1
|
Wu M, Chen JH. CFTR dysfunction leads to defective bacterial eradication on cystic fibrosis airways. Front Physiol 2024; 15:1385661. [PMID: 38699141 PMCID: PMC11063615 DOI: 10.3389/fphys.2024.1385661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/04/2024] [Indexed: 05/05/2024] Open
Abstract
Dysfunction of the cystic fibrosis transmembrane conductance regulator (CFTR) anion channel by genetic mutations causes the inherited disease cystic fibrosis (CF). CF lung disease that involves multiple disorders of epithelial function likely results from loss of CFTR function as an anion channel conducting chloride and bicarbonate ions and its function as a cellular regulator modulating the activity of membrane and cytosol proteins. In the absence of CFTR activity, abundant mucus accumulation, bacterial infection and inflammation characterize CF airways, in which inflammation-associated tissue remodeling and damage gradually destroys the lung. Deciphering the link between CFTR dysfunction and bacterial infection in CF airways may reveal the pathogenesis of CF lung disease and guide the development of new treatments. Research efforts towards this goal, including high salt, low volume, airway surface liquid acidosis and abnormal mucus hypotheses are critically reviewed.
Collapse
Affiliation(s)
| | - Jeng-Haur Chen
- College of Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang, China
| |
Collapse
|
2
|
Geitani R, Moubareck CA, Costes F, Marti L, Dupuis G, Sarkis DK, Touqui L. Bactericidal effects and stability of LL-37 and CAMA in the presence of human lung epithelial cells. Microbes Infect 2021; 24:104928. [PMID: 34954126 DOI: 10.1016/j.micinf.2021.104928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/17/2022]
Abstract
Cationic antimicrobial peptides (CAMPs) are important actors in host innate immunity and represent a promising alternative to combat antibiotic resistance. Here, the bactericidal activity of two CAMPs (LL-37, and CAMA) was evaluated against Pseudomonas aeruginosa (PA) in the presence of IB3-1 cells, a cell line derived from patients with cystic fibrosis. The two CAMPs exerted different effects on PA survival depending on the timing of their administration. We observed a greater bactericidal effect when IB3-1 cells were pretreated with sub-minimum bactericidal concentrations (Sub-MBCs) of the CAMPs prior to infection. These findings suggest that CAMPs induce the production of factors by IB3-1 cells that improve their bactericidal action. However, we observed no bactericidal effect when supra-minimum bactericidal concentrations (Supra-MBCs) of the CAMPs were added to IB3-1 cells at the same time or after infection. Western-blot analysis showed a large decrease in LL-37 levels in supernatants of infected IB3-1 cells and an increase in LL-37 binding to these cells after LL-37 administration. LL-37 induced a weak inflammatory response in the cells without being toxic. In conclusion, our findings suggest a potential prophylactic action of CAMPs. The bactericidal effects were low when the CAMPs were added after cell infection, likely due to degradation of CAMPs by bacterial or epithelial cell proteases and/or due to adherence of CAMPs to cells becoming less available for direct bacterial killing.
Collapse
Affiliation(s)
- Regina Geitani
- Microbiology Laboratory, School of Pharmacy, Saint Joseph University, Beirut, Lebanon.
| | - Carole Ayoub Moubareck
- Microbiology Laboratory, School of Pharmacy, Saint Joseph University, Beirut, Lebanon; College of Natural and Health Sciences, Zayed University, Dubai, United Arab Emirates
| | - Floriane Costes
- "Sorbonne Université", INSERM UMR_S 938, "Centre de Recherche Saint-Antoine" (CRSA), Paris, France; "Mucoviscidose and Bronchopathies Chroniques", Department "Santé Globale", Pasteur Institute, Paris, France
| | - Léa Marti
- "Sorbonne Université", INSERM UMR_S 938, "Centre de Recherche Saint-Antoine" (CRSA), Paris, France; "Mucoviscidose and Bronchopathies Chroniques", Department "Santé Globale", Pasteur Institute, Paris, France
| | - Gabrielle Dupuis
- "Sorbonne Université", INSERM UMR_S 938, "Centre de Recherche Saint-Antoine" (CRSA), Paris, France; "Mucoviscidose and Bronchopathies Chroniques", Department "Santé Globale", Pasteur Institute, Paris, France
| | - Dolla Karam Sarkis
- Microbiology Laboratory, School of Pharmacy, Saint Joseph University, Beirut, Lebanon
| | - Lhousseine Touqui
- "Sorbonne Université", INSERM UMR_S 938, "Centre de Recherche Saint-Antoine" (CRSA), Paris, France; "Mucoviscidose and Bronchopathies Chroniques", Department "Santé Globale", Pasteur Institute, Paris, France.
| |
Collapse
|
3
|
Vidaillac C, Chotirmall SH. Pseudomonas aeruginosa in bronchiectasis: infection, inflammation, and therapies. Expert Rev Respir Med 2021; 15:649-662. [PMID: 33736539 DOI: 10.1080/17476348.2021.1906225] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Introduction: Bronchiectasis is a chronic endobronchial suppurative disease characterized by irreversibly dilated bronchi damaged by repeated polymicrobial infections and predominantly, neutrophilic airway inflammation. Some consider bronchiectasis a syndromic consequence of several different causes whilst others view it as an individual disease entity. In most patients, identifying an underlying cause remains challenging. The acquisition and colonization of affected airways by Pseudomonas aeruginosa represent a critical and adverse clinical consequence for its progression and management.Areas covered: In this review, we outline clinical and pre-clinical peer-reviewed research published in the last 5 years, focusing on the pathogenesis of bronchiectasis and the role of P. aeruginosa and its virulence in shaping host inflammatory and immune responses in the airway. We further detail its role in airway infection, the lung microbiome, and address therapeutic options in bronchiectasis.Expert opinion: P. aeruginosa represents a key pulmonary pathogen in bronchiectasis that causes acute and/or chronic airway infection. Eradication can prevent adverse clinical consequence and/or disease progression. Novel therapeutic strategies are emerging and include combination-based approaches. Addressing airway infection caused by P. aeruginosa in bronchiectasis is necessary to prevent airway damage, loss of lung function and exacerbations, all of which contribute to adverse clinical outcome.
Collapse
Affiliation(s)
- Celine Vidaillac
- Oxford University Clinical Research Unit, University of Oxford, Ho Chi Minh City, Vietnam.,Center for Tropical Medicine and Global Health, University of Oxford, Oxford, UK
| | - Sanjay H Chotirmall
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| |
Collapse
|
4
|
Wheelock CE, Strandvik B. Abnormal n-6 fatty acid metabolism in cystic fibrosis contributes to pulmonary symptoms. Prostaglandins Leukot Essent Fatty Acids 2020; 160:102156. [PMID: 32750662 DOI: 10.1016/j.plefa.2020.102156] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/24/2020] [Accepted: 06/24/2020] [Indexed: 01/09/2023]
Abstract
Cystic fibrosis (CF) is a recessively inherited fatal disease that is the subject of extensive research and ongoing development of therapeutics targeting the defective protein, cystic fibrosis transmembrane conductance regulator (CFTR). Despite progress, the link between CFTR and clinical symptoms is incomplete. The severe CF phenotypes are associated with a deficiency of linoleic acid, which is the precursor of arachidonic acid. The release of arachidonic acid from membranes via phospholipase A2 is the rate-limiting step for eicosanoid synthesis and is increased in CF, which contributes to the observed inflammation. A potential deficiency of docosahexaenoic acid may lead to decreased levels of specialized pro-resolving mediators. This pathophysiology may contribute to an early and sterile inflammation, mucus production, and to bacterial colonization, which further increases inflammation and potentiates the clinical symptoms. Advances in lipid technology will assist in elucidating the role of lipid metabolism in CF, and stimulate therapeutic modulations of inflammation.
Collapse
Affiliation(s)
- Craig E Wheelock
- Division of Physiological Chemistry 2, Dept of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Birgitta Strandvik
- Dept of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
| |
Collapse
|
5
|
Mitri C, Xu Z, Bardin P, Corvol H, Touqui L, Tabary O. Novel Anti-Inflammatory Approaches for Cystic Fibrosis Lung Disease: Identification of Molecular Targets and Design of Innovative Therapies. Front Pharmacol 2020; 11:1096. [PMID: 32848733 PMCID: PMC7396676 DOI: 10.3389/fphar.2020.01096] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/06/2020] [Indexed: 12/19/2022] Open
Abstract
Cystic fibrosis (CF) is the most common genetic disorder among Caucasians, estimated to affect more than 70,000 people in the world. Severe and persistent bronchial inflammation and chronic bacterial infection, along with airway mucus obstruction, are hallmarks of CF lung disease and participate in its progression. Anti-inflammatory therapies are, therefore, of particular interest for CF lung disease. Furthermore, a better understanding of the molecular mechanisms involved in airway infection and inflammation in CF has led to the development of new therapeutic approaches that are currently under evaluation by clinical trials. These new strategies dedicated to CF inflammation are designed to treat different dysregulated aspects such as oxidative stress, cytokine secretion, and the targeting of dysregulated pathways. In this review, we summarize the current understanding of the cellular and molecular mechanisms that contribute to abnormal lung inflammation in CF, as well as the new anti-inflammatory strategies proposed to CF patients by exploring novel molecular targets and novel drug approaches.
Collapse
Affiliation(s)
- Christie Mitri
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| | - Zhengzhong Xu
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France.,Yangzhou University, Yangzhou, China
| | - Pauline Bardin
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| | - Harriet Corvol
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France.,Département de Pédiatrie Respiratoire, Hôpital Trousseau, AP-HP, Paris, France
| | - Lhousseine Touqui
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France.,Equipe Mucoviscidose et Bronchopathies Chroniques, Département Santé Globale, Institut Pasteur, Paris, France
| | - Olivier Tabary
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, Paris, France
| |
Collapse
|
6
|
Exendin-4 restores airway mucus homeostasis through the GLP1R-PKA-PPARγ-FOXA2-phosphatase signaling. Mucosal Immunol 2020; 13:637-651. [PMID: 32034274 PMCID: PMC7664156 DOI: 10.1038/s41385-020-0262-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 01/03/2020] [Accepted: 01/21/2020] [Indexed: 02/04/2023]
Abstract
Goblet cell hyperplasia and metaplasia and excessive mucus are prominent pathologies of chronic airway diseases such as chronic obstructive pulmonary disease (COPD), cystic fibrosis (CF), and chronic bronchitis. Chronic infection by respiratory pathogens, including Pseudomonas aeruginosa, exacerbates cyclical proinflammatory responses and mucus hypersecretion. P. aeruginosa and its virulence factor pyocyanin contribute to these pathologies by inhibiting FOXA2, a key transcriptional regulator of mucus homeostasis, through activation of antagonistic signaling pathways EGFR-AKT/ERK1/2 and IL-4/IL-13-STAT6-SPDEF. However, FOXA2-targeted therapy has not been previously explored. Here, we examined the feasibility of repurposing the incretin mimetic Exendin-4 to restore FOXA2-mediated airway mucus homeostasis. We have found that Exendin-4 restored FOXA2 expression, attenuated mucin production in COPD and CF-diseased airway cells, and reduced mucin and P. aeruginosa burden in mouse lungs. Mechanistically, Exendin-4 activated the GLP1R-PKA-PPAR-γ-dependent phosphatases PTEN and PTP1B, which inhibited key kinases within both EGFR and STAT6 signaling cascades. Our results may lead to the repurposing of Exendin-4 and other incretin mimetics to restore FOXA2 function and ultimately regulate excessive mucus in diseased airways.
Collapse
|
7
|
Choi W, Choe S, Lau GW. Inactivation of FOXA2 by Respiratory Bacterial Pathogens and Dysregulation of Pulmonary Mucus Homeostasis. Front Immunol 2020; 11:515. [PMID: 32269574 PMCID: PMC7109298 DOI: 10.3389/fimmu.2020.00515] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 03/06/2020] [Indexed: 01/21/2023] Open
Abstract
Forkhead box (FOX) proteins are transcriptional factors that regulate various cellular processes. This minireview provides an overview of FOXA2 functions, with a special emphasis on the regulation airway mucus homeostasis in both healthy and diseased lungs. FOXA2 plays crucial roles during lung morphogenesis, surfactant protein production, goblet cell differentiation and mucin expression. In healthy airways, FOXA2 exerts a tight control over goblet cell development and mucin biosynthesis. However, in diseased airways, microbial infections and proinflammatory responses deplete FOXA2 expression, resulting in uncontrolled goblet cell hyperplasia and metaplasia, mucus hypersecretion, and impaired mucociliary clearance of pathogens. Furthermore, accumulated mucus clogs the airways and creates a niche environment for persistent microbial colonization and infection, leading to acute exacerbation and deterioration of pulmonary function in patients with chronic lung diseases. Various studies have shown that FOXA2 inhibition is mediated through induction of antagonistic EGFR and IL-13R-STAT6 signaling pathways as well as through posttranslational modifications induced by microbial infections. An improved understanding of how bacterial pathogens inactivate FOXA2 may pave the way for developing therapeutics that preserve the protein's function, which in turn, will improve the mucus status and mucociliary clearance of pathogens, reduce microbial-mediated acute exacerbation and restore lung function in patients with chronic lung diseases.
Collapse
Affiliation(s)
- Woosuk Choi
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Shawn Choe
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Gee W Lau
- Department of Pathobiology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| |
Collapse
|
8
|
Lo Bello F, Ieni A, Hansbro PM, Ruggeri P, Di Stefano A, Nucera F, Coppolino I, Monaco F, Tuccari G, Adcock IM, Caramori G. Role of the mucins in pathogenesis of COPD: implications for therapy. Expert Rev Respir Med 2020; 14:465-483. [PMID: 32133884 DOI: 10.1080/17476348.2020.1739525] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Introduction: Evidence accumulated in the last decade has started to reveal the enormous complexity in the expression, interactions and functions of the large number of different mucins present in the different compartments of the human lower airways. This occurs both in normal subjects and in COPD patients in different clinical phases and stages of severity.Areas covered: We review the known physiological mechanisms that regulate mucin production in human lower airways of normal subjects, the changes in mucin synthesis/secretion in COPD patients and the clinical efficacy of drugs that modulate mucin synthesis/secretion.Expert opinion: It is evident that the old simplistic concept that mucus hypersecretion in COPD patients is associated with negative clinical outcomes is not valid and that the therapeutic potential of 'mucolytic drugs' is under-appreciated due to the complexity of the associated molecular network(s). Likewise, our current knowledge of the effects of the drugs already available on the market that target mucin synthesis/secretion/structure in the lower airways is extremely limited and often indirect and more well-controlled clinical trials are needed in this area.
Collapse
Affiliation(s)
- Federica Lo Bello
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Antonio Ieni
- Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", Section of Anatomic Pathology, University of Messina, Messina, Italy
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute, Sydney, University of Technology Sydney, Ultimo, Australia
| | - Paolo Ruggeri
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Antonino Di Stefano
- Divisione di Pneumologia e Laboratorio di Citoimmunopatologia dell'Apparato Cardio Respiratorio, Istituti Clinici Scientifici Maugeri, IRCCS, Veruno, Italy
| | - Francesco Nucera
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Irene Coppolino
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| | - Francesco Monaco
- Unità Operativa Semplice Dipartimentale di Chirurgia Toracica, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), AOU Policlinico "G.martino", Messina, Italy
| | - Giovanni Tuccari
- Department of Human Pathology in Adult and Developmental Age "Gaetano Barresi", Section of Anatomic Pathology, University of Messina, Messina, Italy
| | - Ian M Adcock
- Airway Disease Section, National Heart and Lung Institute, Imperial College, London, UK
| | - Gaetano Caramori
- Pneumologia, Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali (BIOMORF), Università di Messina, Messina, Italy
| |
Collapse
|
9
|
Lee JH, Jeon J, Bai F, Jin S, Wu W, Ha UH. The Pseudomonas aeruginosa HSP70-like protein DnaK induces IL-1β expression via TLR4-dependent activation of the NF-κB and JNK signaling pathways. Comp Immunol Microbiol Infect Dis 2019; 67:101373. [PMID: 31704499 DOI: 10.1016/j.cimid.2019.101373] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 12/18/2022]
Abstract
IL-1β expression is increased in response to P. aeruginosa infection, but the responsible proteins have not been clearly elucidated. Here, we demonstrate for the first time that IL-1β expression is induced in response to the heat shock protein 70-like protein DnaK. Treatment with recombinant DnaK (rDnaK) increased IL-1β expression in a dose- and time-dependent manner, and the release of mature IL-1β in response to rDnaK was detected to an extent similar to that stimulated by the well-known agonists, lipopolysaccharide and nigericin. rDnaK-mediated IL-1β expression was driven by the NF-κB signaling pathway. In addition, expression was controlled by the JNK signaling pathway, although these two signaling cascades act independently upon rDnaK stimulation. Finally, rDnaK-induced IL-1β expression was initiated via the action of TLR4. Taken together, the data reveal that P. aeruginosa-derived DnaK induces expression of IL-1β via TLR4-dependent activation of the NF-κB and JNK signaling pathways.
Collapse
Affiliation(s)
- Jung-Hoon Lee
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea
| | - Jisu Jeon
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea
| | - Fang Bai
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, Nankai University, Tianjin 300071, China
| | - Shouguang Jin
- Department of Molecular Genetics and Microbiology, University of Florida, Gainesville, Florida 32610, USA
| | - Weihui Wu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, Nankai University, Tianjin 300071, China
| | - Un-Hwan Ha
- Department of Biotechnology and Bioinformatics, Korea University, Sejong 30019, Republic of Korea.
| |
Collapse
|
10
|
Choi W, Yang AX, Waltenburg MA, Choe S, Steiner M, Radwan A, Lin J, Maddox CW, Stern AW, Fredrickson RL, Lau GW. FOXA2 depletion leads to mucus hypersecretion in canine airways with respiratory diseases. Cell Microbiol 2018; 21:e12957. [DOI: 10.1111/cmi.12957] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/11/2018] [Accepted: 09/12/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Woosuk Choi
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Alina X. Yang
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Michelle A. Waltenburg
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Shawn Choe
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Madeline Steiner
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Ahmed Radwan
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Jingjun Lin
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Carrol W. Maddox
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
- Veterinary Diagnostic Laboratory, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Adam W. Stern
- Veterinary Diagnostic Laboratory, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
- Department of Veterinary Clinical Medicine, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Richard L. Fredrickson
- Veterinary Diagnostic Laboratory, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
- Department of Veterinary Clinical Medicine, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| | - Gee W. Lau
- Department of Pathobiology, College of Veterinary MedicineUniversity of Illinois at Urbana‐Champaign Urbana Illinois USA
| |
Collapse
|
11
|
Magalhães M, Tost J, Pineau F, Rivals I, Busato F, Alary N, Mely L, Leroy S, Murris M, Caimmi D, Claustres M, Chiron R, De Sario A. Dynamic changes of DNA methylation and lung disease in cystic fibrosis: lessons from a monogenic disease. Epigenomics 2018; 10:1131-1145. [PMID: 30052057 DOI: 10.2217/epi-2018-0005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
AIM To assess whether DNA methylation levels account for the noninherited phenotypic variations observed among cystic fibrosis (CF) patients. PATIENTS & METHODS Using the 450 K BeadChip, we profiled DNA methylation in nasal epithelial cells collected from 32 CF patients and 16 controls. RESULTS We detected substantial DNA methylation differences up to 55% (median β change 0.13; IQR: 0.15-0.11) between CF patients and controls. DNA methylation levels differed between mild and severe CF patients and correlated with lung function at 50 CpG sites. CONCLUSION In CF samples, dynamic changes of DNA methylation occurred in genes responsible for the integrity of the epithelium and the inflammatory and immune responses, were prominent in transcriptionally active genomic regions and were over-represented in enhancers active in lung tissues. ( Clinicaltrials.gov NCT02884622).
Collapse
Affiliation(s)
- Milena Magalhães
- Laboratoire de Génétique de Maladies Rares - EA7402 Montpellier University - Montpellier - France.,Laboratory of Biological System Modeling - INCT/IDN, CDTS - Rio de Janeiro - Brazil
| | - Jörg Tost
- Laboratory for Epigenetics & Environment - Centre National de Recherche en Génomique Humaine - CEA - Institut de Biologie François Jacob - Evry - France
| | - Fanny Pineau
- Laboratoire de Génétique de Maladies Rares - EA7402 Montpellier University - Montpellier - France
| | - Isabelle Rivals
- Equipe de Statistique Appliquée - ESPCI Paris - PSL Research University - UMRS1158 - Paris - France
| | - Florence Busato
- Laboratory for Epigenetics & Environment - Centre National de Recherche en Génomique Humaine - CEA - Institut de Biologie François Jacob - Evry - France
| | - Nathan Alary
- Laboratoire de Génétique de Maladies Rares - EA7402 Montpellier University - Montpellier - France
| | - Laurent Mely
- CRCM, Renée Sabran Hospital - CHU Lyon - Hyères - France
| | - Sylvie Leroy
- CRCM, Pasteur Hospital - CHU Nice - Nice - France
| | - Marlène Murris
- CRCM, Larrey Hospital - CHU Toulouse - Toulouse - France
| | - Davide Caimmi
- CRCM, Arnaud de Villeneuve Hospital - CHU Montpellier - Montpellier - France
| | - Mireille Claustres
- Laboratoire de Génétique de Maladies Rares - EA7402 Montpellier University - Montpellier - France.,Laboratoire de Génétique Moléculaire - CHU Montpellier - Montpellier - France
| | - Raphaël Chiron
- CRCM, Arnaud de Villeneuve Hospital - CHU Montpellier - Montpellier - France
| | - Albertina De Sario
- Laboratoire de Génétique de Maladies Rares - EA7402 Montpellier University - Montpellier - France
| |
Collapse
|
12
|
Garcia M, Morello E, Garnier J, Barrault C, Garnier M, Burucoa C, Lecron JC, Si-Tahar M, Bernard FX, Bodet C. Pseudomonas aeruginosa flagellum is critical for invasion, cutaneous persistence and induction of inflammatory response of skin epidermis. Virulence 2018; 9:1163-1175. [PMID: 30070169 PMCID: PMC6086312 DOI: 10.1080/21505594.2018.1480830] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 05/21/2018] [Indexed: 12/22/2022] Open
Abstract
Pseudomonas aeruginosa, an opportunistic pathogen involved in skin and lung diseases, possesses numerous virulence factors, including type 2 and 3 secretion systems (T2SS and T3SS) and its flagellum, whose functions remain poorly known during cutaneous infection. Using isogenic mutants deleted from genes encoding each or all of these three virulence factors, we investigated their role in induction of inflammatory response and in tissue invasiveness in human primary keratinocytes and reconstructed epidermis. Our results showed that flagellum, but not T2SS and T3SS, is involved in induction of a large panel of cytokine, chemokine, and antimicrobial peptide (AMP) mRNA in the infected keratinocytes. Chemokine secretion and AMP tissular production were also dependent on the presence of the bacterial flagellum. This pro-inflammatory effect was significantly reduced in keratinocytes infected in presence of anti-toll-like receptor 5 (TLR5) neutralizing antibody. Bacterial invasion of human epidermis and persistence in a mouse model of sub-cutaneous infection were dependent on the P. aeruginosa flagellum. We demonstrated that flagellum constitutes the main virulence factor of P. aeruginosa involved not only in early induction of the epidermis inflammatory response but also in bacterial invasion and cutaneous persistence. P. aeruginosa is mainly sensed by TLR5 during the early innate immune response of human primary keratinocytes.
Collapse
Affiliation(s)
- Magali Garcia
-
Laboratoire Inflammation Tissus Epithéliaux et Cytokines EA 4331, Université de Poitiers
, Poitiers, France
-
Laboratoire de Virologie et Mycobactériologie, CHU de Poitiers
, Poitiers, France
| | - Eric Morello
-
Centre d'Etude des Pathologies Respiratoires, INSERM UMR 1100, Université de Tours
, Tours, France
| | | | | | - Martine Garnier
-
Laboratoire Inflammation Tissus Epithéliaux et Cytokines EA 4331, Université de Poitiers
, Poitiers, France
| | - Christophe Burucoa
-
Laboratoire Inflammation Tissus Epithéliaux et Cytokines EA 4331, Université de Poitiers
, Poitiers, France
-
Laboratoire de Bactériologie et Hygiène, CHU de Poitiers
, Poitiers, France
| | - Jean-Claude Lecron
-
Laboratoire Inflammation Tissus Epithéliaux et Cytokines EA 4331, Université de Poitiers
, Poitiers, France
-
Laboratoire d’Immunologie et Inflammation, CHU de Poitiers
, Poitiers, France
| | - Mustapha Si-Tahar
-
Centre d'Etude des Pathologies Respiratoires, INSERM UMR 1100, Université de Tours
, Tours, France
| | | | - Charles Bodet
-
Laboratoire Inflammation Tissus Epithéliaux et Cytokines EA 4331, Université de Poitiers
, Poitiers, France
| |
Collapse
|
13
|
Luan X, Belev G, Tam JS, Jagadeeshan S, Hassan N, Gioino P, Grishchenko N, Huang Y, Carmalt JL, Duke T, Jones T, Monson B, Burmester M, Simovich T, Yilmaz O, Campanucci VA, Machen TE, Chapman LD, Ianowski JP. Cystic fibrosis swine fail to secrete airway surface liquid in response to inhalation of pathogens. Nat Commun 2017; 8:786. [PMID: 28983075 PMCID: PMC5629252 DOI: 10.1038/s41467-017-00835-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 07/28/2017] [Indexed: 11/09/2022] Open
Abstract
Cystic fibrosis is caused by mutations in the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR) channel, which can result in chronic lung disease. The sequence of events leading to lung disease is not fully understood but recent data show that the critical pathogenic event is the loss of the ability to clear bacteria due to abnormal airway surface liquid secretion (ASL). However, whether the inhalation of bacteria triggers ASL secretion and whether this is abnormal in cystic fibrosis has never been tested. Here we show, using a novel synchrotron-based in vivo imaging technique, that wild-type pigs display both a basal and a Toll-like receptor-mediated ASL secretory response to the inhalation of cystic fibrosis relevant bacteria. Both mechanisms fail in CFTR-/- swine, suggesting that cystic fibrosis airways do not respond to inhaled pathogens, thus favoring infection and inflammation that may eventually lead to tissue remodeling and respiratory disease.Cystic fibrosis is caused by mutations in the CFTR chloride channel, leading to reduced airway surface liquid secretion. Here the authors show that exposure to bacteria triggers secretion in wild-type but not in pig models of cystic fibrosis, suggesting an impaired response to pathogens contributes to infection.
Collapse
Affiliation(s)
- Xiaojie Luan
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - George Belev
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, SK, Canada, S7N 2V3
| | - Julian S Tam
- Department of Medicine, Division of Respirology, Critical Care, and Sleep Medicine, University of Saskatchewan, Royal University Hospital, 103 Hospital Drive, Saskatoon, SK, Canada, S7N 0W8
| | - Santosh Jagadeeshan
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Noman Hassan
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Paula Gioino
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Nikolay Grishchenko
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Yanyun Huang
- Prairie Diagnostic Services Inc., 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - James L Carmalt
- Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - Tanya Duke
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - Teela Jones
- Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - Bev Monson
- Animal Care Unit, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - Monique Burmester
- Animal Care Unit, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, SK, Canada, S7N 5B4
| | - Tomer Simovich
- Surface Science and Technology Group, School of Chemistry, The University of Melbourne, Parkville, VIC, 3010, Australia
| | - Orhan Yilmaz
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Veronica A Campanucci
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Terry E Machen
- Department of Molecular and Cell Biology, University of California, 231 LSA, Berkeley, CA, 94720-3200, USA
| | - L Dean Chapman
- University of Saskatchewan, Department of Anatomy and Cell Biology, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5
| | - Juan P Ianowski
- Department of Physiology, University of Saskatchewan, Health Science Building, Room 2D01, 107 Wiggins Road, Saskatoon, SK, Canada, S7N 5E5.
| |
Collapse
|
14
|
Experimental Pseudomonas aeruginosa mediated rhino sinusitis in mink. Int J Pediatr Otorhinolaryngol 2017; 96:156-163. [PMID: 28302328 DOI: 10.1016/j.ijporl.2016.12.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 12/25/2016] [Accepted: 12/26/2016] [Indexed: 12/13/2022]
Abstract
OBJECTIVES The nasal and sinus cavities in children may serve as reservoirs for microorganisms that cause recurrent and chronic lung infections. This study evaluates whether the mink can be used as an animal model for studying Pseudomonas aeruginosa mediated rhino-sinusitis since there is no suitable traditional animal model for this disease. METHODS Nasal tissue samples from infected and control mink were fixed in formalin, demineralized, and embedded in paraffin. A histological examination of sections from the infected animals revealed disintegration of the respiratory epithelium lining the nasal turbinates and swelling and edema of the submucosa. The expression of mucins and sialylated glycans was examined using immunohistochemistry. RESULTS MUC1, MUC2 and MUC5AC were upregulated in the inoculated animals as a much stronger staining was present in the respiratory epithelium in the infected animals compared to the controls. The goblet cells in the nasal epithelium from the infected mink showed high affinity to the Maackia amurensis lectin and anti-asialo GM1 indicating a high concentration of α2-3 sialic acid respectively βGalNAc1-4Galβ containing glycans in these mucin producing cells. The nasal cavity in the infected mink shows features of carbohydrate expression comparable to what has been described in the respiratory system after Pseudomonas aeruginosa infection in humans. CONCLUSION It is suggested that the mink is suitable for studying Pseudomonas aeruginosa mediated rhino-sinusitis.
Collapse
|
15
|
Parker D, Ahn D, Cohen T, Prince A. Innate Immune Signaling Activated by MDR Bacteria in the Airway. Physiol Rev 2016; 96:19-53. [PMID: 26582515 DOI: 10.1152/physrev.00009.2015] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Health care-associated bacterial pneumonias due to multiple-drug resistant (MDR) pathogens are an important public health problem and are major causes of morbidity and mortality worldwide. In addition to antimicrobial resistance, these organisms have adapted to the milieu of the human airway and have acquired resistance to the innate immune clearance mechanisms that normally prevent pneumonia. Given the limited efficacy of antibiotics, bacterial clearance from the airway requires an effective immune response. Understanding how specific airway pathogens initiate and regulate innate immune signaling, and whether this response is excessive, leading to host-induced pathology may guide future immunomodulatory therapy. We will focus on three of the most important causes of health care-associated pneumonia, Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella pneumoniae, and review the mechanisms through which an inappropriate or damaging innate immune response is stimulated, as well as describe how airway pathogens cause persistent infection by evading immune activation.
Collapse
Affiliation(s)
- Dane Parker
- Departments of Pediatrics and Pharmacology, Columbia University, New York, New York
| | - Danielle Ahn
- Departments of Pediatrics and Pharmacology, Columbia University, New York, New York
| | - Taylor Cohen
- Departments of Pediatrics and Pharmacology, Columbia University, New York, New York
| | - Alice Prince
- Departments of Pediatrics and Pharmacology, Columbia University, New York, New York
| |
Collapse
|
16
|
Abstract
Submucosal glands contribute to airway surface liquid (ASL), a film that protects all airway surfaces. Glandular mucus comprises electrolytes, water, the gel-forming mucin MUC5B, and hundreds of different proteins with diverse protective functions. Gland volume per unit area of mucosal surface correlates positively with impaction rate of inhaled particles. In human main bronchi, the volume of the glands is ∼ 50 times that of surface goblet cells, but the glands diminish in size and frequency distally. ASL and its trapped particles are removed from the airways by mucociliary transport. Airway glands have a tubuloacinar structure, with a single terminal duct, a nonciliated collecting duct, then branching secretory tubules lined with mucous cells and ending in serous acini. They allow for a massive increase in numbers of mucus-producing cells without replacing surface ciliated cells. Active secretion of Cl(-) and HCO3 (-) by serous cells produces most of the fluid of gland secretions. Glands are densely innervated by tonically active, mutually excitatory airway intrinsic neurons. Most gland mucus is secreted constitutively in vivo, with large, transient increases produced by emergency reflex drive from the vagus. Elevations of [cAMP]i and [Ca(2+)]i coordinate electrolyte and macromolecular secretion and probably occur together for baseline activity in vivo, with cholinergic elevation of [Ca(2+)]i being mainly responsive for transient increases in secretion. Altered submucosal gland function contributes to the pathology of all obstructive diseases, but is an early stage of pathogenesis only in cystic fibrosis.
Collapse
Affiliation(s)
- Jonathan H Widdicombe
- Department of Physiology and Membrane Biology, University of California-Davis, Davis, California; and Department of Psychology and Cystic Fibrosis Research Laboratory, Stanford University, Stanford, California
| | - Jeffrey J Wine
- Department of Physiology and Membrane Biology, University of California-Davis, Davis, California; and Department of Psychology and Cystic Fibrosis Research Laboratory, Stanford University, Stanford, California
| |
Collapse
|
17
|
Engel O, Akyüz L, da Costa Goncalves AC, Winek K, Dames C, Thielke M, Herold S, Böttcher C, Priller J, Volk HD, Dirnagl U, Meisel C, Meisel A. Cholinergic Pathway Suppresses Pulmonary Innate Immunity Facilitating Pneumonia After Stroke. Stroke 2015; 46:3232-40. [PMID: 26451017 DOI: 10.1161/strokeaha.115.008989] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 08/24/2015] [Indexed: 01/09/2023]
Abstract
BACKGROUND AND PURPOSE Temporary immunosuppression has been identified as a major risk factor for the development of pneumonia after acute central nervous system injury. Although overactivation of the sympathetic nervous system was previously shown to mediate suppression of systemic cellular immune responses after stroke, the role of the parasympathetic cholinergic anti-inflammatory pathway in the antibacterial defense in lung remains largely elusive. METHODS The middle cerebral artery occlusion model in mice was used to examine the influence of the parasympathetic nervous system on poststroke immunosuppression. We used heart rate variability measurement by telemetry, vagotomy, α7 nicotinic acetylcholine receptor-deficient mice, and parasympathomimetics (nicotine, PNU282987) to measure and modulate parasympathetic activity. RESULTS Here, we demonstrate a rapidly increased parasympathetic activity in mice after experimental stroke. Inhibition of cholinergic signaling by either vagotomy or by using α7 nicotinic acetylcholine receptor-deficient mice reversed pulmonary immune hyporesponsiveness and prevented pneumonia after stroke. In vivo and ex vivo studies on the role of α7 nicotinic acetylcholine receptor on different lung cells using bone marrow chimeric mice and isolated primary cells indicated that not only macrophages but also alveolar epithelial cells are a major cellular target of cholinergic anti-inflammatory signaling in the lung. CONCLUSIONS Thus, cholinergic pathways play a pivotal role in the development of pulmonary infections after acute central nervous system injury.
Collapse
Affiliation(s)
- Odilo Engel
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Levent Akyüz
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Andrey C da Costa Goncalves
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Katarzyna Winek
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Claudia Dames
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Mareike Thielke
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Susanne Herold
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Chotima Böttcher
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Josef Priller
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Hans Dieter Volk
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Ulrich Dirnagl
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Christian Meisel
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.)
| | - Andreas Meisel
- From the Department of Experimental Neurology (O.E., K.W., M.T., U.D., A.M.), Department of Neurology (U.D., A.M.), NeuroCure Clinical Research (U.D., A.M.), Institute for Medical Immunology (L.A., C.D., H.D.V., C.M.), BCRT Berlin Brandenburg Centre for Regenerative Medicine (L.A., H.D.V.), Department of Neuropsychiatry and Laboratory of Molecular Psychiatry (C.B., J.P.), and Center for Stroke Research Berlin (O.E., K.W., M.T., U.D., A.M.), Charité University Medicine Berlin, Berlin, Germany; German Center for Neurodegeneration Research (DZNE), partner site Berlin, Germany (J.P., U.D.); Department of Internal Medicine II, Justus-Liebig-University, Universities Giessen and Marburg Lung Center, Member of the German Center for Lung Research (DZL) (S.H.); and Max Delbrück Center for Molecular Medicine, Berlin, Germany (A.C.d.C.G.).
| |
Collapse
|
18
|
Abstract
The different types of cells in the lung, from the conducting airway epithelium to the alveolar epithelium and the pulmonary vasculature, are interconnected by gap junctions. The specific profile of gap junction proteins, the connexins, expressed in these different cell types forms compartments of intercellular communication that can be further shaped by the release of extracellular nucleotides via pannexin1 channels. In this review, we focus on the physiology of connexins and pannexins and describe how this lung communication network modulates lung function and host defenses in conductive and respiratory airways.
Collapse
Affiliation(s)
- Davide Losa
- Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland
- The ithree Institute, University of Technology Sydney, 2007 Ultimo, NSW Australia
| | - Marc Chanson
- Geneva University Hospitals and University of Geneva, 1211 Geneva, Switzerland
| |
Collapse
|
19
|
Palomo J, Marchiol T, Piotet J, Fauconnier L, Robinet M, Reverchon F, Le Bert M, Togbe D, Buijs-Offerman R, Stolarczyk M, Quesniaux VFJ, Scholte BJ, Ryffel B. Role of IL-1β in experimental cystic fibrosis upon P. aeruginosa infection. PLoS One 2014; 9:e114884. [PMID: 25500839 PMCID: PMC4264861 DOI: 10.1371/journal.pone.0114884] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 11/14/2014] [Indexed: 11/18/2022] Open
Abstract
Cystic fibrosis is associated with increased inflammatory responses to pathogen challenge. Here we revisited the role of IL-1β in lung pathology using the experimental F508del-CFTR murine model on C57BL/6 genetic background (Cftr(tm1eur) or d/d), on double deficient for d/d and type 1 interleukin-1 receptor (d/d X IL-1R1-/-), and antibody neutralization. At steady state, young adult d/d mice did not show any signs of spontaneous lung inflammation. However, IL-1R1 deficiency conferred partial protection to repeated P. aeruginosa endotoxins/LPS lung instillation in d/d mice, as 50% of d/d mice succumbed to inflammation, whereas all d/d x IL-1R1-/- double mutants survived with lower initial weight loss and less pulmonary collagen and mucus production, suggesting that the absence of IL-1R1 signaling is protective in d/d mice in LPS-induced lung damage. Using P. aeruginosa acute lung infection we found heightened neutrophil recruitment in d/d mice with higher epithelial damage, increased bacterial load in BALF, and augmented IL-1β and TNF-α in parenchyma as compared to WT mice. Thus, F508del-CFTR mice show enhanced IL-1β signaling in response to P. aeruginosa. IL-1β antibody neutralization had no effect on lung homeostasis in either d/d or WT mice, however P. aeruginosa induced lung inflammation and bacterial load were diminished by IL-1β antibody neutralization. In conclusion, enhanced susceptibility to P. aeruginosa in d/d mice correlates with an excessive inflammation and with increased IL-1β production and reduced bacterial clearance. Further, we show that neutralization of IL-1β in d/d mice through the double mutation d/d x IL-1R1-/- and in WT via antibody neutralization attenuates inflammation. This supports the notion that intervention in the IL-1R1/IL-1β pathway may be detrimental in CF patients.
Collapse
Affiliation(s)
- Jennifer Palomo
- CNRS, UMR7355, Orleans, France
- Experimental and Molecular Immunology and Neurogenetics, University of Orléans, Orléans, France
| | | | - Julie Piotet
- CNRS, UMR7355, Orleans, France
- Experimental and Molecular Immunology and Neurogenetics, University of Orléans, Orléans, France
| | | | | | - Flora Reverchon
- CNRS, UMR7355, Orleans, France
- Experimental and Molecular Immunology and Neurogenetics, University of Orléans, Orléans, France
| | | | | | | | | | - Valérie F. J. Quesniaux
- CNRS, UMR7355, Orleans, France
- Experimental and Molecular Immunology and Neurogenetics, University of Orléans, Orléans, France
| | - Bob J. Scholte
- Erasmus MC, Cell Biology department, Rotterdam, The Netherlands
- * E-mail: (BS); (BR)
| | - Bernhard Ryffel
- CNRS, UMR7355, Orleans, France
- Experimental and Molecular Immunology and Neurogenetics, University of Orléans, Orléans, France
- Institute of Infectious Disease and Molecular Medicine, IDM, Cape Town, South Africa
- * E-mail: (BS); (BR)
| |
Collapse
|
20
|
Pseudomonas aeruginosa triggers CFTR-mediated airway surface liquid secretion in swine trachea. Proc Natl Acad Sci U S A 2014; 111:12930-5. [PMID: 25136096 DOI: 10.1073/pnas.1406414111] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cystic fibrosis (CF) is an autosomal recessive genetic disorder caused by mutations in the gene encoding for the anion channel cystic fibrosis transmembrane conductance regulator (CFTR). Several organs are affected in CF, but most of the morbidity and mortality comes from lung disease. Recent data show that the initial consequence of CFTR mutation is the failure to eradicate bacteria before the development of inflammation and airway remodeling. Bacterial clearance depends on a layer of airway surface liquid (ASL) consisting of both a mucus layer that traps, kills, and inactivates bacteria and a periciliary liquid layer that keeps the mucus at an optimum distance from the underlying epithelia, to maximize ciliary motility and clearance of bacteria. The airways in CF patients and animal models of CF demonstrate abnormal ASL secretion and reduced antimicrobial properties. Thus, it has been proposed that abnormal ASL secretion in response to bacteria may facilitate the development of the infection and inflammation that characterize CF airway disease. Whether the inhalation of bacteria triggers ASL secretion, and the role of CFTR, have never been tested, however. We developed a synchrotron-based imaging technique to visualize the ASL layer and measure the effect of bacteria on ASL secretion. We show that the introduction of Pseudomonas aeruginosa and other bacteria into the lumen of intact isolated swine tracheas triggers CFTR-dependent ASL secretion by the submucosal glands. This response requires expression of the bacterial protein flagellin. In patients with CF, the inhalation of bacteria would fail to trigger ASL secretion, leading to infection and inflammation.
Collapse
|
21
|
Toll-like receptor 9 deficiency protects mice against Pseudomonas aeruginosa lung infection. PLoS One 2014; 9:e90466. [PMID: 24595157 PMCID: PMC3942450 DOI: 10.1371/journal.pone.0090466] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/03/2014] [Indexed: 01/15/2023] Open
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen involved in nosocomial infections. While a number of studies have demonstrated the roles of TLR2, TLR4 and TLR5 in host defense againt P. aeruginosa infection, the implication of TLR9 in this process has been overlooked. Here, we show that P. aeruginosa DNA stimulates the inflammatory response through TLR9 pathway in both a cell line and primary alveolar macrophages (AMs). This activation requires asparagine endopeptidase- and endosomal acidification. Interestingly, TLR9-/- mice resisted to lethal lung infection by P. aeruginosa, compared to WT C57BL/6 mice. The resistance of TLR9-/- mice to P. aeruginosa infection was associated with: (i) a higher ability of TLR9-/- AMs to kill P. aeruginosa; (ii) a rapid increase in the pro-inflammatory cytokines such as TNFα, IL-1β and IL-6 production; and (iii) an increase in nitric oxide (NO) production and inductible NO synthase expression in AMs. In addition, inhibition of both IL-1β and NO production resulted in a significant decrease of P. aeruginosa clearance by AMs. Altogether these results indicate that TLR9 plays a detrimental role in pulmonary host defense toward P. aeruginosa by reducing the AMs clearance activity and production of IL-1β and NO necessary for bacteria killing.
Collapse
|
22
|
Fung SY, Sofiyev V, Schneiderman J, Hirschfeld AF, Victor RE, Woods K, Piotrowski JS, Deshpande R, Li SC, de Voogd NJ, Myers CL, Boone C, Andersen RJ, Turvey SE. Unbiased screening of marine sponge extracts for anti-inflammatory agents combined with chemical genomics identifies girolline as an inhibitor of protein synthesis. ACS Chem Biol 2014; 9:247-57. [PMID: 24117378 DOI: 10.1021/cb400740c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Toll-like receptors (TLRs) play a critical role in innate immunity, but activation of TLR signaling pathways is also associated with many harmful inflammatory diseases. Identification of novel anti-inflammatory molecules targeting TLR signaling pathways is central to the development of new treatment approaches for acute and chronic inflammation. We performed high-throughput screening from crude marine sponge extracts on TLR5 signaling and identified girolline. We demonstrated that girolline inhibits signaling through both MyD88-dependent and -independent TLRs (i.e., TLR2, 3, 4, 5, and 7) and reduces cytokine (IL-6 and IL-8) production in human peripheral blood mononuclear cells and macrophages. Using a chemical genomics approach, we identified Elongation Factor 2 as the molecular target of girolline, which inhibits protein synthesis at the elongation step. Together these data identify the sponge natural product girolline as a potential anti-inflammatory agent acting through inhibition of protein synthesis.
Collapse
Affiliation(s)
- Shan-Yu Fung
- Department of Pediatrics, British Columbia Children’s Hospital and Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Vladimir Sofiyev
- Department
of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Julia Schneiderman
- Department of Pediatrics, British Columbia Children’s Hospital and Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Aaron F. Hirschfeld
- Department of Pediatrics, British Columbia Children’s Hospital and Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Rachel E. Victor
- Department of Pediatrics, British Columbia Children’s Hospital and Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| | - Kate Woods
- Department
of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jeff S. Piotrowski
- Great
Lakes Bioenergy Research Center, University of Wisconsin−Madison, Madison, Wisconsin 53726, United States
| | - Raamesh Deshpande
- Department
of Computer Science and Engineering, University of Minnesota−Twin Cities, Mineapolis, Minnesota 55455, United States
| | - Sheena C. Li
- Department
of Molecular Genetics, Terrence Donnelly Centre for Cellular and Biomolecular
Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Nicole J. de Voogd
- Netherlands
Centre for Biodiversity Naturalis, P.O.
Box 9517, 2300 RA, Leiden, The Netherlands
| | - Chad L. Myers
- Department
of Computer Science and Engineering, University of Minnesota−Twin Cities, Mineapolis, Minnesota 55455, United States
| | - Charlie Boone
- Department
of Molecular Genetics, Terrence Donnelly Centre for Cellular and Biomolecular
Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Raymond J. Andersen
- Department
of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Stuart E. Turvey
- Department of Pediatrics, British Columbia Children’s Hospital and Child & Family Research Institute, University of British Columbia, Vancouver, British Columbia V5Z 4H4, Canada
| |
Collapse
|
23
|
Balyimez A, Colmer-Hamood JA, San Francisco M, Hamood AN. Characterization of the Pseudomonas aeruginosa metalloendopeptidase, Mep72, a member of the Vfr regulon. BMC Microbiol 2013; 13:269. [PMID: 24279383 PMCID: PMC4222646 DOI: 10.1186/1471-2180-13-269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 11/20/2013] [Indexed: 02/08/2023] Open
Abstract
Background Pseudomonas aeruginosa Vfr (the virulence factor regulator) enhances P. aeruginosa virulence by positively regulating the expression of numerous virulence genes. A previous microarray analysis identified numerous genes positively regulated by Vfr in strain PAK, including the yet uncharacterized PA2782 and PA2783. Results In this study, we report the detailed characterization of PA2783 in the P. aeruginosa strain PAO1. RT-PCR analysis confirmed that PA2782-PA2783 constitute an operon. A mutation in vfr significantly reduced the expression of both genes. The predicted protein encoded by PA2783 contains a typical leader peptide at its amino terminus end as well as metalloendopeptidase and carbohydrate binding motifs at its amino terminus and carboxy terminus regions, respectively. An in-frame PA2783::phoA fusion encoded a hybrid protein that was exported to the periplasmic space of Escherichia coli and P. aeruginosa. In PAO1, the proteolytic activity of the PA2783-encoded protein was masked by other P. aeruginosa extracellular proteases but an E. coli strain carrying a PA2783 recombinant plasmid produced considerable proteolytic activity. The outer membrane fraction of an E. coli strain in which PA2783 was overexpressed contained specific endopeptidase activity. In the presence of cAMP, purified recombinant Vfr (rVfr) bound to a 98-bp fragment within the PA2782-PA2783 upstream region that carries a putative Vfr consensus sequence. Through a series of electrophoretic mobility shift assays, we localized rVfr binding to a 33-bp fragment that contains part of the Vfr consensus sequence and a 5-bp imperfect (3/5) inverted repeat at its 3′ and 5′ ends (TGGCG-N22-CGCTG). Deletion of either repeat eliminated Vfr binding. Conclusions PA2782 and PA2783 constitute an operon whose transcription is positively regulated by Vfr. The expression of PA2783 throughout the growth cycle of P. aeruginosa follows a unique pattern. PA2783 codes for a secreted metalloendopeptidase, which we named Mep72. Mep72, which has metalloendopeptidase and carbohydrate-binding domains, produced proteolytic and endopeptidase activities in E. coli. Vfr directly regulates the expression of the PA2782-mep72 operon by binding to its upstream region. However, unlike other Vfr-targeted genes, Vfr binding does not require an intact Vfr consensus binding sequence.
Collapse
Affiliation(s)
- Aysegul Balyimez
- Department of Immunology and Molecular Microbiology, Texas Tech University Health Sciences Center, Lubbock, TX, USA.
| | | | | | | |
Collapse
|
24
|
Epithelial uptake of flagella initiates proinflammatory signaling. PLoS One 2013; 8:e59932. [PMID: 23527288 PMCID: PMC3603936 DOI: 10.1371/journal.pone.0059932] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 02/21/2013] [Indexed: 12/31/2022] Open
Abstract
The airway epithelium serves multiple roles in the defense of the lung. Not only does it act as a physical barrier, it acts as a distal extension of the innate immune system. We investigated the role of the airway epithelium in the interaction with flagella, an important virulence factor of the pathogen Pseudomonas aeruginosa, a cause of ventilator associated pneumonia and significant morbidity and mortality in patients with cystic fibrosis. Flagella were required for transmigration across polarized airway epithelial cells and this was a direct consequence of motility, and not a signaling effect. Purified flagella did not alter the barrier properties of the epithelium but were observed to be rapidly endocytosed inside epithelial cells. Neither flagella nor intact P. aeruginosa stimulated epithelial inflammasome signaling. Flagella-dependent signaling required dynamin-based uptake as well as TLR5 and primarily led to the induction of proinflammatory (Tnf, Il6) as well as neutrophil (Cxcl1, Cxcl2, Ccl3) and macrophage (Ccl20) chemokines. Although flagella are important in invasion across the epithelial barrier their shedding in the airway lumen results in epithelial uptake and signaling that has a major role in the initial recruitment of immune cells in the lung.
Collapse
|
25
|
Iwashita J, Hongo K, Ito Y, Abe T, Murata J. Regulation of MUC5AC mucin production by the cell attachment dependent pathway involving integrin <i>β</i>1 in NCI-H292 human lung epithelial cells. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/abc.2013.31001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
26
|
Rieber N, Brand A, Hector A, Graepler-Mainka U, Ost M, Schäfer I, Wecker I, Neri D, Wirth A, Mays L, Zundel S, Fuchs J, Handgretinger R, Stern M, Hogardt M, Döring G, Riethmüller J, Kormann M, Hartl D. Flagellin Induces Myeloid-Derived Suppressor Cells: Implications forPseudomonas aeruginosaInfection in Cystic Fibrosis Lung Disease. THE JOURNAL OF IMMUNOLOGY 2012; 190:1276-84. [DOI: 10.4049/jimmunol.1202144] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
27
|
Ge H, Ni S, Wang X, Xu N, Liu Y, Wang X, Wang L, Song D, Song Y, Bai C. Dexamethasone reduces sensitivity to cisplatin by blunting p53-dependent cellular senescence in non-small cell lung cancer. PLoS One 2012; 7:e51821. [PMID: 23272171 PMCID: PMC3525662 DOI: 10.1371/journal.pone.0051821] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 11/06/2012] [Indexed: 12/13/2022] Open
Abstract
Introduction Dexamethasone (DEX) co-treatment has proved beneficial in NSCLC patients, improving clinical symptoms by the reduction of side effects after chemotherapy. However, recent studies have shown that DEX could render cancer cells more insensitive to cytotoxic drug therapy, but it is not known whether DEX co-treatment could influence therapy-induced senescence (TIS), and unknown whether it is in a p53-dependent or p53-independent manner. Methods We examined in different human NSCLC cell lines and detected cellular senescence after cisplatin (DDP) treatment in the presence or absence of DEX. The in vivo effect of the combination of DEX and DDP was assessed by tumor growth experiments using human lung cancer cell lines growing as xenograft tumors in nude mice. Results Co-treatment with DEX during chemotherapy in NSCLC resulted in increased tumor cell viability and inhibition of TIS compared with DDP treated group. DEX co-treatment cells exhibited the decrease of DNA damage signaling pathway proteins, the lower expression of p53 and p21CIP1, the lower cellular secretory program and down-regulation of NF-κB and its signaling cascade. DEX also significantly reduced DDP sensitivity in vivo. Conclusions Our results underscore that DEX reduces chemotherapy sensitivity by blunting therapy induced cellular senescence after chemotherapy in NSCLC, which may, at least in part, in a p53-dependent manner. These data therefore raise concerns about the widespread combined use of gluocorticoids (GCs) with antineoplastic drugs in the clinical management of cancer patients.
Collapse
Affiliation(s)
- Haiyan Ge
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- Department of Respiratory Medicine, The Affiliated Hospital of Nantong University, Nantong, China
| | - Songshi Ni
- Department of Respiratory Medicine, The Affiliated Hospital of Nantong University, Nantong, China
| | - Xingan Wang
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Nuo Xu
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ying Liu
- Department of Respiratory Medicine, The Affiliated Hospital of Nantong University, Nantong, China
| | - Xun Wang
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Lingyan Wang
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Dongli Song
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yuanlin Song
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Chunxue Bai
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
- * E-mail:
| |
Collapse
|
28
|
|