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Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis

The complement component 3 (C3) is a pivotal element of the complement system and plays an important role in innate immunity. A previous study showed that intracellular C3 was upregulated in airway epithelial cells (AECs) from individuals with end-stage chronic obstructive pulmonary disease (COPD)....

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Autores principales: Pei, Yuqiang, Zhang, Jing, Qu, Jingge, Rao, Yafei, Li, Danyang, Gai, Xiaoyan, Chen, Yahong, Liang, Ying, Sun, Yongchang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9807617/
https://www.ncbi.nlm.nih.gov/pubmed/36605203
http://dx.doi.org/10.3389/fimmu.2022.1035930
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author Pei, Yuqiang
Zhang, Jing
Qu, Jingge
Rao, Yafei
Li, Danyang
Gai, Xiaoyan
Chen, Yahong
Liang, Ying
Sun, Yongchang
author_facet Pei, Yuqiang
Zhang, Jing
Qu, Jingge
Rao, Yafei
Li, Danyang
Gai, Xiaoyan
Chen, Yahong
Liang, Ying
Sun, Yongchang
author_sort Pei, Yuqiang
collection PubMed
description The complement component 3 (C3) is a pivotal element of the complement system and plays an important role in innate immunity. A previous study showed that intracellular C3 was upregulated in airway epithelial cells (AECs) from individuals with end-stage chronic obstructive pulmonary disease (COPD). Accumulating evidence has shown that cigarette smoke extract (CSE) induces oxidative stress and apoptosis in AECs. Therefore, we investigated whether C3 modulated cigarette smoke-induced oxidative stress and apoptosis in AECs and participated in the pathogenesis of COPD. We found increased C3 expression, together with increased oxidative stress and apoptosis, in a cigarette smoke-induced mouse model of COPD and in AECs from patients with COPD. Different concentrations of CSEinduced C3 expression in 16HBE cells in vitro. Interestingly, C3 knockdown (KD) exacerbated oxidative stress and apoptosis in 16HBE cells exposed to CSE. Furthermore, C3 exerted its pro-survival effects through JNK inhibition, while exogenous C3 partially rescued CSE-induced cell death and oxidative stress in C3 KD cells. These data indicate that locally produced C3 is an important pro-survival molecule in AECs under cigarette smoke exposure, revealing a potentially novel mechanism in the pathogenesis of COPD.
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spelling pubmed-98076172023-01-04 Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis Pei, Yuqiang Zhang, Jing Qu, Jingge Rao, Yafei Li, Danyang Gai, Xiaoyan Chen, Yahong Liang, Ying Sun, Yongchang Front Immunol Immunology The complement component 3 (C3) is a pivotal element of the complement system and plays an important role in innate immunity. A previous study showed that intracellular C3 was upregulated in airway epithelial cells (AECs) from individuals with end-stage chronic obstructive pulmonary disease (COPD). Accumulating evidence has shown that cigarette smoke extract (CSE) induces oxidative stress and apoptosis in AECs. Therefore, we investigated whether C3 modulated cigarette smoke-induced oxidative stress and apoptosis in AECs and participated in the pathogenesis of COPD. We found increased C3 expression, together with increased oxidative stress and apoptosis, in a cigarette smoke-induced mouse model of COPD and in AECs from patients with COPD. Different concentrations of CSEinduced C3 expression in 16HBE cells in vitro. Interestingly, C3 knockdown (KD) exacerbated oxidative stress and apoptosis in 16HBE cells exposed to CSE. Furthermore, C3 exerted its pro-survival effects through JNK inhibition, while exogenous C3 partially rescued CSE-induced cell death and oxidative stress in C3 KD cells. These data indicate that locally produced C3 is an important pro-survival molecule in AECs under cigarette smoke exposure, revealing a potentially novel mechanism in the pathogenesis of COPD. Frontiers Media S.A. 2022-12-20 /pmc/articles/PMC9807617/ /pubmed/36605203 http://dx.doi.org/10.3389/fimmu.2022.1035930 Text en Copyright © 2022 Pei, Zhang, Qu, Rao, Li, Gai, Chen, Liang and Sun https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Immunology
Pei, Yuqiang
Zhang, Jing
Qu, Jingge
Rao, Yafei
Li, Danyang
Gai, Xiaoyan
Chen, Yahong
Liang, Ying
Sun, Yongchang
Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title_full Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title_fullStr Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title_full_unstemmed Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title_short Complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
title_sort complement component 3 protects human bronchial epithelial cells from cigarette smoke-induced oxidative stress and prevents incessant apoptosis
topic Immunology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9807617/
https://www.ncbi.nlm.nih.gov/pubmed/36605203
http://dx.doi.org/10.3389/fimmu.2022.1035930
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