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 crosslink inhibitor of AGE formation. METHODS:Rats were intratracheally instilled with BLM (5 mg/kg) and orally administered with AG (40, 80, 120 mg/kg) once daily for two weeks. AGEs level in lung tissue was determined by ELISA and pulmonary fibrosis was evaluated by Ashcroft score and hydroxyproline assay. The expression of heat shock protein 47 (HSP47), a collagen specific molecular chaperone, was measured with RT-PCR and Western blot. Moreover, TGFbeta1 and its downstream Smad proteins were analyzed by Western blot. RESULTS:AGEs level in rat lungs, as well as lung hydroxyproline content and Ashcroft score, was significantly enhanced by BLM stimulation, which was abrogated by AG treatment. BLM significantly increased the expression of HSP47 mRNA and protein in lung tissues, and AG treatment markedly decreased BLM-induced HSP47 expression in a dose-dependent manner (p < 0.05). In addition, AG dose-dependently downregulated BLM-stimulated overexpressions of TGFbeta1, phosphorylated (p)-Smad2 and p-Smad3 protein in lung tissues. CONCLUSION:These findings suggest AGE formation may participate in the process of BLM-induced pulmonary fibrosis, and blockade of AGE formation by AG treatment attenuates BLM-induced pulmonary fibrosis in rats, which is implicated in inhibition of HSP47 expression and TGFbeta/Smads signaling.
journal_name
Respir Resjournal_title
Respiratory researchauthors
Chen L,Wang T,Wang X,Sun BB,Li JQ,Liu DS,Zhang SF,Liu L,Xu D,Chen YJ,Wen FQdoi
10.1186/1465-9921-10-55subject
Has Abstractpub_date
2009-06-24 00:00:00pages
55eissn
1465-9921issn
1465-993Xpii
1465-9921-10-55journal_volume
10pub_type
杂志文章abstract:BACKGROUND:Cigarette smoke induced oxidative stress has been shown to reduce silent information regulator 1 (Sirt1) levels in lung tissue from smokers and patients with COPD patients. Sirt1 is known to inhibit endothelial senescence and may play a protective role in vascular cells. Endothelial progenitor cells (EPCs) a...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-016-0452-2
更新日期:2016-10-27 00:00:00
abstract::Healthy individuals have few goblet cells in their airways, but in patients with hypersecretory diseases goblet-cell upregulation results in mucus hypersecretion, airway plugging, and death. Multiple stimuli produce hypersecretion via epidermal growth factor receptor (EGFR) expression and activation, causing goblet-ce...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/rr43
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:Patients with severe, uncontrolled asthma, particularly those with a non-eosinophilic phenotype, have a great unmet need for new treatments that act on a broad range of inflammatory pathways in the airway. Tezepelumab is a human monoclonal antibody that blocks the activity of thymic stromal lymphopoietin, an...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-020-01513-x
更新日期:2020-10-13 00:00:00
abstract:BACKGROUND:Little is known about the association between cigarette smoking and asthma severity. We assessed smoking as a determinant of disease severity and control in a cohort of clinic-referred allergic subjects who developed new onset asthma. METHODS:Allergic rhinitis subjects with no asthma (n = 371) were followed...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-12-16
更新日期:2011-01-24 00:00:00
abstract:BACKGROUND:Work-place exposure to silica dust may lead to progressive lung inflammation culminating in the development of silicosis, an irreversible condition that can be complicated by onset of pulmonary hypertension (PH). The molecular mechanisms leading to the development of PH and lung fibrosis in response to silic...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0933-6
更新日期:2018-11-20 00:00:00
abstract:BACKGROUND:Influenza virus binds to cell receptors via sialic acid (SA) linked glycoproteins. They recognize SA on host cells through their haemagglutinins (H). The distribution of SA on cell surfaces is one determinant of host tropism and understanding its expression on human cells and tissues is important for underst...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-8-73
更新日期:2007-10-25 00:00:00
abstract:BACKGROUND:Real-world evidence (RWE) can inform patient management decisions, but RWE studies are associated with limitations. Linkage of different RWE data types could address such limitations by enriching data and improving scientific quality. Using the example of chronic obstructive pulmonary disease (COPD) in Germa...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0865-1
更新日期:2018-08-30 00:00:00
abstract:BACKGROUND:Heat shock protein (HSP) 47 is a collagen-specific molecular chaperone that is required for molecular maturation of various types of collagens. We recently reported that HSP47 serum levels were markedly higher in patients with acute exacerbations of idiopathic pulmonary fibrosis (IPF) when compared with pati...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-14-133
更新日期:2013-11-20 00:00:00
abstract:BACKGROUND:Glucocorticoid (GC) resistance is a major barrier in COPD treatment. We have shown increased expression of the drug efflux pump, Pgp1 in cytotoxic/pro-inflammatory lymphocytes in COPD. Loss of lymphocyte co-stimulatory molecule CD28 (lymphocyte senescence) was associated with a further increase in their pro-...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-014-0161-7
更新日期:2015-01-09 00:00:00
abstract:BACKGROUND:MIF is a critical mediator of the host defense, and is involved in both acute and chronic responses in the lung. Neutralization of MIF reduces neutrophil accumulation into the lung in animal models. We hypothesized that MIF, in the alveolar space, promotes neutrophil accumulation via activation of the CD74 r...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-10-33
更新日期:2009-05-04 00:00:00
abstract:BACKGROUND:The discrepancy between functional and inflammatory airway response to ozone has been reported in normal subjects, but few data are available for stable asthmatics regularly treated with inhaled corticosteroids. METHODS:Twenty-three well controlled, regularly treated, mild-to-moderate asthmatic patients und...
journal_title:Respiratory research
pub_type: 杂志文章,随机对照试验
doi:10.1186/1465-9921-11-5
更新日期:2010-01-19 00:00:00
abstract:BACKGROUND:Recently, increased tumor incidence and cancer-related mortality have been reported among patients with obstructive sleep apnea (OSA). Intermittent hypoxia (IH), the hallmark feature of OSA, contributes to the metastasis of tumors. However, the molecular mechanisms by which tumor metastasis is accelerated by...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-018-0727-x
更新日期:2018-02-12 00:00:00
abstract:BACKGROUND:Idiopathic pulmonary arterial hypertension (IPAH) continues to be one of the most serious intractable diseases that might start with activation of several triggers representing the genetic susceptibility of a patient. To elucidate what essentially contributes to the onset and progression of IPAH, we investig...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-13-103
更新日期:2012-11-17 00:00:00
abstract:BACKGROUND:Current therapy for relieving bronchoconstriction may be ineffective in severe asthma, particularly in the small airways. The aim of this study was to further characterise responses to the recently identified novel bronchodilators rosiglitazone (RGZ) and chloroquine (CQ) under conditions where β-adrenoceptor...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-15-29
更新日期:2014-03-12 00:00:00
abstract::Small airway and vessels play a critical role in chronic airway and pulmonary vascular diseases, but their pharmacology has not been well characterised. We have studied airway and vascular responses in rat lung slices and separately in vitro using myography. In lung slices, under basal conditions, acetylcholine contra...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-7-111
更新日期:2006-08-21 00:00:00
abstract:BACKGROUND:Extended culture of monocytes and fibroblasts in three-dimensional collagen gels leads to degradation of the gels (see linked study in this issue, "Fibroblasts and monocytes contract and degrade three-dimensional collagen gels in extended co-culture"). The current study, therefore, was designed to evaluate p...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/rr73
更新日期:2001-01-01 00:00:00
abstract::The role of the ATP binding cassette transporter A1 (ABCA1) in maintaining cellular lipid homeostasis in cardiovascular disease is well established. More recently, the important beneficial role played by ABCA1 in modulating pathogenic disease mechanisms, such as inflammation, in a broad range of chronic conditions has...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/s12931-020-01515-9
更新日期:2020-09-25 00:00:00
abstract:BACKGROUND:To assess the symptomatic and cost burden among patients initiating long-acting bronchodilator (LABD) therapy and impact of adherence on healthcare resource use and costs. METHODS:This retrospective cohort study identified patients with COPD who were newly prescribed a LABD (long-acting muscarinic antagonis...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-015-0295-2
更新日期:2015-11-16 00:00:00
abstract:BACKGROUND:Cigarette smoke (CS) is the main cause in the development of chronic obstructive pulmonary disease (COPD), the pathogenesis of which is related to an extended inflammatory response. In this study, we investigated the effect of low and high doses of gas phase cigarette smoke (GPS) on cultured lymphocyte proge...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/1465-9921-10-82
更新日期:2009-09-10 00:00:00
abstract::The use of biomarkers in medicine lies in their ability to detect disease and support diagnostic and therapeutic decisions. New research and novel understanding of the molecular basis of the disease reveals an abundance of exciting new biomarkers who present a promise for use in the everyday clinical practice. The pas...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:10.1186/1465-9921-6-78
更新日期:2005-07-21 00:00:00
abstract:OBJECTIVES:Swimming is one of the most popular forms of physical activity. Pool water is cleaned with chlorine, which - in combination with compounds contained in water - could form chloramines and trichloromethane in the swimmer's lungs. The aim of the present study was to examine the effect of swimming training in an...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-020-01350-y
更新日期:2020-04-15 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:BACKGROUND:Progestins as respiratory stimulants in chronic obstructive pulmonary disease (COPD) have been investigated in males and during wakefulness. However, sleep and gender may influence therapeutic responses. We investigated the effects of a 2-week medroxyprogesterone acetate (MPA) therapy on sleep and nocturnal ...
journal_title:Respiratory research
pub_type: 临床试验,杂志文章
doi:10.1186/1465-9921-6-28
更新日期:2005-04-04 00:00:00
abstract:BACKGROUND:In order to find novel noninvasive biomarkers with high accuracy for the screening of early-stage non-small cell lung cancer (NSCLC), we investigate the predictive power of 5 microRNAs (miR-20a, miR-145, miR-21, miR223 and miR-221) as potential biomarkers in early-stage NSCLC. METHODS:In training set, 25 ea...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-014-0149-3
更新日期:2014-11-25 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:Chronic obstructive pulmonary disease (COPD) is characterized by expiratory flow limitation, causing air trapping and lung hyperinflation. Hyperinflation leads to reduced exercise tolerance and poor quality of life in COPD patients. Total lung capacity (TLC) is an indicator of hyperinflation particularly in ...
journal_title:Respiratory research
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1186/s12931-014-0097-y
更新日期:2014-08-20 00:00:00
abstract:BACKGROUND:Accumulation of profibrotic myofibroblasts in fibroblastic foci (FF) is a crucial process for development of fibrosis during idiopathic pulmonary fibrosis (IPF) pathogenesis, and transforming growth factor (TGF)-β plays a key regulatory role in myofibroblast differentiation. Reactive oxygen species (ROS) has...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-016-0420-x
更新日期:2016-08-30 00:00:00
abstract::Signaling through G protein-coupled receptors (GPCRs) mediates numerous airway smooth muscle (ASM) functions including contraction, growth, and "synthetic" functions that orchestrate airway inflammation and promote remodeling of airway architecture. In this review we provide a comprehensive overview of the GPCRs that ...
journal_title:Respiratory research
pub_type: 杂志文章,评审
doi:
更新日期:2003-01-01 00:00:00
abstract:BACKGROUND:The coexistence of COPD and asthma is widely recognized but has not been well described. This study characterizes clinical features, spirometry, and chest CT scans of smoking subjects with both COPD and asthma. METHODS:We performed a cross-sectional study comparing subjects with COPD and asthma to subjects ...
journal_title:Respiratory research
pub_type: 临床试验,杂志文章,多中心研究
doi:10.1186/1465-9921-12-127
更新日期:2011-09-27 00:00:00
abstract:BACKGROUND:Asthma is a disease of varying severity and differing disease mechanisms. To date, studies aimed at stratifying asthma into clinically useful phenotypes have produced a number of phenotypes that have yet to be assessed for stability and to be validated in independent cohorts. The aim of this study was to def...
journal_title:Respiratory research
pub_type: 杂志文章
doi:10.1186/s12931-016-0482-9
更新日期:2016-12-15 00:00:00