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https://www.readbyqxmd.com/read/28295275/pannexin-hemichannels-a-novel-promising-therapy-target-for-oxidative-stress-related-diseases
#1
REVIEW
Jin Xu, Linxi Chen, Lanfang Li
Pannexins, which contain three subtypes: pannexin-1, pannexin-2 and pannexin-3, are vertebrate glycoproteins that form non-junctional plasma membrane intracellular hemichannels via oligomerization. Oxidative stress refers to an imbalance of the generation and elimination of reactive oxygen species (ROS). Studies have shown that elevated ROS levels are pivotal in the development of a variety of diseases. Recent studies indicate that the occurrence of these oxidative stress related diseases is associated with pannexin hemichannels...
March 14, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28287506/assessment-of-pulmonary-capillary-blood-volume-membrane-diffusing-capacity-and-intrapulmonary-arteriovenous-anastomoses-during-exercise
#2
Vincent Tedjasaputra, Sean van Diepen, Sophie É Collins, Wade M Michaelchuk, Michael K Stickland
Exercise is a stress to the pulmonary vasculature. With incremental exercise, the pulmonary diffusing capacity (DLCO) must increase to meet the increased oxygen demand; otherwise, a diffusion limitation may occur. The increase in DLCO with exercise is due to increased capillary blood volume (Vc) and membrane diffusing capacity (Dm). Vc and Dm increase secondary to the recruitment and distension of pulmonary capillaries, increasing the surface area for gas exchange and decreasing pulmonary vascular resistance, thereby attenuating the increase in pulmonary arterial pressure...
February 20, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28280321/transdiaphragmatic-pressure-and-neural-respiratory-drive-measured-during-inspiratory-muscle-training-in-stable-patients-with-chronic-obstructive-pulmonary-disease
#3
Weiliang Wu, Xianming Zhang, Lin Lin, Yonger Ou, Xiaoying Li, Lili Guan, Bingpeng Guo, Luqian Zhou, Rongchang Chen
PURPOSE: Inspiratory muscle training (IMT) is a rehabilitation therapy for stable patients with COPD. However, its therapeutic effect remains undefined due to the unclear nature of diaphragmatic mobilization during IMT. Diaphragmatic mobilization, represented by transdiaphragmatic pressure (Pdi), and neural respiratory drive, expressed as the corrected root mean square (RMS) of the diaphragmatic electromyogram (EMGdi), both provide vital information to select the proper IMT device and loads in COPD, therefore contributing to the curative effect of IMT...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28271730/recent-mass-spectrometry-based-proteomics-for-biomarker-discovery-in-lung-cancer-copd-and-asthma
#4
Kiyonaga Fujii, Haruhiko Nakamura, Toshihide Nishimura
Lung cancer and related diseases have been one of the most common causes of deaths worldwide. Genomic-based biomarkers may hardly reflect the underlying dynamic molecular mechanism of functional protein interactions, which is the center of a disease. Recent developments in mass spectrometry (MS) have made it possible to analyze disease-relevant proteins expressed in clinical specimens by proteomic challenges. Areas covered: To understand the molecular mechanisms of lung cancer and its subtypes, chronic obstructive pulmonary disease (COPD), asthma and others, great efforts have been taken to identify numerous relevant proteins by MS-based clinical proteomic approaches...
March 17, 2017: Expert Review of Proteomics
https://www.readbyqxmd.com/read/28260934/peak-inspiratory-flow-rate-measurement-by-using-in-check-dial-for-the-different-inhaler-devices-in-elderly-with-obstructive-airway-diseases
#5
Theerasuk Kawamatawong, Supattra Khiawwan, Prapaporn Pornsuriyasak
BACKGROUND: Inhaler device technique is a common cause of treatment failure in patients with asthma and chronic obstructive pulmonary disease. Dry powder inhaler (DPI) requires optimal peak inspiratory flow rate (PIFR) for drug delivery. Low PIFR generation is common in the elderly. Patient lung function and intrinsic inhaler resistance are factors for determining generated PIFR and drug delivery from DPI. OBJECTIVES: We aimed to identify the PIFR of the older (aged >60 years) and the younger (aged ≤60 years) patients with obstructive airway diseases for the different inhaler devices (Turbuhaler(®) and Accuhaler)...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/28260872/reduced-nuclear-translocation-of-serum-response-factor-is-associated-with-skeletal-muscle-atrophy-in-a-cigarette-smoke-induced-mouse-model-of-copd
#6
Ran Ma, Xuefang Gong, Hua Jiang, Chunyi Lin, Yuqin Chen, Xiaoming Xu, Chenting Zhang, Jian Wang, Wenju Lu, Nanshan Zhong
Skeletal muscle atrophy and dysfunction are common complications in the chronic obstructive pulmonary disease (COPD). However, the underlying molecular mechanism remains elusive. Serum response factor (SRF) is a transcription factor which is critical in myocyte differentiation and growth. In this study, we established a mouse COPD model induced by cigarette smoking (CS) exposure for 24 weeks, with apparent pathophysiological changes, including increased airway resistance, enlarged alveoli, and skeletal muscle atrophy...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28258107/non-antibiotic-macrolides-restore-airway-macrophage-phagocytic-function-with-potential-anti-inflammatory-effects-in-chronic-lung-diseases
#7
Sandra J Hodge, Hai Tran, Rhys Hamon, Eugene Roscioli, Greg Hodge, Hubertus Jersmann, Miranda Ween, Paul N Reynolds, Arthur Yeung, Jennifer Treiberg, Sibylle Wilbert
We reported defective efferocytosis associated with cigarette smoking and/or airway inflammation in chronic lung diseases including COPD, severe asthma and childhood bronchiectasis. We also showed defects in phagocytosis of non-typeable H. influenzae (NTHi), a common colonizer of the lower airway in these diseases. These defects could be substantially overcome with low-dose Azithromycin; however, chronic usage may induce bacterial resistance. We investigated two novel macrolides, GS-459755 (2'-desoxy-9-(S)-erythromycylamine) and GS-560660 (Azithromycin-based 2'-desoxy molecule) with significantly diminished antibiotic activity against S...
March 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28254994/draft-genome-sequence-of-bacillus-obstructivus-vt-16-70-isolated-from-the-bronchoalveolar-lavage-fluid-of-a-patient-with-chronic-obstructive-pulmonary-disease
#8
Victor Tetz, George Tetz
We report here the draft genome sequence of Bacillus obstructivus VT-16-70, a novel spore-forming bacterium isolated from the lungs of a patient with chronic obstructive pulmonary disease. The genome comprised 5,220,753 bp, with 35.2% G+C content. There were 4,972 predicted protein-coding genes, including those associated with antibiotic resistance and virulence.
March 2, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28252317/role-for-nlrp3-inflammasome-mediated-il-1%C3%AE-dependent-responses-in-severe-steroid-resistant-asthma
#9
Richard Y Kim, James W Pinkerton, Ama T Essilfie, Avril Ab Robertson, Katherine J Baines, Alexandra C Brown, Jemma R Mayall, Md Khadem Ali, Malcolm R Starkey, Nicole G Hansbro, Jeremy A Hirota, Lisa G Wood, Jodie L Simpson, Darryl A Knight, Peter A Wark, Peter G Gibson, Luke A J O'Neill, Matthew A Cooper, Jay C Horvat, Philip M Hansbro
RATIONALE: Severe, steroid-resistant asthma is the major unmet need in asthma therapy. Disease heterogeneity and poor understanding of pathogenic mechanisms hampers the identification of therapeutic targets. Excessive NLRP3 inflammasome and concomitant IL-1β responses occur in COPD, respiratory infections and neutrophilic asthma. However, the direct contributions to pathogenesis, mechanisms involved and potential for therapeutic targeting remain poorly understood, and are unknown in severe, steroid-resistant asthma...
March 2, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28248572/transcriptomic-analysis-of-lung-tissue-from-cigarette-smoke-induced-emphysema-murine-models-and-human-copd-show-shared-and-distinct-pathways
#10
Jeong H Yun, Jarrett Morrow, Caroline A Owen, Weiliang Qiu, Kimberly Glass, Taotao Lao, Zhiqiang Jiang, Mark Perrella, Edwin K Silverman, Xiaobo Zhou, Craig P Hersh
Although cigarette smoke (CS) is the primary risk factor for chronic obstructive pulmonary disease (COPD), the underlying molecular mechanisms for the significant variability in developing COPD in response to CS are incompletely understood. We performed lung gene expression profiling of two different wild-type murine strains (C57BL/6, NZW/LacJ) and two genetic models with mutations in COPD genome-wide association study (GWAS) genes (HHIP, FAM13A) after six months of chronic CS exposure and compared the results to human COPD lung tissues...
March 1, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28238903/responsiveness-to-bronchodilator-procaterol-in-copd-as-assessed-by-forced-oscillation-technique
#11
Satoru Ito, Akemi Uchida, Yoshitaka Isobe, Yoshinori Hasegawa
The aim of this retrospective study was to assess responses to a bronchodilator by forced oscillation technique (FOT) and to relate the results of respiratory impedance (Zrs) to spirometric parameters in patients with chronic obstructive pulmonary disease (COPD). Zrs was measured as a function of frequency from 4 to 36Hz before and after inhalation of procaterol, a short-acting β2-agonist (n=60). Respiratory resistance (Rrs) and reactance (Xrs) were significantly frequency-dependent, and inspiratory and expiratory phases were different both before and after procaterol inhalation...
February 24, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28236608/normal-weight-but-low-muscle-mass-and-abdominally-obese-implications-for-the-cardiometabolic-risk-profile-in-chronic-obstructive-pulmonary-disease
#12
Rosanne J H C G Beijers, Coby van de Bool, Bram van den Borst, Frits M E Franssen, Emiel F M Wouters, Annemie M W J Schols
BACKGROUND: It is well established that low muscle mass affects physical performance in chronic obstructive pulmonary disease (COPD). We hypothesize that combined low muscle mass and abdominal obesity may also adversely influence the cardiometabolic risk profile in COPD, even in those with normal weight. The cardiometabolic risk profile and the responsiveness to 4 months high-intensity exercise training was assessed in normal-weight patients with COPD with low muscle mass stratified by abdominal obesity...
February 21, 2017: Journal of the American Medical Directors Association
https://www.readbyqxmd.com/read/28223791/impact-of-exacerbations-on-respiratory-system-impedance-measured-by-a-forced-oscillation-technique-in-copd-a-prospective-observational-study
#13
Takahiro Kamada, Masahiro Kaneko, Hiromi Tomioka
BACKGROUND: Forced oscillation technique (FOT) has been reported to be useful in the evaluation and management of obstructive lung disease, including COPD. To date, no data are available concerning long-term changes in respiratory system impedance measured by FOT. Additionally, although exacerbations have been reported to be associated with excessive lung function decline in COPD, the impact of exacerbations on the results of FOT has not been demonstrated. The aim of this study was to investigate the longitudinal changes in respiratory system impedance and the influence of exacerbations thereon...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28223227/mitogen-activated-protein-kinases-as-therapeutic-targets-for-asthma
#14
REVIEW
MirHojjat Khorasanizadeh, Mahsa Eskian, Erwin W Gelfand, Nima Rezaei
Corticosteroid-resistant asthmatics, although comprising only a portion of the asthma population, account for most of the morbidity, mortality and economic burden associated with asthma. Moreover, corticosteroids are not effective inhibitors of airway remodeling changes, and their long-term use is associated with debilitating systemic side effects. Therefore, potent and safe novel therapeutic alternatives, targeting basic pathophysiological mechanisms responsible for the severe asthmatic phenotype are urgently needed...
February 14, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28209038/-a-comparison-of-leak-compensation-in-six-acute-care-ventilators-during-non-invasive-ventilation
#15
X S Hu, Y Wang, Z T Wang, P Yan, X G Zhang, S F Zhao, F Xie, H J Gu, L X Xie
Objective: To compare the ability of leak compensation in 6 medical ventilators during non-invasive ventilation. Methods: Six medical ventilators were selected, including 3 non-invasive ventilators (V60, Flexo and Stellar150), and 3 invasive ventilators(Avea, Servo I and BellaVist). Using a lung simulator, the ability of leak compensation was evaluated during triggering and cycling in 2 respiratory mechanics conditions (high airway resistance condition and high elastance resistance condition), and each condition was performed under 2 PEEP levels (4, and 8 cmH(2)O, 1 mmHg=0...
February 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28203096/burden-of-methicillin-resistant-staphylococcus-aureus-pneumonia-among-hospitalized-patients-in-lebanon-and-saudi-arabia
#16
Abdulhakeem O Althaqafi, Madonna J Matar, Rima Moghnieh, Adel F Alothman, Thamer H Alenazi, Fayssal Farahat, Shelby Corman, Caitlyn T Solem, Nirvana Raghubir, Cynthia Macahilig, Seema Haider, Jennifer M Stephens
OBJECTIVES: The objective of this study is to describe the real-world treatment patterns and burden of suspected or confirmed methicillin-resistant Staphylococcus aureus (MRSA) pneumonia in Saudi Arabia and Lebanon. METHODS: A retrospective chart review study evaluated 2011-2012 data from hospitals in Saudi Arabia and Lebanon. Patients were included if they had been discharged with a diagnosis of MRSA pneumonia, which was culture proven or suspected based on clinical criteria...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28202552/airway-dynamics-in-copd-patients-by-within-breath-impedance-tracking-effects-of-continuous-positive-airway-pressure
#17
András Lorx, Dorottya Czövek, Zoltán Gingl, Gergely Makan, Bence Radics, Dóra Bartusek, Szabolcs Szigeti, János Gál, György Losonczy, Peter D Sly, Zoltán Hantos
Tracking of the within-breath changes of respiratory mechanics using the forced oscillation technique may provide outcomes that characterise the dynamic behaviour of the airways during normal breathing.We measured respiratory resistance (Rrs) and reactance (Xrs) at 8 Hz in 55 chronic obstructive pulmonary disease (COPD) patients and 20 healthy controls, and evaluated Rrs and Xrs as functions of gas flow (V') and volume (V) during normal breathing cycles. In 12 COPD patients, additional measurements were made at continuous positive airway pressure (CPAP) levels of 4, 8, 14 and 20 hPa...
February 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28199135/extreme-trait-whole-genome-sequencing-identifies-ptpro-as-a-novel-candidate-gene-in-emphysema-with-severe-airflow-obstruction
#18
Josiah E Radder, Yingze Zhang, Alyssa D Gregory, Shibing Yu, Neil J Kelly, Joseph K Leader, Naftali Kaminski, Frank C Sciurba, Steven D Shapiro
RATIONALE: Genetic association studies in chronic obstructive pulmonary disease (COPD) have primarily tested for association with common variants, the results of which explain only a portion of disease heritability. As rare variation is also likely to contribute to susceptibility, we employed whole genome sequencing (WGS) of subjects with clinically extreme phenotypes to identify genomic regions enriched for rare variation contributing to COPD susceptibility. OBJECTIVE: Identify regions of rare genetic variation contributing to emphysema with severe airflow obstruction Methods: We identified heavy smokers that were resistant (n=65) or susceptible (n=64) to emphysema with severe airflow obstruction in the Pittsburgh SCCOR cohort...
February 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28197800/small-airway-obstruction-in-chronic-obstructive-pulmonary-disease-potential-parameters-for-early-detection
#19
Tomasz Piorunek, Magdalena Kostrzewska, Marta Stelmach-Mardas, Marcin Mardas, Sławomir Michalak, Joanna Goździk-Spychalska, Halina Batura-Gabryel
The impulse oscillometry (IOS) is recognized as a complementary method to spirometry in the diagnostics of obstructive pulmonary disorders. The IOS enables to measure total respiratory resistance (R5) and proximal respiratory resistance (R20), with the R5-R20 difference reflecting small airway resistance. This study seeks to evaluate the usefulness of R5-R20, maximal mid-expiratory flow (MMEF), and forced expiratory volume in 3 s/forced vital capacity ratio (FEV3/FVC), in the assessment of small airway obstruction in chronic obstructive pulmonary disease (COPD)...
February 15, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28187782/sputum-dna-sequencing-in-cystic-fibrosis-non-invasive-access-to-the-lung-microbiome-and-to-pathogen-details
#20
Rounak Feigelman, Christian R Kahlert, Florent Baty, Frank Rassouli, Rebekka L Kleiner, Philipp Kohler, Martin H Brutsche, Christian von Mering
BACKGROUND: Cystic fibrosis (CF) is a life-threatening genetic disorder, characterized by chronic microbial lung infections due to abnormally viscous mucus secretions within airways. The clinical management of CF typically involves regular respiratory-tract cultures in order to identify pathogens and to guide treatment. However, culture-based methods can miss atypical or slow-growing microbes. Furthermore, the isolated microbes are often not classified at the strain level due to limited taxonomic resolution...
February 10, 2017: Microbiome
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