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https://www.readbyqxmd.com/read/28817840/nuciferine-relaxes-tracheal-rings-via-the-blockade-of-vdlcc-and-nscc-channels
#1
Xiao Yang, Meng-Fei Yu, Jun Lei, Yong-Bo Peng, Ping Zhao, Lu Xue, Weiwei Chen, Li-Qun Ma, Qing-Hua Liu, Jinhua Shen
This study aimed to elucidate the mechanisms of nuciferine (a main aporphine alkaloid of lotus leaf extract), which can induce relaxation in contracted tracheal rings. Under Ca(2+)-free and 2 mM Ca(2+) conditions, we found that nuciferine had no effect on the resting muscle tone of tracheal rings. In contrast, nuciferine relaxed high K(+)-contracted mouse tracheal rings in a dose-dependent manner and inhibited both Ca(2+) influx and voltage-dependent L-type Ca(2+) channel currents induced by high K(+). Similarly, nuciferine also inhibited acetylcholine-induced contractions in mouse tracheal rings in a dose-dependent manner...
August 17, 2017: Planta Medica
https://www.readbyqxmd.com/read/28817310/semaphorins-and-their-roles-in-airway-biology-potential-as-therapeutic-targets
#2
Hesam Movassagh, Forough Khadem, Abdelilah S Gounni
Semaphorins are a large family of proteins originally identified as axon guidance cues which play a crucial role in neural development. They are also ubiquitously expressed beyond the nervous system and contribute to regulation of essential cell functions such as cell migration, proliferation, and adhesion. Binding of semaphorins to their receptors, including plexins and neuropilins, triggers diverse signaling pathways which are involved in the pathogenesis of various diseases from cancer to autoimmune and allergic disorders...
August 17, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28815937/the-airway-microbiota-in-early-cystic-fibrosis-lung-disease
#3
Katherine B Frayman, David S Armstrong, Keith Grimwood, Sarath C Ranganathan
Infection plays a critical role in the pathogenesis of cystic fibrosis (CF) lung disease. Over the past two decades, the application of molecular and extended culture-based techniques to microbial analysis has changed our understanding of the lungs in both health and disease. CF lung disease is a polymicrobial disorder, with obligate and facultative anaerobes recovered alongside traditional pathogens in varying proportions, with some differences observed to correlate with disease stage. While healthy lungs are not sterile, differences between the lower airway microbiota of individuals with CF and disease-controls are already apparent in childhood...
August 16, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28815017/autophagy-and-airway-fibrosis-is-there-a-link
#4
REVIEW
Anudeep Kota, Deepak Deshpande, Mehra Haghi, Brian Oliver, Pawan Sharma
In the past decade, an emerging process named "autophagy" has generated intense interest in many chronic lung diseases. Tissue remodeling and fibrosis is a common feature of many airway diseases, and current therapies do not prevent or reverse these structural changes. Autophagy has evolved as a conserved process for bulk degradation and recycling of cytoplasmic components to maintain basal cellular homeostasis and healthy organelle populations in the cell. Furthermore, autophagy serves as a cell survival mechanism and can also be induced by chemical and physical stress to the cell...
2017: F1000Research
https://www.readbyqxmd.com/read/28814849/tiotropium-bromide-exerts-anti-inflammatory-effects-during-resistive-breathing-an-experimental-model-of-severe-airway-obstruction
#5
Dimitrios Toumpanakis, Konstantinos Loverdos, Vassiliki Tzouda, Vyronia Vassilakopoulou, Eleni Litsiou, Christina Magkou, Vassiliki Karavana, Michael Pieper, Theodoros Vassilakopoulos
INTRODUCTION: Resistive breathing (RB), a hallmark of obstructive airway diseases, is characterized by strenuous contractions of the inspiratory muscles that impose increased mechanical stress on the lung. RB is shown to induce pulmonary inflammation in previous healthy animals. Tiotropium bromide, an anticholinergic bronchodilator, is also shown to exert anti-inflammatory effects. The effect of tiotropium on RB-induced pulmonary inflammation is unknown. METHODS: Adult rats were anesthetized, tracheostomized and breathed spontaneously through a two-way non-rebreathing valve...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28814848/pathophysiological-mechanism-of-long-term-noninvasive-ventilation-in-stable-hypercapnic-patients-with-copd-using-functional-respiratory-imaging
#6
Bita Hajian, Jan De Backer, Claire Sneyers, Francisca Ferreira, Katherine C Barboza, Glenn Leemans, Wim Vos, Wilfried De Backer
INTRODUCTION: Patients with severe COPD often develop chronic hypercapnic respiratory failure. Their prognosis worsens and they are more likely to develop exacerbations. This has major influence on the health-related quality of life. Currently, there is no information about the success of long-term noninvasive ventilation (NIV) among patients who receive NIV in acute settings. Also, little is known about the pathophysiological mechanism of NIV. METHODS: Ten Global Initiative for Obstructive Lung Disease stage III and IV COPD patients with respiratory failure who were hospitalized following acute exacerbation were treated with NIV using a Synchrony BiPAP device for 6 months...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28814783/mycoplasma-pneumoniae-associated-bronchiolitis-obliterans-following-acute-bronchiolitis
#7
Chengsong Zhao, Jinrong Liu, Haiming Yang, Li Xiang, Shunying Zhao
The characteristics of Mycoplasma pneumonia (M. pneumoniae)-associated bronchiolitis obliterans (BO) are not well known. We retrospectively reviewed 17 patients with M. pneumoniae-associated BO. All patients had M. pneumoniae-associated acute bronchiolitis prior to the development of BO. In the acute bronchiolitis stage, all patients had fever and cough; six patients also had wheezing and dyspnoea. BO was diagnosed approximately 1.5-8 months later based on clinical manifestations and chest high-resolution computed tomography (HRCT) findings...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28814498/both-ways-at-once-keeping-small-airways-clean
#8
REVIEW
Paul M Quinton
The small airways of the lungs are under constant assault from the pathogens and debris in the air that they must conduct to alveoli. Although hygiene is of paramount importance for respiratory health, the underlying principles of airway clearance have not been well integrated or established. Newly emerging concepts of simultaneous absorption and secretion of airway surface liquid (ASL) and the role of [Formula: see text] in the maturation of mucins have advanced from experimental evidence as well as observations from the congenital disease cystic fibrosis (CF) to present a novel model that integrates microanatomy with organ physiology to meet the constant challenge of cleaning small airways...
September 2017: Physiology
https://www.readbyqxmd.com/read/28814057/a-study-on-the-cough-augmentation-using-a-belt-driven-assistive
#9
Sang-Yoep Lee, Kyu-Jin Cho
Coughing is one of the most important mechanisms performed in human body in that it removes mucus. The absence of enough ability to remove mucus leads to accumulation of the mucus on the airway, followed by possible complications such as pneumonia and atelectasis. Patients with diseases or disorders such as spinal cord injury have weakened ability in coughing. So far, there have been various treatments such as intubation surgery, mechanical insufflation-exsufflation or manual assistance provided by paramedic...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28812530/feline-herpesvirus-pneumonia-investigations-into-the-pathogenesis
#10
Josep Maria Monne Rodriguez, Gail Leeming, Kernt Köhler, Anja Kipar
Feline herpesvirus type 1 (FeHV-1) is one of the etiological agents of feline respiratory disease. FeHV-1 is an epitheliotropic and cytopathic virus that mainly causes rhinitis and conjunctivitis, although pneumonia is also occasionally seen. In this study, the authors investigated the pathogenesis of FeHV-1-associated pneumonia, comparing natural cases with viral infection of tracheal ring and cell cultures in vitro, using histology, immunohistology, double immunofluorescence, and transmission electron microscopy as investigative tools...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28812176/effects-of-sodium-houttuyfonate-on-pulmonary-inflammation-in-copd-model-rats
#11
Zhonghua Wu, Bo Tan, Haiying Zhang, Yinuo Guo, Yanjie Tu, Furong Qiu, Aidong Yang
The anti-inflammatory effect of sodium houttuyfonate (SH), an herbal-originated drug that used in China clinically, was investigated on chronic obstructive pulmonary disease (COPD) inflammatory model rats induced by combination usage of cigarette smoke (CS) and lipopolysaccharide (LPS). The morphology of the lung tissue, the expression levels of cytokines in the bronchoalveolar lavage fluid (BALF), the protein levels of TLR4, NF-κB p65, and SIGIRR, and the mRNA levels of TLR4, MyD88, NF-κB p65, and SIGIRR in lung tissues were investigated, respectively...
August 15, 2017: Inflammation
https://www.readbyqxmd.com/read/28811823/protective-barrier-properties-of-rhinosectan-%C3%A2-spray-containing-xyloglucan-on-an-organotypic-3d-airway-tissue-model-mucilair-results-of-an-in-vitro-study
#12
Barbara De Servi, Francesco Ranzini, Núria Piqué
BACKGROUND: To evaluate barrier protective properties of Rhinosectan(®) spray, a medical device containing xyloglucan, on nasal epithelial cells (MucilAir). METHODS: MucilAir-Nasal, a three-dimensional organotypic (with different cell types) airway tissue model, was treated with the medical device Rhinosectan(®) (30 µL) or with controls (Rhinocort-budesonide-or saline solution). The protective barrier effects of Rhinosectan(®) were evaluated by: TEER (trans-epithelial electrical resistance) (preservation of tight junctions), Lucifer Yellow assay (preservation of paracellular flux) and confocal immunofluorescence microscopy (localization of tight junction proteins)...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28809842/noninvasive-sampling-of-mucosal-lining-fluid-for-the-quantification-of-in-vivo-upper-airway-immune-mediator-levels
#13
Helene M Wolsk, Bo L Chawes, Jonathan Thorsen, Jakob Stokholm, Klaus Bønnelykke, Susanne Brix, Hans Bisgaard
This protocol describes noninvasive sampling of undisturbed upper airway mucosal lining fluid. It also details the extraction procedure used prior to the analysis of immune mediators in fluid eluates for the study of the airway topical immune signature, without the need for stimulation procedures (often used by other techniques). The mucosal lining fluid is sampled on a strip of filter paper placed at the anterior part of the inferior turbinate and left for 2 min of absorption. Analytes are eluted from the filter papers, and the extracted protein-based eluates are analyzed by an electrochemiluminescence-based immunoassay, allowing for the high-sensitivity quantification of low- and high-level analytes in the same sample...
August 7, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28809368/deep-neck-infections-a-single-center-analysis-of-63-cases
#14
P Kauffmann, R Cordesmeyer, M Tröltzsch, C Sömmer, R Laskawi
BACKGROUND AND PURPOSE: With the use of antibiotic therapy, the incidence of deep neck infections has decreased in recent decades. The aim of this investigation was to review the clinical course and the management of deep neck infections in our department, compare them to the experiences of the common literature and identify predisposing factors for lethal complications. MATERIAL AND METHODS: In this single-center analysis, 63 patients with deep neck infections were treated surgically...
August 15, 2017: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/28808008/mathematical-model-reveals-role-of-nucleotide-signaling-in-airway-surface-liquid-homeostasis-and-its-dysregulation-in-cystic-fibrosis
#15
Conner I Sandefur, Richard C Boucher, Timothy C Elston
Mucociliary clearance is composed of three components (i.e., mucin secretion, airway surface hydration, and ciliary-activity) which function coordinately to clear inhaled microbes and other foreign particles from airway surfaces. Airway surface hydration is maintained by water fluxes driven predominantly by active chloride and sodium ion transport. The ion channels that mediate electrogenic ion transport are regulated by extracellular purinergic signals that signal through G protein-coupled receptors. These purinoreceptors and the signaling pathways they activate have been identified as possible therapeutic targets for treating lung disease...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28805308/lymphocyte-profile-and-cytokine-mrna-expression-in-peripheral-blood-mononuclear-cells-of-patients-with-recurrent-respiratory-papillomatosis-suggest-dysregulated-cytokine-mrna-response-and-impaired-cytotoxic-capacity
#16
Anna Holm, Olga Nagaeva, Ivan Nagaev, Christos Loizou, Göran Laurell, Lucia Mincheva-Nilsson, Karin Nylander, Katarina Olofsson
OBJECTIVES: Recurrent respiratory papillomatosis (RRP) is a relatively rare, chronic disease caused by Human Papilloma Virus (HPV) 6 and 11, and characterized by wart-like lesions in the airway affecting voice and respiratory function. The majority of HPV infections are asymptomatic and resolve spontaneously, however, some individuals are afflicted with persistent HPV infections. Failure to eliminate HPV 6 and 11 due to a defect immune responsiveness to these specific genotypes is proposed to play a major role in the development of RRP...
August 14, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28804483/the-impact-of-western-diet-and-nutrients-on-the-microbiota-and-immune-response-at-mucosal-interfaces
#17
REVIEW
Donjete Statovci, Mònica Aguilera, John MacSharry, Silvia Melgar
Recent findings point toward diet having a major impact on human health. Diets can either affect the gut microbiota resulting in alterations in the host's physiological responses or by directly targeting the host response. The microbial community in the mammalian gut is a complex and dynamic system crucial for the development and maturation of both systemic and mucosal immune responses. Therefore, the complex interaction between available nutrients, the microbiota, and the immune system are central regulators in maintaining homeostasis and fighting against invading pathogens at mucosal sites...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28804222/chemical-chaperone-of-endoplasmic-reticulum-stress-inhibits-epithelial-mesenchymal-transition-induced-by-tgf-%C3%AE-1-in-airway-epithelium-via-the-c-src-pathway
#18
Heung-Man Lee, Ju-Hyung Kang, Jae-Min Shin, Seoung-Ae Lee, Il-Ho Park
Epithelial-mesenchymal transition (EMT) is a biological process that allows epithelial cells to assume a mesenchymal cell phenotype. EMT is considered as a therapeutic target for several persistent inflammatory airway diseases related to tissue remodeling. Herein, we investigated the role of endoplasmic reticulum (ER) stress and c-Src in TGF-β1-induced EMT. A549 cells, primary nasal epithelial cells (PNECs), and inferior nasal turbinate organ cultures were exposed to 4-phenylbutylic acid (4PBA) or PP2 and then stimulated with TGF-β1...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28803775/pulmonary-function-in-patients-with-eosinophilic-chronic-rhinosinusitis
#19
Kensuke Uraguchi, Shin Kariya, Seiichiro Makihara, Mitsuhiro Okano, Takenori Haruna, Aiko Oka, Rumi Fujiwara, Yohei Noda, Kazunori Nishizaki
OBJECTIVE: There is a close relationship between upper and lower respiratory tract diseases. Chronic rhinosinusitis patients frequently have lung diseases including asthma and chronic obstructive pulmonary disease. Eosinophilic chronic rhinosinusitis is considered a refractory and intractable subtype of chronic rhinosinusitis. However, there has been no report on pulmonary function in patients with eosinophilic chronic rhinosinusitis. The purpose of this study is to examine the pulmonary function in eosinophilic chronic rhinosinusitis patients and non-eosinophilic chronic rhinosinusitis patients, and evaluate clinical factors associated with the pulmonary function of these patients...
August 10, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28803336/transgenic-mice-overexpressing-vitamin-d-receptor-vdr-show-anti-inflammatory-effects-in-lung-tissues
#20
Masaki Ishii, Yasuhiro Yamaguchi, Kyoko Isumi, Sumito Ogawa, Masahiro Akishita
Vitamin D insufficiency is increasingly recognized as a prevalent problem worldwide, especially in patients with a chronic lung disease. Chronic obstructive pulmonary disease (COPD) is a type of chronic inflammatory lung disease. Previous clinical studies have shown that COPD leads to low vitamin D levels, which further increase the severity of COPD. Vitamin D homeostasis represents one of the most important factors that potentially determine the severity of COPD. Nonetheless, the mechanisms underlying the anti-inflammatory effects of vitamin D receptor (VDR) in lung tissues are still unclear...
August 12, 2017: Inflammation
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