Validation of a Pathological Score for the Assessment of Bronchial Biopsies in Severe Uncontrolled Asthma : Beyond Blood Eosinophils
Cosio, Borja G. (Hospital Universitari Son Espases (Palma de Mallorca, Balears))
Shafiek, Hanaa (Alexandria University)
Iglesias, Amanda (Instituto de Salud Carlos III)
Mosteiro, Mar (Hospital Álvaro Cunqueiro (Vigo))
Gonzalez-Piñeiro, Ana (Hospital Álvaro Cunqueiro (Vigo))
Rodríguez, Marta (Hospital Universitario de Salamanca)
García-Cosío, Mónica (Hospital Universitario Ramón y Cajal (Madrid))
Busto, Eladio (Hospital Universitario Lucus Augusti (Lugo))
Martin, Javier (Hospital Universitario Puerta de Hierro Majadahonda (Madrid))
Mejías, Luis (Hospital Universitario Rey Juan Carlos (Madrid))
Benito, Amparo (Hospital Universitario Ramón y Cajal (Madrid))
López Vilaró, Laura (Institut d'Investigació Biomèdica Sant Pau)
Gómez Cobo, Cristina (Hospital Universitari Son Espases (Palma de Mallorca, Balears))
Universitat Autònoma de Barcelona

Date:	2023
Abstract:	Blood eosinophil count (BEC) is currently used as a surrogate marker of T2 inflammation in severe asthma but its relationship with tissue T2-related changes is elusive. Bronchial biopsy could add reliable information but lacks standardization. To validate a systematic assessment of the bronchial biopsy for the evaluation of severe uncontrolled asthma (SUA) by standardizing a pathological score. A systematic assessment of submucosal inflammation, tissue eosinophilic count/field (TEC), goblet cells hyperplasia, epithelial changes, basement membrane thickening, prominent airway smooth muscle and submucosal mucous glands was initially agreed and validated in representative bronchial biopsies of 12 patients with SUA by 8 independent pathologists. In a second phase, 62 patients with SUA who were divided according to BEC ≥ 300 cells/mm or less underwent bronchoscopy with bronchial biopsies and the correlations between the pathological findings and the clinical characteristics were investigated. The score yielded good agreement among pathologists regarding submucosal eosinophilia, TEC, goblet cells hyperplasia and mucosal glands (ICC = 0. 85, 0. 81, 0. 85 and 0. 87 respectively). There was a statistically significant correlation between BEC and TEC (r = 0. 393, p = 0. 005) that disappeared after correction by oral corticosteroids (OCS) use (r = 0. 170, p = 0. 307). However, there was statistically significant correlation between FeNO and TEC (r = 0. 481, p = 0. 006) that was maintained after correction to OCS use (r = 0. 419, p = 0. 021). 82. 4% of low-BEC had submucosal eosinophilia, 50% of them moderate to severe. A standardized assessment of endobronchial biopsy is feasible and could be useful for a better phenotyping of SUA especially in those receiving OCS.
Grants:	Instituto de Salud Carlos III PI19/01521
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Biologic therapy ; Bronchial biopsy ; Eosinophil ; Severe asthma
Published in:	Archivos de bronconeumologia, Vol. 59 Núm. 8 (august 2023) , p. 502-509, ISSN 1579-2129

DOI: 10.1016/j.arbres.2023.05.014
PMID: 37414638

8 p, 904.5 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Health sciences and biosciences > Institut de Recerca Sant Pau
Articles > Research articles
Articles > Published articles