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Smith D, Du Rand I, Addy CL, Collyns T, Hart SP, Mitchelmore PJ, Rahman NM, Saggu R. British Thoracic Society guideline for the use of long-term macrolides in adults with respiratory disease. Thorax 2020; 75:370-404. [PMID: 32303621 DOI: 10.1136/thoraxjnl-2019-213929] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- David Smith
- North Bristol Lung Centre, Southmead Hospital, Bristol, UK
| | | | - Charlotte Louise Addy
- Centre for Medical Education, Queens University Belfast, Regional Respiratory Centre, Belfast City Hospital, Belfast, UK
| | - Timothy Collyns
- Medical Microbiology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Simon Paul Hart
- Cardiovascular and Respiratory Studies, Hull York Medical School/University of Hull, Hull, UK
| | - Philip J Mitchelmore
- Institute of Biomedical and Clinical Science, College of Medicine & Health, University of Exeter, Exeter, UK.,Department of Respiratory Medicine, Royal Devon and Exeter Hospital, Exeter, UK
| | - Najib M Rahman
- Oxford Respiratory Trials Unit and Oxford NIHR Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Ravijyot Saggu
- Pharmacy, University College London Hospitals NHS Foundation Trust, London, UK
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2
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Gibson PG, Yang IA, Upham JW, Reynolds PN, Hodge S, James AL, Jenkins C, Peters MJ, Marks GB, Baraket M, Powell H, Simpson JL. Efficacy of azithromycin in severe asthma from the AMAZES randomised trial. ERJ Open Res 2019; 5:00056-2019. [PMID: 31886156 PMCID: PMC6926362 DOI: 10.1183/23120541.00056-2019] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/09/2019] [Indexed: 12/12/2022] Open
Abstract
Background Low-dose azithromycin is an effective therapy for persistent asthma; however, its benefit in severe asthma is not defined. Methods Participants with severe asthma were identified from the AMAZES randomised, placebo-controlled trial of long-term (48 weeks) low-dose azithromycin. Participants who met one of the following severe asthma definitions were included: 1) Global Initiative for Asthma step 4 treatment with poor asthma control (asthma control questionnaire score ≥0.75); 2) International Severe Asthma Registry definition; 3) American Thoracic Society and European Respiratory Society severe asthma definitions. The rate of total exacerbations was calculated for each subgroup and efficacy of azithromycin compared with placebo. Asthma-related quality of life was assessed before and after treatment along with adverse effects. Results Azithromycin significantly reduced asthma exacerbations in each group. In patients meeting the American Thoracic Society and European Respiratory Society task force definition of severe asthma (n=211), the rate of exacerbations with treatment was 1.2 per person-year, which was significantly less than for placebo (2.01 per person-year), giving an incidence rate ratio (95% CI) of 0.63 (0.41, 0.96). The proportion of participants experiencing at least one asthma exacerbation was reduced by azithromycin from 64% to 49% (p=0.021). A similar beneficial treatment effect was seen in participants poorly controlled with Global Initiative for Asthma step 4 treatment and those with International Severe Asthma Registry-defined severe asthma. Azithromycin also significantly improved the quality of life in severe asthma (p<0.05). Treatment was well tolerated, with gastrointestinal symptoms being the main adverse effect. Conclusion Long-term, low-dose azithromycin reduced asthma exacerbations and improved the quality of life in patients with severe asthma, regardless of how this was defined. These data support the addition of azithromycin as a treatment option for patients with severe asthma. Low-dose azithromycin is effective therapy for persistent asthma. AMAZES supports AZM as a treatment option for patients with severe asthma. Long-term, low-dose AZM reduces asthma exacerbations and improves quality of life in patients with severe asthma.http://bit.ly/2LWyjYz
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Affiliation(s)
- Peter G Gibson
- Dept of Respiratory and Sleep Medicine, Hunter Medical Research Institute, Newcastle, Australia.,Priority Research Centre for Healthy Lungs, The University of Newcastle, Newcastle, Australia.,Woolcock Institute of Medical Research, Glebe, Australia
| | - Ian A Yang
- Faculty of Medicine, The University of Queensland, St Lucia, Australia.,Dept of Thoracic Medicine, The Prince Charles Hospital, Chermside, Australia
| | - John W Upham
- Faculty of Medicine, The University of Queensland, St Lucia, Australia.,Dept of Respiratory Medicine, Princess Alexandra Hospital, Woolloongabba, Australia
| | - Paul N Reynolds
- Dept of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, Australia.,Dept of Medicine, The University of Adelaide, Adelaide, Australia
| | - Sandra Hodge
- Dept of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, Australia.,Dept of Medicine, The University of Adelaide, Adelaide, Australia
| | - Alan L James
- Dept of Pulmonary Physiology and Sleep Medicine, Sir Charles Gairdner Hospital, Nedlands, Australia.,School of Medicine and Pharmacology, The University of Western Australia, Perth, Australia
| | - Christine Jenkins
- Respiratory Trials, The George Institute for Global Health, Sydney, Australia.,Faculty of Medicine and Health Sciences, Macquarie University, North Ryde, Australia
| | - Matthew J Peters
- Faculty of Medicine and Health Sciences, Macquarie University, North Ryde, Australia.,Dept of Thoracic Medicine, Concord General Hospital, Concord, Australia
| | - Guy B Marks
- Woolcock Institute of Medical Research, Glebe, Australia.,South Western Sydney Clinical School, UNSW, Sydney, Australia
| | - Melissa Baraket
- Respiratory Medicine Dept and Ingham Institute Liverpool Hospital, University of New South Wales Medicine Faculty, Sydney, Australia
| | - Heather Powell
- Dept of Respiratory and Sleep Medicine, Hunter Medical Research Institute, Newcastle, Australia.,Priority Research Centre for Healthy Lungs, The University of Newcastle, Newcastle, Australia
| | - Jodie L Simpson
- Priority Research Centre for Healthy Lungs, The University of Newcastle, Newcastle, Australia
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3
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Tian B, Xuan N, Wang Y, Zhang G, Cui W. The efficacy and safety of azithromycin in asthma: A systematic review. J Cell Mol Med 2019; 23:1638-1646. [PMID: 30661297 PMCID: PMC6378181 DOI: 10.1111/jcmm.13919] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 07/30/2018] [Accepted: 08/26/2018] [Indexed: 02/05/2023] Open
Abstract
Azithromycin is a potential therapeutic choice for asthma control, which is a heterogeneous airway inflammatory disease. Because of variable findings, we intend to evaluate the therapeutic effect and safety of azithromycin in asthma. Databases, including PubMed, EMBASE, Cochrane, and CNKI until 31 December 2017, were searched to identify available randomised controlled trials regarding azithromycin treatment for asthma. We identified seven studies involving 1520 cases that met our criteria. The mean difference for lung function (FEV1 , FVC, PEF), symptom assessment (ACQ, AQLQ), airway inflammation, and risk ratios for adverse events were extracted. Chi-square and I2 tests were applied to evaluate the heterogeneity among the studies towards each index with a random effect model or a fixed effect model. Pooled analysis shows that azithromycin administration results in no significant improvement in FEV1 (MD: 0.09, 95% CI -0.10 to 0.29, P = 0.36), PEF (MD: 11.76; 95% CI, -2.86 to 26.38, P = 0.11), total airway inflammatory cells (MD: -0.29; 95% CI, -1.38 to 0.80, P = 0.60), ACQ (MD: 0.05; 95% CI, -0.08 to 0.19, P = 0.44), and AQLQ (MD: 0.12; 95% CI, -0.02 to 0.26, P = 0.10). Moreover, no significant difference was detected in adverse events (Risk ratio 0.99; 95% CI, 0.82-1.19, P = 0.90). These findings demonstrate no beneficial clinical outcome of azithromycin in asthma control, and we propose that further prospective cohorts are warranted.
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Affiliation(s)
- Bao‐Ping Tian
- Department of Critical Care MedicineThe Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
| | - Nanxia Xuan
- Department of Critical Care MedicineThe Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
| | - Yesong Wang
- Department of Critical Care MedicineThe Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
| | - Gensheng Zhang
- Department of Critical Care MedicineThe Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
| | - Wei Cui
- Department of Critical Care MedicineThe Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiangChina
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Abstract
Bronchiectasis is a chronic lung disease with permanently damaged airways predisposing to recurrent respiratory tract infections. There is an increasing prevalence of bronchiectasis in the elderly, affecting approximately 10 patients per 1,000 population. Studies have shown that older, frailer patients tend to have a more severe and symptomatic disease, with those aged 80 and above with worse quality of life, increased hospitalization and increased mortality. These patients will be encountered by clinicians working in all aspects of elderly care. This review covers the various investigations and aspects of treatment for bronchiectasis and how they may be utilized in a more older and generally frailer population.
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Affiliation(s)
- Tom M Quinn
- Respiratory Department, Royal Infirmary of Edinburgh, Edinburgh, UK, ;
| | - Adam T Hill
- Respiratory Department, Royal Infirmary of Edinburgh, Edinburgh, UK, ;
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5
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Lopes Dos Santos Santiago G, Brusselle G, Dauwe K, Deschaght P, Verhofstede C, Vaneechoutte D, Deschepper E, Jordens P, Joos G, Vaneechoutte M. Influence of chronic azithromycin treatment on the composition of the oropharyngeal microbial community in patients with severe asthma. BMC Microbiol 2017; 17:109. [PMID: 28486933 PMCID: PMC5424369 DOI: 10.1186/s12866-017-1022-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Accepted: 05/03/2017] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND This study of the oropharyngeal microbiome complements the previously published AZIthromycin in Severe ASThma (AZISAST) clinical trial, where the use of azithromycin was assessed in subjects with exacerbation-prone severe asthma. Here, we determined the composition of the oropharyngeal microbial community by means of deep sequencing of the amplified 16S rRNA gene in oropharyngeal swabs from patients with exacerbation-prone severe asthma, at baseline and during and after 6 months treatment with azithromycin or placebo. RESULTS A total of 1429 OTUs were observed, of which only 59 were represented by more than 0.02% of the reads. Firmicutes, Bacteroidetes, Fusobacteria, Proteobacteria and Actinobacteria were the most abundant phyla and Streptococcus and Prevotella were the most abundant genera in all the samples. Thirteen species only accounted for two thirds of the reads and two species only, i.e. Prevotella melaninogenica and Streptococcus mitis/pneumoniae, accounted for one fourth of the reads. We found that the overall composition of the oropharyngeal microbiome in patients with severe asthma is comparable to that of the healthy population, confirming the results of previous studies. Long term treatment (6 months) with azithromycin increased the species Streptococcus salivarius approximately 5-fold and decreased the species Leptotrichia wadei approximately 5-fold. This was confirmed by Boruta feature selection, which also indicated a significant decrease of L. buccalis/L. hofstadtii and of Fusobacterium nucleatum. Four of the 8 treated patients regained their initial microbial composition within one month after cessation of treatment. CONCLUSIONS Despite large diversity of the oropharyngeal microbiome, only a few species predominate. We confirm the absence of significant differences between the oropharyngeal microbiomes of people with and without severe asthma. Possibly, long term azithromycin treatment may have long term effects on the composition of the oropharygeal microbiome in half of the patients.
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Affiliation(s)
- Guido Lopes Dos Santos Santiago
- Laboratory Bacteriology Research, Department Clinical Chemistry, Microbiology & Immunology, Faculty of Medicine & Health Sciences, University of Ghent, Ghent, Belgium
| | - Guy Brusselle
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Kenny Dauwe
- AIDS Reference Laboratory, Ghent University, Ghent, Belgium
| | - Pieter Deschaght
- Laboratory Bacteriology Research, Department Clinical Chemistry, Microbiology & Immunology, Faculty of Medicine & Health Sciences, University of Ghent, Ghent, Belgium
| | | | - Dries Vaneechoutte
- Department of Plant Systems Biology (VIB), Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
| | - Ellen Deschepper
- Biostatistics Unit, Department of Public Health, Ghent University Hospital, Ghent, Belgium
| | - Paul Jordens
- Department of Respiratory Medicine, OLV Ziekenhuis Aalst, Aalst, Belgium
| | - Guy Joos
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Mario Vaneechoutte
- Laboratory Bacteriology Research, Department Clinical Chemistry, Microbiology & Immunology, Faculty of Medicine & Health Sciences, University of Ghent, Ghent, Belgium.
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Fjaellegaard K, Sin MD, Browatzki A, Ulrik CS. Antibiotic therapy for stable non-CF bronchiectasis in adults - A systematic review. Chron Respir Dis 2016; 14:174-186. [PMID: 27507832 DOI: 10.1177/1479972316661923] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
To provide an update on efficacy and safety of antibiotic treatments for stable non-cystic fibrosis (CF) bronchiectasis (BE). Systematic review based on the Preferred Reporting Items for Systematic reviews and Meta-Analyses guidelines was done. Twenty-six studies (1.898 patients) fulfilled the inclusion criteria. Studies of inhaled tobramycin have revealed conflicting results regarding quality of life (QoL), exacerbations and admissions, but may result in sputum cultures negative for Pseudomonas aeruginosa, whereas studies investigating the effect of inhaled gentamycin have shown positive effects on sputum bacterial density, decrease in sputum cultures positive for P. aeruginosa, QoL and exacerbation rate, but no improvement in forced expiratory volume in first second (FEV1). Oral azithromycin can reduce exacerbations, together with minor improvements in QoL and FEV1. Furthermore, oral erythromycin reduces exacerbations, but has no effect on lung function, symptoms or QoL. Inhaled ciprofloxacin may reduce P. aeruginosa in sputum cultures, but without changes in lung function, exacerbations or QoL. Although with limited evidence, inhaled colistin may have effects on P. aeruginosa density, exacerbations and QoL, whereas studies on aztreonam revealed no significant clinical improvements in the outcomes of interest, including exacerbation rate. Adverse events, including bronchospasm, have been reported in association with tobramycin and aztreonam. Several antibiotic treatment regimens have been shown to improve QoL and exacerbation rate, whereas findings regarding sputum production, lung function and admissions have been conflicting. Evidence-based treatment algorithms for antibiotic treatment of stable non-CF BE will have to await large-scale, long-term controlled studies.
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Affiliation(s)
| | - Melda Dönmez Sin
- 1 Department of Pulmonary Medicine, Hvidovre Hospital, Hvidovre, Denmark
| | - Andrea Browatzki
- 2 Department of Infectious Disease and Pulmonary Medicine, Nordsjællands Hospital, Hillerod, Denmark
| | - Charlotte Suppli Ulrik
- 1 Department of Pulmonary Medicine, Hvidovre Hospital, Hvidovre, Denmark.,3 University of Copenhagen, København, Denmark
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Vermeersch K, Gabrovska M, Deslypere G, Demedts IK, Slabbynck H, Aumann J, Ninane V, Verleden GM, Troosters T, Bogaerts K, Brusselle GG, Janssens W. The Belgian trial with azithromycin for acute COPD exacerbations requiring hospitalization: an investigator-initiated study protocol for a multicenter, randomized, double-blind, placebo-controlled trial. Int J Chron Obstruct Pulmon Dis 2016; 11:687-96. [PMID: 27099485 PMCID: PMC4820219 DOI: 10.2147/copd.s95501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Long-term use of macrolide antibiotics is effective to prevent exacerbations in chronic obstructive pulmonary disease (COPD). As risks and side effects of long-term intervention outweigh the benefits in the general COPD population, the optimal dose, duration of treatment, and target population are yet to be defined. Hospitalization for an acute exacerbation (AE) of COPD may offer a targeted risk group and an obvious risk period for studying macrolide interventions. Methods/design Patients with COPD, hospitalized for an AE, who have a smoking history of ≥10 pack-years and had ≥1 exacerbation in the previous year will be enrolled in a multicenter, randomized, double-blind, placebo-controlled trial (NCT02135354). On top of a standardized treatment of systemic corticosteroids and antibiotics, subjects will be randomized to receive either azithromycin or placebo during 3 months, at an uploading dose of 500 mg once a day for 3 days, followed by a maintenance dose of 250 mg once every 2 days. The primary endpoint is the time-to-treatment failure during the treatment phase (ie, from the moment of randomization until the end of intervention). Treatment failure is a novel composite endpoint defined as either death, the admission to intensive care or the requirement of additional systemic steroids or new antibiotics for respiratory reasons, or the diagnosis of a new AE after discharge. Discussion We investigate whether azithromycin initiated at the onset of a severe exacerbation, with a limited duration and at a low dose, might be effective and safe in the highest risk period during and immediately after the acute event. If proven effective and safe, this targeted approach may improve the treatment of severe AEs and redirect the preventive use of azithromycin in COPD to a temporary intervention in the subgroup with the highest unmet needs.
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Affiliation(s)
- Kristina Vermeersch
- KU Leuven, Laboratory of Respiratory Diseases, Department of Clinical and Experimental Medicine, Faculty of Medicine, Leuven, Belgium
| | - Maria Gabrovska
- Department of Pneumology, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - Griet Deslypere
- Department of Pneumology, Jessa Ziekenhuis, Hasselt, Belgium
| | - Ingel K Demedts
- Department of Respiratory Medicine, AZ Delta Roeselare-Menen, Roeselare, Belgium
| | - Hans Slabbynck
- Department of Respiratory Medicine, ZNA Middelheim, Antwerpen, Belgium
| | - Joseph Aumann
- Department of Pneumology, Jessa Ziekenhuis, Hasselt, Belgium
| | - Vincent Ninane
- Department of Pneumology, Centre Hospitalier Universitaire Saint-Pierre, Brussels, Belgium
| | - Geert M Verleden
- KU Leuven, Laboratory of Respiratory Diseases, Department of Clinical and Experimental Medicine, Faculty of Medicine, Leuven, Belgium
| | - Thierry Troosters
- KU Leuven, Laboratory of Respiratory Diseases, Department of Clinical and Experimental Medicine, Faculty of Medicine, Leuven, Belgium; KU Leuven, Department of Rehabilitation Sciences, Faculty of Kinesiology and Rehabilitation Sciences, Leuven, Belgium
| | - Kris Bogaerts
- KU Leuven, Department of Public Health and Primary Care, I-BioStat, Leuven, Belgium; Hasselt University, Hasselt, Belgium
| | - Guy G Brusselle
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
| | - Wim Janssens
- KU Leuven, Laboratory of Respiratory Diseases, Department of Clinical and Experimental Medicine, Faculty of Medicine, Leuven, Belgium
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Haworth CS, Bilton D, Elborn JS. Long-term macrolide maintenance therapy in non-CF bronchiectasis: evidence and questions. Respir Med 2014; 108:1397-408. [PMID: 25301290 DOI: 10.1016/j.rmed.2014.09.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 08/19/2014] [Accepted: 09/07/2014] [Indexed: 12/14/2022]
Abstract
Macrolide antibiotics have anti-inflammatory and immunomodulatory properties in addition to antibacterial activity. Until recently, only a small number of studies evaluating macrolides in patients with non-cystic fibrosis (CF) bronchiectasis had been published. These were open-label, uncontrolled, short-duration studies that included small numbers of patients. However, these studies suggested that macrolides can reduce exacerbation frequency, reduce sputum volume, and improve lung function in patients with non-CF bronchiectasis. Three recently published randomised, double-blind, placebo-controlled studies showed that macrolides (azithromycin or erythromycin) taken for between 6 and 12 months led to significant reductions in exacerbation rate and reduced the decline in lung function. In all studies, macrolides were generally well tolerated. The advantages of macrolide maintenance therapy need to be balanced against the risks, which include emergence of bacterial resistance, cardiotoxicity and ototoxicity. In addition, a key need is the consistent definition of endpoints for studies in non-CF bronchiectasis, particularly the definition of exacerbation, to allow systematic data analysis. Existing studies on the use of low-dose macrolides in non-CF bronchiectasis are encouraging, but further studies are needed to define the optimal agent, dose, duration for treatment, and the patients likely to benefit and long-term safety.
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Affiliation(s)
- Charles S Haworth
- Cambridge Centre for Lung Infection, Papworth Hospital, Cambridge, CB23 3RE, UK.
| | - Diana Bilton
- Department of Respiratory Medicine, Royal Brompton Hospital, Sydney Street, London, SW3 6NP, UK
| | - J Stuart Elborn
- Centre for Infection and Immunity, Queen's University of Belfast, 97 Lisburn Road, Belfast, BT9 7BC, Northern Ireland, UK
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Abstract
PURPOSE OF REVIEW Severe asthma is a heterogeneous syndrome, encompassing several distinct clinical phenotypes. Different molecular and cellular pathways or endotypes determine the type of underlying airway inflammation in patients with severe asthma, which can be categorized as eosinophilic asthma (allergic and nonallergic) or noneosinophilic asthma (neutrophilic and paucigranulocytic). In this review, we discuss the potential role of macrolides in the treatment of severe asthma in adults. RECENT FINDINGS Maintenance treatment with low-dose macrolides such as erythromycin and azithromycin provides clinical benefit in several chronic neutrophilic airway diseases, including cystic fibrosis (CF), non-CF bronchiectasis and exacerbation-prone chronic obstructive pulmonary disease. Although several short-term studies of macrolides in mild-to-moderate asthma have failed to improve lung function, the AzIthromycin in Severe Asthma trial has demonstrated a significant reduction in the rate of exacerbations in patients with exacerbation-prone noneosinophilic severe asthma. As chronic macrolide use is associated with the risks of population antimicrobial resistance, this add-on treatment should be restricted to severe asthma patients at greatest unmet need despite optimal asthma management. SUMMARY Further clinical, translational and basic research is needed to better phenotype patients with severe asthma, to determine the risk-benefit ratio of macrolide maintenance treatment in neutrophilic severe asthma and to elucidate the principal mechanisms of action of macrolides.
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11
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IL-17A in human respiratory diseases: innate or adaptive immunity? Clinical implications. Clin Dev Immunol 2013; 2013:840315. [PMID: 23401702 PMCID: PMC3562607 DOI: 10.1155/2013/840315] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 12/26/2012] [Indexed: 01/28/2023]
Abstract
Since the discovery of IL-17 in 1995 as a T-cell cytokine, inducing IL-6 and IL-8 production by fibroblasts, and the report of a separate T-cell lineage producing IL-17(A), called Th17 cells, in 2005, the role of IL-17 has been studied in several inflammatory diseases. By inducing IL-8 production and subsequent neutrophil attraction towards the site of inflammation, IL-17A can link adaptive and innate immune responses. More specifically, its role in respiratory diseases has intensively been investigated. We here review its role in human respiratory diseases and try to unravel the question whether IL-17A only provides a link between the adaptive and innate respiratory immunity or whether this cytokine might also be locally produced by innate immune cells. We furthermore briefly discuss the possibility to reduce local IL-17A production as a treatment option for respiratory diseases.
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12
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Cameron EJ, McSharry C, Chaudhuri R, Farrow S, Thomson NC. Long-term macrolide treatment of chronic inflammatory airway diseases: risks, benefits and future developments. Clin Exp Allergy 2013; 42:1302-12. [PMID: 22925316 DOI: 10.1111/j.1365-2222.2012.03979.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Macrolide antibiotics were discovered over 50 years ago and following their use as antimicrobials it became apparent that this group of antibiotics also possessed anti-inflammatory properties. Subsequent clinical trials showed benefits of macrolides as long-term adjuncts in the treatment of a spectrum of chronic inflammatory respiratory diseases, particularly diffuse panbronchiolitis, cystic fibrosis, post-transplant bronchiolitis obliterans and more recently chronic obstructive pulmonary disease (COPD). The evidence for efficacy of macrolides in the long-term treatment of chronic asthma and bronchiectasis is less well established. The mechanism(s) of action of macrolides in the treatment of these diseases remains unexplained, but may be due to their antibacterial and/or anti-inflammatory actions, which include reductions in interleukin-8 production, neutrophil migration and/or function. Macrolides have additional potentially beneficial properties including anti-viral actions and an ability to restore corticosteroid sensitivity. The increased prescribing of macrolides for long-term treatment could result in the development of microbial resistance and adverse drug effects. New macrolides have been developed which do not possess any antimicrobial activity and hence lack the ability to produce microbial resistance, but which still retain immunomodulatory effects. Potentially novel macrolides may overcome a significant barrier to the use of this type of drug for the long-term treatment of chronic inflammatory airway diseases.
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Affiliation(s)
- E J Cameron
- Respiratory Medicine, Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.
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13
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The role of macrolides in childhood non-cystic fibrosis-related bronchiectasis. Mediators Inflamm 2012; 2012:134605. [PMID: 22570510 PMCID: PMC3338115 DOI: 10.1155/2012/134605] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 01/31/2012] [Indexed: 12/13/2022] Open
Abstract
Non-cystic fibrosis-related bronchiectasis is a chronic inflammatory lung disease, which is regarded as an “orphan” lung disease, with little research devoted to the study of this condition. Bronchiectasis results in impaired quality of life and mortality if left untreated. The tools available in the armamentarium for the management of bronchiectasis entail antibiotic therapy traditionally used to treat exacerbations, stratagems to improve mucociliary clearance, and avoidance of toxins. Macrolides have been known for the last two decades to have not only anti-bacterial effects but immunomodulatory properties as well. In cystic fibrosis, the use of macrolides is well documented in subjects colonized with Pseudomonas aeruginosa, to improve quality of life and lung function. There is currently emerging evidence to suggest the benefit of macrolides in subjects not colonized with Pseudomonas aeruginosa. This beneficial effect has been less explored in the context of bronchiectasis from other causes. The purpose of this paper is to review the current literature on the use of macrolides in non-cystic fibrosis related bronchiectasis in paediatrics.
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