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The ageing lung under stress

Healthy ageing of the lung involves structural changes but also numerous cell-intrinsic and cell-extrinsic alterations. Among them are the age-related decline in central cellular quality control mechanisms such as redox and protein homeostasis. In this review, we would like to provide a conceptual f...

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Autores principales: Korfei, Martina, MacKenzie, BreAnne, Meiners, Silke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: European Respiratory Society 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9488634/
https://www.ncbi.nlm.nih.gov/pubmed/32641389
http://dx.doi.org/10.1183/16000617.0126-2020
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author Korfei, Martina
MacKenzie, BreAnne
Meiners, Silke
author_facet Korfei, Martina
MacKenzie, BreAnne
Meiners, Silke
author_sort Korfei, Martina
collection PubMed
description Healthy ageing of the lung involves structural changes but also numerous cell-intrinsic and cell-extrinsic alterations. Among them are the age-related decline in central cellular quality control mechanisms such as redox and protein homeostasis. In this review, we would like to provide a conceptual framework of how impaired stress responses in the ageing lung, as exemplified by dysfunctional redox and protein homeostasis, may contribute to onset and progression of COPD and idiopathic pulmonary fibrosis (IPF). We propose that age-related imbalanced redox and protein homeostasis acts, amongst others (e.g. cellular senescence), as a “first hit” that challenges the adaptive stress-response pathways of the cell, increases the level of oxidative stress and renders the lung susceptible to subsequent injury and disease. In both COPD and IPF, additional environmental insults such as smoking, air pollution and/or infections then serve as “second hits” which contribute to persistently elevated oxidative stress that overwhelms the already weakened adaptive defence and repair pathways in the elderly towards non-adaptive, irremediable stress thereby promoting development and progression of respiratory diseases. COPD and IPF are thus distinct horns of the same devil, “lung ageing”.
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spelling pubmed-94886342022-11-14 The ageing lung under stress Korfei, Martina MacKenzie, BreAnne Meiners, Silke Eur Respir Rev Lung Science Conference Healthy ageing of the lung involves structural changes but also numerous cell-intrinsic and cell-extrinsic alterations. Among them are the age-related decline in central cellular quality control mechanisms such as redox and protein homeostasis. In this review, we would like to provide a conceptual framework of how impaired stress responses in the ageing lung, as exemplified by dysfunctional redox and protein homeostasis, may contribute to onset and progression of COPD and idiopathic pulmonary fibrosis (IPF). We propose that age-related imbalanced redox and protein homeostasis acts, amongst others (e.g. cellular senescence), as a “first hit” that challenges the adaptive stress-response pathways of the cell, increases the level of oxidative stress and renders the lung susceptible to subsequent injury and disease. In both COPD and IPF, additional environmental insults such as smoking, air pollution and/or infections then serve as “second hits” which contribute to persistently elevated oxidative stress that overwhelms the already weakened adaptive defence and repair pathways in the elderly towards non-adaptive, irremediable stress thereby promoting development and progression of respiratory diseases. COPD and IPF are thus distinct horns of the same devil, “lung ageing”. European Respiratory Society 2020-07-08 /pmc/articles/PMC9488634/ /pubmed/32641389 http://dx.doi.org/10.1183/16000617.0126-2020 Text en Copyright ©ERS 2020. https://creativecommons.org/licenses/by-nc/4.0/This article is open access and distributed under the terms of the Creative Commons Attribution Non-Commercial Licence 4.0.
spellingShingle Lung Science Conference
Korfei, Martina
MacKenzie, BreAnne
Meiners, Silke
The ageing lung under stress
title The ageing lung under stress
title_full The ageing lung under stress
title_fullStr The ageing lung under stress
title_full_unstemmed The ageing lung under stress
title_short The ageing lung under stress
title_sort ageing lung under stress
topic Lung Science Conference
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9488634/
https://www.ncbi.nlm.nih.gov/pubmed/32641389
http://dx.doi.org/10.1183/16000617.0126-2020
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