74 results on '"N. Khayath"'
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2. Severe eosinophilic asthma with paradoxal worsening T2 bronchial inflammation despite sequencial treatment with mepolizumab and benralizumab
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C Marcot, N Khayath, F De Blay, and N Migueres
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- 2022
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3. Fast-Onset Diffuse Interstitial Lung Disease in Anti-MDA5 Antibodies-Associated Amyopathic Dermatomyositis
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Houari Aissaoui, Kinan Drak Alsibai, and N. Khayath
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Medicine (General) ,medicine.medical_specialty ,dermatomyositis ,Cyclophosphamide ,anti-MDA5 antibodies ,Case Report ,Disease ,polyarthritis ,030207 dermatology & venereal diseases ,03 medical and health sciences ,R5-920 ,0302 clinical medicine ,rapidly progressive interstitial pneumopathy ,medicine ,Medical history ,030203 arthritis & rheumatology ,Autoimmune disease ,business.industry ,Interstitial lung disease ,General Medicine ,Dermatomyositis ,medicine.disease ,Dermatology ,Polyarthritis ,Complication ,business ,medicine.drug - Abstract
Anti-MDA5 antibodies-associated amyopathic dermatomyositisis a rare autoimmune disease that involve polyarthritis, cutaneous and pulmonary manifestations. The development of rapidly progressing interstitial lung disease is a life-threatening complication. We report the case of a 45-year-old woman without medical history, who was addressed to the Pulmonary Department for a polyarthritis with dry cough and hypoxemic dyspnea. Initially there was neither cutaneous manifestation nor interstitial lung disease on chest CT scan. After a few days, the patient developed fatal acute respiratory failure with diffuse ground glass opacities. Identification of anti-MDA5 antibodies allowed establishing diagnosis, despite the fact that the first immunological assessment was negative. Corticosteroid bolus of 1 g for three days and immunosuppressive treatment by cyclophosphamide was only initiated at the acute respiratory distress syndrome stage. Given the rapidly unfavorable prognosis of this entity of amyopathic dermatomyositis, the testing for anti-MDA5 antibodies should be recommended in case of progressive pulmonary symptoms associated with joint signs in order to identify this disease at an early stage and to begin rapid and adequate management.
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- 2021
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4. Moisissures et environnement
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M. Salpin, N. Khayath, D. Charpin, Denis Caillaud, G. Mahay, C. Godet, and C. Marcot
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Pulmonary and Respiratory Medicine - Published
- 2020
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5. Description des asthmatiques échappant aux biothérapies aux hôpitaux universitaires de Strasbourg : étude monocentrique
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M. Thiebaut, C. Metz-Favre, N. Migueres, L. Bohbot, A. Piotin, C. Marcot, F. De Blay, and N. Khayath
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Immunology and Allergy - Published
- 2023
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6. A Case of Excavated Pneumopathy after Bronchial Thermoplasty
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M, Steger, primary, N, Migueres, additional, N, Khayath, additional, C, Marcot, additional, C, Matau, additional, F, Arboit, additional, M, Ohana, additional, and F, De Blay, additional
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- 2022
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7. Bronchial Thermosplaty and severe asthma with frequent severe exacerbations : a controlled study
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Cezar Matau, François Lefebvre, Justine Leroux, A. Molard, Diana Ochea, Frédéric de Blay, and N. Khayath
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medicine.medical_specialty ,business.industry ,Internal medicine ,Severe asthma ,medicine ,business - Published
- 2021
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8. Cluster analysis of indoor environmental factors associated with symptoms of mite allergy
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Frédéric de Blay, A. Dazy, Julien Godet, N. Khayath, Martine Ott, and Edouard Virot
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Adult ,Male ,Pulmonary and Respiratory Medicine ,Allergy ,Adolescent ,Urban Population ,Immunology ,Population ,medicine.disease_cause ,complex mixtures ,Tobacco smoke ,Young Adult ,03 medical and health sciences ,0302 clinical medicine ,Allergen ,Environmental health ,Mite ,Animals ,Cluster Analysis ,Humans ,Immunology and Allergy ,Medicine ,Antigens, Dermatophagoides ,030212 general & internal medicine ,Clinical efficacy ,Child ,education ,Aged ,Asthma ,education.field_of_study ,biology ,business.industry ,Pyroglyphidae ,Environmental Exposure ,Middle Aged ,University hospital ,biology.organism_classification ,medicine.disease ,Rhinitis, Allergic ,respiratory tract diseases ,030228 respiratory system ,Air Pollution, Indoor ,Child, Preschool ,Female ,France ,business - Abstract
Background The clinical efficacy of controlling environmental allergens as a component of allergic asthma treatment remains controversial. Multifaceted allergen reductions appeared to be the most efficient methods. However, they require home visits with indoor technicians. Objective To examine the characteristics of indoor environments that might be related to symptoms of children and adult patients with mite allergic rhinitis and/or asthma. Methods We included 315 patients allergic to house dust mites with rhinitis and/or asthma who had been visited at home by 2 medical indoor environment counselors (MIECs) from the Strasbourg University Hospital between January 2007 and June 2015. In a cluster analysis, we analyzed 42 characteristics of respiratory symptoms, dwelling characteristics, and indoor pollutants in this population. Results Three clusters were defined among the patients. Cluster 1 included 55 patients, all with rhinitis, 32% with asthma, and all living in an urban area. Clusters 2 and 3 included 86 and 174 patients, respectively. The important factors in these 2 clusters were asthma incidence and exposure to different indoor pollutants, such as indoor perfumes, cleaning products, and tobacco smoke. Conclusion Our results underlined the variability of indoor environments and the importance of MIEC home visits to investigate individual patient environments and propose an appropriate avoidance management plan. Our results showed that sensitization to mite and exposure to indoor chemical pollutants were associated with severe asthma.
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- 2019
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9. Profil clinique et qualité de vie des patients asthmatiques sévères de phénotype T2 traités par biothérapies en France : résultats en vraie vie de l’étude multicentrique « Second Souffle »
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A. Didier, C. Raherison-Semjen, C. Camus, E. Verdier, A. Bourdin, P. Bonniaud, S. Fry, G. Devouassoux, F.X. Blanc, C. Pison, C. Dupin, N. Khayath, J. Courdeau, J. Valcke-Brossollet, C. Nocent-Ejnaini, F. Rolland, C. Iamandi, A. Proust, A. Ozier, L. Portel, W. Gaspard, P. Roux-Claude, A. Beurnier, S. Martinez, J.M. Dot, F. Hennegrave, G. Vignal, E. Auvray, N. Paleiron, N. Just, J. Miltgen, M. Russier, C. Olivier, L. Guilleminault, and C. Taillé
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Pulmonary and Respiratory Medicine - Published
- 2022
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10. Clinical characteristics of and outcomes for patients with COVID-19 and comorbid lung diseases primarily hospitalized in a conventional pulmonology unit: A retrospective study
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Carole Ederle, Sandrine Hirschi, Eva Chatron, Michele Porzio, Loic Kassegne, Benjamin Renaud-Picard, C. Marcot, Ronald C. Kessler, Tristan Dégot, Pierre Leyendecker, Aissam Labani, Carine Metz-Favre, F. De Blay, Matthieu Canuet, N. Khayath, Marianne Riou, CHU Strasbourg, Université de Strasbourg (UNISTRA), Fédération Hospitalo-Universitaire (OMICARE), Centre de Recherche d’Immunologie et d’Hématologie [Strasbourg], Fédération de Médecine Translationnelle de Strasbourg (FMTS), Nanomédecine Régénérative (NanoRegMed), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM), and CCSD, Accord Elsevier
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Lung Diseases ,Male ,[SDV]Life Sciences [q-bio] ,Comorbidity ,law.invention ,pCO2, partial pressure of arterial carbon dioxide ,Hospitals, University ,0302 clinical medicine ,law ,030212 general & internal medicine ,Hospital Mortality ,COVID-19, coronavirus disease 2019 ,NIV, non invasive ventilation ,COPD ,Continuous Positive Airway Pressure ,Smoking ,Middle Aged ,Intensive care unit ,ICU, intensive care unit ,3. Good health ,Anti-Bacterial Agents ,[SDV] Life Sciences [q-bio] ,Hospitalization ,Intensive Care Units ,Pulmonology ,medicine.anatomical_structure ,Cohort ,Hypertension ,Female ,Original Article ,France ,Hydroxychloroquine ,Pulmonary and Respiratory Medicine ,congenital, hereditary, and neonatal diseases and abnormalities ,medicine.medical_specialty ,pO2, partial pressure of oxygen ,Antibodies, Monoclonal, Humanized ,Antiviral Agents ,SARS-CoV-2, severe acute respiratory syndrome coronavirus 2 ,RT-PCR, Real-time reverse transcriptase-polymerase chain reaction ,03 medical and health sciences ,Sleep Apnea Syndromes ,Internal medicine ,medicine ,Diabetes Mellitus ,Humans ,Obesity ,Risk factor ,IQR, interquartile range ,Asthma ,Aged ,Retrospective Studies ,Heart Failure ,Lung ,Noninvasive Ventilation ,business.industry ,SARS-CoV-2 ,Oxygen Inhalation Therapy ,Anticoagulants ,COVID-19 ,Retrospective cohort study ,medicine.disease ,ICS, inhaled corticosteroids ,respiratory tract diseases ,Coronavirus ,030228 respiratory system ,COPD, chronic obstructive pulmonary disease ,Chronic Disease ,ACOS, asthma-COPD overlap syndrome ,CPAP, continuous positive airway pressure ,business - Abstract
International audience; Background: Scant data are currently available about a potential link between comorbid chronic lung diseases (CLD) and the risk and severity of the coronavirus disease 2019 (COVID-19) infection.Methods: To describe the clinical characteristics of and outcomes for patients with COVID-19 infection, including patients with comorbid respiratory diseases, who have been primarily hospitalized in the pulmonology department of Strasbourg University Hospital, France. In this retrospective, single-center study, we included all confirmed cases of COVID-19 from March 3 to April 15, 2020. We then compared the symptoms, biological and radiological findings, and outcomes for patients with and without CLD.Results: Of the 124 patients that were enrolled, the median age was 62 years, and 75 patients (60%) were male. Overall, 40% of patients (n=50) had preexisting CLD, including chronic obstructive pulmonary disease (COPD) (n=15, 12%) and asthma (n=19, 15%). Twenty-eight patients were transferred to the intensive care unit (ICU), and six patients died in our unit. CLD were not predictive of ICU hospitalization, but a significantly higher total mortality was observed (17.6% vs. 5.5%, P
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- 2021
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11. SARS-CoV-2 Pneumonia in Hospitalized Asthmatic Patients Did Not Induce Severe Exacerbation
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Frédéric de Blay, Aissam Labani, Julien Godet, Thi Cam Tu Hoang, Carine Metz-Favre, Loic Kassegne, Philippe Fraisse, Benjamin Renaud-Picard, C. Marcot, Ines Abessolo-Amougou, M. Grandbastien, Guillaume Pamart, Samira Fafi-Kremer, Irina Enache, N. Khayath, Virginie Doyen, Pierre Leyendecker, Carole Ederle, Anays Piotin, Louise Manien, Romain Kessler, Marianne Riou, CHU Strasbourg, Fédération Hospitalo-Universitaire (OMICARE), Centre de Recherche d’Immunologie et d’Hématologie [Strasbourg], Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg (UNISTRA), Centre Hospitalier Universitaire Brugmann [Bruxelles] (CHU), Centre recherche en CardioVasculaire et Nutrition = Center for CardioVascular and Nutrition research (C2VN), Aix Marseille Université (AMU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Interaction virus-hôte et maladies du foie, Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM), and CCSD, Accord Elsevier
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Male ,Exacerbation ,[SDV]Life Sciences [q-bio] ,Aucun ,Comorbidity ,medicine.disease_cause ,Severity of Illness Index ,law.invention ,0302 clinical medicine ,exacerbation ,law ,immune system diseases ,ACE2, Angiotensin Converting Enzyme 2 ,Immunology and Allergy ,030212 general & internal medicine ,Coronavirus ,qRT-PCR, quantitative real-time Reverse Transcriptase PCR ,Adrenergic beta-Agonists ,Middle Aged ,Intensive care unit ,3. Good health ,[SDV] Life Sciences [q-bio] ,Hospitalization ,Europe ,Intensive Care Units ,COVID-19, Coronavirus Disease 2019 ,Female ,France ,Coronavirus Infections ,medicine.medical_specialty ,Pneumonia, Viral ,SARS-CoV-2 pneumonia ,FEV1, Flow Expiratory Volume in one second ,Article ,03 medical and health sciences ,Betacoronavirus ,Internal medicine ,ICU, Intensive Care Unit ,Severity of illness ,medicine ,Humans ,FVC, Flow Volume Capacity ,Glucocorticoids ,Pandemics ,Asthma ,Aged ,Retrospective Studies ,business.industry ,SARS-CoV-2 ,COVID-19 ,Retrospective cohort study ,COPD, Chronic Obstructive Pulmonary Disease ,asthma ,medicine.disease ,Respiration, Artificial ,respiratory tract diseases ,Pneumonia ,SARS-CoV-2, Severe Acute Respiratory Syndrome Coronavirus 2 ,030228 respiratory system ,Socioeconomic Factors ,BMI, Body Mass Index ,business - Abstract
Background Viral infections are known to exacerbate asthma in adults. Previous studies have found few asthmatics among SARS-CoV-2 pneumonia cases. However, the relationship between SARS-CoV-2 infection and severe asthma exacerbation is not known. Objective We assessed the frequency of asthma exacerbation in asthmatic patients hospitalized for SARS-CoV-2 pneumonia and compared symptoms laboratory and radiological findings in asthmatic and non-asthmatic patients with SARS-CoV-2 pneumonia. Methods We included 106 patients between March 4 and April 6, 2020, who were hospitalized in the Chest Diseases Department of Strasbourg University Hospital; 23 were asthmatics. To assess the patients’ asthma status, three periods were defined: the last month before the onset of COVID-19 symptoms (p1), pre-hospitalization (p2) and during hospitalization (p3). Severe asthma exacerbations were defined according to GINA guidelines during p1 and p2. During p3, we defined severe asthma deterioration as the onset of breathlessness and wheezing requiring systemic corticosteroids and inhaled beta-2-agonist. Results We found no significant difference between asthmatics and non-asthmatics in terms of severity (length of stay, maximal oxygen flow needed, non-invasive ventilation requirement and ICU transfer). 52.2% of the asthmatic patients were Gina 1. One patient had a severe exacerbation during p1, two patients during p2, and five patients were treated with systemic corticosteroids and inhaled beta-2-agonist during p3. Conclusion Our results demonstrate that asthmatic patients appeared not to be at risk for severe SARS-CoV-2 pneumonia. Moreover, SARS-CoV-2 pneumonia did not induce severe asthma exacerbation., Highlights box: 1. What is already known about this topic? Asthmatic patients are rare in epidemiological studies of SARS-CoV-2 pneumonia. 2. What does this article add to our knowledge? Being asthmatic is not a risk factor for severe SARS-CoV-2. 3. How does this study impact current management guidelines? SARS-CoV-2 pneumonia may not induce severe asthma exacerbation.
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- 2020
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12. Intérêt des tests de provocation nasale pour le pneumologue
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J.-J. Braun, F. de Blay, Virginie Doyen, N. Khayath, and C. Lutz
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Pulmonary and Respiratory Medicine ,Respiratory physician ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Diagnostic accuracy ,medicine.disease ,medicine.disease_cause ,Nasal provocation test ,03 medical and health sciences ,0302 clinical medicine ,Allergen ,030228 respiratory system ,medicine ,Clinical significance ,030212 general & internal medicine ,Intensive care medicine ,business ,Asthma - Abstract
Rhinitis and asthma are common diseases that are strongly linked from both the epidemiological and patho-physiological point of view. A precise aetiological diagnosis is required in order to optimize treatment. Nasal provocation tests (NPT) determine precisely the role of the allergen in the initiation of the symptoms of rhinitis particularly when the history does not produce convincing evidence of the clinical relevance of an allergen. It may also have important consequences for the choice of an allergenic immunotherapy. NPT are not standardized but simple methods based on international recommendations provide us with good diagnostic accuracy. In this paper, we will discuss the practical aspects of NPT as well as the clinical or research situations where they may be useful for the respiratory physician.
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- 2018
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13. Les chambres d’exposition environnementale (CEE) : un nouvel outil dans la recherche académique et industrielle
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Nathalie Domis, Ibrahim Choual, F. De Blay, Laurent Vecellio, C. Radu, S. Jilani, N. Khayath, Service de pneumologie (Strasbourg), CHU Strasbourg-Nouvel Hôpital Civil, Biocluster des Haras, ALYATEC®, Centre d’Etude des Pathologies Respiratoires (CEPR), UMR 1100 (CEPR), Université de Tours (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM), Pôle de pathologie thoracique, and CHU Strasbourg-Hopital Civil
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[SDV.EE.SANT]Life Sciences [q-bio]/Ecology, environment/Health ,0301 basic medicine ,Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Standardized allergenic ,business.industry ,Provocation test ,Allergic asthma ,Environmental exposure ,medicine.disease_cause ,medicine.disease ,respiratory tract diseases ,3. Good health ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,Allergen ,030228 respiratory system ,Allergic symptoms ,Medicine ,ALLERGEN EXPOSURE ,business ,Intensive care medicine ,ComputingMilieux_MISCELLANEOUS ,Asthma - Abstract
Airborne allergic diseases (allergic asthma, rhinitis and conjunctivitis) have reached epidemic proportions and are a great burden for both society and individuals. Therefore we need to better understand the physiopathological mechanisms and to increase clinical research in these diseases. However, traditional outpatient studies are difficult and have number of limitations, in particular the variability of allergen exposure. Yet allergen provocation tests, especially bronchial challenges in asthma, are excellent tools to measure the efficiency of anti-allergic therapies. Environmental exposure chambers (EEC) allow the performance of controlled allergen provocation tests on a large scale with remarkable sensitivity, specificity and reproducibility. Moreover, they allow a precise collection of allergic symptoms, making them interesting tools for patho-physiological and clinical studies. During the last thirty years, they have assisted the study of anti-allergic therapies and provided data on their pharmacodynamic characteristics, particularly in allergic rhinitis. However, there are still no EEC tests centered on asthma. The EEC of Strasbourg (ALYATEC®) was developed to fulfill two objectives: to allow standardized allergenic and non-allergenic exposures with better control of the parameters than in other EEC and to offer a place to study asthma and anti-asthmatic therapies safely.
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- 2018
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14. Pollution de l’air intérieur : analyse coût-efficacité
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F. de Blay, A. Dazy, Edouard Virot, M. Ott, N. Khayath, and C. Marcot
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Immunology and Allergy - Published
- 2019
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15. Caractéristiques et parcours de soins des patients admis au service d’accueil des urgences du centre hospitalier universitaire de Strasbourg pour exacerbation d’asthme en 2018
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D. Fabbro, N. Khayath, F. De Blay, and T. Fabacher
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Pulmonary and Respiratory Medicine - Published
- 2022
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16. Développement d’un carnet de suivi et d’éducation thérapeutique des patients asthmatiques
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F. de Blay, A. Vetter, V. Lefebvre, N. Khayath, Carine Metz-Favre, M. Bulber, T. Mislin, and A. Dory
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Immunology and Allergy - Abstract
Introduction Chez les patients asthmatiques les plus severes, l’anamnese des exacerbations et des modifications therapeutiques peut etre complexe et rend l’evaluation des mesures entreprises imprecise. Methodes Notre equipe d’ETP a cree un carnet de suivi comportant un volet d’information sur la physiopathologie, les traitements, l’autoevaluation (DEP, ACT, ACQ) de l’asthme. Un calendrier des symptomes et des prises medicamenteuses, des fiches synthetiques de modifications therapeutiques reserves aux medecins et enfin un suivi des injections des biotherapies, y ont ete integres. Nous nous sommes interesses a l’interet que les patients portent a ce carnet. Un questionnaire valide par l’HAS a ete adapte et soumis a 25 patients comportant 29 questions, reparties en 4 categories : l’ergonomie du carnet, son utilite dans le cadre de l’education therapeutique, la regularite de son utilisation et enfin l’usage fait par les medecins traitants. Resultats Apres une periode d’un mois, 14 patients ont repondu au questionnaire dont 8 hommes d’âge median 43,7 ans (18–73). En moyenne, ils ont eu 4 visites en 2020 et consultent le service depuis 5,9 ans (1–16). 11 d’entre eux sont allergiques, la severite de leur asthme s’echelonne de GINA 3 a 5. Huit sont traites par des biotherapies. Trois carnets n’ont pu etre evalues du fait de la barriere linguistique et 8 doivent encore l’etre. L’ergonomie du carnet a ete validee par 89 % des patients. Les connaissances de l’asthme ont ete ameliorees pour 74 % d’entre eux. Cinquante pour cent indiquent utiliser les outils proposes. Seuls 3 patients ont presente le carnet au medecin traitant durant ce mois d’essai, qui a ete juge utile pour 2 d’entre eux. Conclusion Les patients ont souligne l’ergonomie du carnet et son interet pedagogique. Forts des premiers constats, nous avons ameliore certains points, cree un carnet specifique pour les patients presentant une barriere linguistique et decide de remettre ce carnet au cours d’une seance d’ETP. Une version informatique est envisagee. Nos resultats concernant l’utilisation par les medecins traitants sont limites et necessiteront une etude sur une population plus large et une periode plus etendue.
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- 2021
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17. Asthma and Cleaning: What’s New?
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C. Donnay, Carole Ederle, Marie Mielcarek, Frédéric de Blay, and N. Khayath
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Cleaning agent ,education.field_of_study ,Allergy ,business.industry ,Population ,Medicine (miscellaneous) ,Disease ,medicine.disease ,030210 environmental & occupational health ,Uncontrolled asthma ,03 medical and health sciences ,0302 clinical medicine ,Increased risk ,030228 respiratory system ,Environmental health ,Immunology and Allergy ,Social consequence ,Medicine ,education ,business ,Asthma - Abstract
Professional and domestic cleanings are associated with work-related asthma (WRA). Increased risk of asthma has been shown in many epidemiological and surveillance studies, and several case reports describe the relationship between exposure to one or more cleaning agents and WRA. Moreover, exposure to cleaning chemicals could be associated with severe uncontrolled asthma. Cleaning sprays, bleach, ammonia, disinfectants, mixing products, and specific job tasks have been identified as specific causes and/or triggers of asthma or airway respiratory diseases. Their measurements at the workplace could be interesting but hardly feasible. It is still under controversy whether cleaning products are airway irritants or sensitizers. The social consequence of unemployment in this population is one of the most important limitations to the management of occupational in cleaning professionals. The prognosis of the disease depends of removal from exposure, with avoidance of high-risk cleaning products, even at home.
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- 2018
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18. L’asthme allergique à l’huile essentielle de menthe poivrée : une allergie peut-être pas assez connue ?
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L.A. Essari, C. Delmas, L. Guenard, N. Khayath, and F. de Blay
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Immunology and Allergy - Published
- 2017
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19. Mitochondrial Function in Peripheral Blood Mononuclear Cells (PBMC) Is Enhanced, Together with Increased Reactive Oxygen Species, in Severe Asthmatic Patients in Exacerbation
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Carole Ederle, Emmanuel Andrès, A. Poirot, Anne-Laure Charles, Frédéric de Blay, Bernard Geny, Raphaël Clere-Jehl, Alain Meyer, and N. Khayath
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Endotype ,Exacerbation ,lcsh:Medicine ,Mitochondrion ,medicine.disease_cause ,Peripheral blood mononuclear cell ,Article ,03 medical and health sciences ,0302 clinical medicine ,Immune system ,exacerbation ,mitochondrial function ,pbmc ,Medicine ,030304 developmental biology ,chemistry.chemical_classification ,reactive oxygen species ,0303 health sciences ,Reactive oxygen species ,business.industry ,lcsh:R ,General Medicine ,asthma ,respiratory tract diseases ,Mitochondrial respiratory chain ,030228 respiratory system ,chemistry ,Immunology ,business ,Oxidative stress - Abstract
asthma is a chronic inflammatory lung syndrome with an increasing prevalence and a rare but significant risk of death. Its pathophysiology is complex, and therefore we investigated at the systemic level a potential implication of oxidative stress and of peripheral blood mononuclear cells&rsquo, (PBMC) mitochondrial function. Twenty severe asthmatic patients with severe exacerbation (GINA 4&ndash, 5) and 20 healthy volunteers participated at the study. Mitochondrial respiratory chain complexes activities using different substrates and reactive oxygen species (ROS) production were determined in both groups by high-resolution respirometry and electronic paramagnetic resonance, respectively. Healthy PBMC were also incubated with a pool of plasma of severe asthmatics or healthy controls. Mitochondrial respiratory chain complexes activity (+52.45%, p = 0.015 for VADP) and ROS production (+34.3%, p = 0.02) were increased in asthmatic patients. Increased ROS did not originate mainly from mitochondria. Plasma of severe asthmatics significantly increased healthy PBMC mitochondrial dioxygen consumption (+56.8%, p = 0.031). In conclusion, such asthma endotype, characterized by increased PMBCs mitochondrial oxidative capacity and ROS production likely related to a plasma constituent, may reflect activation of the immune system. Further studies are needed to determine whether increased PBMC mitochondrial respiration might have protective effects, opening thus new therapeutic approaches.
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- 2019
20. L’exposition aux acariens en CEE induit une augmentation des Treg CCR4+ dans l’asthme allergique, quelle que soit la réponse asthmatique
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Nathalie Domis, C.A. Poirot, Myriam Maumy-Bertrand, N. Khayath, F. de Blay, and Virginie Doyen
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Immunology and Allergy - Abstract
Introduction Les lymphocytes T regulateurs (Treg) jouent un role important dans le controle de la phase effectrice asthmatique. Il a ete montre qu’ils etaient diminues au niveau pulmonaire chez les sujets qui presentaient une reponse duale suggerant un defaut de recrutement. Le but etait de mesurer les TregCCR4+ et les ligands de CCR4 (CCL17, CCL22) dans un modele d’asthme allergique au Dpt. Methodes Vingt sujets presentant un asthme GINA 1 allergiques au Dpt ont ete exposes au Dpt et a une solution placebo dans une chambre d’exposition environnementale (CEE, Alyatec®). La reponse immediate (chute de 20 % du VEMS) et la reponse retardee (chute de 15 %) etaient mesurees. Un prelevement sanguin a ete obtenu a T0 et 6 h apres expositions. Les Treg (CD4 + CD25 + FoxP3 + ) et CCR4 ont ete mesures par cytometrie en flux (FACSAria®) et CCL17, CCL22, IL2 et IL5 par electro-chemiluminescence (MSD Mesoscale®). Resultats Treize sujets ont presente une reponse duale (D), 4 une reponse immediate isolee (A) et 3 n’ont pas eu d’asthme (N). A T0, les Treg CCR4+ (%Treg et %CD4) etaient plus eleves dans le groupe D vs A et N (p Discussion Les asthmatiques qui presentent une reponse duale apres exposition au Dpt avaient un taux plus eleve de Treg CCR4+ a l’etat basal compares a ceux qui avait une reponse immediate isolee ou pas d’asthme. L’exposition au Dpt entrainait une augmentation des Treg CCR4+ a 6 h mais cette augmentation n’etait pas differente selon la reponse asthmatique. Les ligands de CCR4 n’etaient pas majores apres exposition allergenique, par contre, on observait une augmentation de l’IL2 et de l’IL5. Conclusion L’exposition au Dpt dans l’asthme allergique entraine une augmentation des Treg CCR4+, de l’IL5 et de l’IL2 quelle que soit la reponse asthmatique. Les TregCCR4+ sont positivement correles a l’IL2 suggerant des mecanismes physiopathologiques communs.
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- 2021
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21. Bronchopneumopathie chronique obstructive (BPCO) et environnement intérieur
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S. Qi, F. De Blay, and N. Khayath
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Pulmonary and Respiratory Medicine ,03 medical and health sciences ,0302 clinical medicine ,Domestic environment ,030228 respiratory system ,Political science ,030212 general & internal medicine ,Humanities - Abstract
Resume Introduction Le risque attribuable au tabagisme dans la bronchopneumopathie chronique obstructive (BPCO) est tres variable selon les etudes. Ce qui signifie que le risque de BPCO chez les non-fumeurs n’est pas negligeable. Les liens entre les polluants de l’environnement interieur et la BPCO sont differents dans les pays en voie de developpement et ceux developpes. Etat des connaissances Dans les pays en voie de developpement, de nombreux travaux ont demontre un lien entre l’exposition aux substances liees a la combustion de la biomasse et l’apparition de la BPCO particulierement chez la femme dont l’exposition est la plus importante. Cependant, la relation de cause a effet n’a toujours pas ete demontree. Dans les pays developpes, il n’y pas d’arguments demontrant le role de l’exposition aux polluants interieurs domestiques dans la genese de la BPCO et les polluants interieurs tels que le NO 2 ou les particules fines sembleraient participer uniquement a l’aggravation de BPCO deja existante. Conclusion D’autres etudes sont necessaires pour evaluer leur role dans la BPCO et explorer les mecanismes sous-jacents. Des phenomenes irritatifs pourraient etre evoques.
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- 2016
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22. EEC exposure to mite in allergic asthma induces an increase of function and recruitment molecules on blood Treg
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A. Poirot, Nathalie Domis, Myriam Maumy-Bertrand, Francis Corazza, Virginie Doyen, Frédéric de Blay, and N. Khayath
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biology ,business.industry ,Immunology ,Mite ,Immunology and Allergy ,Medicine ,Allergic asthma ,biology.organism_classification ,business ,Function (biology) - Published
- 2021
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23. Étude de la réponse T régulatrice dans l’asthme allergique aux acariens après exposition allergénique
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F. de Blay, Audrey Jacob, M. Maumy-Betrand, N. Khayath, A. Poirot, Francis Corazza, Virginie Doyen, and Nathalie Domis
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Immunology and Allergy - Abstract
Introduction Les lymphocytes T regulateurs (Treg) jouent un role important dans le controle de la reaction inflammatoire asthmatique. Le but du travail est de les caracteriser au cours de la reponse asthmatique allergique au Dermatophagoides pt. (Dpt). Methodes 20 sujets asthmatiques legers, allergiques au Dpt ont ete exposes a un extrait Dpt (46 ng/m3 Der p1, ALK-Abello®) et a un placebo (Pcb) dans une chambre d’exposition (Alyatec®). Les reponses immediate et retardee etaient mesurees. Un prelevement sanguin etait obtenu a T0 et 6 h apres expositions. Les Treg (CD4CD25FoxP3) et certaines molecules effectrices (ICOS, PD1, CCR4 et CD39) etaient mesures par cytometrie en flux (FACSAria®). Les donnees ont ete analysees par analyses de la variance a mesures repetees avec le logiciel libre R, version 3.6.2. Une correlation lineaire avec la PD20 metacholine a ete recherchee (coefficient de Bravais-Pearson). Resultats 13 sujets ont presente une reponse duale (D), 4 une reponse immediate isolee (A) et 3 n’ont pas eu d’asthme (N). L’analyse statistique a pu etre realisee sur 18 sujets (17 pour CCR4). Apres exposition au Dpt, il n’y avait pas de modification des Treg ni d’ICOS et PD1. Par contre, il y avait une augmentation des CD39+ ( % Treg, p Discussion L’exposition au Dpt entraine une augmentation des Treg CD39+ et CCR4+ a 6 h. L’augmentation des CD39+ est differente selon la reponse asthmatique suggerant un role de ces cellules dans son controle. Ceci est renforce par la relation entre les Treg CD39+ et l’hyperreactivite bronchique non specifique. Conclusion L’exposition aux Dpt dans l’asthme entraine une augmentation des Treg ayant des caracteristiques suppressives (CD39) ou impliques dans leur migration pulmonaire (CCR4) et limitant l’inflammation bronchique allergique.
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- 2020
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24. [Diagnosis of allergy in asthma]
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V, Doyen, A, Casset, A, Divaret-Chauveau, N, Khayath, G, Peiffer, P, Bonniaud, J-C, Dalphin, and F, De Blay
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Hypersensitivity ,Humans ,Allergens ,Immunoglobulin E ,Asthma ,Bronchial Provocation Tests ,Skin Tests - Abstract
Allergy is a hypersensitivity reaction induced by immunological mechanisms. In asthma, allergy has a complex role and is usually IgE mediated. Allergy must be evaluated during the work up but evidence of IgE sensitivity does not mean that allergens play a role in the pathophysiology of the disease. The clinical relevance of the sensitivity has to be considered. This paper describes current available tools to screen for IgE sensitivity, allergen exposure and their role in asthma.
- Published
- 2018
25. VALIDATION CLINIQUE DE LA CHAMBRE D'EXPOSITION ENVIRONNEMENTALE DE STRASBOURG (ALYATEC®) CHEZ DES SUJETS ASTHMATIQUES ALLERGIQUES AUX ACARIENS
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I. CHOUAL, C. RADU, N. KHAYATH, N. BECK, F. SCHOETTEL, A. JACOB, N. DOMIS, and F. DE BLAY
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chambre d'exposition environnementale ,aérosol ,Effets sur la santé des aérosols ,mite allergens ,Environmental Exposure Chamber ,allergènes d'acarien ,asthma ,asthme - Abstract
La validation clinique de la chambre d'exposition de Strasbourg avec les allergènes d'acariens nous a permis de démontrer l'effet clinique de l'exposition avec des sujets asthmatiques allergiques aux acariens. Une réponse bronchique immédiate et retardée a été observée chez plus de 60% des sujets avec les concentrations d'allergènes Derp1 testées. La spécificité a également été vérifiée. L'efficacité des médicaments anti-asthmatiques pourrait être testée dans ce modèles, par leur capacité à bloquer la réponse bronchique retardée., The clinical validation of the Environmental Exposure Chamber (EEC) of Strasbourg (ALYATEC®) with mite in asthmatic subjects allergic to mite has demonstrated clinical effect of exposure. Early and late phase reaction in more than 60% of subjects have been observed with the concentrations of Der p1 tested. Specificity of exposure has also been verified. Efficacy of anti-asthmatic drugs can be evaluated in this model through its capacity to block late phase reaction.
- Published
- 2018
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26. VALIDATION TECHNIQUE DE LA CHAMBRE D'EXPOSITION ENVIRONNEMENTALE DE STRASBOURG (ALYATEC®)
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N. DOMIS, I. CHOUAL, C. RADU, N. KHAYATH, N. BECK, L. VECELLIO, and F. DE BLAY
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chambre d'exposition environnementale ,aérosol ,Environmental Exposure Chamber ,allergènes ,allergens ,Métrologie des aérosols - Abstract
La Chambre d'exposition Environnementale (CEE) de Strasbourg (ALYATEC®) permet d'avoir un contrôle strict des paramètres environnementaux (température, humidité relative et flux d'air) ainsi que de la taille, du nombre de particules et de la concentration aérienne d'allergène. Elle a été validée avec différentes concentrations d'allergène Der p1 et a montré une excellente reproductibilité pour ces différents paramètres environnementaux. Les coefficients de variation (CV) intra-essai et inter-essai de la concentration aérienne de Der p1 sont inférieurs à 30% et bien meilleur que ceux des autres chambres., The Environmental Exposure Chamber (EEC) of Strasbourg (ALYATEC®) allows to have a strict control of environmental parameters (temperature, relative humidity, ventilation rate) as well as number, size particles and allergens concentration. It has been validated with different concentrations of Der p1 allergen and has shown an excellent reproducibility for these different environmental parameters. The intra and inter-assay CV of the Der p1 airborne concentration were lower than 30% and much better than the one obtained in other EEC chambers.
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- 2018
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27. Clinical validation of Environmental Exposure Chamber in Strasbourg (ALYATEC®) with mite in asthmatic patients
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Nicole Beck, S. Jilani, C. Radu, Nathalie Domis, N. Khayath, Ibrahim Choual, Frédéric de Blay, and Sebastien Smet
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biology ,business.industry ,Immunology ,Mite ,Medicine ,Asthmatic patient ,Environmental exposure ,biology.organism_classification ,business - Published
- 2017
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28. Technical qualification of the Environmental Exposure Chamber of Strasbourg (ALYATEC®)
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C. Radu, Sebastien Smet, Nicole Beck, Nathalie Domis, S. Jilani, Frédéric de Blay, N. Khayath, and Ibrahim Choual
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Reproducibility ,Chromatography ,business.industry ,Environmental exposure ,University hospital ,law.invention ,stomatognathic diseases ,Nebulizer ,law ,Ventilation (architecture) ,Medicine ,Asthmatic patient ,Relative humidity ,Particle size ,business - Abstract
Aims: To validate the technical parameters of ALYATEC9s EEC with mite allergens. Method: The EEC is a 147 m3 chamber, located into the University Hospital of Strasbourg close to the intensive care unit. Its characteristics is that maximum parameters are controlled: temperature, relative humidity, ventilation rate, number and size particles, concentration of Der p 1 and VOC. Mite allergen extracts (ALK® and Stallergenes®) were nebulized through a nebulizer (SinapTec®, France).Der p1 concentrations were sampled using 5 glass fiber filters and measured with an ELISA Assay (Indoor biotechnology®, USA).Particles number and size were monitored online during nebulization, using 10 particles counters distributed inside the EEC. The cleaning process was also controlled and validated. Results: The reproducibility was excellent for the temperature, relative humidity and airflow. 3 concentrations of Der p1 were measured: 63, 76, 105 ng/m3 (n=45). For the 3 concentrations, the CV intrassay of Der p1 was 22±1.3%, interassay was less than 30%. For the particle size 0.5-5 and 5-10 µm, the CV interassay was 8 and 13%, respectively (n=19). The CV of the MMAD was 2.2% (n=10). No measurable airborne Der p1 was detected in the toilets and the medical supervision room (n=6) neither in the EEC 10 minutes after the end of exposure (n=9). No airborne VOC was measured in the EEC and the other rooms of the clinical unit (n=10). Conclusion: ALYATEC’s EEC is a 2nd generation chamber with high controlled and reproducible allergenic and non-allergenic exposure. The interassay CV obtained is better than in other EEC. Its close location to an intensive care unit makes it very safe especially for clinical research in asthmatic patients.
- Published
- 2017
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29. Effet de l’omalizumab dans l’aspergillose bronchopulmonaire allergique : à propos de 10 patients asthmatiques
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F. De Blay, L. Melscoet, and N. Khayath
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Pulmonary and Respiratory Medicine ,03 medical and health sciences ,0302 clinical medicine ,030228 respiratory system ,Immunology and Allergy ,030212 general & internal medicine - Abstract
Resume Introduction Le traitement de l’aspergillose broncho-pulmonaire allergique (ABPA) repose sur la corticotherapie orale, neanmoins elle entraine des effets secondaires. L’efficacite de l’omalizumab (anticorps monoclonal anti-IgE), a ete rapportee dans des series de cas cliniques, en permettant une epargne cortisonique. But Evaluer l’effet de l’omalizumab chez des patientsatteints d'ABPA, suivis au sein du pole de pathologie thoracique des hopitaux universitaires de Strasbourg. Methodes Il s’agit d’une etude retrospective et monocentrique. L’evaluation de l’efficacite de l’omalizumab a ete faite a 6 et 12 mois de traitement et portait sur le controle de l’asthme selon GINA 2018, le taux annuel d’exacerbations severes, la pression therapeutique et la fonction respiratoire. Resultats Dix patients ont ete inclus. A l’inclusion, le taux median annuel d’exacerbations etait de 5,5 [0–13]. Apres 6 mois de traitement, le taux median annuel d’exacerbations etait de 2 [0–14], la corticotherapie systemique a ete arretee chez 5/8 (62,5 %) des patients et le controle de l’asthme a ete obtenu chez 5/10 (50 %) des patients. Cependant, au 12e mois, 60 % des patients ont arrete l’omalizumab notamment en raison de l’absence de controle de l’asthme. Sur les 40 % des patients ayant poursuivi l’omalizumab au-dela de la premiere annee, le controle de l’asthme a ete obtenu dans 100 % des cas, le taux median d’exacerbations etait nul et aucun d’entre eux ne beneficiait d’une corticotherapie orale a 6 et 12 mois. Conclusion L’omalizumab a permis une epargne cortisonique dans l’ABPA, en reduisant les exacerbations severes et la corticotherapie orale.
- Published
- 2019
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30. Analyse rétrospective du phénotype des patients asthmatiques suivis au CHU de Strasbourg, basée sur l’exploration de la formule leucocytaire des expectorations induites
- Author
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C. Marcot, N. Khayath, and F. de Blay
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Pulmonary and Respiratory Medicine ,Immunology and Allergy - Abstract
Introduction Nous avons repertorie les caracteristiques de tous les patients asthmatiques ayant consulte au service d’allergologie de Strasbourg en se basant sur les endotypes inflammatoires definis les expectorations induites. Methodes Etude monocentrique, retrospective avec 156 patients asthmatiques. Les caracteristiques de l’asthme, ainsi que les resultats des examens paracliniques sont repertories. Quatre endotypes inflammatoires selon les expectorations induites (mixtes (M) eosinophiliques stricts > 2 % E, neutrophiliques stricts > 61 % N et paucigranulocytiques P) sont distingues. Les analyses sont realisees dans les groupes « eosinophiliques elargis » (stricts et mixtes) et non eosinophiliques selon la presence ou non d’un terrain atopique. Resultats 59 patients avaient une inflammation bronchique eosinophilique stricte, 40 une neutrophilique stricte, 32 une mixte (> 2 % et > 61 %) et 25 une paucigranulocytique ( Conclusion Le travail souligne la necessite d’avoir plusieurs marqueurs pour caracteriser un asthme T2. Chez les patients eosinophiliques, il existe une correlation entre l’eosinophilie bronchique, sanguine et le NO exhale. L’eosinophilie bronchique etait associee a une severite accrue. L’association d’une polypose nasosinusienne, d’un âge de debut de l’asthme avance, d’un antecedent de tabagisme sevre ou d’une eosinophilie sanguine elevee est plus liee aux asthmes eosinophiliques non atopiques.
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- 2020
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31. Comparaison de l’efficacité de l’omalizumab dans l’asthme sévère atopique et non atopique
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F. De Blay, L. Melscoet, and N. Khayath
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Immunology and Allergy - Abstract
Introduction Dans l’asthme, on retrouve une production d’IgE au niveau bronchique independamment du statut atopique. L’omalizumab (anticorps monoclonal anti-IgE), a prouve son efficacite dans l’asthme severe atopique. L’objectif principal de notre travail est de comparer l’efficacite de l’omalizumab dans l’asthme severe non atopique et atopique. Methodes Nous avons mene une etude monocentrique et retrospective, ou nous avons compare l’effet de l’omalizumab chez 44 (31,7 %) asthmatiques severes non atopiques avec un groupe controle de 95 (68,3 %) asthmatiques severes atopiques. L’effet de l’omalizumab a ete evaluee a 4, 6 et 12 mois et portait sur le taux d’exacerbations severes, le controle de l’asthme selon GINA 2018, la pression therapeutique et la fonction respiratoire. Resultats A l’inclusion, les 2 populations etaient semblables, a l’exception des taux plus faibles d’IgE (p Conclusion Ces resultats suggerent que l’omalizumab est tout aussi efficace dans l’asthme severe non atopique que dans l’asthme severe atopique. L’absence de terrain atopique n’est donc pas un facteur limitant pour traiter un asthme severe par un anti-IgE. De plus, le taux d’eosinophiles ne semble pas influencer l’efficacite de l’omalizumab dans l’asthme severe atopique.
- Published
- 2019
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32. [Environmental exposure chambers (EEC): A novel tool for pathophysiological and pharmaceutical research]
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N, Khayath, C, Radu, I, Choual, S, Jilani, L, Vecellio, N, Domis, and F, De Blay
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Atmosphere Exposure Chambers ,Biomedical Research ,Pharmaceutical Research ,Humans ,Reproducibility of Results ,Environmental Exposure ,Environment, Controlled ,Rhinitis, Allergic ,Asthma ,Bronchial Provocation Tests - Abstract
Airborne allergic diseases (allergic asthma, rhinitis and conjunctivitis) have reached epidemic proportions and are a great burden for both society and individuals. Therefore we need to better understand the physiopathological mechanisms and to increase clinical research in these diseases. However, traditional outpatient studies are difficult and have number of limitations, in particular the variability of allergen exposure. Yet allergen provocation tests, especially bronchial challenges in asthma, are excellent tools to measure the efficiency of anti-allergic therapies. Environmental exposure chambers (EEC) allow the performance of controlled allergen provocation tests on a large scale with remarkable sensitivity, specificity and reproducibility. Moreover, they allow a precise collection of allergic symptoms, making them interesting tools for patho-physiological and clinical studies. During the last thirty years, they have assisted the study of anti-allergic therapies and provided data on their pharmacodynamic characteristics, particularly in allergic rhinitis. However, there are still no EEC tests centered on asthma. The EEC of Strasbourg (ALYATEC
- Published
- 2017
33. Épidémiologie des allergies alimentaires
- Author
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N. Khayath and F. de Blay
- Subjects
business.industry ,Medicine ,business - Published
- 2017
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34. [The usefulness of nasal provocation tests for respiratory physicians]
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V, Doyen, J-J, Braun, C, Lutz, N, Khayath, and F, de Blay
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Nasal Provocation Tests ,Rhinitis, Allergic, Perennial ,Predictive Value of Tests ,Pulmonary Medicine ,Humans ,Rhinitis, Allergic, Seasonal ,Allergens ,Practice Patterns, Physicians' ,Asthma ,Rhinitis ,Skin Tests - Abstract
Rhinitis and asthma are common diseases that are strongly linked from both the epidemiological and patho-physiological point of view. A precise aetiological diagnosis is required in order to optimize treatment. Nasal provocation tests (NPT) determine precisely the role of the allergen in the initiation of the symptoms of rhinitis particularly when the history does not produce convincing evidence of the clinical relevance of an allergen. It may also have important consequences for the choice of an allergenic immunotherapy. NPT are not standardized but simple methods based on international recommendations provide us with good diagnostic accuracy. In this paper, we will discuss the practical aspects of NPT as well as the clinical or research situations where they may be useful for the respiratory physician.
- Published
- 2016
35. How In Vitro Assays Contribute to Allergy Diagnosis
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N. Khayath, Frédéric de Blay, and Anne Casset
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0301 basic medicine ,Pulmonary and Respiratory Medicine ,Allergy ,Immunology ,Provocation test ,Disease ,In Vitro Techniques ,medicine.disease_cause ,Immunoglobulin E ,03 medical and health sciences ,0302 clinical medicine ,Allergen ,Hypersensitivity ,medicine ,Humans ,Immunology and Allergy ,Pollen count ,biology ,business.industry ,Technician ,Environmental exposure ,Allergens ,respiratory system ,medicine.disease ,030104 developmental biology ,030228 respiratory system ,biology.protein ,business - Abstract
Diagnosis of allergic disorders is based upon the clinical history of the disease, the immunoglobulin E (IgE) antibody response, and the allergen exposure. During the last decade, many changes have occurred in the in vitro diagnostic tests used in daily practice. The most important one is the use of allergenic molecules, which helps to define severe profile of allergy and/or to better understand cross-reactivity. The correlation between IgE sensitization and bronchial or nasal response in provocation tests is not so clear, which implies that such tests are still helpful in allergy diagnosis. In order to strengthen the link between a real allergen exposure and allergic symptoms, environmental allergen load assessment can be performed. For clinicians, it appears obvious to know the pollen count to treat their patients; however, they rarely measure the allergen load in the indoor environment, while nowadays home-tests (semi-quantitative or quantitative) make the assessment very easy. In the future, assessment of the environmental exposure (preferably with an indoor technician) of an allergic patient should take into account not only the allergens but also the other indoor pollutants, which could enhance respiratory symptoms in allergic patients.
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- 2016
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36. Validation technique de la chambre d’exposition environnementale de Strasbourg (Alyatec ® )
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N. Khayath, C. Radu, C. Ibrahim, S. Jilani, N. Beck, S. Smet, F. Schoettel, N. Domis, and F. De Blay
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Pulmonary and Respiratory Medicine - Published
- 2018
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37. Que peut-on attendre de l’éviction vis-à-vis des acariens ?
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M. Ott, N. Khayath, and F. de Blay
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0301 basic medicine ,Allergy ,Eviction ,business.industry ,Allergen avoidance ,medicine.disease ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,030228 respiratory system ,Immunology ,medicine ,Immunology and Allergy ,business - Published
- 2017
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38. Validation technique de la Chambre d’Exposition Environnementale de Strasbourg (Alyatec ® )
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Sebastien Smet, Nicole Beck, N. Khayath, S. Jilani, C. Radu, Ibrahim Choual, F. de Blay, and Nathalie Domis
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Immunology and Allergy - Abstract
Introduction L’objectif de cette etude est de valider les differents parametres d’exposition avec l’allergene Der p1, dans la Chambre d’Exposition Environnementale (CEE) de Strasbourg (Alyatec®). Methodes La CEE de Strasbourg est localisee au sein du Nouvel hopital universitaire de Strasbourg a moins de 5 minutes d’un service de reanimation. La salle d’exposition fait 147 m3 et peut accueillir 20 personnes. Une des caracteristiques de cette CEE est le controle strict des parametres environnementaux (temperature, humidite relative et flux d’air) ainsi que la taille, le nombre de particules et la concentration aerienne d’allergene. Des extraits de l’allergene majeur d’acariens Der p1 (ALK® et/ou Stallergenes®) ont ete nebulises (SinapTec®, France) et la concentration aerienne de Der p1 mesuree a l’aide de 5 filtres collecteurs par technique ELISA (Indoor biotechnology® Charlottesville, USA). Le nombre et la taille des particules ont ete mesures en continu durant la nebulisation a l’aide de 10 compteurs de particules distribues au sein de la piece d’exposition (LightHouse, CA, USA). Le processus de nettoyage du dispositif etait egalement controle et valide. Resultats La reproductibilite etait excellente pour la temperature, l’humidite relative et le taux de renouvellement d’air dans la salle d’exposition. Trois concentrations de Der p1 ont ete nebulisees : 63, 76, 105 ng/m3 (n = 45). Pour ces trois concentrations, le coefficient de variation (CV) intra-essai de la concentration aerienne de Der p1 etait de 22 ± 1,3 %, le CV inter-essai de moins de 30 %. Pour les particules de 0,5–5 et de 5–10 μm, le CV inter-essai etait de 8 et 13 %, respectivement (n = 19). Le CV du diametre aerodynamique median massique des particules nebulisees etait de 2,2 % (n = 10). Dix minutes apres l’exposition (n = 9), la concentration de Der p1 mesuree etait nulle ainsi que les COV mesures dans toutes les pieces (n = 10). Conclusion La CEE de Strasbourg (Alyatec®) est une chambre d’exposition de 2e generation permettant un controle optimal et reproductible de l’exposition allergenique et non allergenique. Sa localisation a moins de 5 minutes d’un service de reanimation en fait un outil sur en particulier pour la recherche clinique dans l’asthme.
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- 2017
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39. Comparaison de l’efficacité de l’omalizumab dans l’asthme sévère atopique et non atopique : expérience Strasbourgeoise
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F. De Blay, L. Melscoet, Nicolas Meyer, N. Khayath, and M.A. Goltzene
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Pulmonary and Respiratory Medicine - Abstract
Introduction Dans l’asthme, il est retrouve une production d’IgE au niveau bronchique independamment du statut atopique. L’omalizumab (anticorps monoclonal anti-IgE), a prouve son efficacite dans l’asthme severe atopique. L’objectif principal est de comparer l’efficacite de l’omalizumab dans l’asthme severe non atopique et atopique. Methodes Il s’agit d’une etude monocentrique et retrospective. Nous avons compare l’effet de l’omalizumab chez 44 (31,7 %) asthmatiques severes non atopiques avec un groupe controle de 95 (68,3 %) asthmatiques severes atopiques. L’evaluation de l’omalizumab a ete faite a 4, 6 et 12 mois et portait sur le taux d’exacerbations severes, le controle de l’asthme selon GINA 2018, la posologie corticotherapie inhalee, la proportion de patients corticodependants et la fonction respiratoire. Resultats A l’inclusion, les 2 populations etaient semblables, a l’exception des taux plus faibles d’IgE (p Conclusion Ces resultats suggerent que l’omalizumab est aussi efficace dans l’asthme severe non atopique que dans l’asthme severe atopique. Le taux d’eosinophiles ne semble pas influencer l’efficacite de l’omalizumab dans l’asthme severe atopique.
- Published
- 2019
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40. Comparaison de la réponse bronchique vis-à-vis des allergènes d’acariens et de chat dans la chambre d’exposition environnementale (EEC) ALYATEC ®
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Florian Schoettel, A. Gherasim, F. De Blay, Nicole Beck, Nathalie Domis, Audrey Jacob, N. Khayath, and Ibrahim Choual
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Immunology and Allergy - Abstract
Introduction La reponse retardee est un bon modele d’asthme. Il a ete montre dans la litterature, lors de tests de provocation individuels que l’allergene d’acarien induit plus de reponses retardees que l’allergene de chat1. L’objectif de cette etude est de comparer la frequence des reponses retardees (RR) chez les sujets asthmatiques allergiques aux acariens par rapport aux asthmatiques allergiques aux chats. Methodes Vingt-quatre sujets asthmatiques allergiques aux acariens ont ete compares a 21 sujets asthmatiques et allergiques au chat (GINA 1 ou 2). Les sujets presentaient des prick-tests ≥ 5 mm par rapport aux temoins positifs et des IgE specifiques ≥ 0,70 KU/L. La dose choisie pour l’allergene d’acarien et de chat correspondait a la concentration d’allergene induisant le plus de reponses immediates (RI) et retardees (RR) chez les sujets exposes dans la chambre environnementale ALYATEC®. Resultats La frequence d’apparition de la RR pour les acariens etait de 66,6 % et 20 % pour l’allergene de chat (p = 0,007). La frequence de la RI pour les acariens etait de 78,2 %, de 91,3 % pour la RI ou RR, et de 50 % pour la RI et RR. Avec l’allergene de chat, 50 % des sujets ont obtenu une RI ; 60 % une RI ou RR, et 25 % ont obtenu une RI et RR. Aucune difference significative n’a ete observee, entre l’allergene de chat et d’acarien, concernant la severite de la reponse bronchique et le temps necessaire a l’obtention de la chute du VEMS. Conclusion La frequence de la RR chez les sujets asthmatiques allergiques aux acariens exposes dans la chambre environnementale ALYATEC® est superieure a celles des sujets sensibilises aux allergenes de chat. Nos resultats confirment ceux obtenus lors de tests de provocation individuels. Il semblerait que le modele acarien soit plus interessant dans l’etude de l’asthme.
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- 2018
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41. Validation clinique de la chambre d’exposition environnementale (CEE) de Strasbourg (ALYATEC ® ) chez des sujets asthmatiques allergiques au chat
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Ibrahim Choual, Nathalie Domis, F. De Blay, Audrey Jacob, Florian Schoettel, A. Gherasim, N. Khayath, and Nicole Beck
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Immunology and Allergy - Abstract
Introduction Il a ete montre que les CEE un bon modele pour explorer la physiopathologie des maladies allergiques respiratoires et leurs traitements. L’objectif de cette etude est de valider la CEE ALYATEC ® en determinant la concentration aerienne de Fel d1 induisant une reponse immediate (RI) ou retardee (RR) chez au moins 50 % de sujets asthmatiques allergiques au chat. Methodes Il s’agit d’une etude randomisee, en double aveugle, en chasse-croise comprenant le groupe A : 20 sujets asthmatiques allergiques au chat. Le groupe B : 10 sujets asthmatiques allergiques a un autre allergene a ete selectionne pour apprecier la specificite de l’exposition. Tous les sujets ont d’abord ete exposes au placebo. Le groupe A a ete expose a deux concentrations aeriennes de Fel d1. Le nombre et la taille des particules ont ete enregistres en continu pendant toute l’exposition. Le groupe B a ete expose a la concentration de Fel d1 ayant permis de repondre a l’objectif de l’etude. Resultats L’âge moyen des sujets etait de 29 ans (± 8). Pour les 2 concentrations de Fel d1 nous avons obtenu plus de 50 % de RI et/ou de RR. Le temps moyen necessaire pour obtenir un RI etait de 59,7 ± 8 min et 138,6 ± 90 min pour la RR. La chute moyenne du VEMS au cours de la RI et de la RR etait de −29,22 % et de −17,64 % respectivement. Nous n’avons pas observe de reaction severe. Aucun sujet du groupe B n’a presente de symptomes pendant l’exposition. Conclusion Nous avons valide la CEE d’ALYATEC ® chez des sujets asthmatiques sensibilises au chat. Nous avons egalement demontre sa specificite. Cela represente une etape importante pour les futures etudes cliniques sur les traitements asthmatiques.
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- 2018
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42. [Chronic obstructive pulmonary disease (COPD) and the interior environment]
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N, Khayath, S, Qi, and F, de Blay
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Male ,Pulmonary Disease, Chronic Obstructive ,Risk Factors ,Air Pollution, Indoor ,Smoking ,Humans ,Female ,Environment - Abstract
In COPD, the risk attributable to smoking is very variable according to published studies. A significant number shows that the risk of COPD in non-smokers is far from negligible. The links between COPD and pollution of the interior environment vary between developed and developing countries.In developing countries, numerous studies have shown a link between COPD and exposure to substances derived from the combustion of biomass fuels, particularly in women where the exposure is the greatest. Nevertheless, a cause and effect relationship has not always been demonstrated. In developed countries, there is no evidence of a role of exposure to domestic interior pollution in the genesis of COPD and interior pollutants such as NOFurther studies are necessary to evaluate their role in COPD and explore the underlying mechanisms. Irritative phenomena could be involved.
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- 2015
43. Comparison of symptoms during a conjunctival provocation test (CPT) and a controlled exposure to birch pollen in the Strasbourg Environmental Exposure Chamber (EEC) ( ALYATEC)
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Audrey Jacob, N. Khayath, Nicole Beck, Frédéric de Blay, Florian Schoettel, Ibrahim Choual, C. Radu, and Nathalie Domis
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medicine.medical_specialty ,Birch pollen ,010504 meteorology & atmospheric sciences ,business.industry ,Immunology ,medicine ,Immunology and Allergy ,Environmental exposure ,business ,01 natural sciences ,Dermatology ,Conjunctival provocation test ,0105 earth and related environmental sciences - Published
- 2018
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44. Clinical validation of Environmental Exposure Chamber in Strasbourg (ALYATEC®)with cat in asthmatic patients
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Nathalie Domis, Florian Schoettel, C. Radu, Frédéric de Blay, Ibrahim Choual, Audrey Jacob, N. Khayath, and Nicole Beck
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medicine.medical_specialty ,business.industry ,Internal medicine ,Immunology ,Immunology and Allergy ,Asthmatic patient ,Medicine ,Environmental exposure ,business - Published
- 2018
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45. Validation clinique de la chambre d’exposition environnementale de Strasbourg (ALYATEC ® ) chez des patients asthmatiques allergiques aux acariens
- Author
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F. de Blay, Sebastien Smet, Nicole Beck, N. Khayath, C. Radu, Ibrahim Choual, Nathalie Domis, and S. Jilani
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Pulmonary and Respiratory Medicine ,Immunology and Allergy - Abstract
Introduction Comme l’a recommande recemment le groupe de travail sur les chambres d’exposition environnementale (CEE), les expositions allergeniques et non allergeniques doivent etre mieux controlees. C’est l’un des atouts de la nouvelle CEE de Strasbourg. L’objectif de cette etude est de valider la CEE de Strasbourg en determinant la concentration aerienne de Der p1 qui induit 60 % des reactions bronchiques immediates (RI) et/ou retardees (RR) chez des patients asthmatiques allergiques aux acariens. Methodes Il s’agit d’une etude monocentrique, randomisee, chassee croisee, en double insu. Quarante-quatre patients asthmatiques (GINA 1) divises en 2 groupes : groupe A : 24 patients asthmatiques, associe a une rhinite et/ou une conjonctivite allergique aux acariens ; groupe B : 20 patients asthmatiques, associe a une rhinite et/ou une conjonctivite allergique, non sensibilises aux acariens. Tous les patients ont d’abord ete expose au placebo. Le groupe A a ensuite ete expose de facon aleatoire a 3 concentrations aeriennes de Der p 1 : 63, 76 et 105 ng/m3 (n = 45). Le nombre de particules aeriennes ainsi que leur taille ont egalement ete enregistres en continu pendant l’exposition (n = 90). Le groupe B a ete expose a la concentration de Der p1 correspondant a l’objectif de l’etude et determine apres analyse statistique. Resultats L’âge moyen des patients etait de 28,2 ans (± 7,2). Pour les 3 concentrations aeriennes de Der p1, nous avons obtenu plus de 67 % de reponses retardees. Le temps moyen necessaire pour obtenir une reaction immediate etait de 78,6 ± 56 minutes (n = 69) et de 304,2 ± 115 minutes pour la reponse retardee (n = 44). La dose optimale etait de 70 ng/m3 permettant d’obtenir 100 % de RI et/ou RR. La chute moyenne du VEMS lors d’une RI etait de 24,53 % et de 18,90 % lors d’une RR. Aucun evenement indesirable grave n’a ete observe dans cette etude. Aucun patient du groupe B n’a reagi lors de l’exposition. Conclusion Nous avons valide la CEE de Strasbourg (ALYATEC®) chez des patients asthmatiques allergiques aux acariens et verifie sa specificite. Plus de 67 % des patients selectionnes avaient une reponse retardee. Ceci represente un interet pour le developpement futur de nouvelles molecules dans l’asthme.
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- 2018
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46. Effets mitochondriaux de l’asthme sévère en exacerbation sévère sur les lymphocytes et monocytes circulants
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C. Ederle, A.L. Charles, N. Khayath, F. De Blay, and B. Geny
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Pulmonary and Respiratory Medicine - Published
- 2018
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47. Qualification of the Environmental Exposure Chamber (EEC) of Strasbourg University Hospital (ALYATEC®)
- Author
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Frederic J. De Blay, C. Radu, S. Jilani, Nicole Beck, Sebastien Smet, N. Khayath, and Nathalie Domis
- Subjects
business.industry ,Environmental health ,Immunology ,Immunology and Allergy ,Medicine ,Environmental exposure ,business ,University hospital - Published
- 2017
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48. Efficacy of bronchial thermoplasty in patients with severe asthma and frequent severe exacerbations: A randomized controlled study ✰ .
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Leroux J, Khayath N, Matau C, Marcot C, Migueres N, Barnig C, Molard A, Ochea D, Ohana M, Lefebvre F, and de Blay F
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- Adult, Aged, Female, Humans, Male, Middle Aged, Bronchoscopy methods, Disease Progression, Follow-Up Studies, Quality of Life, Severity of Illness Index, Treatment Outcome, Asthma therapy, Bronchial Thermoplasty methods
- Abstract
Background: Bronchial thermoplasty (BT) is a bronchoscopic procedure for patients with severe uncontrolled asthma, but randomized controlled studies of its efficacy in severe asthma with frequent exacerbations are lacking. The current aim was to assess BT efficacy in this patient population., Methods: Thirty patients with asthma (GINA 5) who had experienced at least four severe exacerbations in the preceding year were randomized to BT (n = 15) or control groups (n = 15). All patients had four follow-up visits over the following 15 months, corresponding to 3, 6, 9, and 12 months after the last procedure for the BT group. The primary outcome was number of exacerbations at 15 months after inclusion (i.e. 12 months after bronchial thermoplasty)., Results: All but three patients had received an asthma biologic without receiving benefit. In the year preceding enrollment, patients in the BT group had an average of five exacerbations, compared with six among controls. For patients in the BT group, oral steroid intake was 9.3 mg/d, compared with 11.0 mg/d among controls. The BT group had 1.58 fewer severe exacerbations (mean, 6.09) compared with controls (mean, 8.28) in the 12-month period after the therapy (p = 0.047). Oral steroid intake during follow-up after BT was significantly lower in the BT group (ratio vs controls: 0.61; p = 0.0002). Quality-of-life measures between inclusion and the last visit were significantly improved in the BT group, but not among controls. Few mild to moderate adverse events were reported, and all were controlled within days., Conclusion: In patients with severe asthma and frequent severe exacerbations, BT significantly decreased the rate of severe exacerbations and oral steroid intake and led to improved quality of life during the 15 months after inclusion. BT appears to offer a therapeutic option for severe asthma with frequent exacerbations., Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Pr F. De Blay reports financial support was provided by ADIRAL. Pr F. De Blay reports financial support was provided by SOS Oxygène. Pr F. De Blay reports financial support was provided by France Oxygen. Pr F. De Blay reports financial support was provided by Elivie SAS. If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024. Published by Elsevier Masson SAS.)
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- 2024
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49. Improvement of exertional dyspneoa in patients with chronic obstructive pulmonary disease and severe allergic asthma responding to omalizumab.
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Pereira S, Verhille J, Cailliau E, Bonniaud P, Devouassoux G, Fry S, Guilleminault L, Khayath N, Leroyer C, Chenivesse C, and Bautin N
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- Humans, Omalizumab therapeutic use, Treatment Outcome, Asthma complications, Asthma diagnosis, Asthma drug therapy, Hypersensitivity, Pulmonary Disease, Chronic Obstructive, Anti-Asthmatic Agents therapeutic use
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- 2023
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50. [Allergenic and chemical pollutants of indoor environments and asthma: Characterization, assessment and eviction].
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Marcot C, Migueres N, Ott M, Khayath N, and De Blay F
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- Child, Adult, Humans, Allergens analysis, Air Pollution, Indoor adverse effects, Air Pollution, Indoor analysis, Environmental Pollutants analysis, Asthma epidemiology, Asthma etiology, Asthma prevention & control, Air Pollutants adverse effects, Air Pollutants analysis
- Abstract
The environment of an asthmatic patient can contain numerous sources of pollutants that degrade the quality of indoor air and have major repercussions on the occurrence and control of asthma. Assessment and improvement of the quality of indoor air should be assigned a major role in pneumology and allergology consultations. Characterization of an asthmatic's environment entails a search for biological pollutants with mite allergens, mildew, and allergens resulting from the proximity of pets. It is important to evaluate the chemical pollution represented by exposure to volatile organic compounds, which are increasingly present in our lodgings. Active or second-hand smoking must in all circumstances be sought out and quantified. Assessment of the environment is mediated by several methods, of which the application depends not only on the pollutant sought out, but also on enzyme-linked immunosorbent assay (ELISA), which has an essential role in quantification of biological pollutants. Attempts at expulsion of the different indoor environment pollutants is mediated by indoor environment advisors, whose efforts are aimed at obtaining reliable evaluation and control of indoor air. Implemented as a form of tertiary prevention, their methods are conducive to improved asthma control, in adults as well as children., (Copyright © 2023 SPLF. Published by Elsevier Masson SAS. All rights reserved.)
- Published
- 2023
- Full Text
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