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Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques

Respiratory viral infections are very important triggers of asthma exacerbation. Recent epidemiologic studies support the hypothesis that they are associated with 80 to 85 % of acute attacks of asthma in children, both in mild exacerbations, and in more severe exacerbations leading to hospital admis...

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Autores principales: Réfabert, L., De Blic, J., Scheinmann, P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Published by Elsevier Masson SAS 1996
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7144306/
https://www.ncbi.nlm.nih.gov/pubmed/32287950
http://dx.doi.org/10.1016/S0335-7457(96)80065-7
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author Réfabert, L.
De Blic, J.
Scheinmann, P.
author_facet Réfabert, L.
De Blic, J.
Scheinmann, P.
author_sort Réfabert, L.
collection PubMed
description Respiratory viral infections are very important triggers of asthma exacerbation. Recent epidemiologic studies support the hypothesis that they are associated with 80 to 85 % of acute attacks of asthma in children, both in mild exacerbations, and in more severe exacerbations leading to hospital admission. The respiratory syncytial and parainfluenza viruses are predominantly detected in infants, while rhinovirus and mycoplasma are the commonest viruses in children. The detailed mechanism of virus-induced exacerbations remains poorly understood, al though recent studies have provided evidence of increased activation of inflammatory cells in bronchial lavage. Allergic individuals, outside of periods of allergy, do not seem to have more virus-induced respiratory manifestations than nonallergic individuals. In contrast, rhinovirus infection may intensify both the immediate and late response to allergen challenge by increasing mast cell mediator release and recruitment of eosinophils in the lower airways. Human and animal studies suggest that local production of cytokines (IL4, IL8, RANTES, MIP-1a...) and the increased expression of intercellular adhesion molecule 1 (ICAM1) in asthmatic individuals, may play an important role for recruitment and activation of inflammatory cells in the airways. One hypothesis, that remains to be demonstrated, would be that in the presence of Th2 predominance, as occurs in asthma, an excess of IL4 could inhibit the development of cytotoxic CD8, NK and Th1 activity, thereby resulting in decreased IFN production, more severe allergic inflammation and less efficient viral clearance.
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spelling pubmed-71443062020-04-09 Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques Réfabert, L. De Blic, J. Scheinmann, P. Rev Fr Allergol Immunol Clin Revues Générales Respiratory viral infections are very important triggers of asthma exacerbation. Recent epidemiologic studies support the hypothesis that they are associated with 80 to 85 % of acute attacks of asthma in children, both in mild exacerbations, and in more severe exacerbations leading to hospital admission. The respiratory syncytial and parainfluenza viruses are predominantly detected in infants, while rhinovirus and mycoplasma are the commonest viruses in children. The detailed mechanism of virus-induced exacerbations remains poorly understood, al though recent studies have provided evidence of increased activation of inflammatory cells in bronchial lavage. Allergic individuals, outside of periods of allergy, do not seem to have more virus-induced respiratory manifestations than nonallergic individuals. In contrast, rhinovirus infection may intensify both the immediate and late response to allergen challenge by increasing mast cell mediator release and recruitment of eosinophils in the lower airways. Human and animal studies suggest that local production of cytokines (IL4, IL8, RANTES, MIP-1a...) and the increased expression of intercellular adhesion molecule 1 (ICAM1) in asthmatic individuals, may play an important role for recruitment and activation of inflammatory cells in the airways. One hypothesis, that remains to be demonstrated, would be that in the presence of Th2 predominance, as occurs in asthma, an excess of IL4 could inhibit the development of cytotoxic CD8, NK and Th1 activity, thereby resulting in decreased IFN production, more severe allergic inflammation and less efficient viral clearance. Published by Elsevier Masson SAS 1996-11 2005-05-16 /pmc/articles/PMC7144306/ /pubmed/32287950 http://dx.doi.org/10.1016/S0335-7457(96)80065-7 Text en Copyright © 1996 Published by Elsevier Masson SAS. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
spellingShingle Revues Générales
Réfabert, L.
De Blic, J.
Scheinmann, P.
Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title_full Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title_fullStr Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title_full_unstemmed Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title_short Infections respiratoires aiguës virales et asthme de l'enfant: Aspects épidémiologiques, immunopathologiques et thérapeutiques
title_sort infections respiratoires aiguës virales et asthme de l'enfant: aspects épidémiologiques, immunopathologiques et thérapeutiques
topic Revues Générales
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7144306/
https://www.ncbi.nlm.nih.gov/pubmed/32287950
http://dx.doi.org/10.1016/S0335-7457(96)80065-7
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