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Strickland E, Pan D, Godfrey C, Kim JS, Hopke A, Ji W, Degrange M, Villavicencio B, Mansour MK, Zerbe CS, Irimia D, Amir A, Weiner OD. Self-extinguishing relay waves enable homeostatic control of human neutrophil swarming. Dev Cell 2024:S1534-5807(24)00381-2. [PMID: 38971157 DOI: 10.1016/j.devcel.2024.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 03/16/2024] [Accepted: 06/07/2024] [Indexed: 07/08/2024]
Abstract
Neutrophils collectively migrate to sites of injury and infection. How these swarms are coordinated to ensure the proper level of recruitment is unknown. Using an ex vivo model of infection, we show that human neutrophil swarming is organized by multiple pulsatile chemoattractant waves. These waves propagate through active relay in which stimulated neutrophils trigger their neighbors to release additional swarming cues. Unlike canonical active relays, we find these waves to be self-terminating, limiting the spatial range of cell recruitment. We identify an NADPH-oxidase-based negative feedback loop that is needed for this self-terminating behavior. We observe near-constant levels of neutrophil recruitment over a wide range of starting conditions, revealing surprising robustness in the swarming process. This homeostatic control is achieved by larger and more numerous swarming waves at lower cell densities. We link defective wave termination to a broken recruitment homeostat in the context of human chronic granulomatous disease.
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Affiliation(s)
- Evelyn Strickland
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, USA
| | - Deng Pan
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Christian Godfrey
- Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Julia S Kim
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA
| | - Alex Hopke
- Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Shriners Burns Hospital, Boston, MA 02114, USA
| | - Wencheng Ji
- Department of Physics of Complex Systems, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Maureen Degrange
- Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | | | - Michael K Mansour
- Harvard Medical School, Boston, MA, USA; Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
| | - Christa S Zerbe
- Laboratory of Clinical Immunology and Microbiology (LCIM), National Institute of Allergy and Infectious Diseases (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Daniel Irimia
- Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA; Harvard Medical School, Boston, MA, USA; Shriners Burns Hospital, Boston, MA 02114, USA
| | - Ariel Amir
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA; Department of Physics of Complex Systems, The Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Orion D Weiner
- Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, USA; Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, USA.
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2
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Krauth V, Bruno F, Pace S, Jordan PM, Temml V, Preziosa Romano M, Khan H, Schuster D, Rossi A, Filosa R, Werz O. Highly potent and selective 5-lipoxygenase inhibition by new, simple heteroaryl-substituted catechols for treatment of inflammation. Biochem Pharmacol 2023; 208:115385. [PMID: 36535528 DOI: 10.1016/j.bcp.2022.115385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 12/11/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
5-Lipoxygenase (LO) catalyzes the first steps in the formation of pro-inflammatory leukotrienes (LT) that are pivotal lipid mediators contributing to allergic reactions and inflammatory disorders. Based on its key role in LT biosynthesis, 5-LO is an attractive drug target, demanding for effective and selective inhibitors with efficacy in vivo, which however, are still rare. Encouraged by the recent identification of the catechol 4-(3,4-dihydroxyphenyl)dibenzofuran 1 as 5-LO inhibitor, simple structural modifications were made to yield even more effective and selective catechol derivatives. Within this new series, the two most potent compounds 3,4-dihydroxy-3'-phenoxybiphenyl (6b) and 2-(3,4-dihydroxyphenyl)benzo[b]thiophene (6d) potently inhibited human 5-LO in cell-free (IC506b and 6d = 20 nM) and cell-based assays (IC506b = 70 nM, 6d = 60 nM). Inhibition of 5-LO was reversible, unaffected by exogenously added substrate arachidonic acid, and not primarily mediated via radical scavenging and antioxidant activities. Functional 5-LO mutants expressed in HEK293 cells were still prone to inhibition by 6b and 6d, and docking simulations revealed distinct binding of the catechol moiety to 5-LO at an allosteric site. Analysis of 5-LO nuclear membrane translocation and intracellular Ca2+ mobilization revealed that these 5-LO-activating events are hardly affected by the catechols. Importantly, the high inhibitory potency of 6b and 6d was confirmed in human blood and in a murine zymosan-induced peritonitis model in vivo. Our results enclose these novel catechol derivatives as highly potent, novel type inhibitors of 5-LO with high selectivity and with marked effectiveness under pathophysiological conditions.
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Affiliation(s)
- Verena Krauth
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Ferdinando Bruno
- Department of Science and Technology, University of Sannio, 82100 Benevento, Italy; Advanced Medical Pharma, (AMP-BIOTEC) Healthcare Research and Innovation Center, 82030 San Salvatore Telesino, (BN), Italy
| | - Simona Pace
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Paul M Jordan
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Veronika Temml
- Department of Pharmaceutical Chemistry, Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Maria Preziosa Romano
- Department of Science and Technology, University of Sannio, 82100 Benevento, Italy; Advanced Medical Pharma, (AMP-BIOTEC) Healthcare Research and Innovation Center, 82030 San Salvatore Telesino, (BN), Italy
| | - Haroon Khan
- Department of Pharmacy, Faculty of Chemical and Life Sciences, Abdul Wali Khan University, Mardan 23200, Pakistan
| | - Daniela Schuster
- Department of Pharmaceutical Chemistry, Paracelsus Medical University Salzburg, 5020 Salzburg, Austria
| | - Antonietta Rossi
- Department of Pharmacy, School of Medicine and Surgery, University of Naples Federico II, I-80131 Naples, Italy
| | - Rosanna Filosa
- Department of Science and Technology, University of Sannio, 82100 Benevento, Italy; Advanced Medical Pharma, (AMP-BIOTEC) Healthcare Research and Innovation Center, 82030 San Salvatore Telesino, (BN), Italy; Istituti Clinici Scientifici Maugeri IRCCS, Cardiac Rehabilitation Unit of Telese Terme Institute, Italy.
| | - Oliver Werz
- Department of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany.
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3
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Pacini ESA, Satori NA, Jackson EK, Godinho RO. Extracellular cAMP-Adenosine Pathway Signaling: A Potential Therapeutic Target in Chronic Inflammatory Airway Diseases. Front Immunol 2022; 13:866097. [PMID: 35479074 PMCID: PMC9038211 DOI: 10.3389/fimmu.2022.866097] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 03/21/2022] [Indexed: 12/25/2022] Open
Abstract
Adenosine is a purine nucleoside that, via activation of distinct G protein-coupled receptors, modulates inflammation and immune responses. Under pathological conditions and in response to inflammatory stimuli, extracellular ATP is released from damaged cells and is metabolized to extracellular adenosine. However, studies over the past 30 years provide strong evidence for another source of extracellular adenosine, namely the “cAMP-adenosine pathway.” The cAMP-adenosine pathway is a biochemical mechanism mediated by ATP-binding cassette transporters that facilitate cAMP efflux and by specific ectoenzymes that convert cAMP to AMP (ecto-PDEs) and AMP to adenosine (ecto-nucleotidases such as CD73). Importantly, the cAMP-adenosine pathway is operative in many cell types, including those of the airways. In airways, β2-adrenoceptor agonists, which are used as bronchodilators for treatment of asthma and chronic respiratory diseases, stimulate cAMP efflux and thus trigger the extracellular cAMP-adenosine pathway leading to increased concentrations of extracellular adenosine in airways. In the airways, extracellular adenosine exerts pro-inflammatory effects and induces bronchoconstriction in patients with asthma and chronic obstructive pulmonary diseases. These considerations lead to the hypothesis that the cAMP-adenosine pathway attenuates the efficacy of β2-adrenoceptor agonists. Indeed, our recent findings support this view. In this mini-review, we will highlight the potential role of the extracellular cAMP-adenosine pathway in chronic respiratory inflammatory disorders, and we will explore how extracellular cAMP could interfere with the regulatory effects of intracellular cAMP on airway smooth muscle and innate immune cell function. Finally, we will discuss therapeutic possibilities targeting the extracellular cAMP-adenosine pathway for treatment of these respiratory diseases.
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Affiliation(s)
- Enio Setsuo Arakaki Pacini
- Division of Cellular Pharmacology, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Naiara Ayako Satori
- Division of Cellular Pharmacology, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Edwin Kerry Jackson
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States
| | - Rosely Oliveira Godinho
- Division of Cellular Pharmacology, Department of Pharmacology, Universidade Federal de São Paulo, São Paulo, Brazil
- *Correspondence: Rosely Oliveira Godinho,
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4
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Hasan D, Shono A, van Kalken CK, van der Spek PJ, Krenning EP, Kotani T. A novel definition and treatment of hyperinflammation in COVID-19 based on purinergic signalling. Purinergic Signal 2021; 18:13-59. [PMID: 34757513 PMCID: PMC8578920 DOI: 10.1007/s11302-021-09814-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Accepted: 07/18/2021] [Indexed: 12/15/2022] Open
Abstract
Hyperinflammation plays an important role in severe and critical COVID-19. Using inconsistent criteria, many researchers define hyperinflammation as a form of very severe inflammation with cytokine storm. Therefore, COVID-19 patients are treated with anti-inflammatory drugs. These drugs appear to be less efficacious than expected and are sometimes accompanied by serious adverse effects. SARS-CoV-2 promotes cellular ATP release. Increased levels of extracellular ATP activate the purinergic receptors of the immune cells initiating the physiologic pro-inflammatory immune response. Persisting viral infection drives the ATP release even further leading to the activation of the P2X7 purinergic receptors (P2X7Rs) and a severe yet physiologic inflammation. Disease progression promotes prolonged vigorous activation of the P2X7R causing cell death and uncontrolled ATP release leading to cytokine storm and desensitisation of all other purinergic receptors of the immune cells. This results in immune paralysis with co-infections or secondary infections. We refer to this pathologic condition as hyperinflammation. The readily available and affordable P2X7R antagonist lidocaine can abrogate hyperinflammation and restore the normal immune function. The issue is that the half-maximal effective concentration for P2X7R inhibition of lidocaine is much higher than the maximal tolerable plasma concentration where adverse effects start to develop. To overcome this, we selectively inhibit the P2X7Rs of the immune cells of the lymphatic system inducing clonal expansion of Tregs in local lymph nodes. Subsequently, these Tregs migrate throughout the body exerting anti-inflammatory activities suppressing systemic and (distant) local hyperinflammation. We illustrate this with six critically ill COVID-19 patients treated with lidocaine.
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Affiliation(s)
| | - Atsuko Shono
- Department of Anaesthesiology and Critical Care Medicine, School of Medicine, Showa University, Tokyo, 142-8666, Japan
| | | | - Peter J van der Spek
- Department of Pathology & Clinical Bioinformatics, Erasmus MC, Erasmus Universiteit Rotterdam, 3015 CE, Rotterdam, The Netherlands
| | | | - Toru Kotani
- Department of Anaesthesiology and Critical Care Medicine, School of Medicine, Showa University, Tokyo, 142-8666, Japan
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5
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Archambault AS, Tinto F, Dumais É, Rakotoarivelo V, Kostrzewa M, Plante PL, Martin C, Simard M, Silvestri C, Pouliot R, Laviolette M, Boulet LP, Vitale RM, Ligresti A, Di Marzo V, Flamand N. Biosynthesis of the Novel Endogenous 15-Lipoxygenase Metabolites N-13-Hydroxy-octodecadienoyl-ethanolamine and 13-Hydroxy-octodecadienoyl-glycerol by Human Neutrophils and Eosinophils. Cells 2021; 10:2322. [PMID: 34571971 PMCID: PMC8470279 DOI: 10.3390/cells10092322] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/25/2021] [Accepted: 08/31/2021] [Indexed: 12/26/2022] Open
Abstract
The endocannabinoids 2-arachidonoyl-glycerol and N-arachidonoyl-ethanolamine are lipids regulating many physiological processes, notably inflammation. Endocannabinoid hydrolysis inhibitors are now being investigated as potential anti-inflammatory agents. In addition to 2-arachidonoyl-glycerol and N-arachidonoyl-ethanolamine, the endocannabinoidome also includes other monoacylglycerols and N-acyl-ethanolamines such as 1-linoleoyl-glycerol (1-LG) and N-linoleoyl-ethanolamine (LEA). By increasing monoacylglycerols and/or N-acyl-ethanolamine levels, endocannabinoid hydrolysis inhibitors will likely increase the levels of their metabolites. Herein, we investigated whether 1-LG and LEA were substrates for the 15-lipoxygenase pathway, given that both possess a 1Z,4Z-pentadiene motif, near their omega end. We thus assessed how human eosinophils and neutrophils biosynthesized the 15-lipoxygenase metabolites of 1-LG and LEA. Linoleic acid (LA), a well-documented substrate of 15-lipoxygenases, was used as positive control. N-13-hydroxy-octodecadienoyl-ethanolamine (13-HODE-EA) and 13-hydroxy-octodecadienoyl-glycerol (13-HODE-G), the 15-lipoxygenase metabolites of LEA and 1-LG, were synthesized using Novozym 435 and soybean lipoxygenase. Eosinophils, which express the 15-lipoxygenase-1, metabolized LA, 1-LG, and LEA into their 13-hydroxy derivatives. This was almost complete after five minutes. Substrate preference of eosinophils was LA > LEA > 1-LG in presence of 13-HODE-G hydrolysis inhibition with methyl-arachidonoyl-fluorophosphonate. Human neutrophils also metabolized LA, 1-LG, and LEA into their 13-hydroxy derivatives. This was maximal after 15-30 s. Substrate preference was LA ≫ 1-LG > LEA. Importantly, 13-HODE-G was found in humans and mouse tissue samples. In conclusion, our data show that human eosinophils and neutrophils metabolize 1-LG and LEA into the novel endogenous 15-lipoxygenase metabolites 13-HODE-G and 13-HODE-EA. The full biological importance of 13-HODE-G and 13-HODE-EA remains to be explored.
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Affiliation(s)
- Anne-Sophie Archambault
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Francesco Tinto
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Élizabeth Dumais
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Volatiana Rakotoarivelo
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Magdalena Kostrzewa
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale Delle Ricerche (CNR), 80078 Pozzuoli, Italy; (M.K.); (R.M.V.); (A.L.)
| | - Pier-Luc Plante
- Institut sur la Nutrition et les Aliments Fonctionnels, Centre NUTRISS, École de Nutrition, Faculté des Sciences de L’agriculture et de L’alimentation, Université Laval, Québec City, QC G1V 0A6, Canada;
| | - Cyril Martin
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Mélissa Simard
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
- Faculté de Pharmacie de l’Université Laval and Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX, Axe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Québec City, QC G1V 0A6, Canada;
| | - Cristoforo Silvestri
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Roxane Pouliot
- Faculté de Pharmacie de l’Université Laval and Centre de Recherche en Organogénèse Expérimentale de l’Université Laval/LOEX, Axe Médecine Régénératrice, Centre de Recherche du CHU de Québec-Université Laval, Québec City, QC G1V 0A6, Canada;
| | - Michel Laviolette
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
| | - Louis-Philippe Boulet
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
| | - Rosa Maria Vitale
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale Delle Ricerche (CNR), 80078 Pozzuoli, Italy; (M.K.); (R.M.V.); (A.L.)
| | - Alessia Ligresti
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale Delle Ricerche (CNR), 80078 Pozzuoli, Italy; (M.K.); (R.M.V.); (A.L.)
| | - Vincenzo Di Marzo
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
- Endocannabinoid Research Group, Institute of Biomolecular Chemistry, Consiglio Nazionale Delle Ricerche (CNR), 80078 Pozzuoli, Italy; (M.K.); (R.M.V.); (A.L.)
- Institut sur la Nutrition et les Aliments Fonctionnels, Centre NUTRISS, École de Nutrition, Faculté des Sciences de L’agriculture et de L’alimentation, Université Laval, Québec City, QC G1V 0A6, Canada;
- Joint International Unit between the Consiglio Nazionale delle Ricerche (CNR), 80078 Pozzuoli, Italy
- Canada on Chemical and Biomolecular Research on the Microbiome and Its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Université Laval, Québec City, QC G1V 0A6, Canada
| | - Nicolas Flamand
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Faculté de Médecine, Université Laval, Québec City, QC G1V 4G5, Canada; (A.-S.A.); (F.T.); (É.D.); (V.R.); (C.M.); (M.S.); (C.S.); (M.L.); (L.-P.B.); (V.D.)
- Canada Excellence Research Chair on the Microbiome-Endocannabinoidome Axis in Metabolic Health (CERC-MEND), Université Laval, Québec City, QC G1V 0A6, Canada
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6
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Archambault AS, Zaid Y, Rakotoarivelo V, Turcotte C, Doré É, Dubuc I, Martin C, Flamand O, Amar Y, Cheikh A, Fares H, El Hassani A, Tijani Y, Côté A, Laviolette M, Boilard É, Flamand L, Flamand N. High levels of eicosanoids and docosanoids in the lungs of intubated COVID-19 patients. FASEB J 2021; 35:e21666. [PMID: 34033145 PMCID: PMC8206770 DOI: 10.1096/fj.202100540r] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/29/2021] [Accepted: 04/30/2021] [Indexed: 12/13/2022]
Abstract
Severe acute respiratory syndrome coronavirus 2 is responsible for coronavirus disease 2019 (COVID-19). While COVID-19 is often benign, a subset of patients develops severe multilobar pneumonia that can progress to an acute respiratory distress syndrome. There is no cure for severe COVID-19 and few treatments significantly improved clinical outcome. Dexamethasone and possibly aspirin, which directly/indirectly target the biosynthesis/effects of numerous lipid mediators are among those options. Our objective was to define if severe COVID-19 patients were characterized by increased bioactive lipids modulating lung inflammation. A targeted lipidomic analysis of bronchoalveolar lavages (BALs) by tandem mass spectrometry was done on 25 healthy controls and 33 COVID-19 patients requiring mechanical ventilation. BALs from severe COVID-19 patients were characterized by increased fatty acids and inflammatory lipid mediators. There was a predominance of thromboxane and prostaglandins. Leukotrienes were also increased, notably LTB4 , LTE4 , and eoxin E4 . Monohydroxylated 15-lipoxygenase metabolites derived from linoleate, arachidonate, eicosapentaenoate, and docosahexaenoate were also increased. Finally yet importantly, specialized pro-resolving mediators, notably lipoxin A4 and the D-series resolvins, were also increased, underscoring that the lipid mediator storm occurring in severe COVID-19 involves pro- and anti-inflammatory lipids. Our data unmask the lipid mediator storm occurring in the lungs of patients afflicted with severe COVID-19. We discuss which clinically available drugs could be helpful at modulating the lipidome we observed in the hope of minimizing the deleterious effects of pro-inflammatory lipids and enhancing the effects of anti-inflammatory and/or pro-resolving lipid mediators.
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Affiliation(s)
- Anne-Sophie Archambault
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada.,Canada Excellence Research Chair in the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Québec, QC, Canada
| | - Younes Zaid
- Biology Department, Faculty of Sciences, Mohammed V University, Rabat, Morocco.,Cheikh Zaïd Hospital, Abulcasis University of Health Sciences, Rabat, Morocco
| | - Volatiana Rakotoarivelo
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada.,Canada Excellence Research Chair in the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Québec, QC, Canada
| | - Caroline Turcotte
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada.,Canada Excellence Research Chair in the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Québec, QC, Canada
| | - Étienne Doré
- Centre de Recherche du Centre Hospitalier, Universitaire de Québec-Université Laval, Québec, QC, Canada.,Centre de Recherche Arthrite, Université Laval, Québec, QC, Canada
| | - Isabelle Dubuc
- Centre de Recherche du Centre Hospitalier, Universitaire de Québec-Université Laval, Québec, QC, Canada
| | - Cyril Martin
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada.,Canada Excellence Research Chair in the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Québec, QC, Canada
| | - Olivier Flamand
- Centre de Recherche du Centre Hospitalier, Universitaire de Québec-Université Laval, Québec, QC, Canada
| | - Youssef Amar
- Moroccan Foundation for Advanced Science, Innovation & Research (MAScIR), Rabat, Morocco
| | - Amine Cheikh
- Cheikh Zaïd Hospital, Abulcasis University of Health Sciences, Rabat, Morocco
| | - Hakima Fares
- Cheikh Zaïd Hospital, Abulcasis University of Health Sciences, Rabat, Morocco
| | - Amine El Hassani
- Cheikh Zaïd Hospital, Abulcasis University of Health Sciences, Rabat, Morocco
| | - Youssef Tijani
- Faculty of Medicine, Mohammed VI University of Health Sciences, Casablanca, Morocco
| | - Andréanne Côté
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada
| | - Michel Laviolette
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada
| | - Éric Boilard
- Centre de Recherche du Centre Hospitalier, Universitaire de Québec-Université Laval, Québec, QC, Canada.,Centre de Recherche Arthrite, Université Laval, Québec, QC, Canada.,Département de Microbiologie-Infectiologie et d'immunologie, Université Laval, Québec, QC, Canada
| | - Louis Flamand
- Centre de Recherche du Centre Hospitalier, Universitaire de Québec-Université Laval, Québec, QC, Canada.,Département de Microbiologie-Infectiologie et d'immunologie, Université Laval, Québec, QC, Canada
| | - Nicolas Flamand
- Centre de Recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Faculté de médecine, Département de médecine, Université Laval, Québec, QC, Canada.,Canada Excellence Research Chair in the Microbiome-Endocannabinoidome Axis in Metabolic Health, Université Laval, Québec, QC, Canada
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7
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Turcotte C, Archambault AS, Dumais É, Martin C, Blanchet MR, Bissonnette E, Ohashi N, Yamamoto K, Itoh T, Laviolette M, Veilleux A, Boulet LP, Di Marzo V, Flamand N. Endocannabinoid hydrolysis inhibition unmasks that unsaturated fatty acids induce a robust biosynthesis of 2-arachidonoyl-glycerol and its congeners in human myeloid leukocytes. FASEB J 2020; 34:4253-4265. [PMID: 32012340 DOI: 10.1096/fj.201902916r] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/07/2020] [Accepted: 01/07/2020] [Indexed: 12/12/2022]
Abstract
The endocannabinoid (eCB) 2-arachidonoyl-gycerol (2-AG) modulates immune responses by activating cannabinoid receptors or through its multiple metabolites, notably eicosanoids. Thus, 2-AG hydrolysis inhibition might represent an interesting anti-inflammatory strategy that would simultaneously increase the levels of 2-AG and decrease those of eicosanoids. Accordingly, 2-AG hydrolysis inhibition increased 2-AG half-life in neutrophils. Under such setting, neutrophils, eosinophils, and monocytes synthesized large amounts of 2-AG and other monoacylglycerols (MAGs) in response to arachidonic acid (AA) and other unsaturated fatty acids (UFAs). Arachidonic acid and UFAs were ~1000-fold more potent than G protein-coupled receptor (GPCR) agonists. Triascin C and thimerosal, which, respectively, inhibit fatty acyl-CoA synthases and acyl-CoA transferases, prevented the UFA-induced MAG biosynthesis, implying glycerolipid remodeling. 2-AG and other MAG biosynthesis was preceded by that of the corresponding lysophosphatidic acid (LPA). However, we could not directly implicate LPA dephosphorylation in MAG biosynthesis. While GPCR agonists poorly induced 2-AG biosynthesis, they inhibited that induced by AA by 25%-50%, suggesting that 2-AG biosynthesis is decreased when leukocytes are surrounded by a pro-inflammatory entourage. Our data strongly indicate that human leukocytes use AA and UFAs to biosynthesize biologically significant concentrations of 2-AG and other MAGs and that hijacking the immune system with 2-AG hydrolysis inhibitors might diminish inflammation in humans.
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Affiliation(s)
- Caroline Turcotte
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Anne-Sophie Archambault
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Élizabeth Dumais
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Cyril Martin
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Marie-Renée Blanchet
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Elyse Bissonnette
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Nami Ohashi
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, Machida, Japan
| | - Keiko Yamamoto
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, Machida, Japan
| | - Toshimasa Itoh
- Laboratory of Drug Design and Medicinal Chemistry, Showa Pharmaceutical University, Machida, Japan
| | - Michel Laviolette
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Alain Veilleux
- École de nutrition, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada
| | - Louis-Philippe Boulet
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Vincenzo Di Marzo
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada.,École de nutrition, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, QC, Canada.,Joint International Unit between the National Research Council (CNR) of Italy and Université Laval on Chemical and Biomolecular Research on the Microbiome and its Impact on Metabolic Health and Nutrition (UMI-MicroMeNu), Institute of Biomolecular Chemistry, CNR, Pozzuoli, Italy
| | - Nicolas Flamand
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
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8
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Alsalman ARS, Almashhedy LA, Alta'ee AH, Hadwan MH. Effect of Zinc Supplementation on Urate Pathway Enzymes in Spermatozoa and Seminal Plasma of Iraqi Asthenozoospermic Patients: A Randomized Controlled Trial. INTERNATIONAL JOURNAL OF FERTILITY & STERILITY 2019; 13:315-323. [PMID: 31710193 PMCID: PMC6875853 DOI: 10.22074/ijfs.2020.5760] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 04/27/2019] [Indexed: 01/30/2023]
Abstract
Background Uric acid (UA) is crucial for sperm metabolism as it protects seminal plasma against oxidative dam-
age. Zinc also plays a central role in sperm metabolism. The current study was designed to investigate the role of zinc
supplementation on qualitative and quantitative properties of seminal fluid, in parallel with the UA level and urate
pathway enzymes in the semen of patients with asthenozoospermia. Materials and Methods The study was designed as a randomized controlled trial of 60 asthenozoospermic subfertile
men. The current study, which was conducted during one year, involved 60 fertile and 60 asthenozoospermic subfertile
men belonging to Hilla City, Iraq. Semen samples were obtained from the participants before and after treatment with
zinc supplements. The levels of UA, xanthine oxidase (XO), adenosine deaminase (ADA) and 5'-nucleotidase (5'-NU)
activities were determined in spermatozoa and seminal plasma of both groups. Results UA levels (P=0.034) and 5'-NU activity (P=0.046) were significantly lower but ADA (P=0.05) and XO (P=0.015)
activities were significantly higher in infertile men than in healthy men. Treatment with zinc sulfate induced an increase in UA
(P=0.001) level and 5'-NU activity (P=0.001), but a decrease in ADA (P=0.016) and XO (P=0.05) activities. Conclusion Zinc supplementation restores UA levels and the activities of enzymes involved in the urate pathway
(XO and ADA) in the seminal plasma and spermatozoa of patients with asthenozoospermia, to reference values. Sup-
plementation of Zn compounds enhances the qualitative and quantitative properties of semen (Registration number:
NCT03361618).
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Affiliation(s)
| | - Lamia A Almashhedy
- Chemistry Department, College of Science, University of Babylon, Hilla, Iraq
| | - Abdulsamie H Alta'ee
- College of Medicine, University of Babylon, Hilla, Iraq.,College of Pharmacy, University of Babylon, Hilla, Iraq
| | - Mahmoud H Hadwan
- Chemistry Department, College of Science, University of Babylon, Hilla, Iraq. Electronic Address:
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9
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Tiwari P, Nagatake T, Hirata S, Sawane K, Saika A, Shibata Y, Morimoto S, Honda T, Adachi J, Abe Y, Isoyama J, Tomonaga T, Kiyono H, Kabashima K, Kunisawa J. Dietary coconut oil ameliorates skin contact hypersensitivity through mead acid production in mice. Allergy 2019; 74:1522-1532. [PMID: 30843234 DOI: 10.1111/all.13762] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 12/19/2018] [Accepted: 01/13/2019] [Indexed: 01/03/2023]
Abstract
Coconut oil is used as a dietary oil worldwide, and its healthy effects are recognized by the fact that coconut oil is easy to digest, helps in weight management, increases healthy cholesterol, and provides instant energy. Although topical application of coconut oil is known to reduce skin infection and inflammation, whether dietary coconut oil has any role in decreasing skin inflammation is unknown. In this study, we showed the impact of dietary coconut oil in allergic skin inflammation by using a mouse model of contact hypersensitivity (CHS). Mice maintained on coconut oil showed amelioration of skin inflammation and increased levels of cis-5, 8, 11-eicosatrienoic acid (mead acid) in serum. Intraperitoneal injection of mead acid inhibited CHS and reduced the number of neutrophils infiltrating to the skin. Detailed mechanistic studies unveiled that mead acid inhibited the directional migration of neutrophils by inhibiting the filamentous actin polymerization and leukotriene B4 production required for secondary recruitment of neutrophils. Our findings provide valuable insights into the preventive roles of coconut oil and mead acid against skin inflammation, thereby offering attractive therapeutic possibilities.
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Affiliation(s)
- Prabha Tiwari
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
| | - Takahiro Nagatake
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
| | - So‐ichiro Hirata
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
- Department of Microbiology and Immunology Kobe University Graduate School of Medicine Kobe‐city, Hyogo Japan
| | - Kento Sawane
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
- Graduate School of Pharmaceutical Sciences Osaka University Suita‐city, Osaka Japan
- Innovation Center Nippon Flour Mills Co., Ltd Atsugi-city, Kanagawa Japan
| | - Azusa Saika
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
- Graduate School of Pharmaceutical Sciences Osaka University Suita‐city, Osaka Japan
| | - Yuki Shibata
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
- Graduate School of Pharmaceutical Sciences Osaka University Suita‐city, Osaka Japan
| | - Sakiko Morimoto
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
| | - Tetsuya Honda
- Department of Dermatology Kyoto University Graduate School of Medicine Kyoto-city, Kyoto Japan
| | - Jun Adachi
- Laboratory of Proteome Research NIBIOHN Ibaraki‐city, Osaka Japan
| | - Yuichi Abe
- Laboratory of Proteome Research NIBIOHN Ibaraki‐city, Osaka Japan
| | - Junko Isoyama
- Laboratory of Proteome Research NIBIOHN Ibaraki‐city, Osaka Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research NIBIOHN Ibaraki‐city, Osaka Japan
| | - Hiroshi Kiyono
- International Research and Development Center for Mucosal Vaccines The Institute of Medical Science, The University of Tokyo Minato-ku, Tokyo Japan
- Department of Immunology, Graduate School of Medicine Chiba University Chiba‐city, Chiba Japan
- Division of Gastroenterology, Department of Medicine University of California, San Diego (UCSD) San Diego California
- CU‐UCSD Center for Mucosal Immunology, Allergy and Vaccines (cMAV) UCSD San Diego California
| | - Kenji Kabashima
- Department of Dermatology Kyoto University Graduate School of Medicine Kyoto-city, Kyoto Japan
| | - Jun Kunisawa
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN) Ibaraki‐city, Osaka Japan
- Department of Microbiology and Immunology Kobe University Graduate School of Medicine Kobe‐city, Hyogo Japan
- Graduate School of Pharmaceutical Sciences Osaka University Suita‐city, Osaka Japan
- International Research and Development Center for Mucosal Vaccines The Institute of Medical Science, The University of Tokyo Minato-ku, Tokyo Japan
- Graduate School of Medicine and Graduate School of Dentistry Osaka University Suita‐city, Osaka Japan
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10
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Alarcón S, Niechi I, Toledo F, Sobrevia L, Quezada C. Glioma progression in diabesity. Mol Aspects Med 2019; 66:62-70. [DOI: 10.1016/j.mam.2019.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 02/12/2019] [Accepted: 02/19/2019] [Indexed: 12/29/2022]
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11
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Archambault AS, Poirier S, Lefebvre JS, Robichaud PP, Larose MC, Turcotte C, Martin C, Provost V, Boudreau LH, McDonald PP, Laviolette M, Surette ME, Flamand N. 20-Hydroxy- and 20-carboxy-leukotriene (LT) B4
downregulate LTB4
-mediated responses of human neutrophils and eosinophils. J Leukoc Biol 2019; 105:1131-1142. [DOI: 10.1002/jlb.ma0718-306r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 11/30/2018] [Accepted: 12/15/2018] [Indexed: 12/24/2022] Open
Affiliation(s)
- Anne-Sophie Archambault
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Samuel Poirier
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
- Département de chimie et de biochimie; Université de Moncton; Moncton NB E1A 3E9 Canada
| | - Julie-S Lefebvre
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | | | - Marie-Chantal Larose
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Caroline Turcotte
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Cyril Martin
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Véronique Provost
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Luc H. Boudreau
- Département de chimie et de biochimie; Université de Moncton; Moncton NB E1A 3E9 Canada
| | - Patrick P. McDonald
- Centre de recherche du CHUS et Faculté de Médecine; Université de Sherbrooke; Sherbrooke QC J1H 5N4 Canada
| | - Michel Laviolette
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
| | - Marc E. Surette
- Département de chimie et de biochimie; Université de Moncton; Moncton NB E1A 3E9 Canada
| | - Nicolas Flamand
- Centre de recherche de l'Institut universitaire de cardiologie et pneumologie de Québec-Université Laval; Département de médecine; Faculté de médecine; Université Laval; Québec City QC G1V 4G5 Canada
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12
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Murphy RC, Folco G. Lysophospholipid acyltransferases and leukotriene biosynthesis: intersection of the Lands cycle and the arachidonate PI cycle. J Lipid Res 2019; 60:219-226. [PMID: 30606731 DOI: 10.1194/jlr.s091371] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/03/2019] [Indexed: 12/18/2022] Open
Abstract
Leukotrienes (LTs) are autacoids derived from the precursor arachidonic acid (AA) via the action of five-lipoxygenase (5-LO). When inflammatory cells are activated, 5-LO translocates to the nuclear membrane to initiate oxygenation of AA released by cytosolic phospholipase A2 (cPLA2) into leukotriene A4 (LTA4). LTA4 can also be exported from an activated donor cell into an acceptor cell by the process of transcellular biosynthesis. When thimerosal is added to cells, the level of free AA increases by inhibition of lysophospholipid acyltransferases of the Lands pathway of phospholipid remodeling. Another arachidonate phospholipid cycle involves phosphatidylinositol (PI) in the plasma membrane that undoubtedly intersects with the Lands pathway of phospholipid remodeling. The highest abundance of PI occurs between the ER and the plasma membrane and is probably a result of the importance of the PI signaling cascade in cellular biochemistry. Because transport proteins mediate the rapid intracellular movement of phospholipids, largely as result of physical membrane contact, 5-LO-dependent production of LTA4 could be mediated by the disappearance of free AA from the nuclear membrane, transfer to the ER for Lands cycle reesterification into PI, and population of PI(18:0/20:4) for cell membrane signaling.
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Affiliation(s)
- Robert C Murphy
- Department of Pharmacology, University of Colorado Denver, Aurora, CO 80045
| | - Giancarlo Folco
- Department of Pharmacology, University of Colorado Denver, Aurora, CO 80045
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13
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Archambault AS, Turcotte C, Martin C, Provost V, Larose MC, Laprise C, Chakir J, Bissonnette É, Laviolette M, Bossé Y, Flamand N. Comparison of eight 15-lipoxygenase (LO) inhibitors on the biosynthesis of 15-LO metabolites by human neutrophils and eosinophils. PLoS One 2018; 13:e0202424. [PMID: 30118527 PMCID: PMC6097673 DOI: 10.1371/journal.pone.0202424] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 08/02/2018] [Indexed: 12/22/2022] Open
Abstract
Neutrophils and eosinophils are important sources of bioactive lipids from the 5- and the 15-lipoxygenase (LO) pathways. Herein, we compared the effectiveness of humans eosinophils and eosinophil-depleted neutrophils to synthesize 15-LO metabolites using a cocktail of different 15-LO substrates as well as their sensitivities to eight documented 15-lipoxygenase inhibitors. The treatment of neutrophils and eosinophils with linoleic acid, dihomo-γ-linolenic acid, arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid and arachidonyl-ethanolamide, led to the synthesis of 13-HODE, 15-HETrE, 15-HETE, 15-HEPE, 14-HDHA/17-HDHA, and 15-hydroxy-AEA. Neutrophils and eosinophils also metabolized the endocannabinoid 2-arachidonoyl-glycerol into 15-HETE-glycerol, although this required 2-arachidonoyl-glycerol hydrolysis inhibition. Neutrophils and eosinophils differed in regard to dihomo-γ-linolenic acid and linoleic acid utilization with 15-HETrE/13-HODE ratios of 0.014 ± 0.0008 and 0.474 ± 0.114 for neutrophils and eosinophils respectively. 15-LO metabolite synthesis by neutrophils and eosinophils also differed in regard to their relative production of 17-HDHA and 14-HDHA.The synthesis of 15-LO metabolites by neutrophils was concentration-dependent and rapid, reaching a plateau after one minute. While investigating the biosynthetic routes involved, we found that eosinophil-depleted neutrophils express the 15-lipoxygenase-2 but not the 15-LO-1, in contrast to eosinophils which express the 15-LO-1 but not the 15-LO-2. Moreover, 15-LO metabolite synthesis by neutrophils was not inhibited by the 15-LO-1 inhibitors BLX769, BLX3887, and ML351. However, 15-LO product synthesis was partially inhibited by 100 μM NDGA. Altogether, our data indicate that the best 15-LO-1 inhibitors in eosinophils are BLX3887, BLX769, NDGA and ML351 and that the synthesis of 15-LO metabolites by neutrophils does not involve the 15-LO-1 nor the phosphorylation of 5-LO on Ser-663 but is rather the consequence of 15-LO-2 or another unidentified 15-LO.
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Affiliation(s)
- Anne-Sophie Archambault
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Caroline Turcotte
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Cyril Martin
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Véronique Provost
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Marie-Chantal Larose
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Catherine Laprise
- Centre intégré universitaire de santé et services sociaux du Saguenay–Lac-Saint-Jean, Département de sciences fondamentales, Université du Québec à Chicoutimi, Saguenay, QC, Canada
| | - Jamila Chakir
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Élyse Bissonnette
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Michel Laviolette
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Ynuk Bossé
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
| | - Nicolas Flamand
- Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Département de médecine, Faculté de médecine, Université Laval, Québec City, QC, Canada
- * E-mail:
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14
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Miralda I, Uriarte SM, McLeish KR. Multiple Phenotypic Changes Define Neutrophil Priming. Front Cell Infect Microbiol 2017; 7:217. [PMID: 28611952 PMCID: PMC5447094 DOI: 10.3389/fcimb.2017.00217] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 05/11/2017] [Indexed: 12/15/2022] Open
Abstract
Exposure to pro-inflammatory cytokines, chemokines, mitochondrial contents, and bacterial and viral products induces neutrophils to transition from a basal state into a primed one, which is currently defined as an enhanced response to activating stimuli. Although, typically associated with enhanced generation of reactive oxygen species (ROS) by the NADPH oxidase, primed neutrophils show enhanced responsiveness of exocytosis, NET formation, and chemotaxis. Phenotypic changes associated with priming also include activation of a subset of functions, including adhesion, transcription, metabolism, and rate of apoptosis. This review summarizes the breadth of phenotypic changes associated with priming and reviews current knowledge of the molecular mechanisms behind those changes. We conclude that the current definition of priming is too restrictive. Priming represents a combination of enhanced responsiveness and activated functions that regulate both adaptive and innate immune responses.
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Affiliation(s)
- Irina Miralda
- Department of Microbiology, University of Louisville School of MedicineLouisville, KY, United States
| | - Silvia M Uriarte
- Department of Microbiology, University of Louisville School of MedicineLouisville, KY, United States.,Department of Medicine, University of Louisville School of MedicineLouisville, KY, United States
| | - Kenneth R McLeish
- Department of Medicine, University of Louisville School of MedicineLouisville, KY, United States.,Robley Rex VA Medical CenterLouisville, KY, United States
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15
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Hasan D, Blankman P, Nieman GF. Purinergic signalling links mechanical breath profile and alveolar mechanics with the pro-inflammatory innate immune response causing ventilation-induced lung injury. Purinergic Signal 2017; 13:363-386. [PMID: 28547381 PMCID: PMC5563293 DOI: 10.1007/s11302-017-9564-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 04/26/2017] [Indexed: 02/06/2023] Open
Abstract
Severe pulmonary infection or vigorous cyclic deformation of the alveolar epithelial type I (AT I) cells by mechanical ventilation leads to massive extracellular ATP release. High levels of extracellular ATP saturate the ATP hydrolysis enzymes CD39 and CD73 resulting in persistent high ATP levels despite the conversion to adenosine. Above a certain level, extracellular ATP molecules act as danger-associated molecular patterns (DAMPs) and activate the pro-inflammatory response of the innate immunity through purinergic receptors on the surface of the immune cells. This results in lung tissue inflammation, capillary leakage, interstitial and alveolar oedema and lung injury reducing the production of surfactant by the damaged AT II cells and deactivating the surfactant function by the concomitant extravasated serum proteins through capillary leakage followed by a substantial increase in alveolar surface tension and alveolar collapse. The resulting inhomogeneous ventilation of the lungs is an important mechanism in the development of ventilation-induced lung injury. The high levels of extracellular ATP and the upregulation of ecto-enzymes and soluble enzymes that hydrolyse ATP to adenosine (CD39 and CD73) increase the extracellular adenosine levels that inhibit the innate and adaptive immune responses rendering the host susceptible to infection by invading microorganisms. Moreover, high levels of extracellular adenosine increase the expression, the production and the activation of pro-fibrotic proteins (such as TGF-β, α-SMA, etc.) followed by the establishment of lung fibrosis.
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Affiliation(s)
- Djo Hasan
- Department of Adult ICU, University Hospital Erasmus MC Rotterdam, 's-Gravendijkwal 230 3015 CE, Rotterdam, the Netherlands.
| | - Paul Blankman
- Department of Adult ICU, University Hospital Erasmus MC Rotterdam, 's-Gravendijkwal 230 3015 CE, Rotterdam, the Netherlands
| | - Gary F Nieman
- Department of Surgery, Upstate Medical University, 750 E Adams St, Syracuse, NY, 13210, USA
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16
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Turcotte C, Zarini S, Jean S, Martin C, Murphy RC, Marsolais D, Laviolette M, Blanchet MR, Flamand N. The Endocannabinoid Metabolite Prostaglandin E 2 (PGE 2)-Glycerol Inhibits Human Neutrophil Functions: Involvement of Its Hydrolysis into PGE 2 and EP Receptors. THE JOURNAL OF IMMUNOLOGY 2017; 198:3255-3263. [PMID: 28258202 DOI: 10.4049/jimmunol.1601767] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 02/01/2017] [Indexed: 01/05/2023]
Abstract
The endocannabinoids 2-arachidonoyl-glycerol and N-arachidonoyl-ethanolamine mediate an array of pro- and anti-inflammatory effects. These effects are related, in part, to their metabolism by eicosanoid biosynthetic enzymes. For example, N-arachidonoyl-ethanolamine and 2-arachidonoyl-glycerol can be metabolized by cyclooxygenase-2 into PG-ethanolamide (PG-EA) and PG-glycerol (PG-G), respectively. Although PGE2 is a recognized suppressor of neutrophil functions, the impact of cyclooxygenase-derived endocannabinoids such as PGE2-EA or PGE2-G on neutrophils is unknown. This study's aim was to define the effects of these mediators on neutrophil functions and the underlying cellular mechanisms involved. We show that PGE2-G, but not PGE2-EA, inhibits leukotriene B4 biosynthesis, superoxide production, migration, and antimicrobial peptide release. The effects of PGE2-G were prevented by EP1/EP2 receptor antagonist AH-6809 but not the EP4 antagonist ONO-AE2-227. The effects of PGE2-G required its hydrolysis into PGE2, were not observed with the non-hydrolyzable PGE2-serinol amide, and were completely prevented by methyl-arachidonoyl-fluorophosphate and palmostatin B, and partially prevented by JZL184 and WWL113. Although we could detect six of the documented PG-G hydrolases in neutrophils by quantitative PCR, only ABHD12 and ABHD16A were detected by immunoblot. Our pharmacological data, combined with our protein expression data, did not allow us to pinpoint one PGE2-G lipase, and rather support the involvement of an uncharacterized lipase and/or of multiple hydrolases. In conclusion, we show that PGE2-G inhibits human neutrophil functions through its hydrolysis into PGE2, and by activating the EP2 receptor. This also indicates that neutrophils could regulate inflammation by altering the balance between PG-G and PG levels in vivo.
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Affiliation(s)
- Caroline Turcotte
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Simona Zarini
- Department of Pharmacology, University of Colorado Denver, Aurora, CO 80045
| | - Stéphanie Jean
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Cyril Martin
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Robert C Murphy
- Department of Pharmacology, University of Colorado Denver, Aurora, CO 80045
| | - David Marsolais
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Michel Laviolette
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Marie-Renée Blanchet
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
| | - Nicolas Flamand
- Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Faculté de Médecine, Université Laval, Quebec City, Quebec G1V 4G5, Canada; and
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17
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Xu X, Zheng S, Xiong Y, Wang X, Qin W, Zhang H, Sun B. Adenosine effectively restores endotoxin-induced inhibition of human neutrophil chemotaxis via A1 receptor-p38 pathway. Inflamm Res 2017; 66:353-364. [PMID: 28074216 DOI: 10.1007/s00011-016-1021-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Revised: 12/17/2016] [Accepted: 12/20/2016] [Indexed: 12/20/2022] Open
Abstract
Neutrophil chemotaxis plays an essential role in recruiting neutrophils to sites of inflammation. Neutrophil chemotaxis is suppressed both after exposure to lipopolysaccharide (LPS) in vitro and during clinical and experimental endotoxemia, leading to serious consequences. Adenosine (ADO) is a potent anti-inflammatory agent that acts on a variety of neutrophil functions. However, its effects on human neutrophil chemotaxis during infection have been less well characterized. In the present study, we investigated the effect of ADO and its receptor-specific antagonist and agonist on neutrophil chemotaxis in an in vitro LPS-stimulated model. The results showed that increasing the concentration of ADO effectively restored the LPS-inhibited neutrophil chemotaxis to IL-8. A similar phenomenon occurred after intervention with a selective A1 receptor agonist but not with a selective antagonist. Pre-treatment with cAMP antagonist failed to restore LPS-inhibited chemotaxis. Furthermore, protein array and western blot analysis showed that the activation of A1 receptor significantly decreased LPS-induced p38 MAPK phosphorylation. However, the surface expression of the A1 receptor in LPS-stimulated neutrophils was not significantly changed. Taken together, these data indicated that ADO restored the LPS-inhibited chemotaxis via the A1 receptor, which downregulated the phosphorylation level of p38 MAPK, making this a promising new therapeutic strategy for infectious diseases.
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Affiliation(s)
- Xiaohan Xu
- Department of Burn and Plastic Surgery, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Shuyun Zheng
- Department of Critical Care Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yuyun Xiong
- Department of Clinical Laboratory, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Xu Wang
- Department of Burn and Plastic Surgery, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Weiting Qin
- Department of Burn and Plastic Surgery, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Huafeng Zhang
- Department of Burn and Plastic Surgery, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Bingwei Sun
- Department of Burn and Plastic Surgery, Affiliated Hospital, Jiangsu University, Zhenjiang, Jiangsu, China.
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18
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Chaves MM, Canetti C, Coutinho-Silva R. Crosstalk between purinergic receptors and lipid mediators in leishmaniasis. Parasit Vectors 2016; 9:489. [PMID: 27595742 PMCID: PMC5011846 DOI: 10.1186/s13071-016-1781-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 08/29/2016] [Indexed: 11/10/2022] Open
Abstract
Leishmaniasis is a neglected tropical disease affecting millions of people around the world caused by organisms of the genus Leishmania. Parasite escape mechanisms of the immune system confer the possibility of resistance and dissemination of the disease. A group of molecules that has become a target for Leishmania survival strategies are lipid mediators. Among them, leukotriene B4 (LTB4) has been described as a pro-inflammatory molecule capable of activating cells of the immune system to combat Leishmania. In an opposite way, prostaglandin E2 (PGE2) is a lipid mediator described as a deactivator of macrophages and neutrophils. The balance of these two molecules can be generated by extracellular nucleotides, such as adenosine 5'-triphosphate (ATP) and adenosine (Ado), which activate the purinergic receptors system. Herein, we discuss the role of extracellular nucleotides and the resulting balance of LTB4 and PGE2 in Leishmania fate, survival or death.
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Affiliation(s)
- Mariana M Chaves
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,Laboratory of Inflammation, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Translational Research in Health and Environment in the Amazon Region, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Cláudio Canetti
- Laboratory of Inflammation, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.,National Institute of Translational Research in Health and Environment in the Amazon Region, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Robson Coutinho-Silva
- Laboratory of Immunophysiology, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil. .,National Institute of Translational Research in Health and Environment in the Amazon Region, Biophysics Institute Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
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19
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Galvão AF, Petta T, Flamand N, Bollela VR, Silva CL, Jarduli LR, Malmegrim KCR, Simões BP, de Moraes LAB, Faccioli LH. Plasma eicosanoid profiles determined by high-performance liquid chromatography coupled with tandem mass spectrometry in stimulated peripheral blood from healthy individuals and sickle cell anemia patients in treatment. Anal Bioanal Chem 2016; 408:3613-23. [PMID: 26968567 DOI: 10.1007/s00216-016-9445-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 02/17/2016] [Accepted: 02/23/2016] [Indexed: 01/19/2023]
Abstract
Eicosanoids play an important role in homeostasis and in the pathogenesis of various human diseases. Pharmacological agents such as Ca(2+) ionophores and Ca(2+)-ATPase inhibitors, as well as natural agonists such as formylmethionine-leucyl-phenylalanine (fMLP), can stimulate eicosanoid biosynthesis. The aims of this work were to develop a method to determine the eicosanoid profile of human plasma samples after whole blood stimulation and to assess differences between healthy and sick individuals. For this purpose, a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was partially validated for the quantification of 22 eicosanoids using human plasma from healthy volunteers. In addition, we optimized a method for the stimulation of eicosanoids in human whole blood. LC-MS/MS analyses were performed by negative electrospray ionization and multiple reaction monitoring. An assumption of linearity resulted in a regression coefficient ≥0.98 for all eicosanoids tested. The mean intra-assay and inter-assay accuracy and precision values had relative standard deviations and relative errors of ≤15%, except for the lower limit of quantification, where these values were ≤20%. For whole blood stimulation, four stimuli (fMLP, ionomycin, A23187, and thapsigargin) were tested. Results of the statistical analysis showed that A23187 and thapsigargin were potent stimuli for the production or liberation of eicosanoids. We next compared the eicosanoid profiles of stimulated whole blood samples of healthy volunteers to those of patients with sickle cell anemia (SCA) under treatment with hydroxyurea (HU) or after chronic red blood cell (RBC) transfusion. The results indicate that the method was sufficient to find a difference between lipid mediators released in whole blood of SCA patients and those of healthy subjects, mainly for 5-HETE, 12-HETE, LTB4, LTE4, TXB2, and PGE2. In conclusion, our analytical method can detect significant changes in eicosanoid profiles in stimulated whole blood, which will contribute to establishing the eicosanoid profiles associated with different inflammatory and infectious diseases.
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Affiliation(s)
- Alyne Fávero Galvão
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - Tânia Petta
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - Nicolas Flamand
- Département de Médecine, Faculté de Médecine Université Laval, Centre de Recherche de l'Institut Universitaire de Cardiologie et de Pneumologie de Québec, 2725, chemin Sainte-Foy, Québec, G1V 4G5, Canada
| | - Valdes Roberto Bollela
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Célio Lopes Silva
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Luciana Ribeiro Jarduli
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, Ribeirão Preto, São Paulo, 14040-903, Brazil
| | - Kelen Cristina Ribeiro Malmegrim
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, Ribeirão Preto, São Paulo, 14040-903, Brazil.,Centro de Terapia Celular, Centro Regional de Hemoterapia do Hospital das Clínicas, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Rua Tenente Catão Roxo 2501, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Belinda Pinto Simões
- Departamento de Clínica Médica, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Luiz Alberto Beraldo de Moraes
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-901, Brazil
| | - Lúcia Helena Faccioli
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Av. do Café, s/n, Ribeirão Preto, São Paulo, 14040-903, Brazil.
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20
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Da’dara AA, Bhardwaj R, Ali YB, Skelly PJ. Schistosome tegumental ecto-apyrase (SmATPDase1) degrades exogenous pro-inflammatory and pro-thrombotic nucleotides. PeerJ 2014; 2:e316. [PMID: 24711968 PMCID: PMC3970803 DOI: 10.7717/peerj.316] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 03/04/2014] [Indexed: 12/20/2022] Open
Abstract
Schistosomes are parasitic worms that can survive in the hostile environment of the human bloodstream where they appear refractory to both immune elimination and thrombus formation. We hypothesize that parasite migration in the bloodstream can stress the vascular endothelium causing this tissue to release chemicals alerting responsive host cells to the stress. Such chemicals are called damage associated molecular patterns (DAMPs) and among the most potent is the proinflammatory mediator, adenosine triphosphate (ATP). Furthermore, the ATP derivative ADP is a pro-thrombotic molecule that acts as a strong activator of platelets. Schistosomes are reported to possess at their host interactive tegumental surface a series of enzymes that could, like their homologs in mammals, degrade extracellular ATP and ADP. These are alkaline phosphatase (SmAP), phosphodiesterase (SmNPP-5) and ATP diphosphohydrolase (SmATPDase1). In this work we employ RNAi to knock down expression of the genes encoding these enzymes in the intravascular life stages of the parasite. We then compare the abilities of these parasites to degrade exogenously added ATP and ADP. We find that only SmATPDase1-suppressed parasites are significantly impaired in their ability to degrade these nucleotides. Suppression of SmAP or SmNPP-5 does not appreciably affect the worms' ability to catabolize ATP or ADP. These findings are confirmed by the functional characterization of the enzymatically active, full-length recombinant SmATPDase1 expressed in CHO-S cells. The enzyme is a true apyrase; SmATPDase1 degrades ATP and ADP in a cation dependent manner. Optimal activity is seen at alkaline pH. The Km of SmATPDase1 for ATP is 0.4 ± 0.02 mM and for ADP, 0.252 ± 0.02 mM. The results confirm the role of tegumental SmATPDase1 in the degradation of the exogenous pro-inflammatory and pro-thrombotic nucleotides ATP and ADP by live intravascular stages of the parasite. By degrading host inflammatory signals like ATP, and pro-thrombotic signals like ADP, these parasite enzymes may minimize host immune responses, inhibit blood coagulation and promote schistosome survival.
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Affiliation(s)
- Akram A. Da’dara
- Molecular Helminthology Laboratory, Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA
| | - Rita Bhardwaj
- Molecular Helminthology Laboratory, Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA
| | - Yasser B.M. Ali
- Molecular Helminthology Laboratory, Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA
| | - Patrick J. Skelly
- Molecular Helminthology Laboratory, Department of Infectious Disease and Global Health, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA, USA
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21
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Dubois-Colas N, Petit-Jentreau L, Barreiro LB, Durand S, Soubigou G, Lecointe C, Klibi J, Rezaï K, Lokiec F, Coppée JY, Gicquel B, Tailleux L. Extracellular adenosine triphosphate affects the response of human macrophages infected with Mycobacterium tuberculosis. J Infect Dis 2014; 210:824-33. [PMID: 24604822 DOI: 10.1093/infdis/jiu135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Granulomas are the hallmark of Mycobacterium tuberculosis infection. As the host fails to control the bacteria, the center of the granuloma exhibits necrosis resulting from the dying of infected macrophages. The release of the intracellular pool of nucleotides into the surrounding medium may modulate the response of newly infected macrophages, although this has never been investigated. Here, we show that extracellular adenosine triphosphate (ATP) indirectly modulates the expression of 272 genes in human macrophages infected with M. tuberculosis and that it induces their alternative activation. ATP is rapidly hydrolyzed by the ecto-ATPase CD39 into adenosine monophosphate (AMP), and it is AMP that regulates the macrophage response through the adenosine A2A receptor. Our findings reveal a previously unrecognized role for the purinergic pathway in the host response to M. tuberculosis. Dampening inflammation through signaling via the adenosine A2A receptor may limit tissue damage but may also favor bacterial immune escape.
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Affiliation(s)
- Nicolas Dubois-Colas
- Unité de Génétique Mycobactérienne Cellule Pasteur, Université Paris Diderot, Sorbonne Paris Cité, Paris
| | - Laetitia Petit-Jentreau
- Unité de Génétique Mycobactérienne Cellule Pasteur, Université Paris Diderot, Sorbonne Paris Cité, Paris
| | - Luis B Barreiro
- Sainte-Justine Hospital Research Centre, Department of Pediatrics, Faculty of Medicine, University of Montreal, Canada
| | - Sylvère Durand
- Département de Radio-Pharmacologie, Institut Curie-Hôpital René Huguenin, Saint-Cloud, France
| | - Guillaume Soubigou
- Plate-forme Transcriptome et Epigénome, Département Génomes et Génétique, Institut Pasteur
| | | | | | - Keyvan Rezaï
- Département de Radio-Pharmacologie, Institut Curie-Hôpital René Huguenin, Saint-Cloud, France
| | - François Lokiec
- Département de Radio-Pharmacologie, Institut Curie-Hôpital René Huguenin, Saint-Cloud, France
| | - Jean-Yves Coppée
- Plate-forme Transcriptome et Epigénome, Département Génomes et Génétique, Institut Pasteur
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Morote-Garcia JC, Köhler D, Roth JM, Mirakaj V, Eldh T, Eltzschig HK, Rosenberger P. Repression of the equilibrative nucleoside transporters dampens inflammatory lung injury. Am J Respir Cell Mol Biol 2013; 49:296-305. [PMID: 23590299 DOI: 10.1165/rcmb.2012-0457oc] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Acute lung injury (ALI) is a devastating disorder of the lung that is characterized by hypoxemia, overwhelming pulmonary inflammation, and a high mortality in the critically ill. Adenosine has been implicated as an anti-inflammatory signaling molecule, and previous studies showed that extracellular adenosine concentrations are increased in inflamed tissues. Adenosine signaling is terminated by the uptake of adenosine from the extracellular into the intracellular compartment via equilibrative nucleoside transporters (ENTs). However, their role in controlling adenosine signaling during pulmonary inflammation remains unknown. After inflammatory in vitro experiments, we observed a repression of ENT1 and ENT2 that was associated with an attenuation of extracellular adenosine uptake. Experiments using short, interfering RNA silencing confirmed a significant contribution of ENT repression in elevating extracellular adenosine concentrations during inflammation. Furthermore, an examination of the ENT2 promoter implicated NF-κB as a key regulator for the observed ENT repression. Additional in vivo experiments using a murine model of inflammatory lung injury showed that the pharmacological inhibition of ENT1 and ENT2 resulted in improved pulmonary barrier function and reduced signs of acute inflammation of the lung. Whereas experiments on Ent1(-/-) or Ent2(-/-) mice revealed lung protection in LPS-induced lung injury, an examination of bone marrow chimeras for ENTs pointed to the nonhematopoetic expression of ENTs as the underlying cause of dampened pulmonary inflammation during ALI. Taken together, these findings reveal the transcriptional repression of ENTs as an innate protective response during acute pulmonary inflammation. The inhibition of ENTs could be pursued as a therapeutic option to ameliorate inflammatory lung injury.
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Affiliation(s)
- Julio C Morote-Garcia
- Department of Anesthesiology and Intensive Care Medicine, Eberhard Karls University and Tübingen University Hospital, Tübingen, Germany
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23
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The role of macrophages in obstructive airways disease: chronic obstructive pulmonary disease and asthma. Cytokine 2013; 64:613-25. [PMID: 24084332 DOI: 10.1016/j.cyto.2013.09.010] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 12/15/2022]
Abstract
Macrophages are a major cellular component of the innate immune system, and play an important role in the recognition of microbes, particulates, and immunogens and to the regulation of inflammatory responses. In the lung, macrophages react with soluble proteins that bind microbial products in order to remove pathogens and particles and to maintain the sterility of the airway tract. Chronic obstructive pulmonary disease and asthma are both obstructive airway diseases that involve chronic inflammation of the respiratory tract which contributes to disease progression. In the case of COPD, there is increasing evidence that lung macrophages orchestrate inflammation through the release of chemokines that attract neutrophils, monocytes and T cells and the release of several proteases. On the other hand, in asthma, it seems that alveolar macrophages are inappropriately activated and are implicated in the development and progression of the disease. In this review we summarize the current basic and clinical research studies which highlight the role of macrophages in asthma and COPD.
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24
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Chouinard F, Turcotte C, Guan X, Larose MC, Poirier S, Bouchard L, Provost V, Flamand L, Grandvaux N, Flamand N. 2-Arachidonoyl-glycerol- and arachidonic acid-stimulated neutrophils release antimicrobial effectors against E. coli, S. aureus, HSV-1, and RSV. J Leukoc Biol 2013; 93:267-76. [PMID: 23242611 PMCID: PMC4995105 DOI: 10.1189/jlb.0412200] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
The endocannabinoid 2-AG is highly susceptible to its hydrolysis into AA, which activates neutrophils through de novo LTB(4) biosynthesis, independently of CB activation. In this study, we show that 2-AG and AA stimulate neutrophils to release antimicrobial effectors. Supernatants of neutrophils activated with nanomolar concentrations of 2-AG and AA indeed inhibited the infectivity of HSV-1 and RSV. Additionally, the supernatants of 2-AG- and AA-stimulated neutrophils strongly impaired the growth of Escherichia coli and Staphylococcus aureus. This correlated with the release of a large amount (micrograms) of α-defensins, as well as a limited amount (nanograms) of LL-37. All the effects of AA and 2-AG mentioned above were prevented by inhibiting LTB(4) biosynthesis or by blocking BLT(1). Importantly, neither CB(2) receptor agonists nor antagonists could mimic nor prevent the effects of 2-AG, respectively. In fact, qPCR data show that contaminating eosinophils express ∼100-fold more CB(2) receptor mRNA than purified neutrophils, suggesting that CB(2) receptor expression by human neutrophils is limited and that contaminating eosinophils are likely responsible for the previously documented CB(2) expression by freshly isolated human neutrophils. The rapid conversion of 2-AG to AA and their subsequent metabolism into LTB(4) promote 2-AG and AA as multifunctional activators of neutrophils, mainly exerting their effects by activating the BLT(1). Considering that nanomolar concentrations of AA or 2-AG were sufficient to impair viral infectivity, this suggests potential physiological roles for 2-AG and AA as regulators of host defense in vivo.
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Affiliation(s)
- François Chouinard
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Caroline Turcotte
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Xiaochun Guan
- Centre de Recherche du CHUM, Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Canada
| | - Marie-Chantal Larose
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Samuel Poirier
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Line Bouchard
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Véronique Provost
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Louis Flamand
- Centre de Recherche du CHUQ, Département de Microbiologie, Infectiologie et Immunologie, Université Laval, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
| | - Nathalie Grandvaux
- Centre de Recherche du CHUM, Département de Biochimie, Faculté de Médecine, Université de Montréal, Montréal, Canada
| | - Nicolas Flamand
- Centre de Recherche de l’Institut Universitaire de Cardiologie et de Pneumologie de Québec, Département de Médecine, Québec City, Canada
- Faculté de Médecine, Université Laval, Québec City, Canada
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Barletta KE, Ley K, Mehrad B. Regulation of neutrophil function by adenosine. Arterioscler Thromb Vasc Biol 2012; 32:856-64. [PMID: 22423037 DOI: 10.1161/atvbaha.111.226845] [Citation(s) in RCA: 185] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Adenosine is an endogenously released purine nucleoside that signals via 4 widely expressed G protein-coupled receptors: A(1), A(2A), A(2B), and A(3). In the setting of inflammation, the generation and release of adenosine is greatly enhanced. Neutrophils play an important role in host defense against invading pathogens and are the cellular hallmark of acute inflammation. Neutrophils both release adenosine and can respond to it via expression of all 4 adenosine receptor subtypes. At low concentrations, adenosine can act via the A(1) and A(3) adenosine receptor subtypes to promote neutrophil chemotaxis and phagocytosis. At higher concentrations, adenosine acts at the lower-affinity A(2A) and A(2B) receptors to inhibit neutrophil trafficking and effector functions such as oxidative burst, inflammatory mediator production, and granule release. Modulation of neutrophil function by adenosine is relevant in a broad array of disease models, including ischemia reperfusion injury, sepsis, and noninfectious acute lung injury. This review will summarize relevant research in order to provide a framework for understanding how adenosine directly regulates various elements of neutrophil function.
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Affiliation(s)
- Kathryn E Barletta
- Department of Pharmacology, University of Virginia, Charlottesville, USA
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Kocic G, Nikolic J, Jevtovic-Stoimenov T, Sokolovic D, Kocic H, Cvetkovic T, Pavlovic D, Cencic A, Stojanovic D. L-arginine intake effect on adenine nucleotide metabolism in rat parenchymal and reproductive tissues. ScientificWorldJournal 2012; 2012:208239. [PMID: 22623885 PMCID: PMC3349330 DOI: 10.1100/2012/208239] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 01/03/2012] [Indexed: 01/23/2023] Open
Abstract
L-arginine is conditionally essetcial amino acid, required for normal cell growth, protein synthesis, ammonia detoxification, tissue growth and general performance, proposed in the treatment of men sterility and prevention of male impotence. The aim of the present paper was to estimate the activity of the enzymes of adenine nucleotide metabolism: 5'-nucleotidase (5'-NU), adenosine deaminase (ADA), AMP deaminase, and xanthine oxidase (XO), during dietary intake of L-arginine for a period of four weeks of male Wistar rats. Adenosine concentration in tissues is maintained by the relative activities of the adenosine-producing enzyme, 5'-NU and the adenosine-degrading enzyme-ADA adenosine deaminase. Dietary L-arginine intake directed adenine nucleotide metabolism in liver, kidney, and testis tissue toward the activation of adenosine production, by increased 5'-NU activity and decreased ADA activity. Stimulation of adenosine accumulation could be of importance in mediating arginine antiatherosclerotic, vasoactive, immunomodulatory, and antioxidant effects. Assuming that the XO activity reflects the rate of purine catabolism in the cell, while the activity of AMP deaminase is of importance in ATP regeneration, reduced activity of XO, together with the increased AMP-deaminase activity, may suggest that adenine nucleotides are presumably directed to the ATP regenerating process during dietary L-arginine intake.
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Affiliation(s)
- G Kocic
- Institute of Biochemistry, Faculty of Medicine, University of Nis, Bulevar Dr Zorana Djindjica 81, Nis, Serbia.
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Matera MG, Calzetta L, Segreti A, Cazzola M. Emerging drugs for chronic obstructive pulmonary disease. Expert Opin Emerg Drugs 2012; 17:61-82. [DOI: 10.1517/14728214.2012.660917] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Impellizzeri D, Di Paola R, Esposito E, Mazzon E, Paterniti I, Melani A, Bramanti P, Pedata F, Cuzzocrea S. CGS 21680, an agonist of the adenosine (A2A) receptor, decreases acute lung inflammation. Eur J Pharmacol 2011; 668:305-16. [PMID: 21756897 DOI: 10.1016/j.ejphar.2011.06.049] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 06/17/2011] [Accepted: 06/27/2011] [Indexed: 12/21/2022]
Abstract
Adenosine A(2A) receptor agonists may be important regulators of inflammation. The aim of this study was to investigate the effects of CGS 21680 (0.1mg/kgi.p.), an agonist of the adenosine (A(2A)) receptor, in a mouse model of carrageenan-induced pleurisy. Injection of carrageenan into the pleural cavity of mice elicited an acute inflammatory response characterised by: infiltration of neutrophils in lung tissues and subsequent lipid peroxidation, increased production of nitric oxide (NO), cytokines such as tumour necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) and increased expression of intercellular adhesion molecule (ICAM-1) and platelet-adhesion molecule (P-selectin). Furthermore, carrageenan induced the expression of nuclear factor-κB (NF-κB), inducible nitric oxide synthase (iNOS), nitrotyrosine, the activation of poly-ADP-ribosyl polymerase (PARP), as well as induced apoptosis (FAS-ligand expression, Bax and Bcl-2 expression) in the lung tissues. Administration of CGS 21680, 30 min prior to challenge with carrageenan, caused a significant reduction of all the parameters of inflammation measured. In addition, to confirm the anti-inflammatory effect of CGS 21680, we have also evaluated the effects of CGS 21680 post-treatment (30 min after the challenge with carrageenan) and we have demonstrated that also it caused a reduction of neutrophil infiltration and the degree of lung injury. Thus, based on these findings we propose that adenosine A(2A) receptor agonists such as CGS 21680 may be useful in the treatment of various inflammatory diseases.
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Affiliation(s)
- Daniela Impellizzeri
- Department of Clinical and Experimental Medicine and Pharmacology, School of Medicine, University of Messina, Via C. Valeria, Gazzi, 98100 Messina, Italy.
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Bhardwaj R, Skelly PJ. Characterization of schistosome tegumental alkaline phosphatase (SmAP). PLoS Negl Trop Dis 2011; 5:e1011. [PMID: 21483710 PMCID: PMC3071363 DOI: 10.1371/journal.pntd.0001011] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 01/13/2011] [Indexed: 12/20/2022] Open
Abstract
Schistosomes are parasitic platyhelminths that currently infect over 200 million people globally. The parasites can live for years in a putatively hostile environment - the blood of vertebrates. We have hypothesized that the unusual schistosome tegument (outer-covering) plays a role in protecting parasites in the blood; by impeding host immunological signaling pathways we suggest that tegumental molecules help create an immunologically privileged environment for schistosomes. In this work, we clone and characterize a schistosome alkaline phosphatase (SmAP), a predicted ∼60 kDa glycoprotein that has high sequence conservation with members of the alkaline phosphatase protein family. The SmAP gene is most highly expressed in intravascular parasite life stages. Using immunofluorescence and immuno-electron microscopy, we confirm that SmAP is expressed at the host/parasite interface and in internal tissues. The ability of living parasites to cleave exogenous adenosine monophosphate (AMP) and generate adenosine is very largely abolished when SmAP gene expression is suppressed following RNAi treatment targeting the gene. These results lend support to the hypothesis that schistosome surface enzymes such as SmAP could dampen host immune responses against the parasites by generating immunosuppressants such as adenosine to promote their survival. This notion does not rule out other potential functions for the adenosine generated e.g. in parasite nutrition. Schistosomes are parasitic worms that live for many years in the blood stream of ∼200 million people globally. How they manage to avoid getting killed by host immune mechanisms is a puzzle. We hypothesize that molecules in their skin (tegument), e.g. the enzyme alkaline phosphatase (SmAP), help them in this regard. In this work, we characterize SmAP. It is predicted to be a ∼60 kDa glycoprotein that is most highly expressed in those parasite life stages that live inside a mammalian host. We confirm that SmAP is expressed at the host/parasite interface as well as in internal tissues. To monitor the function of the enzyme, we have suppressed the expression of the SmAP gene using RNA interference. These parasites largely loose their ability to cleave the added substrate AMP (adenosine monophosphate) to generate adenosine. Since adenosine is very efficient at dampening host immune mechanisms, our work lends support to the idea that one function for tegumental SmAP is to generate the immunosuppressant adenosine so that the worms can remain unperturbed by host immune effectors. Our results do not preclude other functions for the generated adenosine. For example it could also be taken up as a nutrient by the parasites.
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Affiliation(s)
- Rita Bhardwaj
- Molecular Helminthology Laboratory, Division of Infectious Diseases, Department of Biomedical Sciences, Cummings School of Veterinary Medicine, Tufts University, Grafton, Massachusetts, United States of America
| | - Patrick J. Skelly
- Molecular Helminthology Laboratory, Division of Infectious Diseases, Department of Biomedical Sciences, Cummings School of Veterinary Medicine, Tufts University, Grafton, Massachusetts, United States of America
- * E-mail:
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Chouinard F, Lefebvre JS, Navarro P, Bouchard L, Ferland C, Lalancette-Hébert M, Marsolais D, Laviolette M, Flamand N. The endocannabinoid 2-arachidonoyl-glycerol activates human neutrophils: critical role of its hydrolysis and de novo leukotriene B4 biosynthesis. THE JOURNAL OF IMMUNOLOGY 2011; 186:3188-96. [PMID: 21278347 DOI: 10.4049/jimmunol.1002853] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although endocannabinoids are important players in nociception and obesity, their roles as immunomodulators remain elusive. The main endocannabinoids described to date, namely 2-arachidonoyl-glycerol (2-AG) and arachidonyl-ethanolamide (AEA), induce an intriguing profile of pro- and anti-inflammatory effects. This could relate to cell-specific cannabinoid receptor expression and/or the action of endocannabinoid-derived metabolites. Importantly, 2-AG and AEA comprise a molecule of arachidonic acid (AA) in their structure and are hydrolyzed rapidly. We postulated the following: 1) the released AA from endocannabinoid hydrolysis would be metabolized into eicosanoids; and 2) these eicosanoids would mediate some of the effects of endocannabinoids. To confirm these hypotheses, experiments were performed in which freshly isolated human neutrophils were treated with endocannabinoids. Unlike AEA, 2-AG stimulated myeloperoxidase release, kinase activation, and calcium mobilization by neutrophils. Although 2-AG did not induce the migration of neutrophils, it induced the release of a migrating activity for neutrophils. 2-AG also rapidly (1 min) induced a robust biosynthesis of leukotrienes, similar to that observed with AA. The effects of 2-AG were not mimicked nor prevented by cannabinoid receptor agonists or antagonists, respectively. Finally, the blockade of either 2-AG hydrolysis, leukotriene (LT) B(4) biosynthesis, or LTB(4) receptor 1 activation prevented all the effects of 2-AG on neutrophil functions. In conclusion, we demonstrated that 2-AG potently activates human neutrophils. This is the consequence of 2-AG hydrolysis, de novo LTB(4) biosynthesis, and an autocrine activation loop involving LTB(4) receptor 1.
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Affiliation(s)
- François Chouinard
- Centre de recherche de l'Institut universitaire de cardiologie et de pneumologie de Québec, Université Laval, Québec City, Québec G1V 4G5, Canada
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Abstract
Neutrophils are well-recognized phagocytes in the first line of host defense, and are also a major source of pro-inflammatory cytokines, chemokines and lipid mediators, thereby contributing to the onset and early orchestration of the inflammatory response. In contrast, recent studies indicate that neutrophils have tools to limit the magnitude and length of an inflammatory response, and may take part in engaging the resolution process. This article describes endogenous signals that may transform the phenotype of a neutrophil: from a pro-inflammatory cell to one that promotes resolution. Adenosine, an autacoid which can be found at high concentrations in inflammatory sites, inhibits several inflammatory functions of the neutrophil via engagement of the A2A receptor and reshapes the profile of lipid mediators and cytokines released, causing cells to terminate the release of pro-inflammatory signals while progressing toward resolution. These endogenous resolution pathways may represent a key target for better treatments of inflammatory diseases.
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Affiliation(s)
- Aline Dumas
- Centre de recherche en rhumatologie et immunologie du CHUQ, et département d'anatomie-physiologie, CHUL, Faculté de médecine, Université Laval, 2705, boulevard Laurier, bureau T1-49, Québec (Québec), G1V 4G2 Canada.
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Adenosine: an endogenous modulator of innate immune system with therapeutic potential. Eur J Pharmacol 2009; 616:7-15. [PMID: 19464286 DOI: 10.1016/j.ejphar.2009.05.005] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2008] [Revised: 05/02/2009] [Accepted: 05/14/2009] [Indexed: 12/13/2022]
Abstract
Adenosine is a purine nucleoside, which is produced inside the body under metabolic stress like hypoxic conditions, acute or chronic inflammatory tissue insults. The synthesis of adenosine involves the catabolism of adenine nucleotides (ATP, ADP and AMP) by the action of extracellular ectonucleotidases i.e. CD39 or nucleoside triphosphate dephosphorylase (NTPD) and CD73 or 5'-ectonucleotidase. Once adenosine is released in the extracellular environment, it binds to different types of adenosine (i.e. adenosine A(1), A(2A), A(2B) and A(3) receptors) receptors expressed on various innate immune cells [Neutrophils, macrophages, mast cells, dendritic cells and natural killer cells]. Thus, depending on the type of adenosine receptor to which it binds, adenosine modulates innate immune response during various inflammatory conditions [i.e. chronic (cancer, asthma) as well as acute (sepsis, acute lung injury) inflammatory diseases]. This review summarizes the effect of adenosine on innate immunity and the use of adenosine receptor specific agonists or antagonists in various immunologic disorders (asthma, cancer, HIV-1 infection) as future immunomodulatory therapeutics.
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Purinergic signaling and immune modulation at the schistosome surface? Trends Parasitol 2009; 25:256-60. [PMID: 19423396 DOI: 10.1016/j.pt.2009.03.004] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Revised: 02/25/2009] [Accepted: 03/04/2009] [Indexed: 12/20/2022]
Abstract
After tissue stress or injury, intracellular ATP can be released into the extracellular environment. This signals cell damage because extracellular ATP acts as a danger-associated molecular pattern (DAMP) that is potently proinflammatory. Vertebrates temper this effect by catabolizing ATP to adenosine - a strongly anti-inflammatory molecule - using a set of characterized ecto-enzymes (notably alkaline phosphatase, phosphodiesterase and ATP diphosphohydrolase). Strikingly, schistosomes in the bloodstream have this same set of ATP-catabolizing enzymes on their tegumental surfaces. It is our opinion that these function to remove the DAMP (ATP) released by host cells in response to schistosome intravascular migration. We propose this as one mechanism by which schistosomes prevent their hosts from focusing immunological mediators in their vicinity.
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St-Onge M, Dumas A, Michaud A, Laflamme C, Dussault AA, Pouliot M. Impact of anti-inflammatory agents on the gene expression profile of stimulated human neutrophils: unraveling endogenous resolution pathways. PLoS One 2009; 4:e4902. [PMID: 19295914 PMCID: PMC2654409 DOI: 10.1371/journal.pone.0004902] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Accepted: 02/09/2009] [Indexed: 01/25/2023] Open
Abstract
Adenosine, prostaglandin E(2), or increased intracellular cyclic AMP concentration each elicit potent anti-inflammatory events in human neutrophils by inhibiting functions such as phagocytosis, superoxide production, adhesion and cytokine release. However, the endogenous molecular pathways mediating these actions are poorly understood. In the present study, we examined their impact on the gene expression profile of stimulated neutrophils. Purified blood neutrophils from healthy donors were stimulated with a cocktail of inflammatory agonists in the presence of at least one of the following anti-inflammatory agents: adenosine A(2A) receptor agonist CGS 21680, prostaglandin E(2), cyclic-AMP-elevating compounds forskolin and RO 20-1724. Total RNA was analyzed using gene chips and real-time PCR. Genes encoding transcription factors, enzymes and regulatory proteins, as well as secreted cytokines/chemokines showed differential expression. We identified 15 genes for which the anti-inflammatory agents altered mRNA levels. The agents affected the expression profile in remarkably similar fashion, suggesting a central mechanism limiting cell activation. We have identified a set of genes that may be part of important resolution pathways that interfere with cell activation. Identification of these pathways will improve understanding of the capacity of tissues to terminate inflammatory responses and contribute to the development of therapeutic strategies based on endogenous resolution.
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Affiliation(s)
- Mireille St-Onge
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Aline Dumas
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Annick Michaud
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Cynthia Laflamme
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Andrée-Anne Dussault
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Marc Pouliot
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec City, Quebec, Canada
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Abstract
Extracellular adenosine is produced in a coordinated manner from cells following cellular challenge or tissue injury. Once produced, it serves as an autocrine- and paracrine-signaling molecule through its interactions with seven-membrane-spanning G-protein-coupled adenosine receptors. These signaling pathways have widespread physiological and pathophysiological functions. Immune cells express adenosine receptors and respond to adenosine or adenosine agonists in diverse manners. Extensive in vitro and in vivo studies have identified potent anti-inflammatory functions for all of the adenosine receptors on many different inflammatory cells and in various inflammatory disease processes. In addition, specific proinflammatory functions have also been ascribed to adenosine receptor activation. The potent effects of adenosine signaling on the regulation of inflammation suggest that targeting specific adenosine receptor activation or inactivation using selective agonists and antagonists could have important therapeutic implications in numerous diseases. This review is designed to summarize the current status of adenosine receptor signaling in various inflammatory cells and in models of inflammation, with an emphasis on the advancement of adenosine-based therapeutics to treat inflammatory disorders.
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Affiliation(s)
- Michael R Blackburn
- Department of Biochemistry and Molecular Biology, The University of Texas-Houston Medical School, Houston, TX 77030, USA.
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Berry KAZ, Henson PM, Murphy RC. Effects of Acrolein on Leukotriene Biosynthesis in Human Neutrophils. Chem Res Toxicol 2008; 21:2424-32. [DOI: 10.1021/tx800333u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Karin A. Zemski Berry
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
| | - Peter M. Henson
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
| | - Robert C. Murphy
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
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van der Hoeven D, Wan TC, Auchampach JA. Activation of the A(3) adenosine receptor suppresses superoxide production and chemotaxis of mouse bone marrow neutrophils. Mol Pharmacol 2008; 74:685-96. [PMID: 18583455 DOI: 10.1124/mol.108.048066] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Adenosine is formed in injured/ischemic tissues, where it suppresses the actions of essentially all cells of the immune system. Most of the anti-inflammatory actions of adenosine have been attributed to signaling through the G(s) protein-coupled A(2A) adenosine receptor (AR). Here, we report that the A(3)AR is highly expressed in murine neutrophils isolated from bone marrow. Selective activation of the A(3)AR with (2S,3S,4R,5R)-3-amino-5-[6-(2,5-dichlorobenzylamino)purin-9-yl]-4-hydroxytetrahydrofuran-2-carboxylic acid methylamide (CP-532,903) potently inhibited mouse bone marrow neutrophil superoxide generation and chemotaxis induced by various activating agents. The selectivity of CP-532,903 was confirmed in assays using neutrophils obtained from A(2A)AR and A(3)AR gene "knockout" mice. In a model of thioglycollate-induced inflammation, treating mice with CP-532,903 inhibited recruitment of leukocytes into the peritoneum by specifically activating the A(3)AR. Collectively, our findings support the theory that the A(3)AR contributes to the anti-inflammatory actions of adenosine on neutrophils and provide a potential mechanistic explanation for the efficacy of A(3)AR agonists in animal models of inflammation (i.e., inhibition of neutrophil-mediated tissue injury).
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Affiliation(s)
- Dharini van der Hoeven
- Department of Pharmacology and Cardiovascular Center, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA
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YC-1 attenuates homotypic human neutrophil aggregation through inhibition of phosphodiesterase activity. Eur J Pharmacol 2007; 579:395-402. [PMID: 18001706 DOI: 10.1016/j.ejphar.2007.10.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 10/04/2007] [Accepted: 10/16/2007] [Indexed: 11/22/2022]
Abstract
This study was undertaken to assess the effects of 3-(5'-hydroxymethyl-2'-furyl)-1-benzyl indazole (YC-1), a known activator of soluble guanylyl cyclase, on formyl-l-methionyl-l-leucyl-l-phenylalanine (FMLP) and complement component 5a (C5a)-induced homotypic human neutrophil aggregation. YC-1 as well as the phosphodiesterase (PDE)4 inhibitors rolipram and Ro 20-1724, but not the PDE3 inhibitor milrinone, inhibited the aggregation responses stimulated by FMLP and C5a. In contrast, sodium nitroprusside (SNP) had no effect on FMLP- or C5a-induced neutrophil aggregation. Moreover, SNP together with YC-1 failed to modify the YC-1-induced responses. In addition, YC-1 and rolipram, but not milrinone, induced substantial increases in cAMP levels, which occurred through the inhibition of PDE activity but not an increase in adenylate cyclase function. Interestingly, adenosine deaminase abolished the inhibitory effects and cAMP levels of YC-1, rolipram, and Ro 20-1724. In conclusion, these results indicate that the inhibitory effect of YC-1 on homotypic neutrophil aggregation is attributed to an elevation in the cAMP concentration through inhibition of the activity of PDE, which may potentiate the autocrine functions of endogenous adenosine.
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Hwang TL, Yeh SH, Leu YL, Chern CY, Hsu HC. Inhibition of superoxide anion and elastase release in human neutrophils by 3'-isopropoxychalcone via a cAMP-dependent pathway. Br J Pharmacol 2007; 148:78-87. [PMID: 16501579 PMCID: PMC1617051 DOI: 10.1038/sj.bjp.0706712] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
1 Chalcone is abundantly present in the plant kingdom and has various biological activities such as anti-inflammatory and antioxidant. In this study, the semisynthetic chalcone derivative, 3'-isopropoxychalcone (H2O7D), was demonstrated to inhibit the generation of superoxide and the release of elastase, as well as to accelerate resequestration of cytosolic calcium in formyl-L-methionyl-L-leucyl-L-phenylalanine-activated human neutrophils. 2 H2O7D displayed no antioxidant or superoxide-scavenging ability, and it failed to alter the subcellular NADPH oxidase activity. 3 H2O7D induced a substantial increase in cAMP but not cGMP levels. The elevation of cAMP formation by H2O7D was inhibited by adenosine deaminase (ADA). Furthermore, The inhibitory effects of H2O7D were reversed by protein kinase (PK)A inhibitors, as well as ADA and a selective A2a-receptor antagonist. 4 H2O7D inhibited phosphodiesterase (PDE) activities, but it did not alter adenylyl cyclase and soluble guanylyl cyclase activities. These results show that the cAMP-elevating effect of H2O7D results from the inhibition of PDE activity and not from the stimulation of cyclase function. Consistent with this, H2O7D potentiated the PGE(1)-caused inhibitory effects and cAMP formation. 5 In summary, these results indicate that the inhibitory effect of H2O7D is cAMP/PKA dependent, and that it occurs through inhibition of cAMP PDE, which potentiates the autocrine functions of endogenous adenosine. Inhibition of respiratory burst and degranulation in human neutrophils may give this drug the potential to protect against the progression of inflammation.
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Affiliation(s)
- Tsong-Long Hwang
- Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Kweishan, Taoyuan 333, Taiwan.
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Abstract
Leukotrienes are metabolites of arachidonic acid derived from the action of 5-LO (5-lipoxygenase). The immediate product of 5-LO is LTA4 (leukotriene A4), which is enzymatically converted into either LTB4 (leukotriene B4) by LTA4 hydrolase or LTC4 (leukotriene C4) by LTC4 synthase. The regulation of leukotriene production occurs at various levels, including expression of 5-LO, translocation of 5-LO to the perinuclear region and phosphorylation to either enhance or inhibit the activity of 5-LO. Several other proteins, including cPLA2α (cytosolic phospholipase A2α) and FLAP (5-LO-activating protein) also assemble at the perinuclear region before production of LTA4. LTC4 synthase is an integral membrane protein that is present at the nuclear envelope; however, LTA4 hydrolase remains cytosolic. Biologically active LTB4 is metabolized by ω-oxidation carried out by specific cytochrome P450s (CYP4F) followed by β-oxidation from the ω-carboxy position and after CoA ester formation. Other specific pathways of leukotriene metabolism include the 12-hydroxydehydrogenase/15-oxo-prostaglandin-13-reductase that forms a series of conjugated diene metabolites that have been observed to be excreted into human urine. Metabolism of LTC4 occurs by sequential peptide cleavage reactions involving a γ-glutamyl transpeptidase that forms LTD4 (leukotriene D4) and a membrane-bound dipeptidase that converts LTD4 into LTE4 (leukotriene E4) before ω-oxidation. These metabolic transformations of the primary leukotrienes are critical for termination of their biological activity, and defects in expression of participating enzymes may be involved in specific genetic disease.
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Affiliation(s)
- Robert C Murphy
- Department of Pharmacology, Mail Stop 8303, University of Colorado at Denver and Health Sciences Center, 12801 E. 17th Avenue, P.O. Box 6511, Aurora, CO 80045-0511, USA
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41
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Fialkow L, Wang Y, Downey GP. Reactive oxygen and nitrogen species as signaling molecules regulating neutrophil function. Free Radic Biol Med 2007; 42:153-64. [PMID: 17189821 DOI: 10.1016/j.freeradbiomed.2006.09.030] [Citation(s) in RCA: 458] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 09/27/2006] [Accepted: 09/28/2006] [Indexed: 02/06/2023]
Abstract
As a cornerstone of the innate immune response, neutrophils are the archetypical phagocytic cell; they actively seek out, ingest, and destroy pathogenic microorganisms. To achieve this essential role in host defense, neutrophils deploy a potent antimicrobial arsenal that includes oxidants, proteinases, and antimicrobial peptides. Importantly, oxidants produced by neutrophils, referred to in this article as reactive oxygen (ROS) and reactive nitrogen (RNS) species, have a dual function. On one hand they function as potent antimicrobial agents by virtue of their ability to kill microbial pathogens directly. On the other hand, they participate as signaling molecules that regulate diverse physiological signaling pathways in neutrophils. In the latter role, ROS and RNS serve as modulators of protein and lipid kinases and phosphatases, membrane receptors, ion channels, and transcription factors, including NF-kappaB. The latter regulates expression of key cytokines and chemokines that further modulate the inflammatory response. During the inflammatory response, ROS and RNS modulate phagocytosis, secretion, gene expression, and apoptosis. Under pathological circumstances such as acute lung injury and sepsis, excess production of ROS may influence vicinal cells such as endothelium or epithelium, contributing to inflammatory tissue injury. A better understanding of these pathways will help identify novel targets for amelioration of the untoward effects of inflammation.
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Affiliation(s)
- Lea Fialkow
- Faculty of Medicine, Universidade Federal do Rio Grande do Sul, Intensive Care Unit, Intensive Care Division, Hospital de Clínicas de Porto Alegre, Rio Grande do Sul, Brazil
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42
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Hwang TL, Leu YL, Kao SH, Tang MC, Chang HL. Viscolin, a new chalcone from Viscum coloratum, inhibits human neutrophil superoxide anion and elastase release via a cAMP-dependent pathway. Free Radic Biol Med 2006; 41:1433-41. [PMID: 17023270 DOI: 10.1016/j.freeradbiomed.2006.08.001] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Accepted: 08/02/2006] [Indexed: 10/24/2022]
Abstract
The mistletoe Viscum coloratum is used in traditional Chinese medicine to treat inflammatory diseases. In this study, a cellular model in isolated human neutrophils, which are important in the pathogenesis of rheumatoid arthritis, chronic obstructive pulmonary disease, and other inflammatory diseases, was established to elucidate the anti-inflammatory functions of V. coloratum. The partially purified extract of V. coloratum (PPE-SVC) potently inhibited formyl-L-methionyl-L-leucyl-L-phenylalanine (FMLP)-induced superoxide anion generation and elastase release in a concentration-dependent manner with IC(50) values of 0.58+/-0.03 and 4.93+/-0.54 microg/ml, respectively. Furthermore, a new chalcone derivative, viscolin (4',4''-dihydroxy-2',3',6',3''-tetramethoxy-1,3-diphenylpropane), was isolated from PPE-SVC. Viscolin was demonstrated to inhibit superoxide anion generation and elastase release, as well as to accelerate resequestration of cytosolic calcium in FMLP-activated human neutrophils. Furthermore, the inhibitory effects of viscolin were reversed by protein kinase A (PKA) inhibitor, suggesting that PKA mediates the viscolin-caused inhibitions. Viscolin induced a substantial increase in cAMP levels, and that occurred through the inhibition of phosphodiesterase (PDE) activity but not an increase in adenylate cyclase function. Consistent with this, viscolin potentiated the PGE(1)-caused inhibition of superoxide anion release and calcium mobilization, as well as elevation of cAMP formation. These results demonstrate that inhibition of inflammatory responses in human neutrophils by viscolin is associated with an elevation of cellular cAMP through inhibition of PDE. Comparable results were also observed by PPE-SVC, indicating that the effect of PPE-SVC is at least partly mediated by viscolin. In summary, viscolin is a novel inhibitor of PDE and might be useful for treatment of neutrophilic inflammation.
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Affiliation(s)
- Tsong-Long Hwang
- Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Kweishan 333, Taoyuan, Taiwan.
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43
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Bours MJL, Swennen ELR, Di Virgilio F, Cronstein BN, Dagnelie PC. Adenosine 5'-triphosphate and adenosine as endogenous signaling molecules in immunity and inflammation. Pharmacol Ther 2006; 112:358-404. [PMID: 16784779 DOI: 10.1016/j.pharmthera.2005.04.013] [Citation(s) in RCA: 766] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2005] [Accepted: 04/20/2005] [Indexed: 02/07/2023]
Abstract
Human health is under constant threat of a wide variety of dangers, both self and nonself. The immune system is occupied with protecting the host against such dangers in order to preserve human health. For that purpose, the immune system is equipped with a diverse array of both cellular and non-cellular effectors that are in continuous communication with each other. The naturally occurring nucleotide adenosine 5'-triphosphate (ATP) and its metabolite adenosine (Ado) probably constitute an intrinsic part of this extensive immunological network through purinergic signaling by their cognate receptors, which are widely expressed throughout the body. This review provides a thorough overview of the effects of ATP and Ado on major immune cell types. The overwhelming evidence indicates that ATP and Ado are important endogenous signaling molecules in immunity and inflammation. Although the role of ATP and Ado during the course of inflammatory and immune responses in vivo appears to be extremely complex, we propose that their immunological role is both interdependent and multifaceted, meaning that the nature of their effects may shift from immunostimulatory to immunoregulatory or vice versa depending on extracellular concentrations as well as on expression patterns of purinergic receptors and ecto-enzymes. Purinergic signaling thus contributes to the fine-tuning of inflammatory and immune responses in such a way that the danger to the host is eliminated efficiently with minimal damage to healthy tissues.
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Affiliation(s)
- M J L Bours
- Maastricht University, Department of Epidemiology, Nutrition and Toxicology Research Institute Maastricht, P.O. Box 616, 6200 MD Maastricht, The Netherlands.
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44
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Burks EJ, Loughran TP. Pathogenesis of neutropenia in large granular lymphocyte leukemia and Felty syndrome. Blood Rev 2006; 20:245-66. [PMID: 16530306 DOI: 10.1016/j.blre.2006.01.003] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
T-cell large granular lymphocyte leukemia (TLGL) is an atypical chronic lymphoproliferative disorder derived from cytotoxic T-cells (CTL). Unlike most forms of leukemia, the pattern of bone marrow infiltration in TLGL may be subtle and the cytopenias are often lineage specific, with neutropenia dominating. Both granulocytic survival and proliferation defects are observed and are mediated by humoral and cell-mediated mechanisms respectively. Splenic production of immune complexes induces a neutrophil survival defect, where as Fas expression by leukemic CTL results in a marrow based proliferation defect. These humoral and cell-mediated pathways induce granulocytic apoptosis through independent intracellular mechanisms which are not mutually exclusive and may be observed concurrently in individual patients with either TLGL or FS. A variety of therapeutic interventions have been utilized in the management of TLGL and Felty syndrome, including methotrexate, cyclosporine A, cyclophosphamide, glucocorticoids, myeloid colony stimulating factors and splenectomy. Their efficacy and mechanisms of action are reviewed.
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Affiliation(s)
- Eric J Burks
- Harvard School of Medicine, Brigham and Women's Hospital, Department of Pathology, Boston, MA 02115, USA.
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Flamand N, Lefebvre J, Lapointe G, Picard S, Lemieux L, Bourgoin SG, Borgeat P. Inhibition of platelet-activating factor biosynthesis by adenosine and histamine in human neutrophils: involvement of cPLA2alpha and reversal by lyso-PAF. J Leukoc Biol 2006; 79:1043-51. [PMID: 16501051 DOI: 10.1189/jlb.1005614] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Leukotrienes (LT) and platelet-activating factor (PAF) are important lipid mediators of inflammation. We and others reported previously that autacoids such as adenosine, histamine, prostaglandin E2, and beta-adrenergic agents inhibit LT biosynthesis in activated human polymorphonuclear leukocytes (PMN). In this study, we demonstrate that CGS-21680 (a selective agonist of the adenosine A2A receptor) and histamine also potently inhibit PAF biosynthesis in agonist [formyl Met-Leu-Phe (fMLP)]- and thapsigargin-activated human PMN. The observed inhibitions of PAF biosynthesis were reversed effectively by exogenous 1-O-alkyl-lyso-sn-glyceryl-3-phosphocholine (lyso-PAF), suggesting that these effects of CGS-21680 and histamine implicate the blockade of cytosolic phospholipase A2alpha (cPLA2alpha) activity and lyso-PAF release and that the acetyl-coenzyme A/lyso-PAF acetyl transferase is not inhibited by the autacoids. Accordingly, the cPLA2alpha inhibitor pyrrophenone completely blocked PAF formation, and lyso-PAF similarly prevented this effect of pyrrophenone. The inhibitory effects of CGS-21680 and histamine on PAF biosynthesis were prevented by the protein kinase A inhibitor H-89, supporting roles for the Gs -coupled receptors A2A and H2, respectively, and cyclic adenosine monophosphate in the inhibitory mechanism. The fMLP-induced phosphorylations of p38 and extracellular signal-regulated kinase 1/2 were not altered significantly by the CGS-21680, indicating that inhibition of these kinases is not involved in the inhibitory effect of the adenosine A2A receptor ligand on LT and PAF biosynthesis. These data further emphasize the multiple and potent inhibitory effects of adenosine and histamine on leukocyte functions, in particular, on the biosynthesis of two classes of important lipid mediators and their putative regulatory roles in immune processes in health and diseases.
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Affiliation(s)
- Nicolas Flamand
- Centre de Recherche du Rhumatologie et Immunologie, Centre de Recherche du CHUQ (CHUL), Faculté de Médecine, Université Laval, Québec, Canada G1V 4G2
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46
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Carraway RE, Hassan S, Cochrane DE. Regulation of neurotensin receptor function by the arachidonic acid-lipoxygenase pathway in prostate cancer PC3 cells. Prostaglandins Leukot Essent Fatty Acids 2006; 74:93-107. [PMID: 16406549 DOI: 10.1016/j.plefa.2005.11.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Revised: 11/04/2005] [Accepted: 11/09/2005] [Indexed: 11/19/2022]
Abstract
Neurotensin (NT) elevates leukotriene levels in animals and stimulates 5-HETE formation in prostate cancer PC3 cells. PC3 cell growth is stimulated by NT and inhibited by lipoxygenase (LOX) blockers. This led us to test LOX blockers (NDGA, MK886, ETYA, Rev5901, AA861 and others) for effects on NT binding and signaling. LOX blockers dramatically enhanced 125I-neurotensin binding to NT receptor NTR1 in PC3 cells, whereas they inhibited NT-induced inositol phosphate formation. These effects were indirect (binding to isolated membranes was unaffected), receptor-specific (binding to beta2-adrenergic, V1a-vasopressin, EGF and bombesin receptor was unaffected) and pathway-specific (cyclooxygenase inhibitors were inactive). NT receptor affinity was increased but receptor number and % internalization were unchanged. Also supporting the involvement of arachidonic acid metabolism in NTR1 regulation was the finding that inhibitors of PLA2 and DAG lipase enhanced NT binding. These findings suggest that NTR1 is regulated by specific feedback mechanism(s) involving lipid peroxidation and/or LOX-dependent processes.
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Affiliation(s)
- Robert E Carraway
- Department of Physiology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655, USA.
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Fortin A, Harbour D, Fernandes M, Borgeat P, Bourgoin S. Differential expression of adenosine receptors in human neutrophils: up-regulation by specific Th1 cytokines and lipopolysaccharide. J Leukoc Biol 2005; 79:574-85. [PMID: 16387843 DOI: 10.1189/jlb.0505249] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Four types of adenosine receptors have been identified in different tissues and cell types, namely, A1, A2A, A2B, and A3 receptors. We report that A2AR but not A2BR mRNA in freshly isolated polymorphonuclear neutrophils (PMN) is maximally up-regulated after 4 h stimulation with lipopolysaccharide (LPS) or tumor necrosis factor alpha (TNF-alpha) and to a lesser extent, with interleukin (IL)-1beta. These effects were maintained up to 21 h. Consistent with changes in A2AR mRNA expression, up-regulation of A2AR protein was also detected after 4 h of LPS or TNF-alpha exposure. Up-regulation of A2AR protein expression was transient and returned to near basal levels after 12 h or 16 h stimulation with TNF-alpha or LPS, respectively. Conversely, IL-1beta failed to promote A2AR protein expression. Suppression of thapsigargin-induced leukotriene synthesis by the selective A2AR agonist CGS-21680 was found to be more pronounced when PMN were cultured for 4 h with LPS or TNF-alpha. In contrast, the up-regulation of A2AR has no impact on CGS-21680-induced inhibition of phospholipase D activation and superoxide production in response to formyl-Met-Leu-Phe. These results demonstrate that the A2AR is up-regulated by specific T helper cell type 1 cytokines and LPS. Although this could represent a potential feedback mechanism to control inflammation, the effect of A2AR up-regulation varied depending on the stimulus used to stimulate PMN functional responses after their incubation with proinflammatory mediators.
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Affiliation(s)
- Andrée Fortin
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Pavillon C.H.U.L., 2705 Blvd. Laurier, Sainte-Foy, Québec, Canada G1V 4G2
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48
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McColl SR, St-Onge M, Dussault AA, Laflamme C, Bouchard L, Boulanger J, Pouliot M. Immunomodulatory impact of the A2A adenosine receptor on the profile of chemokines produced by neutrophils. FASEB J 2005; 20:187-9. [PMID: 16280366 PMCID: PMC2881301 DOI: 10.1096/fj.05-4804fje] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In LPS-stimulated human neutrophils, engagement of the adenosine A2A receptor selectively prevented the expression and release of TNF-alpha, MIP-1alpha/CCL3, MIP-1beta/CCL4, MIP-2alpha/CXCL2, and MIP-3alpha/CCL20. In mice lacking the A2A receptor, granulocytes that migrated into the air pouch 4 h after LPS injection expressed higher mRNA levels of TNF-alpha, MIP-1alpha, and MIP-1beta than PMNs from wild-type mice. In mononuclear cells present in the air pouch 72 h after LPS injection, expression of IL-1beta, TNF-alpha, IL-6, and MCP-2/CCL6 was higher in A2AR knockout mice. In addition to highlighting neutrophils as an early and pivotal target for mediating adenosine anti-inflammatory activities, these results identify TNF-alpha and the MIP chemokine family as gene products whose expression is pivotally affected by activation of A2AR in LPS-activated PMNs. Modulation by A2AR in the production of inflammatory signals by PMNs may thus influence the evolution of an inflammatory response by reducing the activation status of inflammatory cells.
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Affiliation(s)
- Shaun R. McColl
- School of Molecular and Biomedical Science, The University of Adelaide, South Australia
| | - Mireille St-Onge
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
| | - Andrée-Anne Dussault
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
| | - Cynthia Laflamme
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
| | - Line Bouchard
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
| | - Jean Boulanger
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
| | - Marc Pouliot
- Centre de Recherche en Rhumatologie et Immunologie du CHUQ (CHUL), and Department of Anatomy-Physiology, Faculty of Medicine, Laval University, Quebec, Canada
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Flamand N, Lefebvre J, Surette ME, Picard S, Borgeat P. Arachidonic acid regulates the translocation of 5-lipoxygenase to the nuclear membranes in human neutrophils. J Biol Chem 2005; 281:129-36. [PMID: 16275640 DOI: 10.1074/jbc.m506513200] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Elevation of the intracellular cAMP concentration in agonist-activated human neutrophils (PMN) leads to the concomitant inhibitions of arachidonic acid (AA) release, 5-lipoxygenase (5-LO) translocation, and leukotriene (LT) biosynthesis. We report herein that exogenous AA completely prevents cAMP-dependent inhibition of 5-LO translocation and LT biosynthesis in agonist-activated PMN. Moreover, the group IVA phospholipase A2 inhibitor pyrrophenone and the MEK inhibitor U-0126 inhibited AA release and 5-LO translocation in activated PMN, and these effects were also prevented by exogenous AA, demonstrating a functional link between AA release and 5-LO translocation. Polyunsaturated fatty acids of the C18 and C20 series containing at least three double bonds located from carbon 9 (or closer to the carboxyl group) were equally effective as AA in restoring 5-LO translocation in pyrrophenone-treated agonist-activated PMN. Importantly, experiments with the 5-LO-activating protein inhibitor MK-0591 and the intracellular Ca2+ chelator BAPTA-AM demonstrated that the AA-regulated 5-LO translocation is FLAP- and Ca2+-dependent. Finally, the redox and competitive 5-LO inhibitors L-685,015, L-739,010, and L-702,539 (but not cyclooxygenase inhibitors) efficiently substituted for AA to reverse the pyrrophenone inhibition of 5-LO translocation, indicating that the site of regulation of 5-LO translocation by AA is at or in the vicinity of the catalytic site. This report demonstrates that AA regulates the translocation of 5-LO in human PMN and unravels a novel mechanism of the cAMP-mediated inhibition of LT biosynthesis.
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Affiliation(s)
- Nicolas Flamand
- Centre de Recherche en Rhumatologie et Immunologie, Université Laval, Québec, Canada G1V 4G2
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50
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Luo M, Jones SM, Flamand N, Aronoff DM, Peters-Golden M, Brock TG. Phosphorylation by protein kinase a inhibits nuclear import of 5-lipoxygenase. J Biol Chem 2005; 280:40609-16. [PMID: 16230355 DOI: 10.1074/jbc.m507045200] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The enzyme 5-lipoxygenase initiates the synthesis of leukotrienes from arachidonic acid. Protein kinase A phosphorylates 5-lipoxygenase on Ser(523), and this reduces its activity. We report here that phosphorylation of Ser(523) also shifts the subcellular distribution of 5-lipoxygenase from the nucleus to the cytoplasm. Phosphorylation and redistribution of 5-lipoxygenase could be produced by overexpression of the protein kinase A catalytic subunit alpha, by pharmacological activators of protein kinase A, and by prostaglandin E(2). Mimicking phosphorylation by replacing Ser(523) with glutamic acid caused cytoplasmic localization; replacement of Ser(523) with alanine prevented phosphorylation and redistribution in response to protein kinase A activation. Because Ser(523) is positioned within the nuclear localization sequence-518 of 5-lipoxygenase, the ability of protein kinase A to phosphorylate and alter the localization of green fluorescent protein fused to the nuclear localization sequence-518 peptide was also tested. Site-directed replacement of Ser(523) with glutamic acid within the peptide impaired nuclear accumulation; overexpression of the protein kinase A catalytic subunit alpha and pharmacological activation of protein kinase caused phosphorylation of the fusion protein at Ser(523), and the phosphorylated protein was found chiefly in the cytoplasm. Taken together, these results indicate that phosphorylation of Ser(523) inhibits the nuclear import function of a nuclear localization sequence, resulting in the accumulation of 5-lipoxygenase enzyme in the cytoplasm. As cytoplasmic localization can be associated with reduced leukotriene synthetic capacity, phosphorylation of Ser(523) serves to inhibit leukotriene production by both impairing catalytic activity and by placing the enzyme in a site that is unfavorable for action.
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Affiliation(s)
- Ming Luo
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, University of Michigan Health System, Ann Arbor, Michigan 48109, USA
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