Respiratory Research最新文献

{"title":"Risk of lung disease with the Pi*SS genotype of alpha-1 antitrypsin: the evidence in context.","authors":"Helen O'Brien, Cormac McCarthy, Alessandro N Franciosi","doi":"10.1186/s12931-024-03066-9","DOIUrl":"10.1186/s12931-024-03066-9","url":null,"abstract":"","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"37"},"PeriodicalIF":5.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11763142/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143042225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Response to: risk of lung disease with the Pi*SS genotype of alpha-1 antitrypsin: the evidence in context.","authors":"Teresa Martín, Marc Miravitlles","doi":"10.1186/s12931-024-03065-w","DOIUrl":"10.1186/s12931-024-03065-w","url":null,"abstract":"","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"36"},"PeriodicalIF":5.8,"publicationDate":"2025-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11762059/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143042141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neutrophil extracellular traps (NETs) are increased in rheumatoid arthritis-associated interstitial lung disease.","authors":"Jing Xue, Miaomiao Nian, Yangyang Liang, Zeqin Zhu, Zhenyu Hu, Yuanyuan Jia, Shuhong Chi, Juan Chen","doi":"10.1186/s12931-025-03111-1","DOIUrl":"10.1186/s12931-025-03111-1","url":null,"abstract":"<p><strong>Background: </strong>Neutrophil extracellular trap (NET) formation has been implicated as a pathogenic mechanism in both rheumatoid arthritis (RA) and interstitial lung disease (ILD). However, the role of NETs in RA-associated ILD (RA-ILD) and the mechanisms driving NET formation remain unclear. This study aimed to assess the involvement of NETs in RA-ILD and elucidate the underlying mechanisms.</p><p><strong>Methods: </strong>Single-cell sequencing was used to identify changes in the quantity and function of neutrophils in the lung tissue of a zymosan A (ZYM)-induced interstitial pneumonia arthritis model. Additionally, nuclear receptor 4A3 (NR4A3) interference was performed in HL-60 cells to assess its impact on NET formation and the transformation of MRC-5 cells into myofibroblasts. The clinical relevance of plasma myeloperoxidase-DNA (MPO-DNA), citrullinated histone 3 (Cit-H3), and cell-free DNA was evaluated in RA-ILD patients with different imaging types via a commercial enzyme-linked immunosorbent assay (ELISA).</p><p><strong>Results: </strong>In the ZYM-treated SKG mouse model, which recapitulates key features of RA-ILD, an increased population of neutrophils in the lung tissue was primarily responsible for NET formation. Mechanistically, we found that interference with NR4A3 expression enhanced NET formation in HL-60 cells, which in turn promoted the differentiation of MRC-5 cells into myofibroblasts. Clinically, plasma MPO-DNA levels are elevated in patients with RA-nonspecific interstitial pneumonia (RA-NSIP), whereas Cit-H3 levels are elevated in RA-usual interstitial pneumonia (RA-UIP) patients compared with healthy subjects. ROC curve analysis further revealed that the combination of plasma MPO-DNA, rheumatoid factor (RF), and anti-citrullinated protein (anti-CCP) and the combination of Cit-H3, RF, and anti-CCP were superior diagnostic panels for NSIP and UIP in RA-ILD patients, respectively. Moreover, compared with those from healthy controls, neutrophils from patients with RA-UIP and RA-NSIP demonstrated a significantly increased ability to form NETs and induce the differentiation of MRC-5 cells into myofibroblasts. Specifically, RA-UIP patients exhibited a greater capacity for NET formation and the differentiation of MRC-5 cells into myofibroblasts than did RA-NSIP patients.</p><p><strong>Conclusions: </strong>These findings suggest that targeting NETs may be a novel therapeutic approach for treating ILD in RA patients.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"33"},"PeriodicalIF":5.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11756115/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The fibronectin-targeting PEG-FUD imaging probe shows enhanced uptake during fibrogenesis in experimental lung fibrosis.","authors":"Thomas J Harr, Nikesh Gupta, Babita Rahar, Kristen Stott, Yadira Medina-Guevara, Metti K Gari, Angie T Oler, Ivy Sohee McDermott, Hye Jin Lee, Morteza Rasoulianboroujeni, Ashley M Weichmann, Amir Forati, Kelsey Holbert, Trevor S Langel, Kade W Coulter, Brian M Burkel, Bianca R Tomasini-Johansson, Suzanne M Ponik, Jonathan W Engle, Reinier Hernandez, Glen S Kwon, Nathan Sandbo, Ksenija Bernau","doi":"10.1186/s12931-025-03107-x","DOIUrl":"10.1186/s12931-025-03107-x","url":null,"abstract":"<p><p>Progressive forms of interstitial lung diseases, including idiopathic pulmonary fibrosis (IPF), are deadly disorders lacking non-invasive biomarkers for assessment of early disease activity, which presents a major obstacle in disease management. Excessive extracellular matrix (ECM) deposition is a hallmark of these disorders, with fibronectin being an abundant ECM glycoprotein that is highly upregulated in early fibrosis and serves as a scaffold for the deposition of other matrix proteins. Due to its role in active fibrosis, we are targeting fibronectin as a biomarker of early lung fibrosis disease activity via the PEGylated fibronectin-binding polypeptide (PEG-FUD). In this work, we demonstrate the binding of PEG-FUD to the fibrotic lung throughout the course of bleomycin-induced murine model of pulmonary fibrosis. We first analyzed the binding of radiolabeled PEG-FUD following direct incubation to precision cut lung slices from mice at different stages of experimental lung fibrosis. Then, we administered fluorescently labeled PEG-FUD subcutaneously to mice over the course of bleomycin-induced pulmonary fibrosis and assessed peptide uptake 24 h later through ex vivo tissue imaging. Using both methods, we found that peptide targeting to the fibrotic lung is increased during the fibrogenic phase of the single dose bleomycin lung fibrosis model (days 7 and 14 post-bleomycin). At these timepoints we found a correlative relationship between peptide uptake and fibrotic burden. These data suggest that PEG-FUD targets fibronectin associated with active fibrogenesis in this model, making it a promising candidate for a clinically translatable molecular imaging probe to non-invasively determine pulmonary fibrosis disease activity, enabling accelerated therapeutic decision-making.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"34"},"PeriodicalIF":5.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11756063/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extracellular matrix turnover in severe COVID-19 is reduced by corticosteroids.","authors":"Janesh Pillay, Antine W Flikweert, Matijs van Meurs, Marco J Grootenboers, Simone van der Sar-van der Brugge, Peter H J van der Voort, Morten A Karsdal, Jannie M B Sand, Diana J Leeming, Janette K Burgess, Jill Moser","doi":"10.1186/s12931-025-03098-9","DOIUrl":"10.1186/s12931-025-03098-9","url":null,"abstract":"<p><strong>Background: </strong>Severe and critical COVID-19 is characterized by pulmonary viral infection with SARS-CoV-2 resulting in local and systemic inflammation. Dexamethasone (DEX) has been shown to improve outcomes in critically ill patients; however, its effect on tissue remodeling, particularly collagen turnover, remains unclear. This study investigated the association between circulating extracellular matrix (ECM) remodeling neo-epitopes and COVID-19 severity, their relationship with mortality, and the effect of DEX on these markers.</p><p><strong>Methods: </strong>We conducted a multi-center prospective cohort study involving 226 COVID-19 patients: 157 with severe disease admitted to the ward and 69 with critical disease admitted to the ICU. Plasma samples were collected at ICU admission and at discharge or death. Circulating collagen degradation (C3M, C4Ma3, and C6M) and synthesis (PRO-C3, PRO-C4, and PRO-C6) neo-epitopes were measured. Longitudinal analysis of ECM neo-epitope changes during ICU stay and their association with mortality was performed, along with an evaluation of the impact of DEX treatment on these markers.</p><p><strong>Results: </strong>Critically ill patients exhibited higher levels of collagen degradation (reflecting inflammatory driven ECM destruction) (C3M, C6M) and collagen synthesis (strongly related to fibroblast activity) (PRO-C3, PRO-C6) neo-epitopes than severe patients. Increased collagen turnover, measured during ICU stay, was associated with mortality. Non-survivors displayed rising levels of collagen degradation and synthesis markers over time, whereas survivors had stable or declining levels. In non-survivors without DEX treatment, C6M and PRO-C6 levels were significantly increased, whereas these elevations were less pronounced in patients treated with DEX.</p><p><strong>Conclusion: </strong>Our findings suggest that elevated collagen turnover is associated with poor outcomes in critically ill COVID-19 patients. DEX treatment appeared to attenuate ECM remodeling, although this effect was not linked to improved survival. Further studies are needed to confirm these observations and better understand the role of ECM remodeling in COVID-19 and the potential therapeutic impact of corticosteroids.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"32"},"PeriodicalIF":5.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11755962/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incident Cheyne-Stokes respiration occurring in CPAP-treated patients and cardiovascular risk: a 2-years prospective follow-up (The Alertapnee study).","authors":"Arnaud Prigent, Joëlle Texereau, Sébastien Bailly, Renaud Gervais, Anne-Laure Serandour, Régis Luraine, Jean Louis Pépin","doi":"10.1186/s12931-025-03109-9","DOIUrl":"10.1186/s12931-025-03109-9","url":null,"abstract":"<p><p>The Alertapnée study followed 555 adults with obstructive sleep apnea treated with CPAP and found that the occurrence of Cheyne-Stokes respiration (CSR) was linked to a 14-fold increase in the risk of significant cardiac events (SCE) after one year. However, the progression and clinical significance of CSR episodes over time remain unclear. This ancillary study aimed to assess CSR progression and clinical outcomes during a second year of follow-up in 66 patients who had experienced at least one CSR episode in the first year. The study focused on the number of nights with CSR, percentage of CSR, SCEs. Results showed that 62 of 66 patients with CSR in the first year also experienced CSR in the second year, with a significant increase in the median number of CSR nights, particularly when CSR was related to cardiovascular conditions (37 vs. 19 nights, p = 0.006). Patients who experienced a SCE in year 2 had significantly more nights with CSR (median 48/90nights; IQR = 35) and a significantly greater mean percentage of CSR (median 13.8%; interquartile range (IQR) = 13.7) as compared with patients free of SCE (median 9.5/90 nights IQR = 27.8 (p = 0.012); 6.1% IQR = 4.5 (p = 0.008), respectively). In conclusion, CSR occurrence and severity depend on the underlying condition. CSR related to cardiovascular aetiology increases over time and is associated with SCEs, whereas CSR linked to non-cardiovascular conditions does not indicate a poor prognosis. Identifying CSR patterns related to cardiovascular aetiologies could enable early detection of SCEs through telemonitoring in CPAP-treated patients.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"31"},"PeriodicalIF":5.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11755797/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of immunosuppression on outcomes in elderly patients with community-acquired pneumonia.","authors":"Lixue Huang, Bingxuan Weng, Yuanqi Wang, Mengyuan Wang, Yin Mei, Wei Chen, Meng Ma, Jingnan Li, Jianzhen Weng, Yang Ju, Xuefeng Zhong, Xunliang Tong, Yanming Li","doi":"10.1186/s12931-024-03080-x","DOIUrl":"10.1186/s12931-024-03080-x","url":null,"abstract":"<p><strong>Background: </strong>The effect of immunosuppression on clinical manifestations and outcomes was unclear in elderly patients with CAP.</p><p><strong>Methods: </strong>Elderly hospitalised patients with CAP were consecutively enrolled and were divided into immunocompromised hosts (ICHs) or non-ICHs groups. Clinical manifestations, severity, and outcomes were compared. The logistic regression model was used to determine the association between immunosuppression and outcomes. The primary outcome was 30-day mortality.</p><p><strong>Results: </strong>A total of 822 patients were enrolled, of whom 133 (16.2%) were immunocompromised. There were no differences between the two groups in vital signs, oxygenation, admission laboratory tests, need for mechanical ventilation and intensive care unit admission, except for a lower lymphocyte count in the ICH group (0.9*10^9/L, IQR 0.6-1.3*10^9/L [ICH group] vs. 1.2*10^9/L, IQR 0.8-1.7*10^9/L [non-ICH group]; p < 0.001). The 30-day mortality in ICHs was 15.8%, significantly higher than the 5.1% in non-ICHs (p < 0.001). The risk distribution of severity was similar between the two groups when assessed by CURB-65 on admission; however, the significant difference was found when assessed by PSI. Notably, in the CURB-65 low-risk group, the 30-day mortality was significantly higher in ICHs than in non-ICHs (9.7% vs. 1.1%, p < 0.001); but there was no difference between ICHs and non-ICHs in PSI low-risk group (3.7% vs. 0.6%; p > 0.05). After adjusting for age, sex, and comorbidities, immunosuppression was significantly associated with a higher risk of 30-day mortality (odds ratio 5.004, 95% CI [2.618-9.530]).</p><p><strong>Conclusions: </strong>Immunosuppression was independently associated with an increased risk of 30-day mortality. CURB-65 may underestimate the mortality risk of ICHs.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"30"},"PeriodicalIF":5.8,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11756152/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143025346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dysfunction in mitochondrial electron transport chain drives the pathogenesis of pulmonary arterial hypertension: insights from a multi-omics investigation.","authors":"Xin Zhang, Jieling Li, Minyi Fu, Xijie Geng, Junjie Hu, Ke-Jing Tang, Pan Chen, Jianyong Zou, Xiaoman Liu, Bo Zeng","doi":"10.1186/s12931-025-03099-8","DOIUrl":"10.1186/s12931-025-03099-8","url":null,"abstract":"<p><strong>Background: </strong>Pulmonary arterial hypertension (PAH) is a progressive disorder that can lead to right ventricular failure and severe consequences. Despite extensive efforts, limited progress has been made in preventing the progression of PAH. Mitochondrial dysfunction is implicated in the development of PAH, but the key mitochondrial functional alterations in the pathogenesis have yet to be elucidated.</p><p><strong>Methods: </strong>We integrated three microarray datasets from the Gene Expression Omnibus (GEO), including 222 lung samples (164 PAH, 58 controls), for differential expression and functional enrichment analyses. Machine learning identified key mitochondria-related signaling pathways. PAH and control lung tissue samples were collected, and transcriptomic and metabolomic profiling were performed. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis investigated shared pathways, and canonical correlation analysis assessed gene-metabolite relationships.</p><p><strong>Results: </strong>In the GEO datasets, mitochondria-related signaling pathways were significantly enriched in PAH samples, in particular the electron transport chain (ETC) in mitochondrial oxidative phosphorylation system. Notably, the electron transport from cytochrome c to oxygen in ETC was identified as the most crucial mitochondria-related pathway, which was down-regulated in PAH samples. Transcriptomic profiling of the clinical lung tissue analysis identified 14 differentially expressed genes (DEGs) related to mitochondrial function. Metabolomic analysis revealed three differential metabolites in PAH samples: increased 3-phenyllactic acid and ADP, and decreased citric acid. Mitochondria-related genes highly correlated with these metabolites included KIT, OTC, CAMK2A, and CHRNA1.</p><p><strong>Conclusions: </strong>Down-regulation of electron transport from cytochrome c to oxygen in mitochondrial ETC and disruption of the citric acid cycle homeostasis may contribute to PAH pathogenesis. 3-phenyllactic acid emerges as a potential novel diagnostic biomarker for PAH. These findings offer insights for developing novel PAH therapies and diagnostics.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"29"},"PeriodicalIF":5.8,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11749457/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143014718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neutrophil elastase inhibitor (Sivelestat) in the treatment of acute respiratory distress syndrome induced by COVID-19: a multicenter retrospective cohort study.","authors":"Yuting Li, Jianjun Zhao, Jiahui Wei, Yanhong Zhang, Haitao Zhang, Ying Li, Ting Liao, Yang Hu, Bo Yuan, Xinmei Zhang, Wanyan Liu, Changgang Liu, Qingsong Cui, Shunzi Wu, Hongmei Jiang, Wenge Liu, Weiheng Liu, Hongguang Xu, Gang Li, Yuyan Cai, Liting Chen, Bingwei Chen, Dong Zhang","doi":"10.1186/s12931-025-03100-4","DOIUrl":"10.1186/s12931-025-03100-4","url":null,"abstract":"<p><strong>Background: </strong>Recent studies suggest that neutrophil elastase inhibitor (Sivelestat) may improve pulmonary function and reduce mortality in patients with acute respiratory distress syndrome. We examined the association between receipt of sivelestat and improvement in oxygenation among patients with acute respiratory distress syndrome (ARDS) induced by COVID-19.</p><p><strong>Methods: </strong>A large multicentre cohort study of patients with ARDS induced by COVID-19 who had been admitted to intensive care units (ICUs). We used propensity score matching to compare the outcomes of patients treated with sivelestat to those who were not. The differences in continuous outcomes were assessed with the Wilcoxon signed-rank test. Kaplan-Meier method was used to show the 28-day survival curves in the matched cohorts. A log-rank P-test stratified on the matched pairs was used to test the equality of the estimated survival curves. A Cox proportional hazards model that incorporated a robust sandwich-type variance estimator to account for the matched nature of the data was used to estimate hazard ratios (HR). All statistical analyses were performed with SPSS 26.0 and R 4.2.3. A two-sided p-value of < 0.05 was considered statistically significant.</p><p><strong>Results: </strong>A total of 387 patients met inclusion criteria, including 259 patients (66.9%) who were treated with sivelestat. In 158 patients matched on the propensity for treatment, receipt of sivelestat was associated with improved oxygenation, decreased Murray lung injury score, increased non-mechanical ventilation time within 28 days, increased alive and ICU-free days within 28 days (HR, 1.85; 95% CI 1.29 to 2.64; log-rank p < 0.001), shortened ICU stay and ultimately improved survival (HR, 2.78; 95% CI 1.32 to 5.88; log-rank p = 0.0074).</p><p><strong>Conclusions: </strong>Among patients with ARDS induce by COVID-19, sivelestat administration is associated with improved clinical outcomes.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"28"},"PeriodicalIF":5.8,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11743030/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143014686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aspergillus fumigatus is responsible for inflammation in a murine model of chronic obstructive pulmonary disease exacerbation.","authors":"Alexandra Bouyssi, Alexis Trecourt, Tanguy Déméautis, Florence Persat, Olivier Glehen, Martine Wallon, Gilles Devouassoux, Abderrazzak Bentaher, Jean Menotti","doi":"10.1186/s12931-024-03092-7","DOIUrl":"10.1186/s12931-024-03092-7","url":null,"abstract":"<p><strong>Background: </strong>In patients with chronic obstructive pulmonary disease (COPD), a sensitization to A. fumigatus has been related to a decline in lung function, but the role of fungal agents in the disease pathogenesis remains unclear. The main purpose of the present study was to investigate whether cell inflammation could worsen after exposure to A. fumigatus spores in vitro and then, in mice, following chronic exposure to cigarette smoke mimicking COPD.</p><p><strong>Methods: </strong>The inflammatory response to cigarette smoke alone or with A. fumigatus was investigated in cell culture models of murine macrophages and alveolar epithelial cells. In an animal model, mice were exposed daily to two cigarettes smoke over 14 weeks, and two intranasal instillations of 10⁵ spores at weeks 7 and 14. Then, their lungs were recovered to perform inflammatory and histopathological analyses.</p><p><strong>Results: </strong>In co-cultures of macrophages and epithelial cells treated with both cigarette smoke extracts (CSE) and A. fumigatus compared to CSE alone there were significant inductions in TNF-α (6.2-fold) and CXCL-2 (21.5-fold) gene expression, confirmed by significant increases in the corresponding protein secretion. In the murine model, histological analyses of the lung after chronic smoke exposure showed an increase in airspace enlargement. Moreover, a Bio-Plex approach on bronchoalveolar lavage of cigarette smoke and A. fumigatus-treated mice showed significant increases in multiple inflammatory proteins secreted in the lung.</p><p><strong>Conclusions: </strong>There was a stronger inflammatory response after cigarette smoke exposure with A. fumigatus compared to cigarette smoke alone. These findings were correlated with histopathological changes in the mouse lung in vivo.</p>","PeriodicalId":49131,"journal":{"name":"Respiratory Research","volume":"26 1","pages":"25"},"PeriodicalIF":5.8,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11743040/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143014708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}