1
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Chitlange NM, Phansopkar P. Physiotherapeutic Approach in Oral Submucous Fibrosis: A Systematic Review. Cureus 2023; 15:e48155. [PMID: 38046698 PMCID: PMC10693189 DOI: 10.7759/cureus.48155] [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: 08/16/2023] [Accepted: 11/02/2023] [Indexed: 12/05/2023] Open
Abstract
One of the most poorly recognized and inadequately managed diseases, oral submucous fibrosis progresses over time. Betel nut eating is the foremost cause of oral submucous fibrosis. One such condition is oral submucous fibrosis, which is characterized by severe trismus, disability, and a higher risk of cancer. The mouth opening gradually decreases, which is related to difficulty eating, altered gustatory sensation, and mouth dryness, leading to decreased oral intake. The main and beginning signs include decreased mouth opening, pain, difficulty eating, dry mouth, and blanching of the buccal mucosa. This is treated first with medication, then with exercises for the mouth that a physiotherapist has recommended. However, the function of a physical therapist is not clearly defined. Physiotherapy may be used with other therapies to treat oral submucous fibrosis. Mouth-opening exercises, ultrasound, and other therapeutic interventions are available. This article tries to describe the kind of physical therapy that can be recommended for treating oral submucous fibrosis. It is crucial to understand pain management, physiotherapy management for grade III and IV oral submucous fibrosis various additional exercises, modalities and their ideal dose, and strategy for the long-term effect of the treatments to conduct further research.
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Affiliation(s)
- Neha M Chitlange
- Department of Musculoskeletal Physiotherapy, Ravi Nair Physiotherapy College, Datta Meghe Institute of Higher Education and Research (Deemed to be University), Wardha, IND
| | - Pratik Phansopkar
- Department of Musculoskeletal Physiotherapy, Ravi Nair Physiotherapy College, Datta Meghe Institute of Higher Education and Research (Deemed to be University), Wardha, IND
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2
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Yadahalli R, Sarode GS, Sarode SC, Khan ZA, Vyas N, Kharat AH, Bhandi S, Awan KH, Patil S. CC group of chemokines and associated gene expression of transcription factors: Deciphering immuno-pathogenetic aspect of oral submucous fibrosis. Dis Mon 2023; 69:101351. [PMID: 35341590 DOI: 10.1016/j.disamonth.2022.101351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Oral submucous fibrosis (OSMF) is a chronic disease with significantly increasing malignant transformation rate. To date the pathogenesis of OSMF has been considered to be associated with areca nut constituents and their action on fibroblasts. However, fibrosis is also associated with immunological factors such as chemokines. In-depth analysis of such factors is the need of the hour in OSMF to better understand the pathogenesis so that effective therapeutic strategies can be developed in the future. MATERIALS AND METHOD Clinically diagnosed cases of OSMF (n=21) and healthy individuals (n=10) were enrolled in the present study. Chemokines such as CCL2, CCL3, CCL4, CCL5, CCL11, CCL17, CCL28, CXCL1, CXCL5, CXCL8, CXCL9, CXCL10, and CXCL11 were assessed using the chemokine bead array in conjunction with the flow cytometry, along with real-time PCR (RT-PCR). The transcription factors CREB, NF-κB and NFAT5 were also studied for their expressions. The analysis of pg/ml (picogram/milliliter) values was done by using LEGENDplex™ Data Analysis Software. RESULTS The results obtained demonstrated early phase transient increase in CXCL-11, CCL20, CXCL9, CCL3, CCL2, CXCL10 and CXCL8. However, the expression of CCL3, CXCL10 and CXCL8 was higher in the late stage as compared to the early stage. The relative gene expression of CREB, NF-κB, NFAT5 were upregulated in the late stage of OSMF when compared to normal. CONCLUSION Distinctive sets of chemokine expression during the early and late stages of OSMF suggest a unique pattern of disease progression playing an important role in the pathogenesis.
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Affiliation(s)
- Roopa Yadahalli
- Department of Oral Pathology and Microbiology, Dr. D.Y.Patil Dental College and Hospital, Dr.D.Y.Patil Vidyapeeth, Pune, Maharashtra, India
| | - Gargi S Sarode
- Department of Oral Pathology and Microbiology, Dr. D.Y.Patil Dental College and Hospital, Dr.D.Y.Patil Vidyapeeth, Pune, Maharashtra, India
| | - Sachin C Sarode
- Department of Oral Pathology and Microbiology, Dr. D.Y.Patil Dental College and Hospital, Dr.D.Y.Patil Vidyapeeth, Pune, Maharashtra, India
| | - Zafar Ali Khan
- Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, College of Dentistry, Jouf University, Sakaka, Saudi Arabia
| | | | - Avinash H Kharat
- Regenerative medicine laboratory, Dr. D.Y.Patil Dental College and Hospital, Dr.D.Y.Patil Vidyapeeth, Pune, India
| | - Shilpa Bhandi
- Department of Restorative Dental Science, Division of Operative Dentistry, College of Dentistry, Jazan University, Jazan 45142, Saudi Arabia
| | - Kamran Habib Awan
- College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UT, United States
| | - Shankargouda Patil
- Department of Maxillofacial Surgery and Diagnostic Sciences, Division of Oral Pathology, College of Dentistry, Jazan University, Jazan, Kingdom of Saudi Arabia.
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3
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Laucirica DR, Schofield CJ, McLean SA, Margaroli C, Agudelo‐Romero P, Stick SM, Tirouvanziam R, Kicic A, Garratt LW. Pseudomonas aeruginosa
modulates neutrophil granule exocytosis in an
in vitro
model of airway infection. Immunol Cell Biol 2022; 100:352-370. [PMID: 35318736 PMCID: PMC9544492 DOI: 10.1111/imcb.12547] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/03/2022] [Accepted: 03/21/2022] [Indexed: 12/24/2022]
Abstract
A population of neutrophils recruited into cystic fibrosis (CF) airways is associated with proteolytic lung damage, exhibiting high expression of primary granule exocytosis marker CD63 and reduced phagocytic receptor CD16. Causative factors for this population are unknown, limiting intervention. Here we present a laboratory model to characterize responses of differentiated airway epithelium and neutrophils following respiratory infection. Pediatric primary airway epithelial cells were cultured at the air–liquid interface, challenged individually or in combination with rhinovirus (RV) and Pseudomonas aeruginosa, then apically washed with medical saline to sample epithelial infection milieus. Cytokine multiplex analysis revealed epithelial antiviral signals, including IP‐10 and RANTES, increased with exclusive RV infection but were diminished if P. aeruginosa was also present. Proinflammatory signals interleukin‐1α and β were dominant in P. aeruginosa infection milieus. Infection washes were also applied to a published model of neutrophil transmigration into the airways. Neutrophils migrating into bacterial and viral–bacterial co‐infection milieus exhibited the in vivo CF phenotype of increased CD63 expression and reduced CD16 expression, while neutrophils migrating into milieus of RV‐infected or uninfected cultures did not. Individually, bacterial products lipopolysaccharide and N‐formylmethionyl‐leucyl‐phenylalanine and isolated cytokine signals only partially activated this phenotype, suggesting that additional soluble factors in the infection microenvironment trigger primary granule release. Findings identify P. aeruginosa as a trigger of acute airway inflammation and neutrophil primary granule exocytosis, underscoring potential roles of airway microbes in prompting this neutrophil subset. Further studies are required to characterize microbes implicated in primary granule release, and identify potential therapeutic targets.
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Affiliation(s)
- Daniel R Laucirica
- Faculty of Health and Medical Sciences University of Western Australia Nedlands WA Australia
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
| | - Craig J Schofield
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
| | - Samantha A McLean
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
| | - Camilla Margaroli
- Department of Medicine Division of Pulmonary, Allergy and Critical Care Medicine University of Alabama at Birmingham Birmingham AL USA
- Program in Protease and Matrix Biology University of Alabama at Birmingham Birmingham AL USA
| | - Patricia Agudelo‐Romero
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
| | - Stephen M Stick
- Faculty of Health and Medical Sciences University of Western Australia Nedlands WA Australia
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
- Department of Respiratory and Sleep Medicine Perth Children’s Hospital Nedlands WA Australia
| | - Rabindra Tirouvanziam
- Department of Pediatrics Emory University Atlanta GA USA
- Center for CF and Airways Disease Research Children’s Healthcare of Atlanta Atlanta GA USA
| | - Anthony Kicic
- Faculty of Health and Medical Sciences University of Western Australia Nedlands WA Australia
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
- Department of Respiratory and Sleep Medicine Perth Children’s Hospital Nedlands WA Australia
- Occupation and Environment School of Public Health Curtin University Bentley WA Australia
| | - Luke W Garratt
- Wal‐Yan Respiratory Research Centre Telethon Kids Institute University of Western Australia Nedlands WA Australia
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4
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Immunoglobulin A Mucosal Immunity and Altered Respiratory Epithelium in Cystic Fibrosis. Cells 2021; 10:cells10123603. [PMID: 34944110 PMCID: PMC8700636 DOI: 10.3390/cells10123603] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 12/08/2021] [Accepted: 12/15/2021] [Indexed: 12/30/2022] Open
Abstract
The respiratory epithelium represents the first chemical, immune, and physical barrier against inhaled noxious materials, particularly pathogens in cystic fibrosis. Local mucus thickening, altered mucociliary clearance, and reduced pH due to CFTR protein dysfunction favor bacterial overgrowth and excessive inflammation. We aimed in this review to summarize respiratory mucosal alterations within the epithelium and current knowledge on local immunity linked to immunoglobulin A in patients with cystic fibrosis.
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5
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Laselva O, Allegretta C, Di Gioia S, Avolio C, Conese M. Anti-Inflammatory and Anti-Oxidant Effect of Dimethyl Fumarate in Cystic Fibrosis Bronchial Epithelial Cells. Cells 2021; 10:cells10082132. [PMID: 34440900 PMCID: PMC8391758 DOI: 10.3390/cells10082132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/08/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022] Open
Abstract
Cystic Fibrosis (CF) is caused by mutations on the CF transmembrane conductance regulator (CFTR) gene and is associated with chronic infection and inflammation. Recently, it has been demonstrated that LPS-induced CFTR dysfunction in airway epithelial cells is due to an early oxidative stress. Dimethyl fumarate (DMF) is an approved anti-inflammatory and anti-oxidant drug for auto-immune and inflammatory diseases, but its role in the CF has never been investigated. In this study, we examined the effect of DMF on CF-related cytokines expression, ROS measurements and CFTR channel function. We found that DMF reduced the inflammatory response to LPS stimulation in both CF and non-CF bronchial epithelial cells, both as co-treatment and therapy, and restored LPS-mediated decrease of Trikafta™-mediated CFTR function in CF cells bearing the most common mutation, c.1521_1523delCTT (F508del). DMF also inhibited the inflammatory response induced by IL-1β/H2O2 and IL-1β/TNFα, mimicking the inflammatory status of CF patients. Finally, we also demonstrated that DMF exhibited an anti-oxidant effect on CF cells after different inflammatory stimulations. Since DMF is an approved drug, it could be further investigated as a novel anti-inflammatory molecule to ameliorate lung inflammation in CF and improve the CFTR modulators efficacy.
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Fleurot I, López-Gálvez R, Barbry P, Guillon A, Si-Tahar M, Bähr A, Klymiuk N, Sirard JC, Caballero I. TLR5 signalling is hyper-responsive in porcine cystic fibrosis airways epithelium. J Cyst Fibros 2021; 21:e117-e121. [PMID: 34420900 DOI: 10.1016/j.jcf.2021.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/07/2021] [Accepted: 08/04/2021] [Indexed: 10/20/2022]
Abstract
Excessive lung inflammation and airway epithelium damage are hallmarks of cystic fibrosis (CF) disease. It is unclear whether lung inflammation is related to an intrinsic defect in the immune response or to chronic infection. We aimed to determine whether TLR5-mediated response is defective in the CF airway epithelium. We used a newborn CF pig model to study intrinsic alterations in CF airway epithelium innate immune response. Airway epithelial cells (AECs) were stimulated with flagellin or lipopolysaccharide to determine responses specific for TLR5 and TLR4, respectively. We observed a significant increase in cytokine secretion when CF AECs were stimulated with flagellin compared to wild type (WT) AECs. These results were recapitulated when AECs were treated with an inhibitor of CFTR channel activity. We show that TLR5-signalling is altered in CF lung epithelium at birth. Modulation of TLR5 signalling could contribute to better control the excessive inflammatory response observed in CF lungs.
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Affiliation(s)
- Isabelle Fleurot
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Raquel López-Gálvez
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France
| | - Pascal Barbry
- Université Côte d'Azur, CNRS, Institut de Pharmacologie Moléculaire et Cellulaire, F06560 Sophia Antipolis, France
| | - Antoine Guillon
- Université de Tours, 37000 Tours, France; INSERM U1100, Centre d'étude des pathologies respiratoires (CEPR), 37000 Tours, France
| | - Mustapha Si-Tahar
- Université de Tours, 37000 Tours, France; INSERM U1100, Centre d'étude des pathologies respiratoires (CEPR), 37000 Tours, France
| | - Andrea Bähr
- CIMM-Gene Center and Center for Innovative Medical Models, LMU Munich, Germany
| | - Nikolai Klymiuk
- CIMM-Gene Center and Center for Innovative Medical Models, LMU Munich, Germany
| | - Jean-Claude Sirard
- Univ. Lille, CNRS, INSERM, CHU Lille, Institut Pasteur de Lille, U1019 - UMR9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France
| | - Ignacio Caballero
- INRAE, Université de Tours, UMR-1282 Infectiologie et Santé Publique (ISP), Centre de Recherche Val de Loire, 37380 Nouzilly, France.
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7
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Thomassen JC, Trojan T, Walz M, Vohlen C, Fink G, Rietschel E, Alejandre Alcazar MA, van Koningsbruggen-Rietschel S. Reduced neutrophil elastase inhibitor elafin and elevated transforming growth factor-β 1 are linked to inflammatory response in sputum of cystic fibrosis patients with Pseudomonas aeruginosa. ERJ Open Res 2021; 7:00636-2020. [PMID: 34291109 PMCID: PMC8287132 DOI: 10.1183/23120541.00636-2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 04/19/2021] [Indexed: 11/05/2022] Open
Abstract
Research question Pulmonary disease progression in patients with cystic fibrosis (CF) is characterised by inflammation and fibrosis and aggravated by Pseudomonas aeruginosa (Pa). We investigated the impact of Pa specifically on: 1) protease/antiprotease balance; 2) inflammation; and 3) the link of both parameters to clinical parameters of CF patients. Methods Transforming growth factor-β1 (TGF-β1), interleukin (IL)-1β, IL-8, neutrophil elastase (NE) and elastase inhibitor elafin were measured (ELISA assays), and gene expression of the NF-κB pathway was assessed (reverse transcriptase PCR) in the sputum of 60 CF patients with a minimum age of 5 years. Spirometry was assessed according to American Thoracic Society guidelines. Results Our results demonstrated the following: 1) NE was markedly increased in Pa-positive sputum, whereas elafin was significantly decreased; 2) increased IL-1β/IL-8 levels were associated with both Pa infection and reduced forced expiratory volume in 1 s, and sputum TGF-β1 was elevated in Pa-infected CF patients and linked to an impaired lung function; and 3) gene expression of NF-κB signalling components was increased in sputum of Pa-infected patients, and these findings were positively correlated with IL-8. Conclusion Our study links Pa infection to an imbalance of NE and NE inhibitor elafin and increased inflammatory mediators. Moreover, our data demonstrate an association between high TGF-β1 sputum levels and a progress in chronic lung inflammation and pulmonary fibrosis in CF. Controlling the excessive airway inflammation by inhibition of NE and TGF-β1 might be promising therapeutic strategies in future CF therapy and a possible complement to cystic fibrosis transmembrane conductance regulator (CFTR) modulators.
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Affiliation(s)
- Jan C Thomassen
- CF Center, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany.,Translational Experimental Pediatrics - Experimental Pulmonology, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Tobias Trojan
- CF Center, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Maxine Walz
- CF Center, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Christina Vohlen
- Translational Experimental Pediatrics - Experimental Pulmonology, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center of Molecular Medicine Cologne, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Gregor Fink
- Translational Experimental Pediatrics - Experimental Pulmonology, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Ernst Rietschel
- CF Center, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Miguel A Alejandre Alcazar
- CF Center, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany.,Translational Experimental Pediatrics - Experimental Pulmonology, Children's Hospital, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center of Molecular Medicine Cologne, Faculty of Medicine, University of Cologne, Cologne, Germany
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8
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Majka G, Mazurek H, Strus M, Ciszek-Lenda M, Szatanek R, Pac A, Golińska E, Marcinkiewicz J. Chronic bacterial pulmonary infections in advanced cystic fibrosis differently affect the level of sputum neutrophil elastase, IL-8 and IL-6. Clin Exp Immunol 2021; 205:391-405. [PMID: 34031873 DOI: 10.1111/cei.13624] [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: 02/24/2021] [Revised: 04/23/2021] [Accepted: 05/05/2021] [Indexed: 12/12/2022] Open
Abstract
Advanced cystic fibrosis (CF) lung disease is commonly characterized by a chronic Pseudomonas aeruginosa infection and destructive inflammation caused by neutrophils. However, the lack of convincing evidence from most informative biomarkers of severe lung dysfunction (SLD-CF) has hampered the formulation of a conclusive, targeted diagnosis of CF. The aim of this study was to determine whether SLD-CF is related to the high concentration of sputum inflammatory mediators and the presence of biofilm-forming bacterial strains. Forty-one patients with advanced CF lung disease were studied. The severity of pulmonary dysfunction was defined by forced expiratory volume in 1 second (FEV1) < 40%. C-reactive protein (CRP) and NLR (neutrophil-lymphocyte ratio) were examined as representative blood-based markers of inflammation. Expectorated sputum was collected and analysed for cytokines and neutrophil-derived defence proteins. Isolated sputum bacteria were identified and their biofilm-forming capacity was determined. There was no association between FEV1% and total number of sputum bacteria. However, in the high biofilm-forming group the median FEV1 was < 40%. Importantly, high density of sputum bacteria was associated with increased concentrations of neutrophil elastase and interleukin (IL)-8 and low concentrations of IL-6 and IL-10. The low concentration of sputum IL-6 is unique for CF and distinct from that observed in other chronic pulmonary inflammatory diseases. These findings strongly suggest that expectorated sputum is an informative source of pulmonary biomarkers representative for advanced CF and may replace more invasive bronchoalveolar lavage analysis to monitor the disease. We recommend to use of the following inflammatory biomarkers: blood CRP, NLR and sputum elastase, IL-6, IL-8 and IL-10.
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Affiliation(s)
- Grzegorz Majka
- Faculty of Medicine, Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Henryk Mazurek
- Department of Pneumonology and Cystic Fibrosis, Institute of Tuberculosis and Lung Disorders, Rabka-Zdrój, Poland
| | - Magdalena Strus
- Faculty of Medicine, Department of Microbiology, Jagiellonian University Medical College, Kraków, Poland
| | - Marta Ciszek-Lenda
- Faculty of Medicine, Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Rafał Szatanek
- Faculty of Medicine, Institute of Pediatrics, Department of Clinical Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Agnieszka Pac
- Faculty of Medicine, Chair of Epidemiology and Preventive Medicine, Department of Epidemiology, Jagiellonian University Medical College, Kraków, Poland
| | - Edyta Golińska
- Faculty of Medicine, Department of Microbiology, Jagiellonian University Medical College, Kraków, Poland
| | - Janusz Marcinkiewicz
- Faculty of Medicine, Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
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9
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Wagner Mackenzie B, Dassi C, Vivekanandan A, Zoing M, Douglas RG, Biswas K. Longitudinal analysis of sinus microbiota post endoscopic surgery in patients with cystic fibrosis and chronic rhinosinusitis: a pilot study. Respir Res 2021; 22:106. [PMID: 33849523 PMCID: PMC8045235 DOI: 10.1186/s12931-021-01697-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/29/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cystic fibrosis is a debilitating, autosomal recessive disease which results in chronic upper and lower airway infection and inflammation. In this study, four adult patients presenting with cystic fibrosis and chronic rhinosinusitis were recruited. Culture and molecular techniques were employed to evaluate changes in microbial profiles, host gene expression and antimicrobial resistance (AMR) in the upper respiratory tract over time. METHODS Swab samples from the sinonasal cavity were collected at the time of surgery and at follow-up clinics at regular time intervals for up to 18 months. Nucleic acids were extracted, and DNA amplicon sequencing was applied to describe bacterial and fungal composition. In parallel, RNA was used to evaluate the expression of 17 AMR genes and two inflammatory markers (interleukins 6 and 8) using custom qPCR array cards. Molecular results were compared with routine sinus and sputum culture reports within each patient. RESULTS Bacterial amplicon sequencing and swab culture reports from the sinonasal cavity were mostly congruent and relatively stable for each patient across time. The predominant species detected in patients P02 and P04 were Pseudomonas aeruginosa, Staphylococcus aureus in patient P03, and a mixture of Enterobacter and S. aureus in patient P01. Fungal profiles were variable and less subject specific than bacterial communities. Increased expressions of interleukins 6 and 8 were observed in all patients throughout the sampling period compared with other measured genes. The most prevalent AMR gene detected was ampC. However, the prevalence of AMR gene expression was low in all patient samples across varying time-points. CONCLUSIONS We observed a surprising degree of stability of sinonasal microbial composition, and inflammatory and AMR gene expression across all patients post sinus surgery.
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Affiliation(s)
- Brett Wagner Mackenzie
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand.
| | - Camila Dassi
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand
| | - Anitha Vivekanandan
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand
| | - Melissa Zoing
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand
| | - Richard G Douglas
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand
| | - Kristi Biswas
- Department of Surgery, The University of Auckland, 85 Park Road, Grafton, 1023, Auckland, New Zealand
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Ghaffaripour H, Mirkarimi M, Hassanzad M, Boloursaz M, Mohammadi S. Evaluation of Inflammatory Biomarkers in Iranian Patients with Cystic Fibrosis. CURRENT RESPIRATORY MEDICINE REVIEWS 2021. [DOI: 10.2174/1573398x16999201026223411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background::
Cystic fibrosis (CF) is an autosomal recessive disease characterized by a
progressive and recurrent lung infection.
Objective::
This study aimed to evaluate the levels of pro-inflammatory cytokines and their correlations
with lung function in CF patients.
Methods::
A matched case-control study was conducted among 18 CF (children and adults) and 18
control patients (age and gender-matched) who were admitted to Masih Daneshvari Hospital
(Tehran, Iran). The controls had no obvious inflammatory lung disease. The samples of bronchoalveolar
lavage (BAL) fluid, serum, and sputum of participants were collected to determine concentrations
of inflammatory cytokines such as interleukins (IL-8, IL-1β) and tumour necrosis factor-
alpha (TNF-α) using enzyme-linked immunosorbent assay (ELISA). Spirometry was applied
and functional pulmonary indices [forced vital capacity (FVC) and forced expiratory volume in 1
second (FEV1)] were assessed.
Results::
The mean age of CF patients was 15.43 ± 5.970 years (range 4-24). The FVC in a majority
of the CF patients (66.7%) was below 60% and only 33.3% of the patients exhibited normal or
mild respiratory dysfunction. There were significant differences between FVC and FEV1 measurements
before and after bronchoscopy. In addition, IL-8 levels in all three samples (serum, sputum,
and BAL) of CF patients and levels of IL-1β and TNF-α in BAL and sputum samples of CF patients
were significantly higher than the control group (p<0.001). However, increased cytokine levels
were not associated with lung function.
Conclusion::
Increased IL-8 and TNF-α levels seemed to be associated with signs of clinical deterioration
and might be useful as diagnostic markers.
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Affiliation(s)
- Hosseinali Ghaffaripour
- Pediatric Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Mirkarimi
- Pediatric Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Hassanzad
- Pediatric Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammadreza Boloursaz
- Pediatric Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Masih Daneshvari Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shooka Mohammadi
- Department of Pediatrics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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11
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Development of a Human Respiratory Mucosa-on-a-chip using Decellularized Extracellular Matrix. BIOCHIP JOURNAL 2020. [DOI: 10.1007/s13206-020-4306-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Currie AJ, Main ET, Wilson HM, Armstrong-James D, Warris A. CFTR Modulators Dampen Aspergillus-Induced Reactive Oxygen Species Production by Cystic Fibrosis Phagocytes. Front Cell Infect Microbiol 2020; 10:372. [PMID: 32793514 PMCID: PMC7393064 DOI: 10.3389/fcimb.2020.00372] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 06/17/2020] [Indexed: 12/17/2022] Open
Abstract
Excessive inflammation by phagocytes during Aspergillus fumigatus infection is thought to promote lung function decline in CF patients. CFTR modulators have been shown to reduce A. fumigatus colonization in vivo, however, their antifungal and anti-inflammatory mechanisms are unclear. Other treatments including azithromycin and acebilustat may dampen Aspergillus-induced inflammation due to their immunomodulatory properties. Therefore, we set out in this study to determine the effects of current CF therapies on ROS production and fungal killing, either direct or indirect by enhancing antifungal immune mechanisms in peripheral blood immune cells from CF patients upon A. fumigatus infection. Isolated peripheral blood mononuclear cells (PBMCs) and polymorphonuclear cells (PMNs) from CF patients and healthy volunteers were challenged with A. fumigatus following pre-treatment with CFTR modulators, azithromycin or acebilustat. Ivacaftor/lumacaftor treated CF and control subject PMNs resulted in a significant reduction (p < 0.05) in Aspergillus-induced ROS. For CF PBMC, Aspergillus-induced ROS was significantly reduced when pre-treated with ivacaftor alone (p < 0.01) or in combination with lumacaftor (p < 0.01), with a comparable significant reduction in control subject PBMC (p < 0.05). Azithromycin and acebilustat had no effect on ROS production by CF or control subject phagocytes. None of the treatments showed an indirect or direct antifungal activity. In summary, CFTR modulators have potential for additional immunomodulatory benefits to prevent or treat Aspergillus-induced inflammation in CF. The comparable effects of CFTR modulators observed in phagocytes from control subjects questions their exact mechanism of action.
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Affiliation(s)
- Alexander J Currie
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom.,Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
| | - Ellen T Main
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Heather M Wilson
- Aberdeen Fungal Group, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | | | - Adilia Warris
- Medical Research Council Centre for Medical Mycology, University of Exeter, Exeter, United Kingdom
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13
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Castaldo A, Iacotucci P, Carnovale V, Cimino R, Liguori R, Comegna M, Raia V, Corso G, Castaldo G, Gelzo M. Salivary Cytokines and Airways Disease Severity in Patients with Cystic Fibrosis. Diagnostics (Basel) 2020; 10:diagnostics10040222. [PMID: 32326546 PMCID: PMC7235910 DOI: 10.3390/diagnostics10040222] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/31/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023] Open
Abstract
About 50% of patients with cystic fibrosis (CF) have sinonasal complications, which include inferior turbinate hypertrophy (NTH) and/or nasal polyposis (NP), and different degrees of lung disease, which represents the main cause of mortality. Monitoring of sinonasal disease requires complex instrumental procedures, while monitoring of lung inflammation requires invasive collection of bronchoalveolar lavage fluid. The aim of this study was to investigate the associations between salivary cytokines levels and CF-related airway diseases. Salivary biochemical parameters and cytokines, i.e., interleukin-6 (IL-6), IL-8, and tumor necrosis factor alpha (TNF-α), were analyzed in resting saliva from healthy subjects and patients with CF. Patients with CF showed significantly higher levels of salivary chloride, IL-6, IL-8, and TNF-α and lower calcium levels than healthy subjects. Among patients with CF, IL-6 and IL-8 were significantly higher in patients with NTH, while TNF-α was significantly lower in patients with NP. A decreasing trend of TNF-α in patients with severe lung disease was also observed. On the other hand, we did not find significant correlation between cytokine levels and Pseudomonas aeruginosa or Stenotrophomonas maltophilia colonization. These preliminary results suggest that salivary IL-6 and IL-8 levels increase during the acute phase of sinonasal disease (i.e., NTH), while the end stages of pulmonary disease and sinonasal disease (i.e., NP) show decreased TNF-α levels.
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Affiliation(s)
- Alice Castaldo
- Dipartimento di Scienze Mediche Traslazionali, University of Naples Federico II, 80131 Naples, Italy; (A.C.); (P.I.); (V.C.); (V.R.)
| | - Paola Iacotucci
- Dipartimento di Scienze Mediche Traslazionali, University of Naples Federico II, 80131 Naples, Italy; (A.C.); (P.I.); (V.C.); (V.R.)
| | - Vincenzo Carnovale
- Dipartimento di Scienze Mediche Traslazionali, University of Naples Federico II, 80131 Naples, Italy; (A.C.); (P.I.); (V.C.); (V.R.)
| | - Roberta Cimino
- Dipartimento di Neuroscienze, Scienze Riproduttive ed Odontostomatologiche, University of Naples Federico II, 80131 Naples, Italy;
| | - Renato Liguori
- Dipartimento di Scienze e Tecnologie, University of Naples Parthenope, 80133 Naples, Italy;
| | - Marika Comegna
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, University of Naples Federico II, 80138 Naples, Italy; (M.C.); (M.G.)
- CEINGE-Biotecnologie Avanzate, 80145 Naples, Italy
| | - Valeria Raia
- Dipartimento di Scienze Mediche Traslazionali, University of Naples Federico II, 80131 Naples, Italy; (A.C.); (P.I.); (V.C.); (V.R.)
| | - Gaetano Corso
- Dipartimento di Medicina Clinica e Sperimentale, University of Foggia, 71122 Foggia, Italy;
| | - Giuseppe Castaldo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, University of Naples Federico II, 80138 Naples, Italy; (M.C.); (M.G.)
- CEINGE-Biotecnologie Avanzate, 80145 Naples, Italy
- Correspondence:
| | - Monica Gelzo
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, University of Naples Federico II, 80138 Naples, Italy; (M.C.); (M.G.)
- CEINGE-Biotecnologie Avanzate, 80145 Naples, Italy
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14
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Laucirica DR, Garratt LW, Kicic A. Progress in Model Systems of Cystic Fibrosis Mucosal Inflammation to Understand Aberrant Neutrophil Activity. Front Immunol 2020; 11:595. [PMID: 32318073 PMCID: PMC7154161 DOI: 10.3389/fimmu.2020.00595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/13/2020] [Indexed: 12/18/2022] Open
Abstract
In response to recurrent infection in cystic fibrosis (CF), powerful innate immune signals trigger polymorphonuclear neutrophil recruitment into the airway lumen. Exaggerated neutrophil proteolytic activity results in sustained inflammation and scarring of the airways. Consequently, neutrophils and their secretions are reliable clinical biomarkers of lung disease progression. As neutrophils are required to clear infection and yet a direct cause of airway damage, modulating adverse neutrophil activity while preserving their pathogen fighting function remains a key area of CF research. The factors that drive their pathological behavior are still under investigation, especially in early disease when aberrant neutrophil behavior first becomes evident. Here we examine the latest findings of neutrophils in pediatric CF lung disease and proposed mechanisms of their pathogenicity. Highlighted in this review are current and emerging experimental methods for assessing CF mucosal immunity and human neutrophil function in the laboratory.
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Affiliation(s)
- Daniel R Laucirica
- Faculty of Health and Medical Sciences, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Luke W Garratt
- Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia
| | - Anthony Kicic
- Faculty of Health and Medical Sciences, University of Western Australia, Nedlands, WA, Australia.,Telethon Kids Institute, University of Western Australia, Nedlands, WA, Australia.,Department of Respiratory and Sleep Medicine, Perth Children's Hospital, Nedlands, WA, Australia.,School of Public Health, Curtin University, Bentley, WA, Australia
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15
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Carbone A, Montalbano A, Spanò V, Musante I, Galietta LJV, Barraja P. Furocoumarins as multi-target agents in the treatment of cystic fibrosis. Eur J Med Chem 2019; 180:283-290. [PMID: 31319264 DOI: 10.1016/j.ejmech.2019.07.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/07/2019] [Accepted: 07/07/2019] [Indexed: 02/06/2023]
Abstract
Multi-target molecular entities, offer a path to progress both in understanding causes of disease and in defining effective small molecule treatments. Coumarin and its derivatives belong to an important group of natural compounds with diverse biological properties. They are found in vegetables and plants for which literature reports thousands of publications for the great variety of biological applications among which the photoprotective effects, thus being considered multi-targeting agents. Their furan condensed analogues constitute the family of furocoumarins, less represented in the literature, endowed with photosensitizing properties and often used for the treatment of skin diseases such as vitiligo and psoriasis. Despite the study of biological properties of linear and angular furocumarins dates back to ancient times, mainly as photosensitizers, these small molecules still represent an attractive scaffold for further development and applications in several therapeutic fields. The aim of the present review is to summarize the most promising chemical entities belonging to the class of furocumarins and coumarins, emerged in the last decades, and the methods used for their synthesis with a particular focus on main targets involved in the cystic fibrosis treatment.
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Affiliation(s)
- Anna Carbone
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 32, 90123, Palermo, Italy
| | - Alessandra Montalbano
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 32, 90123, Palermo, Italy
| | - Virginia Spanò
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 32, 90123, Palermo, Italy
| | - Ilaria Musante
- Telethon Institute of Genetics and Medicine (TIGEM), Campi Flegrei 34, 80078, Pozzuoli, NA, Italy
| | - Luis J V Galietta
- Telethon Institute of Genetics and Medicine (TIGEM), Campi Flegrei 34, 80078, Pozzuoli, NA, Italy; Department of Translational Medical Sciences (DISMET), University of Naples, "Federico II", 80131, Naples, Italy
| | - Paola Barraja
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Via Archirafi 32, 90123, Palermo, Italy.
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16
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Hao S, Roesch EA, Perez A, Weiner RL, Henderson LC, Cummings L, Consiglio P, Pajka J, Eisenberg A, Yeh L, Cotton CU, Drumm ML. Inactivation of CFTR by CRISPR/Cas9 alters transcriptional regulation of inflammatory pathways and other networks. J Cyst Fibros 2019; 19:34-39. [PMID: 31126900 DOI: 10.1016/j.jcf.2019.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/24/2019] [Accepted: 05/02/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Individuals with cystic fibrosis (CF) experience elevated inflammation in multiple organs, but whether this reflects an inherent feature of CF cells or is a consequence of a pro-inflammatory environment is not clear. METHOD Using CRISPR/Cas9-mediated mutagenesis of CFTR, 17 subclonal cell lines were generated from Caco-2 cells. Clonal lines with functional CFTR (CFTR+) were compared to those without (CFTR-) to directly address the role of CFTR in inflammatory gene regulation. RESULTS All lines maintained CFTR mRNA production and formation of tight junctions. CFTR+ lines displayed short circuit currents in response to forskolin, while the CFTR- lines did not. Baseline expression of cytokines IL6 and CXCL8 (IL8) was not different between the lines regardless of CFTR genotype. All lines responded to TNFα and IL1β by increasing IL6 and CXCL8 mRNA levels, but the CFTR- lines produced more CXCL8 mRNA than the CFTR+ lines. Transcriptomes of 6 CFTR- and 6 CFTR+ lines, before and after stimulation by TNFα, were compared for differential expression as a function of CFTR genotype. While some genes appeared to be differentially expressed simply because of CFTR's absence, others required stimulation for differences to be apparent. CONCLUSION Together, these data suggest cells respond to CFTR's absence by modulating transcriptional networks, some of which are only apparent when cells are exposed to different environmental contexts, such as inflammation. With regards to inflammation, these data suggest a model in which CFTR's absence leads to a poised, pro-inflammatory state of cells that is only revealed by stimulation.
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Affiliation(s)
- Shuyu Hao
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Erica A Roesch
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Aura Perez
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Rebecca L Weiner
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Leigh C Henderson
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Linda Cummings
- Department of Medicine, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Paul Consiglio
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Joseph Pajka
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Amy Eisenberg
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Lauren Yeh
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Calvin U Cotton
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America; Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44106, United States of America
| | - Mitchell L Drumm
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH 44106, United States of America; Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44106, United States of America.
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17
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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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18
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Totani L, Plebani R, Piccoli A, Di Silvestre S, Lanuti P, Recchiuti A, Cianci E, Dell'Elba G, Sacchetti S, Patruno S, Guarnieri S, Mariggiò MA, Mari VC, Anile M, Venuta F, Del Porto P, Moretti P, Prioletta M, Mucilli F, Marchisio M, Pandolfi A, Evangelista V, Romano M. Mechanisms of endothelial cell dysfunction in cystic fibrosis. Biochim Biophys Acta Mol Basis Dis 2017; 1863:3243-3253. [PMID: 28847515 DOI: 10.1016/j.bbadis.2017.08.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 06/24/2017] [Accepted: 08/13/2017] [Indexed: 12/18/2022]
Abstract
Although cystic fibrosis (CF) patients exhibit signs of endothelial perturbation, the functions of the cystic fibrosis conductance regulator (CFTR) in vascular endothelial cells (EC) are poorly defined. We sought to uncover biological activities of endothelial CFTR, relevant for vascular homeostasis and inflammation. We examined cells from human umbilical cords (HUVEC) and pulmonary artery isolated from non-cystic fibrosis (PAEC) and CF human lungs (CF-PAEC), under static conditions or physiological shear. CFTR activity, clearly detected in HUVEC and PAEC, was markedly reduced in CF-PAEC. CFTR blockade increased endothelial permeability to macromolecules and reduced trans‑endothelial electrical resistance (TEER). Consistent with this, CF-PAEC displayed lower TEER compared to PAEC. Under shear, CFTR blockade reduced VE-cadherin and p120 catenin membrane expression and triggered the formation of paxillin- and vinculin-enriched membrane blebs that evolved in shrinking of the cell body and disruption of cell-cell contacts. These changes were accompanied by enhanced release of microvesicles, which displayed reduced capability to stimulate proliferation in recipient EC. CFTR blockade also suppressed insulin-induced NO generation by EC, likely by inhibiting eNOS and AKT phosphorylation, whereas it enhanced IL-8 release. Remarkably, phosphodiesterase inhibitors in combination with a β2 adrenergic receptor agonist corrected functional and morphological changes triggered by CFTR dysfunction in EC. Our results uncover regulatory functions of CFTR in EC, suggesting a physiological role of CFTR in the maintenance EC homeostasis and its involvement in pathogenetic aspects of CF. Moreover, our findings open avenues for novel pharmacology to control endothelial dysfunction and its consequences in CF.
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Affiliation(s)
- Licia Totani
- Laboratory of Vascular Biology and Pharmacology, Fondazione Mario Negri Sud, Santa Maria Imbaro (CH), Italy
| | - Roberto Plebani
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Antonio Piccoli
- Laboratory of Vascular Biology and Pharmacology, Fondazione Mario Negri Sud, Santa Maria Imbaro (CH), Italy
| | - Sara Di Silvestre
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Paola Lanuti
- Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy; Department of Medicine and Aging Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Antonio Recchiuti
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Eleonora Cianci
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Giuseppe Dell'Elba
- Laboratory of Vascular Biology and Pharmacology, Fondazione Mario Negri Sud, Santa Maria Imbaro (CH), Italy
| | - Silvio Sacchetti
- Center for Synaptic Neuroscience, Italian Institute of Technology, Genoa, Italy
| | - Sara Patruno
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Simone Guarnieri
- Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy; Department of Neurosciences, Imaging and Clinical Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Maria A Mariggiò
- Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy; Department of Neurosciences, Imaging and Clinical Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Veronica C Mari
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Marco Anile
- Department of Thoracic Surgery, University of Rome "Sapienza", Rome, Italy
| | - Federico Venuta
- Department of Thoracic Surgery, University of Rome "Sapienza", Rome, Italy
| | - Paola Del Porto
- Department of Biology and Biotechnology "Charles Darwin", Sapienza University, Rome, Italy
| | - Paolo Moretti
- Cystic Fibrosis Center, S. Liberatore Hospital, Atri, TE, Italy
| | - Marco Prioletta
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Felice Mucilli
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Marco Marchisio
- Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy; Department of Medicine and Aging Sciences, G. D'Annunzio University, Chieti-Pescara, Italy
| | - Assunta Pandolfi
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy
| | - Virgilio Evangelista
- Laboratory of Vascular Biology and Pharmacology, Fondazione Mario Negri Sud, Santa Maria Imbaro (CH), Italy
| | - Mario Romano
- Department of Medical, Oral and Biotechnological Sciences, G. D'Annunzio University, Chieti-Pescara, Italy; Center on Aging Sciences and Translational Medicine (CeSI-MeT), G. D'Annunzio University, Chieti-Pescara, Italy.
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19
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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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20
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Na K, Lee M, Shin HW, Chung S. In vitro nasal mucosa gland-like structure formation on a chip. LAB ON A CHIP 2017; 17:1578-1584. [PMID: 28379223 DOI: 10.1039/c6lc01564f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The emergence of microfluidic epithelial models using diverse types of cells within a physiologically relevant microenvironment has the potential to be a powerful tool for preclinical drug screening and pathophysiological studies. However, to date, few studies have reported the development of a complicated in vitro human nasal epithelial model. The aim of this study was to produce an in vitro human nasal mucosa model for reliable drug screening and clinical applications. Here, we integrated and optimized several culture conditions such as cell type, airway culture conditions, and hydrogel scaffolds into a microfluidic chip to construct an advanced in vitro human nasal mucosa model. We observed that the inducing factors for nasal gland-like structures were secreted from activated human dermal microvascular endothelial cells. Furthermore, our in vitro nasal mucosa presented different appearance and characteristics under hypoxic conditions. Morphological and functional similarities between in vivo nasal mucosa and our model indicated its utilization as a reliable research model for nasal diseases including allergic rhinitis, chronic sinusitis, and nasal polyposis.
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Affiliation(s)
- Kyuhwan Na
- School of Mechanical Engineering, Korea University, Seoul, Korea.
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21
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Billard L, Le Berre R, Pilorgé L, Payan C, Héry-Arnaud G, Vallet S. Viruses in cystic fibrosis patients' airways. Crit Rev Microbiol 2017; 43:690-708. [PMID: 28340310 DOI: 10.1080/1040841x.2017.1297763] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Although bacteria have historically been considered to play a major role in cystic fibrosis (CF) airway damage, a strong impact of respiratory viral infections (RVI) is also now recognized. Emerging evidence confirms that respiratory viruses are associated with deterioration of pulmonary function and exacerbation and facilitation of bacterial colonization in CF patients. The aim of this review is to provide an overview of the current knowledge on respiratory viruses in CF airways, to discuss the resulting inflammation and RVI response, to determine how to detect the viruses, and to assess their clinical consequences, prevalence, and interactions with bacteria. The most predominant are Rhinoviruses (RVs), significantly associated with CF exacerbation. Molecular techniques, and especially multiplex PCR, help to diagnose viral infections, and the coming rise of metagenomics will extend knowledge of viral populations in the complex ecosystem of CF airways. Prophylaxis and vaccination are currently available only for Respiratory syncytial and Influenza virus (IV), but antiviral molecules are being tested to improve CF patients' care. All the points raised in this review highlight the importance of taking account of RVIs and their potential impact on the CF airway ecosystem.
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Affiliation(s)
- Lisa Billard
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France
| | - Rozenn Le Berre
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France.,b Département de Médecine Interne et Pneumologie , Centre Hospitalier Régional et Universitaire de Brest, Hôpital de la Cavale Blanche , Brest cedex , France
| | - Léa Pilorgé
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France.,c Département de Bacteriologie-Virologie, Hygiène et Parasitologie-Mycologie, Pôle de Biologie-Pathologie , Centre Hospitalier Régional et Universitaire de Brest, Hôpital de la Cavale Blanche , Brest cedex , France
| | - Christopher Payan
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France.,c Département de Bacteriologie-Virologie, Hygiène et Parasitologie-Mycologie, Pôle de Biologie-Pathologie , Centre Hospitalier Régional et Universitaire de Brest, Hôpital de la Cavale Blanche , Brest cedex , France
| | - Geneviève Héry-Arnaud
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France.,c Département de Bacteriologie-Virologie, Hygiène et Parasitologie-Mycologie, Pôle de Biologie-Pathologie , Centre Hospitalier Régional et Universitaire de Brest, Hôpital de la Cavale Blanche , Brest cedex , France
| | - Sophie Vallet
- a EA 3882-Laboratoire Universitaire de Biodiversité et Ecologie Microbienne (LUBEM) , Groupe de Bactériologie-Virologie, Faculté de Médecine et des Sciences de la Santé , Université Bretagne Loire , Brest Cedex , France.,c Département de Bacteriologie-Virologie, Hygiène et Parasitologie-Mycologie, Pôle de Biologie-Pathologie , Centre Hospitalier Régional et Universitaire de Brest, Hôpital de la Cavale Blanche , Brest cedex , France
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Liu K, Zhang X, Zhang JT, Tsang LL, Jiang X, Chan HC. Defective CFTR- β-catenin interaction promotes NF-κB nuclear translocation and intestinal inflammation in cystic fibrosis. Oncotarget 2016; 7:64030-64042. [PMID: 27588407 PMCID: PMC5325423 DOI: 10.18632/oncotarget.11747] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 08/24/2016] [Indexed: 12/31/2022] Open
Abstract
While inflammation with aberrant activation of NF-κB pathway is a hallmark of cystic fibrosis (CF), the molecular mechanisms underlying the link between CFTR defect and activation of NF-κB-mediated pro-inflammatory response remain elusive. Here, we investigated the link between CFTR defect and NF-κB activation in ΔF508cftr-/- mouse intestine and human intestinal epithelial cell lines. Our results show that the NF-κB/COX-2/PGE2 pathway is activated whereas the β-catenin pathway is suppressed in CF mouse intestine and CFTR-knockdown cells. Activation of β-catenin pathway by GSK3 inhibitors suppresses CFTR mutation/knockdown-induced NF-κB/COX-2/PGE2 pathway in ΔF508 mouse intestine and CFTR-knockdown cells. In contrast, suppression of β-catenin signaling induces the nuclear translocation of NF-κB. In addition, CFTR co-localizes and interacts with β-catenin while CFTR mutation disrupts the interaction between NF-κB and β-catenin in mouse intestine. Treatment with proteasome inhibitor MG132 completely reverses the reduced expression of β-catenin in Caco-2 cells. Collectively, these results indicate that CFTR stabilizes β-catenin and prevents its degradation, defect of which results in the activation of NF-κB-mediated inflammatory cascade. The present study has demonstrated a previously unsuspected interaction between CFTR and β-catenin that regulates NF-κB nuclear translocation in mouse intestine. Therefore, our study provides novel insights into the physiological function of CFTR and pathogenesis of CF-related diseases in addition to the NF-κB-mediated intestinal inflammation seen in CF.
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Affiliation(s)
- Kaisheng Liu
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
| | - Xiaohu Zhang
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
- Sichuan University-The Chinese University of Hong Kong Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Chengdu, PR China
| | - Jie Ting Zhang
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
| | - Lai Ling Tsang
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
| | - Xiaohua Jiang
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
- School of Biomedical Sciences Core Laboratory, Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, PR China
| | - Hsiao Chang Chan
- Epithelial Cell Biology Research Center, Key Laboratory for Regenerative Medicine of the Ministry of Education of China, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China
- School of Biomedical Sciences Core Laboratory, Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, PR China
- Sichuan University-The Chinese University of Hong Kong Joint Laboratory for Reproductive Medicine, West China Second University Hospital, Chengdu, PR China
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Crites KSM, Morin G, Orlando V, Patey N, Cantin C, Martel J, Brochiero E, Mailhot G. CFTR Knockdown induces proinflammatory changes in intestinal epithelial cells. JOURNAL OF INFLAMMATION-LONDON 2015; 12:62. [PMID: 26549988 PMCID: PMC4636765 DOI: 10.1186/s12950-015-0107-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 11/05/2015] [Indexed: 12/20/2022]
Abstract
Background Hyperinflammation is a hallmark feature of cystic fibrosis (CF) airways. However, inflammation has also been documented systemically and, more recently, in extrapulmonary CF-affected tissues such as the pancreas and intestine. The pathogenesis of CF-related inflammation and more specifically the role of the cystic fibrosis transmembrane conductance regulator (CFTR) in that respect are not entirely understood. We have tested the hypothesis that genetic depletion of CFTR will affect the inflammatory status of human intestinal epithelial cell lines. Methods CFTR expression was genetically depleted from Caco-2/15 and HT-29 cells using short hairpin RNA interference (shRNAi). Inflammatory conditions were induced by the addition of human recombinant tumor necrosis factor (TNF) or Interleukin-1β (IL-1β) for various periods of time. Gene expression, mRNA stability and secreted levels of interleukin (IL)-6, −8 and 10 were assessed. Analysis of pro- and anti-inflammatory signaling pathways including mitogen-activated protein kinases (p38, ERK 1/2 and JNK), nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor alpha (IκBα), and nuclear factor-kappa B (NF-κB) was also performed. Eosinophils were counted in the jejunal mucosa of Cftr−/− and Cftr+/+ mice. Results CFTR gene and protein knockdown caused a significant increase in basal secretion of IL-8 as well as in IL-1β-induced secretion of IL-6 and −8. Release of the anti-inflammatory cytokine, IL-10, remained unaffected by CFTR depletion. The enhanced secretion of IL-8 stems in part from increased IL8 mRNA levels and greater activation of ERK1/2 MAPK, IκBα and NF-κB in the CFTR knockdown cells. By contrast, phosphorylation levels of p38 and JNK MAPK did not differ between control and knockdown cells. We also found a higher number of infiltrating eosinophils in the jejunal mucosa of Cftr −/− females, but not males, compared to Cftr +/+ mice, thus providing in vivo support to our in vitro findings. Conclusion Collectively, these data underscore the role played by CFTR in regulating the intestinal inflammatory responses. Such findings lend support to the theory that CFTR exerts functions that may go beyond its role as a chloride channel whereby its disruption may prevent cells to optimally respond to exogenous or endogenous challenges. These observations are of particular interest to CF patients who were found to display alterations in their intestinal microbiota, thus predisposing them to pathogens that may elicit exaggerated inflammatory responses. Electronic supplementary material The online version of this article (doi:10.1186/s12950-015-0107-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Geneviève Morin
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada
| | - Valérie Orlando
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada
| | - Natacha Patey
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada
| | - Catherine Cantin
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada
| | - Judith Martel
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada
| | - Emmanuelle Brochiero
- Research Center, CHUM, 900 Saint-Denis Street, Montreal, Quebec H2X 0A9 Canada ; Department of Medicine, Université de Montreal, 2900, Édouard-Montpetit Blvd, Montreal, Quebec H3T 1J4 Canada
| | - Geneviève Mailhot
- Research Centre, CHU Sainte-Justine, 3175 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1C5 Canada ; Department of Nutrition, Université de Montreal, 2405 Cote Sainte-Catherine Rd, Montreal, Quebec H3T 1A8 Canada
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Jundi K, Greene CM. Transcription of Interleukin-8: How Altered Regulation Can Affect Cystic Fibrosis Lung Disease. Biomolecules 2015; 5:1386-98. [PMID: 26140537 PMCID: PMC4598756 DOI: 10.3390/biom5031386] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 06/19/2015] [Accepted: 06/20/2015] [Indexed: 02/07/2023] Open
Abstract
Interleukin-8 (IL-8) is a neutrophil chemokine that is encoded on the CXCL8 gene. Normally CXCL8 expression is repressed due to histone deacetylation, octamer-1 binding to the promoter and the inhibitory effect of nuclear factor-κB repressing factor (NRF). However, in response to a suitable stimulus, the human CXCL8 gene undergoes transcription due to its inducible promoter that is regulated by the transcription factors nuclear factor-κB (NF-κB), activating protein (AP-1), CAAT/enhancer-binding protein β (C/EBPβ, also known as NF-IL-6), C/EBP homologous protein (CHOP) and cAMP response element binding protein (CREB). CXCL8 mRNA is then stabilised by the activity of p38 mitogen-activated protein kinase (p38 MAPK). Cystic fibrosis (CF) lung disease is characterised by a neutrophil-dominated airway inflammatory response. A major factor contributing to the large number of neutrophils is the higher than normal levels of IL-8 that are present within the CF lung. Infection and inflammation, together with intrinsic alterations in CF airway cells are responsible for the abnormally high intrapulmonary levels of IL-8. Strategies to inhibit aberrantly high CXCL8 expression hold therapeutic potential for CF lung disease.
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Affiliation(s)
- Karim Jundi
- Department of Medicine, Respiratory Research Division, Royal College of Surgeons in Ireland Education and Research Centre, Beaumont Hospital, Dublin 9, Ireland.
| | - Catherine M Greene
- Department of Medicine, Respiratory Research Division, Royal College of Surgeons in Ireland Education and Research Centre, Beaumont Hospital, Dublin 9, Ireland.
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Bannon A, Zhang SD, Schock BC, Ennis M. Cystic Fibrosis from Laboratory to Bedside: The Role of A20 in NF-κB-Mediated Inflammation. Med Princ Pract 2015; 24:301-10. [PMID: 25925366 PMCID: PMC5588248 DOI: 10.1159/000381423] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 03/05/2015] [Indexed: 01/28/2023] Open
Abstract
Cystic fibrosis (CF) is a lifelong, inflammatory multi-organ disease and the most common lethal, genetic condition in Caucasian populations, with a median survival rate of 41.5 years. Pulmonary disease, characterized by infective exacerbations, bronchiectasis and increasing airway insufficiency is the most serious manifestation of this disease process, currently responsible for over 80% of CF deaths. Chronic dysregulation of the innate immune and host inflammatory response has been proposed as a mechanism central to this genetic condition, primarily driven by the nuclear factor κB (NF-κB) pathway. Chronic activation of this transcription factor complex leads to the production of pro-inflammatory cytokines and mediators such as IL-6, IL-8 and TNF-α. A20 has been described as a central and inducible negative regulator of NF-κB. This intracellular molecule negatively regulates NF-κB-driven pro-inflammatory signalling upon toll-like receptor activation at the level of TRAF6 activation. Silencing of A20 increases cellular levels of p65 and induces a pro-inflammatory state. We have previously shown that A20 expression positively correlates with lung function (FEV1%) in CF. Despite improvement in survival rates in recent years, advancements in available therapies have been incremental. We demonstrate that the experimental use of naturally occurring plant diterpenes such as gibberellin on lipopolysaccharide-stimulated cell lines reduces IL-8 release in an A20-dependent manner. We discuss how the use of a novel bio-informatics gene expression connectivity-mapping technique to identify small molecule compounds that similarly mimic the action of A20 may lead to the development of new therapeutic approaches capable of reducing chronic airway inflammation in CF.
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Affiliation(s)
- Aidan Bannon
- Centre for Infection and Immunity, Queen's University Belfast, Belfast, UK
| | - Shu-Dong Zhang
- Centre for Cancer Research and Cell Biology, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, UK
| | - Bettina C. Schock
- Centre for Infection and Immunity, Queen's University Belfast, Belfast, UK
| | - Madeleine Ennis
- Centre for Infection and Immunity, Queen's University Belfast, Belfast, UK
- *Prof. Madeleine Ennis, Centre for Infection and Immunity, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Health Sciences Building, Lisburn Road, Belfast BT9 7AE (UK), E-Mail
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26
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Disruption of interleukin-1β autocrine signaling rescues complex I activity and improves ROS levels in immortalized epithelial cells with impaired cystic fibrosis transmembrane conductance regulator (CFTR) function. PLoS One 2014; 9:e99257. [PMID: 24901709 PMCID: PMC4047112 DOI: 10.1371/journal.pone.0099257] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 05/13/2014] [Indexed: 12/22/2022] Open
Abstract
Patients with cystic fibrosis (CF) have elevated concentration of cytokines in sputum and a general inflammatory condition. In addition, CF cells in culture produce diverse cytokines in excess, including IL-1β. We have previously shown that IL-1β, at low doses (∼30 pM), can stimulate the expression of CFTR in T84 colon carcinoma cells, through NF-κB signaling. However, at higher doses (>2.5 ng/ml, ∼150 pM), IL-1β inhibit CFTR mRNA expression. On the other hand, by using differential display, we found two genes with reduced expression in CF cells, corresponding to the mitochondrial proteins CISD1 and MTND4. The last is a key subunit for the activity of mitochondrial Complex I (mCx-I); accordingly, we later found a reduced mCx-I activity in CF cells. Here we found that IB3-1 cells (CF cells), cultured in serum-free media, secrete 323±5 pg/ml of IL-1β in 24 h vs 127±3 pg/ml for S9 cells (CFTR-corrected IB3-1 cells). Externally added IL-1β (5 ng/ml) reduces the mCx-I activity and increases the mitochondrial (MitoSOX probe) and cellular (DCFH-DA probe) ROS levels of S9 (CFTR-corrected IB3-1 CF cells) or Caco-2/pRSctrl cells (shRNA control cells) to values comparable to those of IB3-1 or Caco-2/pRS26 cells (shRNA specific for CFTR). Treatments of IB3-1 or Caco-2/pRS26 cells with either IL-1β blocking antibody, IL-1 receptor antagonist, IKK inhibitor III (NF-κB pathway) or SB203580 (p38 MAPK pathway), restored the mCx-I activity. In addition, in IB3-1 or Caco-2/pRS26 cells, IL-1β blocking antibody, IKK inhibitor III or SB203580 reduced the mitochondrial ROS levels by ∼50% and the cellular ROS levels near to basal values. The AP-1 inhibitors U0126 (MEK1/2) or SP600125 (JNK1/2/3 inhibitor) had no effects. The results suggest that in these cells IL-1β, through an autocrine effect, acts as a bridge connecting the CFTR with the mCx-I activity and the ROS levels.
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27
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Jacquot J, Tabary O, Clement A. Hyperinflammation in airways of cystic fibrosis patients: what’s new? Expert Rev Mol Diagn 2014; 8:359-63. [DOI: 10.1586/14737159.8.4.359] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Corcoran TE, Thomas KM, Brown S, Myerburg MM, Locke LW, Pilewski JM. Liquid hyper-absorption as a cause of increased DTPA clearance in the cystic fibrosis airway. EJNMMI Res 2013; 3:14. [PMID: 23446051 PMCID: PMC3600668 DOI: 10.1186/2191-219x-3-14] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Accepted: 02/15/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Airway liquid hyper-absorption is a key pathophysiological link between the genetic mutations of cystic fibrosis (CF) and the development of lung disease. Here we consider whether the clearance of radiolabeled diethylene triamine pentaacetic acid (DTPA) might be used to detect changes in airway liquid absorption. METHODS Tc99m-DTPA was added to the apical (luminal) surface of primary human bronchial epithelial cell cultures from CF and non-CF lungs. Liquid absorption rates were assessed using an optical method and compared to DTPA absorption rates. Measurements of transepithelial electrical resistance (TER) were made to determine the effect of epithelial permeability. DTPA absorption was assessed after stimuli known to influence liquid absorption (volume addition and osmotic gradients) and in cultures containing different proportions of CF and non-CF cells. RESULTS DTPA absorption rate was increased in CF cultures matching previous in vivo studies in individuals with CF. DTPA and liquid absorption rates were proportional. There was no relationship between TER and DTPA absorption rate when measured in individual cultures. Apical volume addition increased both DTPA and liquid absorption rates. DTPA absorption increased in a dose-dependent manner after basolateral mannitol addition was used to create transepithelial osmotic gradients favoring liquid absorption. Conversely, apical mannitol (a candidate therapy) slowed DTPA absorption in CF cultures. CONCLUSIONS These results imply that DTPA absorption is directly related to liquid absorption, consistent with increased rates of airway surface liquid absorption in the CF airway, and that modification of liquid absorption from osmotic therapies might be detectable through DTPA absorption measurements in vivo. TRIAL REGISTRATION none.
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Affiliation(s)
- Timothy E Corcoran
- Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, UPMC MUH NW628, 3459 Fifth Ave, Pittsburgh, PA 15213, USA.
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de Courcey F, Zholos AV, Atherton-Watson H, Williams MTS, Canning P, Danahay HL, Elborn JS, Ennis M. Development of primary human nasal epithelial cell cultures for the study of cystic fibrosis pathophysiology. Am J Physiol Cell Physiol 2012; 303:C1173-9. [PMID: 23015550 DOI: 10.1152/ajpcell.00384.2011] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Cultured primary epithelial cells are used to examine inflammation in cystic fibrosis (CF). We describe a new human model system using cultured nasal brushings. Nasal brushings were obtained from 16 F508del homozygous patients and 11 healthy controls. Cells were resuspended in airway epithelial growth medium and seeded onto collagen-coated flasks and membranes for use in patch-clamp, ion transport, and mediator release assays. Viable cultures were obtained with a 75% success rate from subjects with CF and 100% from control subjects. Amiloride-sensitive epithelial Na channel current of similar size was present in both cell types while forskolin-activated CF transmembrane conductance regulator current was lacking in CF cells. In Ussing chambers, cells from CF patients responded to UTP but not to forskolin. Spontaneous and cytomix-stimulated IL-8 release was similar (stimulated 29,448 ± 9,025 pg/ml; control 16,336 ± 3,308 pg/ml CF; means ± SE). Thus nasal epithelial cells from patients with CF can be grown from nasal brushings and used in electrophysiological and mediator release studies in CF research.
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Affiliation(s)
- F de Courcey
- Centre for Infection and Immunity, Queen’s University Belfast, Health Sciences Building, Belfast, UK
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30
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Hampton TH, Ballok AE, Bomberger JM, Rutkowski MR, Barnaby R, Coutermarsh B, Conejo-Garcia JR, O'Toole GA, Stanton BA. Does the F508-CFTR mutation induce a proinflammatory response in human airway epithelial cells? Am J Physiol Lung Cell Mol Physiol 2012; 303:L509-18. [PMID: 22821996 DOI: 10.1152/ajplung.00226.2011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
In the clinical setting, mutations in the cystic fibrosis transmembrane conductance regulator (CFTR) gene enhance the inflammatory response in the lung to Pseudomonas aeruginosa (P. aeruginosa) infection. However, studies on human airway epithelial cells in vitro have produced conflicting results regarding the effect of mutations in CFTR on the inflammatory response to P. aeruginosa, and there are no comprehensive studies evaluating the effect of P. aeruginosa on the inflammatory response in airway epithelial cells with the ΔF508/ΔF508 genotype and their matched CF cell line rescued with wild-type (wt)-CFTR. CFBE41o- cells (ΔF508/ΔF508) and CFBE41o- cells complemented with wt-CFTR (CFBE-wt-CFTR) have been used extensively as an experimental model to study CF. Thus the goal of this study was to examine the effect of P. aeruginosa on gene expression and cytokine/chemokine production in this pair of cells. P. aeruginosa elicited a more robust increase in cytokine and chemokine expression (e.g., IL-8, CXCL1, CXCL2 and TNF-α) in CFBE-wt-CFTR cells compared with CFBE-ΔF508-CFTR cells. These results demonstrate that CFBE41o- cells complemented with wt-CFTR mount a more robust inflammatory response to P. aeruginosa than CFBE41o-ΔF508/ΔF508-CFTR cells. Taken together with other published studies, our data demonstrate that there is no compelling evidence to support the view that mutations in CFTR induce a hyperinflammatory response in human airway epithelial cells in vivo. Although the lungs of patients with CF have abundant levels of proinflammatory cytokines and chemokines, because the lung is populated by immune cells and epithelial cells there is no way to know, a priori, whether airway epithelial cells in the CF lung in vivo are hyperinflammatory in response to P. aeruginosa compared with non-CF lung epithelial cells. Thus studies on human airway epithelial cell lines and primary cells in vitro that propose to examine the effect of mutations in CFTR on the inflammatory response to P. aeruginosa have uncertain clinical significance with regard to CF.
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Affiliation(s)
- Thomas H Hampton
- Dept. of Microbiology and Immunology, The Geisel School of Medicine at Dartmouth, Hanover, NH 03755, USA
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Pongnimitprasert N, Hurtado M, Lamari F, El Benna J, Dupuy C, Fay M, Foglietti MJ, Bernard M, Gougerot-Pocidalo MA, Braut-Boucher F. Implication of NADPH oxidases in the early inflammation process generated by cystic fibrosis cells. ISRN INFLAMMATION 2012; 2012:481432. [PMID: 24049649 PMCID: PMC3765752 DOI: 10.5402/2012/481432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 06/10/2012] [Indexed: 12/31/2022]
Abstract
In cystic fibrosis (CF) patients, pulmonary inflammation is a major cause of morbidity and mortality. The aim of this study was to further investigate whether oxidative stress could be involved in the early inflammatory process associated with CF pathogenesis. We used a model of CFTR defective epithelial cell line (IB3-1) and its reconstituted CFTR control (S9) cell line cultured in various ionic conditions. This study showed that IB3-1 and S9 cells expressed the NADPH oxidases (NOXs) DUOX1/2 and NOX2 at the same level. Nevertheless, several parameters participating in oxidative stress (increased ROS production and apoptosis, decreased total thiol content) were observed in IB3-1 cells cultured in hypertonic environment as compared to S9 cells and were inhibited by diphenyleneiodonium (DPI), a well-known inhibitor of NOXs; besides, increased production of the proinflammatory cytokines IL-6 and IL-8 by IB3-1 cells was also inhibited by DPI as compared to S9 cells. Furthermore, calcium ionophore (A23187), which upregulates DUOX and NOX2 activities, strongly induced oxidative stress and IL-8 and IL-6 overexpression in IB3-1 cells. All these events were suppressed by DPI, supporting the involvement of NOXs in the oxidative stress, which can upregulate proinflammatory cytokine production by the airway CFTR-deficient cells and trigger early pulmonary inflammation in CF patients.
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Affiliation(s)
- Nushjira Pongnimitprasert
- INSERM U-773, Centre de Recherche Biomédicale Bichat, Beaujon (CRB3), Faculté de Médecine Xavier Bichat, Université Paris Diderot Paris 7, 75018 Paris, France ; Département de Biochimie, UFR des Sciences Pharmaceutiques et Biologiques, Université Paris Descartes, Sorbonne Paris Cité, 75006 Paris, France
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Looi K, Sutanto EN, Banerjee B, Garratt L, Ling KM, Foo CJ, Stick SM, Kicic A. Bronchial brushings for investigating airway inflammation and remodelling. Respirology 2011; 16:725-37. [PMID: 21624002 DOI: 10.1111/j.1440-1843.2011.02001.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Asthma is the commonest medical cause for hospital admission for children in Australia, affects more than 300 million people worldwide, and is incurable, severe in large number and refractory to treatment in many. However, there have been no new significant treatments despite intense research and billions of dollars. The advancement in our understanding in this disease has been limited due to its heterogeneity, genetic complexity and has severely been hampered particularly in children by the difficulty in obtaining relevant target organ tissue. This review attempts to provide an overview of the currently used and recently developed/adapted techniques used to obtain lung tissue with specific reference to the airway epithelium.
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Affiliation(s)
- Kevin Looi
- School of Paediatrics and Child Health, Centre for Health Research, The University of Western Australia, Nedlands, Australia
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Shun CT, Lin SK, Hong CY, Huang HM, Liu CM. Hypoxia induces cysteine-rich 61, vascular endothelial growth factor, and interleukin-8 expressions in human nasal polyp fibroblasts: An implication of neutrophils in the pathogenesis of nasal polyposis. Am J Rhinol Allergy 2011; 25:15-8. [PMID: 21711965 DOI: 10.2500/ajra.2011.25.3557] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND The purpose of this article was to elucidate the roles of neutrophils and angiogenesis factors in the pathogenesis of nasal polyposis. The effect of hypoxia on the expressions of angiogenesis factors as cysteine-rich 61 (Cyr61) and vascular endothelial growth factor (VEGF) and neutrophil chemoattractant as interleukin (IL)-8 in nasal polyp fibroblasts (NPFs), and the role of nuclear factor kappa B (NF-kappaB) in this reaction were investigated. The action of Cyr61 on the synthesis of VEGF and IL-8 in NPFs was also examined. METHODS Primary cultures of NPFs were established from nasal polyps (NPs). Productions of Cyr61, VEGF, and IL-8 by NPFs under hypoxia were detected by Western blot (Cyr61 and VEGF) or enzyme-linked immunosorbent assay (ELISA; IL-8). Immunohistochemical staining was used to examine the relation between fibroblastic expression of Cyr61 and neovascularization/neutrophil infiltration in NPs. RESULTS Western blot showed that the hypoxia inducer CoCl(2) stimulated Cyr61 synthesis in NPFs in a time-dependent manner, reaching a peak at 24 hours. Bay-117082 (a specific NF-kappaB inhibitor) attenuated the levels of Cyr61 stimulated by hypoxia. Cyr61 induced IL-8 secretion and VEGF synthesis by NPFs, as evidenced by Western blot and ELISA analysis. Bay-117082 abolished hypoxia-stimulated IL-8 and VEGF synthesis, whereas Cyr61 restored the stimulative effect of hypoxia readily. Immunohistochemical staining revealed the presence of Cyr61 and IL-8 in NPFs. Neutrophils and capillaries aggregating around these NPFs were frequently found. CONCLUSION Under hypoxia, NPFs contribute to NP propagation by expressing Cyr61, which subsequently stimulates VEGF and IL-8 production, leading to angiogenesis and activating neutrophil infiltration in NPs.
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Affiliation(s)
- Chia-Tung Shun
- Department of Forensic Medicine and Pathology, National Taiwan University Hospital, Taipei, Taiwan
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Sutanto EN, Kicic A, Foo CJ, Stevens PT, Mullane D, Knight DA, Stick SM. Innate Inflammatory Responses of Pediatric Cystic Fibrosis Airway Epithelial Cells. Am J Respir Cell Mol Biol 2011; 44:761-7. [DOI: 10.1165/rcmb.2010-0368oc] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Mechanisms of action and clinical application of macrolides as immunomodulatory medications. Clin Microbiol Rev 2010; 23:590-615. [PMID: 20610825 DOI: 10.1128/cmr.00078-09] [Citation(s) in RCA: 438] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Macrolides have diverse biological activities and an ability to modulate inflammation and immunity in eukaryotes without affecting homeostatic immunity. These properties have led to their long-term use in treating neutrophil-dominated inflammation in diffuse panbronchiolitis, bronchiectasis, rhinosinusitis, and cystic fibrosis. These immunomodulatory activities appear to be polymodal, but evidence suggests that many of these effects are due to inhibition of extracellular signal-regulated kinase 1/2 (ERK1/2) phosphorylation and nuclear factor kappa B (NF-kappaB) activation. Macrolides accumulate within cells, suggesting that they may associate with receptors or carriers responsible for the regulation of cell cycle and immunity. A concern is that long-term use of macrolides increases the emergence of antimicrobial resistance. Nonantimicrobial macrolides are now in development as potential immunomodulatory therapies.
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Marwick JA, Adcock IM, Chung KF. Overcoming reduced glucocorticoid sensitivity in airway disease: molecular mechanisms and therapeutic approaches. Drugs 2010; 70:929-48. [PMID: 20481652 DOI: 10.2165/10898520-000000000-00000] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
There is a considerable and growing unmet medical need in respiratory disease concerning effective anti-inflammatory therapies for conditions such as severe asthma, chronic obstructive pulmonary disease and cystic fibrosis. These diseases share a predominant characteristic of an enhanced and uncontrolled inflammatory response in the lungs, which contributes to disease progression, hospitalization and mortality. These diseases are poorly controlled by current anti-inflammatory therapies including glucocorticoids, which are otherwise effective in many other inflammatory conditions or in milder disease such as asthma. The exact cause of this apparent impairment of glucocorticoid function remains largely unclear; however, recent studies have now implicated a number of possible mechanisms. Central among these is an elevation of the oxidant burden in the lungs and the resulting reduction in the activity of histone deacetylase (HDAC)-2. This contributes to both the enhancement of proinflammatory mediator expression and the impaired ability of the glucocorticoid receptor (GR)-alpha to repress proinflammatory gene expression. The oxidant-mediated reduction in HDAC-2 activity is, in part, a result of an elevation in the phosphoinositol 3-kinase (PI3K) delta/Akt signalling pathway. Blockade of the PI3Kdelta pathway restores glucocortiocoid function in both in vitro and in vivo models, and in primary cells from disease. In addition, inhibition of the PI3Kdelta and PI3Kgamma isoforms is anti-inflammatory in both innate and adaptive immune responses. Consequently, selective inhibition of this pathway may provide a therapeutic strategy both as a novel anti-inflammatory and in combination therapy with glucocorticoids to restore their function. However, a number of other oxidant-related and -unrelated mechanisms, including altered kinase signalling and expression of the dominant negative GRbeta, may also play a role in the development of glucocorticoid insensitivity. Further elucidation of these mechanisms and pathways will enable novel therapeutic targeting for alternative anti-inflammatory drugs or combination therapies providing restoration for the anti-inflammatory action of glucocorticoids.
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Affiliation(s)
- John A Marwick
- MRC Centre for Inflammation Research, Queens Medical Research Institute, University of Edinburgh Medical School, Edinburgh, UK.
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Hunter MJ, Treharne KJ, Winter AK, Cassidy DM, Land S, Mehta A. Expression of wild-type CFTR suppresses NF-kappaB-driven inflammatory signalling. PLoS One 2010; 5:e11598. [PMID: 20644644 PMCID: PMC2904384 DOI: 10.1371/journal.pone.0011598] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Accepted: 05/07/2010] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Mutation of the cystic fibrosis transmembrane-conductance regulator (CFTR) causes cystic fibrosis (CF) but not all CF aspects can easily be explained by deficient ion transport. CF-inflammation provides one example but its pathogenesis remains controversial. Here, we tested the simple but fundamental hypothesis that wild-type CFTR is needed to suppress NF-kappaB activity. METHODOLOGY/PRINCIPAL FINDINGS In lung epithelial (H441) and engineered (H57) cell lines; we report that inflammatory markers are significantly suppressed by wild-type CFTR. Transient-transfection of wild-type CFTR into CFTR-naïve H441 cells, dose-dependently down-regulates both basal and Tumour Necrosis Factor-alpha evoked NF-kappaB activity when compared to transfection with empty vector alone (p<0.01, n>5). This effect was also observed in CFTR-naïve H57-HeLa cells which stably express a reporter of NF-kappaB activity, confirming that the CFTR-mediated repression of inflammation was not due to variable reporter gene transfection efficiency. In contrast, H57 cells transfected with a control cyano-fluorescent protein show a significantly elevated basal level of NF-kappaB activity above control. Initial cell seeding density may be a critical factor in mediating the suppressive effects of CFTR on inflammation as only at a certain density (1x10(5) cells/well) did we observe the reduction in NF-kappaB activity. CFTR channel activity may be necessary for this suppression because the CFTR specific inhibitor CFTR(inh172) significantly stimulates NF-kappaB activity by approximately 30% in CFTR expressing 16HBE14o- cells whereas pharmacological elevation of cyclic-AMP depresses activity by approximately 25% below baseline. CONCLUSIONS/SIGNIFICANCE These data indicate that CFTR has inherent anti-inflammatory properties. We propose that the hyper-inflammation found in CF may arise as a consequence of disrupted repression of NF-kappaB signalling which is normally mediated by CFTR. Our data therefore concur with in vivo and in vitro data from Vij and colleagues which highlights CFTR as a suppressor of basal inflammation acting through NF-kappaB, a central hub in inflammatory signalling.
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Affiliation(s)
- Mairi J. Hunter
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Kate J. Treharne
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Alexandra K. Winter
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Diane M. Cassidy
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Stephen Land
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Anil Mehta
- Division of Medical Sciences, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
- * E-mail:
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Herndon CN, Dassanayake RP, Foreyt WJ, Srikumaran S. Molecular cloning of interleukin-1β, interleukin-8, and tumor necrosis factor-α of bighorn sheep (Ovis canadensis) and comparison with those of other species. Vet Immunol Immunopathol 2010; 138:139-43. [PMID: 20655598 DOI: 10.1016/j.vetimm.2010.06.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2010] [Revised: 06/14/2010] [Accepted: 06/16/2010] [Indexed: 10/19/2022]
Abstract
The susceptibility to, and pathology induced by, Mannheimia haemolytica infection in bighorn sheep (BHS) and domestic sheep (DS) are distinctly different. Bighorn sheep are particularly susceptible to pneumonia caused by M. haemolytica, and the pneumonic lesions in infected BHS are more severe than those in DS. The molecular basis for this disparity has not been elucidated. Proinflammatory cytokines have been implicated in the pathogenesis of multiple lung diseases of humans and animals. It is possible that the enhanced pathology observed in the pneumonic lungs of M. haemolytica-infected BHS, in comparison to that of DS, is due to comparatively higher levels of proinflammatory cytokine expression in BHS. As the first step towards elucidating this concept, we have cloned and sequenced the cDNA encoding the cytokines interleukin-1β (IL-1β), interleukin-8 (IL-8), and tumor necrosis factor-α (TNF-α) of BHS. The cDNA of BHS IL-1β, IL-8, and TNF-α consists of 801, 306, and 705 base pairs encoding 266, 101, and 234 amino acids, respectively. The availability of cDNA encoding IL-1β, IL-8, and TNF-α of BHS should facilitate the elucidation of the role of these cytokines in the differential pathology induced by M. haemolytica infection in BHS and DS.
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Affiliation(s)
- Caroline N Herndon
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040, USA
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Mattoscio D, Evangelista V, De Cristofaro R, Recchiuti A, Pandolfi A, Di Silvestre S, Manarini S, Martelli N, Rocca B, Petrucci G, Angelini DF, Battistini L, Robuffo I, Pensabene T, Pieroni L, Furnari ML, Pardo F, Quattrucci S, Lancellotti S, Davì G, Romano M. Cystic fibrosis transmembrane conductance regulator (CFTR) expression in human platelets: impact on mediators and mechanisms of the inflammatory response. FASEB J 2010; 24:3970-80. [PMID: 20530751 DOI: 10.1096/fj.10-159921] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Inflammatory lung disease is a primary cause of morbidity and mortality in cystic fibrosis (CF). Mechanisms of unresolved acute inflammation in CF are not completely known, although the involvement of cystic fibrosis transmembrane conductance regulator (CFTR) in nonrespiratory cells is emerging. Here we examined CFTR expression and function in human platelets (PLTs) and found that they express a biologically active CFTR. CFTR blockade gave an ∼50% reduction in lipoxin A(4) (LXA(4)) formation during PLT/polymorphonuclear leukocytes (PMN) coincubations by inhibiting the lipoxin synthase activity of PLT 12-lipoxygenase. PLTs from CF patients generated ∼40% less LXA(4) compared to healthy subject PLTs. CFTR inhibition increased PLT-dependent PMN viability (33.0±5.7 vs. 61.2±8.2%; P=0.033), suppressed nitric oxide generation (0.23±0.04 vs. 0.11±0.002 pmol/10(8) PLTs; P=0.004), while reducing AKT (1.02±0.12 vs. 0.71±0.007 U; P=0.04), and increasing p38 MAPK phosphorylation (0.650±0.09 vs. 1.04±0.24 U; P=0.03). Taken together, these findings indicate that PLTs from CF patients are affected by the molecular defect of CFTR. Moreover, this CF PLT abnormality may explain the failure of resolution in CF.
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Affiliation(s)
- Domenico Mattoscio
- Department of Biomedical Sciences, Aging Research Center, CeSI, Gabriele D'Annunzio University Foundation, Via Colle dell'Ara, 66013 Chieti, Italy
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Weiss B, Bujanover Y, Yahav Y, Vilozni D, Fireman E, Efrati O. Probiotic supplementation affects pulmonary exacerbations in patients with cystic fibrosis: a pilot study. Pediatr Pulmonol 2010; 45:536-40. [PMID: 20503277 DOI: 10.1002/ppul.21138] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Probiotics reduce intestinal inflammation in, and Lactobacillus GG (LGG) reduces pulmonary exacerbation rate cystic fibrosis (CF) patients. We intended to determine the effect of a mixed probiotic preparation on pulmonary exacerbations and inflammatory characteristics of the sputum in CF patients. STUDY DESIGN A prospective pilot study of 10 CF patients with mild-moderate lung disease and Pseudomonas aeruginosa colonization, treated with probiotics for 6 months. Pulmonary function tests (PFT's), sputum cultures with semi-quantitative bacterial analysis, and sputum neutrophil count and interleukin-8 (IL-8) levels were compared to pre-treatment and post-treatment values. The rate of pulmonary exacerbations was compared to 2 years prior to the study. RESULTS The exacerbation rate was significantly reduced in comparison to the previous 2 years and to 6 months post-treatment (P = 0.002). PFT's have not changed at the end of treatment and during 6 months post-treatment. No change in sputum bacteria, neutrophil count, and IL-8 levels was observed. CONCLUSION Probiotics reduce pulmonary exacerbations rate in patients with CF. Probiotics may have a preventive potential for pulmonary deterioration in CF patients.
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Affiliation(s)
- Batia Weiss
- Division of Pediatric Gastroenterology and Nutrition, Safra Children's Hospital, Tel-Hashomer, Israel.
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Chapman AL, Morrissey BM, Vasu VT, Juarez MM, Houghton JS, Li CS, Cross CE, Eiserich JP. Myeloperoxidase-dependent oxidative metabolism of nitric oxide in the cystic fibrosis airway. J Cyst Fibros 2010; 9:84-92. [PMID: 20080069 PMCID: PMC3118565 DOI: 10.1016/j.jcf.2009.10.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 08/05/2009] [Accepted: 10/01/2009] [Indexed: 10/19/2022]
Abstract
BACKGROUND Decreased expired nitric oxide (eNO) is commonly observed in cystic fibrosis (CF) patients and is usually explained by dysregulation of NO synthase (NOS) isoforms in respiratory tract epithelium. Later stages of this disease are accompanied by intense airway infiltration of phagocytes with high NOS activity, abundant levels of the hemoprotein myeloperoxidase (MPO) and significant production of significant reactive oxygen species. METHODS This study characterizes the contribution of the high airway levels of MPO to decreased eNO levels in adult CF patients. NO metabolites (NO(x)) and MPO levels in fresh sputum of control and adult CF patients were determined and related to measurements of eNO and to in vitro consumption of NO in CF sputum. RESULTS Despite essentially equal levels of NO(x) in sputum, eNO was 2- to 3-fold lower in CF patients compared to healthy controls. In CF patients, eNO levels were negatively associated with sputum peroxidase activity. In vivo correlations were confirmed by ex vivo studies of NO consumption by MPO in CF sputum. Immunodepletion studies confirmed MPO as the major heme peroxidase in CF sputum contributing to the hydrogen peroxide (H(2)O(2))-dependent consumption of NO. CONCLUSIONS In CF airways MPO acts as a phagocyte-derived NO oxidase that diminishes NO bioavailability at airway surfaces, possibly identifying this peroxidase as a potential target for therapeutic intervention.
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Affiliation(s)
- Anna L.P. Chapman
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
| | - Brian M. Morrissey
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
| | - Vihas T. Vasu
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
| | - Maya M. Juarez
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
| | - Jessica S. Houghton
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
| | - Chin-Shang Li
- Department of Public Health Sciences, Division of Biostatistics, School of Medicine, University of California, Davis, California 95616 USA
| | - Carroll E. Cross
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
- Department of Physiology and Membrane Biology, University of California, Davis, California 95616 USA
| | - Jason P. Eiserich
- Department of Internal Medicine, Division of Pulmonary/Critical Care Medicine, University of California, Davis, California 95616 USA
- Department of Physiology and Membrane Biology, University of California, Davis, California 95616 USA
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Marwick JA, Chung KF, Adcock IM. Phosphatidylinositol 3-kinase isoforms as targets in respiratory disease. Ther Adv Respir Dis 2010; 4:19-34. [PMID: 20051446 DOI: 10.1177/1753465809352792] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Respiratory diseases such as chronic obstructive pulmonary disease [COPD], severe asthma, cystic fibrosis [CF] and idiopathic pulmonary fibrosis [IPF] are inadequately controlled by current therapies. The underlying molecular mechanisms and pathogenesis of these diseases remain unclear, making identification and validation of potential new therapeutic targets difficult. However, recent studies have identified the central signalling mediator PI3K as playing an integral role in the immune system including initiation and maintenance of inflammatory responses. Specifically, the relatively leukocyte-specific PI3Kgamma and PI3Kdelta isoforms are central to leukocyte function and can be targeted pharmacologically. Early to man studies using selective PI3K isoform inhibitors are required to determine whether they have a future in treating respiratory disease, particularly in controlling both innate and adaptive inflammatory responses as well as restoring glucocorticoid function and reducing tumorigenesis.
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Affiliation(s)
- John A Marwick
- Section of Airways Disease, National Heart and Lung Institute, Imperial College London, London, UK.
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Copreni E, Nicolis E, Tamanini A, Bezzerri V, Castellani S, Palmieri L, Giri MG, Vella A, Colombatti M, Rizzotti P, Conese M, Cabrini G. Late generation lentiviral vectors: Evaluation of inflammatory potential in human airway epithelial cells. Virus Res 2009; 144:8-17. [DOI: 10.1016/j.virusres.2009.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2008] [Revised: 03/10/2009] [Accepted: 03/22/2009] [Indexed: 10/20/2022]
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Al Alam D, Deslee G, Tournois C, Lamkhioued B, Lebargy F, Merten M, Belaaouaj A, Guenounou M, Gangloff SC. Impaired interleukin-8 chemokine secretion by staphylococcus aureus-activated epithelium and T-cell chemotaxis in cystic fibrosis. Am J Respir Cell Mol Biol 2009; 42:644-50. [PMID: 19597126 DOI: 10.1165/rcmb.2008-0021oc] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Staphylococcus aureus is frequently isolated from lungs of patients with cystic fibrosis (CF). Upon lung infection with S. aureus, airway epithelial cells (AEC) produce high levels of chemokines that enhance T-cell chemotaxis. Although the number of lymphocytes is increased in the airways and bronchoalveolar lavage fluid of patients with CF, the mechanisms responsible for their accumulation and the role of S. aureus in this process are largely unknown. This study investigated early S. aureus impact on chemokine secretion by CF epithelial cells and chemotaxis of CF T cells. CF and non-CF AEC were grown in a cell culture model and apically stimulated with S. aureus. Supernatants were quantified for chemokine secretions and assayed for T-cell chemotaxis. CF AEC secreted constitutively larger amounts of IL-8, GROalpha, MIG, MIP-3beta, and MCP-1 than non-CF epithelial cells. S. aureus interaction with epithelial cells increased chemokine production by non-CF cells but had no effect on CF cells. Chemotaxis of T cells derived from patients with CF was greater than that of T cells from subjects without CF. Moreover, there were more CF T cells expressing CXCR1 as compared with non-CF T cells. Under our experimental conditions, inhibition of IL-8 or its receptor CXCR1 resulted in a considerable decrease in T-cell chemotaxis (up to 80%). These data suggest that IL-8 and its receptor CXCR1 are key players in the chemotaxis of CF T cells and could be used as targets to develop therapies for CF.
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Affiliation(s)
- Denise Al Alam
- Laboratoire d'Immunologie et de Microbiologie EA3796, IFR53, UFR de Pharmacie 1 avenue du Maréchal Juin 51100 Reims, France
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John G, Yildirim AO, Rubin BK, Gruenert DC, Henke MO. TLR-4-mediated innate immunity is reduced in cystic fibrosis airway cells. Am J Respir Cell Mol Biol 2009; 42:424-31. [PMID: 19502387 DOI: 10.1165/rcmb.2008-0408oc] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Airway epithelial cells contribute to the inflammatory response of the lung, and their innate immune response is primarily mediated via Toll-like receptor (TLR) signaling. Cystic fibrosis (CF) airways are chronically infected with Pseudomonas aeruginosa, suggesting a modified immune response in CF. We investigated the TLR-4 expression and the inflammatory profile (IL-8 and IL-6 secretion) in CF bronchial epithelial cell line CFBE41o- and its CF transmembrane ion condcutance regulator (CFTR)-corrected counterpart grown under air-liquid interface conditions after stimulation with lipopolysaccharide (LPS) from gram-negative bacteria. In CFTR-corrected cells, IL-8 and IL-6 secretions were constitutively activated but significantly increased after LPS stimulation compared with CFBE41o-. Blocking TLR-4 by a specific antibody significantly inhibited IL-8 secretion only in CFTR-corrected cells. Transfection with specific siRNA directed against TLR-4 mRNA significantly reduced the response to LPS in both cell lines. Fluorescence-activated cell sorter analysis revealed significantly higher levels of TLR-4 surface expression in CFTR-corrected cells. In histologic lung sections of patients with CF, the TLR-4 expression in the bronchial epithelium was significantly reduced compared with healthy control subjects. In CF the loss of CFTR function appears to decrease innate immune responses, possibly by altering the expression of TLR-4 on airway epithelial cells. This may contribute to chronic bacterial infection of CF airways.
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Affiliation(s)
- Gerrit John
- Philipps-University Marburg, Department of Pulmonary Medicine, Baldingerstrasse 1, 35043 Marburg, Germany
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Abstract
Cystic fibrosis is the most common lethal genetic disease in white populations. The outlook for patients with the disease has improved steadily over many years, largely as a result of earlier diagnosis, more aggressive therapy, and provision of care in specialised centres. Researchers now have a more complete understanding of the molecular-biological defect that underlies cystic fibrosis, which is leading to new approaches to treatment. One of these treatments, hypertonic saline, is already in use, whereas others are in advanced stages of development. We review clinical care for cystic fibrosis and discuss recent advances in the understanding of its pathogenesis, implementation of screening of neonates, and development of therapies aimed at treating the basic defect.
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Affiliation(s)
- Brian P O'Sullivan
- Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA 01655, USA.
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Gavilanes X, Huaux F, Meyer M, Lebecque P, Marbaix E, Lison D, Scholte B, Wallemacq P, Leal T. Azithromycin fails to reduce increased expression of neutrophil-related cytokines in primary-cultured epithelial cells from cystic fibrosis mice. J Cyst Fibros 2009; 8:203-10. [DOI: 10.1016/j.jcf.2009.03.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Revised: 02/11/2009] [Accepted: 03/03/2009] [Indexed: 02/08/2023]
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Zhang T, Song KW, Hekmat-Nejad M, Morris DG, Wong BR. A modeling-derived hypothesis on chronicity in respiratory diseases: desensitized pathogen recognition secondary to hyperactive IRAK/TRAF6 signaling. PLoS One 2009; 4:e5332. [PMID: 19390631 PMCID: PMC2669711 DOI: 10.1371/journal.pone.0005332] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2008] [Accepted: 03/30/2009] [Indexed: 11/18/2022] Open
Abstract
Several chronic respiratory diseases exhibit hyperactive immune responses in the lung: abundant inflammatory mediators; infiltrating neutrophils, macrophages, lymphocytes and other immune cells; and increased level of proteases. Such diseases include cystic fibrosis (CF), chronic obstructive pulmonary disease (COPD) and severe/neutrophilic asthma. Paradoxically, patients with these diseases are also susceptible to detrimental bacterial infection and colonization. In this paper, we seek to explain how a positive feedback mechanism via IL-8 could lead to desensitization of epithelial cells to pathogen recognition thus perpetuating bacterial colonization and chronic disease states in the lung. Such insight was obtained from mathematical modeling of the IRAK/TRAF6 signaling module, and is consistent with existing clinical evidence. The potential implications for targeted treatment regimes for these persistent respiratory diseases are explored.
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Affiliation(s)
- Tingting Zhang
- Roche Palo Alto LLC, Palo Alto, California, United States of America.
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Meyer M, Huaux F, Gavilanes X, van den Brûle S, Lebecque P, Lo Re S, Lison D, Scholte B, Wallemacq P, Leal T. Azithromycin reduces exaggerated cytokine production by M1 alveolar macrophages in cystic fibrosis. Am J Respir Cell Mol Biol 2009; 41:590-602. [PMID: 19244203 DOI: 10.1165/rcmb.2008-0155oc] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Macrophages phagocyte pathogenic microorganisms and orchestrate immune responses by producing a variety of inflammatory mediators. The cystic fibrosis (CF) transmembrane conductance regulator chloride channel has been reported to be of pivotal importance for macrophage functions. The exact phenotype and role of macrophages in CF is still unknown. Alveolar and peritoneal macrophages were monitored in CF mice homozygous for the F508 del mutation and in wild-type control animals. Classical (M1) and alternative (M2) macrophage polarization and responses to LPS from Pseudomonas aeruginosa were investigated, and the effect of azithromycin was examined in both cell populations. We show that alveolar macrophage counts were 1.7-fold higher in CF as compared with wild-type mice. The macrophage-related chemokine, chemokine C-C motif ligand (CCL)-2, was found to be at least 10-fold more abundant in the alveolar space of mutant mice. Cell count and CCL-2 protein levels were also increased in the peritoneal cavity of CF mice. Both M1 and M2 macrophage polarization were significantly enhanced in alveolar and peritoneal cells from F508del-CF mice as compared with control animals. LPS-stimulated expression of proinflammatory mediators, such as nitric oxide synthase-2, IL-1beta, and CCL-2, was increased, whereas anti-inflammatory IL-10 expression was decreased in CF macrophages. Azithromycin, added to cell cultures at 1 mg/liter, significantly reduced proinflammatory cytokine expression (IL-1beta, CCL-2, TNF-alpha) in M1-induced CF and wild-type alveolar macrophages. Our findings indicate that CF macrophages are ubiquitously accumulated, and that these cells are polarized toward classical and alternative activation status. Azithromycin down-regulates inflammatory cytokine production by M1-polarized CF alveolar macrophages.
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Affiliation(s)
- Magali Meyer
- Department of Clinical Chemistry, Université Catholique de Louvain, Brussels, Belgium
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Talebian L, Coutermarsh B, Channon JY, Stanton BA. Corr4A and VRT325 do not reduce the inflammatory response to P. aeruginosa in human cystic fibrosis airway epithelial cells. Cell Physiol Biochem 2009; 23:199-204. [PMID: 19255514 DOI: 10.1159/000204108] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2009] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND P. aeruginosa chronically colonizes the lung in CF patients and elicits a proinflammatory response. Excessive secretion of IL-6 and IL-8 by CF airway cells in response to P. aeruginosa infection in the CF airway is though to contribute to lung injury. Accordingly, the goal of this study was to test the hypothesis that Corr4a and VRT325, investigational compounds that increase DeltaF508-CFTR mediated Cl(-) secretion in human CF airway cells, reduce the pro-inflammatory response to P. aeruginosa. METHODS IL-6 and IL-8 secretion by polarized CF human airway epithelial cells (CFBE41o-) were measured by multiplex analysis, and DeltaF508-CFTR Cl- secretion was measured in Ussing chambers. Airway cells were exposed to P. aeruginosa (PAO1 or PA14) and Corr4a or VRT325. RESULTS Corr4a and VRT325 increased DeltaF508-CFTR Cl(-) secretion but did not reduce either constitutive IL-6 or IL-8 secretion, or IL-6 and IL-8 secretion stimulated by P. aeruginosa (PA14 or PAO1). CONCLUSIONS Corr4a and VRT325 do not reduce the inflammatory response to P. aeruginosa in human cystic fibrosis airway epithelial cells.
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Affiliation(s)
- Laleh Talebian
- Department of Physiology, Dartmouth Medical School, Hanover, Germany.
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