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https://www.readbyqxmd.com/read/28102118/myeloid-cells-in-asthma
#1
Bart N Lambrecht, Emma K Persson, Hamida Hammad
Asthma is a heterogeneous chronic inflammatory disorder of the airways, and not surprisingly, many myeloid cells play a crucial role in pathogenesis. Antigen-presenting dendritic cells are the first to recognize the allergens, pollutants, and viruses that are implicated in asthma pathogenesis, and subsequently initiate the adaptive immune response by migrating to lymph nodes. Eosinophils are the hallmark of type 2 inflammation, releasing toxic compounds in the airways and contributing to airway remodeling. Mast cells and basophils control both the early- and late-phase allergic response and contribute to alterations in smooth muscle reactivity...
January 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28093362/hypoxia-inducible-factor-1%C3%AE-inhibition-modulates-airway-hyperresponsiveness-and-nitric-oxide-levels-in-a-balb-c-mouse-model-of-asthma
#2
Carola Dewitz, Elisa McEachern, Stephanie Shin, Kathryn Akong, Dale G Nagle, David H Broide, Praveen Akuthota, Laura E Crotty Alexander
: Hypoxia inducible factor (HIF)-1α is a master regulator of inflammation and is upregulated in alveolar macrophages and lung parenchyma in asthma. HIF-1α regulates select pathways in allergic inflammation, and thus may drive particular asthma phenotypes. This work examines the role of pharmacologic HIF-1α inhibition in allergic inflammatory airway disease (AIAD) pathogenesis in BALB/c mice, which develop an airway hyperresponsiveness (AHR) asthma phenotype. Systemic treatment with HIF-1α antagonist YC-1 suppressed the increase in HIF-1α expression seen in control AIAD mice...
January 13, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28063042/murine-models-of-allergic-asthma
#3
Eline Haspeslagh, Nincy Debeuf, Hamida Hammad, Bart N Lambrecht
Allergic asthma is a heterogeneous inflammatory lung disease affecting millions of people worldwide and with a steadily increasing incidence. Mouse models have been of utmost importance in uncovering key inflammatory cell types, cytokines, and pathways in the development and maintenance of allergic asthma. Historically, the mainstay in experimental asthma research was sensitizing rodents to the model protein antigen ovalbumin (OVA) with the pro-Th2 adjuvant aluminum hydroxide, followed by repetitive OVA exposures to the airways to initiate a Th2-skewed adaptive immune response leading to eosinophilic airway inflammation and airway hyperreactivity (AHR)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28054460/clinical-importance-of-cross-sectional-area-of-intercostal-muscles-in-patients-with-chronic-obstructive-pulmonary-disease
#4
Sunmi Ju, Seung Jun Lee, Mi Jung Park, Yu Ji Cho, Yi Yeong Jeong, Kyung Nyeo Jeon, Kyung Soo Bae, Ho Cheol Kim, Jong Deog Lee
INTRODUCTION: Limb muscle wasting is one of main systemic manifestation of chronic obstructive pulmonary disease (COPD). However, the change of respiratory muscle is unclear. OBJECTIVES: This study assessed the cross-sectional area (CSA) of the intercostal muscles (ICMs) in patients with COPD, using chest computed tomography (CT) and determined its association with the clinical characteristics of COPD. METHODS: We retrospectively reviewed 60 patients with stable COPD and compared them with 30 controls...
January 5, 2017: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28044041/visual-diagnosis-a-child-with-presumed-reactive-airway-disease-pectus-carinatum-and-aortic-root-dilation
#5
REVIEW
Aamir Jeewa, Shaine A Morris, William J Dreyer, Iki Adachi, Susan W Denfield, E Dean McKenzie
No abstract text is available yet for this article.
January 2017: Pediatrics in Review
https://www.readbyqxmd.com/read/28031454/rad-reactive-airways-disease-or-really-asthma-disease
#6
Lindsey C Douglas, Katherine J Feder
No abstract text is available yet for this article.
January 2017: Pediatrics
https://www.readbyqxmd.com/read/28007622/control-of-ventilation-in-health-and-disease
#7
REVIEW
Susmita Chowdhuri, M Safwan Badr
Control of ventilation occurs at different levels of the respiratory system via a negative feedback system that allows for precise regulation of levels of arterial carbon dioxide and oxygen. Mechanisms for ventilatory instability leading to sleep disordered breathing include changes in respiratory rhythm genesis and chemoresponsiveness to hypoxia and hypercapnia, cerebrovascular reactivity, abnormal chest wall and airway reflexes, and sleep state oscillations. One can potentially stabilize breathing during sleep-related breathing disorders by identifying one or more of these pathophysiological mechanisms...
December 19, 2016: Chest
https://www.readbyqxmd.com/read/27995132/distal-airway-dysfunction-identifies-pulmonary-inflammation-in-asymptomatic-smokers
#8
Kenneth I Berger, Deepak R Pradhan, Roberta M Goldring, Beno W Oppenheimer, William N Rom, Leopoldo N Segal
Smoking induced inflammation leads to distal airway destruction. However, the relationship between distal airway dysfunction and inflammation remains unclear, particularly in smokers prior to the development of airway obstruction. Seven normal controls and 16 smokers without chronic obstructive pulmonary disease (COPD) were studied. Respiratory function was assessed using the forced oscillation technique (FOT). Abnormal FOT was defined as elevated resistance at 5 Hz (R5). Parameters reflecting distal lung function included frequency dependence of resistance (R5-20) and dynamic elastance (X5)...
October 2016: ERJ Open Research
https://www.readbyqxmd.com/read/27959278/modulatory-potential-of-resveratrol-during-lung-inflammatory-disease
#9
José Eduardo Vargas, André Arigony Souto, Paulo Márcio Condessa Pitrez, Renato Tetelbom Stein, Bárbara Nery Porto
Neutrophils are the first cells to achieve the sites of infection or inflammation in the lungs. The massive accumulation of these cells is associated with acute and chronic lung injury. Therefore, they have been implicated in the pathogenesis of many lung diseases through the release of reactive oxygen intermediates, proteolytic enzymes and Neutrophil Extracellular Traps (NETs). The excessive and continuous release of NETs, fibers composed by decondensed chromatin coated with neutrophil proteins, are associated to the impairment of lung function in different pathological settings...
November 2016: Medical Hypotheses
https://www.readbyqxmd.com/read/27940703/use-of-gastroesophageal-reflux-medications-in-premature-infants-after-nicu-discharge
#10
Jo Ann D'Agostino, Molly Passarella, Ashley E Martin, Scott A Lorch
OBJECTIVES: To describe the epidemiology and management of gastroesophageal reflux (GER) medications started in the first year of life for premature infants. METHODS: Retrospective review of a cohort of infants ≤35 weeks' gestation presenting for care by 168 days of age to a 30-site network between 2005 and 2009 (n = 2217) and followed to 3 years of age. Medication frequency, types, and duration of use were assessed. Logistic regression identified factors associated with treatment...
December 2016: Pediatrics
https://www.readbyqxmd.com/read/27940684/cytokine-elevation-in-sudden-death-with-respiratory-syncytial-virus-a-case-report-of-2-children
#11
Yu Kakimoto, Yoshihisa Seto, Eriko Ochiai, Fumiko Satoh, Motoki Osawa
Respiratory syncytial virus (RSV) is the most common viral cause of bronchiolitis and pneumonia in young children worldwide. Premature birth, bronchopulmonary dysplasia, congenital heart disease, and Down syndrome are risk factors for high mortality and prolonged morbidity after RSV infection. Conversely, many previously healthy, full-term children are also admitted to the hospital because of RSV, and some of them experience severe sequelae or die due to the virus. Various complications of RSV infection have been reported, such as encephalopathy, encephalitis, and cardiomyopathy...
December 2016: Pediatrics
https://www.readbyqxmd.com/read/27935998/pro-resolving-effects-of-resolvin-d2-in-ltd4-and-tnf-%C3%AE-pre-treated-human-bronchi
#12
Rayan Khaddaj-Mallat, Chantal Sirois, Marco Sirois, Edmond Rizcallah, Sofia Marouan, Caroline Morin, Éric Rousseau
Inflammation is a major burden in respiratory diseases, resulting in airway hyperresponsiveness. Our hypothesis is that resolution of inflammation may represent a long-term solution in preventing human bronchial dysfunctions. The aim of the present study was to assess the anti-inflammatory effects of RvD2, a member of the D-series resolving family, with concomitant effects on ASM mechanical reactivity. The role and mode of action of RvD2 were assessed in an in vitro model of human bronchi under pro-inflammatory conditions, induced either by 1 μM LTD4 or 10 ng/ml TNF-α pre-treatment for 48h...
2016: PloS One
https://www.readbyqxmd.com/read/27920567/evaluation-of-bode-index-and-its-relationship-with-systemic-inflammation-mediated-by-proinflammatory-biomarkers-in-patients-with-copd
#13
Naushad Ahmad Khan, Mradul Kumar Daga, Istaq Ahmad, Govind Mawari, Suman Kumar, Naresh Kumar, Syed Akhter Husain
INTRODUCTION: BODE index, a multidimensional grading system which is based on Body mass index, airway Obstruction, Dyspnea scale, and Exercise capacity, has been increasingly used for the evaluation of chronic obstructive pulmonary disease (COPD). Many of the systemic manifestations of COPD are shown to be mediated by elevated levels of proinflammatory biomarkers. OBJECTIVE: We aimed to investigate the relationship between the BODE index, its components, disease severity, and proinflammatory biomarkers like C-reactive protein (CRP), tumor necrosis factor (TNF)-α, and interleukin (IL)-6...
2016: Journal of Inflammation Research
https://www.readbyqxmd.com/read/27864677/glucocorticoids
#14
Ian M Adcock, Sharon Mumby
The most effective anti-inflammatory drugs used to treat patients with airways disease are topical glucocorticosteroids (GCs). These act on virtually all cells within the airway to suppress airway inflammation or prevent the recruitment of inflammatory cells into the airway. They also have profound effects on airway structural cells to reverse the effects of disease on their function. Glucorticosteroids act via specific receptors-the glucocorticosteroid receptor (GR)-which are a member of the nuclear receptor family...
November 19, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27842498/least-absolute-shrinkage-and-selection-operator-type-methods-for-the-identification-of-serum-biomarkers-of-overweight-and-obesity-simulation-and-application
#15
Monica M Vasquez, Chengcheng Hu, Denise J Roe, Zhao Chen, Marilyn Halonen, Stefano Guerra
BACKGROUND: The study of circulating biomarkers and their association with disease outcomes has become progressively complex due to advances in the measurement of these biomarkers through multiplex technologies. The Least Absolute Shrinkage and Selection Operator (LASSO) is a data analysis method that may be utilized for biomarker selection in these high dimensional data. However, it is unclear which LASSO-type method is preferable when considering data scenarios that may be present in serum biomarker research, such as high correlation between biomarkers, weak associations with the outcome, and sparse number of true signals...
November 14, 2016: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/27831562/mitochondrial-transfer-of-mesenchymal-stem-cells-effectively-protects-corneal-epithelial-cells-from-mitochondrial-damage
#16
Dan Jiang, Fei Gao, Yuelin Zhang, David Sai Hung Wong, Qing Li, Hung-Fat Tse, Goufeng Xu, Zhendong Yu, Qizhou Lian
Recent studies have demonstrated that mesenchymal stem cells (MSCs) can donate mitochondria to airway epithelial cells and rescue mitochondrial damage in lung injury. We sought to determine whether MSCs could donate mitochondria and protect against oxidative stress-induced mitochondrial dysfunction in the cornea. Co-culturing of MSCs and corneal epithelial cells (CECs) indicated that the efficiency of mitochondrial transfer from MSCs to CECs was enhanced by Rotenone (Rot)-induced oxidative stress. The efficient mitochondrial transfer was associated with increased formation of tunneling nanotubes (TNTs) between MSCs and CECs, tubular connections that allowed direct intercellular communication...
November 10, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27801552/th17-responses-to-collagen-type-v-k%C3%AE-1-tubulin-and-vimentin-are-present-early-in-human-development-and-persist-throughout-life
#17
J A Sullivan, E Jankowska-Gan, S Hegde, M A Pestrak, V V Agashe, A C Park, M E Brown, J F Kernien, D S Wilkes, D B Kaufman, D S Greenspan, W J Burlingham
T helper 17 (Th17)-dependent autoimmune responses can develop after heart or lung transplantation and are associated with fibro-obliterative forms of chronic rejection; however, the specific self-antigens involved are typically different from those associated with autoimmune disease. To investigate the basis of these responses, we investigated whether removal of regulatory T cells or blockade of function reveals a similar autoantigen bias. We found that Th17 cells specific for collagen type V (Col V), kα1-tubulin, and vimentin were present in healthy adult peripheral blood mononuclear cells, cord blood, and fetal thymus...
November 1, 2016: American Journal of Transplantation
https://www.readbyqxmd.com/read/27777975/the-role-for-neutrophil-extracellular-traps-in-cystic-fibrosis-autoimmunity
#18
Sladjana Skopelja, B JoNell Hamilton, Jonathan D Jones, Mei-Ling Yang, Mark Mamula, Alix Ashare, Alex H Gifford, William F C Rigby
While respiratory failure in cystic fibrosis (CF) frequently associates with chronic infection by Pseudomonas aeruginosa, no single factor predicts the extent of lung damage in CF. To elucidate other causes, we studied the autoantibody profile in CF and rheumatoid arthritis (RA) patients, given the similar association of airway inflammation and autoimmunity in RA. Even though we observed that bactericidal permeability-increasing protein (BPI), carbamylated proteins, and citrullinated proteins all localized to the neutrophil extracellular traps (NETs), which are implicated in the development of autoimmunity, our study demonstrates striking autoantibody specificity in CF...
October 20, 2016: JCI Insight
https://www.readbyqxmd.com/read/27776186/serum-reactive-oxygen-metabolite-levels-predict-severe-exacerbations-of-asthma
#19
Keitaro Nakamoto, Masato Watanabe, Mitsuru Sada, Toshiya Inui, Masuo Nakamura, Kojiro Honda, Hiroo Wada, Yu Mikami, Hirotaka Matsuzaki, Masafumi Horie, Satoshi Noguchi, Yasuhiro Yamauchi, Hikari Koyama, Toshiyuki Kogane, Tadashi Kohyama, Hajime Takizawa
BACKGROUND AND PURPOSE: Bronchial asthma (BA) is a chronic airway disease characterized by airway hyperresponsiveness and remodeling, which are intimately linked to chronic airway inflammation. Reactive oxygen species (ROS) such as hydrogen peroxide are generated by inflammatory cells that are involved in the pathogenesis of BA. However, the role of ROS in the management of BA patients is not yet clear. We attempted to determine the role of ROS as a biomarker in the clinical setting of BA...
2016: PloS One
https://www.readbyqxmd.com/read/27746262/caffeic-acid-phenethyl-ester-alleviates-asthma-by-regulating-the-airway-microenvironment-via-the-ros-responsive-mapk-akt-pathway
#20
REVIEW
Yuan Ma, Jia-Xiang Zhang, Ya-Nan Liu, Ai Ge, Hao Gu, Wang-Jian Zha, Xiao-Ning Zeng, Mao Huang
In the pathophysiology of asthma, structural cell dysfunction and concomitant microenvironment changes in airways are crucial to pathological progression, which involves oxidative stress. Caffeic acid phenethyl ester (CAPE) is an active anti-oxidative component obtained from propolis, and has been shown to have beneficial effects on several respiratory disorders, such as chronic obstructive pulmonary disease and lung cancer. However, the impact of CAPE on asthma is not well understood. Therefore, this study investigated the advantages of using CAPE to treat asthma and demonstrated the roles of CAPE in the regulation of airway microenvironments...
December 2016: Free Radical Biology & Medicine
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