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Savchenko V, Szamosvári D, Bao Y, Pignitter M, Böttcher T. Biosynthetic flexibility of Pseudomonas aeruginosa leads to hydroxylated 2-alkylquinolones with proinflammatory host response. Commun Chem 2023; 6:138. [PMID: 37400564 DOI: 10.1038/s42004-023-00937-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 06/19/2023] [Indexed: 07/05/2023] Open
Abstract
The human pathogen Pseudomonas aeruginosa produces various 4(1H)-quinolones with diverse functions. Among these, 2-nonyl-4(1H)-quinolone (NQ) and its N-oxide (NQNO) belong to the main metabolites. Their biosynthesis involves substrates from the fatty acid metabolism and we hypothesized that oxidized fatty acids could be responsible for a so far undetected class of metabolites. We developed a divergent synthesis strategy for 2'-hydroxy (2'-OH) and 2'-oxo- substituted quinolones and N-oxides and demonstrated for the first time that 2'-OH-NQ and 2'-OH-NQNO but not the corresponding 2'-oxo compounds are naturally produced by PAO1 and PA14 strains of P. aeruginosa. The main metabolite 2'-OH-NQ is produced even in concentrations comparable to NQ. Exogenous availability of β-hydroxydecanoic acid can further increase the production of 2'-OH-NQ. In contrast to NQ, 2'-OH-NQ potently induced the cytokine IL-8 in a human cell line at 100 nм, suggesting a potential role in host immune modulation.
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Affiliation(s)
- Viktoriia Savchenko
- Faculty of Chemistry, Institute for Biological Chemistry & Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystems Science, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090, Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090, Vienna, Austria
| | - Dávid Szamosvári
- Faculty of Chemistry, Institute for Biological Chemistry & Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystems Science, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090, Vienna, Austria
| | - Yifan Bao
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090, Vienna, Austria
- Faculty of Chemistry, Institute for Physiological Chemistry, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090, Vienna, Austria
| | - Marc Pignitter
- Faculty of Chemistry, Institute for Physiological Chemistry, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090, Vienna, Austria
| | - Thomas Böttcher
- Faculty of Chemistry, Institute for Biological Chemistry & Centre for Microbiology and Environmental Systems Science, Department of Microbiology and Ecosystems Science, University of Vienna, Josef-Holaubek-Platz 2 (UZA II), 1090, Vienna, Austria.
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2
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Juhas M. Communication Between Microorganisms. BRIEF LESSONS IN MICROBIOLOGY 2023:27-41. [DOI: 10.1007/978-3-031-29544-7_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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3
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Xiao Y, Zou H, Li J, Song T, Lv W, Wang W, Wang Z, Tao S. Impact of quorum sensing signaling molecules in gram-negative bacteria on host cells: current understanding and future perspectives. Gut Microbes 2022; 14:2039048. [PMID: 35188058 PMCID: PMC8865250 DOI: 10.1080/19490976.2022.2039048] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Quorum sensing is a molecular signaling-based communication mechanism in prokaryotes. In the basic mode, signaling molecules released by certain bacteria are sensed by intracellular receptors or membrane-bound receptors of other members in the community, leading to the collective isogenic signaling molecule synthesis and synchronized activities. This regulation is important for the symbiosis of the bacterium with the host, as well as virulence and biofilm formation. Notably, quorum sensing signaling molecules are not only able to control microbial community behavior but can likewise regulate the physiological status of host cells. Here, we provide a comprehensive review of the importance of quorum sensing signaling molecules in gram-negative bacteria in regulating host cell function and gut health, and suggest possible opportunities for application in combating human and animal diseases by blocking the pathways through which quorum sensing signaling molecules exert their functions.
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Affiliation(s)
- Yingping Xiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products and Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Huicong Zou
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jingjing Li
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Tongxing Song
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Wentao Lv
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products and Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Wen Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products and Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Zhenyu Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shiyu Tao
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, China,CONTACT Shiyu TaoCollege of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, 430070China
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Lichtenberg M, Jakobsen TH, Kühl M, Kolpen M, Jensen PØ, Bjarnsholt T. OUP accepted manuscript. FEMS Microbiol Rev 2022; 46:6574409. [PMID: 35472245 PMCID: PMC9438473 DOI: 10.1093/femsre/fuac018] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 04/04/2022] [Accepted: 04/24/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Mads Lichtenberg
- Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3B, 2200, København, Denmark
| | - Tim Holm Jakobsen
- Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3B, 2200, København, Denmark
| | - Michael Kühl
- Marine Biological Section, Department of Biology, University of Copenhagen, Strandpromenaden 5, 3000 Helsingør, Denmark
| | - Mette Kolpen
- Department of Clinical Microbiology, Copenhagen University Hospital, Ole Maaløes vej 26, 2200, København, Denmark
| | - Peter Østrup Jensen
- Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3B, 2200, København, Denmark
- Department of Clinical Microbiology, Copenhagen University Hospital, Ole Maaløes vej 26, 2200, København, Denmark
| | - Thomas Bjarnsholt
- Corresponding author: Costerton Biofilm Center, Department of Immunology and Microbiology, University of Copenhagen, Blegdamsvej 3B, 2200, København, Denmark. Tel: +45 20659888; E-mail:
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Tobita N, Tsuneto K, Ito S, Yamamoto T. Human TRPV1 and TRPA1 are receptors for bacterial quorum sensing molecules. J Biochem 2021; 170:775-785. [PMID: 34557892 DOI: 10.1093/jb/mvab099] [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] [Received: 06/23/2021] [Accepted: 09/17/2021] [Indexed: 11/13/2022] Open
Abstract
In this study, we investigated the activation of TRPV1 and TRPA1 by N-acyl homoserine lactones, quorum sensing molecules produced by Gram-negative bacteria, and the inhibitory effect of TRPV1 and TRPA1 by autoinducing peptides, quorum sensing molecules produced by Gram-positive bacteria, using human embryonic kidney 293T cell lines stably expressing human TRPV1 and TRPA1, respectively. As a result, we found that some N-acyl homoserine lactones, such as N-octanoyl-L-homoserine lactone (C8-HSL), N-nonanoyl-L-homoserine lactone (C9-HSL) and N-decanoyl-L-homoserine lactone (C10-HSL) activated both TRPV1 and TRPA1. In addition, we clarified that some N-acyl homoserine lactones, for example, N-3-oxo-dodecanoyl-L-homoserine lactone (3-oxo-C12-HSL) only activated TRPV1, and N-acyl homoserine lactones having saturated short acyl chain, such as N-acetyl-L-homoserine lactone (C2-HSL) and N-butyryl-L-homoserine lactone (C4-HSL) only activated TRPA1, respectively. Furthermore, we found that an autoinducing peptide, simple linear peptide CHWPR, inhibited both TRPV1 and TRPA1, and peptide having thiolactone ring DICNAYF, thiolactone ring were formed between C3 to F7, strongly inhibited only the TRPV1. Although the specificity of TRPV1 and TRPA1 for quorum sensing molecules were different, these data suggest that both TRPV1 and TRPA1 would function as receptors for quorum sensing molecule produced by bacteria.
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Affiliation(s)
- Naoya Tobita
- Tobacco Science Research Center, Japan Tobacco Inc., 6-2 Umegaoka, Aoba, Yokohama, Kanagawa, 227-8512, Japan
| | - Kana Tsuneto
- Tobacco Science Research Center, Japan Tobacco Inc., 6-2 Umegaoka, Aoba, Yokohama, Kanagawa, 227-8512, Japan
| | - Shigeaki Ito
- Scientific Product Assessment Center, Japan Tobacco Inc., 6-2 Umegaoka, Aoba, Yokohama, Kanagawa, 227-8512, Japan
| | - Takeshi Yamamoto
- Tobacco Science Research Center, Japan Tobacco Inc., 6-2 Umegaoka, Aoba, Yokohama, Kanagawa, 227-8512, Japan
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Cao X, Xin H, Zhang H, Liu J, Pan S, Du Y, Feng B, Quan Z, Guan L, Shen F, Liu Z, Wang D, Zhang B, Guan X, Yan J, Jin Q, Gao L. The Association Between Mycobacteria-Specific Antigen-Induced Cytokines and Host Response to Latent Tuberculosis Infection Treatment in a Chinese Population. Front Microbiol 2021; 12:716900. [PMID: 34484159 PMCID: PMC8415003 DOI: 10.3389/fmicb.2021.716900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 07/19/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives Exploring biomarkers monitoring latent tuberculosis infection (LTBI) treatment effectiveness would benefit optimizing the therapeutic regimen. This study aims to identify potential mycobacteria-specific antigen-induced cytokines associated with host responses to preventive treatment. Methods Based on a randomized controlled trial on LTBI treatment among individuals with chest radiography abnormalities suggestive of prior tuberculosis (TB), the dynamically changed cytokine levels in QuantiFERON-TB Gold In-Tube (QFT) supernatants were estimated during the treatment by bead-based multiplex assays and enzyme-linked immunosorbent assay. Results In total, 63 treated participants and 32 untreated controls were included in the study. The levels of 13 background-corrected mycobacteria-specific antigen-stimulated cytokines [basic fibroblast growth factor (FGF), growth-regulated oncogene (GRO)-α, interleukin (IL)-1α, IL-1ra, IL-12 (p70), stem cell factor (SCF), tumor necrosis factor-related apoptosis-inducing ligand (TRAIL), IL-8, interferon (IFN)-α2, IL-5, IL-12 (p40), leukemia inhibitory factor (LIF), and IL-17A] were found to be statistically different between before and after treatment in treated participants, while no statistically differences were observed in untreated controls. Among these 13 cytokines, the level of IL-8 was significantly lower in the QFT reversed group than that in the non-reversed group (p = 0.028) among treated participants, while such a difference was not found for untreated controls (p = 0.292). Conclusion Our results suggested that the lower level of mycobacteria-specific antigen-induced IL-8 might be associated with the host’s positive response to LTBI treatment.
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Affiliation(s)
- Xuefang Cao
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Henan Xin
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Haoran Zhang
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Jianmin Liu
- The Sixth People's Hospital of Zhengzhou, Zhengzhou, China
| | - Shouguo Pan
- The Center for Disease Prevention and Control of Zhongmu County, Zhengzhou, China
| | - Ying Du
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Boxuan Feng
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Zhusheng Quan
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ling Guan
- The Sixth People's Hospital of Zhengzhou, Zhengzhou, China
| | - Fei Shen
- The Sixth People's Hospital of Zhengzhou, Zhengzhou, China
| | - Zisen Liu
- The Center for Disease Prevention and Control of Zhongmu County, Zhengzhou, China
| | - Dakuan Wang
- The Center for Disease Prevention and Control of Zhongmu County, Zhengzhou, China
| | - Bin Zhang
- The Center for Disease Prevention and Control of Zhongmu County, Zhengzhou, China
| | - Xueling Guan
- The Sixth People's Hospital of Zhengzhou, Zhengzhou, China
| | - Jiaoxia Yan
- The Center for Disease Prevention and Control of Zhongmu County, Zhengzhou, China
| | - Qi Jin
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Lei Gao
- NHC Key Laboratory of Systems Biology of Pathogens, Center for Tuberculosis Research, Institute of Pathogen Biology, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
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Coates MS, Alton EWFW, Rapeport GW, Davies JC, Ito K. Pseudomonas aeruginosa induces p38MAP kinase-dependent IL-6 and CXCL8 release from bronchial epithelial cells via a Syk kinase pathway. PLoS One 2021; 16:e0246050. [PMID: 33524056 PMCID: PMC7850485 DOI: 10.1371/journal.pone.0246050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 01/12/2021] [Indexed: 01/02/2023] Open
Abstract
Pseudomonas aeruginosa (Pa) infection is a major cause of airway inflammation in immunocompromised and cystic fibrosis (CF) patients. Mitogen-activated protein (MAP) and tyrosine kinases are integral to inflammatory responses and are therefore potential targets for novel anti-inflammatory therapies. We have determined the involvement of specific kinases in Pa-induced inflammation. The effects of kinase inhibitors against p38MAPK, MEK 1/2, JNK 1/2, Syk or c-Src, a combination of a p38MAPK with Syk inhibitor, or a novel narrow spectrum kinase inhibitor (NSKI), were evaluated against the release of the proinflammatory cytokine/chemokine, IL-6 and CXCL8 from BEAS-2B and CFBE41o- epithelial cells by Pa. Effects of a Syk inhibitor against phosphorylation of the MAPKs were also evaluated. IL-6 and CXCL8 release by Pa were significantly inhibited by p38MAPK and Syk inhibitors (p<0.05). Phosphorylation of HSP27, but not ERK or JNK, was significantly inhibited by Syk kinase inhibition. A combination of p38MAPK and Syk inhibitors showed synergy against IL-6 and CXCL8 induction and an NSKI completely inhibited IL-6 and CXCL8 at low concentrations. Pa-induced inflammation is dependent on p38MAPK primarily, and Syk partially, which is upstream of p38MAPK. The NSKI suggests that inhibiting specific combinations of kinases is a potent potential therapy for Pa-induced inflammation.
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Affiliation(s)
- Matthew S. Coates
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- * E-mail:
| | - Eric W. F. W. Alton
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
| | - Garth W. Rapeport
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Pulmocide Ltd, London, United Kingdom
| | - Jane C. Davies
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Department of Paediatric Respiratory Medicine, Royal Brompton Hospital, London, United Kingdom
| | - Kazuhiro Ito
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Pulmocide Ltd, London, United Kingdom
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8
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Frey DL, Boutin S, Dittrich SA, Graeber SY, Stahl M, Wege S, Herth FJF, Sommerburg O, Schultz C, Mall MA, Dalpke AH. Relationship between airway dysbiosis, inflammation and lung function in adults with cystic fibrosis. J Cyst Fibros 2021; 20:754-760. [PMID: 33431308 DOI: 10.1016/j.jcf.2020.12.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 11/27/2020] [Accepted: 12/24/2020] [Indexed: 01/04/2023]
Abstract
Airway dysbiosis has been associated with lung disease severity in patients with cystic fibrosis (CF). However, the relationship between dysbiosis, airway inflammation and lung function impairement remains poorly understood. The aim of this study was therefore to determine how the structure of the sputum microbiota, airway inflammation markers and spirometry are related in patients with CF. Sputum samples were collected from 106 CF patients between 12 and 72 years. These were analyzed by 16S rRNA gene amplicon sequencing. Moreover, levels of pro-inflammatory cytokines (IL-1β, IL-8, IL-6 and TNF-α) and Neutrophil elastase (NE) were determined. The relationship between the microbiota, inflammation markers and forced expiratory volume in one second percent predicted (FEV1% predicted) was evaluated by multi-parameter analysis. The microbiota α-diversity correlated inverse with inflammation markers IL-1β, IL-8, TNF-α, NE and positively with FEV1% predicted. Patients could be divided into 7 clusters based on their microbiota structure. The most diverse cluster was defined by oropharyngeal-like flora (OF) while the others were characterized by the dominance of a single pathogen. Patients with the diverse OF microbiota cluster had lower sputum inflammatory markers and higher FEV1% predicted compared to patients with a pathogen-dominated microbiota including Pseudomonas aeruginosa. Our results suggest that the diversity of the airway microbiota is an important biomarker of the severity of airway inflammation linking dysbiosis to lung function decline in patients with CF.
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Affiliation(s)
- Dario L Frey
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Translational Pulmonology, University of Heidelberg, Heidelberg, Germany
| | - Sébastien Boutin
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Infectious Diseases, Medical Microbiology and Hygiene, University of Heidelberg, Heidelberg, Germany.
| | - Susanne A Dittrich
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Translational Pulmonology, University of Heidelberg, Heidelberg, Germany; Department of Pneumology and Critical Care Medicine, Thoraxklinik at the University Hospital Heidelberg, Heidelberg, Germany
| | - Simon Y Graeber
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Translational Pulmonology, University of Heidelberg, Heidelberg, Germany; Division of Pediatric Pulmonology & Allergology and Cystic Fibrosis Center, Department of Pediatrics, University of Heidelberg, Heidelberg, Germany; Department of Pediatric Pulmonology, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Charité-Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health (BIH), Berlin, Germany; German Center for Lung Research (DZL), associated partner site, Berlin, Germany
| | - Mirjam Stahl
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Translational Pulmonology, University of Heidelberg, Heidelberg, Germany; Division of Pediatric Pulmonology & Allergology and Cystic Fibrosis Center, Department of Pediatrics, University of Heidelberg, Heidelberg, Germany; Department of Pediatric Pulmonology, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Charité-Universitätsmedizin Berlin, Berlin, Germany; German Center for Lung Research (DZL), associated partner site, Berlin, Germany
| | - Sabine Wege
- Department of Pneumology and Critical Care Medicine, Thoraxklinik at the University Hospital Heidelberg, Heidelberg, Germany
| | - Felix J F Herth
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Pneumology and Critical Care Medicine, Thoraxklinik at the University Hospital Heidelberg, Heidelberg, Germany
| | - Olaf Sommerburg
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Division of Pediatric Pulmonology & Allergology and Cystic Fibrosis Center, Department of Pediatrics, University of Heidelberg, Heidelberg, Germany
| | - Carsten Schultz
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Chemical Physiology and Biochemistry, Oregon Health & Science University, Portland, OR, USA
| | - Marcus A Mall
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Translational Pulmonology, University of Heidelberg, Heidelberg, Germany; Division of Pediatric Pulmonology & Allergology and Cystic Fibrosis Center, Department of Pediatrics, University of Heidelberg, Heidelberg, Germany; Department of Pediatric Pulmonology, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Charité-Universitätsmedizin Berlin, Berlin, Germany; Berlin Institute of Health (BIH), Berlin, Germany; German Center for Lung Research (DZL), associated partner site, Berlin, Germany
| | - Alexander H Dalpke
- Translational Lung Research Center (TLRC), Heidelberg, Germany; Department of Infectious Diseases, Medical Microbiology and Hygiene, University of Heidelberg, Heidelberg, Germany; Institute of Medical Microbiology and Hygiene, Technische Universität Dresden, Dresden, Germany
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Hu R, Yuan K, Zhou J, Zhang Y, Zheng J, Zhao Y, Huang X, Jin X. Influence of Pseudomonas autoinducer N-3-oxododecanoyl homoserine lactone on human corneal epithelial cells. Exp Biol Med (Maywood) 2020; 246:426-435. [PMID: 33175611 DOI: 10.1177/1535370220969838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The quorum-sensing (QS) signaling-dependent extracellular virulence factors of Pseudomonas aeruginosa can cause infections such as P. aeruginosa keratitis. P. aeruginosa communicates by secreting and sensing small chemical molecules called autoinducers in QS system. The key QS signal molecule, N-3-oxododecanoyl-homoserine lactone (3OC12HSL), can affect the behavior of host cells and initiate immune response. In this report we investigated the influence of 3OC12HSL on human corneal epithelial cells (HCECs) and the mechanisms of 3OC12HSL on activated toll-like receptor 2 (TLR2)-dependent interleukin-8 (IL-8) secretion in HCECs. Cells were cultured under different concentrations of 3OC12HSL. Cell viability was assessed using Crystal violet staining and the cell counting kit-8 assay. We demonstrated the administration of 3OC12HSL decreased HCEC viability and survival in a concentration- and time-dependent manner. At high concentrations, 3OC12HSL rapidly promoted a time-dependent increase in the expressions of TLR2 and TLR4. It was found that the nuclear translocation and expression of nuclear factor-κB (NF-κB) were also increased in response to 3OC12HSL treatment. The significantly elevated expressions of TLR2, TLR4, and NF-κB, encouraged us to further test their mechanisms that cause inflammatory response. Among the inflammatory factors examined (IL-6, IL-8, IL-10, and TNF-α), we found that IL-8 was significantly increased after treatment with 3OC12HSL and its expression was inhibited when TLR2 was specifically blocked or silenced. These results indicated that the QS signaling molecule 3OC12HSL could be recognized by the host innate immune system in HCECs. This recognition then triggered an immune inflammatory response involving the activation of TLR2 and an increase in expression of IL-8. This crosstalk between 3OC12HSL and host immunity in HCECs contributes to the development and progression of P. aeruginosa keratitis.
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Affiliation(s)
- Renjian Hu
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Kelan Yuan
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Jie Zhou
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Yue Zhang
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Jiao Zheng
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Yingying Zhao
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Xiaodan Huang
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Xiuming Jin
- Eye Center, Affiliated Second Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
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10
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Airway Inflammation and Host Responses in the Era of CFTR Modulators. Int J Mol Sci 2020; 21:ijms21176379. [PMID: 32887484 PMCID: PMC7504341 DOI: 10.3390/ijms21176379] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 08/29/2020] [Accepted: 08/31/2020] [Indexed: 02/06/2023] Open
Abstract
The arrival of cystic fibrosis transmembrane conductance regulator (CFTR) modulators as a new class of treatment for cystic fibrosis (CF) in 2012 represented a pivotal advance in disease management, as these small molecules directly target the upstream underlying protein defect. Further advancements in the development and scope of these genotype-specific therapies have been transformative for an increasing number of people with CF (PWCF). Despite clear improvements in CFTR function and clinical endpoints such as lung function, body mass index (BMI), and frequency of pulmonary exacerbations, current evidence suggests that CFTR modulators do not prevent continued decline in lung function, halt disease progression, or ameliorate pathogenic organisms in those with established lung disease. Furthermore, it remains unknown whether their restorative effects extend to dysfunctional CFTR expressed in phagocytes and other immune cells, which could modulate airway inflammation. In this review, we explore the effects of CFTR modulators on airway inflammation, infection, and their influence on the impaired pulmonary host defences associated with CF lung disease. We also consider the role of inflammation-directed therapies in light of the widespread clinical use of CFTR modulators and identify key areas for future research.
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11
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Cabrini G, Rimessi A, Borgatti M, Lampronti I, Finotti A, Pinton P, Gambari R. Role of Cystic Fibrosis Bronchial Epithelium in Neutrophil Chemotaxis. Front Immunol 2020; 11:1438. [PMID: 32849500 PMCID: PMC7427443 DOI: 10.3389/fimmu.2020.01438] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 06/03/2020] [Indexed: 12/11/2022] Open
Abstract
A hallmark of cystic fibrosis (CF) chronic respiratory disease is an extensive neutrophil infiltrate in the mucosa filling the bronchial lumen, starting early in life for CF infants. The genetic defect of the CF Transmembrane conductance Regulator (CFTR) ion channel promotes dehydration of the airway surface liquid, alters mucus properties, and decreases mucociliary clearance, favoring the onset of recurrent and, ultimately, chronic bacterial infection. Neutrophil infiltrates are unable to clear bacterial infection and, as an adverse effect, contribute to mucosal tissue damage by releasing proteases and reactive oxygen species. Moreover, the rapid cellular turnover of lumenal neutrophils releases nucleic acids that further alter the mucus viscosity. A prominent role in the recruitment of neutrophil in bronchial mucosa is played by CF bronchial epithelial cells carrying the defective CFTR protein and are exposed to whole bacteria and bacterial products, making pharmacological approaches to regulate the exaggerated neutrophil chemotaxis in CF a relevant therapeutic target. Here we revise: (a) the major receptors, kinases, and transcription factors leading to the expression, and release of neutrophil chemokines in bronchial epithelial cells; (b) the role of intracellular calcium homeostasis and, in particular, the calcium crosstalk between endoplasmic reticulum and mitochondria; (c) the epigenetic regulation of the key chemokines; (d) the role of mutant CFTR protein as a co-regulator of chemokines together with the host-pathogen interactions; and (e) different pharmacological strategies to regulate the expression of chemokines in CF bronchial epithelial cells through novel drug discovery and drug repurposing.
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Affiliation(s)
- Giulio Cabrini
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy.,Department of Neurosciences, Biomedicine and Movement, University of Verona, Verona, Italy
| | - Alessandro Rimessi
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Monica Borgatti
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Ilaria Lampronti
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Alessia Finotti
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Paolo Pinton
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Roberto Gambari
- Center for Innovative Therapies in Cystic Fibrosis, University of Ferrara, Ferrara, Italy.,Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
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12
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Cai Y, Varasteh S, van Putten JPM, Folkerts G, Braber S. Mannheimia haemolytica and lipopolysaccharide induce airway epithelial inflammatory responses in an extensively developed ex vivo calf model. Sci Rep 2020; 10:13042. [PMID: 32747652 PMCID: PMC7400546 DOI: 10.1038/s41598-020-69982-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 07/20/2020] [Indexed: 01/27/2023] Open
Abstract
Pulmonary infection is associated with inflammation and damage to the bronchial epithelium characterized by an increase in the release of inflammatory factors and a decrease in airway barrier function. Our objective is to optimize a method for the isolation and culture of primary bronchial epithelial cells (PBECs) and to provide an ex vivo model to study mechanisms of epithelial airway inflammation. PBECs were isolated and cultured from the airways of calves in a submerged cell culture and liquid-liquid interface system. A higher yield and cell viability were obtained after stripping the epithelium from the bronchial section compared to cutting the bronchial section in smaller pieces prior to digestion. Mannheimia haemolytica and lipopolysaccharide (LPS) as stimulants increased inflammatory responses (IL-8, IL-6 and TNF-α release), possibly, by the activation of "TLR-mediated MAPKs and NF-κB" signaling. Furthermore, M. haemolytica and LPS disrupted the bronchial epithelial layer as observed by a decreased transepithelial electrical resistance and zonula occludens-1 and E-cadherin expression. An optimized isolation and culture method for calf PBECs was developed, which cooperated with animal use Replacement, Reduction and Refinement (3R's) principle, and can also contribute to the increased knowledge and development of effective therapies for other animal and humans (childhood) respiratory diseases.
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Affiliation(s)
- Yang Cai
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Soheil Varasteh
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Jos P M van Putten
- Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, The Netherlands
| | - Gert Folkerts
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Saskia Braber
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands.
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13
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Peignier A, Parker D. Pseudomonas aeruginosa Can Degrade Interferon λ, Thereby Repressing the Antiviral Response of Bronchial Epithelial Cells. J Interferon Cytokine Res 2020; 40:429-431. [PMID: 32672514 DOI: 10.1089/jir.2020.0057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Adeline Peignier
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, USA
| | - Dane Parker
- Department of Pathology, Immunology and Laboratory Medicine, Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, New Jersey, USA
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14
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Hoang TPT, Barthélemy M, Lami R, Stien D, Eparvier V, Touboul D. Annotation and quantification of N-acyl homoserine lactones implied in bacterial quorum sensing by supercritical-fluid chromatography coupled with high-resolution mass spectrometry. Anal Bioanal Chem 2020; 412:2261-2276. [PMID: 31919609 DOI: 10.1007/s00216-019-02265-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/31/2019] [Accepted: 11/07/2019] [Indexed: 10/25/2022]
Abstract
In recent years, use of supercritical-fluid chromatography (SFC) with CO2 as the mobile phase has been expanding in the research laboratory and industry since it is considered to be a green analytical method. This technique offers numerous advantages, such as good separation and sensitive detection, short analysis times, and stability of analytes. In this study, a method for quantification of N-acyl homoserine lactones (AHLs), signaling molecules responsible for cell-to-cell communication initially discovered in bacteria, by SFC coupled with high-resolution mass spectrometry (HRMS) was developed. The SFC conditions and MS ionization settings were optimized to obtain the best separation and greatest sensitivity. The optimal analysis conditions allowed quantification of up to 30 AHLs in a single run within 16 min with excellent linearity (R2 > 0.998) and sensitivity (picogram level). This method was then applied to study AHL production by one Gram-negative endophytic bacterium, Paraburkholderia sp. BSNB-0670. Nineteen known AHLs were detected, and nine abundant HSLs were quantified. To further investigate the production of uncommon AHLs, a molecular networking approach was applied on the basis of the SFC-HRMS/MS data. This led to additional identification of four unknown AHLs annotated as N-3-hydroxydodecanoylol homoserine lactone, N-3-hydroxydodecadienoyl homoserine lactone, and N-3-oxododecenoyl homoserine lactones (two isomers).
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Affiliation(s)
- Thi Phuong Thuy Hoang
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Morgane Barthélemy
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Raphaël Lami
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR3579, Observatoire Océanologique de Banyuls-sur-Mer, Avenue Pierre Fabre, 66650, Banyuls-sur-Mer, France
| | - Didier Stien
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologies Microbiennes, USR3579, Observatoire Océanologique de Banyuls-sur-Mer, Avenue Pierre Fabre, 66650, Banyuls-sur-Mer, France
| | - Véronique Eparvier
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France
| | - David Touboul
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Univ. Paris-Sud, Université Paris-Saclay, Avenue de la Terrasse, 91198, Gif-sur-Yvette, France.
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15
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Skopelja-Gardner S, Theprungsirikul J, Lewis KA, Hammond JH, Carlson KM, Hazlett HF, Nymon A, Nguyen D, Berwin BL, Hogan DA, Rigby WFC. Regulation of Pseudomonas aeruginosa-Mediated Neutrophil Extracellular Traps. Front Immunol 2019; 10:1670. [PMID: 31379861 PMCID: PMC6657737 DOI: 10.3389/fimmu.2019.01670] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 07/04/2019] [Indexed: 12/13/2022] Open
Abstract
Pseudomonas aeruginosa is the most prevalent opportunistic pathogen in the airways of cystic fibrosis (CF) patients. The pulmonary disorder is characterized by recurrent microbial infections and an exaggerated host inflammatory immune response led primarily by influx of neutrophils. Under these conditions, chronic colonization with P. aeruginosa is associated with diminished pulmonary function and increased morbidity and mortality. P. aeruginosa has a wide array of genetic mechanisms that facilitate its persistent colonization of the airway despite extensive innate host immune responses. Loss of function mutations in the quorum sensing regulatory gene lasR have been shown to confer survival advantage and a more pathogenic character to P. aeruginosa in CF patients. However, the strategies used by LasR-deficient P. aeruginosa to modulate neutrophil-mediated bactericidal functions are unknown. We sought to understand the role of LasR in P. aeruginosa-mediated neutrophil extracellular trap (NET) formation, an important anti-microbial mechanism deployed by neutrophils, the first-line responder in the infected airway. We observe mechanistic and phenotypic differences between NETs triggered by LasR-sufficient and LasR-deficient P. aeruginosa strains. We uncover that LasR-deficient P. aeruginosa strains fail to induce robust NET formation in both human and murine neutrophils, independently of bacterial motility or LPS expression. LasR does not mediate NET release via downstream quorum sensing signaling pathways but rather via transcriptional regulation of virulence factors, including, but not restricted to, LasB elastase and LasA protease. Finally, our studies uncover the differential requirements for NADPH oxidase in NET formation triggered by different P. aeruginosa strains.
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Affiliation(s)
- Sladjana Skopelja-Gardner
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Jomkuan Theprungsirikul
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Kimberley A Lewis
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - John H Hammond
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Kyrsten M Carlson
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Haley F Hazlett
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Amanda Nymon
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Dao Nguyen
- Department of Microbiology and Immunology, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Brent L Berwin
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - Deborah A Hogan
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
| | - William F C Rigby
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States.,Division of Rheumatology, Department of Medicine, Geisel School of Medicine at Dartmouth, Lebanon, NH, United States
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16
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Haque S, Yadav DK, Bisht SC, Yadav N, Singh V, Dubey KK, Jawed A, Wahid M, Dar SA. Quorum sensing pathways in Gram-positive and -negative bacteria: potential of their interruption in abating drug resistance. J Chemother 2019; 31:161-187. [DOI: 10.1080/1120009x.2019.1599175] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
- Gene Expression Laboratory, Department of Biosciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
| | - Dinesh K. Yadav
- Department of Botany, University of Allahabad, Allahabad, Uttar Pradesh, India
| | - Shekhar C. Bisht
- Department of Biotechnology, H.N.B Garhwal University, Srinagar, Uttarakhand, India
| | - Neelam Yadav
- Department of Botany, University of Allahabad, Allahabad, Uttar Pradesh, India
| | - Vineeta Singh
- Microbiology Division, CSIR-Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Kashyap Kumar Dubey
- Industrial Biotechnology Laboratory, University Institute of Engineering and Technology, M.D. University, Rohtak, Haryana, India
| | - Arshad Jawed
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
| | - Mohd Wahid
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
| | - Sajad Ahmad Dar
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
- Departments of Microbiology, University College of Medical Sciences (University of Delhi), Delhi, India
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17
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Alhazmi A. Spleen Tyrosine Kinase as a Target Therapy for Pseudomonas aeruginosa Infection. J Innate Immun 2018; 10:255-263. [PMID: 29925062 DOI: 10.1159/000489863] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2017] [Accepted: 04/29/2018] [Indexed: 12/11/2022] Open
Abstract
Spleen tyrosine kinase (SYK) is a nonreceptor tyrosine kinase which associates directly with extracellular receptors, and is critically involved in signal transduction pathways in a variety of cell types for the regulation of cellular responses. SYK is expressed ubiquitously in immune and nonimmune cells, and has a much wider biological role than previously recognized. Several studies have highlighted SYK as a key player in the pathogenesis of a multitude of diseases. Pseudomonas aeruginosa is an opportunistic gram-negative pathogen, which is responsible for systemic infections in immunocompromised individuals, accounting for a major cause of severe chronic lung infection in cystic fibrosis patients and subsequently resulting in a progressive deterioration of lung function. Inhibition of SYK activity has been explored as a therapeutic option in several allergic disorders, autoimmune diseases, and hematological malignancies. This review focuses on SYK as a therapeutic target, and describes the possibility of how current knowledge could be translated for therapeutic purposes to regulate the immune response to the opportunistic pathogen P. aeruginosa.
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Affiliation(s)
- Alaa Alhazmi
- Department of Biology, Lakehead University, Thunder Bay, Ontario, Canada.,Department of Medical Laboratory Technology, Jazan University, Jazan, Saudi Arabia
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18
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Bartlett JA, Ramachandran S, Wohlford-Lenane CL, Barker CK, Pezzulo AA, Zabner J, Welsh MJ, Meyerholz DK, Stoltz DA, McCray PB. Newborn Cystic Fibrosis Pigs Have a Blunted Early Response to an Inflammatory Stimulus. Am J Respir Crit Care Med 2018; 194:845-854. [PMID: 27027566 DOI: 10.1164/rccm.201510-2112oc] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
RATIONALE Studies suggest that inappropriate responses to proinflammatory stimuli might contribute to inflammation in cystic fibrosis (CF) lungs. However, technical challenges have made it difficult to distinguish whether altered responses in CF airways are an intrinsic defect or a secondary effect of chronic disease in their tissue of origin. The CF pig model provides an opportunity to study the inflammatory responses of CF airways at birth, before the onset of infection and inflammation. OBJECTIVES To test the hypothesis that acute inflammatory responses are perturbed in porcine CF airways. METHODS We investigated the inflammatory responses of newborn CF and non-CF pig airways following a 4-hour exposure to heat-killed Staphylococcus aureus, in vivo and in vitro. MEASUREMENTS AND MAIN RESULTS Following an in vivo S. aureus challenge, markers of inflammation were similar between CF and littermate control animals through evaluation of bronchoalveolar lavage and tissues. However, transcriptome analysis revealed genotype-dependent differences as CF pigs showed a diminished host defense response compared with their non-CF counterparts. Furthermore, CF pig airways exhibited an increase in apoptotic pathways and a suppression of ciliary and flagellar biosynthetic pathways. Similar differences were observed in cultured airway epithelia from CF and non-CF pigs exposed to the stimulus. CONCLUSIONS Transcriptome profiling suggests that acute inflammatory responses are dysregulated in the airways of newborn CF pigs.
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Affiliation(s)
| | | | | | | | | | | | - Michael J Welsh
- 2 Department of Internal Medicine.,3 Department of Molecular Physiology and Biophysics.,4 Howard Hughes Medical Institute, and
| | - David K Meyerholz
- 5 Department of Pathology, Carver College of Medicine, University of Iowa, Iowa City, Iowa
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19
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Schögler A, Blank F, Brügger M, Beyeler S, Tschanz SA, Regamey N, Casaulta C, Geiser T, Alves MP. Characterization of pediatric cystic fibrosis airway epithelial cell cultures at the air-liquid interface obtained by non-invasive nasal cytology brush sampling. Respir Res 2017; 18:215. [PMID: 29282053 PMCID: PMC5745630 DOI: 10.1186/s12931-017-0706-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 12/18/2017] [Indexed: 12/16/2022] Open
Abstract
Background In vitro systems of primary cystic fibrosis (CF) airway epithelial cells are an important tool to study molecular and functional features of the native respiratory epithelium. However, undifferentiated CF airway cell cultures grown under submerged conditions do not appropriately represent the physiological situation. A more advanced CF cell culture system based on airway epithelial cells grown at the air-liquid interface (ALI) recapitulates most of the in vivo-like properties but requires the use of invasive sampling methods. In this study, we describe a detailed characterization of fully differentiated primary CF airway epithelial cells obtained by non-invasive nasal brushing of pediatric patients. Methods Differentiated cell cultures were evaluated with immunolabelling of markers for ciliated, mucus-secreting and basal cells, and tight junction and CFTR proteins. Epithelial morphology and ultrastructure was examined by histology and transmission electron microscopy. Ciliary beat frequency was investigated by a video-microscopy approach and trans-epithelial electrical resistance was assessed with an epithelial Volt-Ohm meter system. Finally, epithelial permeability was analysed by using a cell layer integrity test and baseline cytokine levels where measured by an enzyme-linked immunosorbent assay. Results Pediatric CF nasal cultures grown at the ALI showed a differentiation into a pseudostratified epithelium with a mucociliary phenotype. Also, immunofluorescence analysis revealed the presence of ciliated, mucus-secreting and basal cells and tight junctions. CFTR protein expression was observed in CF (F508del/F508del) and healthy cultures and baseline interleukin (IL)-8 and IL-6 release were similar in control and CF ALI cultures. The ciliary beat frequency was 9.67 Hz and the differentiated pediatric CF epithelium was found to be functionally tight. Conclusion In summary, primary pediatric CF nasal epithelial cell cultures grown at the ALI showed full differentiation into ciliated, mucus-producing and basal cells, which adequately reflect the in vivo properties of the human respiratory epithelium. Electronic supplementary material The online version of this article (10.1186/s12931-017-0706-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Aline Schögler
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland
| | - Fabian Blank
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland
| | - Melanie Brügger
- Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland.,Institute of Virology and Immunology, Federal Department of Home Affairs, Mittelhäusern, Switzerland.,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - Seraina Beyeler
- Department of Clinical Research, University of Bern, Bern, Switzerland.,Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | | | | | - Carmen Casaulta
- Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland
| | - Thomas Geiser
- Department of Pulmonary Medicine, University Hospital of Bern, Bern, Switzerland
| | - Marco P Alves
- Department of Clinical Research, University of Bern, Bern, Switzerland. .,Division of Respiratory Medicine, University Children's Hospital of Bern, Bern, Switzerland. .,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland. .,Institute of Virology and Immunology, Federal Department of Home Affairs, Mittelhäusern, Switzerland. .,Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
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20
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Alhazmi A, Choi J, Ulanova M. Syk inhibitor R406 downregulates inflammation in an in vitro model of Pseudomonas aeruginosa infection. Can J Physiol Pharmacol 2017; 96:182-190. [PMID: 29020462 DOI: 10.1139/cjpp-2017-0307] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
As Pseudomonas aeruginosa infections are characterized by strong inflammation of infected tissues, anti-inflammatory therapies in combination with antibiotics have been considered for the treatment of associated diseases. Syk tyrosine kinase is an important regulator of inflammatory responses, and its specific inhibition was explored as a therapeutic option in several inflammatory conditions; however, this has not been studied in bacterial infections. We used a model of in vitro infection of human monocytic cell line THP-1 and lung epithelial cell line H292 with both wild-type and flagella-deficient mutant of P. aeruginosa strain K, as well as with clinical isolates from cystic fibrosis patients, to study the effect of a small molecule Syk inhibitor R406 on inflammatory responses induced by this pathogen. One-hour pretreatment of THP-1 cells with 10 μmol/L R406 resulted in a significant downregulation of the expression of the adhesion molecule ICAM-1, pro-inflammatory cytokines TNF-α and IL-1β, and phosphorylated signaling proteins ERK2, JNK, p-38, and IκBα, as well as significantly decreased TNF-α release by infected H292 cells. The results suggest that Syk is involved in the regulation of inflammatory responses to P. aeruginosa, and R406 may potentially be useful in dampening the damage caused by severe inflammation associated with this infection.
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Affiliation(s)
- Alaa Alhazmi
- a Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Joshua Choi
- b Northern Ontario School of Medicine, Thunder Bay, ON P7B 5E1, Canada
| | - Marina Ulanova
- a Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada.,b Northern Ontario School of Medicine, Thunder Bay, ON P7B 5E1, Canada
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21
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Guan X, Hou Y, Sun F, Yang Z, Li C. Dysregulated Chemokine Signaling in Cystic Fibrosis Lung Disease: A Potential Therapeutic Target. Curr Drug Targets 2017; 17:1535-44. [PMID: 26648071 DOI: 10.2174/1389450117666151209120516] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 10/27/2015] [Accepted: 10/28/2015] [Indexed: 12/26/2022]
Abstract
CF lung disease is characterized by a chronic and non-resolving activation of the innate immune system with excessive release of chemokines/cytokines including IL-8 and persistent infiltration of immune cells, mainly neutrophils, into the airways. Chronic infection and impaired immune response eventually lead to pulmonary damage characterized by bronchiectasis, emphysema, and lung fibrosis. As a complete knowledge of the pathways responsible for the exaggerated inflammatory response in CF lung disease is lacking, understanding these pathways could reveal new therapeutic targets, and lead to novel treatments. Therefore, there is a strong rationale for the identification of mechanisms and pathways underlying the exaggerated inflammatory response in CF lung disease. This article reviews the role of inflammation in the pathogenesis of CF lung disease, with a focus on the dysregulated signaling involved in the overexpression of chemokine IL-8 and excessive recruitment of neutrophils in CF airways. The findings suggest that targeting the exaggerated IL-8/IL-8 receptor (mainly CXCR2) signaling pathway in immune cells (especially neutrophils) may represent a potential therapeutic strategy for CF lung disease.
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Affiliation(s)
| | | | | | - Zhe Yang
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine. 540 E. Canfield Avenue, 5312 Scott Hall, Detroit, MI 48201, USA
| | - Chunying Li
- Department of Biochemistry and Molecular Biology, Wayne State University School of Medicine. 540 E. Canfield Avenue, 5312 Scott Hall, Detroit, MI 48201, USA
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22
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Utari PD, Vogel J, Quax WJ. Deciphering Physiological Functions of AHL Quorum Quenching Acylases. Front Microbiol 2017; 8:1123. [PMID: 28674525 PMCID: PMC5474475 DOI: 10.3389/fmicb.2017.01123] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/01/2017] [Indexed: 11/13/2022] Open
Abstract
N-Acylhomoserine lactone (AHL)-acylase (also known as amidase or amidohydrolase) is a class of enzyme that belongs to the Ntn-hydrolase superfamily. As the name implies, AHL-acylases are capable of hydrolysing AHLs, the most studied signaling molecules for quorum sensing in Gram-negative bacteria. Enzymatic degradation of AHLs can be beneficial in attenuating bacterial virulence, which can be exploited as a novel approach to fight infection of human pathogens, phytopathogens or aquaculture-related contaminations. Numerous acylases from both prokaryotic and eukaryotic sources have been characterized and tested for the interference of quorum sensing-regulated functions. The existence of AHL-acylases in a multitude of organisms from various ecological niches, raises the question of what the physiological roles of AHL-acylases actually are. In this review, we attempt to bring together recent studies to extend our understanding of the biological functions of these enzymes in nature.
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Affiliation(s)
- Putri D Utari
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
| | - Jan Vogel
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
| | - Wim J Quax
- Chemical and Pharmaceutical Biology Department, University of GroningenGroningen, Netherlands
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23
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Dosunmu EF, Emeh RO, Dixit S, Bakeer MK, Coats MT, Owen DR, Pillai SR, Singh SR, Dennis VA. The anti-microbial peptide TP359 attenuates inflammation in human lung cells infected with Pseudomonas aeruginosa via TLR5 and MAPK pathways. PLoS One 2017; 12:e0176640. [PMID: 28467446 PMCID: PMC5415104 DOI: 10.1371/journal.pone.0176640] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 04/13/2017] [Indexed: 11/19/2022] Open
Abstract
Pseudomonas aeruginosa infection induces vigorous inflammatory mediators secreted by epithelial cells, which do not necessarily eradicate the pathogen. Nonetheless, it reduces lung function due to significant airway damage, most importantly in cystic fibrosis patients. Recently, we published that TP359, a proprietary cationic peptide had potent bactericidal effects against P. aeruginosa, which were mediated by down-regulating its outer membrane biogenesis genes. Herein, we hypothesized that TP359 bactericidal effects could also serve to regulate P. aeruginosa-induced lung inflammation. We explored this hypothesis by infecting human A549 lung cells with live P. aeruginosa non-isogenic, mucoid and non-mucoid strains and assessed the capacity of TP359 to regulate the levels of elicited TNFα, IL-6 and IL-8 inflammatory cytokines. In all instances, the mucoid strain elicited higher concentrations of cytokines in comparison to the non-mucoid strain, and TP359 dose-dependently down-regulated their respective levels, suggesting its regulation of lung inflammation. Surprisingly, P. aeruginosa flagellin, and not its lipopolysaccharide moiety, was the primary inducer of inflammatory cytokines in lung cells, which were similarly down-regulated by TP359. Blocking of TLR5, the putative flagellin receptor, completely abrogated the capacity of infected lung cells to secrete cytokines, underscoring that TP359 regulates inflammation via the TLR5-dependent signaling pathway. Downstream pathway-specific inhibition studies further revealed that the MAPK pathway, essentially p38 and JNK are necessary for induction of P. aeruginosa elicited inflammatory cytokines and their down-regulation by TP359. Collectively, our data provides evidence to support exploring the relevancy of TP359 as an anti-microbial and anti-inflammatory agent against P. aeruginosa for clinical applications.
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Affiliation(s)
- Ejovwoke F. Dosunmu
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Robert O. Emeh
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Saurabh Dixit
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Mona K. Bakeer
- Lousiana State University Health Sciences Center, School of Allied Health Professions, New Orleans, Louisiana, United States of America
| | - Mamie T. Coats
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Donald R. Owen
- Therapeutic Peptides Inc., Baton Rouge, Louisiana, United States of America
| | - Shreekumar R. Pillai
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Shree R. Singh
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
| | - Vida A. Dennis
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, Alabama, United States of America
- * E-mail:
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Verbeke F, De Craemer S, Debunne N, Janssens Y, Wynendaele E, Van de Wiele C, De Spiegeleer B. Peptides as Quorum Sensing Molecules: Measurement Techniques and Obtained Levels In vitro and In vivo. Front Neurosci 2017; 11:183. [PMID: 28446863 PMCID: PMC5388746 DOI: 10.3389/fnins.2017.00183] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 03/20/2017] [Indexed: 12/12/2022] Open
Abstract
The expression of certain bacterial genes is regulated in a cell-density dependent way, a phenomenon called quorum sensing. Both Gram-negative and Gram-positive bacteria use this type of communication, though the signal molecules (auto-inducers) used by them differ between both groups: Gram-negative bacteria use predominantly N-acyl homoserine lacton (AHL) molecules (autoinducer-1, AI-1) while Gram-positive bacteria use mainly peptides (autoinducer peptides, AIP or quorum sensing peptides). These quorum sensing molecules are not only involved in the inter-microbial communication, but can also possibly cross-talk directly or indirectly with their host. This review summarizes the currently applied analytical approaches for quorum sensing identification and quantification with additionally summarizing the experimentally found in vivo concentrations of these molecules in humans.
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Affiliation(s)
- Frederick Verbeke
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Severine De Craemer
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Nathan Debunne
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Yorick Janssens
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Evelien Wynendaele
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
| | - Christophe Van de Wiele
- Department of Nuclear Medicine, AZ GroeningeKortrijk, Belgium.,Department of Nuclear Medicine and Radiology, Faculty of Medicine and Health Sciences, Ghent UniversityGhent, Belgium
| | - Bart De Spiegeleer
- Drug Quality and Registration Group, Faculty of Pharmaceutical Sciences, Ghent UniversityGhent, Belgium
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Interactions between Neutrophils and Pseudomonas aeruginosa in Cystic Fibrosis. Pathogens 2017; 6:pathogens6010010. [PMID: 28282951 PMCID: PMC5371898 DOI: 10.3390/pathogens6010010] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 03/03/2017] [Indexed: 12/23/2022] Open
Abstract
Cystic fibrosis (CF) affects 70,000 patients worldwide. Morbidity and mortality in CF is largely caused by lung complications due to the triad of impaired mucociliary clearance, microbial infections and chronic inflammation. Cystic fibrosis airway inflammation is mediated by robust infiltration of polymorphonuclear neutrophil granulocytes (PMNs, neutrophils). Neutrophils are not capable of clearing lung infections and contribute to tissue damage by releasing their dangerous cargo. Pseudomonas aeruginosa is an opportunistic pathogen causing infections in immunocompromised individuals. P. aeruginosa is a main respiratory pathogen in CF infecting most patients. Although PMNs are key to attack and clear P. aeruginosa in immunocompetent individuals, PMNs fail to do so in CF. Understanding why neutrophils cannot clear P. aeruginosa in CF is essential to design novel therapies. This review provides an overview of the antimicrobial mechanisms by which PMNs attack and eliminate P. aeruginosa. It also summarizes current advances in our understanding of why PMNs are incapable of clearing P. aeruginosa and how this bacterium adapts to and resists PMN-mediated killing in the airways of CF patients chronically infected with P. aeruginosa.
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Farhadi T, Ovchinnikov RS, Ranjbar MM. In silico designing of some agonists of toll-like receptor 5 as a novel vaccine adjuvant candidates. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s13721-016-0138-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Tao S, Luo Y, Bin He, Liu J, Qian X, Ni Y, Zhao R. Paraoxonase 2 modulates a proapoptotic function in LS174T cells in response to quorum sensing molecule N-(3-oxododecanoyl)-L-homoserine lactone. Sci Rep 2016; 6:28778. [PMID: 27364593 PMCID: PMC4929476 DOI: 10.1038/srep28778] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 06/08/2016] [Indexed: 12/14/2022] Open
Abstract
A mucus layer coats the gastrointestinal tract and serves as the first line of intestinal defense against infection. N-acyl-homoserine lactone (AHL) quorum-sensing molecules produced by gram-negative bacteria in the gut can influence the homeostasis of intestinal epithelium. In this study, we investigated the effects of two representative long- and short-chain AHLs, N-3-(oxododecanoyl)-homoserine lactone (C12-HSL) and N-butyryl homoserine lactone (C4-HSL), on cell viability and mucus secretion in LS174T cells. C12-HSL but not C4-HSL significantly decreased cell viability by inducing mitochondrial dysfunction and activating cell apoptosis which led to a decrease in mucin expression. Pretreatment with lipid raft disruptor (Methyl-β-cyclodextrin, MβCD) and oxidative stress inhibitor (N-acetyl-L-cysteine, NAC) slightly rescued the viability of cells damaged by C12-HSL exposure, while the paraoxonase 2 (PON2) inhibitor (Triazolo[4,3-a]quinolone, TQ416) significantly affected recovering cells viability and mucin secretion. When LS174T cells were treated with C12-HSL and TQ416 simultaneously, TQ416 showed the maximal positive effect on cells viability. However, if cells were first treated with C12-HSL for 40 mins, and then TQ46 was added, the TQ416 had no effect on cell viability. These results suggest that the C12-HSL-acid process acts at an early step to activate apoptosis as part of C12-HSL’s effect on intestinal mucus barrier function.
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Affiliation(s)
- Shiyu Tao
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yanwen Luo
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Bin He
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Jie Liu
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Xi Qian
- Department of Pathology and Laboratory Medicine, University of Vermont Medical Center, Burlington, VT 05452, USA
| | - Yingdong Ni
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Ruqian Zhao
- Key Laboratory of Animal Physiology &Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
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28
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Abstract
Chemical signaling between cells is an effective way to coordinate behavior within a community. Although cell-to-cell signaling has mostly been studied in single species, it is now appreciated that the sensing of chemical signals across kingdoms can be an important regulator of nutrient acquisition, virulence, and host defense. In this review, we focus on the role of interkingdom signaling in the interactions that occur between bacterial pathogens and their mammalian hosts. We discuss the quorum-sensing (QS) systems and other mechanisms used by these bacteria to sense, respond to, and modulate host signals that include hormones, immune factors, and nutrients. We also describe cross talk between these signaling pathways and strategies used by the host to interfere with bacterial signaling, highlighting the complex bidirectional signaling networks that are established across kingdoms.
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29
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Dauletbaev N, Das M, Cammisano M, Chen H, Singh S, Kooi C, Leigh R, Beaudoin T, Rousseau S, Lands LC. Rhinovirus Load Is High despite Preserved Interferon-β Response in Cystic Fibrosis Bronchial Epithelial Cells. PLoS One 2015; 10:e0143129. [PMID: 26599098 PMCID: PMC4658124 DOI: 10.1371/journal.pone.0143129] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 10/30/2015] [Indexed: 11/18/2022] Open
Abstract
Lung disease in cystic fibrosis (CF) is often exacerbated following acute upper respiratory tract infections caused by the human rhinovirus (HRV). Pathophysiology of these exacerbations is presently unclear and may involve deficient innate antiviral or exaggerated inflammatory responses in CF airway epithelial cells. Furthermore, responses of CF cells to HRV may be adversely affected by pre-exposure to virulence factors of Pseudomonas (P.) aeruginosa, the microorganism that frequently colonizes CF airways. Here we examined production of antiviral cytokine interferon-β and inflammatory chemokine interleukin-8, expression of the interferon-responsive antiviral gene 2'-5'-oligoadenylate synthetase 1 (OAS1), and intracellular virus RNA load in primary CF (delF508 CFTR) and healthy airway epithelial cells following inoculation with HRV16. Parallel cells were exposed to virulence factors of P. aeruginosa prior to and during HRV16 inoculation. CF cells exhibited production of interferon-β and interleukin-8, and expression of OAS1 at levels comparable to those in healthy cells, yet significantly higher HRV16 RNA load during early hours post-inoculation with HRV16. In line with this, HRV16 RNA load was higher in the CFBE41o- dF cell line overexpessing delF508 CFTR, compared with the isogenic control CFBE41o- WT (wild-type CFTR). Pre-exposure to virulence factors of P. aeruginosa did not affect OAS1 expression or HRV16 RNA load, but potentiated interleukin-8 production. In conclusion, CF cells demonstrate elevated HRV RNA load despite preserved interferon-β and OAS1 responses. High HRV load in CF airway epithelial cells appears to be due to deficiencies manifesting early during HRV infection, and may not be related to interferon-β.
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Affiliation(s)
- Nurlan Dauletbaev
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
- * E-mail:
| | - Mithun Das
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
| | - Maria Cammisano
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
| | - He Chen
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
| | - Sareen Singh
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
| | - Cora Kooi
- Department of Medicine and Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Richard Leigh
- Department of Medicine and Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Trevor Beaudoin
- Meakins-Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Simon Rousseau
- Meakins-Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Larry C. Lands
- Research Institute of McGill University Health Centre, Montreal, Quebec, Canada
- Respiratory Division, Montreal Children’s Hospital, Montreal, Quebec, Canada
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30
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Kanno E, Kawakami K, Miyairi S, Tanno H, Suzuki A, Kamimatsuno R, Takagi N, Miyasaka T, Ishii K, Gotoh N, Maruyama R, Tachi M. Promotion of acute-phase skin wound healing by Pseudomonas aeruginosa C 4 -HSL. Int Wound J 2015; 13:1325-1335. [PMID: 26471357 DOI: 10.1111/iwj.12523] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 08/31/2015] [Accepted: 09/20/2015] [Indexed: 11/27/2022] Open
Abstract
A Pseudomonas aeruginosa quorum-sensing system, which produces N-(3-oxododecanoyl)-l-homoserine lactone (3-oxo-C12 -HSL) and N-butanoyl-l-homoserine lactone (C4 -HSL), regulates the virulence factors. In our previous study, 3-oxo-C12 -HSL, encoded by lasI gene, was shown to promote wound healing. However, the effect of C4 -HSL, encoded by rhlI gene, remains to be elucidated. We addressed the effect of C4 -HSL on wounds in P. aeruginosa infection. Wounds were created on the backs of Sprague-Dawley SD rats, and P. aeruginosa PAO1 (PAO1) or its rhlI deletion mutant (ΔrhlI) or lasI deletion mutant (ΔlasI) was inoculated onto the wound. Rats were injected intraperitoneally with anti-C4 -HSL antiserum or treated with C4 -HSL at the wound surface. PAO1 inoculation led to significant acceleration of wound healing, which was associated with neutrophil infiltration and TNF-α synthesis. These responses were reversed, except for TNF-α production, when ΔrhlI was inoculated instead of PAO1 or when rats were co-treated with PAO1 and anti-C4 -HSL antiserum. In contrast, the healing process and neutrophil infiltration, but not TNF-α synthesis, were accelerated when C4 -HSL was administered in the absence of PAO1. This acceleration was not affected by anti-TNF-α antibody. These results suggest that C4 -HSL may be involved in the acceleration of acute wound healing in P. aeruginosa infection by modifying the neutrophilic inflammation.
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Affiliation(s)
- Emi Kanno
- Department of Science of Nursing Practice, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kazuyoshi Kawakami
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichi Miyairi
- Laboratory of Organic Chemistry, School of Pharmacy, Nihon University, Chiba, Japan
| | - Hiromasa Tanno
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Aiko Suzuki
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Rina Kamimatsuno
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naoyuki Takagi
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomomitsu Miyasaka
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keiko Ishii
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naomasa Gotoh
- Department of Microbiology and Infection Control Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Ryoko Maruyama
- Department of Science of Nursing Practice, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masahiro Tachi
- Department of Plastic and Reconstructive Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
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31
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Dixon EF, Hall RA. Noisy neighbourhoods: quorum sensing in fungal-polymicrobial infections. Cell Microbiol 2015; 17:1431-41. [PMID: 26243526 PMCID: PMC4973845 DOI: 10.1111/cmi.12490] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 06/26/2015] [Accepted: 07/17/2015] [Indexed: 02/06/2023]
Abstract
Quorum sensing was once considered a way in which a species was able to sense its cell density and regulate gene expression accordingly. However, it is now becoming apparent that multiple microbes can sense particular quorum-sensing molecules, enabling them to sense and respond to other microbes in their neighbourhood. Such interactions are significant within the context of polymicrobial disease, in which the competition or cooperation of microbes can alter disease progression. Fungi comprise a small but important component of the human microbiome and are in constant contact with bacteria and viruses. The discovery of quorum-sensing pathways in fungi has led to the characterization of a number of interkingdom quorum-sensing interactions. Here, we review the recent developments in quorum sensing in medically important fungi, and the implications these interactions have on the host's innate immune response.
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Affiliation(s)
- Emily F Dixon
- Institute of Microbiology and Infection, and School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Rebecca A Hall
- Institute of Microbiology and Infection, and School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
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32
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Chekabab SM, Silverman RJ, Lafayette SL, Luo Y, Rousseau S, Nguyen D. Staphylococcus aureus Inhibits IL-8 Responses Induced by Pseudomonas aeruginosa in Airway Epithelial Cells. PLoS One 2015; 10:e0137753. [PMID: 26360879 PMCID: PMC4567135 DOI: 10.1371/journal.pone.0137753] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 08/21/2015] [Indexed: 12/22/2022] Open
Abstract
Pseudomonas aeruginosa (PA) and Staphylococcus aureus (SA) are major respiratory pathogens and can concurrently colonize the airways of patients with chronic obstructive diseases, such as cystic fibrosis (CF). Airway epithelial cell signalling is critical to the activation of innate immune responses. In the setting of polymicrobial colonization or infection of the respiratory tract, how epithelial cells integrate different bacterial stimuli remains unknown. Our study examined the inflammatory responses to PA and SA co-stimulations. Immortalised airway epithelial cells (Beas-2B) exposed to bacteria-free filtrates from PA (PAF) induced a robust production of the neutrophil chemoattractant IL-8 while bacteria-free filtrates from SA (SAF) had a minimal effect. Surprisingly, co-stimulation with PAF+SAF demonstrated that SAF strongly inhibited the PAF-driven IL-8 production, showing that SAF has potent anti-inflammatory effects. Similarly SAF decreased IL-8 production induced by the TLR1/TLR2 ligand Pam3CysSK4 but not the TLR4 ligand LPS nor TLR5 ligand flagellin in Beas-2B cells. Moreover, SAF greatly dampened TLR1/TLR2-mediated activation of the NF-κB pathway, but not the p38 MAPK pathway. We observed this SAF-dependent anti-inflammatory activity in several SA clinical strains, as well as in the CF epithelial cell line CFBE41o-. These findings show a novel direct anti-inflammatory effect of SA on airway epithelial cells, highlighting its potential to modulate inflammatory responses in the setting of polymicrobial infections.
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Affiliation(s)
- Samuel M. Chekabab
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Richard J. Silverman
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Shantelle L. Lafayette
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Yishan Luo
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Simon Rousseau
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada
| | - Dao Nguyen
- Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
- Meakins Christie Laboratories, McGill University, Montreal, Quebec, Canada
- Department of Medicine, McGill University, Montreal, Quebec, Canada
- * E-mail:
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33
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LaFayette SL, Houle D, Beaudoin T, Wojewodka G, Radzioch D, Hoffman LR, Burns JL, Dandekar AA, Smalley NE, Chandler JR, Zlosnik JE, Speert DP, Bernier J, Matouk E, Brochiero E, Rousseau S, Nguyen D. Cystic fibrosis-adapted Pseudomonas aeruginosa quorum sensing lasR mutants cause hyperinflammatory responses. SCIENCE ADVANCES 2015; 1:e1500199. [PMID: 26457326 PMCID: PMC4597794 DOI: 10.1126/sciadv.1500199] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 06/06/2015] [Indexed: 05/23/2023]
Abstract
Cystic fibrosis lung disease is characterized by chronic airway infections with the opportunistic pathogen Pseudomonas aeruginosa and severe neutrophilic pulmonary inflammation. P. aeruginosa undergoes extensive genetic adaptation to the cystic fibrosis (CF) lung environment, and adaptive mutations in the quorum sensing regulator gene lasR commonly arise. We sought to define how mutations in lasR alter host-pathogen relationships. We demonstrate that lasR mutants induce exaggerated host inflammatory responses in respiratory epithelial cells, with increased accumulation of proinflammatory cytokines and neutrophil recruitment due to the loss of bacterial protease- dependent cytokine degradation. In subacute pulmonary infections, lasR mutant-infected mice show greater neutrophilic inflammation and immunopathology compared with wild-type infections. Finally, we observed that CF patients infected with lasR mutants have increased plasma interleukin-8 (IL-8), a marker of inflammation. These findings suggest that bacterial adaptive changes may worsen pulmonary inflammation and directly contribute to the pathogenesis and progression of chronic lung disease in CF patients.
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Affiliation(s)
- Shantelle L. LaFayette
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada
| | - Daniel Houle
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Trevor Beaudoin
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Gabriella Wojewodka
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Danuta Radzioch
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Lucas R. Hoffman
- Department of Microbiology, University of Washington, Seattle, WA 98195, USA
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Jane L. Burns
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Ajai A. Dandekar
- Department of Microbiology, University of Washington, Seattle, WA 98195, USA
| | - Nicole E. Smalley
- Department of Microbiology, University of Washington, Seattle, WA 98195, USA
| | | | - James E. Zlosnik
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - David P. Speert
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Joanie Bernier
- McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Elias Matouk
- McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Emmanuelle Brochiero
- Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, Quebec H2X 0A9, Canada
| | - Simon Rousseau
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Dao Nguyen
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec H3A 2B4, Canada
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
- McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
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Golpasha ID, Mousavi SF, Owlia P, Siadat SD, Irani S. Immunization with 3-oxododecanoyl-L-homoserine lactone-r-PcrV conjugate enhances survival of mice against lethal burn infections caused by Pseudomonas aeruginosa. Bosn J Basic Med Sci 2015; 15:15-24. [PMID: 26042508 DOI: 10.17305/bjbms.2015.292] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 02/04/2015] [Accepted: 02/08/2015] [Indexed: 01/22/2023] Open
Abstract
Quorum Sensing and type III secretion system play an important role in the virulence of Pseudomonas (P.) aeruginosa in burn wound infections. We aimed to explore the feasibility of using 3-oxo-C₁₂-HSL-r-PcrV conjugate as a candidate vaccine against P. aeruginosa caused infections. 3-oxo-C₁₂-HSL-r-PcrV conjugate was prepared and used for immunization of mice (10 μg, subcutaneous, three times, at 2-week intervals). Mice were divided into five groups: I: PcrV; II: 3-oxo-C₁₂-HSL-r-PcrV (10 μg); III: 3-oxo-C₁₂-HSL-r-PcrV (20 μg); IV: 3-oxo-C₁₂-HSL; and V: PBS receiving groups. After each shot of immunization, total and isotype antibody responses against corresponding antigen were measured to determine the immunization efficacy. One month after the last immunization, all groups were burned and challenged subeschar with P. aeruginosa PAO1. Survival rate and bacterial quantity in the skin and internal organs (liver and spleen) were evaluated 25-hr after burn infection. Immunization with 3-oxo-C₁₂-HSL-r-PcrV significantly increased total IgG and specific subclass antibodies (IgG₁, IgG₂a, IgG₂b, and IgM) in the serum of the groups II and III compared to the control group (p<0.001). While all the control mice (PBS injected group) died within 2 days after bacterial challenge, 64% of the group I, 78% of group II, and 86% of group III, survived within 14 days after challenge. Interestingly, bacterial burden in the liver and spleen of 3-oxo-C₁₂-HSL-r-PcrV injected group (III) was significantly lower than the control group (p<0.001). The present study proposed two-component vaccine to inhibit Pseudomonas infections in burned mouse.
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Affiliation(s)
- Isar Dejban Golpasha
- Department of Biology, Science and Research branch, Islamic Azad University, Tehran, Iran.
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Schwarzer C, Fu Z, Morita T, Whitt AG, Neely AM, Li C, Machen TE. Paraoxonase 2 serves a proapopotic function in mouse and human cells in response to the Pseudomonas aeruginosa quorum-sensing molecule N-(3-Oxododecanoyl)-homoserine lactone. J Biol Chem 2015; 290:7247-58. [PMID: 25627690 DOI: 10.1074/jbc.m114.620039] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Pseudomonas aeruginosa use quorum-sensing molecules, including N-(3-oxododecanoyl)-homoserine lactone (C12), for intercellular communication. C12 activated apoptosis in mouse embryo fibroblasts (MEF) from both wild type (WT) and Bax/Bak double knock-out mice (WT MEF and DKO MEF that were responsive to C12, DKOR MEF): nuclei fragmented; mitochondrial membrane potential (Δψmito) depolarized; Ca(2+) was released from the endoplasmic reticulum (ER), increasing cytosolic [Ca(2+)] (Cacyto); and caspase 3/7 was activated. DKOR MEF had been isolated from a nonclonal pool of DKO MEF that were non-responsive to C12 (DKONR MEF). RNAseq analysis, quantitative PCR, and Western blots showed that WT and DKOR MEF both expressed genes associated with cancer, including paraoxonase 2 (PON2), whereas DKONR MEF expressed little PON2. Adenovirus-mediated expression of human PON2 in DKONR MEF rendered them responsive to C12: Δψmito depolarized, Cacyto increased, and caspase 3/7 activated. Human embryonic kidney 293T (HEK293T) cells expressed low levels of endogenous PON2, and these cells were also less responsive to C12. Overexpression of PON2, but not PON2-H114Q (no lactonase activity) in HEK293T cells caused them to become sensitive to C12. Because [C12] may reach high levels in biofilms in lungs of cystic fibrosis (CF) patients, PON2 lactonase activity may control Δψmito, Ca(2+) release from the ER, and apoptosis in CF airway epithelia. Coupled with previous data, these results also indicate that PON2 uses its lactonase activity to prevent Bax- and Bak-dependent apoptosis in response to common proapoptotic drugs like doxorubicin and staurosporine, but activates Bax- and Bak-independent apoptosis in response to C12.
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Affiliation(s)
- Christian Schwarzer
- From the Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, California 94720-3200 and
| | - Zhu Fu
- From the Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, California 94720-3200 and
| | - Takeshi Morita
- From the Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, California 94720-3200 and
| | - Aaron G Whitt
- the Departments of Medicine, Pharmacology, and Toxicology, Molecular Targets Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky 40202
| | - Aaron M Neely
- the Departments of Medicine, Pharmacology, and Toxicology, Molecular Targets Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky 40202
| | - Chi Li
- the Departments of Medicine, Pharmacology, and Toxicology, Molecular Targets Program, James Graham Brown Cancer Center, University of Louisville, Louisville, Kentucky 40202
| | - Terry E Machen
- From the Department of Molecular and Cell Biology, University of California at Berkeley, Berkeley, California 94720-3200 and
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Adam D, Roux-Delrieu J, Luczka E, Bonnomet A, Lesage J, Mérol JC, Polette M, Abély M, Coraux C. Cystic fibrosis airway epithelium remodelling: involvement of inflammation. J Pathol 2014; 235:408-19. [DOI: 10.1002/path.4471] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 10/02/2014] [Accepted: 10/21/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Damien Adam
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
| | - Jacqueline Roux-Delrieu
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
| | - Emilie Luczka
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
| | - Arnaud Bonnomet
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
| | - Julien Lesage
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
| | | | - Myriam Polette
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
- Laboratory of Histology; University Hospital Centre; Reims France
| | - Michel Abély
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
- Pediatric Unit A, American Memorial Hospital; University Hospital Centre; Reims France
| | - Christelle Coraux
- INSERM UMR-S 903, SFR CAP-SANTE (FED 4231); University of Reims Champagne-Ardenne; Reims France
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Yousefi H, Ahmadiasl N, Alihemmati A, Habibi P. Effect of renal ischemia-reperfusion on lung injury and inflammatory responses in male rat. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2014; 17:802-7. [PMID: 25729551 PMCID: PMC4340990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 04/17/2014] [Indexed: 12/03/2022]
Abstract
OBJECTIVES Acute kidney injury (AKI), a syndrome characterized by decreased glomerular filtration, occurs in every 1 of 5 hospitalized patients. Renal ischemia-reperfusion, one of the main causes of AKI, is of particular importance in the setting of kidney transplantation. MATERIALS AND METHODS Sixty male rats were divided into four groups including control, nephrectomy, sham surgery and renal ischemia-reperfusion (IRI) group. The rats were anesthetized with intraperitonealketamin and xylazin. For making IRI group, right nephrectomywas performed, and after a week, the left kidney pedicle was occluded for 45 min for making ischemia that followed by 24 hr reperfusion. At the end of reperfusion phase, the lung tissues were isolated to be used in immunohistochemical and histological assays. Immunohistochemical assay was used to evaluate Bcl-2 and TNF-α, and hematoxylin-eosin staining assay was used to histopathology. RESULTS lung tissues injury after renal ischemia-reperfusion was revealed by immunohistochemistry analysis to increase TNF-α level and decrease Bcl-2 (an anti-apoptotic protein) level. Lung injury and necrosis was discovered by hematoxylin-eosin staining to be more evident in IRI group than sham and control groups. CONCLUSION The results demonstrated that increase in TNF-α and decrease in Bcl-2 levels in lungs induces the pulmonary inflammatory damage in renal IRI model.
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Affiliation(s)
- Hadi Yousefi
- Tuberculosis & Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Naser Ahmadiasl
- Tuberculosis & Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding author: Naser Ahmadiasl, Tuberculosis & Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. Tel: +98 411 3364664; Fax: +98 411 3364664;
| | - Alireza Alihemmati
- Department of Anatomy and Histology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parisa Habibi
- Tuberculosis & Lung Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Sewell A, Dunmire J, Wehmann M, Rowe T, Bouhenni R. Proteomic analysis of keratitis-associated Pseudomonas aeruginosa. Mol Vis 2014; 20:1182-91. [PMID: 25221424 PMCID: PMC4153424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Accepted: 08/27/2014] [Indexed: 11/17/2022] Open
Abstract
PURPOSE To compare the proteomic profile of a clinical isolate of Pseudomonas aeruginosa (P. aeruginosa) obtained from an infected cornea of a contact lens wearer and the laboratory strain P. aeruginosa ATCC 10145. METHODS Antibiotic sensitivity, motility, biofilm formation, and virulence tests were performed using standard methods. Whole protein lysates were analyzed with liquid chromatography/ tandem mass spectrometry (LC-MS/MS) in triplicate, and relative protein abundances were determined with spectral counting. The G test followed by a post hoc Holm-Sidak adjustment was used for the statistical analyses to determine significance in the differential expression of proteins between the two strains. RESULTS A total of 687 proteins were detected. One-hundred thirty-three (133) proteins were significantly different between the two strains. Among these, 13 were upregulated, and 16 were downregulated in the clinical strain compared to ATCC 10145, whereas 57 were detected only in the clinical strain. The upregulated proteins are associated with virulence and pathogenicity. CONCLUSIONS Proteins detected at higher levels in the clinical strain of P. aeruginosa were proteins known to be virulence factors. These results confirm that the keratitis-associated P. aeruginosa strain is pathogenic and expresses a higher number of virulence factors compared to the laboratory strain ATCC 10145. Identification of the protein profile of the corneal strain of P. aeruginosa in this study will aid in elucidating novel intervention strategies for reducing the burden of P. aeruginosa infection in keratitis.
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The ADP-ribosyltransferase domain of the effector protein ExoS inhibits phagocytosis of Pseudomonas aeruginosa during pneumonia. mBio 2014; 5:e01080-14. [PMID: 24917597 PMCID: PMC4056551 DOI: 10.1128/mbio.01080-14] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Pseudomonas aeruginosa is a Gram-negative pathogen commonly associated with nosocomial infections such as hospital-acquired pneumonia. It uses a type III secretion system to deliver effector proteins directly into the cytosol of host cells. Type III secretion in P. aeruginosa has been linked to severe disease and worse clinical outcomes in animal and human studies. The majority of P. aeruginosa strains secrete ExoS, a bifunctional toxin with GTPase-activating protein and ADP-ribosyltransferase activities. Numerous in vitro studies have investigated the targets and cellular effects of ExoS, linking both its enzymatic activities with inhibition of bacterial internalization. However, little is known about how this toxin facilitates the progression of infection in vivo. In this study, we used a mouse model to investigate the role of ExoS in inhibiting phagocytosis during pneumonia. We first confirmed previous findings that the ADP-ribosyltransferase activity of ExoS, but not the GTPase-activating protein activity, was responsible for bacterial persistence and decreased host survival in this model. We then used two distinct assays to demonstrate that ExoS inhibited phagocytosis during pneumonia. In contrast to the findings of several in vitro studies, this in vivo inhibition was also dependent on the ADP-ribosyltransferase activity, but not the GTPase-activating protein activity, of ExoS. These results demonstrate for the first time the antiphagocytic function of ExoS in the context of an actual infection and indicate that blocking the ADP-ribosyltransferase activity of ExoS may have potential therapeutic benefit. Pseudomonas aeruginosa is a major cause of hospital-acquired infections. To cause severe disease, this bacterium uses a type III secretion system that delivers four effector proteins, ExoS, ExoT, ExoU, and ExoY, into host cells. The majority of P. aeruginosa strains secrete ExoS, a bifunctional toxin with GTPase-activating protein and ADP-ribosyltransferase activities. In cell culture models, both enzymatic activities have been associated with decreased bacterial internalization. However, our study is the first to examine a role for ExoS in blocking phagocytosis in an animal model. We report that ExoS does inhibit phagocytosis during pneumonia. The ADP-ribosyltransferase activity, but not the GTPase-activating protein activity, of ExoS is necessary for this effect. Our findings highlight the ability of P. aeruginosa to manipulate the inflammatory response during pneumonia to facilitate bacterial survival.
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40
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Bowler LL, Ball TB, Saward LL. A novel in vitro co-culture system allows the concurrent analysis of mature biofilm and planktonic bacteria with human lung epithelia. J Microbiol Methods 2014; 101:49-55. [PMID: 24726869 DOI: 10.1016/j.mimet.2014.03.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/28/2014] [Accepted: 03/31/2014] [Indexed: 11/19/2022]
Abstract
Pseudomonas aeruginosa establishes chronic infections by forming biofilms; however studies of the virulence have focused on the planktonic form. Few in vitro co-culture models exist to study biofilm infections. We present a novel in vitro co-culture method examining the interactions between mature P. aeruginosa biofilms and human lung epithelial cells.
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Affiliation(s)
- Laura L Bowler
- University of Manitoba, Winnipeg, Manitoba, Canada; Cangene Corporation, Winnipeg, Manitoba, Canada.
| | - T Blake Ball
- University of Manitoba, Winnipeg, Manitoba, Canada; National HIV and Retrovirology Laboratories, Public Health Agency of Canada, Canada
| | - Laura L Saward
- University of Manitoba, Winnipeg, Manitoba, Canada; Cangene Corporation, Winnipeg, Manitoba, Canada
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41
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Schwarzer C, Ravishankar B, Patanwala M, Shuai S, Fu Z, Illek B, Fischer H, Machen TE. Thapsigargin blocks Pseudomonas aeruginosa homoserine lactone-induced apoptosis in airway epithelia. Am J Physiol Cell Physiol 2014; 306:C844-55. [PMID: 24598360 DOI: 10.1152/ajpcell.00002.2014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Pseudomonas aeruginosa secretes N-(3-oxododecanoyl)-homoserine lactone (C12) as a quorum-sensing molecule to regulate gene expression. Micromolar concentrations are found in the airway surface liquid of infected lungs. Exposure of the airway surface to C12 caused a loss of transepithelial resistance within 1 h that was accompanied by disassembly of tight junctions, as indicated by relocation of the tight junction protein zonula occludens 1 from the apical to the basolateral pole and into the cytosol of polarized human airway epithelial cell cultures (Calu-3 and primary tracheal epithelial cells). These effects were blocked by carbobenzoxy-valyl-alanyl-aspartyl-[O-methyl]-fluoromethylketone, a pan-caspase blocker, indicating that tight junction disassembly was an early event in C12-triggered apoptosis. Short-duration (10 min) pretreatment of airway epithelial (Calu-3 and JME) cells with 1 μM thapsigargin (Tg), an inhibitor of Ca(2+) uptake into the endoplasmic reticulum (ER), was found to be protective against the C12-induced airway epithelial barrier breakdown and also against other apoptosis-related effects, including shrinkage and fragmentation of nuclei, activation of caspase 3/7 (the executioner caspase in apoptosis), release of ER-targeted redox-sensitive green fluorescent protein into the cytosol, and depolarization of mitochondrial membrane potential. Pretreatment of Calu-3 airway cell monolayers with BAPTA-AM [to buffer cytosolic Ca(2+) concentration (Cacyto)] or Ca(2+)-free solution + BAPTA-AM reduced C12 activation of apoptotic events, suggesting that C12-triggered apoptosis may involve Ca(2+). Because C12 and Tg reduced Ca(2+) concentration in the ER and increased Cacyto, while Tg increased mitochondrial Ca(2+) concentration (Camito) and C12 reduced Camito, it is proposed that Tg may reduce C12-induced apoptosis in host cells not by raising Cacyto, but by preventing C12-induced decreases in Camito.
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Affiliation(s)
- Christian Schwarzer
- Department of Molecular and Cell Biology, University of California, Berkeley, California; and
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Park AJ, Murphy K, Krieger JR, Brewer D, Taylor P, Habash M, Khursigara CM. A temporal examination of the planktonic and biofilm proteome of whole cell Pseudomonas aeruginosa PAO1 using quantitative mass spectrometry. Mol Cell Proteomics 2014; 13:1095-105. [PMID: 24532839 DOI: 10.1074/mcp.m113.033985] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Chronic polymicrobial lung infections are the chief complication in patients with cystic fibrosis. The dominant pathogen in late-stage disease is Pseudomonas aeruginosa, which forms recalcitrant, structured communities known as biofilms. Many aspects of biofilm biology are poorly understood; consequently, effective treatment of these infections is limited, and cystic fibrosis remains fatal. Here we combined in-solution protein digestion of triplicate growth-matched samples with a high-performance mass spectrometry platform to provide the most comprehensive proteomic dataset known to date for whole cell P. aeruginosa PAO1 grown in biofilm cultures. Our analysis included protein-protein interaction networks and PseudoCAP functional information for unique and significantly modulated proteins at three different time points. Secondary analysis of a subgroup of proteins using extracted ion currents validated the spectral counting data of 1884 high-confidence proteins. In this paper we demonstrate a greater representation of proteins related to metabolism, DNA stability, and molecular activity in planktonically grown P. aeruginosa PAO1. In addition, several virulence-related proteins were increased during planktonic growth, including multiple proteins encoded by the pyoverdine locus, uncharacterized proteins with sequence similarity to mammalian cell entry protein, and a member of the hemagglutinin family of adhesins, HecA. Conversely, biofilm samples contained an uncharacterized protein with sequence similarity to an adhesion protein with self-association characteristics (AidA). Increased levels of several phenazine biosynthetic proteins, an uncharacterized protein with sequence similarity to a metallo-beta-lactamase, and lower levels of the drug target gyrA support the putative characteristics of in situ P. aeruginosa infections, including competitive fitness and antibiotic resistance. This quantitative whole cell approach advances the existing P. aeruginosa subproteomes and provides a framework for identifying and studying entire pathways critical to biofilm biology in this model pathogenic organism. The identification of novel protein targets could contribute to the development of much needed antimicrobial therapies to treat the chronic infections found in patients with cystic fibrosis.
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Affiliation(s)
- Amber J Park
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
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Schwarzer C, Fu Z, Shuai S, Babbar S, Zhao G, Li C, Machen TE. Pseudomonas aeruginosa homoserine lactone triggers apoptosis and Bak/Bax-independent release of mitochondrial cytochrome C in fibroblasts. Cell Microbiol 2014; 16:1094-104. [PMID: 24438098 DOI: 10.1111/cmi.12263] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 12/16/2013] [Accepted: 01/09/2014] [Indexed: 12/30/2022]
Abstract
Pseudomonas aeruginosa use N-(3-oxododecanoyl)-homoserine lactone (C12) as a quorum-sensing molecule to regulate gene expression in the bacteria. It is expected that in patients with chronic infections with P. aeruginosa, especially as biofilms, local [C12] will be high and, since C12 is lipid soluble, diffuse from the airways into the epithelium and underlying fibroblasts, capillary endothelia and white blood cells. Previous work showed that C12 has multiple effects in human host cells, including activation of apoptosis. The present work tested the involvement of Bak and Bax in C12-triggered apoptosis in mouse embryo fibroblasts (MEF) by comparing MEF isolated from embryos of wild-type (WT) and Bax(-/-) /Bak(-/-) (DKO) mice. In WT MEF C12 rapidly triggered (minutes to 2 h): activation of caspases 3/7 and 8, depolarization of mitochondrial membrane potential (Δψmito ), release of cytochrome C from mitochondria into the cytosol, blebbing of plasma membranes, shrinkage/condensation of cells and nuclei and, subsequently, cell killing. A DKO MEF line that was relatively unaffected by the Bak/Bax-dependent proapoptotic stimulants staurosporine and etoposide responded to C12 similarly to WT MEF: activation of caspase 3/7, depolarization of Δψmito and release of cytochrome C and cell death. Re-expression of Bax or Bak in DKO MEF did not alter the WT-like responses to C12 in DKO MEF. These data showed that C12 triggers novel, rapid proapoptotic Bak/Bax-independent responses that include events commonly associated with activation of both the intrinsic pathway (depolarization of Δψmito and release of cytochrome C from mitochondria into the cytosol) and the extrinsic pathway (activation of caspase 8). Unlike the proapoptotic agonists staurosporine and etoposide that release cytochrome C from mitochondria, C12's effects do not require participation of either Bak or Bax.
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Affiliation(s)
- Christian Schwarzer
- Department of Molecular and Cell Biology, University of California, Berkeley, CA, 94720-3200, USA
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Chai W, Zhang J, Duan Y, Pan D, Liu W, Li Y, Yan X, Chen B. Pseudomonas pyocyanin stimulates IL-8 expression through MAPK and NF-κB pathways in differentiated U937 cells. BMC Microbiol 2014; 14:26. [PMID: 24499192 PMCID: PMC3925954 DOI: 10.1186/1471-2180-14-26] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Accepted: 02/03/2014] [Indexed: 01/15/2023] Open
Abstract
Background Pyocyanin (PCN), an extracellular product of Pseudomonas aeruginosa and a blue redox active secondary metabolite, plays an important role in invasive pulmonary infection. However, the detailed inflammatory response triggered by PCN infection in inflammatory cells (particularly macrophages), if present, remains to be clarified. To investigate the effects of PCN on macrophages, the ability of PCN to induce inflammation reaction and the signaling pathway for IL-8 release in PCN-induced differentiated U937 cells were examined. Results It was found that PCN increased IL-8 release and mRNA expression in Phorbol 12-myristate 13-acetate (PMA) differentiated U937 cells in both a concentration- and time-dependent manner by reverse transcription-polymerase chain reaction (RT-PCR) and enzyme-linked immunosorbent assay (ELISA). P38 and ERK MAPKs were activated after 10 min of induction with PCN and their levels returned to baselines after 30 min by Western blotting. It was also found that within 10 min of PCN incubation, the level of p-I-κBα in the cytosol was increased, which returned to baseline level after 60 min. Meanwhile, the level of p-p65 was increased in the nuclear extract and cytosol, and maintained high in total cell lysates. The results were further confirmed by the observation that p38, ERK1/2 and NF-κB inhibitors inhibited PCN-induced NF-κB activation and attenuated PCN-induced IL-8 expression in U937 cells as a function of their concentrations. Moreover, it was shown that PCN induced oxidative stress in U937 cells and N-acetyl cysteine, an antioxidant, was able to inhibit PCN-induced IL-8 protein expression. Conclusions It is concluded that PCN induces IL-8 secretion and mRNA expression in PMA-differentiated U937 cells in a concentration- and time- dependent manner. Furthermore, p38 and ERK MAPKs and NF-κΒ signaling pathways may be involved in the expression of IL-8 in PCN-incubated PMA-differentiated U937 cells.
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Affiliation(s)
- Wenshu Chai
- Department of Respiratory Diseases, the First Affiliated Hospital of Liaoning Medical University, Jinzhou, Liaoning, 121001, China.
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Ortega-González M, Sánchez de Medina F, Molina-Santiago C, López-Posadas R, Pacheco D, Krell T, Martínez-Augustin O, Abdelali D. Fructooligosacharides reduce Pseudomonas aeruginosa PAO1 pathogenicity through distinct mechanisms. PLoS One 2014; 9:e85772. [PMID: 24465697 PMCID: PMC3899050 DOI: 10.1371/journal.pone.0085772] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 12/06/2013] [Indexed: 12/15/2022] Open
Abstract
Pseudomonas aeruginosa is ubiquitously present in the environment and acts as an opportunistic pathogen on humans, animals and plants. We report here the effects of the prebiotic polysaccharide inulin and its hydrolysed form FOS on this bacterium. FOS was found to inhibit bacterial growth of strain PAO1, while inulin did not affect growth rate or yield in a significant manner. Inulin stimulated biofilm formation, whereas a dramatic reduction of the biofilm formation was observed in the presence of FOS. Similar opposing effects were observed for bacterial motility, where FOS inhibited the swarming and twitching behaviour whereas inulin caused its stimulation. In co-cultures with eukaryotic cells (macrophages) FOS and, to a lesser extent, inulin reduced the secretion of the inflammatory cytokines IL-6, IL-10 and TNF-α. Western blot experiments indicated that the effects mediated by FOS in macrophages are associated with a decreased activation of the NF-κB pathway. Since FOS and inulin stimulate pathway activation in the absence of bacteria, the FOS mediated effect is likely to be of indirect nature, such as via a reduction of bacterial virulence. Further, this modulatory effect is observed also with the highly virulent ptxS mutated strain. Co-culture experiments of P. aeruginosa with IEC18 eukaryotic cells showed that FOS reduces the concentration of the major virulence factor, exotoxin A, suggesting that this is a possible mechanism for the reduction of pathogenicity. The potential of these compounds as components of antibacterial and anti-inflammatory cocktails is discussed.
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Affiliation(s)
- Mercedes Ortega-González
- Department of Biochemistry and Molecular Biology II, Centre of networked Biomedical Research about Hepatic and Digestive Diseases, School of Pharmacy, University of Granada, Granada, Spain
| | - Fermín Sánchez de Medina
- Departments of Pharmacology, Centre of networked Biomedical Research about Hepatic and Digestive Diseases, School of Pharmacy, University of Granada, Granada, Spain
| | - Carlos Molina-Santiago
- Department of Environmental Protection, Consejo Superior de Investigaciones Científicas, C/Profesor Albareda 1, Granada, Spain
| | - Rocío López-Posadas
- Departments of Pharmacology, Centre of networked Biomedical Research about Hepatic and Digestive Diseases, School of Pharmacy, University of Granada, Granada, Spain
| | - Daniel Pacheco
- Department of Environmental Protection, Consejo Superior de Investigaciones Científicas, C/Profesor Albareda 1, Granada, Spain
| | - Tino Krell
- Department of Environmental Protection, Consejo Superior de Investigaciones Científicas, C/Profesor Albareda 1, Granada, Spain
| | - Olga Martínez-Augustin
- Department of Biochemistry and Molecular Biology II, Centre of networked Biomedical Research about Hepatic and Digestive Diseases, School of Pharmacy, University of Granada, Granada, Spain
| | - Daddaoua Abdelali
- Department of Environmental Protection, Consejo Superior de Investigaciones Científicas, C/Profesor Albareda 1, Granada, Spain
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Azghani AO, Neal K, Idell S, Amaro R, Baker JW, Omri A, Pendurthi UR. Mechanism of fibroblast inflammatory responses to Pseudomonas aeruginosa elastase. MICROBIOLOGY-SGM 2014; 160:547-555. [PMID: 24385476 DOI: 10.1099/mic.0.075325-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Receptor tyrosine kinases, including the epidermal growth factor receptors (EGFR), are able to activate the mitogen-activated protein kinases (MAPK) via several adaptor proteins and protein kinases such as Raf. EGFR can be activated by a variety of extracellular stimuli including neutrophil elastase, but we are aware of no report as to whether Pseudomonas aeruginosa produced elastase (PE) could elicit such signalling through EGFR activation. We sought to test the inference that PE modulates inflammatory responses in human lung fibroblasts and that the process occurs by activation of the EGFR/MAPK pathways. We utilized IL-8 cytokine expression as a pathway-specific end point measure of the fibroblast inflammatory response to PE. Western blot analysis was performed to detect phosphorylation of EGFR and signal transduction intermediates. Northern blot, real-time PCR, and ELISA methods were utilized to determine cytokine gene expression levels. We found that PE induces phosphorylation of the EGFR and the extracellular signal-regulated proteins (ERK1/2) of the MAPK pathway, and nuclear translocation of NF-κB. Furthermore, enzymically active PE enhances IL-8 mRNA and protein secretion. Pretreatment of the cells with specific inhibitors of EGFR, MAPK kinase and NF-κB markedly attenuated the PE-induced signal proteins phosphorylation and IL-8 gene expression and protein secretion. Collectively, the data show that PE produced by Pseudomonas aeruginosa can modulate lung inflammation by exploiting the EGFR/ERK signalling cascades and enhancing IL-8 production in the lungs via NF-κB activation.
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Affiliation(s)
- Ali O Azghani
- Department of Biology, University of Texas at Tyler, Tyler, TX, USA
| | - Kourtney Neal
- Department of Biology, University of Texas at Tyler, Tyler, TX, USA
| | - Steven Idell
- Department of Cellular and Molecular Biology and Texas Lung Injury Institute, University of Texas Health Science Center at Tyler, Tyler, TX, USA
| | - Rodolfo Amaro
- Department of Pediatric Pulmonology, University of Texas Health Science Center at Tyler, Tyler, TX, USA
| | - Jason W Baker
- Program in Environmental and Earth Sciences, University of Texas at Arlington, Arlington, TX, USA
| | - Abdelwahab Omri
- Department of Chemistry and Biochemistry, Laurentian University, Sudbury, ON, Canada
| | - Usha R Pendurthi
- Department of Cellular and Molecular Biology and Texas Lung Injury Institute, University of Texas Health Science Center at Tyler, Tyler, TX, USA
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Kim YJ, Paek SH, Jin S, Park BS, Ha UH. A novel Pseudomonas aeruginosa-derived effector cooperates with flagella to mediate the upregulation of interleukin 8 in human epithelial cells. Microb Pathog 2013; 66:24-8. [PMID: 24361345 DOI: 10.1016/j.micpath.2013.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 12/05/2013] [Accepted: 12/09/2013] [Indexed: 02/06/2023]
Abstract
Infection with Pseudomonas aeruginosa results in a massive accumulation of neutrophils in response to prolonged and sustained expression of inflammatory mediators. The major chemokine associated with this excessive neutrophil recruitment is IL-8, the accumulation of which is a hallmark of cornea and cystic fibrosis airway inflammation. To date, several P. aeruginosa-associated and extracellular factors required for the stimulation of IL-8 expression have been identified. Here, we report a novel effector molecule, nucleoside diphosphate kinase (Ndk), which increases the expression of IL-8 by translocating into host cells. The induction appears to be dependent on both the kinase activity of Ndk and an additional bacterial factor, flagellin, via an NF-κB signaling pathway. This study demonstrates the role of a novel effector, Ndk, which is capable of inducing prominent inflammatory chemokine IL-8 expression with the aid of flagellin during P. aeruginosa infection.
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Affiliation(s)
- Yong-Jae Kim
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 339-700, Republic of Korea
| | - Se-Hwan Paek
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 339-700, Republic of Korea
| | - Shouguang Jin
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, FL 32610, USA
| | - Beom Seok Park
- Department of Biomedical Laboratory Science, Eulji University, Seongnam 461-713, Republic of Korea.
| | - Un-Hwan Ha
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 339-700, Republic of Korea.
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Bein K, Di Giuseppe M, Mischler SE, Ortiz LA, Leikauf GD. LPS-treated macrophage cytokines repress surfactant protein-B in lung epithelial cells. Am J Respir Cell Mol Biol 2013; 49:306-15. [PMID: 23590297 PMCID: PMC3824031 DOI: 10.1165/rcmb.2012-0283oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 03/07/2013] [Indexed: 02/04/2023] Open
Abstract
In the mouse lung, Escherichia coli LPS can decrease surfactant protein-B (SFTPB) mRNA and protein concentrations. LPS also regulates the expression, synthesis, and concentrations of a variety of gene and metabolic products that inhibit SFTPB gene expression. The purpose of the present study was to determine whether LPS acts directly or indirectly on pulmonary epithelial cells to trigger signaling pathways that inhibit SFTPB expression, and whether the transcription factor CCAAT/enhancer binding protein (C/EBP)-β (CEBPB) is a downstream inhibitory effector. To investigate the mechanism of SFTPB repression, the human pulmonary epithelial cell lines NCI-H441 (H441) and NCI-H820 (H820) and the mouse macrophage-like cell line RAW264.7 were treated with LPS. Whereas LPS did not decrease SFTPB transcripts in H441 or H820 cells, the conditioned medium of LPS-treated RAW264.7 cells decreased SFTPB transcripts in H441 and H820 cells, and inhibited SFTPB promoter activity in H441 cells. In the presence of neutralizing anti-tumor necrosis factor (TNF) antibodies, the conditioned medium of LPS-treated RAW264.7 cells did not inhibit SFTPB promoter activity. In H441 cells treated with recombinant TNF protein, SFTPB transcripts decreased, whereas CEBPB transcripts increased and the transient coexpression of CEBPB decreased SFTPB promoter activity. Further, CEBPB short, interfering RNA increased basal SFTPB transcripts and countered the decrease of SFTPB transcripts by TNF. Together, these findings suggest that macrophages participate in the repression of SFTPB expression by LPS, and that macrophage-released cytokines (including TNF) regulate the transcription factor CEBPB, which can function as a downstream transcriptional repressor of SFTPB gene expression in pulmonary epithelial cells.
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Affiliation(s)
- Kiflai Bein
- Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15219-3130, USA.
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Stigliani M, Aquino RP, Del Gaudio P, Mencherini T, Sansone F, Russo P. Non-steroidal anti-inflammatory drug for pulmonary administration: Design and investigation of ketoprofen lysinate fine dry powders. Int J Pharm 2013; 448:198-204. [DOI: 10.1016/j.ijpharm.2013.03.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 03/15/2013] [Accepted: 03/16/2013] [Indexed: 11/25/2022]
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Kanno E, Kawakami K, Miyairi S, Tanno H, Otomaru H, Hatanaka A, Sato S, Ishii K, Hayashi D, Shibuya N, Imai Y, Gotoh N, Maruyama R, Tachi M. Neutrophil-derived tumor necrosis factor-α contributes to acute wound healing promoted by N-(3-oxododecanoyl)-l-homoserine lactone from Pseudomonas aeruginosa. J Dermatol Sci 2013; 70:130-8. [DOI: 10.1016/j.jdermsci.2013.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 12/29/2012] [Accepted: 01/18/2013] [Indexed: 11/25/2022]
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