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Chen SH, Chen CH, Lin HC, Yeh SA, Hwang TL, Chen PJ. Drug repurposing of cyclin-dependent kinase inhibitors for neutrophilic acute respiratory distress syndrome and psoriasis. J Adv Res 2024:S2090-1232(24)00310-2. [PMID: 39089617 DOI: 10.1016/j.jare.2024.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 07/25/2024] [Accepted: 07/26/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND Neutrophilic inflammation, characterized by dysregulated neutrophil activation, triggers a variety of inflammatory responses such as chemotactic infiltration, oxidative bursts, degranulation, neutrophil extracellular traps (NETs) formation, and delayed turnover. This type of inflammation is pivotal in the pathogenesis of acute respiratory distress syndrome (ARDS) and psoriasis. Despite current treatments, managing neutrophil-associated inflammatory symptoms remains a significant challenge. AIM OF REVIEW This review emphasizes the role of cyclin-dependent kinases (CDKs) in neutrophil activation and inflammation. It aims to highlight the therapeutic potential of repurposing CDK inhibitors to manage neutrophilic inflammation, particularly in ARDS and psoriasis. Additionally, it discusses the necessary precautions for the clinical application of these inhibitors due to potential off-target effects and the need for dose optimization. KEY SCIENTIFIC CONCEPTS OF REVIEW CDKs regulate key neutrophilic functions, including chemotactic responses, degranulation, NET formation, and apoptosis. Repurposing CDK inhibitors, originally developed for cancer treatment, shows promise in controlling neutrophilic inflammation. Clinical anticancer drugs, palbociclib and ribociclib, have demonstrated efficacy in treating neutrophilic ARDS and psoriasis by targeting off-label pathways, phosphoinositide 3-kinase (PI3K) and phosphodiesterase 4 (PDE4), respectively. While CDK inhibitors offer promising therapeutic benefits, their clinical repurposing requires careful consideration of off-target effects and dose optimization. Further exploration and clinical trials are necessary to ensure their safety and efficacy in treating inflammatory conditions.
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Affiliation(s)
- Shun-Hua Chen
- School of Nursing, Fooyin University, Kaohsiung 831301, Taiwan.
| | - Chun-Hong Chen
- Department of Medical Research, E-Da Hospital, I-Shou University, Kaohsiung 824410, Taiwan.
| | - Hsin-Chieh Lin
- Department of Chinese Medicine, E-Da Cancer Hospital, I-Shou University, Kaohsiung 824410, Taiwan; School of Chinese Medicine for Post-Baccalaureate, I-Shou University, Kaohsiung 824410, Taiwan.
| | - Shyh-An Yeh
- Medical Physics and Informatics Laboratory of Electronic Engineering and Department of Electronic Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80778, Taiwan; Department of Medical Imaging and Radiological Sciences, I-Shou University, Kaohsiung 824410, Taiwan; Department of Radiation Oncology, E-Da Hospital, I-Shou University, Kaohsiung 824410, Taiwan.
| | - Tsong-Long Hwang
- Research Center for Chinese Herbal Medicine and Graduate Institute of Health Industry Technology, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 333324, Taiwan; Department of Anesthesiology, Chang Gung Memorial Hospital, Taoyuan 33305, Taiwan; Department of Chemical Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan; Graduate Institute of Natural Products, College of Medicine, Chang Gung University, Taoyuan 333324, Taiwan.
| | - Po-Jen Chen
- Department of Medical Research, E-Da Hospital, I-Shou University, Kaohsiung 824410, Taiwan; Graduate Institute of Medicine, College of Medicine, I-Shou University, Kaohsiung 824410, Taiwan.
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Ramoni D, Tirandi A, Montecucco F, Liberale L. Sepsis in elderly patients: the role of neutrophils in pathophysiology and therapy. Intern Emerg Med 2024; 19:901-917. [PMID: 38294676 PMCID: PMC11186952 DOI: 10.1007/s11739-023-03515-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/17/2023] [Indexed: 02/01/2024]
Abstract
Sepsis is among the most important causes of mortality, particularly within the elderly population. Sepsis prevalence is on the rise due to different factors, including increasing average population age and the concomitant rise in the prevalence of frailty and chronic morbidities. Recent investigations have unveiled a "trimodal" trajectory for sepsis-related mortality, with the ultimate zenith occurring from 60 to 90 days until several years after the original insult. This prolonged temporal course ostensibly emanates from the sustained perturbation of immune responses, persevering beyond the phase of clinical convalescence. This phenomenon is particularly associated with the aging immune system, characterized by a broad dysregulation commonly known as "inflammaging." Inflammaging associates with a chronic low-grade activation of the innate immune system preventing an appropriate response to infective agents. Notably, during the initial phases of sepsis, neutrophils-essential in combating pathogens-may exhibit compromised activity. Paradoxically, an overly zealous neutrophilic reaction has been observed to underlie multi-organ dysfunction during the later stages of sepsis. Given this scenario, discovering treatments that can enhance neutrophil activity during the early phases of sepsis while curbing their overactivity in the later phases could prove beneficial in fighting pathogens and reducing the detrimental effects caused by an overactive immune system. This narrative review delves into the potential key role of neutrophils in the pathological process of sepsis, focusing on how the aging process impacts their functions, and highlighting possible targets for developing immune-modulatory therapies. Additionally, the review includes tables that outline the principal potential targets for immunomodulating agents.
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Affiliation(s)
- Davide Ramoni
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 6 Viale Benedetto XV, 16132, Genoa, Italy
| | - Amedeo Tirandi
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 6 Viale Benedetto XV, 16132, Genoa, Italy
| | - Fabrizio Montecucco
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 6 Viale Benedetto XV, 16132, Genoa, Italy
- IRCCS Ospedale Policlinico San Martino Genoa-Italian Cardiovascular Network, Genoa, Italy
| | - Luca Liberale
- First Clinic of Internal Medicine, Department of Internal Medicine, University of Genoa, 6 Viale Benedetto XV, 16132, Genoa, Italy.
- IRCCS Ospedale Policlinico San Martino Genoa-Italian Cardiovascular Network, Genoa, Italy.
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3
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Peterson EA, Sun J, Chen X, Wang J. Neutrophils facilitate the epicardial regenerative response after zebrafish heart injury. Dev Biol 2024; 508:93-106. [PMID: 38286185 PMCID: PMC10923159 DOI: 10.1016/j.ydbio.2024.01.011] [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: 07/29/2023] [Revised: 01/16/2024] [Accepted: 01/22/2024] [Indexed: 01/31/2024]
Abstract
Despite extensive studies on endogenous heart regeneration within the past 20 years, the players involved in initiating early regeneration events are far from clear. Here, we assessed the function of neutrophils, the first-responder cells to tissue damage, during zebrafish heart regeneration. We detected rapid neutrophil mobilization to the injury site after ventricular amputation, peaking at 1-day post-amputation (dpa) and resolving by 3 dpa. Further analyses indicated neutrophil mobilization coincides with peak epicardial cell proliferation, and recruited neutrophils associated with activated, expanding epicardial cells at 1 dpa. Neutrophil depletion inhibited myocardial regeneration and significantly reduced epicardial cell expansion, proliferation, and activation. To explore the molecular mechanism of neutrophils on the epicardial regenerative response, we performed scRNA-seq analysis of 1 dpa neutrophils and identified enrichment of the FGF and MAPK/ERK signaling pathways. Pharmacological inhibition of FGF signaling indicated its' requirement for epicardial expansion, while neutrophil depletion blocked MAPK/ERK signaling activation in epicardial cells. Ligand-receptor analysis indicated the EGF ligand, hbegfa, is released from neutrophils and synergizes with other FGF and MAPK/ERK factors for induction of epicardial regeneration. Altogether, our studies revealed that neutrophils quickly motivate epicardial cells, which later accumulate at the injury site and contribute to heart regeneration.
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Affiliation(s)
- Elizabeth A Peterson
- Division of Cardiology, School of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Jisheng Sun
- Division of Cardiology, School of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Xin Chen
- Division of Cardiology, School of Medicine, Emory University, Atlanta, GA, 30322, USA
| | - Jinhu Wang
- Division of Cardiology, School of Medicine, Emory University, Atlanta, GA, 30322, USA.
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4
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Dobrev D, Heijman J, Hiram R, Li N, Nattel S. Inflammatory signalling in atrial cardiomyocytes: a novel unifying principle in atrial fibrillation pathophysiology. Nat Rev Cardiol 2023; 20:145-167. [PMID: 36109633 PMCID: PMC9477170 DOI: 10.1038/s41569-022-00759-w] [Citation(s) in RCA: 79] [Impact Index Per Article: 79.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/26/2022] [Indexed: 02/08/2023]
Abstract
Inflammation has been implicated in atrial fibrillation (AF), a very common and clinically significant cardiac rhythm disturbance, but its precise role remains poorly understood. Work performed over the past 5 years suggests that atrial cardiomyocytes have inflammatory signalling machinery - in particular, components of the NLRP3 (NACHT-, LRR- and pyrin domain-containing 3) inflammasome - that is activated in animal models and patients with AF. Furthermore, work in animal models suggests that NLRP3 inflammasome activation in atrial cardiomyocytes might be a sufficient and necessary condition for AF occurrence. In this Review, we evaluate the evidence for the role and pathophysiological significance of cardiomyocyte NLRP3 signalling in AF. We first summarize the evidence for a role of inflammation in AF and review the biochemical properties of the NLRP3 inflammasome, as defined primarily in studies of classic inflammation. We then briefly consider the broader evidence for a role of inflammatory signalling in heart disease, particularly conditions that predispose individuals to develop AF. We provide a detailed discussion of the available information about atrial cardiomyocyte NLRP3 inflammasome signalling in AF and related conditions and evaluate the possibility that similar signalling might be important in non-myocyte cardiac cells. We then review the evidence on the role of active resolution of inflammation and its potential importance in suppressing AF-related inflammatory signalling. Finally, we consider the therapeutic potential and broader implications of this new knowledge and highlight crucial questions to be addressed in future research.
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Affiliation(s)
- Dobromir Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Duisburg, Germany
- Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, Montréal, Canada
- Department of Molecular Physiology & Biophysics, Baylor College of Medicine, Houston, TX, USA
| | - Jordi Heijman
- Department of Cardiology, Cardiovascular Research Institute Maastricht, Faculty of Health, Medicine, and Life Sciences, Maastricht University, Maastricht, Netherlands
| | - Roddy Hiram
- Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, Montréal, Canada
| | - Na Li
- Department of Molecular Physiology & Biophysics, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Section of Cardiovascular Research, Baylor College of Medicine, Houston, TX, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
| | - Stanley Nattel
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Duisburg, Germany.
- Department of Medicine and Research Center, Montreal Heart Institute and Université de Montréal, Montréal, Canada.
- IHU LIRYC and Fondation Bordeaux Université, Bordeaux, France.
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada.
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5
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Song C, Li H, Mao Z, Peng L, Liu B, Lin F, Li Y, Dai M, Cui Y, Zhao Y, Han D, Chen L, Huang X, Pan P. Delayed neutrophil apoptosis may enhance NET formation in ARDS. Respir Res 2022; 23:155. [PMID: 35698192 PMCID: PMC9190136 DOI: 10.1186/s12931-022-02065-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 05/26/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Acute respiratory distress syndrome (ARDS) is a neutrophil-associated disease. Delayed neutrophil apoptosis and increased levels of neutrophil extracellular traps (NETs) have been described in ARDS. We aimed to investigate the relationship between these phenomena and their potential as inflammation drivers. We hypothesized that delayed neutrophil apoptosis might enhance NET formation in ARDS. METHOD Our research was carried out in three aspects: clinical research, animal experiments, and in vitro experiments. First, we compared the difference between neutrophil apoptosis and NET levels in healthy controls and patients with ARDS and analyzed the correlation between neutrophil apoptosis and NET levels in ARDS. Then, we conducted animal experiments to verify the effect of neutrophil apoptosis on NET formation in Lipopolysaccharide-induced acute lung injury (LPS-ALI) mice. Furthermore, this study explored the relationship between neutrophil apoptosis and NETs at the cellular level. Apoptosis was assessed using morphological analysis, flow cytometry, and western blotting. NET formation was determined using immunofluorescence, PicoGreen assay, SYTOX Green staining, and western blotting. RESULTS ARDS neutrophils lived longer because of delayed apoptosis, and the cyclin-dependent kinase inhibitor, AT7519, reversed this phenomenon both in ARDS neutrophils and neutrophils in bronchoalveolar lavage fluid (BALF) of LPS-ALI mice. Neutrophils in a medium containing pro-survival factors (LPS or GM-CSF) form more NETs, which can also be reversed by AT7519. Tissue damage can be reduced by promoting neutrophil apoptosis. CONCLUSIONS Neutrophils with extended lifespan in ARDS usually enhance NET formation, which aggravates inflammation. Enhancing neutrophil apoptosis in ARDS can reduce the formation of NETs, inhibit inflammation, and consequently alleviate ARDS.
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Affiliation(s)
- Chao Song
- Infection Control Center, Xiangya Hospital, Central South University, 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Haitao Li
- Cancer Hospital of Hunan Province, Changsha, 410006, Hunan, China
| | - Zhi Mao
- Shenzhen Third People's Hospital of Guangdong Province, Shenzhen, 518114, Guangdong, China
| | - Ling Peng
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Ben Liu
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Fengyu Lin
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yi Li
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Minhui Dai
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yanhui Cui
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Yuhao Zhao
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Duoduo Han
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Lingli Chen
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Xun Huang
- Infection Control Center, Xiangya Hospital, Central South University, 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
| | - Pinhua Pan
- Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China. .,Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China.
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6
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Hiram R. Resolution-promoting autacoids demonstrate promising cardioprotective effects against heart diseases. Mol Biol Rep 2022; 49:5179-5197. [PMID: 35142983 PMCID: PMC9262808 DOI: 10.1007/s11033-022-07230-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 02/03/2022] [Indexed: 12/12/2022]
Abstract
Chronic heart diseases have in common an unresolved inflammatory status. In atherosclerosis, myocarditis, myocardial infarction, or atrial fibrillation, mounting evidence suggests that unresolved inflammation contributes to the chronicity, aggravation, and morbidity of the disease. Following cardiac injury or infection, acute inflammation is a normal and required process to repair damaged tissues or eliminate pathogens and promote restoration of normal functions and structures. However, if acute inflammation is not followed by resolution, a chronic and deleterious inflammatory status may occur, characterized by the persistence of inflammatory biomarkers, promoting aggravation of myocardial pathogenesis, abnormal structural remodeling, development of cardiac fibrosis, and loss of function. Although traditional antiinflammatory strategies, including the use of COX-inhibitors, to inhibit the production of inflammation promotors failed to promote homeostasis, mounting evidence suggests that activation of specific endogenous autacoids may promote resolution and perpetuate cardioprotective effects. The recent discovery of the active mechanism of resolution suggests that proresolving signals and cellular processes may help to terminate inflammation and combat the development of its chronic profile in cardiac diseases. This review discussed (I) the preclinical and clinical evidence of inflammation-resolution in cardiac disorders including atrial fibrillation; (II) how and why many traditional antiinflammatory treatments failed to prevent or cure cardiac inflammation and fibrosis; and (III) whether new therapeutic strategies may interact with the resolution machinery to have cardioprotective effects. RvD D-series resolving, RvE E-series resolving, LXA4 lipoxin A4, MaR1 maresin-1.
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Affiliation(s)
- Roddy Hiram
- Department of Medicine, Faculty of Medicine, Montreal Heart Institute (MHI), Université de Montréal, Research Center, 5000 Belanger, St. Montreal, QC, H1T 1C8, Canada.
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7
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AT7519 against lung cancer via the IL6/STAT3 signaling pathway. Biochem Biophys Res Commun 2022; 609:31-38. [DOI: 10.1016/j.bbrc.2022.03.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 03/27/2022] [Indexed: 11/19/2022]
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8
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Kaveh A, Bruton FA, Oremek MEM, Tucker CS, Taylor JM, Mullins JJ, Rossi AG, Denvir MA. Selective Cdk9 inhibition resolves neutrophilic inflammation and enhances cardiac regeneration in larval zebrafish. Development 2022; 149:272181. [PMID: 34523672 PMCID: PMC8601713 DOI: 10.1242/dev.199636] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 08/20/2021] [Indexed: 11/23/2022]
Abstract
Sustained neutrophilic inflammation is detrimental for cardiac repair and associated with adverse outcomes following myocardial infarction (MI). An attractive therapeutic strategy to treat MI is to reduce or remove infiltrating neutrophils to promote downstream reparative mechanisms. CDK9 inhibitor compounds enhance the resolution of neutrophilic inflammation; however, their effects on cardiac repair/regeneration are unknown. We have devised a cardiac injury model to investigate inflammatory and regenerative responses in larval zebrafish using heartbeat-synchronised light-sheet fluorescence microscopy. We used this model to test two clinically approved CDK9 inhibitors, AT7519 and flavopiridol, examining their effects on neutrophils, macrophages and cardiomyocyte regeneration. We found that AT7519 and flavopiridol resolve neutrophil infiltration by inducing reverse migration from the cardiac lesion. Although continuous exposure to AT7519 or flavopiridol caused adverse phenotypes, transient treatment accelerated neutrophil resolution while avoiding these effects. Transient treatment with AT7519, but not flavopiridol, augmented wound-associated macrophage polarisation, which enhanced macrophage-dependent cardiomyocyte number expansion and the rate of myocardial wound closure. Using cdk9−/− knockout mutants, we showed that AT7519 is a selective CDK9 inhibitor, revealing the potential of such treatments to promote cardiac repair/regeneration. Summary: This study is the first to show that resolving neutrophilic inflammation using a clinically approved immunomodulatory drug (AT7519) improves heart regeneration in zebrafish.
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Affiliation(s)
- Aryan Kaveh
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Finnius A Bruton
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Magdalena E M Oremek
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Carl S Tucker
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | | | - John J Mullins
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Adriano G Rossi
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Martin A Denvir
- Centre for Cardiovascular Science, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
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9
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Filep JG. Targeting Neutrophils for Promoting the Resolution of Inflammation. Front Immunol 2022; 13:866747. [PMID: 35371088 PMCID: PMC8966391 DOI: 10.3389/fimmu.2022.866747] [Citation(s) in RCA: 38] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 02/21/2022] [Indexed: 12/15/2022] Open
Abstract
Acute inflammation is a localized and self-limited innate host-defense mechanism against invading pathogens and tissue injury. Neutrophils, the most abundant immune cells in humans, play pivotal roles in host defense by eradicating invading pathogens and debris. Ideally, elimination of the offending insult prompts repair and return to homeostasis. However, the neutrophils` powerful weaponry to combat microbes can also cause tissue damage and neutrophil-driven inflammation is a unifying mechanism for many diseases. For timely resolution of inflammation, in addition to stopping neutrophil recruitment, emigrated neutrophils need to be disarmed and removed from the affected site. Accumulating evidence documents the phenotypic and functional versatility of neutrophils far beyond their antimicrobial functions. Hence, understanding the receptors that integrate opposing cues and checkpoints that determine the fate of neutrophils in inflamed tissues provides insight into the mechanisms that distinguish protective and dysregulated, excessive inflammation and govern resolution. This review aims to provide a brief overview and update with key points from recent advances on neutrophil heterogeneity, functional versatility and signaling, and discusses challenges and emerging therapeutic approaches that target neutrophils to enhance the resolution of inflammation.
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Affiliation(s)
- János G Filep
- Department of Pathology and Cell Biology, University of Montreal, Montreal, QC, Canada.,Research Center, Maisonneuve-Rosemont Hospital, Montreal, QC, Canada
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10
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McHugh BJ, Stephen J, Robb CT, Fox S, Kipari T, Cartwright JA, Haslett C, Duffin R, Lucas CD, Rossi AG. Inhibition of Cyclin-Dependent Kinase 9 Downregulates Cytokine Production Without Detrimentally Affecting Human Monocyte-Derived Macrophage Viability. Front Cell Dev Biol 2022; 10:905315. [PMID: 35693926 PMCID: PMC9178253 DOI: 10.3389/fcell.2022.905315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 05/03/2022] [Indexed: 12/15/2022] Open
Abstract
Cyclin-dependent kinase (CDK) inhibitor drugs (CDKi), such as R-roscovitine and AT7519, induce neutrophil apoptosis in vitro and enhance the resolution of inflammation in a number of in vivo models. This class of compounds are potential novel therapeutic agents that could promote the resolution of acute and chronic inflammatory conditions where neutrophil activation contributes to tissue damage and aberrant tissue repair. In this study we investigated CDKi effects on macrophage pro-inflammatory mediator production and viability. Treatment of human monocyte-derived macrophages (MDMs) with the CDKi AT7519 and R-roscovitine at concentrations that induce neutrophil apoptosis had no significant effect on control or LPS-activated MDM apoptosis and viability, and did not detrimentally affect MDM efferocytosis of apoptotic cells. In addition, enhanced efferocytosis, induced by the glucocorticoid dexamethasone, was also unaffected after a short time treatment with R-roscovitine. Macrophage cytokine responses to inflammatory stimuli are also of importance during inflammation and resolution. As a key target of CDKi, CDK9, is involved in protein transcription via the RNA polymerase II complex, we investigated the effect of CDKi drugs on cytokine production. Our data show that treatment with AT7519 significantly downregulated expression and release of key MDM cytokines IL-6, TNF, IL-10 and IL-1β, as well as markers of pro-inflammatory macrophage polarisation. R-Roscovitine was also able to downregulate inflammatory cytokine protein secretion from MDMs. Using siRNA transfection, we demonstrate that genetic knock-down of CDK9 replicates these findings, reducing expression and release of pro-inflammatory cytokines. Furthermore, overexpression of CDK9 in THP-1 cells can promote a pro-inflammatory phenotype in these cells, suggesting that CDK9 plays an important role in the inflammatory phenotype of macrophages. Overall, this study demonstrates that pharmacological and genetic targeting of CDK9 inhibits an inflammatory phenotype in human MDMs. As such these data indicate that CDK9 may be key to therapeutically targeting pro-inflammatory macrophage functions during chronic inflammation.
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11
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Yang R, Yang H, Li W, Yue F, Chen H, Hao Y, Hu K. OUP accepted manuscript. J Pharm Pharmacol 2022; 74:1117-1124. [PMID: 35640566 DOI: 10.1093/jpp/rgac035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 04/26/2022] [Indexed: 11/14/2022]
Affiliation(s)
- Ruhao Yang
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, China
| | - Haizhen Yang
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Wenqiang Li
- Department of Emergency, Renmin Hospital of Wuhan University, Wuhan, China
| | - Fang Yue
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Hao Chen
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yueying Hao
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
| | - Ke Hu
- Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China
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12
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Chen H, Yang N, Yang Y, Zheng Y, Xu M, Zhang H, Liu Y, Shen W, Li J. Doxofylline Protects Gram-Negative Pathogens against Antibiotic-Mediated Killing. ACS Infect Dis 2021; 7:3241-3253. [PMID: 34851627 DOI: 10.1021/acsinfecdis.1c00417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Given the growing rate of Gram-negative bacterial infections, antibiotics are now frequently prescribed for various respiratory diseases. Doxofylline is a newer generation xanthine with both bronchodilating and anti-inflammatory activities, but its influence on antibiotics remains poorly understood. Here, we first report the discovery of doxofylline-induced high minimum inhibitory concentrations of antibiotics. We also showed that doxofylline blocked antimicrobial-mediated killing for Gram-negative pathogens in vitro and in murine lung infection models in vivo. By combining efflux pump inhibition tests, gene expression analyses, and using the gene tolC knockout strain, we found that doxofylline positively regulated gene expression of the AcrAB-TolC efflux pump and attenuated the effect of doxofylline on antibacterial activities in ΔtolC mutants. Notably, doxofylline-mediated protection correlated with decreased reactive oxygen species (ROS) production. Collectively, our study indicates that doxofylline protects Gram-negative bacteria from antimicrobial lethality by regulating the AcrAB-TolC efflux pump in a TolC-dependent manner and suppressing antibiotic-induced ROS accumulation. These results suggest caution when using antibiotics alongside doxofylline in clinical treatment.
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Affiliation(s)
- Haoran Chen
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Ning Yang
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Yi Yang
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Yahong Zheng
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Mengran Xu
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Hui Zhang
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Yanyan Liu
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
- Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui 230022, China
- Institute of Bacterial Resistance, Anhui Medical University, Hefei, Anhui 230022, China
| | - Weihua Shen
- Department of Special Clinic, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Jiabin Li
- Department of Infectious Disease, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
- Department of Molecular Biology, Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui 230022, China
- Anhui Center for Surveillance of Bacterial Resistance, Hefei, Anhui 230022, China
- Institute of Bacterial Resistance, Anhui Medical University, Hefei, Anhui 230022, China
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13
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Panigrahy D, Gilligan MM, Serhan CN, Kashfi K. Resolution of inflammation: An organizing principle in biology and medicine. Pharmacol Ther 2021; 227:107879. [PMID: 33915177 DOI: 10.1016/j.pharmthera.2021.107879] [Citation(s) in RCA: 147] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/12/2021] [Indexed: 02/07/2023]
Abstract
The resolution of inflammation has emerged as a critical endogenous process that protects host tissues from prolonged or excessive inflammation that can become chronic. Failure of the resolution of inflammation is a key pathological mechanism that drives the progression of numerous inflammation-driven diseases. Essential polyunsaturated fatty acid (PUFA)-derived autacoid mediators termed 'specialized pro-resolving mediators' (SPMs) regulate endogenous resolution programs by limiting further neutrophil tissue infiltration and stimulating local immune cell (e.g., macrophage)-mediated clearance of apoptotic polymorphonuclear neutrophils, cellular debris, and microbes, as well as counter-regulating eicosanoid/cytokine production. The SPM superfamily encompasses lipoxins, resolvins, protectins, and maresins. Our understanding of the resolution phase of acute inflammation has grown exponentially in the past three decades with the discovery of novel pro-resolving lipid mediators, their pro-efferocytosis mechanisms, and their receptors. Technological advancement has further facilitated lipid mediator metabolipidomic based profiling of healthy and diseased human tissues, highlighting the extraordinary therapeutic potential of SPMs across a broad array of inflammatory diseases including cancer. As current front-line cancer therapies such as surgery, chemotherapy, and radiation may induce various unwanted side effects such as robust pro-inflammatory and pro-tumorigenic host responses, characterizing SPMs and their receptors as novel therapeutic targets may have important implications as a new direction for host-targeted cancer therapy. Here, we discuss the origins of inflammation resolution, key discoveries and the failure of resolution mechanisms in diseases with an emphasis on cancer, and future directions focused on novel therapeutic applications for this exciting and rapidly expanding field.
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Affiliation(s)
- Dipak Panigrahy
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
| | - Molly M Gilligan
- Center for Vascular Biology Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA; Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Khosrow Kashfi
- Department of Molecular, Cellular and Biomedical Sciences, City University of New York, School of Medicine, New York, NY 10031, USA; Graduate Program in Biology, City University of New York Graduate Center, New York, NY 10016, USA
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14
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Singhal A, Kumar S. Neutrophil and remnant clearance in immunity and inflammation. Immunology 2021; 165:22-43. [PMID: 34704249 DOI: 10.1111/imm.13423] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/18/2021] [Accepted: 10/21/2021] [Indexed: 12/13/2022] Open
Abstract
Neutrophil-centred inflammation and flawed clearance of neutrophils cause and exuberate multiple pathological conditions. These most abundant leukocytes exhibit very high daily turnover in steady-state and stress conditions. Various armours including oxidative burst, NETs and proteases function against pathogens, but also dispose neutrophils to spawn pro-inflammatory responses. Neutrophils undergo death through different pathways upon ageing, infection, executing the intruder's elimination. These include non-lytic apoptosis and other lytic deaths including NETosis, necroptosis and pyroptosis with distinct disintegration of the cellular membrane. This causes release and presence of different intracellular cytotoxic, and tissue-damaging content as cell remnants in the extracellular environment. The apoptotic cells and apoptotic bodies get cleared with non-inflammatory outcomes, while lytic deaths associated remnants including histones and cell-free DNA cause pro-inflammatory responses. Indeed, the enhanced frequencies of neutrophil-associated proteases, cell-free DNA and autoantibodies in diverse pathologies including sepsis, asthma, lupus and rheumatoid arthritis, imply disturbed neutrophil resolution programmes in inflammatory and autoimmune diseases. Thus, the clearance mechanisms of neutrophils and associated remnants are vital for therapeutics. Though studies focused on clearance mechanisms of senescent or apoptotic neutrophils so far generated a good understanding of the same, clearance of neutrophils undergoing distinct lytic deaths, including NETs, are being the subjects of intense investigations. Here, in this review, we are providing the current updates in the clearance mechanisms of apoptotic neutrophils and focusing on not so well-defined recognition, uptake and degradation of neutrophils undergoing lytic death and associated remnants that may provide new therapeutic approaches in inflammation and autoimmunity.
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Affiliation(s)
- Apurwa Singhal
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Sachin Kumar
- Pharmacology Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India.,Academy of Scientific and Innovative Research (AcSIR), Postal Staff College Area, Ghaziabad, Uttar Pradesh, India
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15
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Widden H, Placzek WJ. The multiple mechanisms of MCL1 in the regulation of cell fate. Commun Biol 2021; 4:1029. [PMID: 34475520 PMCID: PMC8413315 DOI: 10.1038/s42003-021-02564-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/16/2021] [Indexed: 01/11/2023] Open
Abstract
MCL1 (myeloid cell leukemia-1) is a widely recognized pro-survival member of the Bcl-2 (B-cell lymphoma protein 2) family and a promising target for cancer therapy. While the role MCL1 plays in apoptosis is well defined, its participation in emerging non-apoptotic signaling pathways is only beginning to be appreciated. Here, we synthesize studies characterizing MCL1s influence on cell proliferation, DNA damage response, autophagy, calcium handling, and mitochondrial quality control to highlight the broader scope that MCL1 plays in cellular homeostasis regulation. Throughout this review, we discuss which pathways are likely to be impacted by emerging MCL1 inhibitors, as well as highlight non-cancerous disease states that could deploy Bcl-2 homology 3 (BH3)-mimetics in the future. In this review Widden and Placzek synthesize studies characterizing the influence that myeloid cell leukemia-1 (MCL1) has on cell proliferation, DNA damage response, autophagy, calcium handling, and mitochondrial quality control to highlight the broader scope that it plays in cellular homeostasis regulation. They discuss which pathways are likely to be impacted by emerging MCL1 inhibitors, as well as highlight non-cancerous disease states that could deploy BH3-mimetics in the future.
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Affiliation(s)
- Hayley Widden
- Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
| | - William J Placzek
- Department of Biochemistry and Molecular Genetics, University of Alabama at Birmingham, Birmingham, AL, USA.
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16
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Keewan E, Beg S, Naser SA. Anti-TNF-α agents Modulate SARS-CoV-2 Receptors and Increase the Risk of Infection Through Notch-1 Signaling. Front Immunol 2021; 12:641295. [PMID: 34025650 PMCID: PMC8134694 DOI: 10.3389/fimmu.2021.641295] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 04/22/2021] [Indexed: 12/16/2022] Open
Abstract
Although millions of patients with underlining conditions are treated primarily with anti-TNF-α agents, little is known about the safety of this standard therapy during the coronavirus disease-2019 (COVID-19) pandemic. In this study, we investigated the effect of anti-TNF-α monoclonal antibodies on the cellular entry mechanism of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and increasing the risk of COVID-19 development. We focused on the expression of angiotensin-converting enzyme II (ACE2), type II transmembrane serine proteases (TMPRSS2)/TNF-α converting enzyme (TACE) ratio. We also investigated the involvement of Notch-1 signaling and its downstream influence on IL-6, myeloid cell leukemia sequence-1(MCL-1) in the anti-TNF-α mode of action and increased the susceptibility to Mycobacterium avium subspecies paratuberculosis (MAP) infection. Surprisingly, anti-TNF-α downregulated ACE2 expression by 0.46-fold and increased TMPRSS2/TACE ratio by 44% in THP-1 macrophages. Treatment of macrophages with rIL-6 also downregulated ACE2 and increased TMPRSS2/TACE ratio by 54%. Interestingly, anti-TNF-α treatment upregulated Notch-1, IL-6, and MCL-1 by 1.3, 1.2, and 1.9-fold, respectively, and increased viability and burden of MAP infection in macrophages. Blocking Notch signaling doubled ACE2 expression, decreased TMPRSS2/TACE ratio by 38%, and reduced MAP viability by 56%. In a small group of patients, ACE2 level was significantly lower in the plasma from rheumatoid arthritis (RA) patients on anti-TNF-α treatment compared to healthy control. The data in this critical study demonstrated that through Notch-1/IL-6 signaling, anti-TNF-α agents decreased ACE2 expression and shedding through TMPRSS2/TACE modulation and increased the susceptibility to infection. Overall, this study warns against anti-TNF-α therapy in some patients with underlining inflammatory conditions during the COVID-19 pandemic. The findings should impact current guidelines regarding treatment decisions of patients on anti-TNF-α during the COVID-19 pandemic.
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Affiliation(s)
- Esra'a Keewan
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Shazia Beg
- UCF Health, College of Medicine, University of Central Florida, Orlando, FL, United States
| | - Saleh A Naser
- Division of Molecular Microbiology, Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, FL, United States
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17
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Zhang W, Piao L, Liu X. Chlorogenic acid suppresses neutrophil recruitment to tumors by inducing apoptosis and reverse migration. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.104216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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18
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Schmitz Nunes V, Rogério AP, Abrahão O. Insights into the Activation Mechanism of the ALX/FPR2 Receptor. J Phys Chem Lett 2020; 11:8952-8957. [PMID: 33030905 DOI: 10.1021/acs.jpclett.0c02052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The formyl peptide receptor 2 (ALX/FPR2), a G-protein-coupled receptor (GPCR), plays an important role in host defense and inflammation. This receptor can be driven as pro- or anti-inflammatory depending on its agonist, such as N-formyl-Met-Leu-Phe-Lys (fMLFK) and resolvin D1 (RvD1) or its aspirin-triggered 17 (R)-epimer, AT-RvD1, respectively. However, the activation mechanism of ALX/FPR2 by pro- and anti-inflammatory agonists remains unclear. In this work, on the basis of molecular dynamics simulations, we evaluated a model of the ALX/FPR2 receptor activation process using two agonists, fMLFK and AT-RvD1, with opposite effects. The simulations by both fMLFK and AT-RvD1 induced the ALX/FPR2 activation through a set of receptor-core residues, in particular, R205, Q258, and W254. In addition, the activation was dependent on the disruption of electrostatic interactions in the cytoplasmic region of the receptor. We also found that in the AT-RvD1 simulations, the position of the H8 helix was similar to that of the same helix in other class-A GPCRs coupled to arrestin. Thus our results shed light on the mechanism of activation of the ALX/FPR2 receptor by pro-inflammatory and pro-resolution agonists.
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Affiliation(s)
- Vinicius Schmitz Nunes
- Laboratório de Química Computacional Medicinal, UFTM, Uberaba, Minas Gerais 38015-050, Brazil
- Programa de Pós-Graduação em Modelagem Computacional, UFJF, Juiz de Fora, Minas Gerais 36036-330, Brazil
| | - Alexandre P Rogério
- Laboratório de Imunofarmacologia Experimental, UFTM, Uberaba, Minas Gerais 38025-180, Brazil
| | - Odonírio Abrahão
- Laboratório de Química Computacional Medicinal, UFTM, Uberaba, Minas Gerais 38015-050, Brazil
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19
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Macfarlane JG, Dorward DA, Ruchaud-Sparagano MH, Scott J, Lucas CD, Rossi AG, Simpson AJ. Src kinase inhibition with dasatinib impairs neutrophil function and clearance of Escherichia coli infection in a murine model of acute lung injury. J Inflamm (Lond) 2020; 17:34. [PMID: 33292269 PMCID: PMC7597020 DOI: 10.1186/s12950-020-00261-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/30/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Neutrophils rapidly respond to and clear infection from tissues, but can also induce tissue damage through excessive degranulation, when acute inflammation proceeds unchecked. A number of key neutrophil functions, including adhesion-dependent degranulation, are controlled by src family kinases. Dasatinib is a potent src inhibitor used in treating patients with chronic myeloid leukaemia and treatment-resistant acute lymphoblastic leukaemia. We hypothesized that dasatinib would attenuate acute inflammation by inhibiting neutrophil recruitment, degranulation and endothelial cell injury, without impairing bacterial clearance, in a murine model of bacteria-induced acute lung injury. C57BL/6 mice received intratracheal Escherichia coli, and were treated with intraperitoneal dasatinib or control. Bacterial clearance, lung injury, and markers of neutrophil recruitment and degranulation were measured. Separately, human blood neutrophils were exposed to dasatinib or control, and the effects on a range of neutrophil functions assessed. RESULTS Dasatinib was associated with a dose-dependent significant increase in E. coli in the mouse lung, accompanied by impairment of organ function, reflected in significantly increased protein leak across the alveolar-capillary membrane. However, the number of neutrophils entering the lung was unaffected, suggesting that dasatinib impairs neutrophil function independent of migration. Dasatinib did not cause direct toxicity to human neutrophils, but led to significant reductions in phagocytosis of E. coli, adhesion, chemotaxis, generation of superoxide anion and degranulation of primary and secondary granules. However, no biologically important effect of dasatinib on neutrophil degranulation was observed in mice. CONCLUSIONS Contrary to our starting hypothesis, src kinase inhibition with dasatinib had a detrimental effect on bacterial clearance in the mouse lung and therefore does not represent an attractive therapeutic strategy to treat primary infective lung inflammation. Data from human neutrophils suggest that dasatanib has inhibitory effects on a range of neutrophil functions.
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Affiliation(s)
- James G Macfarlane
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
| | - David A Dorward
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | | | - Jonathan Scott
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
| | - Christopher D Lucas
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - Adriano G Rossi
- Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, EH16 4TJ, UK
| | - A John Simpson
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK
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20
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Barth ND, Subiros-Funosas R, Mendive-Tapia L, Duffin R, Shields MA, Cartwright JA, Henriques ST, Sot J, Goñi FM, Lavilla R, Marwick JA, Vermeren S, Rossi AG, Egeblad M, Dransfield I, Vendrell M. A fluorogenic cyclic peptide for imaging and quantification of drug-induced apoptosis. Nat Commun 2020; 11:4027. [PMID: 32788676 PMCID: PMC7423924 DOI: 10.1038/s41467-020-17772-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 07/17/2020] [Indexed: 02/06/2023] Open
Abstract
Programmed cell death or apoptosis is a central biological process that is dysregulated in many diseases, including inflammatory conditions and cancer. The detection and quantification of apoptotic cells in vivo is hampered by the need for fixatives or washing steps for non-fluorogenic reagents, and by the low levels of free calcium in diseased tissues that restrict the use of annexins. In this manuscript, we report the rational design of a highly stable fluorogenic peptide (termed Apo-15) that selectively stains apoptotic cells in vitro and in vivo in a calcium-independent manner and under wash-free conditions. Furthermore, using a combination of chemical and biophysical methods, we identify phosphatidylserine as a molecular target of Apo-15. We demonstrate that Apo-15 can be used for the quantification and imaging of drug-induced apoptosis in preclinical mouse models, thus creating opportunities for assessing the in vivo efficacy of anti-inflammatory and anti-cancer therapeutics. Programmed cell death or apoptosis is an essential biological process that is impaired in some diseases and can be used to assess the effectiveness of drugs. Here the authors design Apo-15 as a fluorogenic peptide for the detection and real-time imaging of apoptotic cells.
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Affiliation(s)
- Nicole D Barth
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | | | - Lorena Mendive-Tapia
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | - Rodger Duffin
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | - Mario A Shields
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA
| | | | - Sónia Troeira Henriques
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, 4072, Australia.,School of Biomedical Sciences, Queensland University of Technology, Translational Research Institute, Brisbane, QLD, 4102, Australia
| | - Jesus Sot
- Instituto Biofisika (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Campus de Leioa, 48940, Leioa, Spain
| | - Felix M Goñi
- Instituto Biofisika (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Campus de Leioa, 48940, Leioa, Spain
| | - Rodolfo Lavilla
- Laboratory of Medicinal Chemistry and Institute of Biomedicine U. Barcelona (IBUB), Faculty of Pharmacy, University of Barcelona, 08028, Barcelona, Spain
| | - John A Marwick
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | - Sonja Vermeren
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | - Adriano G Rossi
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK
| | - Mikala Egeblad
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA
| | - Ian Dransfield
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK.
| | - Marc Vendrell
- Centre for Inflammation Research, University of Edinburgh, EH16 4TJ, Edinburgh, UK.
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21
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Felton JM, Dorward DA, Cartwright JA, Potey PM, Robb CT, Gui J, Craig RW, Schwarze J, Haslett C, Duffin R, Dransfield I, Lucas CD, Rossi AG. Mcl-1 protects eosinophils from apoptosis and exacerbates allergic airway inflammation. Thorax 2020; 75:600-605. [PMID: 32303624 PMCID: PMC7361019 DOI: 10.1136/thoraxjnl-2019-213204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/24/2020] [Accepted: 03/27/2020] [Indexed: 11/10/2022]
Abstract
Eosinophils are key effector cells in allergic diseases. Here we investigated Mcl-1 (an anti-apoptotic protein) in experimental allergic airway inflammation using transgenic overexpressing human Mcl-1 mice (hMcl-1) and reducing Mcl-1 by a cyclin-dependent kinase inhibitor. Overexpression of Mcl-1 exacerbated allergic airway inflammation, with increased bronchoalveolar lavage fluid cellularity, eosinophil numbers and total protein, and an increase in airway mucus production. Eosinophil apoptosis was suppressed by Mcl-1 overexpression, with this resistance to apoptosis attenuated by cyclin-dependent kinase inhibition which also rescued Mcl-1-exacerbated allergic airway inflammation. We propose that targeting Mcl-1 may be beneficial in treatment of allergic airway disease.
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Affiliation(s)
- Jennifer M Felton
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK.,Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Centre, Cincinnati, Ohio, USA
| | - David A Dorward
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Jennifer A Cartwright
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Philippe Md Potey
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Calum T Robb
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Jingang Gui
- Department of Pharmacology and Toxicology, Dartmouth College Geisel School of Medicine, Hanover, New Hampshire, USA
| | - Ruth W Craig
- Department of Pharmacology and Toxicology, Dartmouth College Geisel School of Medicine, Hanover, New Hampshire, USA
| | - Jürgen Schwarze
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Christopher Haslett
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Rodger Duffin
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Ian Dransfield
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Christopher D Lucas
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
| | - Adriano G Rossi
- University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, Edinburgh BioQuarter, UK
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22
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Interpreting an apoptotic corpse as anti-inflammatory involves a chloride sensing pathway. Nat Cell Biol 2019; 21:1532-1543. [PMID: 31792382 PMCID: PMC7140761 DOI: 10.1038/s41556-019-0431-1] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Apoptotic cell clearance (efferocytosis) elicits an anti-inflammatory response by phagocytes, but the mechanisms that underlie this response are still being defined. Here, we uncover a chloride-sensing signalling pathway that controls both the phagocyte 'appetite' and its anti-inflammatory response. Efferocytosis transcriptionally altered the genes that encode the solute carrier (SLC) proteins SLC12A2 and SLC12A4. Interfering with SLC12A2 expression or function resulted in a significant increase in apoptotic corpse uptake per phagocyte, whereas the loss of SLC12A4 inhibited corpse uptake. In SLC12A2-deficient phagocytes, the canonical anti-inflammatory program was replaced by pro-inflammatory and oxidative-stress-associated gene programs. This 'switch' to pro-inflammatory sensing of apoptotic cells resulted from the disruption of the chloride-sensing pathway (and not due to corpse overload or poor degradation), including the chloride-sensing kinases WNK1, OSR1 and SPAK-which function upstream of SLC12A2-had a similar effect on efferocytosis. Collectively, the WNK1-OSR1-SPAK-SLC12A2/SLC12A4 chloride-sensing pathway and chloride flux in phagocytes are key modifiers of the manner in which phagocytes interpret the engulfed apoptotic corpse.
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23
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Cao C, Yu M, Chai Y. Pathological alteration and therapeutic implications of sepsis-induced immune cell apoptosis. Cell Death Dis 2019; 10:782. [PMID: 31611560 PMCID: PMC6791888 DOI: 10.1038/s41419-019-2015-1] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/28/2019] [Accepted: 09/02/2019] [Indexed: 02/07/2023]
Abstract
Sepsis is a life-threatening organ dysfunction syndrome caused by dysregulated host response to infection that leads to uncontrolled inflammatory response followed by immunosuppression. However, despite the high mortality rate, no specific treatment modality or drugs with high efficacy is available for sepsis to date. Although improved treatment strategies have increased the survival rate during the initial state of excessive inflammatory response, recent trends in sepsis show that mortality occurs at a period of continuous immunosuppressive state in which patients succumb to secondary infections within a few weeks or months due to post-sepsis “immune paralysis.” Immune cell alteration induced by uncontrolled apoptosis has been considered a major cause of significant immunosuppression. Particularly, apoptosis of lymphocytes, including innate immune cells and adaptive immune cells, is associated with a higher risk of secondary infections and poor outcomes. Multiple postmortem studies have confirmed that sepsis-induced immune cell apoptosis occurs in all age groups, including neonates, pediatric, and adult patients, and it is considered to be a primary contributing factor to the immunosuppressive pathophysiology of sepsis. Therapeutic perspectives targeting apoptosis through various strategies could improve survival in sepsis. In this review article, we will focus on describing the major apoptosis process of immune cells with respect to physiologic and molecular mechanisms. Further, advances in apoptosis-targeted treatment modalities for sepsis will also be discussed.
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Affiliation(s)
- Chao Cao
- Tianjin Medical University General Hospital, Tianjin, China.,Tianjin Medical University, Tianjin, China.,Department of Internal Medicine, The University of Iowa Carver College of Medicine, Iowa City, IA, USA
| | - Muming Yu
- Tianjin Medical University General Hospital, Tianjin, China
| | - Yanfen Chai
- Tianjin Medical University General Hospital, Tianjin, China. .,Tianjin Medical University, Tianjin, China.
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24
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McCormick B, Craig HE, Chu JY, Carlin LM, Canel M, Wollweber F, Toivakka M, Michael M, Astier AL, Norton L, Lilja J, Felton JM, Sasaki T, Ivaska J, Hers I, Dransfield I, Rossi AG, Vermeren S. A Negative Feedback Loop Regulates Integrin Inactivation and Promotes Neutrophil Recruitment to Inflammatory Sites. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2019; 203:1579-1588. [PMID: 31427445 PMCID: PMC6731454 DOI: 10.4049/jimmunol.1900443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/16/2019] [Indexed: 01/08/2023]
Abstract
Neutrophils are abundant circulating leukocytes that are rapidly recruited to sites of inflammation in an integrin-dependent fashion. Contrasting with the well-characterized regulation of integrin activation, mechanisms regulating integrin inactivation remain largely obscure. Using mouse neutrophils, we demonstrate in this study that the GTPase activating protein ARAP3 is a critical regulator of integrin inactivation; experiments with Chinese hamster ovary cells indicate that this is not restricted to neutrophils. Specifically, ARAP3 acts in a negative feedback loop downstream of PI3K to regulate integrin inactivation. Integrin ligand binding drives the activation of PI3K and of its effectors, including ARAP3, by outside-in signaling. ARAP3, in turn, promotes localized integrin inactivation by negative inside-out signaling. This negative feedback loop reduces integrin-mediated PI3K activity, with ARAP3 effectively switching off its own activator, while promoting turnover of substrate adhesions. In vitro, ARAP3-deficient neutrophils display defective PIP3 polarization, adhesion turnover, and transendothelial migration. In vivo, ARAP3-deficient neutrophils are characterized by a neutrophil-autonomous recruitment defect to sites of inflammation.
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Affiliation(s)
- Barry McCormick
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Helen E Craig
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom
| | - Julia Y Chu
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Leo M Carlin
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, United Kingdom
- Institute of Cancer Sciences, University of Glasgow, Glasgow G61 1BD, United Kingdom
| | - Marta Canel
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Florian Wollweber
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Matilda Toivakka
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Melina Michael
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Anne L Astier
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
- Centre de Physiopathologie Toulouse-Purpan, INSERM U1043, CNRS U5282, Université Toulouse, 31024 Toulouse Cedex 3, France
| | - Laura Norton
- Babraham Institute, Babraham Research Campus, Cambridge CB22 3AT, United Kingdom
| | - Johanna Lilja
- Turku Centre for Biotechnology, University of Turku, FI-20520 Turku, Finland
| | - Jennifer M Felton
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Takehiko Sasaki
- Department of Biochemical Pathophysiology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan; and
| | - Johanna Ivaska
- Centre de Physiopathologie Toulouse-Purpan, INSERM U1043, CNRS U5282, Université Toulouse, 31024 Toulouse Cedex 3, France
| | - Ingeborg Hers
- School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol BS8 1TD, United Kingdom
| | - Ian Dransfield
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Adriano G Rossi
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Sonja Vermeren
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom;
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Flak MB, Colas RA, Muñoz-Atienza E, Curtis MA, Dalli J, Pitzalis C. Inflammatory arthritis disrupts gut resolution mechanisms, promoting barrier breakdown by Porphyromonas gingivalis. JCI Insight 2019; 4:125191. [PMID: 31292292 PMCID: PMC6629160 DOI: 10.1172/jci.insight.125191] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 05/22/2019] [Indexed: 12/11/2022] Open
Abstract
Rheumatoid arthritis is linked with altered host immune responses and severe joint destruction. Recent evidence suggests that loss of gut homeostasis and barrier breach by pathobionts, including Porphyromonas gingivalis, may influence disease severity. The mechanism(s) leading to altered gut homeostasis and barrier breakdown in inflammatory arthritis are poorly understood. In the present study, we found a significant reduction in intestinal concentrations of several proresolving mediators during inflammatory arthritis, including downregulation of the gut-protective mediator resolvin D5n-3 DPA (RvD5n-3 DPA). This was linked with increased metabolism of RvD5n-3 DPA to its inactive 17-oxo metabolite. We also found downregulation of IL-10 expression in the gut of arthritic mice that was coupled with a reduction in IL-10 and IL-10 receptor (IL-10R) in lamina propria macrophages. These changes were linked with a decrease in the number of mucus-producing goblet cells and tight junction molecule expression in the intestinal epithelium of arthritic mice when compared with naive mice. P. gingivalis inoculation further downregulated intestinal RvD5n-3 DPA and Il-10 levels and the expression of gut tight junction proteins. RvD5n-3 DPA, but not its metabolite 17-oxo-RvD5n-3 DPA, increased the expression of both IL-10 and IL-10R in macrophages via the upregulation of the aryl hydrocarbon receptor agonist l-kynurenine. Administration of RvD5n-3 DPA to arthritic P. gingivalis-inoculated mice increased intestinal Il-10 expression, restored gut barrier function, and reduced joint inflammation. Together, these findings uncover mechanisms in the pathogenesis of rheumatoid arthritis, where disruption of the gut RvD5n-3 DPA-IL-10 axis weakens the gut barrier, which becomes permissive to the pathogenic actions of the pathobiont P. gingivalis.
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Affiliation(s)
- Magdalena B. Flak
- Centre for Experimental Medicine & Rheumatology, William Harvey Research Institute, Queen Mary University of London (QMUL), London, United Kingdom
| | - Romain A. Colas
- Lipid Mediator Unit, William Harvey Research Institute, QMUL, London, United Kingdom
| | - Estefanía Muñoz-Atienza
- Centre for Experimental Medicine & Rheumatology, William Harvey Research Institute, Queen Mary University of London (QMUL), London, United Kingdom
| | | | - Jesmond Dalli
- Lipid Mediator Unit, William Harvey Research Institute, QMUL, London, United Kingdom
- Centre for Inflammation and Therapeutic Innovation, QMUL, London, United Kingdom
| | - Costantino Pitzalis
- Centre for Experimental Medicine & Rheumatology, William Harvey Research Institute, Queen Mary University of London (QMUL), London, United Kingdom
- Centre for Inflammation and Therapeutic Innovation, QMUL, London, United Kingdom
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26
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Cartwright JA, Lucas CD, Rossi AG. Inflammation Resolution and the Induction of Granulocyte Apoptosis by Cyclin-Dependent Kinase Inhibitor Drugs. Front Pharmacol 2019; 10:55. [PMID: 30886578 PMCID: PMC6389705 DOI: 10.3389/fphar.2019.00055] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 01/18/2019] [Indexed: 12/14/2022] Open
Abstract
Inflammation is a necessary dynamic tissue response to injury or infection and it's resolution is essential to return tissue homeostasis and function. Defective or dysregulated inflammation resolution contributes significantly to the pathogenesis of many, often common and challenging to treat human conditions. The transition of inflammation to resolution is an active process, involving the clearance of inflammatory cells (granulocytes), a change of mediators and their receptors, and prevention of further inflammatory cell infiltration. This review focuses on the use of cyclin dependent kinase inhibitor drugs to pharmacologically target this inflammatory resolution switch, specifically through inducing granulocyte apoptosis and phagocytic clearance of apoptotic cells (efferocytosis). The key processes and pathways required for granulocyte apoptosis, recruitment of phagocytes and mechanisms of engulfment are discussed along with the cumulating evidence for cyclin dependent kinase inhibitor drugs as pro-resolution therapeutics.
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Affiliation(s)
- Jennifer A. Cartwright
- Queen's Medical Research Institute, University of Edinburgh Centre for Inflammation Research, Edinburgh BioQuarter, Edinburgh, United Kingdom
- MRC Centre for Regenerative Medicine, University of Edinburgh, Edinburgh BioQuarter, Edinburgh, United Kingdom
| | - Christopher D. Lucas
- Queen's Medical Research Institute, University of Edinburgh Centre for Inflammation Research, Edinburgh BioQuarter, Edinburgh, United Kingdom
| | - Adriano G. Rossi
- Queen's Medical Research Institute, University of Edinburgh Centre for Inflammation Research, Edinburgh BioQuarter, Edinburgh, United Kingdom
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27
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Potey PM, Rossi AG, Lucas CD, Dorward DA. Neutrophils in the initiation and resolution of acute pulmonary inflammation: understanding biological function and therapeutic potential. J Pathol 2019; 247:672-685. [PMID: 30570146 PMCID: PMC6492013 DOI: 10.1002/path.5221] [Citation(s) in RCA: 139] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/12/2018] [Accepted: 12/17/2018] [Indexed: 12/13/2022]
Abstract
Acute respiratory distress syndrome (ARDS) is the often fatal sequelae of a broad range of precipitating conditions. Despite decades of intensive research and clinical trials there remain no therapies in routine clinical practice that target the dysregulated and overwhelming inflammatory response that characterises ARDS. Neutrophils play a central role in the initiation, propagation and resolution of this complex inflammatory environment by migrating into the lung and executing a variety of pro-inflammatory functions. These include degranulation with liberation of bactericidal proteins, release of cytokines and reactive oxygen species as well as production of neutrophil extracellular traps. Although these functions are advantageous in clearing bacterial infection, the consequence of associated tissue damage, the contribution to worsening acute inflammation and prolonged neutrophil lifespan at sites of inflammation are deleterious. In this review, the importance of the neutrophil will be considered, together with discussion of recent advances in understanding neutrophil function and the factors that influence them throughout the phases of inflammation in ARDS. From a better understanding of neutrophils in this context, potential therapeutic targets are identified and discussed. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Philippe Md Potey
- The University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- The University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Christopher D Lucas
- The University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - David A Dorward
- The University of Edinburgh Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
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Song W, Tan H, Wang S, Zhang Y, Ding Y. Association of High Mobility Group Box Protein B1 Gene Polymorphisms with Pneumonia Susceptibility and Severity. Genet Test Mol Biomarkers 2018; 23:3-11. [PMID: 30562142 DOI: 10.1089/gtmb.2018.0174] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVE To investigate the relationship between the high mobility group box protein B1 (HMGB1) single nucleotide polymorphisms (SNPs) rs1412125, rs2249825, and rs1045411 with pneumonia in terms of susceptibility, severity, and inflammatory response. METHODS The genotypes of HMGB1 rs1412125 (-1615T > C), rs2249825 (3814C > G), and rs1045411 (2262C > T) loci in 328 patients with community-acquired pneumonia (CAP) and 317 healthy subjects were analyzed by Sanger sequencing. The expression and secretion of the inflammatory cytokines HMGB1, interleukin (IL)-10, tumor necrosis factor-alpha (TNF-α), and IL-6 were determined after lipopolysaccharide (LPS) stimulation of peripheral whole blood cells. RESULTS The risk of CAP was higher in carriers of the mutant HMGB1 rs1412125 and rs2249825 alleles than those that had the wild type alleles (adjusted odds ratio [OR] = 1.241; 95% confidence interval [CI] = 1.061-1.448; p = 0.007; adjusted OR = 1.225; 95% CI = 1.038-1.427; p = 0.016, respectively). Moreover, the mutation-carrying patients with CAP were more likely to develop severe community-acquired pneumonia (SCAP). There was no correlation between the HMGB1 rs1045411 SNP alleles and CAP or SCAP (p > 0.05). The expression and secretion of the inflammatory cytokines HMGB1, IL-10, TNF-α, and IL-6 was significantly higher in LPS-stimulated peripheral blood among patients with mutations at the rs1412125 and rs2249825 loci compared with those with wild type alleles (p < 0.05). The 30-day mortality rates for CAP patients with mutations at the rs1412125 and rs2249825 loci of HMGB1 were significantly higher than those that had wild type alleles. The mortality rate difference between rs1045411 wild-type CAP patients and mutant was not significant (p = 0.789). CONCLUSION SNPs at the rs1412125 and rs2249825 loci of HMGB1 are associated with pneumonia in terms of susceptibility, severity, and inflammatory response.
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Affiliation(s)
- Weiwei Song
- 1 Department of Critical Care Medicine, Zibo Central Hospital, Zibo, China
| | - Haibo Tan
- 1 Department of Critical Care Medicine, Zibo Central Hospital, Zibo, China
| | - Shifu Wang
- 1 Department of Critical Care Medicine, Zibo Central Hospital, Zibo, China
| | - Yun Zhang
- 1 Department of Critical Care Medicine, Zibo Central Hospital, Zibo, China
| | - Yueping Ding
- 2 Department of Intensive Care Unit, The Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
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29
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LncRNA PMS2L2 protects ATDC5 chondrocytes against lipopolysaccharide-induced inflammatory injury by sponging miR-203. Life Sci 2018; 217:283-292. [PMID: 30550887 DOI: 10.1016/j.lfs.2018.12.020] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/11/2018] [Accepted: 12/11/2018] [Indexed: 02/06/2023]
Abstract
AIMS PMS1 Homolog 2, Mismatch Repair System Component Pseudogene 2 (PMS2L2) has been reported as an up-regulated long non-coding RNA (lncRNA) in osteoarthritis (OA) tissues. The purpose of the present work is to explore whether the differently expressed PMS2L2 is associated with the pathogenesis of OA. MAIN METHODS Chondrogenic ATDC5 cells were exposed to various doses of lipopolysaccharide (LPS). The expression of PMS2L2, miR-203, and MCL-1 in cell was altered by transfection. Thereafter, cell viability, apoptosis, the expression changes of apoptosis-related factors and the release of pro-inflammatory factors were respectively assessed. Moreover, the regulatory relationship between PMS2L2 and miR-203, as well as between miR-203 and MCL-1 were studied. KEY FINDINGS PMS2L2 expression was down-regulated following LPS stimulation. PMS2L2 protected ATDC5 cells against LPS-induced injury by increasing cell viability, decreasing apoptosis, and repressing the release of pro-inflammatory factors. Meanwhile, PMS2L2 increased the expression levels of COL2A1 and ACAN, while down-regulated the expression levels of MMP13 and ADAMTS-5. PMS2L2 worked as a molecular sponge for miR-203. Besides, miR-203 overexpression partially abolished the chondroprotective effects of PMS2L2. MCL-1 was a direct target of miR-203, and it exerted the similarly chondroprotective effects as PMS2L2. Furthermore, PMS2L2 and MCL-1 blocked Wnt/β-Catenin and JAK/STAT signaling pathways also via a miR-203-dependent manner. SIGNIFICANCE Our study reveals a protective role of PMS2L2 in LPS-induced inflammatory injury in chondrocytes. PMS2L2/miR-203/MCL-1 axis may serve as a new gene therapy strategy for the treatment of OA.
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30
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Serhan CN, Chiang N, Dalli J. New pro-resolving n-3 mediators bridge resolution of infectious inflammation to tissue regeneration. Mol Aspects Med 2018; 64:1-17. [PMID: 28802833 PMCID: PMC5832503 DOI: 10.1016/j.mam.2017.08.002] [Citation(s) in RCA: 173] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 08/07/2017] [Indexed: 12/16/2022]
Abstract
While protective, the acute inflammatory response when uncontrolled can lead to further tissue damage and chronic inflammation that is now widely recognized to play important roles in many commonly occurring diseases, such as cardiovascular disease, neurodegenerative diseases, metabolic syndrome, and many other diseases of significant public health concern. The ideal response to initial challenges of the host is complete resolution of the acute inflammatory response, which is now recognized to be a biosynthetically active process governed by specialized pro-resolving mediators (SPM). These chemically distinct families include lipoxins, resolvins, protectins and maresins that are biosynthesized from essential fatty acids. The biosynthesis and complete stereochemical assignments of the major SPM are established, and new profiling procedures have recently been introduced to document the activation of these pathways in vivo with isolated cells and in human tissues. The active resolution phase leads to tissue regeneration, where we've recently identified new molecules that communicate during resolution of inflammation to activate tissue regeneration in model organisms. This review presents an update on the documentation of the roles of SPMs and the biosynthesis and structural elucidation of novel mediators that stimulate tissue regeneration, coined conjugates in tissue regeneration. The identification and actions of the three families, maresin conjugates in tissue regeneration (MCTR), protectin conjugates in tissue regeneration (PCTR), and resolvin conjugates in tissue regeneration (RCTR), are reviewed here. The identification, structural elucidation and the pathways and biosynthesis of these new mediators in tissue regeneration demonstrate the host capacity to protect from collateral tissue damage, stimulate clearance of bacteria and debris, and promote tissue regeneration via endogenous pathways and molecules in the resolution metabolome.
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Affiliation(s)
- Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
| | - Nan Chiang
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Jesmond Dalli
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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31
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Felton JM, Duffin R, Robb CT, Crittenden S, Anderton SM, Howie SEM, Whyte MKB, Rossi AG, Yao C. Facilitation of IL-22 production from innate lymphoid cells by prostaglandin E 2 prevents experimental lung neutrophilic inflammation. Thorax 2018; 73:1081-1084. [PMID: 29574419 PMCID: PMC6200127 DOI: 10.1136/thoraxjnl-2017-211097] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/28/2017] [Accepted: 02/19/2018] [Indexed: 12/11/2022]
Abstract
Acute lung injury is a neutrophil-dominant, life-threatening disease without effective therapies and better understanding of the pathophysiological mechanisms involved is an urgent need. Here we show that interleukin (IL)-22 is produced from innate lymphoid cells (ILC) and is responsible for suppression of experimental lung neutrophilic inflammation. Blocking prostaglandin E2 (PGE2) synthesis reduces lung ILCs and IL-22 production, resulting in exacerbation of lung neutrophilic inflammation. In contrast, activation of the PGE2 receptor EP4 prevents acute lung inflammation. We thus demonstrate a mechanism for production of innate IL-22 in the lung during acute injury, highlighting potential therapeutic strategies for control of lung neutrophilic inflammation by targeting the PGE2/ILC/IL-22 axis.
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Affiliation(s)
- Jennifer M Felton
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Rodger Duffin
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Calum T Robb
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Siobhan Crittenden
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Stephen M Anderton
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Sarah E M Howie
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Moira K B Whyte
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
| | - Chengcan Yao
- Medical Research Council (MRC) Centre for Inflammation Research, Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, UK
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Vermeren S, Karmakar U, Rossi AG. Immune complex-induced neutrophil functions: A focus on cell death. Eur J Clin Invest 2018; 48 Suppl 2:e12948. [PMID: 29734519 DOI: 10.1111/eci.12948] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 04/30/2018] [Indexed: 02/06/2023]
Abstract
Neutrophils are amongst the first cells to be recruited to sites of infection or trauma. Neutrophil functional responsiveness is tightly regulated by many agents including immune complexes. These immune cells can generate reactive oxygen species and degranulate to release abundant cytotoxic products, making them efficient at killing invading microorganisms. If neutrophil function is dysregulated, however, these cells have the potential to cause unwanted host tissue damage as exemplified by pathological and chronic inflammatory conditions. In physiological inflammation, once the initial insult has efficiently been dealt with, neutrophils are thought to leave the tissues or undergo programmed cells death, especially apoptosis. Apoptotic neutrophils are then rapidly removed by other phagocytes, primarily macrophages, by mechanisms that do not elicit a pro-inflammatory response. In this review, we discuss the interesting observations and consequences that immune complexes have on neutrophil cell death processes such as apoptosis.
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Affiliation(s)
- Sonja Vermeren
- The MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Utsa Karmakar
- The MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- The MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
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Vogt KL, Summers C, Chilvers ER, Condliffe AM. Priming and de-priming of neutrophil responses in vitro and in vivo. Eur J Clin Invest 2018; 48 Suppl 2:e12967. [PMID: 29896919 DOI: 10.1111/eci.12967] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 06/10/2018] [Indexed: 12/20/2022]
Abstract
The activation status of neutrophils can cycle from basal through primed to fully activated ("green-amber-red"), and at least in vitro, primed cells can spontaneously revert to a near basal phenotype. This broad range of neutrophil responsiveness confers extensive functional flexibility, allowing neutrophils to respond rapidly and appropriately to varied and evolving threats throughout the body. Primed and activated cells display dramatically enhanced bactericidal capacity (including augmented respiratory burst activity, degranulation and longevity), but this enhancement also confers the capacity for significant unintended tissue injury. Neutrophil priming and its consequences have been associated with adverse outcomes in a range of disease states, hence understanding the signalling processes that regulate the transition between basal and primed states (and back again) may offer new opportunities for therapeutic intervention in pathological settings. A wide array of host- and pathogen-derived molecules is able to modulate the functional status of these versatile cells. Reflecting this extensive repertoire of potential mediators, priming can be established by a range of signalling pathways (including mitogen-activated protein kinases, phosphoinositide 3-kinases, phospholipase D and calcium transients) and intracellular processes (including endocytosis, vesicle trafficking and the engagement of adhesion molecules). The signalling pathways engaged, and the exact cellular phenotype that results, vary according to the priming agent(s) to which the neutrophil is exposed and the precise environmental context. Herein we describe the signals that establish priming (in particular for enhanced respiratory burst, degranulation and prolonged lifespan) and describe the recently recognised process of de-priming, correlating in vitro observations with in vivo significance.
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Affiliation(s)
- Katja L Vogt
- Department of Infection, Immunity and Cardiovascular Diseases, University of Sheffield, Sheffield, UK.,Bateson Institute, University of Sheffield, Sheffield, UK
| | | | | | - Alison M Condliffe
- Department of Infection, Immunity and Cardiovascular Diseases, University of Sheffield, Sheffield, UK.,Bateson Institute, University of Sheffield, Sheffield, UK
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Crane MJ, Lee KM, FitzGerald ES, Jamieson AM. Surviving Deadly Lung Infections: Innate Host Tolerance Mechanisms in the Pulmonary System. Front Immunol 2018; 9:1421. [PMID: 29988424 PMCID: PMC6024012 DOI: 10.3389/fimmu.2018.01421] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/07/2018] [Indexed: 12/16/2022] Open
Abstract
Much research on infectious diseases focuses on clearing the pathogen through the use of antimicrobial drugs, the immune response, or a combination of both. Rapid clearance of pathogens allows for a quick return to a healthy state and increased survival. Pathogen-targeted approaches to combating infection have inherent limitations, including their pathogen-specific nature, the potential for antimicrobial resistance, and poor vaccine efficacy, among others. Another way to survive an infection is to tolerate the alterations to homeostasis that occur during a disease state through a process called host tolerance or resilience, which is independent from pathogen burden. Alterations in homeostasis during infection are numerous and include tissue damage, increased inflammation, metabolic changes, temperature changes, and changes in respiration. Given its importance and sensitivity, the lung is a good system for understanding host tolerance to infectious disease. Pneumonia is the leading cause of death for children under five worldwide. One reason for this is because when the pulmonary system is altered dramatically it greatly impacts the overall health and survival of a patient. Targeting host pathways involved in maintenance of pulmonary host tolerance during infection could provide an alternative therapeutic avenue that may be broadly applicable across a variety of pathologies. In this review, we will summarize recent findings on tolerance to host lung infection. We will focus on the involvement of innate immune responses in tolerance and how an initial viral lung infection may alter tolerance mechanisms in leukocytic, epithelial, and endothelial compartments to a subsequent bacterial infection. By understanding tolerance mechanisms in the lung we can better address treatment options for deadly pulmonary infections.
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Affiliation(s)
| | | | | | - Amanda M. Jamieson
- Division of Biology and Medicine, Department of Molecular Microbiology and Immunology, Brown University, Providence, RI, United States
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35
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Palmitic acid, but not high-glucose, induced myocardial apoptosis is alleviated by N‑acetylcysteine due to attenuated mitochondrial-derived ROS accumulation-induced endoplasmic reticulum stress. Cell Death Dis 2018; 9:568. [PMID: 29752433 PMCID: PMC5948205 DOI: 10.1038/s41419-018-0593-y] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 04/09/2018] [Accepted: 04/12/2018] [Indexed: 12/14/2022]
Abstract
Pharmacological inhibition of reactive oxygen species (ROS) is a potential strategy to prevent diabetes-induced cardiac dysfunction. This study was designed to investigate precise effects of antioxidant N‑acetylcysteine (NAC) in alleviating diabetic cardiomyopathy (DCM). Echocardiography and histologic studies were performed 12 weeks after streptozocin injection. Protein levels involved in endoplasmic reticulum stress (ERS) and apoptosis were analyzed by western blotting in diabetic hearts or high-glucose (HG, 30 mM)- and palmitic acid (PA, 300 μM)-cultured neonatal rat cardiomyocytes (NRCMs). ROS generation and structural alterations of mitochondria were also assessed. We report that NAC alleviated diabetes-induced cardiac abnormality, including restored ejection fraction (EF %), fraction shortening (FS %), peak E to peak A ratio (E/A) and reduced cardiac hypertrophy and fibrosis. These effects were concomitant with blocked ERS and apoptosis, as evidenced by inactivation of phosphorylated inositol-requiring enzyme-1α (IRE1α)/spliced X-box binding protein 1 (XBP1), phosphorylated protein kinase-like kinase (PERK)/phosphorylated eukaryotic initiation factor 2α (eIF2α) and glucose-regulated protein 78 (GRP78)/activating transcription factor 6 (ATF6α)/C/EBP homologous protein (CHOP) pathways, as well as suppressed Bcl-2-associated X protein (BAX)/B-cell lymphoma-2 (Bcl-2) and cleaved caspase 3 expressions. Mechanistically, PA mediated excessive mitochondrial ROS generation and oxidative stress, which were antagonized by NAC and Mito-TEMPO, a mitochondrial ROS inhibitor. No effects were noted by addition of apocynin, a nicotinamide adenine dinucleotide phosphate (NADPH) oxidase inhibitor, and NADPH oxidase 4 (NOX 4) and NOX 2 expressions were not altered, indicating that PA-induced ROS generation is independent of NADPH oxidases. Most intriguingly, HG failed to promote ROS production despite its ability to promote ERS and apoptosis in NRCMs. Collectively, these findings indicate that NAC primarily abrogates PA-mediated mitochondrial ROS through ERS and therefore alleviates myocardial apoptosis but has little effect on HG-induced cardiac injury. This uncovers a potential role for NAC in formulating novel cardioprotective strategies in DCM patients.
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36
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Gray RD. NETs in pneumonia: is just enough the right amount? Eur Respir J 2018; 51:51/4/1800619. [DOI: 10.1183/13993003.00619-2018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 04/09/2018] [Indexed: 12/24/2022]
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37
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Felton JM, Lucas CD, Dorward DA, Duffin R, Kipari T, Vermeren S, Robb CT, MacLeod KG, Serrels B, Schwarze J, Haslett C, Dransfield I, Rossi AG. Mer-mediated eosinophil efferocytosis regulates resolution of allergic airway inflammation. J Allergy Clin Immunol 2018; 142:1884-1893.e6. [PMID: 29428392 PMCID: PMC6281028 DOI: 10.1016/j.jaci.2018.01.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/07/2017] [Accepted: 01/05/2018] [Indexed: 12/30/2022]
Abstract
Background Eosinophils play a central role in propagation of allergic diseases, including asthma. Both recruitment and retention of eosinophils regulate pulmonary eosinophilia, but the question of whether alterations in apoptotic cell clearance by phagocytes contributes directly to resolution of allergic airway inflammation remains unexplored. Objectives In this study we investigated the role of the receptor tyrosine kinase Mer in mediating apoptotic eosinophil clearance and allergic airway inflammation resolution in vivo to establish whether apoptotic cell clearance directly affects the resolution of allergic airway inflammation. Methods Alveolar and bone marrow macrophages were used to study Mer-mediated phagocytosis of apoptotic eosinophils. Allergic airway inflammation resolution was modeled in mice by using ovalbumin. Fluorescently labeled apoptotic cells were administered intratracheally or eosinophil apoptosis was driven by administration of dexamethasone to determine apoptotic cell clearance in vivo. Results Inhibition or absence of Mer impaired phagocytosis of apoptotic human and mouse eosinophils by macrophages. Mer-deficient mice showed delayed resolution of ovalbumin-induced allergic airway inflammation, together with increased airway responsiveness to aerosolized methacholine, increased bronchoalveolar lavage fluid protein levels, altered cytokine production, and an excess of uncleared dying eosinophils after dexamethasone treatment. Alveolar macrophage phagocytosis was significantly Mer dependent, with the absence of Mer attenuating apoptotic cell clearance in vivo to enhance inflammation in response to apoptotic cells. Conclusions We demonstrate that Mer-mediated apoptotic cell clearance by phagocytes contributes to resolution of allergic airway inflammation, suggesting that augmenting apoptotic cell clearance is a potential therapeutic strategy for treating allergic airway inflammation.
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Affiliation(s)
- Jennifer M Felton
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Christopher D Lucas
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom.
| | - David A Dorward
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Rodger Duffin
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Tiina Kipari
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Sonja Vermeren
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Calum T Robb
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Kenneth G MacLeod
- MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital Campus, Edinburgh, United Kingdom
| | - Bryan Serrels
- MRC Institute of Genetics and Molecular Medicine, University of Edinburgh, Western General Hospital Campus, Edinburgh, United Kingdom
| | - Jürgen Schwarze
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Christopher Haslett
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Ian Dransfield
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Adriano G Rossi
- MRC Centre for Inflammation Research, the Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
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Chiang N, Serhan CN. Structural elucidation and physiologic functions of specialized pro-resolving mediators and their receptors. Mol Aspects Med 2017; 58:114-129. [PMID: 28336292 PMCID: PMC5623601 DOI: 10.1016/j.mam.2017.03.005] [Citation(s) in RCA: 236] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/13/2017] [Indexed: 12/14/2022]
Abstract
The acute inflammatory response is host-protective to contain foreign invaders. Many of today's pharmacopeia that block pro-inflammatory chemical mediators can cause serious unwanted side effects such as immune suppression. Uncontrolled inflammation is now considered a pathophysiologic basis associated with many widely occurring diseases such as cardiovascular disease, neurodegenerative diseases, diabetes, obesity and asthma, as well as the classic inflammatory diseases, e.g. arthritis, periodontal diseases. The inflammatory response is designated to be a self-limited process that produces a superfamily of chemical mediators that stimulate resolution of inflammatory responses. Specialized proresolving mediators (SPM) uncovered in recent years are endogenous mediators that include omega-3-derived families resolvins, protectins and maresins, as well as arachidonic acid-derived (n-6) lipoxins that stimulate and promote resolution of inflammation, clearance of microbes, reduce pain and promote tissue regeneration via novel mechanisms. Here, we review recent evidence from human and preclinical animal studies, together with the structural and functional elucidation of SPM indicating the SPM as physiologic mediators and pharmacologic agonists that stimulate resolution of inflammation and infection. These results suggest that it is time to develop immunoresolvents as agonists for testing resolution pharmacology in nutrition and health as well as in human diseases and during surgery.
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Affiliation(s)
- Nan Chiang
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States
| | - Charles N Serhan
- Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, United States.
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Non-canonical PI3K-Cdc42-Pak-Mek-Erk Signaling Promotes Immune-Complex-Induced Apoptosis in Human Neutrophils. Cell Rep 2017; 17:374-386. [PMID: 27705787 PMCID: PMC5067281 DOI: 10.1016/j.celrep.2016.09.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 08/08/2016] [Accepted: 08/31/2016] [Indexed: 12/21/2022] Open
Abstract
Neutrophils are peripheral blood leukocytes that represent the first line of immune cell defense against bacterial and fungal infections but are also crucial players in the generation of the inflammatory response. Many neutrophil cell surface receptors regulate important cellular processes via activation of agonist-activated PI3Ks. We show here that activation of human neutrophils with insoluble immune complexes drives a previously uncharacterized, PI3K-dependent, non-canonical, pro-apoptotic signaling pathway, FcγR-PI3Kβ/δ-Cdc42-Pak-Mek-Erk. This is a rare demonstration of Ras/Raf-independent activation of Erk and of PI3K-mediated activation of Cdc42. In addition, comparative analysis of immune-complex- and fMLF-induced signaling uncovers key differences in pathways used by human and murine neutrophils. The non-canonical pathway we identify in this study may be important for the resolution of inflammation in chronic inflammatory diseases that rely on immune-complex-driven neutrophil activation. Immune-complex-activated human neutrophils use PI3Kβ/δ-Cdc42-Pak-Mek-Erk signaling Immune-complex-induced non-canonical neutrophil signaling is pro-apoptotic Other immune-complex-induced neutrophil functions depend on alternative PI3K effectors Immune-complex-induced PI3K signaling is not conserved between humans and mice
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MiR-29b antagonizes the pro-inflammatory tumor-promoting activity of multiple myeloma-educated dendritic cells. Leukemia 2017; 32:1003-1015. [PMID: 29158557 PMCID: PMC5886056 DOI: 10.1038/leu.2017.336] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/05/2017] [Accepted: 11/10/2017] [Indexed: 12/29/2022]
Abstract
Dendritic cells (DCs) have a key role in regulating tumor immunity, tumor cell growth and drug resistance. We hypothesized that multiple myeloma (MM) cells might recruit and reprogram DCs to a tumor-permissive phenotype by changes within their microRNA (miRNA) network. By analyzing six different miRNA-profiling data sets, miR-29b was identified as the only miRNA upregulated in normal mature DCs and significantly downregulated in tumor-associated DCs. This finding was validated in primary DCs co-cultured in vitro with MM cell lines and in primary bone marrow DCs from MM patients. In DCs co-cultured with MM cells, enforced expression of miR-29b counteracted pro-inflammatory pathways, including signal transducer and activator of transcription 3 and nuclear factor-κB, and cytokine/chemokine signaling networks, which correlated with patients' adverse prognosis and development of bone disease. Moreover, miR-29b downregulated interleukin-23 in vitro and in the SCID-synth-hu in vivo model, and antagonized a Th17 inflammatory response. All together, these effects translated into strong anti-proliferative activity and reduction of genomic instability of MM cells. Our study demonstrates that MM reprograms the DCs functional phenotype by downregulating miR-29b whose reconstitution impairs DCs ability to sustain MM cell growth and survival. These results underscore miR-29b as an innovative and attractive candidate for miRNA-based immune therapy of MM.
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Beneficial effects of Red Light-Emitting Diode treatment in experimental model of acute lung injury induced by sepsis. Sci Rep 2017; 7:12670. [PMID: 28978926 PMCID: PMC5627274 DOI: 10.1038/s41598-017-13117-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 09/19/2017] [Indexed: 11/18/2022] Open
Abstract
Sepsis is a severe disease with a high mortality index and it is responsible for the development of acute lung injury (ALI). We evaluated the effects of light-emitting diode (LED) on ALI induced by sepsis. Balb-c mice were injected with lipopolysaccharide or saline and then irradiated or not with red LED on their tracheas and lungs for 150 s, 2 and 6 h after LPS injections. The parameters were investigated 24 h after the LPS injections. Red LED treatment reduced neutrophil influx and the levels of interleukins 1β, 17 A and, tumor necrosis factor-α; in addition to enhanced levels of interferon γ in the bronchoalveolar fluid. Moreover, red LED treatment enhanced the RNAm levels of IL-10 and IFN-γ. It also partially reduced the elevated oxidative burst and enhanced apoptosis, but it did not alter the translocation of nuclear factor κB, the expression of toll-like receptor 4 (TLR4), as well as, oedema or mucus production in their lung tissues. Together, our data has shown the beneficial effects of short treatment with LED on ALI that are caused by gram negative bacterial infections. It is suggested that LED applications are an inexpensive and non-invasive additional treatment for sepsis.
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Gray RD, Hardisty G, Regan KH, Smith M, Robb CT, Duffin R, Mackellar A, Felton JM, Paemka L, McCullagh BN, Lucas CD, Dorward DA, McKone EF, Cooke G, Donnelly SC, Singh PK, Stoltz DA, Haslett C, McCray PB, Whyte MKB, Rossi AG, Davidson DJ. Delayed neutrophil apoptosis enhances NET formation in cystic fibrosis. Thorax 2017; 73:134-144. [PMID: 28916704 PMCID: PMC5771859 DOI: 10.1136/thoraxjnl-2017-210134] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 08/05/2017] [Accepted: 08/21/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Cystic fibrosis (CF) lung disease is defined by large numbers of neutrophils and associated damaging products in the airway. Delayed neutrophil apoptosis is described in CF although it is unclear whether this is a primary neutrophil defect or a response to chronic inflammation. Increased levels of neutrophil extracellular traps (NETs) have been measured in CF and we aimed to investigate the causal relationship between these phenomena and their potential to serve as a driver of inflammation. We hypothesised that the delay in apoptosis in CF is a primary defect and preferentially allows CF neutrophils to form NETs, contributing to inflammation. METHODS Blood neutrophils were isolated from patients with CF, CF pigs and appropriate controls. Neutrophils were also obtained from patients with CF before and after commencing ivacaftor. Apoptosis was assessed by morphology and flow cytometry. NET formation was determined by fluorescent microscopy and DNA release assays. NET interaction with macrophages was examined by measuring cytokine generation with ELISA and qRT-PCR. RESULTS CF neutrophils live longer due to decreased apoptosis. This was observed in both cystic fibrosis transmembrane conductance regulator (CFTR) null piglets and patients with CF, and furthermore was reversed by ivacaftor (CFTR potentiator) in patients with gating (G551D) mutations. CF neutrophils formed more NETs and this was reversed by cyclin-dependent kinase inhibitor exposure. NETs provided a proinflammatory stimulus to macrophages, which was enhanced in CF. CONCLUSIONS CF neutrophils have a prosurvival phenotype that is associated with an absence of CFTR function and allows increased NET production, which can in turn induce inflammation. Augmenting neutrophil apoptosis in CF may allow more appropriate neutrophil disposal, decreasing NET formation and thus inflammation.
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Affiliation(s)
- Robert D Gray
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Gareth Hardisty
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Kate H Regan
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Maeve Smith
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Calum T Robb
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Rodger Duffin
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Annie Mackellar
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Jennifer M Felton
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Lily Paemka
- Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Brian N McCullagh
- Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Christopher D Lucas
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - David A Dorward
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Edward F McKone
- Department of Respiratory Medicine, St Vincent's Hospital, Dublin, Ireland
| | - Gordon Cooke
- Department of Medicine, Trinity College Dublin and Tallaght Hospital, Dublin, Ireland
| | - Seamas C Donnelly
- Department of Medicine, Trinity College Dublin and Tallaght Hospital, Dublin, Ireland
| | - Pradeep K Singh
- Department of Microbiology, Washington University Medical School, Seattle, Washington, USA
| | - David A Stoltz
- Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Christopher Haslett
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Paul B McCray
- Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Moira K B Whyte
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
| | - Donald J Davidson
- UoE/MRC Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
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Martin C, Ohayon D, Alkan M, Mocek J, Pederzoli-Ribeil M, Candalh C, Thevenot G, Millet A, Tamassia N, Cassatella MA, Thieblemont N, Burgel PR, Witko-Sarsat V. Neutrophil-Expressed p21/waf1 Favors Inflammation Resolution in Pseudomonas aeruginosa Infection. Am J Respir Cell Mol Biol 2017; 54:740-50. [PMID: 26517580 DOI: 10.1165/rcmb.2015-0047oc] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Neutrophil-associated inflammation during Pseudomonas aeruginosa lung infection is a determinant of morbidity in cystic fibrosis (CF). Neutrophil apoptosis is a key factor in inflammation resolution and is controlled by cytosolic proliferating cell nuclear antigen (PCNA). p21/Waf1, a cyclin-dependent kinase inhibitor, is a partner of PCNA, and its mRNA is up-regulated in human neutrophils during LPS challenge. We show here that, after 7 days of persistent infection with P. aeruginosa, neutrophilic inflammation was more prominent in p21(-/-) compared with wild-type (WT) mice. Notably, no intrinsic defect in the phagocytosis of apoptotic cells by macrophages was found in p21(-/-) compared with WT mice. Inflammatory cell analysis in peritoneal lavages after zymosan-induced peritonitis showed a significantly increased number of neutrophils at 48 hours in p21(-/-) compared with WT mice. In vitro analysis was consistent with delayed neutrophil apoptosis in p21(-/-) compared with WT mice. Ectopic expression of p21/waf1 in neutrophil-differentiated PLB985 cells potentiated apoptosis and reversed the prosurvival effect of PCNA. In human neutrophils, p21 messenger RNA was induced by TNF-α, granulocyte colony-stimulating factor, and LPS. Neutrophils isolated from patients with CF showed enhanced survival, which was reduced after treatment with a carboxy-peptide derived from the sequence of p21/waf1. Notably, p21/waf1 was detected by immunohistochemistry in neutrophils within lungs from patients with CF. Our data reveal a novel role for p21/waf1 in the resolution of inflammation via its ability to control neutrophil apoptosis. This mechanism may be relevant in the neutrophil-dominated inflammation observed in CF and other chronic inflammatory lung conditions.
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Affiliation(s)
- Clémence Martin
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,2 Department of Pneumology, Cochin Hospital, France
| | - Delphine Ohayon
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Manal Alkan
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Julie Mocek
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Magali Pederzoli-Ribeil
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Céline Candalh
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Guiti Thevenot
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Arnaud Millet
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Nicola Tamassia
- 6 Department of Medicine, Section of General Pathology, Verona, Italy
| | | | - Nathalie Thieblemont
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
| | - Pierre-Régis Burgel
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,2 Department of Pneumology, Cochin Hospital, France
| | - Véronique Witko-Sarsat
- 1 Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,3 Institut National de la Santé et de la Recherche Médicale U1016, Institut Cochin, Paris, France.,4 Centre National de la Recherche Scientifique UMR8104, Paris France.,5 Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Excellence Inflamex, Paris, France; and
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Tavares LP, Garcia CC, Vago JP, Queiroz-Junior CM, Galvão I, David BA, Rachid MA, Silva PMR, Russo RC, Teixeira MM, Sousa LP. Inhibition of Phosphodiesterase-4 during Pneumococcal Pneumonia Reduces Inflammation and Lung Injury in Mice. Am J Respir Cell Mol Biol 2017; 55:24-34. [PMID: 26677751 DOI: 10.1165/rcmb.2015-0083oc] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pneumococcal pneumonia is a leading cause of mortality worldwide. The inflammatory response to bacteria is necessary to control infection, but it may also contribute to tissue damage. Phosphodiesterase-4 inhibitors, such as rolipram (ROL), effectively reduce inflammation. Here, we examined the impact of ROL in a pneumococcal pneumonia murine model. Mice were infected intranasally with 10(5)-10(6) CFU of Streptococcus pneumoniae, treated with ROL in a prophylactic or therapeutic schedule in combination, or not, with the antibiotic ceftriaxone. Inflammation and bacteria counts were assessed, and ex vivo phagocytosis assays were performed. ROL treatment during S. pneumoniae infection decreased neutrophil recruitment into lungs and airways and reduced lung injury. Prophylactic ROL treatment also decreased cytokine levels in the airways. Although modulation of inflammation by ROL ameliorated pneumonia, bacteria burden was not reduced. On the other hand, antibiotic therapy reduced bacteria without reducing neutrophil infiltration, cytokine level, or lung injury. Combined ROL and ceftriaxone treatment decreased lethality rates and was more efficient in reducing inflammation, by increasing proresolving protein annexin A1 (AnxA1) expression, and bacterial burden by enhancing phagocytosis. Lack of AnxA1 increased inflammation and lethality induced by pneumococcal infection. These data show that immunomodulatory effects of phosphodiesterase-4 inhibitors are useful during severe pneumococcal pneumonia and suggest their potential benefit as adjunctive therapy during infectious diseases.
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Affiliation(s)
- Luciana P Tavares
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cristiana C Garcia
- 2 Laboratório de Vírus Respiratórios e do Sarampo, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Juliana P Vago
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,3 Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Celso M Queiroz-Junior
- 4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Izabela Galvão
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Bruna A David
- 4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Milene A Rachid
- 5 Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Patrícia M R Silva
- 6 Laboratório de Inflamação, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil and
| | - Remo C Russo
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,7 Laboratório de Imunologia e Mecânica Pulmonar, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro M Teixeira
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lirlândia P Sousa
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,3 Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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Sarabhai T, Peter C, Bär AK, Windolf J, Relja B, Wesselborg S, Wahlers T, Paunel-Görgülü A. Serum α-1 Antitrypsin (AAT) antagonizes intrinsic apoptosis induction in neutrophils from patients with systemic inflammatory response syndrome. PLoS One 2017; 12:e0177450. [PMID: 28493974 PMCID: PMC5426753 DOI: 10.1371/journal.pone.0177450] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 04/27/2017] [Indexed: 12/23/2022] Open
Abstract
Excessive neutrophil activation accompanied by delayed apoptotic cell death in inflammatory conditions causes progressive damage of cells and tissues, leading to life-threatening multiple organ dysfunction syndrome. Previous work suggested that circulating serum factors during inflammation are critically involved in the suppression of neutrophil cell death although the identity of these antiapoptotic mediators remained elusive. In this study, we identified the acute phase protein α-1 Antitrypsin (AAT) as a potent suppressor of staurosporine (STS)-induced apoptosis in human neutrophils through a mechanism implicating caspases-independent pathways. We show here that serum levels of AAT, potentially in part released by stimulated neutrophils, are markedly elevated in major trauma patients suffering from systemic inflammatory response syndrome (SIRS). Notably, AAT depletion from serum increased sensitivity of human neutrophils for STS-induced cell death. In fact, AAT was demonstrated to confer intrinsic apoptosis resistance by preventing PKC/Akt inactivation and subsequent proteasomal degradation of antiapoptotic Mcl-1 protein in response to STS treatment. Neither MAP kinase ERK1/2 nor caspases were found to be involved in AAT-triggered antiapoptotic pathways in neutrophils. In summary, these results establish a novel pivotal role of circulating AAT in mediating survival by antagonizing the proapoptotic action of the PKC inhibitor STS and should be considered for AAT augmentation therapies in future.
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Affiliation(s)
- Theresia Sarabhai
- Department of Trauma and Hand Surgery, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Christoph Peter
- Institute for Molecular Medicine I, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Anne-Kathrin Bär
- Department of Cardiothoracic Surgery, Heart Center of the University of Cologne, Cologne, Germany
| | - Joachim Windolf
- Department of Trauma and Hand Surgery, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Borna Relja
- Department of Trauma, Hand and Reconstructive Surgery, University Hospital Frankfurt, Goethe University, Frankfurt, Germany
| | - Sebastian Wesselborg
- Institute for Molecular Medicine I, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Thorsten Wahlers
- Department of Cardiothoracic Surgery, Heart Center of the University of Cologne, Cologne, Germany
| | - Adnana Paunel-Görgülü
- Department of Cardiothoracic Surgery, Heart Center of the University of Cologne, Cologne, Germany
- * E-mail:
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Dorward DA, Lucas CD, Doherty MK, Chapman GB, Scholefield EJ, Conway Morris A, Felton JM, Kipari T, Humphries DC, Robb CT, Simpson AJ, Whitfield PD, Haslett C, Dhaliwal K, Rossi AG. Novel role for endogenous mitochondrial formylated peptide-driven formyl peptide receptor 1 signalling in acute respiratory distress syndrome. Thorax 2017; 72:928-936. [PMID: 28469031 PMCID: PMC5738532 DOI: 10.1136/thoraxjnl-2017-210030] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 03/28/2017] [Accepted: 04/02/2017] [Indexed: 01/23/2023]
Abstract
Background Acute respiratory distress syndrome (ARDS) is an often fatal neutrophil-dominant lung disease. Although influenced by multiple proinflammatory mediators, identification of suitable therapeutic candidates remains elusive. We aimed to delineate the presence of mitochondrial formylated peptides in ARDS and characterise the functional importance of formyl peptide receptor 1 (FPR1) signalling in sterile lung inflammation. Methods Mitochondrial formylated peptides were identified in bronchoalveolar lavage fluid (BALF) and serum of patients with ARDS by liquid chromatography–tandem mass spectrometry. In vitro, human neutrophils were stimulated with mitochondrial formylated peptides and their effects assessed by flow cytometry and chemotaxis assay. Mouse lung injury was induced by mitochondrial formylated peptides or hydrochloric acid. Bone marrow chimeras determined the contribution of myeloid and parenchymal FPR1 to sterile lung inflammation. Results Mitochondrial formylated peptides were elevated in BALF and serum from patients with ARDS. These peptides drove neutrophil activation and chemotaxis through FPR1-dependent mechanisms in vitro and in vivo. In mouse lung injury, inflammation was attenuated in Fpr1−/− mice, effects recapitulated by a pharmacological FPR1 antagonist even when administered after the onset of injury. FPR1 expression was present in alveolar epithelium and chimeric mice demonstrated that both myeloid and parenchymal FPR1 contributed to lung inflammation. Conclusions We provide the first definitive evidence of mitochondrial formylated peptides in human disease and demonstrate them to be elevated in ARDS and important in a mouse model of lung injury. This work reveals mitochondrial formylated peptide FPR1 signalling as a key driver of sterile acute lung injury and a potential therapeutic target in ARDS.
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Affiliation(s)
- David A Dorward
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Christopher D Lucas
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Mary K Doherty
- Department of Diabetes and Cardiovascular Science, Division of Health Research, University of the Highlands and Islands, Inverness, UK
| | - Gavin B Chapman
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Emma J Scholefield
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | | | - Jennifer M Felton
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Tiina Kipari
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Duncan C Humphries
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Calum T Robb
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - A John Simpson
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Phillip D Whitfield
- Department of Diabetes and Cardiovascular Science, Division of Health Research, University of the Highlands and Islands, Inverness, UK
| | - Christopher Haslett
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Kevin Dhaliwal
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
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Hoodless LJ, Lucas CD, Duffin R, Denvir MA, Haslett C, Tucker CS, Rossi AG. Genetic and pharmacological inhibition of CDK9 drives neutrophil apoptosis to resolve inflammation in zebrafish in vivo. Sci Rep 2016; 5:36980. [PMID: 27833165 PMCID: PMC5105078 DOI: 10.1038/srep36980] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 10/24/2016] [Indexed: 01/12/2023] Open
Abstract
Neutrophilic inflammation is tightly regulated and subsequently resolves to limit tissue damage and promote repair. When the timely resolution of inflammation is dysregulated, tissue damage and disease results. One key control mechanism is neutrophil apoptosis, followed by apoptotic cell clearance by phagocytes such as macrophages. Cyclin-dependent kinase (CDK) inhibitor drugs induce neutrophil apoptosis in vitro and promote resolution of inflammation in rodent models. Here we present the first in vivo evidence, using pharmacological and genetic approaches, that CDK9 is involved in the resolution of neutrophil-dependent inflammation. Using live cell imaging in zebrafish with labelled neutrophils and macrophages, we show that pharmacological inhibition, morpholino-mediated knockdown and CRISPR/cas9-mediated knockout of CDK9 enhances inflammation resolution by reducing neutrophil numbers via induction of apoptosis after tailfin injury. Importantly, knockdown of the negative regulator La-related protein 7 (LaRP7) increased neutrophilic inflammation. Our data show that CDK9 is a possible target for controlling resolution of inflammation.
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Affiliation(s)
- Laura J. Hoodless
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Christopher D. Lucas
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Rodger Duffin
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Martin A. Denvir
- BHF Centre for Cardiovascular Science, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Christopher Haslett
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Carl S. Tucker
- BHF Centre for Cardiovascular Science, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
| | - Adriano G. Rossi
- MRC Centre for Inflammation Research, The Queen’s Medical Research Institute, The University of Edinburgh, Edinburgh, EH16 4TJ, United Kingdom
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Dorward DA, Felton JM, Robb CT, Craven T, Kipari T, Walsh TS, Haslett C, Kefala K, Rossi AG, Lucas CD. The cyclin-dependent kinase inhibitor AT7519 accelerates neutrophil apoptosis in sepsis-related acute respiratory distress syndrome. Thorax 2016; 72:182-185. [PMID: 27965411 PMCID: PMC5284332 DOI: 10.1136/thoraxjnl-2016-209229] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 09/13/2016] [Accepted: 09/21/2016] [Indexed: 02/04/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a neutrophil-dominant disorder with no effective pharmacological therapies. While the cyclin-dependent kinase inhibitor AT7519 induces neutrophil apoptosis to promote inflammation resolution in preclinical models of lung inflammation, its potential efficacy in ARDS has not been examined. Untreated peripheral blood sepsis-related ARDS neutrophils demonstrated prolonged survival after 20 hours in vitro culture. AT7519 was able to override this phenotype to induce apoptosis in ARDS neutrophils with reduced expression of the pro-survival protein Mcl-1. We demonstrate the first pharmacological compound to induce neutrophil apoptosis in sepsis-related ARDS, highlighting cyclin-dependent kinase inhibitors as potential novel therapeutic agents.
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Affiliation(s)
- David A Dorward
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Jennifer M Felton
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Calum T Robb
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Thomas Craven
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Tiina Kipari
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Timothy S Walsh
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK.,Department of Critical Care, Anaesthesia and Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Christopher Haslett
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Kallirroi Kefala
- Department of Critical Care, Anaesthesia and Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Adriano G Rossi
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Christopher D Lucas
- The MRC Centre for Inflammation Research, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
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Zurier RB, Burstein SH. Cannabinoids, inflammation, and fibrosis. FASEB J 2016; 30:3682-3689. [DOI: 10.1096/fj.201600646r] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 07/11/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Robert B. Zurier
- Department of Medicine and Department of Biochemistry and Molecular PharmacologyUniversity of Massachusetts Medical School Worcester Massachusetts USA
| | - Sumner H. Burstein
- Department of Medicine and Department of Biochemistry and Molecular PharmacologyUniversity of Massachusetts Medical School Worcester Massachusetts USA
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50
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Coutinho AE, Kipari TMJ, Zhang Z, Esteves CL, Lucas CD, Gilmour JS, Webster SP, Walker BR, Hughes J, Savill JS, Seckl JR, Rossi AG, Chapman KE. 11β-Hydroxysteroid Dehydrogenase Type 1 Is Expressed in Neutrophils and Restrains an Inflammatory Response in Male Mice. Endocrinology 2016; 157:2928-36. [PMID: 27145012 PMCID: PMC4929552 DOI: 10.1210/en.2016-1118] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Endogenous glucocorticoid action within cells is enhanced by prereceptor metabolism by 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1), which converts intrinsically inert cortisone and 11-dehydrocorticosterone into active cortisol and corticosterone, respectively. 11β-HSD1 is highly expressed in immune cells elicited to the mouse peritoneum during thioglycollate-induced peritonitis and is down-regulated as the inflammation resolves. During inflammation, 11β-HSD1-deficient mice show enhanced recruitment of inflammatory cells and delayed acquisition of macrophage phagocytic capacity. However, the key cells in which 11β-HSD1 exerts these effects remain unknown. Here we have identified neutrophils (CD11b(+),Ly6G(+),7/4(+) cells) as the thioglycollate-recruited cells that most highly express 11β-HSD1 and show dynamic regulation of 11β-HSD1 in these cells during an inflammatory response. Flow cytometry showed high expression of 11β-HSD1 in peritoneal neutrophils early during inflammation, declining at later states. In contrast, expression in blood neutrophils continued to increase during inflammation. Ablation of monocytes/macrophages by treatment of CD11b-diphtheria-toxin receptor transgenic mice with diphtheria toxin prior to thioglycollate injection had no significant effect on 11β-HSD1 activity in peritoneal cells, consistent with neutrophils being the predominant 11β-HSD1 expressing cell type at this time. Similar to genetic deficiency in 11β-HSD1, acute inhibition of 11β-HSD1 activity during thioglycollate-induced peritonitis augmented inflammatory cell recruitment to the peritoneum. These data suggest that neutrophil 11β-HSD1 increases during inflammation to contribute to the restraining effect of glucocorticoids upon neutrophil-mediated inflammation. In human neutrophils, lipopolysaccharide activation increased 11β-HSD1 expression, suggesting the antiinflammatory effects of 11β-HSD1 in neutrophils may be conserved in humans.
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Affiliation(s)
- Agnes E Coutinho
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Tiina M J Kipari
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Zhenguang Zhang
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Cristina L Esteves
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Christopher D Lucas
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - James S Gilmour
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Scott P Webster
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Brian R Walker
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Jeremy Hughes
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - John S Savill
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Jonathan R Seckl
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Adriano G Rossi
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
| | - Karen E Chapman
- Centre for Cardiovascular Science (A.E.C., T.M.J.K., Z.Z., C.L.E., J.S.G., S.P.W., B.R.W., J.R.S., K.E.C.) and Medical Research Council Centre for Inflammation Research (A.E.C., C.D.L., J.S.G., J.H., J.S.S., A.G.R.), Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
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