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https://www.readbyqxmd.com/read/27913423/bronchodilatory-effect-of-deep-inspiration-in-freshly-isolated-sheep-lungs
#1
William D Wong, Lu Wang, Peter D Paré, Chun Y Seow
Taking a big breath is known to reverse bronchoconstriction induced by bronchochallenge in healthy subjects; this bronchodilatory effect of deep inspiration (DI) is diminished in asthmatics. The mechanism underlying the DI effect is not clear. Observations from experiments using isolated airway smooth muscle (ASM) preparations and airway segments suggest that straining of ASM due to DI could lead to bronchodilation, possibly due to strain-induced reduction in ASM contractility. However, factors external to the lung cannot be excluded as potential causes for the DI effect...
December 2, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27912076/activating-transcription-factor-3-is-essential-for-cigarette-smoke-induced-mucin-expression-via-interaction-with-activator-protein-1
#2
Yan-Ping Wu, Yin-Fang Wu, Chao Zhang, Hong-Bin Zhou, Chao Cao, Miao Li, Chen Zhu, Song-Min Ying, Zhi-Hua Chen, Hua-Hao Shen, Wen Li
Mucus hypersecretion is an important pathologic feature of chronic obstructive pulmonary disease. Activating transcription factor 3 (ATF3) is an adaptive-response gene that participates in various cellular processes. However, little is known about its role in cigarette smoke (CS)-induced mucus hyperproduction. This study aimed to investigate the role and molecular mechanisms of ATF3 in CS-induced Mucin 5AC (MUC5AC) expression. ATF3 was elevated in lung tissues of mice exposed to CS for 12 weeks. Treatment with CS extract significantly induced ATF3 expression and MUC5AC production in human bronchial epithelial cells, NCI-H292, and mouse tracheal epithelial cells...
November 29, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27902411/non-typeable-haemophilus-influenzae-biofilm-production-and-severity-in-lower-respiratory-tract-infections-in-a-tertiary-hospital-in-mexico
#3
Michel Fernando Martínez-Reséndez, Juan Manuel González-Chávez, Elvira Garza-González, Lorena Nefertiti Castro-Fuentes, Jessica Lizzeth Gutiérrez-Ferman, Gabriela Echániz-Aviles, Adrián Camacho-Ortíz, María Noemí Carnalla-Barajas, Araceli Soto-Noguerón, Héctor Jesús Maldonado-Garza, Cristina Liliana Hernández-Balboa, Jorge M Llaca-Díaz, Samantha Flores-Treviño
Non-typeable Haemophilus influenzae (NTHi) is a common opportunistic bacterial pathogen that primarily infects the respiratory mucosa. This study was conducted to assess clinical and microbiological data related to disease severity in patients with lower respiratory tract infections caused by NTHi in a tertiary care hospital in Mexico. NTHi isolates were subjected to serotyping, antimicrobial susceptibility evaluation, and analyses of β-lactamase production, genetic relatedness, and biofilm formation. Clinical and demographic data were retrieved from patients' records...
October 17, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27889361/adult-bronchiectasis-patients-a-first-look-at-the-united-states-bronchiectasis-research-registry
#4
Timothy R Aksamit, Anne E O'Donnell, Alan Barker, Kenneth N Olivier, Kevin L Winthrop, M Leigh Anne Daniels, Margaret Johnson, Edward Eden, David Griffith, Michael Knowles, Mark Metersky, Matthias Salathe, Byron Thomashow, Gregory Tino, Gerard Turino, Betsy Carretta, Charles L Daley
OBJECTIVE: We sought to describe the characteristics of adult bronchiectasis patients enrolled in the United States Bronchiectasis Research Registry (BRR). METHODS: The BRR is a database of non-cystic fibrosis bronchiectasis (NCFB) patients enrolled at 13 sites within the United States. Baseline demographic, spirometric, imaging, microbiologic, and therapeutic data were entered into a central web-based database. Patients were subsequently analyzed by the presence NTM...
November 23, 2016: Chest
https://www.readbyqxmd.com/read/27881407/prophylactic-and-therapeutic-treatment-with-flavonone-sakuranetin-ameliorates-lps-induced-acute-lung-injury
#5
Márcia Isabel Bittencourt-Mernak, Nathália Montouro Pinheiro, Fernanda P Roncon Santana, Marina P Guerreiro, Beatriz Mangueira Saraiva-Romanholo, Simone S Grecco, Luciana C Caperuto, Raphael J F Felizardo, Niels Olsen Saraiva Câmara, Iolanda F L Calvo Tibério, Mílton A Martins, João Henrique G Lago, Carla Máximo Prado
BACKGROUND AND PURPOSE: Sakuranetin is the main isolate flavonoid from Baccharis retusa (Asteraceae) leaves and exhibits anti-inflammatory and anti-oxidative activities. Acute respiratory distress syndrome is an acute failure of the respiratory system for which effective treatment is urgently necessary. This study investigated the preventive and therapeutic effects of sakuranetin on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice. EXPERIMENTAL APPROACH: Animals were treated with intranasal sakuranetin 30 minutes before or 6 hours after instillation of LPS...
November 23, 2016: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27842540/the-impact-of-low-frequency-low-force-cyclic-stretching-of-human-bronchi-on-airway-responsiveness
#6
Morgan Le Guen, Stanislas Grassin-Delyle, Emmanuel Naline, Amparo Buenestado, Marion Brollo, Elisabeth Longchampt, Philippe Kleinmann, Philippe Devillier, Christophe Faisy
BACKGROUND: In vivo, the airways are constantly subjected to oscillatory strain (due to tidal breathing during spontaneous respiration) and (in the event of mechanical ventilation) positive pressure. This exposure is especially problematic for the cartilage-free bronchial tree. The effects of cyclic stretching (other than high-force stretching) have not been extensively characterized. Hence, the objective of the present study was to investigate the functional and transcriptional response of human bronchi to repetitive mechanical stress caused by low-frequency, low-force cyclic stretching...
November 14, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27834817/classification-of-27-tumor-associated-antigens-by-histochemical-analysis-of-36-freshly-resected-lung-cancer-tissues
#7
Gene Kurosawa, Mototaka Sugiura, Yoshinobu Hattori, Hiroyuki Tsuda, Yoshikazu Kurosawa
In previous studies, we identified 29 tumor-associated antigens (TAAs) and isolated 488 human monoclonal antibodies (mAbs) that specifically bind to one of the 29 TAAs. In the present study, we performed histochemical analysis of 36 freshly resected lung cancer tissues by using 60 mAbs against 27 TAAs. Comparison of the staining patterns of tumor cells, bronchial epithelial cells, and normal pulmonary alveolus cells and interalveolar septum allowed us to determine the type and location of cells that express target molecules, as well as the degree of expression...
November 8, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27834695/genome-sequences-of-malonate-positive-cronobacter-sakazakii-serogroup-o-2-sequence-type-64-strains-cdc-1121-73-and-gk1025-isolated-from-human-bronchial-wash-and-a-powdered-infant-formula-manufacturing-plant
#8
H R Chase, G R Gopinath, J Gangiredla, I R Patel, M H Kothary, L Carter, V Sathyamoorthy, B Lee, E Park, Y J Yoo, T J Chung, H Choi, S Jun, J Park, S Jeong, M Kim, F Reich, G Klein, B D Tall
We introduce draft genome sequences of strains CDC1121-73 (human bronchial wash isolate) and GK1025 (powdered infant formula manufacturing facility isolate), which are both malonate-positive Cronobacter sakazakii serogroup O:2, sequence type 64. Assemblies for these strains have sizes of 4,442,307 and 4,599,266 bp and % G+C contents of 56.9 and 56.7, respectively.
November 10, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27832204/expression-of-the-lncrna-maternally-expressed-gene-3-meg3-contributes-to-the-control-of-lung-cancer-cell-proliferation-by-the-rb-pathway
#9
Traci L Kruer, Susan M Dougherty, Lindsey Reynolds, Elizabeth Long, Tanya de Silva, William W Lockwood, Brian F Clem
Maternally expressed gene 3 (MEG3, mouse homolog Gtl2) encodes a long noncoding RNA (lncRNA) that is expressed in many normal tissues, but is suppressed in various cancer cell lines and tumors, suggesting it plays a functional role as a tumor suppressor. Hypermethylation has been shown to contribute to this loss of expression. We now demonstrate that MEG3 expression is regulated by the retinoblastoma protein (Rb) pathway and correlates with a change in cell proliferation. Microarray analysis of mouse embryonic fibroblasts (MEFs) isolated from mice with genetic deletion of all three Rb family members (TKO) revealed a significant silencing of Gtl2/MEG3 expression compared to WT MEFs, and re-expression of Gtl2/MEG3 caused decrease in cell proliferation and increased apoptosis...
2016: PloS One
https://www.readbyqxmd.com/read/27817752/right-aortic-arch-with-isolation-of-the-left-subclavian-artery-a-rare-association-with-airway-obstruction
#10
Putri Yubbu, Haifa A Latiff, Abdel Moneim Adam Abbaker
We present two interesting cases of isolated left subclavian artery from the pulmonary artery with symptoms of upper airway obstruction. The first patient had tetralogy of Fallot, pulmonary artery sling, bilateral superior caval veins, and left bronchial isomerism, suggesting heterotaxy syndrome. The second patient had a right aortic arch, isolated left subclavian artery, and bilateral arterial ducts. These two cases are interesting because of their rarity and uncommon presentation.
November 7, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27796942/comparison-of-mirna-profiling-during-airway-epithelial-repair-in-undifferentiated-and-differentiated-cells-in-vitro
#11
Wojciech Langwinski, Beata Narozna, Peter M Lackie, John W Holloway, Aleksandra Szczepankiewicz
Respiratory epithelium is a highly integrated structure that efficiently protects lungs from extrinsic irritants thanks to rapid repair of the wound. The repair is a complex process that requires coordinated expression of networks of genes. Plausible regulators of this process are microRNAs. We investigated whether global miRNA silencing influences the epithelial repair, and whether changes in miRNA expression profile during repair are similar between two bronchial epithelial cell cultures: differentiated and undifferentiated cells...
October 28, 2016: Journal of Applied Genetics
https://www.readbyqxmd.com/read/27792269/impaired-immunosuppressive-effect-of-bronchoalveolar-mesenchymal-stem-cells-in-hypersensitivity-pneumonitis-preliminary-findings
#12
Enikő Balogh, Béla Nagy, Ágnes Gyetvai, Zsolt Bene, Zoltán Hendrik, Viktória Jeney, Péter Nagy, Ágnes Papp, József Balla, György Balla, János Kappelmayer, Béla Nagy
BACKGROUND: Bronchoalveolar mesenchymal stem cells (MSCs) play an important role in the maintenance of lung integrity. Therapeutic application of bone marrow-derived MSCs reduced chronic bronchial inflammation in idiopathic pulmonary fibrosis, and improved the ratio of survivors in sepsis with pneumonia. This study investigated the effect of MSCs from bronchoalveolar lavage fluid (BALF) of hypersensitivity pneumonitis (HP) on T-cell function under in vitro conditions. METHODS: Bronchoalveolar MSCs were obtained via bronchoscopy with BAL from children with severe subacute HP...
October 28, 2016: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/27791986/human-airway-smooth-muscle-cell-proliferation-from-asthmatics-is-negatively-regulated-by-semaphorin3a
#13
Hesam Movassagh, Nazanin Tatari, Lianyu Shan, Latifa Koussih, Duaa Alsubait, Mahdi Khattabi, Naresh S Redhu, Michael Roth, Michael Tamm, Jamila Chakir, Abdelilah S Gounni
Airway smooth muscle (ASM) hyperplasia is a key feature of airway remodeling in development of lung diseases such as asthma. Anomalous proliferation of ASM cells directly contributes to ASM hyperplasia. However, the molecular mechanisms controlling ASM cell proliferation are not completely understood. Semaphorins are versatile regulators of various cellular processes including cell growth and proliferation. The role of semaphorins in ASM cell proliferation has remained to be addressed. Here, we report that semaphorin 3A (Sema3A) receptor, neuropilin 1 (Nrp1), is expressed on human ASM cells (HASMC) isolated from healthy and asthmatic donors and treatment of these cells with exogenous Sema3A inhibits growth factor-induced proliferation...
October 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27787629/lymphangiogenesis-in-rat-asthma-model
#14
Aigul Moldobaeva, John Jenkins, Qiong Zhong, Elizabeth M Wagner
Although bronchial angiogenesis has been well documented in allergic asthma, lymphangiogenesis has not been widely studied. Therefore, we evaluated changes in lung lymphatics in a rat model of allergen-induced asthma using house dust mite (Der p 1; 100 μg/challenge). Additionally, properties of isolated lung lymphatic endothelial cells (CD45(-), CD141(+), LYVE-1(+), Prox-1(+)) were studied in vitro. Three weeks after the onset of intranasal allergen exposure (twice-weekly), an increase in the number of lung lymphatic vessels was measured (34% increase) by lung morphometry...
October 27, 2016: Angiogenesis
https://www.readbyqxmd.com/read/27782812/real-time-pcr-for-the-rapid-identification-and-drug-susceptibility-of-mycobacteria-present-in-bronchial-washings
#15
Thilini Piushani Keerthirathne, Dhammika Nayoma Magana-Arachchi, Dushantha Madegedara, Suneth Sithumini Sooriyapathirana
BACKGROUND: Mycobacteria have a spectrum of virulence and different susceptibilities to antibiotics. Distinguishing mycobacterial species is vital as patients with non-tuberculous mycobacterial (NTM) infections present clinical features that are similar to those of patients with tuberculosis. Thus, rapid differentiation of Mycobacterium tuberculosis complex from NTM is critical to administer appropriate treatment. Hence the aim of the study was to rapid identification of mycobacterial species present in bronchial washings using multiplex real time Polymerase Chain Reaction (PCR) and to determine the drug susceptibility in identified mycobacterial species...
October 26, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27764743/oroxylin-a-attenuates-cigarette-smoke-induced-lung-inflammation-by-activating-nrf2
#16
Jihe Li, Dongxia Tong, Juan Liu, Fuyang Chen, Yongbin Shen
Oroxylin A, a natural flavonoid isolated from the medicinal herb Scutellaria baicalensis Georgi, has been reported to have anti-inflammatory and antioxidant properties. However, the effect of oroxylin A on cigarette smoke (CS)-induced lung inflammation remains unclear. In this study, the ability of oroxylin A to protect against CS-induced lung inflammation was detected in vivo and in vitro. Oroxylin A was administered intraperitoneally to mice 2h prior CS exposure every day for five consecutive days. BEAS-2B bronchial epithelial cells and RAW264...
October 17, 2016: International Immunopharmacology
https://www.readbyqxmd.com/read/27763701/alternative-methods-of-lung-isolation-in-cases-of-pediatric-bilateral-thoracoscopic-surgery
#17
Mark Wigginton, Laura Lehrian
We compare airway management and lung isolation methods in two pediatric cases of congenital central hypoventilation syndrome undergoing bilateral throacoscopic phrenic-nerve-stimulator surgery. One child received lung isolation using a 7Fr bronchial blocker in conjunction with a 6.0 cuffed endotracheal tube; and the second received a technique of endobronchial intubation using a 3.5 microcuffed tube via the tracheostomy stoma in conjunction with 5.0 cuffed endotracheal intubation; a technique previously undescribed in pediatric patients...
December 2016: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/27753015/liquid-profiling-in-lung-cancer-quantification-of-extracellular-mirnas-in-bronchial-lavage
#18
Bernd Schmidt, Grit Rehbein, Michael Fleischhacker
Extracellular miRNAs cannot only be isolated from different body fluids like plasma and serum, but also from bronchial lavage samples (BL) obtained by bronchoscopy. Alterations in the expression of microRNAs might be useful for a discrimination of lung cancer patients from patients with a benign lung disease. We profiled extracellular microRNAs from three BL pools of lung cancer patients and three BL pools from a control group (patients with a benign lung disease) with TaqMan MicroRNA Array cards. For the confirmation of these results, we analyzed a panel of eight miRNAs in a qRT-PCR of the BL of 30 different lung cancer and non-cancerous patients...
2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27751243/repair-of-large-airway-defects-with-bioprosthetic-materials
#19
Brooks V Udelsman, Jessica Eaton, Ashok Muniappan, Christopher R Morse, Cameron D Wright, Douglas J Mathisen
OBJECTIVE: Patients with complicated airway defects that exceed the limits of primary repair represent a challenging clinical problem and require alternative techniques for repair. The aim of this study was to evaluate bioprosthetic reconstruction of large tracheal and bronchial defects. METHODS: Retrospective chart review of patients treated at a single tertiary center from 2008 to 2015 who underwent repair of tracheal or bronchial defects with a bioprosthetic device, namely aortic homograft or acellular dermal matrix...
November 2016: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/27749084/cross-species-transcriptome-profiling-identifies-new-alveolar-epithelial-type-i-cell-specific-genes
#20
Crystal N Marconett, Beiyun Zhou, Mitsuhiro Sunohara, Tiffany M Pouldar, HongJun Wang, Yixin Liu, Megan E Rieger, Evelyn Tran, Per Flodby, Kimberly D Siegmund, Edward D Crandall, Ite A Laird-Offringa, Zea Borok
Diseases involving the distal lung alveolar epithelium include chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF) and lung adenocarcinoma. Accurate labeling of specific cell types is critical for determining the contribution of each to pathogenesis of these diseases. The distal lung alveolar epithelium is comprised of two cell types, alveolar epithelial type 1 (AT1) and type 2 (AT2) cells. While cell type-specific markers, most prominently surfactant protein C (SFTPC), have allowed detailed lineage tracing studies of AT2 cell differentiation and their roles in disease, studies of AT1 cells have been hampered by lack of genes with expression unique to AT1 cells...
October 17, 2016: American Journal of Respiratory Cell and Molecular Biology
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