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Deschemin JC, Ransy C, Bouillaud F, Chung S, Galy B, Peyssonnaux C, Vaulont S. Hepcidin deficiency in mice impairs white adipose tissue browning possibly due to a defect in de novo adipogenesis. Sci Rep 2023; 13:12794. [PMID: 37550331 PMCID: PMC10406828 DOI: 10.1038/s41598-023-39305-0] [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: 02/16/2023] [Accepted: 07/23/2023] [Indexed: 08/09/2023] Open
Abstract
The role of iron in the two major sites of adaptive thermogenesis, namely the beige inguinal (iWAT) and brown adipose tissues (BAT) has not been fully understood yet. Body iron levels and distribution is controlled by the iron regulatory peptide hepcidin. Here, we explored iron homeostasis and thermogenic activity in brown and beige fat in wild-type and iron loaded Hepcidin KO mice. Hepcidin-deficient mice displayed iron overload in both iWAT and BAT, and preferential accumulation of ferritin in stromal cells compared to mature adipocytes. In contrast to BAT, the iWAT of Hepcidin KO animals featured with defective thermogenesis evidenced by an altered beige signature, including reduced UCP1 levels and decreased mitochondrial respiration. This thermogenic modification appeared cell autonomous and persisted after a 48 h-cold challenge, a potent trigger of thermogenesis, suggesting compromised de novo adipogenesis. Given that WAT browning occurs in both mice and humans, our results provide physiological results to interrogate the thermogenic capacity of patients with iron overload disorders.
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Affiliation(s)
- Jean-Christophe Deschemin
- Institut Cochin, INSERM, CNRS, Université Paris Cité, 75014, Paris, France
- Laboratory of Excellence GR-Ex, Paris, France
| | - Céline Ransy
- Institut Cochin, INSERM, CNRS, Université Paris Cité, 75014, Paris, France
| | - Frédéric Bouillaud
- Institut Cochin, INSERM, CNRS, Université Paris Cité, 75014, Paris, France
| | - Soonkyu Chung
- Department of Nutrition, University of Massachusetts-Amherst, Amherst, MA, 01003, USA
| | - Bruno Galy
- German Cancer Research Center, "Division of Virus-Associated Carcinogenesis", Im Neuenheimer Feld 280, 69120, Heidelberg, Germany
| | - Carole Peyssonnaux
- Institut Cochin, INSERM, CNRS, Université Paris Cité, 75014, Paris, France
- Laboratory of Excellence GR-Ex, Paris, France
| | - Sophie Vaulont
- Institut Cochin, INSERM, CNRS, Université Paris Cité, 75014, Paris, France.
- Laboratory of Excellence GR-Ex, Paris, France.
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2
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Star BS, van der Slikke EC, Ransy C, Schmitt A, Henning RH, Bouillaud F, Bouma HR. GYY4137-Derived Hydrogen Sulfide Donates Electrons to the Mitochondrial Electron Transport Chain via Sulfide: Quinone Oxidoreductase in Endothelial Cells. Antioxidants (Basel) 2023; 12:antiox12030587. [PMID: 36978834 PMCID: PMC10044827 DOI: 10.3390/antiox12030587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/02/2023] Open
Abstract
The protective effects of hydrogen sulphide (H2S) to limit oxidative injury and preserve mitochondrial function during sepsis, ischemia/reperfusion, and neurodegenerative diseases have prompted the development of soluble H2S-releasing compounds such as GYY4137. Yet, the effects of GYY4137 on the mitochondrial function of endothelial cells remain unclear, while this cell type comprises the first target cell after parenteral administration. Here, we specifically assessed whether human endothelial cells possess a functional sulfide:quinone oxidoreductase (SQOR), to oxidise GYY4137-released H2S within the mitochondria for electron donation to the electron transport chain. We demonstrate that H2S administration increases oxygen consumption by human umbilical vein endothelial cells (HUVECs), which does not occur in the SQOR-deficient cell line SH-SY5Y. GYY4137 releases H2S in HUVECs in a dose- and time-dependent fashion as quantified by oxygen consumption and confirmed by lead acetate assay, as well as AzMC fluorescence. Scavenging of intracellular H2S using zinc confirmed intracellular and intramitochondrial sulfur, which resulted in mitotoxic zinc sulfide (ZnS) precipitates. Together, GYY4137 increases intramitochondrial H2S and boosts oxygen consumption of endothelial cells, which is likely governed via the oxidation of H2S by SQOR. This mechanism in endothelial cells may be instrumental in regulating H2S levels in blood and organs but can also be exploited to quantify H2S release by soluble donors such as GYY4137 in living systems.
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Affiliation(s)
- Bastiaan S. Star
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
- Correspondence: (B.S.S.); (H.R.B.)
| | - Elisabeth C. van der Slikke
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
| | - Céline Ransy
- The National Center for Scientific Research (CNRS), The National Institute of Health and Medical Research (Inserm), Université de Paris, F-75014 Paris, France
| | - Alain Schmitt
- The National Center for Scientific Research (CNRS), The National Institute of Health and Medical Research (Inserm), Université de Paris, F-75014 Paris, France
| | - Robert H. Henning
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
| | - Frédéric Bouillaud
- The National Center for Scientific Research (CNRS), The National Institute of Health and Medical Research (Inserm), Université de Paris, F-75014 Paris, France
| | - Hjalmar R. Bouma
- Department of Clinical Pharmacy and Pharmacology, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
- Department of Internal Medicine, University Medical Center Groningen, University of Groningen, 9700 RB Groningen, The Netherlands
- Correspondence: (B.S.S.); (H.R.B.)
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3
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Real F, Zhu A, Huang B, Belmellat A, Sennepin A, Vogl T, Ransy C, Revol M, Arrigucci R, Lombès A, Roth J, Gennaro ML, Bouillaud F, Cristofari S, Bomsel M. S100A8-mediated metabolic adaptation controls HIV-1 persistence in macrophages in vivo. Nat Commun 2022; 13:5956. [PMID: 36220814 PMCID: PMC9553955 DOI: 10.1038/s41467-022-33401-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 10/13/2021] [Accepted: 09/16/2022] [Indexed: 11/23/2022] Open
Abstract
HIV-1 eradication is hindered by viral persistence in cell reservoirs, established not only in circulatory CD4+T-cells but also in tissue-resident macrophages. The nature of macrophage reservoirs and mechanisms of persistence despite combined anti-retroviral therapy (cART) remain unclear. Using genital mucosa from cART-suppressed HIV-1-infected individuals, we evaluated the implication of macrophage immunometabolic pathways in HIV-1 persistence. We demonstrate that ex vivo, macrophage tissue reservoirs contain transcriptionally active HIV-1 and viral particles accumulated in virus-containing compartments, and harbor an inflammatory IL-1R+S100A8+MMP7+M4-phenotype prone to glycolysis. Reactivation of infectious virus production and release from these reservoirs in vitro are induced by the alarmin S100A8, an endogenous factor produced by M4-macrophages and implicated in “sterile” inflammation. This process metabolically depends on glycolysis. Altogether, inflammatory M4-macrophages form a major tissue reservoir of replication-competent HIV-1, which reactivate viral production upon autocrine/paracrine S100A8-mediated glycolytic stimulation. This HIV-1 persistence pathway needs to be targeted in future HIV eradication strategies. HIV-1 eradication is hindered by viral persistence in different cell reservoirs, including circulatory CD4+ T-cells and tissue-resident macrophages. Here, by analyzing male genital mucosa from cART-suppressed HIV1-infected individuals, Real et al. show that M4 macrophages represent the major macrophage HIV-1 reservoir in this tissue. These macrophages have an inflammatory IL1R+S100A8+MMP7+M4-phenotype, and contain transcriptionally active HIV-1, which reactivate infectious virus production from viral latency in response to autocrine/paracrine S100A8-mediated glycolysis.
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Affiliation(s)
- Fernando Real
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France.,CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Aiwei Zhu
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France.,CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Boxin Huang
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France.,CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Ania Belmellat
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France.,CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Alexis Sennepin
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France.,CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Thomas Vogl
- Institute of Immunology and Interdisciplinary Center for Clinical Research, University of Münster, Münster, Germany
| | - Céline Ransy
- CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Marc Revol
- Plastic, Reconstructive and Aesthetic Surgery Department, Saint Louis Hospital, Paris, France
| | - Riccardo Arrigucci
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Anne Lombès
- CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Johannes Roth
- Institute of Immunology and Interdisciplinary Center for Clinical Research, University of Münster, Münster, Germany
| | - Maria Laura Gennaro
- Public Health Research Institute, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ, USA
| | - Frédéric Bouillaud
- CNRS, UMR8104, 75014, Paris, France.,Inserm, U1016, Institut Cochin, 75014, Paris, France
| | - Sarra Cristofari
- Plastic, Reconstructive and Aesthetic Surgery Department, Saint Louis Hospital, Paris, France
| | - Morgane Bomsel
- Laboratory of Mucosal Entry of HIV and Mucosal Immunity, Institut Cochin, Université Paris Cité, 75014, Paris, France. .,CNRS, UMR8104, 75014, Paris, France. .,Inserm, U1016, Institut Cochin, 75014, Paris, France.
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4
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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.
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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,
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5
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Bouillaud F, Ransy C, Moreau M, Benhaim J, Lombès A, Haouzi P. Methylene blue induced O 2 consumption is not dependent on mitochondrial oxidative phosphorylation: Implications for salvage pathways during acute mitochondrial poisoning. Respir Physiol Neurobiol 2022; 304:103939. [PMID: 35777722 DOI: 10.1016/j.resp.2022.103939] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 06/16/2022] [Accepted: 06/26/2022] [Indexed: 10/17/2022]
Abstract
While administration of the cyclic redox agent methylene blue (MB) during intoxication by mitochondrial poisons (cyanide, hydrogen sulfide, rotenone) increases survival, the mechanisms behind these antidotal properties remain poorly understood. The objective of the studies presented in this paper was to characterize the interactions between the redox properties of MB, the intermediate metabolism and the mitochondrial respiration. We first show that intra-venous administration of micromolar levels of methylene blue in sedated and mechanically ventilated rats, increases not only resting oxygen consumption but also CO2 production (by ~ 50%), with no change in their ratio. This hypermetabolic state could be reproduced in a cellular model, where we found that the rate of electron transfer to MB was of the same order of magnitude as that of normal cellular metabolism. Notably, the large increase in cellular oxygen consumption caused by MB was relatively indifferent to the status of the mitochondrial respiratory chain: oxygen consumption persisted even when the respiratory chain was inhibited or absent (using inhibitors and cells deficient in mitochondrial oxidative phosphorylation); yet MB did not impede mitochondrial ATP production in control conditions. We present evidence that after being reduced into leuco-methylene blue (LMB) in presence of reducing molecules that are physiologically found in cells (such as NADH), the re-oxidation of LMB by oxygen can account for the increased oxygen consumption observed in vivo. In conditions of acute mitochondrial dysfunction, these MB redox cycling properties allow the rescue of the glycolysis activity and Krebs cycle through an alternate route of oxidation of NADH (or other potential reduced molecules), which accumulation would have otherwise exerted negative feedback on these metabolic pathways. Our most intriguing finding is that re-oxidization of MB by oxygen ultimately results in an in vivo matching between the increase in the rate of O2 consumed, by MB re-oxidation, and the rate of CO2, produced by the intermediate metabolism, imitating the fundamental coupling between the glycolysis/Krebs cycle and the mitochondrial respiration.
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Affiliation(s)
- F Bouillaud
- Institut Cochin, INSERM, CNRS, Université Paris Cité, Paris, F75014, France.
| | - C Ransy
- Institut Cochin, INSERM, CNRS, Université Paris Cité, Paris, F75014, France
| | - M Moreau
- Institut Cochin, INSERM, CNRS, Université Paris Cité, Paris, F75014, France
| | - J Benhaim
- Institut Cochin, INSERM, CNRS, Université Paris Cité, Paris, F75014, France
| | - A Lombès
- Institut Cochin, INSERM, CNRS, Université Paris Cité, Paris, F75014, France
| | - P Haouzi
- Pennsylvania State University College of Medicine, Hershey, PA, USA.
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6
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Ransy C, Vaz C, Lombès A, Bouillaud F. Use of H 2O 2 to Cause Oxidative Stress, the Catalase Issue. Int J Mol Sci 2020; 21:E9149. [PMID: 33266350 PMCID: PMC7731207 DOI: 10.3390/ijms21239149] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 11/27/2020] [Accepted: 11/28/2020] [Indexed: 01/08/2023] Open
Abstract
Addition of hydrogen peroxide (H2O2) is a method commonly used to trigger cellular oxidative stress. However, the doses used (often hundreds of micromolar) are disproportionally high with regard to physiological oxygen concentration (low micromolar). In this study using polarographic measurement of oxygen concentration in cellular suspensions we show that H2O2 addition results in O2 release as expected from catalase reaction. This reaction is fast enough to, within seconds, decrease drastically H2O2 concentration and to annihilate it within a few minutes. Firstly, this is likely to explain why recording of oxidative damage requires the high concentrations found in the literature. Secondly, it illustrates the potency of intracellular antioxidant (H2O2) defense. Thirdly, it complicates the interpretation of experiments as subsequent observations might result from high/transient H2O2 exposure and/or from the diverse possible consequences of the O2 release.
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Affiliation(s)
| | | | | | - Frédéric Bouillaud
- Institut Cochin, Université de Paris, INSERM, CNRS, F-75014 Paris, France; (C.R.); (C.V.); (A.L.)
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7
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Hamraz M, Abolhassani R, Andriamihaja M, Ransy C, Lenoir V, Schwartz L, Bouillaud F. Hypertonic external medium represses cellular respiration and promotes Warburg/Crabtree effect. FASEB J 2019; 34:222-236. [PMID: 31914644 DOI: 10.1096/fj.201900706rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 03/22/2019] [Revised: 10/04/2019] [Accepted: 10/15/2019] [Indexed: 01/03/2023]
Abstract
Hyperosmotic conditions are associated to several pathological states. In this article, we evaluate the consequence of hyperosmotic medium on cellular energy metabolism. We demonstrate that exposure of cells to hyperosmotic conditions immediately reduces the mitochondrial oxidative phosphorylation rate. This causes an increase in glycolysis, which represses further respiration. This is known as the Warburg or Crabtree effect. In addition to aerobic glycolysis, we observed two other cellular responses that would help to preserve cellular ATP level and viability: A reduction in the cellular ATP turnover rate and a partial mitochondrial uncoupling which is expected to enhance ATP production by Krebs cycle. The latter is likely to constitute another metabolic adaptation to compensate for deficient oxidative phosphorylation that, importantly, is not dependent on glucose.
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Affiliation(s)
- Minoo Hamraz
- Institut Cochin, INSERM, CNRS, Université de Paris, Paris, France
| | | | - Mireille Andriamihaja
- INRA/AgroParisTech UMR 914, Physiologie de la Nutrition et du Comportement Alimentaire, Paris, France
| | - Céline Ransy
- Institut Cochin, INSERM, CNRS, Université de Paris, Paris, France
| | - Véronique Lenoir
- Institut Cochin, INSERM, CNRS, Université de Paris, Paris, France
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8
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Abou-Hamdan A, Ransy C, Roger T, Guedouari-Bounihi H, Galardon E, Bouillaud F. Positive feedback during sulfide oxidation fine-tunes cellular affinity for oxygen. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2016; 1857:1464-1472. [DOI: 10.1016/j.bbabio.2016.04.282] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 03/29/2016] [Accepted: 04/28/2016] [Indexed: 10/21/2022]
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9
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Szabo C, Ransy C, Módis K, Andriamihaja M, Murghes B, Coletta C, Olah G, Yanagi K, Bouillaud F. Regulation of mitochondrial bioenergetic function by hydrogen sulfide. Part I. Biochemical and physiological mechanisms. Br J Pharmacol 2014; 171:2099-122. [PMID: 23991830 DOI: 10.1111/bph.12369] [Citation(s) in RCA: 304] [Impact Index Per Article: 30.4] [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: 07/06/2013] [Revised: 08/08/2013] [Accepted: 08/12/2013] [Indexed: 12/11/2022] Open
Abstract
Until recently, hydrogen sulfide (H2 S) was exclusively viewed a toxic gas and an environmental hazard, with its toxicity primarily attributed to the inhibition of mitochondrial Complex IV, resulting in a shutdown of mitochondrial electron transport and cellular ATP generation. Work over the last decade established multiple biological regulatory roles of H2 S, as an endogenous gaseous transmitter. H2 S is produced by cystathionine γ-lyase (CSE), cystathionine β-synthase (CBS) and 3-mercaptopyruvate sulfurtransferase (3-MST). In striking contrast to its inhibitory effect on Complex IV, recent studies showed that at lower concentrations, H2 S serves as a stimulator of electron transport in mammalian cells, by acting as a mitochondrial electron donor. Endogenous H2 S, produced by mitochondrially localized 3-MST, supports basal, physiological cellular bioenergetic functions; the activity of this metabolic support declines with physiological aging. In specialized conditions (calcium overload in vascular smooth muscle, colon cancer cells), CSE and CBS can also associate with the mitochondria; H2 S produced by these enzymes, serves as an endogenous stimulator of cellular bioenergetics. The current article overviews the biochemical mechanisms underlying the stimulatory and inhibitory effects of H2 S on mitochondrial function and cellular bioenergetics and discusses the implication of these processes for normal cellular physiology. The relevance of H2 S biology is also discussed in the context of colonic epithelial cell physiology: colonocytes are exposed to high levels of sulfide produced by enteric bacteria, and serve as a metabolic barrier to limit their entry into the mammalian host, while, at the same time, utilizing it as a metabolic 'fuel'.
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Affiliation(s)
- Csaba Szabo
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA
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10
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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.
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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;
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11
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Metheni M, Echebli N, Chaussepied M, Ransy C, Chéreau C, Jensen K, Glass E, Batteux F, Bouillaud F, Langsley G. The level of H₂O₂ type oxidative stress regulates virulence of Theileria-transformed leukocytes. Cell Microbiol 2013; 16:269-79. [PMID: 24112286 PMCID: PMC3906831 DOI: 10.1111/cmi.12218] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [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: 05/15/2013] [Revised: 08/30/2013] [Accepted: 09/20/2013] [Indexed: 02/07/2023]
Abstract
Theileria annulata infects predominantly macrophages, and to a lesser extent B cells, and causes a widespread disease of cattle called tropical theileriosis. Disease-causing infected macrophages are aggressively invasive, but this virulence trait can be attenuated by long-term culture. Attenuated macrophages are used as live vaccines against tropical theileriosis and via their characterization one gains insights into what host cell trait is altered concomitant with loss of virulence. We established that sporozoite infection of monocytes rapidly induces hif1-α transcription and that constitutive induction of HIF-1α in transformed leukocytes is parasite-dependent. In both infectedmacrophages and B cells induction of HIF-1α activates transcription of its target genes that drive host cells to perform Warburg-like glycolysis. We propose that Theileria-infected leukocytes maintain a HIF-1α-driven transcriptional programme typical of Warburg glycolysis in order to reduce as much as possible host cell H2O2 type oxidative stress. However, in attenuated macrophages H2O2 production increases and HIF-1α levels consequently remained high, even though adhesion and aggressive invasiveness diminished. This indicates that Theileria infection generates a host leukocytes hypoxic response that if not properly controlled leads to loss of virulence.
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Affiliation(s)
- Mehdi Metheni
- Laboratoire de Biologie Cellulaire Comparative des Apicomplexes, Faculté de Médicine, Université Paris Descartes - Sorbonne Paris Cité, Paris, France; Inserm U1016, Cnrs UMR8104, Cochin Institute, Paris, 75014, France
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Roger T, Raynaud F, Bouillaud F, Ransy C, Simonet S, Crespo C, Bourguignon MP, Villeneuve N, Vilaine JP, Artaud I, Galardon E. New Biologically Active Hydrogen Sulfide Donors. Chembiochem 2013; 14:2268-71. [DOI: 10.1002/cbic.201300552] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Indexed: 01/01/2023]
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