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Emphysema

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https://www.readbyqxmd.com/read/28534139/pulmonary-emphysema-cross-linking-with-pulmonary-fibrosis-and-vice-versa-a-non-usual-experimental-intervention-with-elastase-and-bleomycin
#1
Isabella Cattani-Cavalieri, Adriane Graça Reis, Emanuel Kennedy-Feitosa, Vanessa Pinho-Ribeiro, Manuella Lanzetti, Lycia Brito Gitirana, Bruna Romana-Souza, Luis Cristóvão Porto, Samuel Santos Valença
Elastase (PPE) is usually used for emphysema models, whereas bleomycin (BLM) is used for fibrosis models. The aim of this study was to investigate the effect of BLM in PPE-induced emphysema, as well as the effect of PPE in BLM-induced fibrosis. C57BL/6 mice were divided into five groups: control, PPE, BLM, PPE + BLM, and BLM + PPE. Mice received saline, PPE (3 U/mouse), or BLM (20 U/kg) by intranasal instillation. Mice from the BLM and BLM + PPE groups received BLM on day 0 and saline or PPE on day 21, respectively...
May 23, 2017: Inflammation
https://www.readbyqxmd.com/read/28533915/mechanisms-of-ecg-signs-in-chronic-obstructive-pulmonary-disease
#2
Marte Strømsnes Larssen, Kjetil Steine, Janne Mykland Hilde, Ingunn Skjørten, Christian Hodnesdal, Knut Liestøl, Knut Gjesdal
OBJECTIVE: Patients with chronic obstructive pulmonary disease (COPD) often have abnormal ECGs. Our aim was to separate the effects on ECG by airway obstruction, emphysema and right ventricular (RV) afterload in patients with COPD. METHODS: A cross-sectional study was performed on 101 patients with COPD without left heart disease and 32 healthy age-matched controls. Body mass index (BMI) was measured, and pulmonary function tests, ECG, echocardiography and right heart catheterisation (only patients) were performed...
2017: Open Heart
https://www.readbyqxmd.com/read/28533875/-management-of-spontaneous-pneumothorax-about-138-cases
#3
Bouchra Habibi, Leila Achachi, Sohaib Hayoun, Mohammed Raoufi, Laila Herrak, Mustapha El Ftouh
Pneumothorax is a collection of air in the pleural cavity. We conducted a retrospective study of patients with spontaneous pneumothorax in the Department of Pneumology at the Ibn Sina Hospital in Rabat (2009-2011) with the aim to determine the epidemiological, clinical, radiological, therapeutic and evolutionary manifestation of spontaneous pneumothorax. The study involved 138 patients: 128 men and 10 women (17-83 years), with an average age of 44.5 +/- 17.4 years and sex ratio of 12/8. 81.2% of patients were smokers...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28533733/tobacco-smoke-exposure-reduces-paraoxonase-activity-in-a-murine-model
#4
Robert M Reed, Saif M Borgan, Michael Eberlein, Monica Goldklang, Joshua Lewis, Michael Miller, Mohamad Navab, Bo S Kim
AIM: To demonstrate a direct inhibitory effect of cigarette smoke exposure on paraoxonase 1 activity in a murine in vivo model. METHODS: At 8 weeks old, we randomized 10 C57/bl6 mice to an environment consisting of either filtered air or cigarette smoke for 6 months. Smoke exposure (7 hours per day, 5 days per week) was standardized using a model TE-10 smoking machine and adjusted to maintain constant sidestream and mainstream smoke. After 6 months of exposure, we assessed differences in lung air space, cholesterol, lipid, and lipoprotein profiles, as well as paraoxonase activity in mice exposed to cigarette smoke extract compared to unexposed control mice...
March 2017: International Journal of Biomedical Science: IJBS
https://www.readbyqxmd.com/read/28530121/glucocorticoids-retain-bi-potent-fibroblast-progenitors-during-alveolar-septation-in-mice
#5
Stephen E McGowan, Diann M McCoy
Glucocorticoids have been widely used and exert pleiotropic effects on alveolar structure and function, but do not improve the long-term clinical outcomes for patients with bronchopulmonary dysplasia, emphysema, or interstitial lung diseases. Treatments which foster alveolar regeneration could substantially improve the long-term outcomes for such patients. One approach to alveolar regeneration is to stimulate and guide intrinsic alveolar progenitors along developmental pathways used during secondary septation...
May 21, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28523200/an-unusual-presentation-of-congenital-lobar-emphysema
#6
Daniel Arnaud, Joseph Varon, Salim Surani
Congenital lobar emphysema is an uncommon bronchopulmonary malformation characterized by lobar overinflation and accompanying alveolar septum damage that leads to compression atelectasis of the lung parenchyma and displacement of mediastinal structures, with the resultant ventilation-perfusion mismatch. We present a case of a 33-year-old lady with progressive exertional dyspnea. Chest radiograph findings lead to the suspicion of congenital lobar emphysema, which was then confirmed by a computed tomography (CT) scan...
2017: Case Reports in Pulmonology
https://www.readbyqxmd.com/read/28523153/pleural-pressure-theory-revisited-a-role-for-capillary-equilibrium
#7
Aaron R Casha, Roberto Caruana-Gauci, Alexander Manche, Marilyn Gauci, Stanley Chetcuti, Luca Bertolaccini, Marco Scarci
BACKGROUND: Theories elucidating pleural pressures should explain all observations including the equal and opposite recoil of the chest wall and lungs, the less than expected pleural hydrostatic gradient and its variation at lobar margins, why pleural pressures are negative and how pleural fluid circulation functions. METHODS: A theoretical model describing equilibrium between buoyancy, hydrostatic forces, and capillary forces is proposed. The capillary equilibrium model described depends on control of pleural fluid volume and protein content, powered by an active pleural pump...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28515969/application-of-selective-bronchial-intubation-versus-neurally-adjusted-ventilatory-assist-in-the-management-of-unilateral-pulmonary-interstitial-emphysema-an-illustrative-case-and-the-literature-review
#8
Shing-Yan Robert Lee
In the treatment of left-sided pulmonary interstitial emphysema (PIE) in a 23-week neonate, we used two ventilatory strategies: selective bronchial intubation from day 10 to 15 and neurally adjusted ventilatory assist (NAVA) from day 18 to 26. We compared the effects and adverse effects of these two strategies. On selective bronchial intubation, desaturation was frequent. Fentanyl infusion was required. There was an episode of carbon dioxide retention coupled with hypotension. On NAVA, the neonate was clinically stable without the requirement of sedation...
April 2017: American Journal of Perinatology Reports
https://www.readbyqxmd.com/read/28512995/alpha-1-antitrypsin-deficiency-related-panniculitis-two-cases-with-diverse-clinical-courses
#9
E R Storan, S M O' Gorman, P Hawkins, L Aalto, A Murphy, T Markham
Alpha-1-antitrypsin deficiency (AATD)-related panniculitis is an extremely rare and underdiagnosed entity, and there is a paucity of data on its treatment. We report two cases of AATD-related panniculitis. The first was a 24-year-old woman with known AATD who presented with painful leg ulcers refractory to treatment with corticosteroids and colchicine. She had a good response to α1-antitrypsin infusions but required dose adjustment due to flares in disease activity. The second case was a 38-year-old woman who presented with painful nodules on the legs refractory to corticosteroid therapy...
May 17, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28510483/improvement-in-ventilation-perfusion-mismatch-after-bronchoscopic-lung-volume-reduction-quantitative-image-analysis
#10
Sei Won Lee, Sang Min Lee, So Youn Shin, Tai Sun Park, Sang Young Oh, Namkug Kim, Yoonki Hong, Jae Seung Lee, Yeon-Mok Oh, Sang-Do Lee, Joon Beom Seo
Purpose To evaluate whether bronchoscopic lung volume reduction (BLVR) increases ventilation and therefore improves ventilation-perfusion (V/Q) mismatch. Materials and Methods All patients provided written informed consent to be included in this study, which was approved by the Institutional Review Board (2013-0368) of Asan Medical Center. The physiologic changes that occurred after BLVR were measured by using xenon-enhanced ventilation and iodine-enhanced perfusion dual-energy computed tomography (CT). Patients with severe emphysema plus hyperinflation who did not respond to usual treatments were eligible...
May 16, 2017: Radiology
https://www.readbyqxmd.com/read/28507288/identifying-individuals-with-physician-diagnosed-chronic-obstructive-pulmonary-disease-in-primary-care-electronic-medical-records-a-retrospective-chart-abstraction-study
#11
Theresa M Lee, Karen Tu, Laura L Wing, Andrea S Gershon
Little is known about using electronic medical records to identify patients with chronic obstructive pulmonary disease to improve quality of care. Our objective was to develop electronic medical record algorithms that can accurately identify patients with obstructive pulmonary disease. A retrospective chart abstraction study was conducted on data from the Electronic Medical Record Administrative data Linked Database (EMRALD(®)) housed at the Institute for Clinical Evaluative Sciences. Abstracted charts provided the reference standard based on available physician-diagnoses, chronic obstructive pulmonary disease-specific medications, smoking history and pulmonary function testing...
May 15, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28506611/clinical-and-genetic-associations-of-objectively-identified-interstitial-changes-in-smokers
#12
Samuel Y Ash, Rola Harmouche, Rachel K Putman, James C Ross, Alejandro A Diaz, Gary M Hunninghake, Jorge Onieva Onieva, Fernando J Martinez, Augustine M Choi, David A Lynch, Hiroto Hatabu, Ivan O Rosas, Raul San Jose Estepar, George R Washko
BACKGROUND: Smoking related lung injury may manifest on computed tomography (CT) as both emphysema and interstitial changes. We have developed an automated method to quantify interstitial changes and hypothesized that this measurement would be associated with lung function, quality of life, mortality, and a MUC5B polymorphism. METHODS: Using CT scans from the COPDGene study, lung parenchyma was objectively labeled as a tissue subtype and the percentage of the lung occupied by interstitial subtypes was calculated...
May 12, 2017: Chest
https://www.readbyqxmd.com/read/28506610/decreased-serum-sirtuin-1-in-chronic-obstructive-pulmonary-disease
#13
Satoru Yanagisawa, Andriana I Papaioannou, Anastasia Papaporfyriou, Jonathan Baker, Chaitanya Vuppusetty, Stelios Loukides, Peter J Barnes, Kazuhiro Ito
BACKGROUND: The protein deacetylase sirtuin-1 (SIRT1) is an anti-aging molecule that is decreased in the lung from patients with chronic obstructive pulmonary disease (COPD). Recently, SIRT1 was reported to be detectable in serum, but serum SIRT1 levels have not yet been reported in patients with COPD. METHODS: Serum SIRT1 was measured by Western blotting, and relative ratio of band density in samples against that of a positive control were calculated. RESULTS: Several molecular sizes of SIRT1, including 120kDa (actual size) and fragments (102, 75kDa) were quantified by Western blotting...
May 12, 2017: Chest
https://www.readbyqxmd.com/read/28506308/attenuating-immune-pathology-using-a-microbial-based-intervention-in-a-mouse-model-of-cigarette-smoke-induced-lung-inflammation
#14
Mark Bazett, Agnieszka Biala, Ryan D Huff, Matthew R Zeglinksi, Philip M Hansbro, Momir Bosiljcic, Hal Gunn, Shirin Kalyan, Jeremy A Hirota
BACKGROUND: Cigarette smoke exposure is the major risk factor for developing COPD. Presently, available COPD treatments focus on suppressing inflammation and providing bronchodilation. However, these options have varying efficacy in controlling symptoms and do not reverse or limit the progression of COPD. Treatments strategies using bacterial-derived products have shown promise in diseases characterized by inflammation and immune dysfunction. This study investigated for the first time whether a novel immunotherapy produced from inactivated Klebsiella (hereafter referred to as KB) containing all the major Klebsiella macromolecules, could attenuate cigarette smoke exposure-induced immune responses...
May 15, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28504839/the-pathological-trento-variant-of-alpha-1-antitrypsin-e75v-shows-non-classical-behaviour-during-polymerization
#15
Elena Miranda, Ilaria Ferrarotti, Romina Berardelli, Mattia Laffranchi, Marta Cerea, Fabrizio Gangemi, Imran Haq, Stefania Ottaviani, David A Lomas, James A Irving, Annamaria Fra
Severe alpha-1-antitrypsin deficiency (AATD) is most frequently associated with the alpha-1-antitrypsin (AAT) Z variant (E342K). ZZ homozygotes exhibit accumulation of AAT as polymers in the endoplasmic reticulum of hepatocytes. This protein deposition can lead to liver disease, with the resulting low circulating levels of AAT predisposing to early-onset emphysema due to dysregulation of elastinolytic activity in the lungs. An increasing number of rare AAT alleles have been identified in patients with severe AATD, typically in combination with the Z allele...
May 15, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28502975/an-unusual-presentation-of-acute-fibrinous-and-organizing-pneumonia
#16
Rami Jabbour, Hanesh Kumar, Shaheen Alvi, Varalaxmi Bhavani Nannaka, Masooma Niazi, Madanmohan Patel, Sridhar Chilimuri
BACKGROUND Acute fibrinous and organizing pneumonia (AFOP) is a newly evolving rare non-infectious lung pathology, characterized by intra-alveolar fibrin balls on histology. It is often difficult to diagnose and is usually mistaken for other lung pathologies. We present an interesting case of AFOP with unusual radiologic findings and disease course. CASE REPORT A 56-year-old woman presented with a 1-day history of high-grade fever, chills, and profuse sweating. She was febrile to 101.2 degree Fahrenheit on presentation...
May 15, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28501412/sudden-death-in-a-diver-a-diagnostic-conundrum
#17
Scott Dougherty, Maziar Khorsandi, Myra Adelbai, Vipin Zamvar, James Francis
We discuss the case of an experienced diver who ran out of air during his final ascent while scuba diving. He lost consciousness rapidly after surfacing and despite immediate cardiopulmonary resuscitation, could not be revived. On arrival at the emergency department he was noted to have copious amounts of blood in his upper airway and had developed extensive subcutaneous emphysema. Large amounts of air were observed in the central circulation following a postmortem computerized tomography scan as well as pneumomediastinum, a small right-sided hemothorax, and extensive subcutaneous emphysema...
May 10, 2017: Wilderness & Environmental Medicine
https://www.readbyqxmd.com/read/28498082/the-safety-and-feasibility-of-re-treating-patients-with-severe-emphysema-with-endobronchial-coils-a-pilot-study
#18
Jorine E Hartman, Karin Klooster, Nick H T Ten Hacken, Dirk-Jan Slebos
Severe emphysema patients who have been treated with endobronchial coils have been shown to initially benefit, but slowly decline in the years thereafter. Re-treating a patient with endobronchial coils could potentially lead to new improvements and may again reduce the rate of further decline. To our knowledge, until now, no results are published about patients who are re-treated. The primary aim of this study is to investigate the safety and feasibility of re-treating severe emphysema patients with endobronchial coils, using the PneumRx coil system...
May 12, 2017: COPD
https://www.readbyqxmd.com/read/28496537/post-colonoscopy-colonic-perforation-presenting-with-subcutaneous-emphysema-a-case-report
#19
Muhammad Khan, Muhammad Ijaz, Sumera Bukhari, Ahmed Dirweesh, Donald Christmas
Colonoscopy is performed for both diagnostic and therapeutic indications. Although rare, associated complications can be quite serious. The frequency of these complications depends mainly on the skills of the physicians doing the procedure, and the diagnostic or therapeutic indications. Major complications include adverse anesthetic related events, aspiration pneumonia, bleeding, and colonic perforation. We present a rare case of a post-colonoscopy perforation presenting with subcutaneous emphysema and free mediastinal, and intra-peritoneal air...
April 2017: Gastroenterology Research
https://www.readbyqxmd.com/read/28496314/treatment-of-lung-disease-in-alpha-1-antitrypsin-deficiency-a-systematic-review
#20
REVIEW
Ross G Edgar, Mitesh Patel, Susan Bayliss, Diana Crossley, Elizabeth Sapey, Alice M Turner
BACKGROUND: Alpha-1 antitrypsin deficiency (AATD) is a rare genetic condition predisposing individuals to chronic obstructive pulmonary disease (COPD). The treatment is generally extrapolated from COPD unrelated to AATD; however, most COPD trials exclude AATD patients; thus, this study sought to systematically review AATD-specific literature to assist evidence-based patient management. METHODS: Standard review methodology was used with meta-analysis and narrative synthesis (PROSPERO-CRD42015019354)...
2017: International Journal of Chronic Obstructive Pulmonary Disease
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