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Sun YW, Cen YH, Chen MH, Yan XK, Jin XF. Safety profiles and adverse reactions of azithromycin in the treatment of pediatric respiratory diseases: A systematic review and meta-analysis. Medicine (Baltimore) 2023; 102:e36306. [PMID: 38050289 PMCID: PMC10695561 DOI: 10.1097/md.0000000000036306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 11/03/2023] [Indexed: 12/06/2023] Open
Abstract
BACKGROUND Azithromycin (AZM) is an antimicrobial agent and frequently used in the treatment of pediatric respiratory diseases due to its well-recognized clinical efficacy. Despite some favorable findings from many studies, there is a lack of research reports focusing on the safety profiles and adverse reactions. METHODS The randomized controlled trials of AZM in the treatment of pediatric respiratory diseases on internet databases were searched. The search databases included Chinese CNKI, Wanfang, VIP, PubMed, EMBASE, and Cochrane Library. Two researchers of this study independently assessed the eligibility, risk of bias, and extracted the data. The included literature was meta-analyzed and subgroup analyzed by revman 5.1 software. RESULTS A total of 14 eligible studies were included. The results of meta-analysis showed that the incidence of adverse reactions after AZM treatment was 24.20%, which was lower than 48.05% in the control group (OR = 0.42, 95% CI 0.12-0.72, P < .001). In the subgroup of sequential therapy, AZM had a lower incidence of adverse reactions in sequential therapy (OR = 0.29, 95% CI 0.09-0.60, P < .001). In the subgroup of intravenous administration, AZM had a lower the incidence of adverse reactions (OR = 0.57, 95% CI 0.12-0.84, P = .003). In the subgroup of oral administration, AZM had a lower the incidence of adverse reactions (OR = 0.45, 95% CI 0.13-0.69 P < .001). Overall, it was also found that the incidence of adverse reactions in the AZM subgroup was significantly lower than that in other treatment subgroup. CONCLUSION AZM has fewer adverse reactions and better safety profiles, which make AZM a more attractive option in the treatment of pediatric respiratory diseases.
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Affiliation(s)
- Ying-wen Sun
- Department of Pediatrics, The People’s Hospital of Fenghua, Ningbo City, Zhejiang Province, China
| | - Yuan-hua Cen
- Department of Pediatrics, The People’s Hospital of Fenghua, Ningbo City, Zhejiang Province, China
| | - Mu-heng Chen
- Department of Pediatrics, The People’s Hospital of Fenghua, Ningbo City, Zhejiang Province, China
| | - Xu-ke Yan
- Department of Pediatrics, The People’s Hospital of Fenghua, Ningbo City, Zhejiang Province, China
| | - Xiao-fen Jin
- Department of Pediatrics, The People’s Hospital of Fenghua, Ningbo City, Zhejiang Province, China
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2
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Nielsen KG, Holgersen MG, Crowley S, Marthin JK. Chronic airway disease in primary ciliary dyskinesia—spiced with geno–phenotype associations. AMERICAN JOURNAL OF MEDICAL GENETICS PART C: SEMINARS IN MEDICAL GENETICS 2022; 190:20-35. [PMID: 35352480 PMCID: PMC9314966 DOI: 10.1002/ajmg.c.31967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/10/2022] [Accepted: 03/15/2022] [Indexed: 12/01/2022]
Abstract
Primary ciliary dyskinesia (PCD) can be defined as a multiorgan ciliopathy with a dominant element of chronic airway disease affecting the nose, sinuses, middle ear, and in particular, the lower airways. Although most patients with PCD are diagnosed during preschool years, it is obvious that the chronic lung disease starts its course already from birth. The many faces of the clinical picture change, as does lung function, structural lung damage, the burden of infection, and of treatment throughout life. A markedly severe neutrophil inflammation in the respiratory tract seems pervasive and is only to a minimal extent ameliorated by a treatment strategy, which is predominantly aimed at bacterial infections. An ever‐increasing understanding of the different aspects, their interrelationships, and possible different age courses conditioned by the underlying genotype is the focus of much attention. The future is likely to offer personalized medicine in the form of mRNA therapy, but to that end, it is of utmost importance that all patients with PCD be carefully characterized and given a genetic diagnosis. In this narrative review, we have concentrated on lower airways and summarized the current understanding of the chronic airway disease in this motile ciliopathy. In addition, we highlight the challenges, gaps, and opportunities in PCD lung disease research.
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Affiliation(s)
- Kim G Nielsen
- Department of Paediatrics and Adolescent Medicine Danish PCD & chILD Centre, CF Centre Copenhagen, Paediatric Pulmonary Service, ERN Accredited Copenhagen Denmark
- Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
| | - Mathias G Holgersen
- Department of Paediatrics and Adolescent Medicine Danish PCD & chILD Centre, CF Centre Copenhagen, Paediatric Pulmonary Service, ERN Accredited Copenhagen Denmark
| | - Suzanne Crowley
- Paediatric Department of Allergy and Lung Diseases Oslo University Hospital, Rikshospitalet Oslo Norway
| | - June K Marthin
- Department of Paediatrics and Adolescent Medicine Danish PCD & chILD Centre, CF Centre Copenhagen, Paediatric Pulmonary Service, ERN Accredited Copenhagen Denmark
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3
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Burke A, Smith D, Coulter C, Bell SC, Thomson R, Roberts JA. Clinical Pharmacokinetic and Pharmacodynamic Considerations in the Drug Treatment of Non-Tuberculous Mycobacteria in Cystic Fibrosis. Clin Pharmacokinet 2021; 60:1081-1102. [PMID: 33982266 DOI: 10.1007/s40262-021-01010-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2021] [Indexed: 10/21/2022]
Abstract
Non-tuberculous mycobacteria (NTM) are an emerging group of pulmonary infectious pathogens of increasing importance to the management of patients with cystic fibrosis (CF). NTM include slow-growing mycobacteria such as Mycobacterium avium complex (MAC) and rapidly growing mycobacteria such as Mycobacterium abscessus. The incidence of NTM in the CF population is increasing and infection contributes to significant morbidity to the patient and costs to the health system. Treating M. abscessus requires the combination of multiple costly antibiotics for months, with potentially significant toxicity associated with treatment. Although international guidelines for the treatment of NTM infection in CF are available, there are a lack of robust pharmacokinetic studies in CF patients to inform dosing and drug choice. This paper aims to outline the pharmacokinetic and pharmacodynamic factors informing the optimal treatment of NTM infections in CF.
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Affiliation(s)
- Andrew Burke
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland School of Medicine, Brisbane, QLD, Australia
| | - Daniel Smith
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland School of Medicine, Brisbane, QLD, Australia
| | - Chris Coulter
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland School of Medicine, Brisbane, QLD, Australia
| | - Scott C Bell
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland School of Medicine, Brisbane, QLD, Australia.,QIMR Berghofer Medical Research Institute, Herston, QLD, Australia
| | - Rachel Thomson
- Thoracic Medicine, The Prince Charles Hospital, Brisbane, QLD, Australia.,Faculty of Medicine, The University of Queensland School of Medicine, Brisbane, QLD, Australia.,Immunology Department, Gallipoli Medical Research Institute, Brisbane, QLD, Australia
| | - Jason A Roberts
- Faculty of Medicine, University of Queensland Centre for Clinical Research, The University of Queensland, Brisbane, QLD, Australia. .,Department of Pharmacy, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia. .,Department of Intensive Care Medicine, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia. .,Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France.
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4
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Pharmacokinetic and Pharmacodynamic Optimization of Antibiotic Therapy in Cystic Fibrosis Patients: Current Evidences, Gaps in Knowledge and Future Directions. Clin Pharmacokinet 2021; 60:409-445. [PMID: 33486720 DOI: 10.1007/s40262-020-00981-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/20/2020] [Indexed: 10/22/2022]
Abstract
Antibiotic therapy is one of the main treatments for cystic fibrosis (CF). It aims to eradicate bacteria during early infection, calms down the inflammatory process, and leads to symptom resolution of pulmonary exacerbations. CF can modify both the pharmacokinetic (PK) and pharmacodynamic (PD) profiles of antibiotics, therefore specific PK/PD endpoints should be determined in the context of CF. Currently available data suggest that optimal PK/PD targets cannot be attained in sputum with intravenous aminoglycosides. Continuous infusion appears preferable for β-lactam antibiotics, but optimal concentrations in sputum are unlikely to be reached, with some possible exceptions such as meropenem and ceftolozane. Usual doses are likely suboptimal for fluoroquinolones and linezolid, whereas daily doses of 45-60 mg/kg and 200 mg could be convenient for vancomycin and doxycycline, respectively. Weekly azithromycin doses of 22-30 mg/kg could also be appropriate for its anti-inflammatory effect. The difficulty with achieving optimal concentrations supports the use of combined treatments and the inhaled administration route, as very high local concentrations, concomitantly with low systemic exposure, can be obtained with the inhaled route for aminoglycosides, colistin, and fluoroquinolones, thus minimizing the risk of toxicity.
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5
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Efficacy and safety of azithromycin maintenance therapy in primary ciliary dyskinesia (BESTCILIA): a multicentre, double-blind, randomised, placebo-controlled phase 3 trial. THE LANCET RESPIRATORY MEDICINE 2020; 8:493-505. [DOI: 10.1016/s2213-2600(20)30058-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/13/2020] [Accepted: 01/28/2020] [Indexed: 12/18/2022]
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6
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Nazir S, Adnan K, Gul R, Ali G, Saleha S, Khan A. The effect of gender and ABCB1 gene polymorphism on the pharmacokinetics of azithromycin in healthy male and female Pakistani subjects. Can J Physiol Pharmacol 2020; 98:506-510. [PMID: 32125889 DOI: 10.1139/cjpp-2019-0569] [Citation(s) in RCA: 4] [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
In the current study, the possible outcome of gender difference and genotypic polymorphism of the ABCB1 gene encoding P-glycoprotein on the pharmacokinetics of azithromycin has been evaluated. An open-label, comparative pharmacokinetic study was done in healthy Pakistani volunteers (females (n = 8) and males (n = 8)). They were administered a single 500 mg oral dose of azithromycin. Blood samples (≈5 mL) were collected in heparinized tubes and the HPLC/MS/MS method was used to determine azithromycin plasma levels. ABCB1 polymorphism (single nucleotide polymorphisms) at C3435T, G26SST was performed using the RFLP-PCR method. The Student t test was applied to compare pharmacokinetic parameters of azithromycin between male and female human subjects (at 95% CI) using GraphPad Prism-8. A significant difference was observed in pharmacokinetic parameters between males and females, as Cmax in males (230 ± 80.2 ng/mL) was significantly higher than in females (224.9 ± 75.5 ng/mL), while [Formula: see text] was also significantly higher (p < 0.05) in males (2102 ± 200.3 ng·h-1·mL-1) compared to females (1825.7 ± 225.4 ng·h-1·mL-1). There was a significant variation in Cmax and AUC in three ABCB1 genotyping groups as well. Gender difference and ABCB1 gene polymorphisms have a significant impact on the pharmacokinetics of azithromycin, as they contribute to interindividual variability in therapeutic response.
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Affiliation(s)
- Shabnam Nazir
- Department of Pharmacy, Kohat University of Science and Technology, Kohat, Pakistan
| | - Kashif Adnan
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Rukhsana Gul
- Department of Chemistry, Kohat University of Science and Technology, Kohat, Pakistan
| | - Gowhar Ali
- Kohat University of Science and Technology, Kohat, Pakistan.,University of Peshawar, Peshawar, Pakistan
| | - Shamim Saleha
- Department of Biotechnology, Kohat University of Science and Technology, Kohat, Pakistan
| | - Amjad Khan
- Department of Pharmacy, Kohat University of Science and Technology, Kohat, Pakistan
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7
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Mangal S, Nie H, Xu R, Guo R, Cavallaro A, Zemlyanov D, Zhou QT. Physico-Chemical Properties, Aerosolization and Dissolution of Co-Spray Dried Azithromycin Particles with L-Leucine for Inhalation. Pharm Res 2018; 35:28. [PMID: 29374368 DOI: 10.1007/s11095-017-2334-9] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 12/19/2017] [Indexed: 02/07/2023]
Abstract
PURPOSE Inhalation therapy is popular to treat lower respiratory tract infections. Azithromycin is effective against some bacteria that cause respiratory tract infections; but it has poor water solubility that may limit its efficacy when administrated as inhalation therapy. In this study, dry powder inhaler formulations were developed by co-spray drying azithromycin with L-leucine with a purpose to improve dissolution. METHODS The produced powder formulations were characterized regarding particle size, morphology, surface composition and in-vitro aerosolization performance. Effects of L-leucine on the solubility and in-vitro dissolution of azithromycin were also evaluated. RESULTS The spray dried azithromycin alone formulation exhibited a satisfactory aerosol performance with a fine particle fraction (FPF) of 62.5 ± 4.1%. Addition of L-leucine in the formulation resulted in no significant change in particle morphology and FPF, which can be attributed to enrichment of azithromycin on the surfaces of composite particles. Importantly, compared with the spray-dried amorphous azithromycin alone powder, the co-spray dried powder formulations of azithromycin and L-leucine demonstrated a substantially enhanced in-vitro dissolution rate. Such enhanced dissolution of azithromycin could be attributed to the formation of composite system and the acidic microenvironment around azithromycin molecules created by the dissolution of acidic L-leucine in the co-spray dried powder. Fourier transform infrared spectroscopic data showed intermolecular interactions between azithromycin and L-leucine in the co-spray dried formulations. CONCLUSIONS We developed the dry powder formulations with satisfactory aerosol performance and enhanced dissolution for a poorly water soluble weak base, azithromycin, by co-spray drying with an amino acid, L-leucine.
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Affiliation(s)
- Sharad Mangal
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana, 47907, USA
| | - Haichen Nie
- Teva Pharmaceuticals, 145 Brandywine Pkwy, West Chester, Pennsylvania, 19380, USA
| | - Rongkun Xu
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana, 47907, USA.,Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning, 110016, China
| | - Rui Guo
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana, 47907, USA
| | - Alex Cavallaro
- Future Industries Institute, University of South Australia, Mawson Lakes, SA, 5095, Australia
| | - Dmitry Zemlyanov
- Birck Nanotechnology Center, Purdue University, 1205 West State Street, West Lafayette, Indiana, 47907, USA
| | - Qi Tony Zhou
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana, 47907, USA.
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8
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Wang Z, Meenach SA. Synthesis and Characterization of Nanocomposite Microparticles (nCmP) for the Treatment of Cystic Fibrosis-Related Infections. Pharm Res 2016; 33:1862-72. [PMID: 27091030 PMCID: PMC4945441 DOI: 10.1007/s11095-016-1921-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 04/04/2016] [Indexed: 01/08/2023]
Abstract
PURPOSE Pulmonary antibiotic delivery is recommended as maintenance therapy for cystic fibrosis (CF) patients who experience chronic infections. However, abnormally thick and sticky mucus present in the respiratory tract of CF patients impairs mucus penetration and limits the efficacy of inhaled antibiotics. To overcome the obstacles of pulmonary antibiotic delivery, we have developed nanocomposite microparticles (nCmP) for the inhalation application of antibiotics in the form of dry powder aerosols. METHODS Azithromycin-loaded and rapamycin-loaded polymeric nanoparticles (NP) were prepared via nanoprecipitation and nCmP were prepared by spray drying and the physicochemical characteristics were evaluated. RESULTS The nanoparticles were 200 nm in diameter both before loading into and after redispersion from nCmP. The NP exhibited smooth, spherical morphology and the nCmP were corrugated spheres about 1 μm in diameter. Both drugs were successfully encapsulated into the NP and were released in a sustained manner. The NP were successfully loaded into nCmP with favorable encapsulation efficacy. All materials were stable at manufacturing and storage conditions and nCmP were in an amorphous state after spray drying. nCmP demonstrated desirable aerosol dispersion characteristics, allowing them to deposit into the deep lung regions for effective drug delivery. CONCLUSIONS The described nCmP have the potential to overcome mucus-limited pulmonary delivery of antibiotics.
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Affiliation(s)
- Zimeng Wang
- Department of Chemical Engineering, University of Rhode Island, 202 Crawford Hall, 16 Greenhouse Road, Kingston, RI, 02881, USA
| | - Samantha A Meenach
- Department of Chemical Engineering, University of Rhode Island, 202 Crawford Hall, 16 Greenhouse Road, Kingston, RI, 02881, USA.
- Department of Biomedical and Pharmaceutical Sciences, University of Rhode Island, Kingston, RI, 02881, USA.
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9
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Weckmann M, Schultheiss C, Hollaender A, Bobis I, Rupp J, Kopp MV. Treatment with rhDNase in patients with cystic fibrosis alters in-vitro CHIT-1 activity of isolated leucocytes. Clin Exp Immunol 2016; 185:382-91. [PMID: 27324468 DOI: 10.1111/cei.12827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2016] [Indexed: 11/28/2022] Open
Abstract
Recent data suggest a possible relationship between cystic fibrosis (CF) pharmacotherapy, Aspergillus fumigatus colonization (AC) and/or allergic bronchopulmonary aspergillosis (ABPA). The aim of this study was to determine if anti-fungal defence mechanisms are influenced by CF pharmacotherapy, i.e. if (1) neutrophils form CF and non-CF donors differ in their ability to produce chitotriosidase (CHIT-1); (2) if incubation of isolated neutrophils with azithromycin, salbutamol, prednisolone or rhDNase might influence the CHIT-1 activity; and (3) if NETosis and neutrophil killing efficiency is influenced by rhDNase. Neutrophils were isolated from the blood of CF patients (n = 19; mean age 26·8 years or healthy, non-CF donors (n = 20; 38·7 years) and stimulated with phorbol-12-myristate-13-acetate (PMA), azithromycin, salbutamol, prednisolone or rhDNase. CHIT-1 enzyme activity was measured with a fluorescent substrate. NETosis was induced by PMA and neutrophil killing efficiency was assessed by a hyphae recovery assay. Neutrophil CHIT-1 activity was comparable in the presence or absence of PMA stimulation in both CF and non-CF donors. PMA stimulation and preincubation with rhDNase increased CHIT-1 activity in culture supernatants from non-CF and CF donors. However, this increase was significant in non-CF donors but not in CF patients (P < 0·05). RhDNase reduced the number of NETs in PMA-stimulated neutrophils and decreased the killing efficiency of leucocytes in our in-vitro model. Azithromycin, salbutamol or prednisolone had no effect on CHIT-1 activity. Stimulation of isolated leucocytes with PMA and treatment with rhDNase interfered with anti-fungal defence mechanisms. However, the impact of our findings for treatment in CF patients needs to be proved in a clinical cohort.
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Affiliation(s)
- M Weckmann
- Department of Pediatric Allergy and Pulmonology, Clinic of Pediatrics UKSH, University of Luebeck, Luebeck.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL)
| | - C Schultheiss
- Department of Pediatric Allergy and Pulmonology, Clinic of Pediatrics UKSH, University of Luebeck, Luebeck.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL)
| | - A Hollaender
- Department of Pediatric Allergy and Pulmonology, Clinic of Pediatrics UKSH, University of Luebeck, Luebeck.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL)
| | - I Bobis
- Clinic of Internal Medicine, UKSH, University of Kiel, Kiel
| | - J Rupp
- Department of Molecular and Clinical Infectious Diseases, University of Luebeck, Luebeck, Germany
| | - M V Kopp
- Department of Pediatric Allergy and Pulmonology, Clinic of Pediatrics UKSH, University of Luebeck, Luebeck.,Airway Research Center North (ARCN), Member of the German Center for Lung Research (DZL)
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10
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Kobbernagel HE, Buchvald FF, Haarman EG, Casaulta C, Collins SA, Hogg C, Kuehni CE, Lucas JS, Omran H, Quittner AL, Werner C, Nielsen KG. Study protocol, rationale and recruitment in a European multi-centre randomized controlled trial to determine the efficacy and safety of azithromycin maintenance therapy for 6 months in primary ciliary dyskinesia. BMC Pulm Med 2016; 16:104. [PMID: 27450411 PMCID: PMC4957315 DOI: 10.1186/s12890-016-0261-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 06/25/2016] [Indexed: 11/24/2022] Open
Abstract
Background Clinical management of primary ciliary dyskinesia (PCD) respiratory disease is currently based on improving mucociliary clearance and controlling respiratory infections, through the administration of antibiotics. Treatment practices in PCD are largely extrapolated from more common chronic respiratory disorders, particularly cystic fibrosis, but no randomized controlled trials (RCT) have ever evaluated efficacy and safety of any pharmacotherapeutics used in the treatment of PCD. Maintenance therapy, with the macrolide antibiotic azithromycin, is currently widely used in chronic respiratory diseases including PCD. In addition to its antibacterial properties, azithromycin is considered to have beneficial anti-inflammatory and anti-quorum-sensing properties. The aim of this study is to determine the efficacy of azithromycin maintenance therapy for 6 months on respiratory exacerbations in PCD. The secondary objectives are to evaluate the efficacy of azithromycin on lung function, ventilation inhomogeneity, hearing impairment, and symptoms (respiratory, sinus, ears and hearing) measured on a PCD-specific health-related quality of life instrument, and to assess the safety of azithromycin maintenance therapy in PCD. Methods The BESTCILIA trial is a European multi-centre, double-blind, randomized, placebo-controlled, parallel group study. The intervention is tablets of azithromycin 250/500 mg according to body weight or placebo administered three times a week for 6 months. Subjects with a confirmed diagnosis of PCD, age 7–50 years, are eligible for inclusion. Chronic pulmonary infections with Gram-negative bacteria or any recent occurrence of non-tuberculous mycobacteria are exclusion criteria. The planned number of subjects to be included is 125. The trial has been approved by the Research Ethics Committees of the participating institutions. Discussion We present a study protocol of an ongoing RCT, evaluating for the first time, the efficacy and safety of a pharmacotherapeutic treatment for patients with PCD. The RCT evaluates azithromycin maintenance therapy, a drug already commonly prescribed in other chronic respiratory disorders. Furthermore, the trial will utilize the Lung clearance index and new, PCD-specific quality of life instruments as outcome measures for PCD. Recruitment is hampered by frequent occurrence of Pseudomonas aeruginosa infection, exacerbations at enrolment, and the patients’ perception of disease severity and necessity of additional management and treatment during trial participation. Trial registration EudraCT 2013-004664-58 (date of registration: 2014-04-08).
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Affiliation(s)
- Helene E Kobbernagel
- Danish Paediatric Pulmonary Service, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Frederik F Buchvald
- Danish Paediatric Pulmonary Service, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Eric G Haarman
- Department of Pediatric Pulmonology, VU University Medical Center, Amsterdam, Netherlands
| | - Carmen Casaulta
- Division of Respiratory Medicine, Department of Pediatrics, Inselspital and University of Bern, Bern, Switzerland
| | - Samuel A Collins
- PCD Centre, NIHR Respiratory Biomedical Research Unit and Wellcome Trust Clinical Research Facility, University of Southampton, Southampton, UK
| | - Claire Hogg
- Paediatric Respiratory Department, Royal Brompton Hospital, London, UK
| | - Claudia E Kuehni
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Jane S Lucas
- PCD Centre, NIHR Respiratory Biomedical Research Unit and Wellcome Trust Clinical Research Facility, University of Southampton, Southampton, UK
| | - Heymut Omran
- Department of General Paediatrics, University Children's Hospital Muenster, Muenster, Germany
| | | | - Claudius Werner
- Department of General Paediatrics, University Children's Hospital Muenster, Muenster, Germany
| | - Kim G Nielsen
- Danish Paediatric Pulmonary Service, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
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11
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Floto RA, Olivier KN, Saiman L, Daley CL, Herrmann JL, Nick JA, Noone PG, Bilton D, Corris P, Gibson RL, Hempstead SE, Koetz K, Sabadosa KA, Sermet-Gaudelus I, Smyth AR, van Ingen J, Wallace RJ, Winthrop KL, Marshall BC, Haworth CS. US Cystic Fibrosis Foundation and European Cystic Fibrosis Society consensus recommendations for the management of non-tuberculous mycobacteria in individuals with cystic fibrosis. Thorax 2016; 71 Suppl 1:i1-22. [PMID: 26666259 PMCID: PMC4717371 DOI: 10.1136/thoraxjnl-2015-207360] [Citation(s) in RCA: 299] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Non-tuberculous mycobacteria (NTM) are ubiquitous environmental organisms that can cause chronic pulmonary infection, particularly in individuals with pre-existing inflammatory lung disease such as cystic fibrosis (CF). Pulmonary disease caused by NTM has emerged as a major threat to the health of individuals with CF but remains difficult to diagnose and problematic to treat. In response to this challenge, the US Cystic Fibrosis Foundation (CFF) and the European Cystic Fibrosis Society (ECFS) convened an expert panel of specialists to develop consensus recommendations for the screening, investigation, diagnosis and management of NTM pulmonary disease in individuals with CF. Nineteen experts were invited to participate in the recommendation development process. Population, Intervention, Comparison, Outcome (PICO) methodology and systematic literature reviews were employed to inform draft recommendations. An anonymous voting process was used by the committee to reach consensus. All committee members were asked to rate each statement on a scale of: 0, completely disagree, to 9, completely agree; with 80% or more of scores between 7 and 9 being considered ‘good’ agreement. Additionally, the committee solicited feedback from the CF communities in the USA and Europe and considered the feedback in the development of the final recommendation statements. Three rounds of voting were conducted to achieve 80% consensus for each recommendation statement. Through this process, we have generated a series of pragmatic, evidence-based recommendations for the screening, investigation, diagnosis and treatment of NTM infection in individuals with CF as an initial step in optimising management for this challenging condition.
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Affiliation(s)
- R Andres Floto
- Cambridge Institute for Medical Research, University of Cambridge, Cambridge, UK Cambridge Centre for Lung Infection, Papworth Hospital, Cambridge, UK
| | - Kenneth N Olivier
- Cardiovascular and Pulmonary Branch, National Heart, Lung, and Blood Institute, NIH, Bethesda, Maryland, USA
| | - Lisa Saiman
- Department of Pediatrics, Columbia University Medical Center, Pediatric Infectious Diseases, New York, New York, USA
| | - Charles L Daley
- Division of Mycobacterial and Respiratory Infections, National Jewish Health, Denver, Colorado, USA
| | - Jean-Louis Herrmann
- INSERM U1173, UFR Simone Veil, Versailles-Saint-Quentin University, Saint-Quentin en Yvelines, France AP-HP, Service de Microbiologie, Hôpital Raymond Poincaré, Garches, France
| | - Jerry A Nick
- Department of Medicine, National Jewish Health, Denver, Colorado, USA
| | - Peadar G Noone
- The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Diana Bilton
- Department of Respiratory Medicine, Royal Brompton Hospital, London, UK
| | - Paul Corris
- Department of Respiratory Medicine, Freeman Hospital, High Heaton, Newcastle, UK
| | - Ronald L Gibson
- Department of Pediatrics University of Washington School of Medicine, Seattle, Washington, USA
| | - Sarah E Hempstead
- The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Karsten Koetz
- Department of Pediatrics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Kathryn A Sabadosa
- The Dartmouth Institute for Health Policy and Clinical Practice, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA
| | - Isabelle Sermet-Gaudelus
- Service de Pneumo-Pédiatrie, Université René Descartes, Hôpital Necker-Enfants Malades, Paris, France
| | - Alan R Smyth
- Division of Child Health, Obstetrics & Gynaecology, University of Nottingham, Nottingham, UK
| | - Jakko van Ingen
- Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Richard J Wallace
- Department of Microbiology, University of Texas Health Science Center, Tyler, Texas, USA
| | | | | | - Charles S Haworth
- Cambridge Centre for Lung Infection, Papworth Hospital, Cambridge, UK
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Abstract
Cystic fibrosis (CF) is an autosomal recessive inherited metabolic disease. The mutation is located on the long arm of chromosome 7. Due to a defect in the cystic fibrosis transmembrane conductance regulator (CFTR) gene, chloride ion transport is reduced across the cell membrane. As a result, the disease can be described as an exocrinopathy. In all organs with exocrine glands, disorders occur in association with the defective chloride transport. The main impact of this defect is manifested in the lungs. Therefore, the most common cause of death is pulmonary disease with respiratory insufficiency due to recurrent infections. Unfortunately, a cure for the disease is still not available. However, new therapies that may affect the CFTR mutation more specifically give new hope for better therapeutic options in the future. The long-term goal of therapy is to develop a causal therapy for all six different mutation classes and thus for about 2000 mutations.
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Affiliation(s)
- C Schwarz
- Christiane Herzog-Zentrum, Sektion Cystische Fibrose, Klinik für Pädiatrie m. S. Pneumologie und Immunologie, Charité Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, 13353, Berlin, Deutschland,
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13
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Alton EWFW, Armstrong DK, Ashby D, Bayfield KJ, Bilton D, Bloomfield EV, Boyd AC, Brand J, Buchan R, Calcedo R, Carvelli P, Chan M, Cheng SH, Collie DDS, Cunningham S, Davidson HE, Davies G, Davies JC, Davies LA, Dewar MH, Doherty A, Donovan J, Dwyer NS, Elgmati HI, Featherstone RF, Gavino J, Gea-Sorli S, Geddes DM, Gibson JSR, Gill DR, Greening AP, Griesenbach U, Hansell DM, Harman K, Higgins TE, Hodges SL, Hyde SC, Hyndman L, Innes JA, Jacob J, Jones N, Keogh BF, Limberis MP, Lloyd-Evans P, Maclean AW, Manvell MC, McCormick D, McGovern M, McLachlan G, Meng C, Montero MA, Milligan H, Moyce LJ, Murray GD, Nicholson AG, Osadolor T, Parra-Leiton J, Porteous DJ, Pringle IA, Punch EK, Pytel KM, Quittner AL, Rivellini G, Saunders CJ, Scheule RK, Sheard S, Simmonds NJ, Smith K, Smith SN, Soussi N, Soussi S, Spearing EJ, Stevenson BJ, Sumner-Jones SG, Turkkila M, Ureta RP, Waller MD, Wasowicz MY, Wilson JM, Wolstenholme-Hogg P. Repeated nebulisation of non-viral CFTR gene therapy in patients with cystic fibrosis: a randomised, double-blind, placebo-controlled, phase 2b trial. THE LANCET RESPIRATORY MEDICINE 2015; 3:684-691. [PMID: 26149841 PMCID: PMC4673100 DOI: 10.1016/s2213-2600(15)00245-3] [Citation(s) in RCA: 290] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 06/08/2015] [Accepted: 06/09/2015] [Indexed: 01/08/2023]
Abstract
Background Lung delivery of plasmid DNA encoding the CFTR gene complexed with a cationic liposome is a potential treatment option for patients with cystic fibrosis. We aimed to assess the efficacy of non-viral CFTR gene therapy in patients with cystic fibrosis. Methods We did this randomised, double-blind, placebo-controlled, phase 2b trial in two cystic fibrosis centres with patients recruited from 18 sites in the UK. Patients (aged ≥12 years) with a forced expiratory volume in 1 s (FEV1) of 50–90% predicted and any combination of CFTR mutations, were randomly assigned, via a computer-based randomisation system, to receive 5 mL of either nebulised pGM169/GL67A gene–liposome complex or 0·9% saline (placebo) every 28 days (plus or minus 5 days) for 1 year. Randomisation was stratified by % predicted FEV1 (<70 vs ≥70%), age (<18 vs ≥18 years), inclusion in the mechanistic substudy, and dosing site (London or Edinburgh). Participants and investigators were masked to treatment allocation. The primary endpoint was the relative change in % predicted FEV1. The primary analysis was per protocol. This trial is registered with ClinicalTrials.gov, number NCT01621867. Findings Between June 12, 2012, and June 24, 2013, we randomly assigned 140 patients to receive placebo (n=62) or pGM169/GL67A (n=78), of whom 116 (83%) patients comprised the per-protocol population. We noted a significant, albeit modest, treatment effect in the pGM169/GL67A group versus placebo at 12 months' follow-up (3·7%, 95% CI 0·1–7·3; p=0·046). This outcome was associated with a stabilisation of lung function in the pGM169/GL67A group compared with a decline in the placebo group. We recorded no significant difference in treatment-attributable adverse events between groups. Interpretation Monthly application of the pGM169/GL67A gene therapy formulation was associated with a significant, albeit modest, benefit in FEV1 compared with placebo at 1 year, indicating a stabilisation of lung function in the treatment group. Further improvements in efficacy and consistency of response to the current formulation are needed before gene therapy is suitable for clinical care; however, our findings should also encourage the rapid introduction of more potent gene transfer vectors into early phase trials. Funding Medical Research Council/National Institute for Health Research Efficacy and Mechanism Evaluation Programme.
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Affiliation(s)
| | | | | | | | - Diana Bilton
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | | | - A Christopher Boyd
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - June Brand
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | | | - Roberto Calcedo
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | | | | | - D David S Collie
- The Roslin Institute and R(D)SVS, University of Edinburgh, Edinburgh, UK
| | | | - Heather E Davidson
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | | | | | - Lee A Davies
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | - Ann Doherty
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Jackie Donovan
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | | | | | | | | | | | - Duncan M Geddes
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - James S R Gibson
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Deborah R Gill
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | | | - David M Hansell
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | | | | | | | - Stephen C Hyde
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Laura Hyndman
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | | | - Joseph Jacob
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Nancy Jones
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Brian F Keogh
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Maria P Limberis
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Alan W Maclean
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | | | - Dominique McCormick
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | - Gerry McLachlan
- The Roslin Institute and R(D)SVS, University of Edinburgh, Edinburgh, UK
| | | | | | | | - Laura J Moyce
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Gordon D Murray
- Usher Institute of Population Health Sciences and Informatics and Centre for Population Health Sciences, University of Edinburgh, Edinburgh, UK
| | | | - Tina Osadolor
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | - Javier Parra-Leiton
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - David J Porteous
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Ian A Pringle
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | | | | | | | | | | | - Sarah Sheard
- Royal Brompton and Harefield NHS Foundation Trust, London, UK
| | | | | | | | | | | | | | - Barbara J Stevenson
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Stephanie G Sumner-Jones
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | | | | | | | | | - James M Wilson
- Gene Therapy Program, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
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14
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Consensus national sur la prescription de l’azithromycine dans la mucoviscidose. Rev Mal Respir 2015; 32:557-65. [DOI: 10.1016/j.rmr.2014.10.733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 10/19/2014] [Indexed: 01/22/2023]
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15
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Cantón R, Máiz L, Escribano A, Olveira C, Oliver A, Asensio O, Gartner S, Roma E, Quintana-Gallego E, Salcedo A, Girón R, Barrio MI, Pastor MD, Prados C, Martínez-Martínez MT, Barberán J, Castón JJ, Martínez-Martínez L, Poveda JL, Vázquez C, de Gracia J, Solé A. Spanish Consensus on the Prevention and Treatment of Pseudomonas aeruginosa Bronchial Infections in Cystic Fibrosis Patients. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.arbr.2014.09.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Azithromycin use in patients with cystic fibrosis. Eur J Clin Microbiol Infect Dis 2015; 34:1071-9. [DOI: 10.1007/s10096-015-2347-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2015] [Accepted: 02/01/2015] [Indexed: 12/14/2022]
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17
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Cantón R, Máiz L, Escribano A, Olveira C, Oliver A, Asensio O, Gartner S, Roma E, Quintana-Gallego E, Salcedo A, Girón R, Barrio MI, Pastor MD, Prados C, Martínez-Martínez MT, Barberán J, Castón JJ, Martínez-Martínez L, Poveda JL, Vázquez C, de Gracia J, Solé A. Spanish consensus on the prevention and treatment of Pseudomonas aeruginosa bronchial infections in cystic fibrosis patients. Arch Bronconeumol 2015; 51:140-50. [PMID: 25614377 DOI: 10.1016/j.arbres.2014.09.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2014] [Accepted: 09/22/2014] [Indexed: 01/22/2023]
Abstract
Pseudomonas aeruginosa is the main pathogen in bronchopulmonary infections in cystic fibrosis (CF) patients. It can only be eradicated at early infection stages while reduction of its bacterial load is the therapeutic goal during chronic infection or exacerbations. Neonatal screening and pharmacokinetic/pharmacodynamic knowledge has modified the management of CF-patients. A culture based microbiological follow-up should be performed in patients with no infection with P.aeruginosa. At initial infection, inhaled colistin (0,5-2MU/tid), tobramycin (300mg/bid) or aztreonam (75mg/tid) with or without oral ciprofloxacin (15-20mg/kg/bid, 2-3weeks) are recommended. In chronic infections, treatment is based on continuous administration of colistin or with a 28-day on-off regimen with tobramycin or aztreonam. During mild-moderate exacerbations oral ciprofloxacin (2-3weeks) can be administered while serious exacerbations must be treated with intravenous combination therapy (beta-lactam with an aminoglycoside or a fluoroquinolone). Future studies will support antibiotic rotation and/or new combination therapies. Epidemiological measures are also recommended to avoid new P.aeruginosa infections and "patient-to-patient transmission" of this pathogen.
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Affiliation(s)
- Rafael Cantón
- Servicio de Microbiología, Hospital Universitario Ramón y Cajal e Instituto Ramón y Cajal de Investigaciones Sanitarias (IRYCIS), Madrid, España; Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España.
| | - Luis Máiz
- Unidad de Bronquiectasias y Fibrosis Quística, Servicio de Neumología, Hospital Universitario Ramón y Cajal e Instituto Ramón y Cajal de Investigaciones Sanitarias (IRYCIS), Madrid, España
| | - Amparo Escribano
- Unidad de Neumología Pediátrica y Fibrosis Quística, Servicio de Pediatría, Hospital Clínico Universitario, Universidad de Valencia, Valencia, España
| | - Casilda Olveira
- Unidad de Gestión Clínica de Enfermedades Respiratorias, Hospital Regional Universitario de Málaga, Instituto de Investigación Biomédica de Málaga (IBIMA), Universidad de Málaga, Málaga, España
| | - Antonio Oliver
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España; Servicio de Microbiología y Unidad de Investigación, Hospital Universitario Son Espases, Instituto de Investigación Sanitaria de Palma (IdISPa), Palma de Mallorca, España
| | - Oscar Asensio
- Unidad de Neumología y Alergia Pediátrica, Hospital Universitario de Sabadell. Corporació Sanitària Parc Taulí, Sabadell, Barcelona, España
| | - Silvia Gartner
- Unidad de Neumología Pediátrica y Fibrosis Quística, Hospital Universitario Vall d'Hebron, Barcelona, España
| | - Eva Roma
- Servicio de Farmacia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Esther Quintana-Gallego
- Unidad de Fibrosis Quística, Servicio de Neumología, Hospital Universitario Virgen del Rocío, Sevilla, España
| | - Antonio Salcedo
- Unidad de Fibrosis Quística Interhospitalaria Niño Jesús-Gregorio Marañón, Madrid, España
| | - Rosa Girón
- Unidad de Bronquiectasias y Fibrosis Quística, Hospital Universitario La Princesa, Instituto La Princesa de Investigación Sanitaria, Madrid, España
| | - María Isabel Barrio
- Sección de Neumología Pediátrica y Unidad de Fibrosis Quística, Hospital Universitario La Paz, Madrid, España
| | - María Dolores Pastor
- Unidad de Neumología Pediátrica y Fibrosis Quística, Hospital Universitario Virgen de la Arrixaca, Murcia, España
| | - Concepción Prados
- Unidad de Fibrosis Quística y Bronquiectasias, Servicio de Neumología, Hospital Universitario La Paz, Madrid, España
| | | | - José Barberán
- Departamento de Medicina Interna, Hospital Montepríncipe, Universidad CEU San Pablo, Madrid, España
| | - Juan José Castón
- Unidad de Enfermedades Infecciosas, Hospital General Universitario de Ciudad Real, Ciudad Real, España
| | - Luis Martínez-Martínez
- Red Española de Investigación en Patología Infecciosa (REIPI), Instituto de Salud Carlos III, Madrid, España; Servicio de Microbiología, Hospital Universitario Marqués de Valdecilla-IDIVAL y Departamento de Biología Molecular, Universidad de Cantabria, Santander, España
| | - José Luis Poveda
- Servicio de Farmacia, Hospital Universitario y Politécnico La Fe, Valencia, España
| | - Carlos Vázquez
- Unidad de Neumología Pediátrica y Fibrosis Quística, Hospital Universitario de Cruces, Baracaldo, Vizcaya, España
| | - Javier de Gracia
- Servicio de Neumología y CIBER en Enfermedades Respiratorias (CibeRES), Hospital Universitari Vall d'Hebron, Universidad Autónoma, Barcelona, España
| | - Amparo Solé
- Unidad de Trasplante Pulmonar y Fibrosis Quística, Hospital Universitario y Politécnico la Fe, Valencia, España.
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An optimal LC-MS/MS method for determination of azithromycin in white blood cells: application to pediatric samples. Bioanalysis 2014; 6:2317-28. [DOI: 10.4155/bio.14.81] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: Studies suggest that particular antimicrobial and anti-inflammatory properties of azithromycin (AZM) can be related to its extensive accumulation in white blood cells (WBCs). However, available methods for determination of AZM in WBCs require large blood volumes unsuited to a pediatric context. Therefore, an LC-MS/MS method was developed for determination of AZM in WBCs. Results: WBCs were isolated from 500 µl of whole blood by lysing red blood cells. Then, lysis of WBCs was performed with methanol/buffer containing AZM-d3-13C as internal standard. After reversed phase LC, detection was performed under multiple reaction monitoring conditions in positive electrospray mode. Linearity ranged from 0.5 to 200 ng per WBC sample. Within-run and overall accuracy and precision ranged from 95.3 to 101.1% and from 1.6 to 4.7%, respectively. All validation parameters fulfilled international requirements. Conclusions: This method can be easily performed on small samples and provides reliable data, including in children and neonates.
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19
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Maurer FP, Castelberg C, Quiblier C, Böttger EC, Somoskövi A. Erm(41)-dependent inducible resistance to azithromycin and clarithromycin in clinical isolates of Mycobacterium abscessus. J Antimicrob Chemother 2014; 69:1559-63. [PMID: 24500188 DOI: 10.1093/jac/dku007] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES The ribosomal methylase Erm(41) confers inducible resistance to macrolides in Mycobacterium abscessus. The aim of this work was to systematically study and compare drug susceptibility to clarithromycin and azithromycin in M. abscessus and Mycobacterium chelonae clinical isolates with a particular focus on inducible drug resistance. METHODS Clinical isolates of M. abscessus subsp. abscessus (n = 21), M. abscessus subsp. bolletii (n = 16), M. abscessus subsp. massiliense (n = 10) and M. chelonae (n = 22) were characterized regarding their erm(41) and rrl genotypes and subjected to drug susceptibility testing (DST) for clarithromycin and azithromycin. Microdilution DST was performed in cation-adjusted Mueller-Hinton broth (pH 7.4) with readings at days 3, 7 and 12 and with pre-incubation at subinhibitory macrolide concentrations for erm(41) induction. In addition, the influence of variations in pH and growth medium on DST results was examined. RESULTS MICs of azithromycin were consistently higher than those of clarithromycin. In strains with an inducible erm(41) gene, high median MICs of ≥256 mg/L on day 12 were observed for both clarithromycin and azithromycin. Inducible resistance was at least as pronounced for azithromycin as for clarithromycin. CONCLUSIONS Our findings do not support the suggestion of a preferential use of azithromycin over clarithromycin in order to limit inducible macrolide resistance. Both compounds provoked a comparable resistance phenotype in M. abscessus. Caution is needed when using either azithromycin or clarithromycin for treatment of M. abscessus infections.
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Affiliation(s)
- Florian P Maurer
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland Nationales Zentrum für Mykobakterien, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Claudio Castelberg
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Chantal Quiblier
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Erik C Böttger
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland Nationales Zentrum für Mykobakterien, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
| | - Akos Somoskövi
- Institut für Medizinische Mikrobiologie, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland Nationales Zentrum für Mykobakterien, Universität Zürich, Gloriastrasse 30/32, 8006 Zürich, Switzerland
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