Abstract:
BACKGROUND:The relative contributions of the cytotoxic phenotype of P. aeruginosa expressing type III secretory toxins and an immunocompromised condition lacking normal Toll-like receptor 4 (TLR4) signaling in the pathogenesis of acute lung injury and sepsis were evaluated in a mouse model for Pseudomonas aeruginosa pneumonia. By using lipopolysaccharide-resistant C3H/HeJ mice missing normal TLR4 signaling due to a mutation on the tlr4 gene, we evaluated how TLR4 signaling modulates the pneumonia caused by cytotoxic P. aeruginosa expressing type III secretory toxins. METHODS:We infected C3H/HeJ or C3H/FeJ mice with three different doses of either a cytotoxic P. aeruginosa strain (wild type PA103) or its non-cytotoxic isogenic mutant missing the type III secretory toxins (PA103DeltaUT). Survival of the infected mice was evaluated, and the severity of acute lung injury quantified by measuring alveolar epithelial permeability as an index of acute epithelial injury and the water to dry weight ratios of lung homogenates as an index of lung edema. Bacteriological analysis and cytokine assays were performed in the infected mice. RESULTS:Development of acute lung injury and sepsis was observed in all mouse strains when the cytotoxic P. aeruginosa strain but not the non-cytotoxic strain was instilled in the airspaces of the mice. Only C3H/HeJ mice had severe bacteremia and high mortality when a low dose of the cytotoxic P. aeruginosa strain was instilled in their lungs. CONCLUSION:The cytotoxic phenotype of P. aeruginosa is the critical factor causing acute lung injury and sepsis in infected hosts. When the P. aeruginosa is a cytotoxic strain, the TLR4 signaling system is essential to clear the bacteria to prevent lethal lung injury and bacteremia.
journal_name
Respir Resjournal_title
Respiratory researchauthors
Faure K,Sawa T,Ajayi T,Fujimoto J,Moriyama K,Shime N,Wiener-Kronish JPdoi
10.1186/1465-9921-5-1keywords:
subject
Has Abstractpub_date
2004-02-12 00:00:00pages
1eissn
1465-9921issn
1465-993Xpii
1465-9921-5-1journal_volume
5pub_type
杂志文章abstract::The transcription factors nuclear factor interleukin-6 (NF-IL6), early growth response-1 (EGR-1) and hypoxia-inducible factor-1 (HIF-1) have important roles in the molecular pathophysiology of hypoxia-associated pulmonary disease. NF-IL6 controls the production of interleukin (IL)-6 in vascular endothelial cells, whic...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/rr27
更新日期:2000-01-01 00:00:00
abstract:BACKGROUND:An imbalance in the generation of pro-inflammatory leukotrienes, and counter-regulatory lipoxins is present in severe asthma. We measured leukotriene B4 (LTB4), and lipoxin A4 (LXA4) production by alveolar macrophages (AMs) and studied the impact of corticosteroids. METHODS:AMs obtained by fiberoptic bronch...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-11-71
更新日期:2010-06-07 00:00:00
abstract::Extracellular vesicles (EVs) are cell-derived membranous vesicles secreted by cells into the extracellular space, which play a role in cell to cell communication. EVs are categorized into 3 groups depending on their size, surface marker, and method of release from the host cell. Recently, EVs have become of interest i...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/s12931-019-1210-z
更新日期:2019-10-30 00:00:00
abstract:BACKGROUND:Lung inflammation in COPD is poorly controlled by inhaled corticosteroids (ICS). Strategies to improve ICS efficacy or the search of biomarkers who may select those patients candidates to receive ICS in COPD are needed. Recent data indicate that MUC1 cytoplasmic tail (CT) membrane mucin can mediate corticost...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0927-4
更新日期:2018-11-20 00:00:00
abstract::In many model systems, cystic fibrosis (CF) phenotype airway epithelial cells in culture respond to P. aeruginosa with greater interleukin (IL)-8 and IL-6 secretion than matched controls. In order to test whether this excess inflammatory response results from the reported increased adherence of P. aeruginosa to the CF...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-6-69
更新日期:2005-07-11 00:00:00
abstract:BACKGROUND:Chronic obstructive pulmonary disease (COPD) is associated with chronic inflammation and impaired immune response to pathogens leading to bacteria-induced exacerbation of the disease. A defect in Th17 cytokines in response to Streptococcus pneumoniae, a bacteria associated with COPD exacerbations, has been r...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-016-0408-6
更新日期:2016-07-26 00:00:00
abstract:BACKGROUND:Pleural effusion (PE) can be divided into benign pleural effusion (BPE) and malignant pleural effusion (MPE). There is no consensus on the identification of lung cancer-associated MPE using the optimal cut-off levels from five common tumor biomarkers (CEA, CYFRA 21-1, CA125, SCC-Ag, and NSE). Therefore, we a...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-020-01557-z
更新日期:2020-10-29 00:00:00
abstract:BACKGROUND:To compare the efficacy and safety of budesonide/formoterol (Symbicort) with formoterol (Oxis) in the treatment of patients with acute asthma who showed evidence of refractoriness to short-acting beta2-agonist therapy. METHODS:In a 3 hour, randomized, double-blind study, a total of 115 patients with acute a...
journal_title:Respiratory research
pub_type: 杂志文章,随机对照试验
doi:10.1186/1465-9921-7-13
更新日期:2006-01-24 00:00:00
abstract:BACKGROUND:Advanced glycation end products (AGEs) have been proposed to be involved in pulmonary fibrosis, but its role in this process has not been fully understood. To investigate the role of AGE formation in pulmonary fibrosis, we used a bleomycin (BLM)-stimulated rat model treated with aminoguanidine (AG), a crossl...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-10-55
更新日期:2009-06-24 00:00:00
abstract:BACKGROUND:Host-associated microbial communities have important roles in tissue homeostasis and overall health. Severe perturbations can occur within these microbial communities during critical illness due to underlying diseases and clinical interventions, potentially influencing patient outcomes. We sought to profile ...
journal_title:Respiratory research
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12931-018-0950-5
更新日期:2018-12-07 00:00:00
abstract:BACKGROUND:Genetic variation may underlie phenotypic variation in chronic obstructive pulmonary disease (COPD) in subjects with and without alpha 1 antitrypsin deficiency (AATD). Genotype specific sub-phenotypes are likely and may underlie the poor replication of previous genetic studies. This study investigated subjec...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-9-52
更新日期:2008-07-11 00:00:00
abstract:BACKGROUND:ATP-regulated potassium channels (KATP) regulate pulmonary vascular tone and are involved in hypoxic pulmonary vasoconstriction (HPV). In patients with inflammation like sepsis or ARDS, HPV is impaired, resulting in a ventilation-perfusion mismatch and hypoxia. Since increase of vascular KATP channel Kir6.1 ...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0735-x
更新日期:2018-02-13 00:00:00
abstract::Pulmonary surfactant is a complex fluid that comprises phospholipids and four proteins (SP-A, SP-B, SP-C, and SP-D) with different biological functions. SP-B, SP-C, and SP-D are essential for the lungs' surface tension function and for the organization, stability and metabolism of lung parenchyma. SP-A and SP-D, which...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/s12931-016-0385-9
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:Acute respiratory distress syndrome (ARDS) is a severe form of lung injury characterized by damage to the epithelial barrier with subsequent pulmonary edema and hypoxic respiratory failure. ARDS is a significant medical problem in intensive care units with associated high care costs. There are many potential...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0856-2
更新日期:2018-08-22 00:00:00
abstract:BACKGROUND:CXCR4 is the receptor for chemokine CXCL12 and reportedly plays an important role in systemic vascular repair and remodeling, but the role of CXCR4 in development of pulmonary hypertension and vascular remodeling has not been fully understood. METHODS:In this study we investigated the role of CXCR4 in the d...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-12-21
更新日期:2011-02-04 00:00:00
abstract:BACKGROUND:Acute respiratory distress syndrome (ARDS) can have various causes. The study objective was to investigate whether different pathophysiologic models of ARDS would show different respiratory, cardiovascular and inflammatory outcomes. METHODS:We performed a prospective, randomized study in 27 ventilated ewes ...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-020-01475-0
更新日期:2020-08-08 00:00:00
abstract:BACKGROUND:Airway smooth muscle contraction is critical for maintenance of appropriate airway tone, and has been implicated in asthma pathogenesis. Smooth muscle contraction requires an "engine" (myosin activation) and a "transmission system" (actin cytoskeletal remodeling). However, the mechanisms that control actin r...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-017-0709-4
更新日期:2018-01-05 00:00:00
abstract:BACKGROUND:Fibrocytes are implicated in Idiopathic Pulmonary Fibrosis (IPF) pathogenesis and increased proportions in the circulation are associated with poor prognosis. Upon tissue injury, fibrocytes migrate to the affected organ. In IPF patients, circulating fibrocytes are increased especially during exacerbations, h...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0798-8
更新日期:2018-05-10 00:00:00
abstract::Bacillus Calmette-Guérin (BCG) vaccination is routine and near-universal in many low- and middle-income countries (LMIC). It has been suggested that BCG can have a protective effect on COVID-19 morbidity and mortality. This commentary discusses the limitations of the evidence around BCG and COVID-19. We argue that hig...
journal_title:Respiratory research
pub_type: 信件,评审
doi:10.1186/s12931-020-01439-4
更新日期:2020-07-11 00:00:00
abstract:BACKGROUND:Inflammation may contribute to the pathogenesis of various forms of pulmonary hypertension (PH). Recent studies in patients with idiopathic PH or PH associated with underlying diseases suggest a role for interleukin-6 (IL-6). METHODS:To determine whether endogenous IL-6 contributes to mediate hypoxic PH and...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-10-6
更新日期:2009-01-27 00:00:00
abstract:BACKGROUND:CD14, a receptor for lipopolysaccharides (LPS), is found in both a membrane-bound form (mCD14) and a soluble form (sCD14). It is suggested that sCD14 is mainly released from blood monocytes by serine protease-mediated shedding. Because alpha1-antitrypsin (AAT), an inhibitor of serine proteases, has been show...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-9-34
更新日期:2008-04-21 00:00:00
abstract:BACKGROUND:Chronic respiratory diseases (CRDs) are leading causes of morbidity worldwide. However, the spatial and temporal trends in prevalence and incidence of CRDs have not been estimated. METHODS:Based on data from the Global Burden of Diseases, Injuries, and Risk Factors Study 2017, we analyzed the prevalence and...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-020-1291-8
更新日期:2020-02-11 00:00:00
abstract:BACKGROUND:Radiation pneumonitis (RP) is a frequent complication of concurrent chemoradiotherapy (CCRT) and is associated with severe symptoms that decrease quality of life and might result in pulmonary fibrosis or death. The aim of this study is to identify whether pulmonary function test (PFT) abnormalities may predi...
journal_title:Respiratory research
pub_type: 杂志文章,多中心研究
doi:10.1186/s12931-018-0775-2
更新日期:2018-04-24 00:00:00
abstract:BACKGROUND:There are limited series concerning Dieulafoy disease of the bronchus. We describe the clinical presentation of a series of 7 patients diagnosed with Dieulafoy disease of the bronchus and provide information about the pathological diagnosis approach. PATIENTS AND METHODS:A retrospective review of patients w...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-9-58
更新日期:2008-08-05 00:00:00
abstract:BACKGROUND:It is unclear whether the responses of refractory and common Mycoplasma pneumoniae (MP) pneumonia to macrolides differ. Hence, this study aimed to identify biomarkers that may be used to distinguish refractory and common pneumonias caused by MP in children at hospital admission. METHODS:The study included 1...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-019-1152-5
更新日期:2019-08-23 00:00:00
abstract:BACKGROUND:An important goal of chronic obstructive pulmonary disease (COPD) treatment is to reduce the frequency of exacerbations. Some observations suggest a decline in exacerbation rates in clinical trials over time. A more systematic understanding would help to improve the design and interpretation of COPD trials. ...
journal_title:Respiratory research
pub_type: 杂志文章,meta分析
doi:10.1186/s12931-019-1163-2
更新日期:2019-08-16 00:00:00
abstract:BACKGROUND:Proteomic studies of respiratory disorders have the potential to identify protein biomarkers for diagnosis and disease monitoring. Utilisation of sensitive quantitative proteomic methods creates opportunities to determine individual patient proteomes. The aim of the current study was to determine if quantita...
journal_title:Respiratory research
pub_type: 杂志文章,随机对照试验
doi:10.1186/1465-9921-12-124
更新日期:2011-09-22 00:00:00
abstract:BACKGROUND:Legionella pneumophila (LPN) can cause a lethal infectious disease with a marked inflammatory response in humans. However, the mechanism of this severe inflammation remains poorly understood. Since necrosis is known to induce inflammation, we investigated whether LPN induces necrosis in macrophages. We also ...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-11-158
更新日期:2010-11-22 00:00:00
abstract::The lung responds to a variety of insults in a remarkably consistent fashion but with inconsistent outcomes that vary from complete resolution and return to normal to the destruction of normal architecture and progressive fibrosis. Increasing evidence indicates that diffuse lung disease results from an imbalance betwe...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/rr177
更新日期:2002-01-01 00:00:00
abstract::The nervous system mediates key airway protective behaviors, including cough, mucus secretion, and airway smooth muscle contraction. Thus, its involvement and potential involvement in several airway diseases has become increasingly recognized. In the current review, we focus on the contribution of select neuropeptides...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/s12931-018-0846-4
更新日期:2018-08-06 00:00:00