 100 mug leptin or vehicle daily for 6 days, before tissue sampling on day 7. Administration of leptin diminished UCP2 abundance in the pancreas, but not the brain. Leptin administration had no affect on the abundance of VDAC or cytochrome c in any tissue examined. In leptin-administered animals, but not controls, UCP2 abundance in the pancreas was positively correlated with VDAC and cytochrome c content, and UCP2 abundance in the brain with colonic temperature. In conclusion, leptin administration to neonatal lambs causes a tissue-specific loss of UCP2 from the pancreas. These effects may be important in the regulation of neonatal tissue development and potentially for optimising metabolic control mechanisms in later life.
Collapse
Affiliation(s)
- M G Gnanalingham
- Centre for Reproduction and Early Life, Institute of Clinical Research, University of Nottingham, Nottingham NG7 2UH, UK
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Mostyn A, Litten JC, Perkins KS, Alves-Guerra MC, Pecqueur C, Miroux B, Symonds ME, Clarke L. Influence of genotype on the differential ontogeny of uncoupling protein 2 and 3 in subcutaneous adipose tissue and muscle in neonatal pigs. J Endocrinol 2004; 183:121-31. [PMID: 15525580 DOI: 10.1677/joe.1.05448] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The present study aimed to determine whether porcine genotype and/or postnatal age influenced mRNA abundance or protein expression of uncoupling protein (UCP)2 or 3 in subcutaneous adipose tissue (AT) and skeletal muscle (SM) and the extent to which these differences are associated with breed-specific discordance in endocrine and metabolic profiles. Piglets from commercial and Meishan litters were ranked according to birth weight. Tissue samples were obtained from the three median piglets from each litter on either day 0, 4, 7, 14 or 21 of neonatal life. UCP2 protein abundance in AT was similar between genotypes on the first day of life, but it was elevated at all subsequent postnatal ages (P<0.05) in AT of Meishan piglets. In contrast, UCP2 mRNA abundance was lower in Meishans up to 14 days of age. UCP2 mRNA expression was not correlated with protein abundance in either breed at any age. UCP3 mRNA in AT was similar between breeds up to day 7; thereafter, expression was higher (general linear model, P<0.05) in Meishan piglets. Conversely, UCP3 mRNA expression in SM was higher in commercial piglets after day 7. Colonic temperature remained lower in Meishan than commercial piglets throughout the study; this was most obvious in the immediate post-partum period when Meishan piglets had lower (P<0.05) plasma triiodothyronine. In conclusion, we have demonstrated that porcine genotype influences the expression and abundance of UCP2 and 3, an influence which may, in part, be due to the distinctive endocrine profiles associated with each genotype.
Collapse
Affiliation(s)
- A Mostyn
- Department of Agricultural Sciences, Imperial College London, Wye Campus, Ashford, Kent TN25 5AH, UK.
| | | | | | | | | | | | | | | |
Collapse
|
26
|
de Bilbao F, Arsenijevic D, Vallet P, Hjelle OP, Ottersen OP, Bouras C, Raffin Y, Abou K, Langhans W, Collins S, Plamondon J, Alves-Guerra MC, Haguenauer A, Garcia I, Richard D, Ricquier D, Giannakopoulos P. Resistance to cerebral ischemic injury in UCP2 knockout mice: evidence for a role of UCP2 as a regulator of mitochondrial glutathione levels. J Neurochem 2004; 89:1283-92. [PMID: 15147521 DOI: 10.1111/j.1471-4159.2004.02432.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Uncoupling protein 2 (UCP2) is suggested to be a regulator of reactive oxygen species production in mitochondria. We performed a detailed study of brain injury, including regional and cellular distribution of UCP2 mRNA, as well as measures of oxidative stress markers following permanent middle cerebral artery occlusion in UCP2 knockout (KO) and wild-type (WT) mice. Three days post ischemia, there was a massive induction of UCP2 mRNA confined to microglia in the peri-infarct area of WT mice. KO mice were less sensitive to ischemia as assessed by reduced brain infarct size, decreased densities of deoxyuridine triphosphate nick end-labelling (TUNEL)-labelled cells in the peri-infact area and lower levels of lipid peroxidation compared with WT mice. This resistance may be related to the substantial increase of basal manganese superoxide dismutase levels in neurons of KO mice. Importantly, we found a specific decrease of mitochondrial glutathione (GSH) levels in UCP2 expressing microglia of WT, but not in KO mice after ischemia. This specific association between UCP2 and mitochondrial GSH levels regulation was further confirmed using lipopolysaccharide models of peripheral inflammation, and in purified peritoneal macrophages. Moreover, our data imply that UCP2 is not directly involved in the regulation of ROS production but acts by regulating mitochondrial GSH levels in microglia.
Collapse
Affiliation(s)
- Fabienne de Bilbao
- Department of Psychiatry, University Hospitals Geneva, Geneva, Switzerland
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
Uncoupling proteins (UCPs) are mitochondrial transporters present in the inner membrane of mitochondria. They are found in all mammals and in plants. They belong to the family of anion mitochondrial carriers including adenine nucleotide transporters. The term "uncoupling protein" was originally used for UCP1, which is uniquely present in mitochondria of brown adipocytes, the thermogenic cells that maintain body temperature in small rodents. In these cells, UCP1 acts as a proton carrier activated by free fatty acids and creates a shunt between complexes of the respiratory chain and ATP synthase. Activation of UCP1 enhances respiration, and the uncoupling process results in a futile cycle and dissipation of oxidation energy as heat. UCP2 is ubiquitous and highly expressed in the lymphoid system, macrophages, and pancreatic islets. UCP3 is mainly expressed in skeletal muscles. In comparison to the established uncoupling and thermogenic activities of UCP1, UCP2 and UCP3 appear to be involved in the limitation of free radical levels in cells rather than in physiological uncoupling and thermogenesis. Moreover, UCP2 is a regulator of insulin secretion and UCP3 is involved in fatty acid metabolism.
Collapse
Affiliation(s)
- Sophie Rousset
- Centre National de la Recherche Scientifique, Unité Propre de Recherche 9078, Faculté de Médecine and Institut de Recherches Necker-Enfants Malades (IRNEM), Paris, France
| | | | | | | | | | | | | |
Collapse
|
28
|
Rousset S, Alves-Guerra MC, Ouadghiri-Bencherif S, Kozak LP, Miroux B, Richard D, Bouillaud F, Ricquier D, Cassard-Doulcier AM. Uncoupling protein 2, but not uncoupling protein 1, is expressed in the female mouse reproductive tract. J Biol Chem 2003; 278:45843-7. [PMID: 12941933 DOI: 10.1074/jbc.m306980200] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Uncoupling proteins (UCPs) are transporters of the inner mitochondrial membrane. Whereas UCP1 is uniquely present in brown adipose tissue where it uncouples respiration from ATP synthesis and activates respiration and heat production, UCP2 is present in numerous tissues, and its exact function remains to be clarified. Two sets of data provided the rationale for this study: (i) the intriguing report that UCP1 is present in uterus of mice (Nibbelink, M., Moulin, K., Arnaud, E., Duval, C., Penicaud, L., and Casteilla, L. (2001) J. Biol. Chem. 276, 47291-47295); and (ii) an observation that Ucp2(-/-) female mice (homozygous matings) have smaller litters compared with Ucp2(+/+) animals (S. Rousset and A.-M. Cassard-Doulcier, unpublished observations). These data prompted us to examine the expression of UCP1 and UCP2 in the reproductive tract of female mice. Using wild type, Ucp1(-/-) mice, and Ucp2(-/-) mice, we were unable to detect UCP1 in uterus of mice with appropriate antibodies, and we conclude that the signal assigned to UCP1 by others was neither UCP1 nor UCP2. Using a polyclonal antibody against UCP2 and tissues from Ucp2(-/-) mice as controls, UCP2 was detected in ovary, oviduct, and uterus. Expression of Ucp2 mRNA was also observed in ovary and uterus using in situ hybridization analysis. Bone marrow transplantation experiments revealed that the UCP2 signal of the ovary was restricted to ovarian cells. UCP2 level in ovary decreased during follicular growth and increased during the pre-ovulatory period, during which aspects of an inflammatory process are known to exist. Because UCP2 down-regulates reactive oxygen species, a role in the regulation of inflammatory events linked to the preparation of ovulation is suggested.
Collapse
Affiliation(s)
- Sophie Rousset
- CNRS, Unité Propre de Recherche 9078, Faculté de Médecine Necker-Enfants malades, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Alves-Guerra MC, Rousset S, Pecqueur C, Mallat Z, Blanc J, Tedgui A, Bouillaud F, Cassard-Doulcier AM, Ricquier D, Miroux B. Bone marrow transplantation reveals the in vivo expression of the mitochondrial uncoupling protein 2 in immune and nonimmune cells during inflammation. J Biol Chem 2003; 278:42307-12. [PMID: 12907675 DOI: 10.1074/jbc.m306951200] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The mitochondrial uncoupling protein 2 (UCP2) is expressed in spleen, lung, intestine, white adipose tissue, and immune cells. Bone marrow transplantation in mice was used to assess the contribution of immune cells to the expression of UCP2 in basal condition and during inflammation. Immune cells accounted for the total amount of UCP2 expression in the spleen, one-third of its expression in the lung, and did not participate in its expression in the intestine. LPS injection stimulated UCP2 expression in lung, spleen, and intestine in both immune and non-immune cells. Successive injections of LPS and dexamethasone or N-acetyl-cysteine prevented the induction of UCP2 in all three tissues, suggesting that oxygen free radical generation plays a role in UCP2 regulation. Finally, both previous studies and our data show that there is down-regulation of UCP2 in immune cells during their activation in the early stages of the LPS response followed by an up-regulation in UCP2 during the later stages to protect all cells against oxidative stress.
Collapse
Affiliation(s)
- Marie-Clotilde Alves-Guerra
- CNRS UPR 9078, Faculté de Médecine Necker-Enfants Malades, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Mostyn A, Wilson V, Dandrea J, Yakubu DP, Budge H, Alves-Guerra MC, Pecqueur C, Miroux B, Symonds ME, Stephenson T. Ontogeny and nutritional manipulation of mitochondrial protein abundance in adipose tissue and the lungs of postnatal sheep. Br J Nutr 2003; 90:323-8. [PMID: 12908892 DOI: 10.1079/bjn2003912] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The present study examined the ontogeny of mitochondrial protein abundance in adipose tissue and lungs over the first month of life in the sheep and the extent to which this may be altered by maternal undernutrition during the final month of gestation. The ontogeny of uncoupling protein (UCP), voltage-dependent anion channel (VDAC) and cytochrome c abundance were determined in adipose tissue and lungs sampled from near-term fetuses and young sheep aged 4 h, 1, 7 and 30 d. In adipose tissue, the abundance of UCP1, VDAC and cytochrome c all peaked at 1 d of age and then decreased by 30 d of age, at which stage the brown adipose tissue-specific UCP1 was no longer detectable but UCP2 was clearly abundant. For the lungs, however, UCP2 and VDAC abundance both peaked 7 d after birth and then decreased by 30 d of age. During postnatal development, therefore, a marked change in mitochondrial protein abundance occurs within both adipose tissue and lungs. Maternal nutrient restriction had no effect on lamb growth or tissue weights at 30 d of age but was associated with increased abundance of UCP2 and VDAC but not cytochrome c in both adipose tissue and lungs. These mitochondrial adaptations within both adipose tissue and the lungs of offspring born to previously nutrient-restricted mothers may compromise adipose tissue and lung function during periods of environmental stress.
Collapse
Affiliation(s)
- A Mostyn
- Academic Division of Child Health, School of Human Development, Queen's Medical Centre, University Hospital, Nottingham NG7 2UH, UK
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Winzell MS, Svensson H, Enerbäck S, Ravnskjaer K, Mandrup S, Esser V, Arner P, Alves-Guerra MC, Miroux B, Sundler F, Ahrén B, Holm C. Pancreatic beta-cell lipotoxicity induced by overexpression of hormone-sensitive lipase. Diabetes 2003; 52:2057-65. [PMID: 12882923 DOI: 10.2337/diabetes.52.8.2057] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Lipid perturbations associated with triglyceride overstorage in beta-cells impair insulin secretion, a process termed lipotoxicity. To assess the role of hormone-sensitive lipase, which is expressed and enzymatically active in beta-cells, in the development of lipotoxicity, we generated transgenic mice overexpressing hormone-sensitive lipase specifically in beta-cells. Transgenic mice developed glucose intolerance and severely blunted glucose-stimulated insulin secretion when challenged with a high-fat diet. As expected, both lipase activity and forskolin-stimulated lipolysis was increased in transgenic compared with wild-type islets. This was reflected in significantly lower triglycerides levels in transgenic compared with wild-type islets in mice receiving the high-fat diet, whereas no difference in islet triglycerides was found between the two genotypes under low-fat diet conditions. Our results highlight the importance of mobilization of the islet triglyceride pool in the development of beta-cell lipotoxicity. We propose that hormone-sensitive lipase is involved in mediating beta-cell lipotoxicity by providing ligands for peroxisome proliferator-activated receptors and other lipid-activated transcription factors, which in turn alter the expression of critical genes. One such gene might be uncoupling protein-2, which was found to be upregulated in transgenic islets, a change that was accompanied by decreased ATP levels.
Collapse
|
32
|
Abstract
BACKGROUND Uncoupling protein 2 (UCP2) regulates the production of reactive oxygen species in macrophages. However, its role in atherosclerosis is unknown. METHODS AND RESULTS Irradiated low-density lipoprotein receptor deficient mice (LDLR-/-) were transplanted with bone marrow from either UCP2 deficient mice (Ucp2-/-) or wild type mice (Ucp2+/+). Mice were fed an atherogenic diet for 7 weeks. Engraftment of bone marrow cells was confirmed by the presence of UCP2 protein expression in spleen cell mitochondria of Ucp2+/+ transplanted mice and its absence in Ucp2-/- transplanted mice. Leukocyte counts and plasma cholesterol levels were comparable in both groups. We found a marked increase in atherosclerotic lesion size in the thoracic aorta of Ucp2-/- transplanted mice compared with control Ucp2+/+ transplanted mice (8.3+/-0.9% versus 4.3+/-0.4%, respectively; P<0.005), as well as in the aortic sinus (150 066+/-12 388 microm2 versus 105 689+/-9 727 microm2, respectively; P<0.05). This was associated with increased nitrotyrosine staining, which suggests enhanced oxidative stress. Analysis of plaque composition revealed a significant increase in macrophage accumulation (P<0.05) and apoptosis (P<0.05), along with a decrease in collagen content (P<0.05), suggesting a potentially more vulnerable phenotype. CONCLUSION These results suggest a protective role for UCP2 against atherosclerosis.
Collapse
Affiliation(s)
- J Blanc
- Institut National de la Santé et de la Recherche Médicale, INSERM U541, and Université Paris VII, Hôpital Lariboisière, Paris, France
| | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Pecqueur C, Alves-Guerra MC, Gelly C, Levi-Meyrueis C, Couplan E, Collins S, Ricquier D, Bouillaud F, Miroux B. Uncoupling protein 2, in vivo distribution, induction upon oxidative stress, and evidence for translational regulation. J Biol Chem 2001; 276:8705-12. [PMID: 11098051 DOI: 10.1074/jbc.m006938200] [Citation(s) in RCA: 355] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Uncoupling protein 2 (UCP2) belongs to the mitochondrial anion carrier family and partially uncouples respiration from ATP synthesis when expressed in recombinant yeast mitochondria. We generated a highly sensitive polyclonal antibody against human UCP2. Its reactivity toward mitochondrial proteins was compared between wild type and ucp2(-/-) mice, leading to non-ambiguous identification of UCP2. We detected UCP2 in spleen, lung, stomach, and white adipose tissue. No UCP2 was detected in heart, skeletal muscle, liver, and brown adipose tissue. The level of UCP2 in spleen mitochondria is less than 1% of the level of UCP1 in brown adipose tissue mitochondria. Starvation and LPS treatments increase UCP2 level up to 12 times in lung and stomach, which supports the hypothesis that UCP2 responds to oxidative stress situations. Stimulation of the UCP2 expression occurs without any change in UCP2 mRNA levels. This is explained by translational regulation of the UCP2 mRNA. We have shown that an upstream open reading frame located in exon two of the ucp2 gene strongly inhibits the expression of the protein. This further level of regulation of the ucp2 gene provides a mechanism by which expression can be strongly and rapidly induced under stress conditions.
Collapse
Affiliation(s)
- C Pecqueur
- CEREMOD (UPR 9078 CNRS), 9 Rue Jules Hetzel, 92190 Meudon, France
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Arsenijevic D, Onuma H, Pecqueur C, Raimbault S, Manning BS, Miroux B, Couplan E, Alves-Guerra MC, Goubern M, Surwit R, Bouillaud F, Richard D, Collins S, Ricquier D. Disruption of the uncoupling protein-2 gene in mice reveals a role in immunity and reactive oxygen species production. Nat Genet 2000; 26:435-9. [PMID: 11101840 DOI: 10.1038/82565] [Citation(s) in RCA: 830] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The gene Ucp2 is a member of a family of genes found in animals and plants, encoding a protein homologous to the brown fat uncoupling protein Ucp1 (refs 1-3). As Ucp2 is widely expressed in mammalian tissues, uncouples respiration and resides within a region of genetic linkage to obesity, a role in energy dissipation has been proposed. We demonstrate here, however, that mice lacking Ucp2 following targeted gene disruption are not obese and have a normal response to cold exposure or high-fat diet. Expression of Ucp2 is robust in spleen, lung and isolated macrophages, suggesting a role for Ucp2 in immunity or inflammatory responsiveness. We investigated the response to infection with Toxoplasma gondii in Ucp2-/- mice, and found that they are completely resistant to infection, in contrast with the lethality observed in wild-type littermates. Parasitic cysts and inflammation sites in brain were significantly reduced in Ucp2-/- mice (63% decrease, P<0.04). Macrophages from Ucp2-/- mice generated more reactive oxygen species than wild-type mice (80% increase, P<0.001) in response to T. gondii, and had a fivefold greater toxoplasmacidal activity in vitro compared with wild-type mice (P<0.001 ), which was absent in the presence of a quencher of reactive oxygen species (ROS). Our results indicate a role for Ucp2 in the limitation of ROS and macrophage-mediated immunity.
Collapse
Affiliation(s)
- D Arsenijevic
- Centre de Recherche de Hôpital Laval et Centre de Recherche sur le Métabolisme Energétique, Université Laval, Québec, Canada
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
del Mar Gonzalez-Barroso M, Pecqueur C, Gelly C, Sanchis D, Alves-Guerra MC, Bouillaud F, Ricquier D, Cassard-Doulcier AM. Transcriptional activation of the human ucp1 gene in a rodent cell line. Synergism of retinoids, isoproterenol, and thiazolidinedione is mediated by a multipartite response element. J Biol Chem 2000; 275:31722-32. [PMID: 10921912 DOI: 10.1074/jbc.m001678200] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Uncoupling protein 1 (UCP1) is uniquely expressed in brown adipocytes and generates heat production by uncoupling respiration from ATP synthesis. The activatory effects of norepinephrine and retinoic acid (RA) on rodent ucp1 gene transcription have been well characterized. These effects are mediated by a 211-base pair (bp) enhancer which is also sufficient to restrict expression to brown adipose tissue. The molecular mechanisms controlling the transcription of the human ucp1 gene are unknown. In order to study the transcriptional regulation of the human gene, we set up chloramphenicol acetyltransferase constructs containing the entire or deleted 5' regions upstream of the transcriptional start site of the gene. These constructs were transiently transfected in a mouse cell line. A 350-bp hormone response region showing a significant homology with the rat ucp1 enhancer and located between the BclI polymorphic site and an AatII site (bp -3820/-3470) was detected. This region was sufficient to mediate the stimulation by RA and by combined treatments (RA + isoproterenol (ISO), RA + thiazolidinedione (TZD), or RA + ISO + TZD). The highest stimulation, a 26-fold increase in basal activity, was obtained by RA + ISO + TZD treatment. In contrast to the rodent gene, under our conditions, the effect of ISO and/or TZD is dependent on RA stimulation. Analysis of 105 bp inside the 350-bp element by site-directed mutagenesis and gel retardation experiments demonstrated that a multipartite response element mediates the drug stimulation. This region binds RARs and RXRs nuclear factors, CREB/ATF factors, and also PPARgamma despite the absence of a consensus peroxisome-proliferator response element. The activation of the human ucp1 gene transcription by certain hormones or drugs, and the identification of the cis-elements involved, will help to identify new compounds activating fat oxidation and energy expenditure in humans.
Collapse
|