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Bouazza N, Urien S, Foissac F, Choupeaux L, Lui G, Froelicher Bournaud L, Rouillon S, Zheng Y, Bardin E, Stremler N, Bessaci K, Bihouee T, Coirier-Duet E, Marguet C, Deneuville E, Laurans M, Reix P, Gerardin M, Mittaine M, Epaud R, Thumerelle C, Weiss L, Berthaud R, Semeraro M, Treluyer JM, Benaboud S, Sermet-Gaudelus I. Lumacaftor/Ivacaftor Population Pharmacokinetics in Pediatric Patients with Cystic Fibrosis: A First Step Toward Personalized Therapy. Clin Pharmacokinet 2024; 63:333-342. [PMID: 38310629 DOI: 10.1007/s40262-023-01342-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2023] [Indexed: 02/06/2024]
Abstract
BACKGROUND A major breakthrough in cystic fibrosis (CF) therapy was achievedAQ1 with CFTR modulators. The lumacaftor/ivacaftor combination is indicated for the treatment of CF in pediatric patients above 6 years old. Pharmacokinetic (PK) studies of lumacaftor/ivacaftor in these vulnerable pediatric populations are AQ2crucial to optimize treatment protocols. OBJECTIVES AND METHODS The objectives of this study were to describe the population PK (PPK) of lumacaftor and ivacaftor in children with CF, and to identify factors associated with interindividual variability. The association between drug exposure and clinical response was also investigated. RESULTS A total of 75 children were included in this PPK study, with 191 concentrations available for each compound and known metabolites (lumacaftor, ivacaftor, ivacaftor-M1, and ivacaftor-M6). PPK analysis was performed using Monolix software. A large interindividual variability was observed. The main sources of interpatient variability identified were patient bodyweight and hepatic function (aspartate aminotransferase). Forced expiratory volume in the first second (FEV1) was statistically associated with the level of exposure to ivacaftor after 48 weeks of treatment. CONCLUSIONS This study is the first analysis of lumacaftor/ivacaftor PPK in children with CF. These data suggest that dose adjustment is required after identifying variability factors to optimize efficacy. The use of therapeutic drug monitoring as a basis for dose adjustment in children with CF may be useful.
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Affiliation(s)
- Naïm Bouazza
- Université Paris Cité, EA7323, Paris, France.
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France.
- CIC-1419 Inserm, Cochin-Necker, Paris, France.
| | - Saïk Urien
- Université Paris Cité, EA7323, Paris, France
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France
- CIC-1419 Inserm, Cochin-Necker, Paris, France
| | - Frantz Foissac
- Université Paris Cité, EA7323, Paris, France
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France
- CIC-1419 Inserm, Cochin-Necker, Paris, France
| | - Laure Choupeaux
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France
| | - Gabrielle Lui
- Université Paris Cité, EA7323, Paris, France
- Service de Pharmacologie Clinique, Hôpital Cochin, AP-HP, Groupe Hospitalier Paris Centre, Paris, France
| | - Léo Froelicher Bournaud
- Université Paris Cité, EA7323, Paris, France
- Service de Pharmacologie Clinique, Hôpital Cochin, AP-HP, Groupe Hospitalier Paris Centre, Paris, France
| | - Steeve Rouillon
- Service de Pharmacologie Clinique, Hôpital Cochin, AP-HP, Groupe Hospitalier Paris Centre, Paris, France
| | - Yi Zheng
- Service de Pharmacologie Clinique, Hôpital Cochin, AP-HP, Groupe Hospitalier Paris Centre, Paris, France
| | - Emmanuelle Bardin
- INSERM, CNRS, Institut Necker-Enfants Malades, Paris, France
- Département de Biotechnologie de la Santé, Université Paris-Saclay, UVSQ, INSERM U1173, Infection et inflammation, Montigny le Bretonneux, France
- Hôpital Necker Enfants Malades, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Paris, France
| | - Nathalie Stremler
- Paediatric Cystic Fibrosis Resources and Competences Centre, Hôpital de la Timone, CHU de Marseille, Marseille, France
| | - Katia Bessaci
- Mixed Cystic Fibrosis Resources and Competences Centre, Hôpital Américain, Reims, France
| | - Tiphaine Bihouee
- Chronic Childhood Diseases Unit, Pediatric Department, Nantes University Hospital, Nantes, France
| | | | - Christophe Marguet
- Centre de Ressources et de Compétences de la Mucoviscidose, Centre Hospitalier Universitaire Charles Nicolle, Rouen, France
| | - Eric Deneuville
- Centre Hospitalier Universitaire de Rennes, Centre de Ressource et de Compétences de la Mucoviscidose, Rennes, France
| | - Muriel Laurans
- Centre de Ressources et de Compétences de la Mucoviscidose, Centre Hospitalier Universitaire de Caen Normandie, Caen, France
| | - Philippe Reix
- Centre de ressources et de compétences pour la mucoviscidose, Site Pédiatrique, Hôpital Femme Mère Enfant, Hospices Civils de Lyon, Lyon, France
- Université de Lyon, université Lyon, CNRS, UMR 5558, équipe EMET, 69100, Villeurbanne, France
| | - Michèle Gerardin
- CF Pediatric Centre, Robert Debré Hospital, AP-HP, 75019, Paris, France
| | - Marie Mittaine
- Centre de ressources et de compétences pour la mucoviscidose, Hôpital des enfants, CHU Toulouse, Toulouse, France
| | - Ralph Epaud
- Pediatric Department, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Caroline Thumerelle
- Paediatric Pulmonology and Allergy Unit, Hôpital Jeanne de Flandre, CHU Lille, Université de Lille, 59000, Lille, France
| | - Laurence Weiss
- Centre de Ressources et de Compétences de la Mucoviscidose, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Romain Berthaud
- Université Paris Cité, EA7323, Paris, France
- CIC-1419 Inserm, Cochin-Necker, Paris, France
| | - Michaela Semeraro
- Université Paris Cité, EA7323, Paris, France
- CIC-1419 Inserm, Cochin-Necker, Paris, France
| | - Jean-Marc Treluyer
- Université Paris Cité, EA7323, Paris, France
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France
- CIC-1419 Inserm, Cochin-Necker, Paris, France
| | - Sihem Benaboud
- Université Paris Cité, EA7323, Paris, France
- Unité de Recherche Clinique Necker Cochin, AP-HP, Paris, France
- Service de Pharmacologie Clinique, Hôpital Cochin, AP-HP, Groupe Hospitalier Paris Centre, Paris, France
| | - Isabelle Sermet-Gaudelus
- Hôpital Necker Enfants Malades, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Paris, France
- Université Paris-Cité, Paris, France
- ERN-Lung CF network, Frankfurt, Germany
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Krasnova M, Efremova A, Bukhonin A, Zhekaite E, Bukharova T, Melyanovskaya Y, Goldshtein D, Kondratyeva E. The Effect of Complex Alleles of the CFTR Gene on the Clinical Manifestations of Cystic Fibrosis and the Effectiveness of Targeted Therapy. Int J Mol Sci 2023; 25:114. [PMID: 38203285 PMCID: PMC10779438 DOI: 10.3390/ijms25010114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 01/12/2024] Open
Abstract
The authors of this article analyzed the available literature with the results of studying the prevalence of complex alleles of the CFTR gene among patients with cystic fibrosis, and their pathogenicity and influence on targeted therapy with CFTR modulators. Cystic fibrosis (CF) is a multisystemic autosomal recessive disease caused by a defect in the expression of the CFTR protein, and more than 2000 genetic variants are known. Clinically significant variants are divided into seven classes. Information about the frequency of complex alleles appears in a number of registers, along with the traditional presentation of data on genetic variants. Complex alleles (those with the presence of more than two nucleotide variants on one allele) can complicate the diagnosis of the disease, and change the clinical manifestations of cystic fibrosis and the response to treatment, since each variant in the complex allele can contribute to the functional activity of the CFTR protein, changing it both in terms of increasing and decreasing function. The role of complex alleles is often underestimated, and their frequency has not been studied. At the moment, characteristic frequently encountered complex alleles have been found for several populations of patients with cystic fibrosis, but the prevalence and pathogenicity of newly detected complex alleles require additional research. In this review, more than 35 complex alleles of the CFTR gene from existing research studies were analyzed, and an analysis of their influence on the manifestations of the disease and the effectiveness of CFTR modulators was also described.
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Affiliation(s)
| | - Anna Efremova
- Research Centre for Medical Genetics, Moscow 115522, Russia; (M.K.); (A.B.); (E.Z.); (T.B.); (Y.M.); (D.G.); (E.K.)
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Teper A, Lubovich S, Rodríguez V, Zaragoza S, Rodríguez E, Bournissen FG. Real-life experience with a generic formulation of lumacaftor-ivacaftor in patients with cystic fibrosis homozygous for the Phe508del CFTR mutation. Pediatr Pulmonol 2023; 58:3560-3565. [PMID: 37712606 DOI: 10.1002/ppul.26690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 08/11/2023] [Accepted: 09/05/2023] [Indexed: 09/16/2023]
Abstract
INTRODUCTION Cystic fibrosis (CF) is the most frequent recessive autosomal disorder in the Caucasian population. It is caused by mutations that result in a deficient or dysfunctional cystic fibrosis transmembrane conductance regulator (CFTR) protein activity. Among CFTR modulators, potentiator compounds increase channel opening, whereas corrector compounds increase CFTR quantity in the cell surface. OBJECTIVE To report real-life effects of a generic formulation of lumacaftor-ivacaftor use in patients with CF homozygous for the Phe508del CFTR mutation. PATIENTS AND METHODS Clinical variables (body mass index [BMI], pulmonary exacerbations, sweat test, and pulmonary function) were analyzed in 30 CF patients homozygous for the Phe508del CFTR mutation, treated with lumacaftor-ivacaftor for 12 months, at the Respiratory Center of Hospital de Niños Ricardo Gutiérrez. These clinical variables were compared with those before the use of modulators. RESULTS A total of 30 patients with CF homozygous for the Phe508del CFTR mutation receiving lumacaftor-ivacaftor therapy were included in this study. The median (interquartile range [IQR]) age at the start of treatment was 10.79 (7.08-14.05) years. Nineteen patients were male. Before treatment, median (IQR) sweat chloride concentration was 80 (72-92) mEq/L, and it had decreased to 74 (68-78) mEq/L (p = .05) 12 months after treatment. Median (IQR) BMI z-score improved from -0.33 (-0.86 to 0.21) to -0.13 (-0.66 to 0.54) (p = .003). A spirometry was performed in 28 of 30 patients. Median (IQR) ppFEV1 was 83.5 (71-91) before treatment and 86.5 (67-103) after treatment (p = .38), 73.3% of patients referred decreased sputum production and 40% reported improvement in their dyspnea at 12 months. Severe pulmonary exacerbations significantly decreased from 60% in the year before treatment, to 30% at 12 months after treatment (p = .037); 13 patients showed an improvement in their exacerbation rates, 2 showed an increased rate, and 15 showed no change. CONCLUSIONS The use of a generic formulation of lumacaftor-ivacaftor in patients homozygous for the Phe508del CFTR mutation was associated with improvement in nutritional status and respiratory symptoms, and a significant reduction in severe pulmonary exacerbations.
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Affiliation(s)
- Alejandro Teper
- Division of Respiratory, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, Argentina
| | - Silvina Lubovich
- Division of Respiratory, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, Argentina
| | - Viviana Rodríguez
- Division of Respiratory, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, Argentina
| | - Silvina Zaragoza
- Division of Respiratory, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, Argentina
| | - Ezequiel Rodríguez
- Division of Respiratory, Hospital de Niños Ricardo Gutiérrez, Ciudad de Buenos Aires, Argentina
| | - Facundo García Bournissen
- Department of Paediatrics, Schulich School of Medicine and Dentistry Western University, London, Ontario, Canada
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Pócsi M, Fejes Z, Bene Z, Nagy A, Balogh I, Amaral MD, Macek M, Nagy B. Human epididymis protein 4 (HE4) plasma concentration inversely correlates with the improvement of cystic fibrosis lung disease in p.Phe508del-CFTR homozygous cases treated with the CFTR modulator lumacaftor/ivacaftor combination. J Cyst Fibros 2023; 22:1085-1092. [PMID: 37087300 DOI: 10.1016/j.jcf.2023.04.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/30/2023] [Accepted: 04/06/2023] [Indexed: 04/24/2023]
Abstract
BACKGROUND We previously documented that elevated HE4 plasma concentration decreased in people with CF (pwCF) bearing the p.Gly551Asp-CFTR variant in response to CFTR modulator (CFTRm) ivacaftor (IVA), and this level was inversely correlated with the FEV1% predicted values (ppFEV1). Although the effectiveness of lumacaftor (LUM)/IVA in pwCF homozygous for the p.Phe508del-CFTR variant has been evaluated, plasma biomarkers were not used to monitor treatment efficacy thus far. METHODS Plasma HE4 concentration was examined in 68 pwCF drawn from the PROSPECT study who were homozygous for the p.Phe508del-CFTR variant before treatment and at 1, 3, 6 and 12 months after administration of LUM/IVA therapy. Plasma HE4 was correlated with ppFEV1 using their absolute and delta values. The discriminatory power of delta HE4 was evaluated for the detection of lung function improvements based on ROC-AUC analysis and multiple regression test. RESULTS HE4 plasma concentration was significantly reduced below baseline following LUM/IVA administration during the entire study period. The mean change of ppFEV1 was 2.6% (95% CI, 0.6 to 4.5) by 6 months of therapy in this sub-cohort. A significant inverse correlation between delta values of HE4 and ppFEV1 was observed especially in children with CF (r=-0.7053; p<0.0001). Delta HE4 predicted a 2.6% mean change in ppFEV1 (AUC: 0.7898 [95% CI 0.6823-0.8972]; P < 0.0001) at a cut-off value of -10.7 pmol/L. Moreover, delta HE4 independently represented the likelihood of being a responder with ≥ 5% delta ppFEV1 at 6 months (OR: 0.89, 95% CI: 0.82-0.95; P = 0.001). CONCLUSIONS Plasma HE4 level negatively correlates with lung function improvement assessed by ppFEV1 in pwCF undergoing LUM/IVA CFTRm treatment.
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Affiliation(s)
- Marianna Pócsi
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Laki Kálmán Doctoral School, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zsolt Fejes
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Zsolt Bene
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Attila Nagy
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - István Balogh
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; Division of Clinical Genetics, Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Margarida D Amaral
- BioISI - Biosystems & Integrative Sciences Institute, Faculty of Sciences, University of Lisboa, Lisboa, Portugal
| | - Milan Macek
- Department of Biology and Medical Genetics, 2nd Faculty of Medicine of Charles University and Motol University Hospital, Prague, Czech Republic
| | - Béla Nagy
- Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.
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Bentley S, Cheong J, Gudka N, Makhecha S, Hadjisymeou-Andreou S, Standing JF. Therapeutic drug monitoring-guided dosing for pediatric cystic fibrosis patients: recent advances and future outlooks. Expert Rev Clin Pharmacol 2023; 16:715-726. [PMID: 37470695 DOI: 10.1080/17512433.2023.2238597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 07/10/2023] [Accepted: 07/17/2023] [Indexed: 07/21/2023]
Abstract
INTRODUCTION Medicine use in children with cystic fibrosis (CF) is complicated by inconsistent pharmacokinetics at variance with the general population, a lack of research into this and its effects on clinical outcomes. In the absence of established dose regimens, therapeutic drug monitoring (TDM) is a clinically relevant tool to optimize drug exposure and maximize therapeutic effect by the bedside. In clinical practice though, use of this is variable and limited by a lack of expert recommendations. AREAS COVERED We aimed to review the use of TDM in children with CF to summarize recent developments, current recommendations, and opportunities for future directions. We searched PubMed for relevant publications using the broad search terms "cystic fibrosis" in combination with the specific terms "therapeutic drug monitoring (TDM)" and "children." Further searches were undertaken using the name of identified drugs combined with the term "TDM." EXPERT OPINION Further research into the use of Bayesian forecasting and the relationship between exposure and response is required to personalize dosing, with the opportunity for the development of expert recommendations in children with CF. Use of noninvasive methods of TDM has the potential to improve accessibility to TDM in this cohort.
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Affiliation(s)
- Siân Bentley
- Pharmacy Department, Royal Brompton Hospital, London, UK
| | - Jamie Cheong
- Pharmacy Department, Royal Brompton Hospital, London, UK
| | - Nikesh Gudka
- Pharmacy Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | | | | | - Joseph F Standing
- Pharmacy Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
- Infection, Immunity and Inflammation,great Ormond Street Institute of Child Health, University College London, London, UK
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Affiliation(s)
- Malina Barillaro
- Department of Physiology, University of Toronto, Toronto ON, Canada
- Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Tanja Gonska
- Translational Medicine, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
- Department of Pediatrics, Division of Gastroenterology, Hepatology and Nutrition, University of Toronto, Toronto ON, Canada
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Enaud R, Lussac-Sorton F, Charpentier E, Velo-Suárez L, Guiraud J, Bui S, Fayon M, Schaeverbeke T, Nikolski M, Burgel PR, Héry-Arnaud G, Delhaes L. Effects of Lumacaftor-Ivacaftor on Airway Microbiota-Mycobiota and Inflammation in Patients with Cystic Fibrosis Appear To Be Linked to Pseudomonas aeruginosa Chronic Colonization. Microbiol Spectr 2023:e0225122. [PMID: 36971560 PMCID: PMC10100832 DOI: 10.1128/spectrum.02251-22] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
The management of cystic fibrosis has been transformed recently by the advent of CFTR modulators, including lumacaftor-ivacaftor. However, the effects of such therapies on the airway ecosystem, particularly on the microbiota-mycobiota and local inflammation, which are involved in the evolution of pulmonary damage, are unclear.
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Kleinfelder K, Somenza E, Farinazzo A, Conti J, Lotti V, Latorre RV, Rodella L, Massella A, Tomba F, Bertini M, Sorio C, Melotti P. CFTR Modulators Rescue the Activity of CFTR in Colonoids Expressing the Complex Allele p.[R74W;V201M;D1270N]/dele22_24. Int J Mol Sci 2023; 24:ijms24065199. [PMID: 36982273 PMCID: PMC10048957 DOI: 10.3390/ijms24065199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 03/11/2023] Open
Abstract
An Italian, 46-year-old female patient carrying the complex allele p.[R74W;V201M;D1270N] in trans with CFTR dele22_24 was diagnosed at the Cystic Fibrosis (CF) Center of Verona as being affected by CF-pancreatic sufficient (CF-PS) in 2021. The variant V201M has unknown significance, while both of the other variants of this complex allele have variable clinical consequences, according to the CFTR2 database, with reported clinical benefits for treatment with ivacaftor + tezacaftor and ivacaftor + tezacaftor + elexacaftor in patients carrying the R74W-D1270N complex allele, which are currently approved (in USA, not yet in Italy). She was previously followed up by pneumologists in northern Italy because of frequent bronchitis, hemoptysis, recurrent rhinitis, Pseudomonas aeruginosa lung colonization, bronchiectasis/atelectasis, bronchial arterial embolization and moderately compromised lung function (FEV1: 62%). Following a sweat test with borderline results, she was referred to the Verona CF Center where she presented abnormal values in both optical beta-adrenergic sweat tests and intestinal current measurement (ICM). These results were consistent with a diagnosis of CF. CFTR function analyses were also performed in vitro by forskolin-induced swelling (FIS) assay and short-circuit currents (Isc) in the monolayers of the rectal organoids. Both of these assays showed significantly increased CFTR activity following treatment with the CFTR modulators. Western-blot analysis revealed increased fully glycosylated CFTR protein after treatment with correctors, in line with the functional analysis. Interestingly, tezacaftor, together with elexacaftor, rescued the total organoid area under steady-state conditions, even in the absence of the CFTR agonist forskolin. In conclusion, in ex vivo and in vitro assays, we measured a residual function that was significantly enhanced by in vitro incubation with CFTR modulators, especially by ivacaftor + tezacaftor + elexacaftor, suggesting this combination as a potentially optimal treatment for this case.
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Affiliation(s)
- Karina Kleinfelder
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Elena Somenza
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Alessia Farinazzo
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Jessica Conti
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Virginia Lotti
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Roberta Valeria Latorre
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
| | - Luca Rodella
- Endoscopic Surgery Unit, Azienda Ospedaliera Universitaria Integrata Verona, 37126 Verona, Italy
| | - Arianna Massella
- Endoscopic Surgery Unit, Azienda Ospedaliera Universitaria Integrata Verona, 37126 Verona, Italy
| | - Francesco Tomba
- Endoscopic Surgery Unit, Azienda Ospedaliera Universitaria Integrata Verona, 37126 Verona, Italy
| | - Marina Bertini
- Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata Verona, Piazzale Stefani, 1, 37126 Verona, Italy
| | - Claudio Sorio
- Department of Medicine, Division of General Pathology, University of Verona, Strada Le Grazie 8, 37134 Verona, Italy
- Correspondence: (C.S.); (P.M.)
| | - Paola Melotti
- Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata Verona, Piazzale Stefani, 1, 37126 Verona, Italy
- Correspondence: (C.S.); (P.M.)
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9
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Athanazio RA, Tanni SE, Ferreira J, Dalcin PDTR, Fuccio MBD, Esposito C, Canan MGM, Coelho LS, Firmida MDC, Almeida MBD, Marostica PJC, Monte LDFV, Souza EL, Pinto LA, Rached SZ, Oliveira VSBD, Riedi CA, Silva Filho LVRFD. Brazilian guidelines for the pharmacological treatment of the pulmonary symptoms of cystic fibrosis. Official document of the Sociedade Brasileira de Pneumologia e Tisiologia (SBPT, Brazilian Thoracic Association). J Bras Pneumol 2023; 49:e20230040. [PMID: 37194817 DOI: 10.36416/1806-3756/e20230040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 03/31/2023] [Indexed: 05/18/2023] Open
Abstract
Cystic fibrosis (CF) is a genetic disease that results in dysfunction of the CF transmembrane conductance regulator (CFTR) protein, which is a chloride and bicarbonate channel expressed in the apical portion of epithelial cells of various organs. Dysfunction of that protein results in diverse clinical manifestations, primarily involving the respiratory and gastrointestinal systems, impairing quality of life and reducing life expectancy. Although CF is still an incurable pathology, the therapeutic and prognostic perspectives are now totally different and much more favorable. The purpose of these guidelines is to define evidence-based recommendations regarding the use of pharmacological agents in the treatment of the pulmonary symptoms of CF in Brazil. Questions in the Patients of interest, Intervention to be studied, Comparison of interventions, and Outcome of interest (PICO) format were employed to address aspects related to the use of modulators of this protein (ivacaftor, lumacaftor+ivacaftor, and tezacaftor+ivacaftor), use of dornase alfa, eradication therapy and chronic suppression of Pseudomonas aeruginosa, and eradication of methicillin-resistant Staphylococcus aureus and Burkholderia cepacia complex. To formulate the PICO questions, a group of Brazilian specialists was assembled and a systematic review was carried out on the themes, with meta-analysis when applicable. The results obtained were analyzed in terms of the strength of the evidence compiled, the recommendations being devised by employing the GRADE approach. We believe that these guidelines represent a major advance to be incorporated into the approach to patients with CF, mainly aiming to favor the management of the disease, and could become an auxiliary tool in the definition of public policies related to CF.
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Affiliation(s)
- Rodrigo Abensur Athanazio
- . Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | - Suzana Erico Tanni
- . Faculdade de Medicina de Botucatu, Universidade Estadual Paulista Julio de Mesquita Filho - UNESP - Botucatu (SP) Brasil
| | - Juliana Ferreira
- . Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | - Paulo de Tarso Roth Dalcin
- . Programa de Pós-Graduação em Ciências Pneumológicas, Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre (RS) Brasil
- . Serviço de Pneumologia, Hospital de Clínicas de Porto Alegre - HCPA - Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre (RS) Brasil
| | - Marcelo B de Fuccio
- . Hospital Júlia Kubitschek, Fundação Hospitalar do Estado de Minas Gerais - FHEMIG - Belo Horizonte (MG) Brasil
| | | | | | - Liana Sousa Coelho
- . Faculdade de Medicina de Botucatu, Universidade Estadual Paulista Julio de Mesquita Filho - UNESP - Botucatu (SP) Brasil
| | | | - Marina Buarque de Almeida
- . Unidade de Pneumologia, Instituto da Criança, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | - Paulo José Cauduro Marostica
- . Unidade de Pneumologia Infantil, Hospital de Clínicas de Porto Alegre - HCPA - Universidade Federal do Rio Grande do Sul - UFRGS - Porto Alegre (RS) Brasil
| | | | - Edna Lúcia Souza
- . Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador (BA) Brasil
| | | | - Samia Zahi Rached
- . Divisão de Pneumologia, Instituto do Coração, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo (SP) Brasil
| | - Verônica Stasiak Bednarczuk de Oliveira
- . Hospital de Clínicas, Universidade Federal do Paraná, Curitiba (PR) Brasil
- . Unidos Pela Vida - Instituto Brasileiro de Atenção à Fibrose Cística, Curitiba (PR) Brasil
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Mitropoulou G, Brandenberg N, Hoehnel S, Ceroni C, Balmpouzis Z, Blanchon S, Dorta G, Sauty A, Koutsokera A. Rectal organoid-guided CFTR modulator therapy restores lung function in a cystic fibrosis patient with the rare 1677delTA/R334W genotype. Eur Respir J 2022; 60:2201341. [PMID: 36423906 DOI: 10.1183/13993003.01341-2022] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/31/2022] [Indexed: 11/25/2022]
Affiliation(s)
- Georgia Mitropoulou
- Adult Cystic Fibrosis and CFTR-related disorders Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- Lung Transplant Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Nathalie Brandenberg
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences, Swiss Federal Institute of Technology, Lausanne, Switzerland
- SUN bioscience, EPFL Innovation Park, Lausanne, Switzerland
| | - Sylke Hoehnel
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences, Swiss Federal Institute of Technology, Lausanne, Switzerland
- SUN bioscience, EPFL Innovation Park, Lausanne, Switzerland
| | - Camilla Ceroni
- Laboratory of Stem Cell Bioengineering, Institute of Bioengineering, School of Life Sciences, Swiss Federal Institute of Technology, Lausanne, Switzerland
- SUN bioscience, EPFL Innovation Park, Lausanne, Switzerland
| | - Zisis Balmpouzis
- Adult Cystic Fibrosis and CFTR-related disorders Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- Lung Transplant Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Sylvain Blanchon
- Paediatric Pulmonology and Cystic Fibrosis Unit, Division of Paediatrics, Dept Woman-Mother-Child, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Gian Dorta
- Division of Gastro-enterology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Alain Sauty
- Adult Cystic Fibrosis and CFTR-related disorders Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- Division of Pulmonology, Dept of Medicine, Neuchâtel Hospital Network, Neuchâtel, Switzerland
- These authors contributed equally
| | - Angela Koutsokera
- Adult Cystic Fibrosis and CFTR-related disorders Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- Lung Transplant Center, Division of Pulmonology, Dept of Medicine, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
- These authors contributed equally
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11
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Cornet M, Robin G, Ciciriello F, Bihouee T, Marguet C, Roy V, Lebourgeois M, Chedevergne F, Bonnel AS, Kelly M, Reix P, Lucidi V, Stoven V, Sermet-Gaudelus I. Profiling the response to lumacaftor-ivacaftor in children with cystic between fibrosis and new insight from a French-Italian real-life cohort. Pediatr Pulmonol 2022; 57:2992-2999. [PMID: 35996214 PMCID: PMC9826158 DOI: 10.1002/ppul.26123] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 08/11/2022] [Accepted: 08/21/2022] [Indexed: 01/11/2023]
Abstract
INTRODUCTION Clinical trials for CFTR modulators consider mean changes of clinical status at the cohort level, and thus fail to assess the heterogeneity of the response. We aimed to study the different response profiles to lumacaftor-ivacaftor according to age in children with cystic fibrosis (CF). METHODS A mathematical framework, including principal component analysis, data clustering, and data completion, was applied to a multicenter cohort of 112 children aged 6-18 years, treated with lumacaftor-ivacaftor. Studied parameters at baseline and 6 months included body mass index (BMI), number of days of antibiotics (ATB), Sweat test (ST), forced expiratory volume in 1 s expressed in percentage predicted (ppFEV1 ), forced vital capacity (ppFVC), and forced expiratory flow at 25%-75% of FVC (ppFEF25-75 ). RESULTS Change in ppFEV1 was the most significant parameter in characterizing response heterogeneity among the 12-18-year-old patients. Patients with minimal changes in ppFEV1 were further separated by change in BMI and ATB course. In the 6-12-year-old children both BMI and ppFEV1 evolution were the most relevant. ST change was not associated with a clinical response. CONCLUSIONS Change in ppFEV1 , BMI, and ATB course are the most relevant outcomes to discriminate clinical response profiles in children treated with lumacaftor-ivacaftor. Prepubertal and pubertal children display different response profiles.
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Affiliation(s)
| | - Geneviève Robin
- Laboratoire de Mathematiques et Modelisation d'Evry, Evry, France
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12
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Kondratyeva E, Bulatenko N, Melyanovskaya Y, Efremova A, Zhekaite E, Sherman V, Voronkova A, Asherova I, Polyakov A, Adyan T, Kovalskaia V, Bukharova T, Goldshtein D, Kutsev S. Personalized Selection of a CFTR Modulator for a Patient with a Complex Allele [L467F;F508del]. Curr Issues Mol Biol 2022; 44:5126-38. [PMID: 36286063 DOI: 10.3390/cimb44100349] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 10/16/2022] [Accepted: 10/18/2022] [Indexed: 11/17/2022] Open
Abstract
The presence of complex alleles in the CFTR gene can lead to difficulties in diagnosing cystic fibrosis and cause resistance to therapy with CFTR modulators. Tezacaftor/ivacaftor therapy for 8 months in a patient with the initially established F508del/F508del genotype did not lead to an improvement in her condition—there was no change in spirometry and an increase in the patient’s weight, while there was only a slight decrease in NaCl values, measured by a sweat test. The intestinal current measurements of the patient’s rectal biopsy showed no positive dynamics in the rescue of CFTR function while taking tezacaftor/ivacaftor. The assumption that the patient had an additional mutation in the cis position was confirmed by sequencing the CFTR gene, and the complex allele [L467F;F508del] was identified. Based on the rescue of CFTR function by elexacaftor/tezacaftor/ivacaftor obtained using forskolin-induced swelling on intestinal organoids, the patient was prescribed therapy with this targeted drug. The use of elexacaftor/tezacaftor/ivacaftor for 7 months resulted in a significant improvement in the patient’s clinical condition.
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13
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Sermet-Gaudelus I, Girodon E, Vermeulen F, Solomon G, Melotti P, Graeber S, Bronsveld I, Rowe S, Wilschanski M, Tümmler B, Cutting G, Gonska T. ECFS standards of care on CFTR-related disorders: Diagnostic criteria of CFTR dysfunction. J Cyst Fibros 2022; 21:922-936. [DOI: 10.1016/j.jcf.2022.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 09/06/2022] [Accepted: 09/14/2022] [Indexed: 11/06/2022]
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14
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Kondratyeva E, Efremova A, Melyanovskaya Y, Voronkova A, Polyakov A, Bulatenko N, Adyan T, Sherman V, Kovalskaia V, Petrova N, Starinova M, Bukharova T, Kutsev S, Goldshtein D. Evaluation of the Complex p.[Leu467Phe;Phe508del] CFTR Allele in the Intestinal Organoids Model: Implications for Therapy. Int J Mol Sci 2022; 23:10377. [PMID: 36142302 PMCID: PMC9499621 DOI: 10.3390/ijms231810377] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 09/03/2022] [Accepted: 09/06/2022] [Indexed: 11/18/2022] Open
Abstract
In the cohort of Russian patients with cystic fibrosis, the p.[Leu467Phe;Phe508del] complex allele (legacy name [L467F;F508del]) of the CFTR gene is understudied. In this research, we present the results of frequency evaluation of the [L467F;F508del] complex allele in the Russian Federation among patients with a F508del/F508del genotype, its effect on the clinical course of cystic fibrosis, the intestinal epithelium ionic channel function, and the effectiveness of target therapy. The frequency of the [L467F;F508del] complex allele among patients with homozygous F508del was determined with multiplex ligase-dependent probe amplification followed by polymerase chain reaction and fragment analysis. The function of ionic channels, including the residual CFTR function, and the effectiveness of CFTR modulators was analyzed using intestinal current measurements on rectal biopsy samples and the forskolin-induced swelling assay on organoids. The results showed that the F508del/[L467F;F508del] genotype is present in 8.2% of all Russian patients with F508del in a homozygous state. The clinical course of the disease in patients with the F508del/[L467F;F508del] genotype is severe and does not vary from the course in the cohort with homozygous F508del, although the CFTR channel function is significantly lower. For patients with the F508del/[L467F;F508del] genotype, we can recommend targeted therapy using a combined ivacaftor + tezacaftor + elexacaftor medication.
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15
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Silva IAL, Laselva O, Lopes-pacheco M. Advances in Preclinical In Vitro Models for the Translation of Precision Medicine for Cystic Fibrosis. J Pers Med 2022; 12:1321. [PMID: 36013270 PMCID: PMC9409685 DOI: 10.3390/jpm12081321] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/19/2022] Open
Abstract
The development of preclinical in vitro models has provided significant progress to the studies of cystic fibrosis (CF), a frequently fatal monogenic disease caused by mutations in the gene encoding the CF transmembrane conductance regulator (CFTR) protein. Numerous cell lines were generated over the last 30 years and they have been instrumental not only in enhancing the understanding of CF pathological mechanisms but also in developing therapies targeting the underlying defects in CFTR mutations with further validation in patient-derived samples. Furthermore, recent advances toward precision medicine in CF have been made possible by optimizing protocols and establishing novel assays using human bronchial, nasal and rectal tissues, and by progressing from two-dimensional monocultures to more complex three-dimensional culture platforms. These models also enable to potentially predict clinical efficacy and responsiveness to CFTR modulator therapies at an individual level. In parallel, advanced systems, such as induced pluripotent stem cells and organ-on-a-chip, continue to be developed in order to more closely recapitulate human physiology for disease modeling and drug testing. In this review, we have highlighted novel and optimized cell models that are being used in CF research to develop novel CFTR-directed therapies (or alternative therapeutic interventions) and to expand the usage of existing modulator drugs to common and rare CF-causing mutations.
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16
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Choong E, Sauty A, Koutsokera A, Blanchon S, André P, Decosterd L. Therapeutic Drug Monitoring of Ivacaftor, Lumacaftor, Tezacaftor, and Elexacaftor in Cystic Fibrosis: Where Are We Now? Pharmaceutics 2022; 14:1674. [PMID: 36015300 PMCID: PMC9412421 DOI: 10.3390/pharmaceutics14081674] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/20/2022] [Accepted: 07/23/2022] [Indexed: 11/16/2022] Open
Abstract
Drugs modulating the cystic fibrosis transmembrane conductance regulator (CFTR) protein, namely ivacaftor, lumacaftor, tezacaftor, and elexacaftor, are currently revolutionizing the management of patients with cystic fibrosis (CF), particularly those with at least one F508del variant (up to 85% of patients). These “caftor” drugs are mainly metabolized by cytochromes P450 3A, whose enzymatic activity is influenced by environmental factors, and are sensitive to inhibition and induction. Hence, CFTR modulators are characterized by an important interindividual pharmacokinetic variability and are also prone to drug–drug interactions. However, these CFTR modulators are given at standardized dosages, while they meet all criteria for a formal therapeutic drug monitoring (TDM) program that should be considered in cases of clinical toxicity, less-than-expected clinical response, drug or food interactions, distinct patient subgroups (i.e., pediatrics), and for monitoring short-term adherence. While the information on CFTR drug exposure–clinical response relationships is still limited, we review the current evidence of the potential interest in the TDM of caftor drugs in real-life settings.
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17
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Nguyen-Khoa T, Hatton A, Drummond D, Aoust L, Schlatter J, Martin C, Ramel S, Kiefer S, Gachelin E, Stremler N, Cosson L, Gabsi A, Remus N, Benhamida M, Hadchouel A, Fajac I, Munck A, Girodon E, Sermet-Gaudelus I. Reclassifying inconclusive diagnosis for Cystic Fibrosis with new generation sweat test. Eur Respir J 2022; 60:13993003.00209-2022. [PMID: 35777769 DOI: 10.1183/13993003.00209-2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/19/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Thao Nguyen-Khoa
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France.,Université de Paris, Paris, France.,Laboratoires de Biochimie & du Centre Régional de Dépistage Néonatal- Ile-de-France, Hôpital Necker-Enfants Malades, Paris, France.,Centre de Référence Maladies Rares, Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, Paris, France
| | - Aurélie Hatton
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France
| | - David Drummond
- Centre de Référence Maladies Rares, Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, Paris, France.,Service de Pneumo-Allergologie Pédiatrique, Hôpital Necker-Enfants Malades, Paris, France
| | - Laura Aoust
- Centre de Référence Maladies Rares, Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, Paris, France.,Service de Pneumo-Allergologie Pédiatrique, Hôpital Necker-Enfants Malades, Paris, France
| | - Joël Schlatter
- Pharmacie Clinique, Hôpital Necker-Enfants Malades, Paris, France
| | - Clémence Martin
- Centre de Ressource et de Compétence de la Mucoviscidose (CRCM), Explorations-Fonctionnelles, Hôpital Cochin, Paris, France
| | - Sophie Ramel
- CRCM, Hôpital Hélio Marin, Fondation Ildys, Roscoff, France
| | - Sébastien Kiefer
- CRCM Pédiatrique, Hôpital de Mercy, Centre Hospitalier Régional Universitaire, Nancy, France
| | - Elsa Gachelin
- Service de Pédiatrie, Hôpital Félix-Guyon, Centre Hospitalier Universitaire, Saint Denis, France
| | | | | | - Asma Gabsi
- CRCM, Hôpital André Mignot, Le Chesnay, France
| | - Natascha Remus
- CRCM, Hôpital Inter-Communal de Créteil, Créteil, France
| | - Myriam Benhamida
- CRCM, Centre Hospitalier Universitaire de Nantes, Nantes, France
| | - Alice Hadchouel
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France.,Université de Paris, Paris, France.,Centre de Référence Maladies Rares, Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, Paris, France.,Service de Pneumo-Allergologie Pédiatrique, Hôpital Necker-Enfants Malades, Paris, France
| | - Isabelle Fajac
- Université de Paris, Paris, France.,Centre de Ressource et de Compétence de la Mucoviscidose (CRCM), Explorations-Fonctionnelles, Hôpital Cochin, Paris, France
| | - Anne Munck
- Laboratoires de Biochimie & du Centre Régional de Dépistage Néonatal- Ile-de-France, Hôpital Necker-Enfants Malades, Paris, France
| | - Emmanuelle Girodon
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France.,Université de Paris, Paris, France.,Service de Médecine Génomique des Maladies de Système et d'Organe, Hôpital Cochin, Paris, France
| | - Isabelle Sermet-Gaudelus
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France .,Université de Paris, Paris, France.,Centre de Référence Maladies Rares, Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, Paris, France.,Service de Pneumo-Allergologie Pédiatrique, Hôpital Necker-Enfants Malades, Paris, France
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18
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Regard L, Martin C, Burnet E, Da Silva J, Burgel PR. CFTR Modulators in People with Cystic Fibrosis: Real-World Evidence in France. Cells 2022; 11:cells11111769. [PMID: 35681464 PMCID: PMC9179538 DOI: 10.3390/cells11111769] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/15/2022] [Accepted: 05/23/2022] [Indexed: 01/18/2023] Open
Abstract
Cystic fibrosis (CF) is a rare genetic multisystemic disease, the manifestations of which are due to mutations in the gene encoding the CF transmembrane conductance regulator (CFTR) protein and can lead to respiratory insufficiency and premature death. CFTR modulators, which were developed in the past decade, partially restore CFTR protein function. Their clinical efficacy has been demonstrated in phase 3 clinical trials, particularly in terms of lung function and pulmonary exacerbations, nutritional status, and quality of life in people with gating mutations (ivacaftor), homozygous for the F508del mutation (lumacaftor/ivacaftor and tezacaftor/ivacaftor), and in those with at least one F508del mutation (elexacaftor/tezacaftor/ivacaftor). However, many questions remain regarding their long-term safety and effectiveness, particularly in patients with advanced lung disease, liver disease, renal insufficiency, or problematic bacterial colonization. The impact of CFTR modulators on other important outcomes such as concurrent treatments, lung transplantation, chest imaging, or pregnancies also warrants further investigation. The French CF Reference Network includes 47 CF centers that contribute patient data to the comprehensive French CF Registry and have conducted nationwide real-world studies on CFTR modulators. This review seeks to summarize the results of these real-world studies and examine their findings against those of randomized control trials.
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Affiliation(s)
- Lucile Regard
- French Cystic Fibrosis National Reference Center, Department of Respiratory Medicine, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France; (L.R.); (C.M.); (E.B.); (J.D.S.)
- Institut Cochin, Université de Paris Cité, INSERM U1016, 75014 Paris, France
- ERN Lung Cystic Fibrosis Network, Frankfurt, Germany
| | - Clémence Martin
- French Cystic Fibrosis National Reference Center, Department of Respiratory Medicine, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France; (L.R.); (C.M.); (E.B.); (J.D.S.)
- Institut Cochin, Université de Paris Cité, INSERM U1016, 75014 Paris, France
- ERN Lung Cystic Fibrosis Network, Frankfurt, Germany
| | - Espérie Burnet
- French Cystic Fibrosis National Reference Center, Department of Respiratory Medicine, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France; (L.R.); (C.M.); (E.B.); (J.D.S.)
- Institut Cochin, Université de Paris Cité, INSERM U1016, 75014 Paris, France
- ERN Lung Cystic Fibrosis Network, Frankfurt, Germany
| | - Jennifer Da Silva
- French Cystic Fibrosis National Reference Center, Department of Respiratory Medicine, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France; (L.R.); (C.M.); (E.B.); (J.D.S.)
- ERN Lung Cystic Fibrosis Network, Frankfurt, Germany
| | - Pierre-Régis Burgel
- French Cystic Fibrosis National Reference Center, Department of Respiratory Medicine, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France; (L.R.); (C.M.); (E.B.); (J.D.S.)
- Institut Cochin, Université de Paris Cité, INSERM U1016, 75014 Paris, France
- ERN Lung Cystic Fibrosis Network, Frankfurt, Germany
- Correspondence: ; Tel.: +33-1-58-41-23-67; Fax: +33-1-46-33-82-53
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19
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Petrova NV, Kashirskaya NY, Vasilyeva TA, Balinova NV, Marakhonov AV, Kondratyeva EI, Zhekaite EK, Voronkova AY, Kutsev SI, Zinchenko RA. High frequency of complex CFTR alleles associated with c.1521_1523delCTT (F508del) in Russian cystic fibrosis patients. BMC Genomics 2022; 23:252. [PMID: 35365085 PMCID: PMC8973895 DOI: 10.1186/s12864-022-08466-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 03/08/2022] [Indexed: 11/16/2022] Open
Abstract
Cystic fibrosis (CF, MIM# 219,700) is an autosomal recessive disease caused by pathogenic variants within the CFTR gene. It was shown that genetic variants located in cis can affect disease severity or treatment response because of additive or epistatic effects. Studies on the prevalence of complex alleles in Russian CF patients have just begun. Aim To evaluate frequencies and genetic background of complex alleles carrying c.1521_1523delCTT (F508del) and c.1399C>T (L467F), c.2562T>G (T854=) or c.4389G>A (Q1463=) in cis; to determine clinical consequences of complex allele c.[1399C>T;1521_1523delCTT] ([L467;F508del]) in Russian CF patients. Methods Sequencing of coding regions of CFTR gene and analysis of polymorphic markers in CF patients carrying F508del variant. Comparing of clinical features in two groups patients having genotypes [L467F;F508del];[F508del] (group 1) and [F508del];[F508del] (group 2). Results Frequency of [L467F;F508del] allele linked to 2–2–21–6–17–13 haplotype was 4.42%, of [F508del;T854=;Q1463=] allele linked to haplotype 1–2–21–6–17–13 – 2.2% in F508del chromosomes. No differences in disease severity in patients carrying complex allele [L467F;F508del] and patients homozygous for F508del was found. Conclusion The frequency of complex alleles associated with F508del was at least 6.6% in Russian CF patients, which should be taken into account for the decision on optimal treatment options with CFTR modulators.
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Affiliation(s)
- Nika V Petrova
- Research Centre for Medical Genetics, Moscow, Russian Federation
| | | | | | | | - Andrey V Marakhonov
- Research Centre for Medical Genetics, Moscow, Russian Federation. .,Laboratory of Genetic Epidemiology, Research Centre for Medical Genetics, Moskvorechie St., 1, 115522, Moscow, Russian Federation.
| | | | - Elena K Zhekaite
- Research Centre for Medical Genetics, Moscow, Russian Federation
| | - Anna Y Voronkova
- Research Centre for Medical Genetics, Moscow, Russian Federation
| | - Sergey I Kutsev
- Research Centre for Medical Genetics, Moscow, Russian Federation
| | - Rena A Zinchenko
- Research Centre for Medical Genetics, Moscow, Russian Federation.,N.A. Semashko National Research Institute of Public Health, Moscow, Russian Federation
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20
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Affiliation(s)
- Patrick A Flume
- Editor in Chief, Medical University of South Carolina, Charleston, South Carolina, USA
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21
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Dana J, Debray D, Beaufrère A, Hillaire S, Fabre M, Reinhold C, Baumert TF, Berteloot L, Vilgrain V. Cystic fibrosis-related liver disease: Clinical presentations, diagnostic and monitoring approaches in the era of CFTR modulator therapies. J Hepatol 2022; 76:420-34. [PMID: 34678405 DOI: 10.1016/j.jhep.2021.09.042] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/09/2021] [Accepted: 09/30/2021] [Indexed: 12/11/2022]
Abstract
Cystic fibrosis (CF) is the most common autosomal recessive disease in the Caucasian population. Cystic fibrosis-related liver disease (CFLD) is defined as the pathogenesis related to the underlying CFTR defect in biliary epithelial cells. CFLD needs to be distinguished from other liver manifestations that may not have any pathological significance. The clinical/histological presentation and severity of CFLD vary. The main histological presentation of CFLD is focal biliary fibrosis, which is usually asymptomatic. Portal hypertension develops in a minority of cases (about 10%) and may require specific management including liver transplantation for end-stage liver disease. Portal hypertension is usually the result of the progression of focal biliary fibrosis to multilobular cirrhosis during childhood. Nevertheless, non-cirrhotic portal hypertension as a result of porto-sinusoidal vascular disease is now identified increasingly more frequently, mainly in young adults. To evaluate the effect of new CFTR modulator therapies on the liver, the spectrum of hepatobiliary involvement must first be precisely classified. This paper discusses the phenotypic features of CFLD, its underlying physiopathology and relevant diagnostic and follow-up approaches, with a special focus on imaging.
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22
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Graeber SY, Vitzthum C, Pallenberg ST, Naehrlich L, Stahl M, Rohrbach A, Drescher M, Minso R, Ringshausen FC, Rueckes-Nilges C, Klajda J, Berges J, Yu Y, Scheuermann H, Hirtz S, Sommerburg O, Dittrich AM, Tümmler B, Mall MA. Effects of Elexacaftor/Tezacaftor/Ivacaftor Therapy on CFTR Function in Patients with Cystic Fibrosis and One or Two F508del Alleles. Am J Respir Crit Care Med 2021; 205:540-549. [PMID: 34936849 DOI: 10.1164/rccm.202110-2249oc] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE The CFTR modulator combination elexacaftor/tezacaftor/ivacaftor (ELX/TEZ/IVA) was shown to improve clinical outcomes and sweat chloride concentration (SCC) in patients with cystic fibrosis (CF) and one or two F508del alleles. However, the effect of ELX/TEZ/IVA on CFTR function in the airways and intestine has not been studied. OBJECTIVES To assess the effect of ELX/TEZ/IVA on CFTR function in airway and intestinal epithelia in patients with CF and one or two F508del alleles aged 12 years and older. METHODS This prospective observational multicenter study assessed clinical outcomes including FEV1 %predicted and body mass index, and the CFTR biomarkers SCC, nasal potential difference (NPD) and intestinal current measurement (ICM) before and 8-16 weeks after initiation of ELX/TEZ/IVA. MEASUREMENTS AND MAIN RESULTS A total of 107 patients with CF including 55 patients with one F508del and a minimal function mutation and 52 F508del homozygous patients were enrolled in this study. In patients with one F508del allele, NPD and ICM showed that ELX/TEZ/IVA improved CFTR function in nasal epithelia to a level of 46.5% (IQR, 27.5-72.4; P<0.001) and in intestinal epithelia to 41.8% of normal (IQR, 25.1-57.6; P<0.001). In F508del homozygous patients, ELX/TEZ/IVA exceeded improvement of CFTR function observed with TEZ/IVA and increased CFTR-mediated Cl- secretion to a level of 47.4% of normal (IQR, 19.3-69.2; P<0.001) in nasal and to 45.9% (IQR, 19.7-66.6; P<0.001) in intestinal epithelia. CONCLUSIONS Treatment with ELX/TEZ/IVA results in effective improvement of CFTR function in airway and intestinal epithelia in patients with CF and one or two F508del alleles.
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Affiliation(s)
- Simon Y Graeber
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany.,Berlin Institute of Health, 522475, Berlin, Germany.,German Center for Lung Research, 542891, associated partner, Berlin, Germany
| | - Constanze Vitzthum
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany.,German Center for Lung Research, 542891, associated partner, Berlin, Germany
| | - Sophia T Pallenberg
- Hannover Medical School, 9177, Department of Pediatric Pneumology, Allergology and Neonatology, Hannover, Germany.,German Center for Lung Research, 542891, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover, Germany
| | - Lutz Naehrlich
- Justus-Liebig-University Giessen, Department of Pediatrics, Giessen, Germany.,German Center for Lung Research, 542891, Universities of Giessen and Marburg Lung Center (UGMLC), Giessen, Germany
| | - Mirjam Stahl
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany.,Berlin Institute of Health, 522475, Berlin, Germany.,German Center for Lung Research, 542891, associated partner, Berlin, Germany
| | - Alexander Rohrbach
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany
| | - Marika Drescher
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany.,German Center for Lung Research, 542891, associated partner, Berlin, Germany
| | - Rebecca Minso
- Hannover Medical School, 9177, Department of Pediatric Pneumology, Allergology and Neonatology, Hannover, Germany
| | - Felix C Ringshausen
- Hannover Medical School, 9177, Department of Respiratory Medicine, Hannover, Germany.,German Center for Lung Research, 542891, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover, Germany
| | | | - Jan Klajda
- Justus-Liebig-University Giessen, Department of Pediatrics, Giessen, Germany
| | - Julian Berges
- University of Heidelberg, 9144, Department of Pediatrics, Division of Pediatric Pulmonology and Allergy and Cystic Fibrosis Center, Heidelberg, Germany.,University of Heidelberg, 9144, Department of Translational Pulmonology, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Yin Yu
- University of Heidelberg, 9144, Department of Pediatrics, Division of Pediatric Pulmonology and Allergy and Cystic Fibrosis Center, Heidelberg, Germany.,University of Heidelberg, 9144, German Centre for Lung Research (DZL), Translational Lung Research Center Heidelberg (TLRC), Department of Translational Pulmonology, Heidelberg, Germany
| | - Heike Scheuermann
- University of Heidelberg, 9144, Department of Pediatrics, Division of Pediatric Pulmonology and Allergy and Cystic Fibrosis Center, Heidelberg, Germany.,University of Heidelberg, 9144, Department of Translational Pulmonology, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Stephanie Hirtz
- University of Heidelberg, 9144, Department of Pediatrics, Division of Pediatric Pulmonology and Allergy and Cystic Fibrosis Center, Heidelberg, Germany.,University of Heidelberg, 9144, Department of Translational Pulmonology, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Olaf Sommerburg
- University of Heidelberg, 9144, Department of Pediatrics, Division of Pediatric Pulmonology and Allergy and Cystic Fibrosis Center, Heidelberg, Germany.,University of Heidelberg, 9144, Department of Translational Pulmonology, Translational Lung Research Center Heidelberg (TLRC), German Center for Lung Research (DZL), Heidelberg, Germany
| | - Anna-Maria Dittrich
- Hannover Medical School, 9177, Department of Pediatric Pneumology, Allergology and Neonatology, Hannover, Germany.,German Center for Lung Research, 542891, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover, Germany
| | - Burkhard Tümmler
- Hannover Medical School, 9177, Department of Pediatric Pneumology, Allergology and Neonatology, Hannover, Germany.,German Center for Lung Research, 542891, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover, Germany
| | - Marcus A Mall
- Charité Universitätsmedizin Berlin, 14903, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine and Cystic Fibrosis Center, Berlin, Germany.,Berlin Institute of Health, 522475, Berlin, Germany.,German Center for Lung Research, 542891, associated partner, Berlin, Germany;
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23
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Muilwijk D, Bierlaagh M, van Mourik P, Kraaijkamp J, van der Meer R, van den Bor R, Heijerman H, Eijkemans R, Beekman J, van der Ent K. Prediction of Real-World Long-Term Outcomes of People with CF Homozygous for the F508del Mutation Treated with CFTR Modulators. J Pers Med 2021; 11:jpm11121376. [PMID: 34945848 PMCID: PMC8707616 DOI: 10.3390/jpm11121376] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/06/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
The clinical response to cystic fibrosis transmembrane conductance regulator (CFTR) modulators is variable within people with cystic fibrosis (pwCF) homozygous for the F508del mutation. The prediction of clinical effect in individual patients would be useful to target therapy to those who would benefit from it. A multicenter observational cohort study was conducted including 97 pwCF (F508del/F508del), who started lumacaftor/ivacaftor (LUM/IVA) treatment before June 2018. In order to assess the associations of individual in vivo and in vitro biomarkers with clinical outcomes, we collected clinical data regarding sex, age, and sweat chloride concentration (SwCl) at baseline and after six months of LUM/IVA; the percent predicted forced expiratory volume in 1 s (ppFEV1) and the number of pulmonary exacerbations (PEx) during the three years before up to three years after modulator initiation; and the forskolin-induced swelling (FIS) responses to LUM/IVA, quantified in intestinal organoids. On a group level, the results showed an acute change in ppFEV1 after LUM/IVA initiation (2.34%, 95% CI 0.85–3.82, p = 0.003), but no significant change in annual ppFEV1 decline in the three years after LUM/IVA compared to the three years before (change: 0.11% per year, 95%CI: −1.94–2.19, p = 0.913). Neither of these two outcomes was associated with any of the candidate predictors on an individual level. The median number of pulmonary exacerbations (PEx) per patient year did not significantly change in the three years after LUM/IVA compared to the years before (median: 0.33/patient year, IQR: 0–0.67 before vs. median: 0/patient year, IQR: 0–0.67 after p = 0. 268). The PEx rate after modulator initiation was associated with the PEx rate before (IRR: 2.26, 95%CI: 1.67–3.08, p < 0.001), with sex (males vs. females IRR: 0.36, 95%CI: 0.21–0.63, p = 0.001) and with sweat chloride concentration (SwCl) at baseline (IRR: 0.96, 95%CI: 0.94–0.98, p = 0.001). The change in SwCl was also significant (−22.9 mmol/L (95%CI: −27.1–−18.8, p < 0.001) and was associated with SwCl at baseline (−0.64, 95%CI: −0.90–−0.37, p < 0.001) and with sex (males vs. females 8.32, 95%CI: 1.82–14.82, p = 0.013). In conclusion, ppFEV1 decline after CFTR modulator initiation remains difficult to predict in individual patients in a real-world setting, with limited effectiveness for double CFTR modulator therapies. The PEx rate prior to CFTR modulator treatment initiation, sex and SwCl at baseline could be potential predictors of long-term PEx rate and of changes in SwCl after modulator initiation.
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Affiliation(s)
- Danya Muilwijk
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
| | - Marlou Bierlaagh
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
| | - Peter van Mourik
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
| | - Jasmijn Kraaijkamp
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
| | - Renske van der Meer
- Department of Pulmonology, Haga Teaching Hospital, Els Borst-Eilersplein 275, 2545 CH The Hague, The Netherlands;
| | - Rutger van den Bor
- Department of Data Science and Biostatistics, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, 3584 EA Utrecht, The Netherlands; (R.v.d.B.); (R.E.)
| | - Harry Heijerman
- Department of Pulmonology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands;
| | - René Eijkemans
- Department of Data Science and Biostatistics, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, 3584 EA Utrecht, The Netherlands; (R.v.d.B.); (R.E.)
| | - Jeffrey Beekman
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
- Department of Regenerative Medicine, University Medical Center Utrecht, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
| | - Kors van der Ent
- Department of Pediatric Pulmonology, University Medical Center Utrecht, loc. Wilhelmina Children’s Hospital, Lundlaan 6, 3584 EA Utrecht, The Netherlands; (D.M.); (M.B.); (P.v.M.); (J.K.); (J.B.)
- Correspondence: ; Tel.: +31-88-7553201
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24
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Averna M, Melotti P, Sorio C. Revisiting the Role of Leukocytes in Cystic Fibrosis. Cells 2021; 10:cells10123380. [PMID: 34943888 PMCID: PMC8699441 DOI: 10.3390/cells10123380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/17/2021] [Accepted: 11/29/2021] [Indexed: 11/30/2022] Open
Abstract
Cystic fibrosis in characterized by pulmonary bacterial colonization and hyperinflammation. Lymphocytes, monocytes/macrophages, neutrophils, and dendritic cells of patients with CF express functional CFTR and are directly affected by altered CFTR expression/function, impairing their ability to resolve infections and inflammation. However, the mechanism behind and the contribution of leukocytes in the pathogenesis of CF are still poorly characterized. The recent clinical introduction of specific CFTR modulators added an important tool not only for the clinical management of the disease but also to the investigation of the pathophysiological mechanisms related to CFTR dysfunction and dysregulated immunity. These drugs treat the basic defect in cystic fibrosis (CF) by increasing CFTR function with improvement of lung function and quality of life, and may improve clinical outcomes also by correcting the dysregulated immune function that characterizes CF. Measure of CFTR function, protein expression profiling and several omics methods were used to identify molecular changes in freshly isolated leukocytes of CF patients, highlighting two roles of leukocytes in CF: one more generally related to the mechanism(s) causing immune dysregulation in CF and unresolved inflammation, and another more applicative role, which identifies in myeloid cells, an important tool predictive of the therapeutic response of CF patients. In this review we will summarize available data on CFTR expression and function in leukocyte populations and will discuss potential clinical applications based on available data.
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Affiliation(s)
- Monica Averna
- Department of Experimental Medicine (DIMES), University of Genova, 16132 Genova, Italy;
| | - Paola Melotti
- Cystic Fibrosis Centre, Azienda Ospedaliera Universitaria Integrata Verona, 37126 Verona, Italy;
| | - Claudio Sorio
- Department of Medicine, General Pathology Division, University of Verona, 37134 Verona, Italy
- Correspondence: ; Tel.: +39-045-802-7688
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25
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Baatallah N, Elbahnsi A, Mornon JP, Chevalier B, Pranke I, Servel N, Zelli R, Décout JL, Edelman A, Sermet-Gaudelus I, Callebaut I, Hinzpeter A. Pharmacological chaperones improve intra-domain stability and inter-domain assembly via distinct binding sites to rescue misfolded CFTR. Cell Mol Life Sci 2021; 78:7813-7829. [PMID: 34714360 DOI: 10.1007/s00018-021-03994-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 10/11/2021] [Accepted: 10/15/2021] [Indexed: 12/14/2022]
Abstract
Protein misfolding is involved in a large number of diseases, among which cystic fibrosis. Complex intra- and inter-domain folding defects associated with mutations in the cystic fibrosis transmembrane regulator (CFTR) gene, among which p.Phe508del (F508del), have recently become a therapeutical target. Clinically approved correctors such as VX-809, VX-661, and VX-445, rescue mutant protein. However, their binding sites and mechanisms of action are still incompletely understood. Blind docking onto the 3D structures of both the first membrane-spanning domain (MSD1) and the first nucleotide-binding domain (NBD1), followed by molecular dynamics simulations, revealed the presence of two potential VX-809 corrector binding sites which, when mutated, abrogated rescue. Network of amino acids in the lasso helix 2 and the intracellular loops ICL1 and ICL4 allosterically coupled MSD1 and NBD1. Corrector VX-445 also occupied two potential binding sites on MSD1 and NBD1, the latter being shared with VX-809. Binding of both correctors on MSD1 enhanced the allostery between MSD1 and NBD1, hence the increased efficacy of the corrector combination. These correctors improve both intra-domain folding by stabilizing fragile protein-lipid interfaces and inter-domain assembly via distant allosteric couplings. These results provide novel mechanistic insights into the rescue of misfolded proteins by small molecules.
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Affiliation(s)
- Nesrine Baatallah
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Ahmad Elbahnsi
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005, Paris, France.,Department of Applied Physics of Science for Life Laboratory, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Jean-Paul Mornon
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005, Paris, France
| | - Benoit Chevalier
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Iwona Pranke
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Nathalie Servel
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Renaud Zelli
- Univ. Grenoble Alpes, CNRS, DPM, 38000, Grenoble, France
| | | | - Aleksander Edelman
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Isabelle Sermet-Gaudelus
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France.,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France
| | - Isabelle Callebaut
- Sorbonne Université, Muséum National d'Histoire Naturelle, UMR CNRS 7590, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, IMPMC, 75005, Paris, France.
| | - Alexandre Hinzpeter
- INSERM, U1151, Institut Necker Enfants Malades, INEM, Paris, France. .,CNRS UMR 8253 - Faculté de Médecine, Université de Paris, Paris, France.
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26
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Lauwers E, Belmans D, Mignot B, Ides K, Van Hoorenbeeck K, Snoeckx A, Van Holsbeke C, Nowé V, Van Braeckel E, De Backer W, De Backer J, Verhulst S. The short-term effects of ORKAMBI (lumacaftor/ivacaftor) on regional and distal lung structures using functional respiratory imaging. Ther Adv Respir Dis 2021; 15:17534666211046774. [PMID: 34541955 PMCID: PMC8461124 DOI: 10.1177/17534666211046774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Lumacaftor/ivacaftor (LUM/IVA) has shown modest benefits in previous research, but the exact effects in the cystic fibrosis (CF) lung remain unclear. This study aims to offer novel information on the mode of action of the cystic fibrosis transmembrane conductance regulator (CFTR)-modulating drug by assessing lung structure and function using functional respiratory imaging (FRI). Methods: CF patients aged ⩾12 years homozygous for F508del were recruited in an open-label study. Before and after 12 weeks of treatment with LUM/IVA, FRI was used to visualize regional information, such as air trapping, lobar volume and airway wall volume. Secondary outcomes included the CF-CT scoring system, spirometry, the Cystic Fibrosis Questionnaire–Revised (CFQ-R) questionnaire, exercise tolerance and nutritional status. Results: Of the 12 patients enrolled in the study, 11 completed all study visits. Concerning the FRI parameters, hyperinflation of the lung decreased, indicated by a reduction in air trapping and lobar volume at expiration. Also, a decrease in airway wall volume and a redistribution of pulmonary blood volume were noted, which might be related to a decrease in mucus impaction. Airway resistance, airway volume, internal airflow distribution and aerosol deposition pattern did not show significant changes. No significant improvements were found in any of the CF-CT scores or in the spirometric parameters. Other secondary outcomes showed similar results compared with previous research. Correlations at baseline were found between FRI and conventional outcomes, including physical functioning, spirometry and CF-CT scores. Conclusions: LUM/IVA decreased lung hyperinflation in combination with a potential decrease in mucus impaction, which can be related to an improved mucociliary transport. These results indicate that several FRI parameters, reflecting regional and distal lung structures, are more sensitive to changes caused by LUM/IVA than conventional respiratory outcomes.
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Affiliation(s)
| | | | | | - Kris Ides
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Infla-Med Research Consortium of Excellence, University of Antwerp, Antwerp, Belgium
- Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium
- CoSys Research Lab, Faculty of Applied Engineering, University of Antwerp, Antwerp, Belgium
- Flanders Make Strategic Research Center, Lommel, Belgium
| | - Kim Van Hoorenbeeck
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Infla-Med Research Consortium of Excellence, University of Antwerp, Antwerp, Belgium
- Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium
| | - Annemiek Snoeckx
- Department of Radiology, Antwerp University Hospital, Edegem, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | | | - Vicky Nowé
- Department of Pulmonology, GZA Hospital, Antwerp, Belgium
| | - Eva Van Braeckel
- Department of Respiratory Medicine, Ghent University Hospital, Ghent, Belgium
- Department of Internal Medicine and Pediatrics, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Wilfried De Backer
- FLUIDDA NV, Kontich, Belgium
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | | | - Stijn Verhulst
- Laboratory of Experimental Medicine and Pediatrics, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Infla-Med Research Consortium of Excellence, University of Antwerp, Antwerp, Belgium
- Department of Pediatrics, Antwerp University Hospital, Edegem, Belgium
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27
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Drummond D, Dana J, Berteloot L, Schneider-Futschik EK, Chedevergne F, Bailly-Botuha C, Nguyen-Khoa T, Cornet M, Le Bourgeois M, Debray D, Girard M, Sermet-Gaudelus I. Lumacaftor-ivacaftor effects on cystic fibrosis-related liver involvement in adolescents with homozygous F508 del-CFTR. J Cyst Fibros 2021; 21:212-219. [PMID: 34454846 DOI: 10.1016/j.jcf.2021.07.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 07/24/2021] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND The effects of lumacaftor-ivacaftor on cystic fibrosis transmembrane conductance regulator (CFTR)-associated liver disease remain unclear. The objective of the study was to describe the effect of this treatment on features of liver involvement in a cystic fibrosis (CF) adolescent population homozygous for F508del. METHODS Clinical characteristics, liver blood tests, abdominal ultrasonography (US), and pancreas and liver proton density fat fraction (PDFF) by magnetic resonance imaging, were obtained at treatment initiation and at 12 months for all patients. Biomarkers of CFTR activity (sweat chloride test, nasal potential difference, and intestinal current measurement) were assessed at initiation and at 6 months therapy. RESULTS Of the 37 patients who started ivacaftor/lumacaftor treatment, 28 were eligible for analysis. In this group, before treatment initiation, 4 patients were diagnosed with multinodular liver and portal hypertension, 19 with other forms of CF liver involvement, and 5 with no signs of liver involvement. During treatment, no hepatic adverse reactions were documented, and no patient developed liver failure. Serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST) and gammaglutamyl transferase (GGT) decreased significantly following initiation of lumacaftor-ivacaftor, and remained so after 12 months treatment. This was not correlated with changes in clinical status, liver and pancreas US and PDFF, fecal elastase, or lumacaftor-ivacaftor serum levels. The most "responsive" patients demonstrated a significant increase in biomarkers of CFTR activity. CONCLUSIONS These results may suggest a potential beneficial effect of CFTR modulators on CF liver disease and warrant further investigation in larger, prospective studies.
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Affiliation(s)
- David Drummond
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France; Université de Paris, Paris, France
| | - Jérémy Dana
- Université de Paris, Paris, France; Service d'Imagerie pédiatrique, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France; Université de Strasbourg, Inserm U1110, Institut de Recherche sur les Maladies Virales et Hépatiques, Strasbourg, France; Institut Hospitalo-Universitaire, Strasbourg, France
| | - Laureline Berteloot
- Service d'Imagerie pédiatrique, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Elena K Schneider-Futschik
- Department of Pharmacology & Therapeutics, Lung Health Research Centre, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Australia; Laboratoire de Biochimie, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Frédérique Chedevergne
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Céline Bailly-Botuha
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Thao Nguyen-Khoa
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France; Laboratoire de Biochimie, Hôpital Necker-Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Mathieu Cornet
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France; Université de Paris, Paris, France; INSERM U1151, Institut Necker Enfants Malades, Paris, France
| | - Muriel Le Bourgeois
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Dominique Debray
- Université de Paris, Paris, France; Unité d'Hépatologie pédiatrique, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Muriel Girard
- Université de Paris, Paris, France; Department of Pharmacology & Therapeutics, Lung Health Research Centre, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Australia; Unité d'Hépatologie pédiatrique, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France
| | - Isabelle Sermet-Gaudelus
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladies Rares Mucoviscidose et Maladies apparentées, Centre de Ressources et de Compétences pour la Mucoviscidose, Hôpital Necker Enfants Malades, Assistance Publique-Hôpitaux de Paris (AP-HP)-Centre, Université de Paris, Paris, France; Université de Paris, Paris, France; Department of Pharmacology & Therapeutics, Lung Health Research Centre, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Australia; Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine (CRSA), Institute of Cardiometabolism and Nutrition (ICAN), Paris, France.
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Hanafin PO, Sermet-Gaudelus I, Griese M, Kappler M, Ellemunter H, Schwarz C, Wilson J, Tan M, Velkov T, Rao GG, Schneider-Futschik EK. Insights Into Patient Variability During Ivacaftor-Lumacaftor Therapy in Cystic Fibrosis. Front Pharmacol 2021; 12:577263. [PMID: 34408649 PMCID: PMC8365608 DOI: 10.3389/fphar.2021.577263] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 05/28/2021] [Indexed: 01/29/2023] Open
Abstract
Background: The advent of cystic fibrosis transmembrane conductance regulator protein (CFTR) modulators like ivacaftor have revolutionised the treatment of cystic fibrosis (CF). However, due to the plethora of variances in disease manifestations in CF, there are inherent challenges in unified responses under CFTR modulator treatment arising from variability in patient outcomes. The pharmacokinetic (PK) data available for ivacaftor-lumacaftor cystic fibrosis (CF) transmembrane conductance regulator (CFTR) modulator drug combination is limited. Methods: Secondary objectives were to identify (1) patient characteristics and (2) the interactions between ivacaftor-lumacaftor responsible for interindividual variability (IIV). Results: Peak plasma concentrations (Cmax) of ivacaftor - lumacaftor were >10 fold lower than expected compared to label information. The one-way ANOVA indicated that the patient site had an effect on Cmax values of ivacaftor metabolites ivacaftor-M1, ivacaftor-M6, and lumacaftor (p < 0.001, p < 0.001, and p < 0.001, respectively). The Spearman's rho test indicated that patient weight and age have an effect on the Cmax of lumacaftor (p = 0.003 and p < 0.001, respectively) and ivacaftor metabolite M1 (p = 0.020 and p < 0.001, respectively). Age (p < 0.001) was found to effect on Cmax of ivacaftor M6 and on Tmax of ivacaftor M1 (p = 0.026). A large impact of patient characteristics on the IIV of PK parameters Cmax and Tmax, was observed among the CF patients. Conclusion: Understanding the many sources of variability can help reduce this individual patient variability and ensure consistent patient outcomes.
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Affiliation(s)
- Patrick O. Hanafin
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Isabelle Sermet-Gaudelus
- Centre Maladie Rare Mucoviscidose, Hôpital Necker-Enfants Malades, Assistance-Publique Hôpitaux de Paris, Paris, France, Institut Necker-Enfants Malades, INSERM U1151, Université Paris Sorbonne, Paris, France
| | - Matthias Griese
- Dr. von Hauner Children’s Hospital, University Hospital, LMU, Munich, German Center for Lung Research, München, Germany
| | - Matthias Kappler
- Dr. von Hauner Children’s Hospital, University Hospital, LMU, Munich, German Center for Lung Research, München, Germany
| | - Helmut Ellemunter
- Department of Child and Adolescent Health, Division of Cardiology, Pulmonology, Allergology and Cystic Fibrosis, Cystic Fibrosis Centre, Medical University of Innsbruck, Innsbruck, Austria
| | - Carsten Schwarz
- Division of Cystic Fibrosis, Department of Pediatric Pneumology, Immunology and Intensive Care, Universitaetsmedizin-Berlin, Berlin, Germany
- CF Center Westbrandenburg, Campus Potsdam, Berlin, Germany
| | - John Wilson
- Department of Medicine, Monash University, The Alfred Hospital, Melbourne, VIC, Australia
- Cystic Fibrosis Service, The Alfred Hospital, Melbourne, VIC, Australia
| | - Marsha Tan
- Department of Biochemistry and Pharmacology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, VIC, Australia
| | - Tony Velkov
- Department of Biochemistry and Pharmacology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, VIC, Australia
| | - Gauri G. Rao
- Division of Pharmacotherapy and Experimental Therapeutics, UNC Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Elena K. Schneider-Futschik
- Department of Biochemistry and Pharmacology, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, VIC, Australia
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Sermet-Gaudelus I, Nguyen-Khoa T, Hatton A, Hayes K, Pranke I. Sweat Chloride Testing and Nasal Potential Difference (NPD) Are Primary Outcome Parameters in Treatment with Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Modulators. J Pers Med 2021; 11:jpm11080729. [PMID: 34442373 PMCID: PMC8398324 DOI: 10.3390/jpm11080729] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/15/2021] [Accepted: 07/20/2021] [Indexed: 01/12/2023] Open
Abstract
With the advent of CFTR modulators, surrogate outcome parameters that accurately quantify the improvement in CFTR activity are needed. In vivo biomarkers that reflect CFTR ion transport and can serve as outcomes in the treatment of CFTR modulators are the sweat Cl- test (SCT), the nasal potential difference (NPD) measurement or the intestinal current measurement (ICM). This review focus on the SCT and NPD. The SCT displays a low intra-patient variability in contrast to the NPD. It has been used extensively as a biomarker of CFTR function in clinical trials of CFTR modulator therapies and provides evidence for change in the short term. The level of functional rescue in the NPD increases up to 40% of normal CFTR in patients with a Gly551Asp treated with ivacaftor monotherapy, while in F508del homozygous patients treated with ivacaftor-lumacaftor, activity increased on average up to ~20% of normal activity. While both tests provide evidence of the effect on CFTR activity, they cannot be used at an individual level to predict the response to any CFTR modulators. Nevertheless, their rapid modification, reflecting electrophysiological properties, highlight their potential use in proof-of-concept studies for CFTR modulators.
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Affiliation(s)
- Isabelle Sermet-Gaudelus
- INSERM U1151, Institut Necker Enfants Malades, Université Paris Sorbonne, 75015 Paris, France; (T.N.-K.); (A.H.); (I.P.)
- Service de Pneumologie et Allergologie Pédiatriques, Centre de Référence Maladie Rare Mucoviscidose et Maladies Apparentées, Hôpital Necker Enfants Malades, AP-HP Centre Université de Paris, 149 rue de Sèvres, 75743 Paris, France
- European Cystic Fibrosis Society-Clinical Trial Network, 7470 Karup, Denmark;
- Lung, European Reference Network, 75743 Paris, France
- Correspondence: ; Tel./Fax: +33-1-44-49-48-87
| | - Thao Nguyen-Khoa
- INSERM U1151, Institut Necker Enfants Malades, Université Paris Sorbonne, 75015 Paris, France; (T.N.-K.); (A.H.); (I.P.)
- Laboratoires de Biochimie et du Centre Régional de Dépistage Néonatal, Hôpital Necker Enfants Malades, AP-HP Centre Université de Paris, 75015 Paris, France
| | - Aurélie Hatton
- INSERM U1151, Institut Necker Enfants Malades, Université Paris Sorbonne, 75015 Paris, France; (T.N.-K.); (A.H.); (I.P.)
| | - Kate Hayes
- European Cystic Fibrosis Society-Clinical Trial Network, 7470 Karup, Denmark;
- Northern Ireland Clinical Research Facility (NICRF), Wellcome-Wolfson Institute for Experimental Medicine, Belfast City Hospital & Queen’s University Belfast, Belfast BT9 7AB, UK
| | - Iwona Pranke
- INSERM U1151, Institut Necker Enfants Malades, Université Paris Sorbonne, 75015 Paris, France; (T.N.-K.); (A.H.); (I.P.)
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Abstract
Cystic fibrosis is a monogenic disease considered to affect at least 100 000 people worldwide. Mutations in CFTR, the gene encoding the epithelial ion channel that normally transports chloride and bicarbonate, lead to impaired mucus hydration and clearance. Classical cystic fibrosis is thus characterised by chronic pulmonary infection and inflammation, pancreatic exocrine insufficiency, male infertility, and might include several comorbidities such as cystic fibrosis-related diabetes or cystic fibrosis liver disease. This autosomal recessive disease is diagnosed in many regions following newborn screening, whereas in other regions, diagnosis is based on a group of recognised multiorgan clinical manifestations, raised sweat chloride concentrations, or CFTR mutations. Disease that is less easily diagnosed, and in some cases affecting only one organ, can be seen in the context of gene variants leading to residual protein function. Management strategies, including augmenting mucociliary clearance and aggressively treating infections, have gradually improved life expectancy for people with cystic fibrosis. However, restoration of CFTR function via new small molecule modulator drugs is transforming the disease for many patients. Clinical trial pipelines are actively exploring many other approaches, which will be increasingly needed as survival improves and as the population of adults with cystic fibrosis increases. Here, we present the current understanding of CFTR mutations, protein function, and disease pathophysiology, consider strengths and limitations of current management strategies, and look to the future of multidisciplinary care for those with cystic fibrosis.
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Affiliation(s)
- Michal Shteinberg
- Pulmonology Institute and CF Center, Carmel Medical Center, Haifa, Israel; Rappaport Faculty of Medicine, The Technion-Israel Institute of Technology, Haifa, Israel
| | - Iram J Haq
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK; Great North Children's Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | | | - Jane C Davies
- National Heart and Lung Institute, Imperial College London, London, UK; Royal Brompton and Harefield, Guy's and St Thomas' NHS Foundation Trust, London, UK.
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Saint-Criq V, Wang Y, Delpiano L, Lin J, Sheppard DN, Gray MA. Extracellular phosphate enhances the function of F508del-CFTR rescued by CFTR correctors. J Cyst Fibros 2021:S1569-1993(21)00123-5. [PMID: 34020896 DOI: 10.1016/j.jcf.2021.04.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 03/13/2021] [Accepted: 04/26/2021] [Indexed: 11/24/2022]
Abstract
CFTR correctors rescue the plasma membrane expression of F508del-CFTR. Extracellular phosphate enhances F508del-CFTR function rescued by CFTR correctors. Cystic fibrosis airway epithelia express the phosphate transporter SLC34A2. Extracellular phosphate levels might contribute to variable drug responses.
Background: The clinical response to cystic fibrosis transmembrane conductance regulator (CFTR) modulators varies between people with cystic fibrosis (CF) of the same genotype, in part through the action of solute carriers encoded by modifier genes. Here, we investigate whether phosphate transport by SLC34A2 modulates the function of F508del-CFTR after its rescue by CFTR correctors. Methods: With Fischer rat thyroid (FRT) cells heterologously expressing wild-type and F508del-CFTR and fully-differentiated CF and non-CF human airway epithelial cells, we studied SLC34A2 expression and the effects of phosphate on CFTR-mediated transepithelial ion transport. F508del-CFTR was trafficked to the plasma membrane by incubation with different CFTR correctors (alone or in combination) or by low temperature. Results: Quantitative RT-PCR demonstrated that both FRT and primary airway epithelial cells express SLC34A2 mRNA and no differences were found between cells expressing wild-type and F508del-CFTR. For both heterologously expressed and native F508del-CFTR rescued by either VX-809 or C18, the magnitude of CFTR-mediated Cl− currents was dependent on the presence of extracellular phosphate. However, this effect of phosphate was not detected with wild-type and low temperature-rescued F508del-CFTR Cl− currents. Importantly, the modulatory effect of phosphate was observed in native CF airway cells exposed to VX-445, VX-661 and VX-770 (Trikafta) and was dependent on the presence of both sodium and phosphate. Conclusions: Extracellular phosphate modulates the magnitude of CFTR-mediated Cl− currents after F508del-CFTR rescue by clinically-approved CFTR correctors. This effect likely involves electrogenic phosphate transport by SLC34A2. It might contribute to inter-individual variability in the clinical response to CFTR correctors.
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Graeber SY, Vitzthum C, Mall MA. Potential of Intestinal Current Measurement for Personalized Treatment of Patients with Cystic Fibrosis. J Pers Med 2021; 11:jpm11050384. [PMID: 34066648 PMCID: PMC8151208 DOI: 10.3390/jpm11050384] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/02/2021] [Accepted: 05/04/2021] [Indexed: 12/14/2022] Open
Abstract
Refinement of personalized treatment of cystic fibrosis (CF) with emerging medicines targeting the CF basic defect will likely benefit from biomarkers sensitive to detect improvement of cystic fibrosis transmembrane conductance regulator (CFTR) function in individual patients. Intestinal current measurement (ICM) is a technique that enables quantitative assessment of CFTR chloride channel function in rectal tissues or other intestinal epithelia. ICM was originally developed to study the CF ion transport defect in the intestine and has been established as a sensitive biomarker of CFTR function and diagnostic test for CF. With the emergence of CFTR-directed therapeutics, ICM has become an important tool to estimate the level of rescue of CFTR function achieved by approved CFTR modulators, both at the level of CFTR genotype groups, as well as individual patients with CF. In combination with preclinical patient-derived cell culture models, ICM may aid the development of targeted therapies for patients with rare CFTR mutations. Here, we review the principles of ICM and examine how this CFTR biomarker may be used to support diagnostic testing and enhance personalized medicine for individual patients with common as well as rare CFTR mutations in the new era of medicines targeting the underlying cause of CF.
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Affiliation(s)
- Simon Y. Graeber
- Charité—Universitätsmedizin Berlin, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, 13353 Berlin, Germany; (S.Y.G.); (C.V.)
- Berlin Institute of Health, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
- German Centre for Lung Research (DZL), 13353 Berlin, Germany
| | - Constanze Vitzthum
- Charité—Universitätsmedizin Berlin, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, 13353 Berlin, Germany; (S.Y.G.); (C.V.)
- German Centre for Lung Research (DZL), 13353 Berlin, Germany
| | - Marcus A. Mall
- Charité—Universitätsmedizin Berlin, Department of Pediatric Respiratory Medicine, Immunology and Critical Care Medicine, 13353 Berlin, Germany; (S.Y.G.); (C.V.)
- Berlin Institute of Health, Charité—Universitätsmedizin Berlin, 10117 Berlin, Germany
- German Centre for Lung Research (DZL), 13353 Berlin, Germany
- Correspondence: ; Tel.: +49-(30)-450-566-182; Fax: +49-(30)-450-566-931
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Arnaud F, Stremler-Le Bel N, Reynaud-Gaubert M, Mancini J, Gaubert JY, Gorincour G. Computed Tomographic Changes in Patients with Cystic Fibrosis Treated by Combination Therapy with Lumacaftor and Ivacaftor. J Clin Med 2021; 10:jcm10091999. [PMID: 34066942 PMCID: PMC8124862 DOI: 10.3390/jcm10091999] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/17/2021] [Accepted: 04/30/2021] [Indexed: 11/21/2022] Open
Abstract
Background: As Cystic Fibrosis (CF) treatments drastically improved in recent years, tools to assess their efficiency need to be properly evaluated, especially cross-sectional imaging techniques. High-resolution computed tomography (HRCT) scan response to combined lumacaftor- ivacaftor therapy (Orkambi®) in patients with homozygous for F508del CFTR has not yet been assessed. Methods: We conducted a retrospective observational study in two French reference centers in CF in Marseille hospitals, including teenagers (>12 years old) and adults (>18 years) who had received lumacaftor–ivacaftor and for whom we had at disposal at least two CT scans, one at before therapy and one at least six months after therapy start. CT scoring was performed by using the modified version of the Brody score. Results: 34 patients have been included. The mean age was 26 years (12–56 years). There was a significant decrease in the total CT score (65.5 to 60.3, p = 0.049) and mucous plugging subscore (12.3 to 8.7, p = 0.009). Peribronchial wall thickening (PWT) was significantly improved only in the adult group (29.1 to 27.0, p = 0.04). Improvements in total score, peribronchial thickening, and mucous pluggings were significantly correlated with improvement in FEV1 (forced expiratory volume in 1 s). Conclusions: Treatment with lumacaftor–ivacaftor was associated with a significant improvement in the total CT score, which was mainly related to an improvement in mucous pluggings.
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Affiliation(s)
- François Arnaud
- Service d’Imagerie Médicale, AP-HM Hôpital Nord, 13015 Marseille, France
- Correspondence: ; Tel.: +33-609-106-115
| | - Nathalie Stremler-Le Bel
- Centre de Ressource et de Compétences de la Mucoviscidose (CRCM) Pédiatrique, AP-HM Hôpital la Timone, 13005 Marseille, France;
| | - Martine Reynaud-Gaubert
- Centre de Ressources et de Compétences de la Mucoviscidose (CRCM) Adulte, AP-HM Hôpital Nord, 13015 Marseille, France;
| | - Julien Mancini
- Département de Santé Publique, Aix-Marseille Université, APHM, INSERM, IRD, SESSTIM, Hôpital de la Timone, BIOSTIC, 13005 Marseille, France;
| | - Jean-Yves Gaubert
- Service d’Imagerie Médicale, AP-HM Hôpital de la Timone, 13005 Marseille, France;
| | - Guillaume Gorincour
- Institut Méditerranéen d’Imagerie Médicale Appliquée à la Gynécologie, la Grossesse et l’Enfance (IMAGE2), 6 rue Rocca, 13008 Marseille, France;
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Burgel PR, Durieu I, Chiron R, Mely L, Prevotat A, Murris-Espin M, Porzio M, Abely M, Reix P, Marguet C, Macey J, Sermet-Gaudelus I, Corvol H, Bui S, Biouhee T, Hubert D, Munck A, Lemonnier L, Dehillotte C, Silva JD, Paillasseur JL, Martin C. Clinical response to lumacaftor-ivacaftor in patients with cystic fibrosis according to baseline lung function. J Cyst Fibros 2021; 20:220-227. [DOI: 10.1016/j.jcf.2020.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/04/2020] [Accepted: 06/04/2020] [Indexed: 01/08/2023]
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King SJ, Keating D, Williams E, Paul E, Borg BM, Finlayson F, Button BM, Wilson JW, Kotsimbos T. Lumacaftor/ivacaftor-associated health stabilisation in adults with severe cystic fibrosis. ERJ Open Res 2021; 7:00203-2020. [PMID: 33569502 PMCID: PMC7861032 DOI: 10.1183/23120541.00203-2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 10/27/2020] [Indexed: 11/05/2022] Open
Abstract
Introduction Lumacaftor/ivacaftor (LUM/IVA) has been shown to improve clinical outcomes in cystic fibrosis (CF) patients homozygous for Phe508del with forced expiratory volume in 1 s (FEV1) % pred >40%. We assessed the clinical utility of LUM/IVA in all eligible adult CF patients with FEV1 % pred <40% treated for at least 1 year under a single-centre managed access programme. Methods Following clinical optimisation, eligible patients (n=40) with FEV1 % pred <40% were commenced on LUM/IVA and monitored for tolerance and clinical outcomes, including health service utilisation, pulmonary function, weight and body composition. 24 patients reached 1 year of treatment by the time of evaluation. Six patients discontinued due to adverse events (five for increased airways reactivity) and three underwent lung transplantation. Results In comparison with the year prior to LUM/IVA commencement, significant reductions (median per year) were observed in the treatment year in the number of pulmonary exacerbations requiring hospitalisation (from 3 to 1.5; p=0.0002), hospitalisation days (from 27 to 17; p=0.0002) and intravenous antibiotic (IVAB) usage days (from 45 to 27; p=0.0007). Mean±sd change in FEV1 % pred was −2.10±1.18% per year in the year prior, with the decline reversed in the year following (+1.45±1.13% per year; p=0.035), although there was significant heterogeneity in individual responses. Mean±sd weight gain at 1 year was 2.5±4.1 kg (p=0.0007), comprising mainly fat mass (mean 2.2 kg). The proportion of patients severely underweight (body mass index <18.5 kg·m−2) decreased from 33% at baseline to 13% at 1 year (p=0.003). Conclusion This real-world evaluation study demonstrated benefits over several clinical domains (infective exacerbations requiring hospitalisation, IVABs, pulmonary function decline and nutritional parameters) in CF patients with severe lung disease. In adults with severe cystic fibrosis lung disease, 1 year of treatment with lumacaftor/ivacaftor was associated with reduced infective exacerbations, days of intravenous antibiotics and rate of pulmonary function decline, and improved nutritional statushttps://bit.ly/2I07suR
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Affiliation(s)
- Susannah J King
- Nutrition Dept, Alfred Hospital, Melbourne, Australia.,Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia.,Dept of Dietetics, Nutrition and Sport, LaTrobe University, Bundoora, Australia
| | - Dominic Keating
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia.,Dept of Medicine, Monash University, Melbourne, Australia
| | - Elyssa Williams
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia
| | - Eldho Paul
- School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Brigitte M Borg
- Physiology Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia
| | - Felicity Finlayson
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia
| | - Brenda M Button
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia.,Dept of Medicine, Monash University, Melbourne, Australia.,Physiotherapy Dept, Alfred Hospital, Melbourne, Australia
| | - John W Wilson
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia.,Dept of Medicine, Monash University, Melbourne, Australia
| | - Tom Kotsimbos
- Cystic Fibrosis Service, Dept of Respiratory Medicine, Alfred Hospital, Melbourne, Australia.,Dept of Medicine, Monash University, Melbourne, Australia
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Bardin E, Pastor A, Semeraro M, Golec A, Hayes K, Chevalier B, Berhal F, Prestat G, Hinzpeter A, Gravier-Pelletier C, Pranke I, Sermet-Gaudelus I. Modulators of CFTR. Updates on clinical development and future directions. Eur J Med Chem 2021; 213:113195. [PMID: 33524685 DOI: 10.1016/j.ejmech.2021.113195] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/19/2022]
Abstract
Cystic fibrosis (CF) is the most frequent life-limiting autosomal recessive disorder in the Caucasian population. It is due to mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene. Current symptomatic CF therapies, which treat the downstream consequences of CFTR mutations, have increased survival. Better knowledge of the CFTR protein has enabled pharmacologic therapy aiming to restore mutated CFTR expression and function. These CFTR "modulators" have revolutionised the CF therapeutic landscape, with the potential to transform prognosis for a considerable number of patients. This review provides a brief summary of their mechanism of action and presents a thorough review of the results obtained from clinical trials of CFTR modulators.
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Affiliation(s)
| | - Alexandra Pastor
- LCBPT, UMR CNRS 8601, Paris, France; Université de Paris, Paris, France
| | - Michaela Semeraro
- Centre d'Investigation Clinique, Unité de Recherche Clinique-CIC P1419, Hôpital Necker Enfants Malades, Université de Paris, Paris, France
| | - Anita Golec
- Institut Necker Enfants Malades. INSERM U1151, Paris, France
| | - Kate Hayes
- Clinical Trial Network, European Cystic Fibrosis Society, Belfast, Ireland
| | | | - Farouk Berhal
- LCBPT, UMR CNRS 8601, Paris, France; Université de Paris, Paris, France
| | - Guillaume Prestat
- LCBPT, UMR CNRS 8601, Paris, France; Université de Paris, Paris, France
| | | | | | - Iwona Pranke
- Institut Necker Enfants Malades. INSERM U1151, Paris, France
| | - Isabelle Sermet-Gaudelus
- Institut Necker Enfants Malades. INSERM U1151, Paris, France; Université de Paris, Paris, France; Clinical Trial Network, European Cystic Fibrosis Society, Belfast, Ireland; Centre de Référence Maladies Rares, Mucoviscidose et Maladies de CFTR, Hôpital Necker Enfants Malades, Paris, France; European Respiratory Network Lung, Paris, France.
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Bui S, Masson A, Enaud R, Roditis L, Dournes G, Galode F, Collet C, Mas E, Languepin J, Fayon M, Beaufils F, Mittaine M. Long-Term Outcomes in Real Life of Lumacaftor-Ivacaftor Treatment in Adolescents With Cystic Fibrosis. Front Pediatr 2021; 9:744705. [PMID: 34869102 PMCID: PMC8634876 DOI: 10.3389/fped.2021.744705] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 10/12/2021] [Indexed: 11/30/2022] Open
Abstract
Background: The combination of the CFTR corrector lumacaftor (LUM) and potentiator ivacaftor (IVA) has been labeled in France since 2015 for F508del homozygote cystic fibrosis (CF) patients over 12 years. In this real-life study, we aimed (i) to compare the changes in lung function, clinical (e.g., body mass index and pulmonary exacerbations) and radiological parameters, and in sweat chloride concentration before and after initiation of LUM/IVA treatment; (ii) to identify factors associated with response to treatment; and (iii) to assess the tolerance to treatment. Materials and Methods: In this tri-center, non-interventional, and observational cohort study, children (12-18 years old) were assessed prospectively during the 2 years of therapy, and retrospectively during the 2 years preceding treatment. Data collected and analyzed for the study were exclusively extracted from the medical electronic system records of the patients. Results: Forty adolescents aged 12.0-17.4 years at LUM/IVA initiation were included. The lung function decreased significantly during and prior to treatment and increased after LUM/IVA initiation, becoming significant after 2 years of treatment. LUM/IVA significantly improved the BMI Z-score and sweat chloride concentration. By contrast, there was no significant change in exacerbation rates, antibiotic use, or CT scan scores. Age at LUM/IVA initiation was lower in good responders and associated with greater ppFEV1 change during the 2 years of treatment. LUM/IVA was well-tolerated. Conclusion: In F508del homozygote adolescents, real-life long-term LUM/IVA improved the ppFEV1 trajectory, particularly in the youngest patients, nutritional status, and sweat chloride concentration but not exacerbation rates or radiological scores. LUM/IVA was generally well-tolerated and safe.
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Affiliation(s)
- Stéphanie Bui
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France
| | - Alexandra Masson
- Limoges University Hospital, Paediatric Cystic Fibrosis Reference Center (CRCM), Limoges, France
| | - Raphaël Enaud
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France.,Bordeaux University, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Radiology, Bordeaux, France
| | - Léa Roditis
- Toulouse University Hospital, Paediatric Cystic Fibrosis Reference Center (CRCM), Department of Pediatric-pulmonology, Toulouse, France
| | - Gaël Dournes
- Bordeaux University, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Radiology, Bordeaux, France
| | - François Galode
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France
| | - Cyrielle Collet
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France
| | - Emmanuel Mas
- Toulouse University Hospital, Paediatric Cystic Fibrosis Reference Center (CRCM), Department of Pediatric-pulmonology, Toulouse, France
| | - Jeanne Languepin
- Limoges University Hospital, Paediatric Cystic Fibrosis Reference Center (CRCM), Limoges, France
| | - Michael Fayon
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France.,Bordeaux University, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Radiology, Bordeaux, France
| | - Fabien Beaufils
- Bordeaux University Hospital, Hôpital Pellegrin-Enfants, Paediatric Cystic Fibrosis Reference Center (CRCM), Centre d'Investigation Clinique (CIC 1401), Bordeaux, France.,Bordeaux University, Centre de Recherche Cardio-Thoracique de Bordeaux, U1045, Radiology, Bordeaux, France
| | - Marie Mittaine
- Toulouse University Hospital, Paediatric Cystic Fibrosis Reference Center (CRCM), Department of Pediatric-pulmonology, Toulouse, France
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38
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Flume PA, Castellani C, Davies J. JCF Year in Review. J Cyst Fibros 2021; 20:1-2. [PMID: 33526211 DOI: 10.1016/j.jcf.2021.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Abstract
Cystic fibrosis (CF) is the most frequent genetic disorder in the Caucasian population benefiting from systematic newborn screening tests. It is also the most frequent indication of prenatal and preimplantation genetic diagnosis for a single gene disorder. During the past thirty years, thanks in part to the evolution of diagnostic techniques, our knowledge on CFTR genetics and pathophysiological mechanisms involved in CF have significantly improved. With the implementation of newborn screening in France and in several countries, the diagnosis now often occurs in clinically asymptomatic infants and this has modified the criteria for CF diagnosis. Recently, guidelines for CF diagnosis have been reformulated in Europe and the US, in regard to sweat chloride usual values and disease terminology. This review describes the methods and molecular approaches that are used in routine practice or are being developed to detect CFTR protein dysfunction and to identify disease-causing CFTR variants. Ultimately, an optimal use of all these functional and genetic resources may improve patient care and therapeutic decision-making. © 2020 French Society of Pediatrics. Published by Elsevier Masson SAS. All rights reserved.
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Affiliation(s)
- T Bienvenu
- Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, APHP. Centre Université de Paris, Paris.
| | - T Nguyen-Khoa
- Laboratoires de Biochimie Générale & du Centre Régional du Dépistage Néonatal Ile-de-France, Hôpital Necker-Enfants Malades, APHP. Centre Université de Paris, Paris; Centre de Ressources et de Compétences de la Mucoviscidose, Hôpital Necker-Enfants Malades, AP-HP. Centre Université de Paris, Paris; Institut Necker Enfants Malades/INSERM U1151, Mucoviscidose et autres maladies épithéliales respiratoires par défaut de repliement protéique, Université Paris Descartes, Paris
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40
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Martin N, Bergougnoux A, Baatallah N, Chevalier B, Varilh J, Baux D, Costes B, Fanen P, Raynal C, Sermet-Gaudelus I, Girodon E, Taulan-Cadars M, Hinzpeter A. Exon identity influences splicing induced by exonic variants and in silico prediction efficacy. J Cyst Fibros 2020; 20:464-472. [PMID: 33341408 DOI: 10.1016/j.jcf.2020.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 09/22/2020] [Accepted: 12/03/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Minigenes and in silico prediction tools are commonly used to assess the impact on splicing of CFTR variants. Exon skipping is often neglected though it could impact the efficacy of targeted therapies. The aim of the study was to identify exon skipping associated with CFTR variants and to evaluate in silico predictions of seven freely available software. METHODS CFTR basal exon skipping was evaluated on endogenous mRNA extracted from non-CF nasal cells and on two CFTR minigene banks. In silico tools and minigene systems were used to evaluate the impact of CFTR exonic variants on exon skipping. RESULTS Data showed that out of 65 CFTR variants tested, 26 enhanced exon skipping and that in silico prediction efficacy was of 50%-66%. Some in silico tools presented predictions with a bias towards the occurrence of splicing events while others presented a bias towards the absence of splicing events (non-detection including true negatives and false negatives). Classification of exons depending on their basal exon skipping level increased prediction rates up to 80%. CONCLUSION This study indicates that taking basal exon skipping into account could orientate the choice of the in silico tools to improve prediction rates. It also highlights the need to validate effects using in vitro assays or mRNA studies in patients. Eventually, it shows that variant-guided therapy should also target exon skipping associated with variants.
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Affiliation(s)
- Natacha Martin
- INSERM, U955, Institut de Recherche Henri Mondor, IMRB, Créteil, France
| | - Anne Bergougnoux
- CHU de Montpellier, Laboratoire de Génétique Moléculaire, Montpellier, France; Université de Montpellier, Laboratoire de Génétique de Maladies Rares, EA7402 Montpellier, France
| | - Nesrine Baatallah
- INSERM U1151, Institut Necker Enfants Malades, INEM, Paris, France; Université Paris Descartes, Paris, France
| | - Benoit Chevalier
- INSERM U1151, Institut Necker Enfants Malades, INEM, Paris, France; Université Paris Descartes, Paris, France
| | - Jessica Varilh
- Université de Montpellier, Laboratoire de Génétique de Maladies Rares, EA7402 Montpellier, France
| | - David Baux
- CHU de Montpellier, Laboratoire de Génétique Moléculaire, Montpellier, France; Université de Montpellier, Laboratoire de Génétique de Maladies Rares, EA7402 Montpellier, France
| | - Bruno Costes
- INSERM, U955, Institut de Recherche Henri Mondor, IMRB, Créteil, France
| | - Pascale Fanen
- INSERM, U955, Institut de Recherche Henri Mondor, IMRB, Créteil, France; Department of Genetics, GH Henri Mondor, APHP, Créteil, France
| | - Caroline Raynal
- CHU de Montpellier, Laboratoire de Génétique Moléculaire, Montpellier, France; Université de Montpellier, Laboratoire de Génétique de Maladies Rares, EA7402 Montpellier, France
| | - Isabelle Sermet-Gaudelus
- INSERM U1151, Institut Necker Enfants Malades, INEM, Paris, France; Université Paris Descartes, Paris, France
| | - Emmanuelle Girodon
- INSERM U1151, Institut Necker Enfants Malades, INEM, Paris, France; Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, APHP Centre-Université de Paris, Paris, France
| | - Magali Taulan-Cadars
- Université de Montpellier, Laboratoire de Génétique de Maladies Rares, EA7402 Montpellier, France.
| | - Alexandre Hinzpeter
- INSERM U1151, Institut Necker Enfants Malades, INEM, Paris, France; Université Paris Descartes, Paris, France.
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Abstract
During the year 2019, research and case reports/series in the field of cystic fibrosis (CF) were in abundance. To adequately address the large body of CF research published during 2019, the CF year in review will be divided into three sections. This report is the first section, focusing specifically on new research related to cystic fibrosis transmembrane conductance regulator modulator therapy. Additional sections will concentrate on pulmonary and infections research and the multisystem effects of CF. It is an exciting time to be providing care for patients and their families with CF with all the exciting new discoveries that will be shared in these reviews.
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Affiliation(s)
- Adrienne P Savant
- Children's Hospital of New Orleans, New Orleans, Louisiana.,Department of Pediatrics, Division of Pulmonary Medicine, Tulane University School of Medicine, New Orleans, Illinois
| | - Susanna A McColley
- Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois.,Stanley Manne Children's Research Institute, Chicago, Illinois.,Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
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42
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Abstract
Cystic fibrosis (CF) is an autosomal recessive disorder caused by mutations in the CF transmembrane conductance regulator (CFTR) gene [1]. The CFTR protein is an ion channel that mediates chloride and bicarbonate transport in epithelial cells of multiple organs including lungs, pancreas and intestine [2, 3]. A defective CFTR protein produces an impaired ion and fluid secretion in the epithelial cells affecting several organs and leading to severe lung disease. More than 2000 CF-causing mutations have been identified [4, 5]. The most common mutation, the deletion of phenylalanine at position 508 (F508del), induces misfolding of the protein that is retained in the endoplasmic reticulum and degraded by proteasomal pathways [6]. The entry into the clinic of CFTR modulators such as TRIKAFTA has significantly improved life for ∼90% CF patients carrying one or two F508del mutations but challenges remain for rare CFTR mutations and the management of lung infections @SaraOcana1https://bit.ly/3aRafQF
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Affiliation(s)
- Sara Cuevas-Ocaña
- Wolfson Centre for Stem Cells, Tissue Engineering and Modelling, School of Medicine, University of Nottingham Biodiscovery Institute, Nottingham, UK
| | - Onofrio Laselva
- Program in Molecular Medicine, The Hospital for Sick Children, Toronto, Canada.,Dept of Physiology, University of Toronto, Toronto, Canada
| | - Julie Avolio
- Program in Translational Medicine, SickKids Research Institute, The Hospital for Sick Children, Toronto, Canada
| | - Raffaella Nenna
- Dept of Paediatrics, "Sapienza" University of Rome, Rome, Italy
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43
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Reyes-Ortega F, Qiu F, Schneider-Futschik EK. Multiple Reaction Monitoring Mass Spectrometry for the Drug Monitoring of Ivacaftor, Tezacaftor, and Elexacaftor Treatment Response in Cystic Fibrosis: A High-Throughput Method. ACS Pharmacol Transl Sci 2020; 3:987-996. [PMID: 33073196 DOI: 10.1021/acsptsci.0c00103] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Indexed: 12/11/2022]
Abstract
Ivacaftor-tezacaftor and ivacaftor-tezacaftor-elexacaftor are new breakthrough cystic fibrosis (CF) drug combinations that directly modulate the activity and trafficking of the defective CF transmembrane conductance regulator protein (CFTR) underlying the CF disease state. Currently, in the hospital setting, there are no therapeutic drug monitoring assays for these very expensive, albeit, life-saving drugs. A rapid and precise novel method for the quantification of ivacaftor, its metabolites, tezacaftor, and elexacaftor, in human plasma was developed and validated using multiple reaction monitoring mass spectrometry (MRM/MS). The MRM/MS analytical method was validated at a concentration range of 0.0025-1 μg/mL for ivacaftor, ivacaftor-M1, ivacaftor-M6, tezacaftor, and elexacaftor in human plasma. The method displayed good accuracy (90.62-94.51%) and reproducibility (99.91-100%) including at low concentrations 0.01 μg/mL. With a mobile phase consisting of [acetonitrile/water]/0.1% formic acid (70:30 v/v) at a flow rate of 0.5 mL/min, a linear correlation was observed over a concentration range of 0.0025-1 μg/mL in human plasma for ivacaftor (R 2 = 0.9865105), ivacaftor-M1 (R 2 = 0.9852684), ivacaftor-M6 (R 2 = 0.9911764), tezacaftor (R 2 = 0.98742470), and elexacaftor (R 2 = 0.9897608). The reported method can accurately quantify ivacaftor, ivacaftor-M1, ivacaftor-M6, tezacaftor, and elexacaftor at low concentrations in human plasma. We have established a cost-efficient and timely method for measuring ivacaftor, its metabolites, and tezacaftor with or without elexacaftor in human plasma suitable for high-throughput applications in the hospital settings or clinical trials.
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Affiliation(s)
- Felisa Reyes-Ortega
- Clinical Research Unit, Pathology Anatomic Building, University Hospital Reina Sofía, Maimónides Biomedical Research Institute of Córdoba (IMIBIC), Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
| | - Fiona Qiu
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Elena K Schneider-Futschik
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
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44
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Johnson BJ, Choby GW, O'Brien EK. Chronic rhinosinusitis in patients with cystic fibrosis-Current management and new treatments. Laryngoscope Investig Otolaryngol 2020; 5:368-374. [PMID: 32596478 PMCID: PMC7314487 DOI: 10.1002/lio2.401] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 04/27/2020] [Accepted: 05/02/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES The purpose of this article is to provide a state-of-the-art review of the literature and summarize the latest publications on medical and surgical treatment of cystic fibrosis (CF) chronic rhinosinusitis (CRS), with an emphasis on describing recent advancements in cystic fibrosis transmembrane conductance regulator (CFTR) modulator therapies. METHODS A comprehensive literature review was conducted utilizing the PubMed database with search phrases detailed within the body of the article. Abstracts were reviewed to include publications detailing medical, surgical, and CFTR modulating therapies for CF CRS. Findings from studies not previously reviewed and publications regarding CFTR modulators were emphasized. RESULTS No clear guidelines for treatment of CF CRS are available. Nasal saline rinses, topical steroids, topical antibiotics, and topical dornase alfa are reported medical therapies. Ivacaftor has some sinonasal symptomatic benefit. A new triple therapy CFTR modulator, elexacaftor/tezacaftor/ivacaftor, is capable of treating 90% of patients with CF and has shown the greatest FEV1 improvement of any CFTR modulator yet. There is no clear consensus on surgical indications or technique, though aggressive surgery in recalcitrant disease has shown some symptomatic benefit. Endoscopic sinus surgery after lung transplantation may benefit some patients in whom the sinuses serve as a reservoir for recurrent pulmonary infections by decreasing rates of bronchiolitis obliterans syndrome and improving 5 year survival. CONCLUSION As lifespan increases for patients with CF, further investigation into medical therapy, CFTR modulator sinonasal outcomes, and surgical technique and outcomes for CF CRS is needed. LEVEL OF EVIDENCE 5.
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Affiliation(s)
| | - Garret W. Choby
- Department of OtorhinolaryngologyMayo ClinicRochesterMinnesotaUSA
| | - Erin K. O'Brien
- Department of OtorhinolaryngologyMayo ClinicRochesterMinnesotaUSA
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45
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Allobawi R, Ghelani DP, Schneider-Futschik EK. Metabolomic Description of Ivacaftor Elevating Polymyxin B Mediated Antibacterial Activity in Cystic Fibrosis Pseudomonas aeruginosa. ACS Pharmacol Transl Sci 2020; 3:433-443. [PMID: 32566909 DOI: 10.1021/acsptsci.0c00030] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Indexed: 02/08/2023]
Abstract
We have demonstrated that ivacaftor displays synergistic antibacterial activity in combination with polymyxin B against polymyxin-resistant Pseudomonas aeruginosa that commonly colonizes the lungs of people with cystic fibrosis (CF). However, the underlying mechanism(s) remain unclear. In the present study, we employed untargeted metabolomics to investigate the synergistic killing mechanism of polymyxin B in combination with ivacaftor against a polymyxin-susceptible P. aeruginosa FADDI-PA111 (polymyxin B MIC = 2 mg/L) and a polymyxin-resistant CF P. aeruginosa FADDI-PA006 (polymyxin B MIC = 8 mg/L). Metabolites were extracted at 3 h after treatments with polymyxin B alone (2 μg/mL for FADDI-PA111 and 4 μg/mL FADDI-PA006 P. aeruginosa), ivacaftor alone (8 μg/mL), and in combination. Polymyxin B monotherapy induced significant perturbations in the glycerophospholipid and fatty acid metabolism pathways against FADDI-PA111 and to a lesser extent in FADDI-PA006. In both strains, treatment with ivacaftor alone induced more pronounced perturbations in glycerophospholipid and fatty acid metabolism pathways than that with polymyxin B alone. This highlights the unique antimicrobial mode of action of ivacaftor. Pathway analysis revealed that in combination treatment, polymyxin B mediated killing is elevated by ivacaftor, largely due to the inhibition of cell envelope biogenesis via suppression of key membrane lipid metabolites (e.g., sn-glycerol 3-phosphate and sn-glycero-3-phosphoethanolamine) as well as perturbations in peptidoglycan and lipopolysaccharide biosynthesis. Furthermore, significant perturbations in the levels of amino sugars and nucleotide sugars, glycolysis, the tricarboxylic acid cycle, and pyrimidine ribonucleotide biogenesis were observed with the combination treatment. These findings provide novel mechanistic information on the synergistic antibacterial activity of polymyxin-ivacaftor combination.
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Affiliation(s)
- Rafah Allobawi
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Drishti P Ghelani
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Elena K Schneider-Futschik
- Department of Pharmacology & Therapeutics, School of Biomedical Sciences, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
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46
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Favia M, Gallo C, Guerra L, De Venuto D, Diana A, Polizzi AM, Montemurro P, Mariggiò MA, Leonetti G, Manca A, Casavola V, Conese M. Treatment of Cystic Fibrosis Patients Homozygous for F508del with Lumacaftor-Ivacaftor (Orkambi ®) Restores Defective CFTR Channel Function in Circulating Mononuclear Cells. Int J Mol Sci 2020; 21:E2398. [PMID: 32244302 DOI: 10.3390/ijms21072398] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/13/2020] [Accepted: 03/25/2020] [Indexed: 02/05/2023] Open
Abstract
The treatment of cystic fibrosis (CF) patients homozygous for the F508del mutation with Orkambi®, a combination of a corrector (lumacaftor) and a potentiator (ivacaftor) of the mutated CFTR protein, resulted in some amelioration of the respiratory function. However, a great variability in the clinical response was also observed. The aim of this study was to evaluate the response to Orkambi® in a small cohort of F508del/F508del patients (n = 14) in terms of clinical and laboratory parameters, including ex vivo CFTR activity in mononuclear cells (MNCs), during a 12-month treatment. Patients responded with an increase in percent predicted forced expiratory volume in 1 s (FEV1%) and body mass index (BMI) as well as with a decrease in white blood cell (WBC) total counts and serum C-reactive protein (CRP) levels, although not significantly. Sweat chloride and CFTR-dependent chloride efflux were found to decrease and increase, respectively, as compared with pre-therapy values. CFTR and BMI showed a statistically significant correlation during Orkambi® treatment. Clustering analysis showed that CFTR, BMI, sweat chloride, FEV1%, and WBC were strongly associated. These data support the notion that CFTR-dependent chloride efflux in MNCs should be investigated as a sensitive outcome measure of Orkambi® treatment in CF patients.
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47
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Kleizen B, Hunt JF, Callebaut I, Hwang TC, Sermet-Gaudelus I, Hafkemeyer S, Sheppard DN. CFTR: New insights into structure and function and implications for modulation by small molecules. J Cyst Fibros 2020; 19 Suppl 1:S19-S24. [DOI: 10.1016/j.jcf.2019.10.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 10/17/2019] [Accepted: 10/18/2019] [Indexed: 12/22/2022]
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48
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Burgel PR, Munck A, Durieu I, Chiron R, Mely L, Prevotat A, Murris-Espin M, Porzio M, Abely M, Reix P, Marguet C, Macey J, Sermet-Gaudelus I, Corvol H, Bui S, Lemonnier L, Dehillotte C, Da Silva J, Paillasseur JL, Hubert D, Mounard J, Poulet C, Rames C, Person C, Troussier F, Urban T, Dalphin ML, Dalphin JC, Pernet D, Richaud-Thiriez B, Bui S, Fayon M, Macey-Caro J, Campbell K, Laurans M, Borderon C, Heraud MC, Labbé A, Montcouquiol S, Bassinet L, Remus N, Fanton A, Houzel-Charavel A, Huet F, Perez-Martin S, Boldron-Ghaddar A, Scalbert M, Mely L, Camara B, Llerena C, Pin I, Quétant S, Cottereau A, Deschildre A, Gicquello A, Perez T, Stervinou-Wemeau L, Thumerelle C, Wallaert B, Wizla N, Languepin J, Ménétrey C, Dupuy-Grasset M, Bazus L, Buchs C, Jubin V, Werck-Gallois MC, Mainguy C, Perrin T, Reix P, Toutain-Rigolet A, Durieu I, Durupt S, Reynaud Q, Nove-Josserand R, Baravalle-Einaudi M, Coltey B, Dufeu N, Dubus JC, Stremler N, Caimmi D, Chiron R, Billon Y, Derelle J, Kieffer S, Pichon AS, Schweitzer C, Tatopoulos A, Abbes S, Bihouée T, Danner-Boucher I, David V, Haloun A, Tissot A, Leroy S, Bailly-Piccini C, Clément A, Corvol H, Tamalet A, Burgel PR, Honoré I, Hubert D, Kanaan R, Martin C, Bailly C, Chédevergne F, De Blic J, Fauroux B, Le Bourgeois M, Sermet-Gaudelus I, Delaisi B, Gérardin M, Munck A, Abély M, Ravoninjatovo B, Belleguic C, Desrues B, Brinchault G, Dagorne M, Deneuville E, Lefeuvre S, Dirou A, Le Bihan J, Ramel S, Dominique S, Marguet C, Payet A, Kessler R, Porzio M, Rosner V, Weiss L, de Miranda S, Grenet D, Hamid A, Picard C, Brémont F, Didier A, Labouret G, Mittaine M, Murris-Espin M, Têtu L, Cosson L, Giraut C, Henriet AC, Mankikian J, Marchand S, Hugé S, Storni V, Coirier-Duet E. Real-Life Safety and Effectiveness of Lumacaftor–Ivacaftor in Patients with Cystic Fibrosis. Am J Respir Crit Care Med 2020; 201:188-197. [DOI: 10.1164/rccm.201906-1227oc] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Pierre-Régis Burgel
- Université de Paris, Institut Cochin, INSERM U1016, Paris, France
- Respiratory Medicine and National Reference Cystic Fibrosis Reference Center, Cochin Hospital, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris, France
- ERN-Lung CF Network
| | - Anne Munck
- Hôpital Robert Debré, AP-HP, Paris, France
| | - Isabelle Durieu
- ERN-Lung CF Network
- Centre de Référence Adulte de la Mucoviscidose, Service de Médecine Interne, Hospices Civils de Lyon, Pierre Bénite, France
- Université de Lyon, Équipe d’Accueil Health Services and Performance Research (HESPER) 7425, Lyon, France
| | - Raphaël Chiron
- Cystic Fibrosis Center, Hôpital Arnaud de Villeneuve, Centre Hospitalier Universitaire de Montpellier, Université de Montpellier, Montpellier, France
| | - Laurent Mely
- Hôpital Renée Sabran, Cystic Fibrosis Center, Giens, France
| | - Anne Prevotat
- CHU-Lille, Cystic Fibrosis Center, Service de Pneumologie et Immuno-allergologie, Hôpital Calmette and Université de Lille, Lille, France
| | - Marlene Murris-Espin
- Cystic Fibrosis Center, Service de Pneumologie, Pôle des Voies Respiratoires, Hôpital Larrey, CHU de Toulouse, Toulouse, France
| | - Michele Porzio
- Department of Respiratory Medicine and Cystic Fibrosis Center, Federation of Translational Medicine of Strasbourg, University Hospitals, Strasbourg, France
| | - Michel Abely
- Department of Pediatrics A and Cystic Fibrosis Center, American Memorial Hospital, Reims, France
| | - Philippe Reix
- UMR 5558 CNRS, Equipe EMET, Université Claude Bernard Lyon 1, Lyon, France
- Cystic Fibrosis Center, Hospices Civils de Lyon, Lyon, France
| | - Christophe Marguet
- Pediatric Respiratory Disease and Cystic Fibrosis Center, Hospital, UNIROUEN, INSERM EA 2656, Rouen University Hospital, Université de Normandie, Rouen, France
| | - Julie Macey
- Respiratory Medicine and Cystic Fibrosis Center, CHU de Bordeaux, Bordeaux, France
| | - Isabelle Sermet-Gaudelus
- ERN-Lung CF Network
- Pediatric Respiratory Disease and Cystic Fibrosis Center, National Reference Cystic Fibrosis Reference Center, Hôpital Necker Enfants Malades, Paris France
- INSERM U 1151, Institut Necker Enfants Malades, Paris, France
| | - Harriet Corvol
- Sorbonne Université, Centre de Recherche Saint-Antoine, Paris, France
- Pediatric Respiratory Disease and Cystic Fibrosis Center, Hôpital Trousseau, AP-HP, Paris, France
| | - Stéphanie Bui
- Pediatric Respiratory Disease and Cystic Fibrosis Center and CIC 1401, CHU de Bordeaux, Bordeaux, France
| | | | | | - Jennifer Da Silva
- Université de Paris, Institut Cochin, INSERM U1016, Paris, France
- ERN-Lung CF Network
- URC-CIC Paris Descartes Necker Cochin, AP-HP, Hôpital Cochin, Paris, France; and
| | | | - Dominique Hubert
- Respiratory Medicine and National Reference Cystic Fibrosis Reference Center, Cochin Hospital, Assistance Publique–Hôpitaux de Paris (AP-HP), Paris, France
- ERN-Lung CF Network
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Bell SC, Mall MA, Gutierrez H, Macek M, Madge S, Davies JC, Burgel PR, Tullis E, Castaños C, Castellani C, Byrnes CA, Cathcart F, Chotirmall SH, Cosgriff R, Eichler I, Fajac I, Goss CH, Drevinek P, Farrell PM, Gravelle AM, Havermans T, Mayer-Hamblett N, Kashirskaya N, Kerem E, Mathew JL, McKone EF, Naehrlich L, Nasr SZ, Oates GR, O'Neill C, Pypops U, Raraigh KS, Rowe SM, Southern KW, Sivam S, Stephenson AL, Zampoli M, Ratjen F. The future of cystic fibrosis care: a global perspective. The Lancet Respiratory Medicine 2020; 8:65-124. [DOI: 10.1016/s2213-2600(19)30337-6] [Citation(s) in RCA: 351] [Impact Index Per Article: 87.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/19/2019] [Accepted: 08/14/2019] [Indexed: 02/06/2023]
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Chevalier B, Hinzpeter A. The influence of CFTR complex alleles on precision therapy of cystic fibrosis. J Cyst Fibros 2019; 19 Suppl 1:S15-S18. [PMID: 31883651 DOI: 10.1016/j.jcf.2019.12.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/14/2019] [Accepted: 12/14/2019] [Indexed: 10/25/2022]
Abstract
CFTR is an extensively studied gene and multiple sequence variants have been identified, many of which still need to be defined as neutral or disease causing. Complex alleles are defined when at least two variants are identified on the same allele. Each pathogenic variant can affect distinct steps of the CFTR biogenesis. As CFTR modulators are being developed to alleviate specific defects, pathogenic variants need to be characterized to propose adequate treatments. Conversely, cis-variants can affect treatment response when defects are additive or if they alter the binding or efficacy of the modulator. Hence, complex alleles increase the complexity of CFTR variant classification and need to be assigned as neutral, disease causing or modulating treatment efficacy. This review was based on a symposium session presented at the 16th ECFS Basic Science Conference, Dubrovnik, Croatia, 27 to 30 March, 2019.
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Affiliation(s)
- Benoit Chevalier
- INSERM U1151, Institut Necker Enfants Malades, Paris, France; Université Paris Descartes, Paris, France.
| | - Alexandre Hinzpeter
- INSERM U1151, Institut Necker Enfants Malades, Paris, France; Université Paris Descartes, Paris, France.
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