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Copd challenge model

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https://www.readbyqxmd.com/read/29368450/frequency-dependent-airway-hyperresponsiveness-in-a-mouse-model-of-emphysema-and-allergic-inflammation
#1
Kentaro Tamura, Koichiro Matsumoto, Satoru Fukuyama, Keiko Kan-O, Yumiko Ishii, Ken Tonai, Miyoko Tatsuta, Aimi Enokizu, Hiromasa Inoue, Yoichi Nakanishi
Asthma and chronic obstructive pulmonary disease (COPD), chronic airway inflammatory diseases characterized by airflow limitation, have different etiologies and pathophysiologies. Asthma-COPD Overlap (ACO) has recently been used for patients with mixed asthma and COPD. The pathophysiological mechanisms of ACO have not been clearly understood due to the lack of an appropriate murine model. To investigate its pathophysiology, we examined a murine model by allergen challenge in surfactant protein-D (SP-D)-deficient mice that spontaneously developed pulmonary emphysema...
January 2018: Physiological Reports
https://www.readbyqxmd.com/read/29331655/what-makes-it-so-difficult-for-nurses-to-coach-patients-in-shared-decision-making-a-process-evaluation
#2
Stephanie Anna Lenzen, Ramon Daniëls, Marloes Amantia van Bokhoven, Trudy van der Weijden, Anna Beurskens
BACKGROUND: Primary care nurses play a crucial role in coaching patients in shared decision making about goals and actions. This presents a challenge to practice nurses, who are frequently used to protocol-based working routines. Therefore, an approach was developed to support nurses to coach patients in shared decision making. OBJECTIVES: To investigate how the approach was implemented and experienced by practice nurses and patients. DESIGN: A process evaluation was conducted using quantitative and qualitative methods...
December 16, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/29314863/bacterial-derived-neutrophilic-inflammation-drives-lung-remodeling-in-a-mouse-model-of-copd
#3
Bradley W Richmond, Rui-Hong Du, Wei Han, John T Benjamin, Riet van der Meer, Linda Gleaves, Marshall Guo, Austin McKissack, Yongqin Zhang, Dong-Sheng Cheng, Vasiliy V Polosukhin, Timothy S Blackwell
Loss of secretory immunoglobulin A (SIgA) is common in the small airways of patients with chronic obstructive pulmonary disease (COPD) and may contribute to disease pathogenesis. Using mice that lack SIgA in the airways due to genetic deficiency of polymeric immunoglobulin receptor (pIgR-/- mice), we investigated the role of neutrophils in driving the fibrotic small airway wall remodeling and emphysema that develops spontaneously in these mice. By flow cytometry, we found an increase in the percentage of neutrophils among CD45+ cells in the lungs, as well as an increase in total neutrophils, in pIgR-/- mice compared to wild-type (WT) controls...
January 9, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29297179/vascular-endothelial-growth-factor-receptor-inhibition-enhances-copd-picture-in-mice-exposed-to-waterpipe-smoke
#4
Abdallah Alzoubi, Rawan Ghazwi, Karem Alzoubi, Mohammad Alqudah, Khalid Kheirallah, Omar Khabour, Mohammed Allouh
BACKGROUND: Chronic obstructive pulmonary disease (COPD) is marked by destruction of alveolar architecture. Preclinical modeling for COPD is challenging. Chronic cigarette smoke exposure, the reference animal model of COPD, is time-inefficient, while exposure to waterpipe smoke (WPS), a surging smoking modality, was not fully tested for its histopathological pulmonary consequences. Since alveolar damage and pulmonary vascular endothelial dysfunction are integral to COPD pathology, lung histopathological effects of WPS were temporally evaluated, alone or in combination with vascular endothelial growth factor receptor (VEGFR) inhibition in mice...
January 3, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29203544/mapping-protective-regions-on-a-three-dimensional-model-of-the-moraxella-catarrhalis-vaccine-antigen-oligopeptide-permease-a
#5
Antonia C Perez, Antoinette Johnson, Ziqiang Chen, Gregory E Wilding, Michael G Malkowski, Timothy F Murphy
A vaccine against Moraxella catarrhalis will reduce tremendous morbidity, mortality, and financial burden by preventing otitis media in children and exacerbations of COPD in adults. Oligopeptide permease A (OppA) is a candidate vaccine antigen that is 1) a nutritional virulence factor expressed on the bacterial cell surface during infection, 2) widely conserved among strains, 3) highly immunogenic, and 4) a protective antigen based on its capacity to induce protective responses in immunized animals. In the present study, we show that the antibodies to OppA following vaccination mediate accelerated clearance in animals following pulmonary challenge...
December 4, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29081837/new-ways-of-working-delivering-better-care-for-people-with-long-term-conditions
#6
Victoria Tzortziou Brown, Irem Patel, Nicola Thomas, James Tomlinson, Rachel Roberts, Hugh Rayner, Neil Ashman, Sally Hull
BACKGROUND: The cost-effectiveness of the traditional outpatient model for specialist care provision is increasingly being questioned in view of the changing patient needs, workforce challenges and technological advances. SETTING: This report summarises two RCGP London events showcasing new ways of delivering care for long-term conditions. QUESTIONS: What are the alternative approaches to the traditional outpatient model and do they have common themes? What are the challenges and opportunities of these new models of care? METHODS: Presentation of examples of new ways of long-term condition care delivery and round-table facilitative discussion and reflection on the challenges and solutions around service re-design and implementation, the commissioning and funding of new models of care, the facilitation of system-wide learning and the collection of data for evaluation...
September 2017: London Journal of Primary Care
https://www.readbyqxmd.com/read/28980785/-doctor-i-m-afraid-of-suffocating-copd-and-psychiatric-manifestations
#7
Stéphane Henninger, Doris Calamand, Olivier Pasche, Giorgio E Maccaferri
The chronic obstructive pulmonary disease is a frequent and increasing disease in Western countries. Psychiatric comorbidities, such as depression or anxiety, are often observed and have a major impact on the quality of life and on the prognosis of the patients. Several models based on physiopathological and behavioral psychotherapy researches help us to understand this association between somatic and psychiatric disease. The detection and the treatment of these comorbidities are challenges for the practitioner and make a multidisciplinary approach recommended...
October 4, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28976240/hsp60-activity-on-human-bronchial-epithelial-cells
#8
Claudia Sangiorgi, Davide Vallese, Isabella Gnemmi, Fabio Bucchieri, Bruno Balbi, Paola Brun, Angelo Leone, Andrea Giordano, Everly Conway de Macario, Alberto Jl Macario, Francesco Cappello, Antonino Di Stefano
HSP60 has been implicated in chronic inflammatory disease pathogenesis, including chronic obstructive pulmonary disease (COPD), but the mechanisms by which this chaperonin would act are poorly understood. A number of studies suggest a role for extracellular HSP60, since it can be secreted from cells and bind Toll-like receptors; however, the effects of this stimulation have never been extensively studied. We investigated the effects (pro- or anti-inflammatory) of HSP60 in human bronchial epithelial cells (16-HBE) alone and in comparison with oxidative, inflammatory, or bacterial challenges...
October 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/28960804/angiotensin-1-7-mediated-mas1-receptor-nf-%C3%AE%C2%BAb-p65-signaling-is-involved-in-a-cigarette-smoke-induced-chronic-obstructive-pulmonary-disease-mouse-model
#9
Yong Zhang, Yang Li, Ce Shi, Xiaomin Fu, Lingdi Zhao, Yongping Song
Angiotensin-(1-7) [Ang-(1-7)] has been shown to play a significant role in the pathogenesis of lung inflammation via Mas receptor; however, its effect in chronic obstructive pulmonary disease (COPD) remains unknown. To explore the effect of Ang-(1-7) on a cigarette smoke (CS) exposure-induced COPD model, 40 C57BL/6J mice were divided into four groups (n = 10) and exposed to air or CS for 8 weeks. After that, they were treated with saline or Ang-(1-7) at 0.3 mg/kg for 2 weeks by subcutaneous infusion using osmotic pump...
January 2018: Environmental Toxicology
https://www.readbyqxmd.com/read/28895883/the-effects-of-resveratrol-on-inflammation-and-oxidative-stress-in-a-rat-model-of-chronic-obstructive-pulmonary-disease
#10
Xiao-Li Wang, Ting Li, Ji-Hong Li, Shu-Ying Miao, Xian-Zhong Xiao
Oxidative stress and inflammation are hypothesized to contribute to the pathogenesis of chronic obstructive pulmonary disease (COPD). Resveratrol (trans-3,5,4'-trihydroxystilbene) is known for its antioxidant and anti-inflammatory properties. The study aimed to investigate the effects of resveratrol in a rat model with COPD on the regulation of oxidative stress and inflammation via the activation of Sirtuin1 (SIRTl) and proliferator-activated receptor-γ coactivator-1α (PGC-1α). Thirty Wistar rats were randomly divided into three groups: control group, COPD group and resveratrol intervention group...
September 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28868892/home-based-pulmonary-rehabilitation-for-people-with-copd-a-qualitative-study-reporting-the-patient-perspective
#11
Aroub Lahham, Christine F McDonald, Ajay Mahal, Annemarie L Lee, Catherine J Hill, Angela T Burge, Narelle S Cox, Rosemary Moore, Caroline Nicolson, Paul O'Halloran, Rebecca Gillies, Anne E Holland
This study aimed to document the perspective of patients with chronic obstructive pulmonary disease (COPD) who underwent home-based pulmonary rehabilitation (HBPR) in a clinical trial. In this qualitative study, open-ended questions explored participants' views regarding HBPR. Thirteen semi-structured interviews were analysed using a thematic analysis approach. Major themes from interviews included the positive impact of HBPR on physical fitness, breathing and mood. Participants valued the flexibility and convenience of the programme...
January 1, 2017: Chronic Respiratory Disease
https://www.readbyqxmd.com/read/28853985/a-moraxella-catarrhalis-vaccine-to-protect-against-otitis-media-and-exacerbations-of-copd-an-update-on-current-progress-and-challenges
#12
Antonia C Perez, Timothy F Murphy
Moraxella catarrhalis is a major cause of morbidity and mortality worldwide, especially causing otitis media in young children and exacerbations of chronic obstructive pulmonary disease in adults. This pathogen uses several virulence mechanisms to colonize and survive in its host, including adherence and invasion of host cells, formation of polymicrobial biofilms with other bacterial pathogens, and production of β-lactamase. Given the global impact of otitis media and COPD, an effective vaccine to prevent M...
October 3, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28814852/prognostic-variables-and-scores-identifying-the-end-of-life-in-copd-a-systematic-review
#13
REVIEW
Laura-Jane E Smith, Elizabeth Moore, Ifrah Ali, Liam Smeeth, Patrick Stone, Jennifer K Quint
INTRODUCTION: COPD is a major cause of mortality, and the unpredictable trajectory of the disease can bring challenges to end-of-life care. We aimed to investigate known prognostic variables and scores that predict prognosis in COPD in a systematic literature review, specifically including variables that contribute to risk assessment of patients for death within 12 months. METHODS: We conducted a systematic review on prognostic variables, multivariate score or models for COPD...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28798199/human-cerebral-blood-flow-control-during-hypoxia-focus-on-chronic-pulmonary-obstructive-disease-and-obstructive-sleep-apnea
#14
REVIEW
Andrew E Beaudin, Sara E Hartmann, Matiram Pun, Marc J Poulin
The brain is a vital organ that relies on a constant and adequate blood flow to match oxygen and glucose delivery with the local metabolic demands of active neurons. Thus exquisite regulation of cerebral blood flow (CBF) is particularly important under hypoxic conditions to prevent a detrimental decrease in the partial pressure of oxygen within the brain tissues. Cerebrovascular sensitivity to hypoxia, assessed as the change in CBF during a hypoxic challenge, represents the capacity of cerebral vessels to respond to, and compensate for, a reduced oxygen supply, and has been shown to be impaired or blunted in a number of conditions...
November 1, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28676846/inactivation-of-the-thymidylate-synthase-thya-in-non-typeable-haemophilus-influenzae-modulates-antibiotic-resistance-and-has-a-strong-impact-on-its-interplay-with-the-host-airways
#15
Irene Rodríguez-Arce, Sara Martí, Begoña Euba, Ariadna Fernández-Calvet, Javier Moleres, Nahikari López-López, Montserrat Barberán, José Ramos-Vivas, Fe Tubau, Carmen Losa, Carmen Ardanuy, José Leiva, José E Yuste, Junkal Garmendia
Antibacterial treatment with cotrimoxazol (TxS), a combination of trimethoprim and sulfamethoxazole, generates resistance by, among others, acquisition of thymidine auxotrophy associated with mutations in the thymidylate synthase gene thyA, which can modify the biology of infection. The opportunistic pathogen non-typeable Haemophilus influenzae (NTHi) is frequently encountered in the lower airways of chronic obstructive pulmonary disease (COPD) patients, and associated with acute exacerbation of COPD symptoms...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28659326/a-cation-binding-surface-protein-as-a-vaccine-antigen-to-prevent-moraxella-catarrhalis-otitis-media-and-infections-in-chronic-obstructive-pulmonary-disease
#16
Timothy F Murphy, Aimee L Brauer, Antoinette Johnson, Gregory E Wilding, Mary Koszelak-Rosenblum, Michael G Malkowski
Moraxella catarrhalis is an exclusively human respiratory tract pathogen that is a common cause of otitis media in children and respiratory tract infections in adults with chronic obstructive pulmonary disease. A vaccine to prevent these infections would have a major impact in reducing the substantial global morbidity and mortality in these populations. Through a genome mining approach, we identified AfeA, an ∼32 kDa substrate binding protein of an ABC transport system as an excellent candidate vaccine antigen...
June 28, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28657170/the-past-decade-in-bench-research-into-pulmonary-infectious-diseases-what-do-clinicians-need-to-know
#17
REVIEW
Simon Finch, Holly R Keir, Alison J Dicker, James D Chalmers
Respiratory infections are primarily treated with antibiotics, drugs that are mostly inexpensive and have been widely available since the 1940s and 1950s. Nevertheless, despite antibiotics, the burden of disease in pneumonia, bronchiectasis, cystic fibrosis, COPD and rare respiratory infections remains exceptionally high. There is an urgent need for translational studies to develop new treatments or new biomarkers to improve outcomes in these conditions. The 'translational gaps' between bench science and clinical practice are particularly challenging in respiratory infections...
June 28, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28644419/context-relevant-prediction-model-for-copd-domain-using-bayesian-belief-network
#18
Hamid Mcheick, Lokman Saleh, Hicham Ajami, Hafedh Mili
In the last three decades, researchers have examined extensively how context-aware systems can assist people, specifically those suffering from incurable diseases, to help them cope with their medical illness. Over the years, a huge number of studies on Chronic Obstructive Pulmonary Disease (COPD) have been published. However, how to derive relevant attributes and early detection of COPD exacerbations remains a challenge. In this research work, we will use an efficient algorithm to select relevant attributes where there is no proper approach in this domain...
June 23, 2017: Sensors
https://www.readbyqxmd.com/read/28557543/impaired-mitochondrial-microbicidal-responses-in-chronic-obstructive-pulmonary-disease-macrophages
#19
Martin A Bewley, Julie A Preston, Mohammed Mohasin, Helen M Marriott, Richard C Budd, Julie Swales, Paul Collini, David R Greaves, Ruth W Craig, Christopher E Brightling, Louise E Donnelly, Peter J Barnes, Dave Singh, Steven D Shapiro, Moira K B Whyte, David H Dockrell
RATIONALE: Chronic obstructive pulmonary disease (COPD) is characterized by impaired clearance of pulmonary bacteria. OBJECTIVES: The effect of COPD on alveolar macrophage (AM) microbicidal responses was investigated. METHODS: AMs were obtained from bronchoalveolar lavage from healthy donors or patients with COPD and challenged with opsonized serotype 14 Streptococcus pneumoniae. Cells were assessed for apoptosis, bactericidal activity, and mitochondrial reactive oxygen species (mROS) production...
October 1, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28511344/anti-inflammatory-effects-of-trans-anethole-in-a-mouse-model-of-chronic-obstructive-pulmonary-disease
#20
Ka Young Kim, Hui Su Lee, Geun Hee Seol
Chronic obstructive pulmonary disease (COPD) is a chronic inflammatory lung disease that is generally characterized by progressive and irreversible airflow obstruction and alveolar destruction. Long-term treatment with current medications has been associated with various adverse effects, indicating a need for alternative approaches for the prevention and treatment of COPD. This study investigated the mechanism underlying the effects of trans-anethole in a mouse model of COPD induced by porcine pancreatic elastase (PPE) and lipopolysaccharide (LPS)...
July 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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