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Pulmonary physiology

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https://www.readbyqxmd.com/read/29345368/therapeutic-effect-of-lipoxin-a4-%C3%A2-in-malaria-induced-acute-lung-injury
#1
Tatiana A Pádua, Natalia D Torres, André L P Candéa, Maria Fernanda Souza Costa, Johnatas D Silva, João Luiz Silva-Filho, Fabio T M Costa, Patricia R M Rocco, Mariana C Souza, Maria G Henriques
Acute lung injury (ALI) models are characterized by neutrophil accumulation, tissue damage, alteration of the alveolar capillary membrane, and physiological dysfunction. Lipoxin A4  (LXA4 ) is an anti-inflammatory eicosanoid that was demonstrated to attenuate lipopolysaccharide-induced ALI. Experimental models of severe malaria can be associated with lung injury. However, to date, a putative effect of LXA4  on malaria (M)-induced ALI has not been addressed. In this study, we evaluated whether LXA4 exerts an effect on M-ALI...
January 3, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29344379/changes-in-contractile-protein-expression-are-linked-to-ventricular-stiffness-in-infants-with-pulmonary-hypertension-or-right-ventricular-hypertrophy-due-to-congenital-heart-disease
#2
Andrew R Bond, Dominga Iacobazzi, Safa Abdul-Ghani, Mohammed Ghorbel, Kate Heesom, Mariangela Wilson, Christopher Gillett, Sarah J George, Massimo Caputo, Saadeh Suleiman, Robert M R Tulloh
Background: The right ventricle (RV) is not designed to sustain high pressure leading to failure. There are no current medications to help RV contraction, so further information is required on adaption of the RV to such hypertension. Methods: The Right Ventricle in Children (RVENCH) study assessed infants with congenital heart disease undergoing cardiac surgery with hypertensive RV. Clinical and echocardiographic data were recorded, and samples of RV were taken from matched infants, analysed for proteomics and compared between pathologies and with clinical and echocardiographic outcome data...
2018: Open Heart
https://www.readbyqxmd.com/read/29341986/pulmonary-dead-space-fraction-and-extubation-success-in-children-after-cardiac-surgery
#3
Renee L Devor, Paul Kang, Chasity Wellnitz, John J Nigro, Daniel A Velez, Brigham C Willis
OBJECTIVES: 1) Determine the correlation between pulmonary dead space fraction and extubation success in postoperative pediatric cardiac patients; and 2) document the natural history of pulmonary dead space fractions, dynamic compliance, and airway resistance during the first 72 hours postoperatively in postoperative pediatric cardiac patients. DESIGN: A retrospective chart review. SETTING: Cardiac ICU in a quaternary care free-standing children's hospital...
January 16, 2018: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/29339836/the-role-of-metabolic-enzymes-in-mesenchymal-tumors-and-tumor-syndromes-genetics-pathology-and-molecular-mechanisms
#4
REVIEW
Inga-Marie Schaefer, Jason L Hornick, Judith V M G Bovée
The discovery of mutations in genes encoding the metabolic enzymes isocitrate dehydrogenase (IDH), succinate dehydrogenase (SDH), and fumarate hydratase (FH) has expanded our understanding not only of altered metabolic pathways but also epigenetic dysregulation in cancer. IDH1/2 mutations occur in enchondromas and chondrosarcomas in patients with the non-hereditary enchondromatosis syndromes Ollier disease and Maffucci syndrome and in sporadic tumors. IDH1/2 mutations result in excess production of the oncometabolite (D)-2-hydroxyglutarate...
January 16, 2018: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/29339033/helminth-modulation-of-lung-inflammation
#5
REVIEW
Christian Schwartz, Emily Hams, Padraic G Fallon
Parasitic helminths must establish chronic infections to complete their life cycle and therefore are potent modulators of multiple facets of host physiology. Parasitic helminths have coevolved with humans to become arguably master selectors of our immune system, whereby they have impacted on the selection of genes with beneficial mutations for both host and parasite. While helminth infections of humans are a significant health burden, studies have shown that helminths or helminth products can alter susceptibility to unrelated infectious or inflammatory diseases...
January 12, 2018: Trends in Parasitology
https://www.readbyqxmd.com/read/29335764/pulmonary-18f-fdg-uptake-helps-refine-current-risk-stratification-in-idiopathic-pulmonary-fibrosis-ipf
#6
Thida Win, Nicholas J Screaton, Joanna C Porter, Balaji Ganeshan, Toby M Maher, Francesco Fraioli, Raymondo Endozo, Robert I Shortman, Lynn Hurrell, Beverley F Holman, Kris Thielemans, Alaleh Rashidnasab, Brian F Hutton, Pauline T Lukey, Aiden Flynn, Peter J Ell, Ashley M Groves
PURPOSE: There is a lack of prognostic biomarkers in idiopathic pulmonary fibrosis (IPF) patients. The objective of this study is to investigate the potential of 18F-FDG-PET/ CT to predict mortality in IPF. METHODS: A total of 113 IPF patients (93 males, 20 females, mean age ± SD: 70 ± 9 years) were prospectively recruited for 18F-FDG-PET/CT. The overall maximum pulmonary uptake of 18F-FDG (SUVmax), the minimum pulmonary uptake or background lung activity (SUVmin), and target-to-background (SUVmax/ SUVmin) ratio (TBR) were quantified using routine region-of-interest analysis...
January 16, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29334496/oxygen-in-the-critically-ill-friend-or-foe
#7
Elisa Damiani, Abele Donati, Massimo Girardis
PURPOSE OF REVIEW: To examine the potential harmful effects of hyperoxia and summarize the results of most recent clinical studies evaluating oxygen therapy in critically ill patients. RECENT FINDINGS: Excessive oxygen supplementation may have detrimental pulmonary and systemic effects because of enhanced oxidative stress and inflammation. Hyperoxia-induced lung injury includes altered surfactant protein composition, reduced mucociliary clearance and histological damage, resulting in atelectasis, reduced lung compliance and increased risk of infections...
January 12, 2018: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/29331855/retrievable-inferior-vena-cava-filters-in-pregnancy-risk-versus-benefit
#8
REVIEW
David A Crosby, Kevin Ryan, Niall McEniff, Patrick Dicker, Carmen Regan, Caoimhe Lynch, Bridgette Byrne
OBJECTIVE: Venous thromboembolism remains one of the leading causes of maternal mortality in the developed world. Retrievable inferior vena cava (IVC) filters have a role in the prevention of lethal pulmonary emboli when anticoagulation is contraindicated or has failed [1]. It is unclear whether or not the physiological changes in pregnancy influence efficacy and complications of these devices. The decision to place an IVC filter in pregnancy is complex and there is limited information in terms of benefit and risk to the mother...
December 21, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29331337/elastin-in-lung-development-and-disease-pathogenesis
#9
REVIEW
Robert P Mecham
Elastin is expressed in most tissues that require elastic recoil. The protein first appeared coincident with the closed circulatory system, and was critical for the evolutionary success of the vertebrate lineage. Elastin is expressed by multiple cell types in the lung, including mesothelial cells in the pleura, smooth muscle cells in airways and blood vessels, endothelial cells, and interstitial fibroblasts. This highly crosslinked protein associates with fibrillin-containing microfibrils to form the elastic fiber, which is the physiological structure that functions in the extracellular matrix...
January 10, 2018: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/29330837/computer-simulated-modeling-of-healthy-and-diseased-right-ventricular-and-pulmonary-circulation
#10
Jody Chou, Joseph B Rinehart
We have previously developed a simulated cardiovascular physiology model for in-silico testing and validation of novel closed-loop controllers. To date, a detailed model of the right heart and pulmonary circulation was not needed, as previous controllers were not intended for use in patients with cardiac or pulmonary pathology. With new development of controllers for vasopressors, and looking forward, for combined vasopressor-fluid controllers, modeling of right-sided and pulmonary pathology is now relevant to further in-silico validation, so we aimed to expand our existing simulation platform to include these elements...
January 12, 2018: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/29325683/physical-activity-in-daily-life-in-patients-with-idiopathic-pulmonary-fibrosis
#11
Osamu Nishiyama, Ryo Yamazaki, Hiroyuki Sano, Takashi Iwanaga, Yuji Higashimoto, Hiroaki Kume, Yuji Tohda
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is characterized by progressive impairment of lung function and degradation of daily activity; however, this degradation has not been adequately elucidated. The objective of this study was to measure the physical activity of patients with IPF to determine its relationships with physiological parameters and survival rate. METHODS: In total, 31 patients with IPF and 20 age-matched healthy participants were enrolled in this study...
January 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29317351/a-new-physiological-model-for-studying-the-effect-of-chest-compression-and-ventilation-during-cardiopulmonary-resuscitation-the-thiel-cadaver
#12
Emmanuel Charbonney, Stéphane Delisle, Dominique Savary, Gilles Bronchti, Marceau Rigollot, Adrien Drouet, Bilal Badat, Paul Ouellet, Patrice Gosselin, Alain Mercat, Laurent Brochard, Jean-Christophe M Richard
BACKGROUND: Studying ventilation and intrathoracic pressure (ITP) induced by chest compressions (CC) during Cardio Pulmonary Resuscitation is challenging and important aspects such as airway closure have been mostly ignored. We hypothesized that Thiel Embalmed Cadavers could constitute an appropriate model. METHODS: We assessed respiratory mechanics and ITP during CC in 11 cadavers, and we compared it to measurements obtained in 9 out-of-hospital cardiac arrest patients and to predicted values from a bench model...
January 6, 2018: Resuscitation
https://www.readbyqxmd.com/read/29317199/polarized-light-microscopy-reveals-physiological-and-drug-induced-changes-in-surfactant-membrane-assembly-in-alveolar-type-ii-pneumocytes
#13
Thomas Haller, Alejandro Cerrada, Kristian Pfaller, Peter Braubach, Edward Felder
In alveolar type II (AT II) cells, pulmonary surfactant (PS) is synthetized, stored and exocytosed from lamellar bodies (LBs), specialized large secretory organelles. By applying polarization microscopy (PM), we confirm a specific optical anisotropy of LBs, which indicates a liquid-crystalline mesophase of the stored surfactant phospholipids (PL) and an unusual case of a radiation-symmetric, spherocrystalline organelle. Evidence is shown that the degree of anisotropy is dependent on the amount of lipid layers and their degree of hydration, but unaffected by acutely modulating vital cell parameters like intravesicular pH or cellular energy supply...
January 6, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29316977/the-lung-tissue-microbiota-of-mild-and-moderate-chronic-obstructive-pulmonary-disease
#14
Alexa A Pragman, Tianmeng Lyu, Joshua A Baller, Trevor J Gould, Rosemary F Kelly, Cavan S Reilly, Richard E Isaacson, Chris H Wendt
BACKGROUND: Oral taxa are often found in the chronic obstructive pulmonary disease (COPD) lung microbiota, but it is not clear if this is due to a physiologic process such as aspiration or experimental contamination at the time of specimen collection. METHODS: Microbiota samples were obtained from nine subjects with mild or moderate COPD by swabbing lung tissue and upper airway sites during lung lobectomy. Lung specimens were not contaminated with upper airway taxa since they were obtained surgically...
January 9, 2018: Microbiome
https://www.readbyqxmd.com/read/29316890/risk-factors-of-postoperative-pulmonary-complications-in-patients-with-asthma-and-copd
#15
Takanori Numata, Katsutoshi Nakayama, Satoko Fujii, Yoko Yumino, Nayuta Saito, Masahiro Yoshida, Yusuke Kurita, Kenji Kobayashi, Saburo Ito, Hirofumi Utsumi, Haruhiko Yanagisawa, Mitsuo Hashimoto, Hiroshi Wakui, Shunsuke Minagawa, Takeo Ishikawa, Hiromichi Hara, Jun Araya, Yumi Kaneko, Kazuyoshi Kuwano
BACKGROUND: Postoperative pulmonary complications (PPC) in patients with pulmonary diseases remain to be resolved clinical issue. However, most evidence regarding PPC has been established more than 10 years ago. Therefore, it is necessary to evaluate perioperative management using new inhalant drugs in patients with obstructive pulmonary diseases. METHODS: April 2014 through March 2015, 346 adult patients with pulmonary diseases (257 asthma, 89 chronic obstructive pulmonary disease (COPD)) underwent non-pulmonary surgery except cataract surgery in our university hospital...
January 9, 2018: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29316273/pilot-project-physiologic-responses-to-a-high-intensity-active-video-game-with-copd-patients-tools-for-home-rehabilitation
#16
Andrée-Anne Parent, Vincent Gosselin-Boucher, Marilyn Houle-Peloquin, Claude Poirier, Alain-Steve Comtois
INTRODUCTION: Chronic Obstructive Pulmonary Disease (COPD) is a respiratory condition that causes a significant deterioration of the quality of life. However, exercise can improve the quality of life for COPD patients and it is for this reason previous study observed the effects of active video games to increase exercise. Using motion capture devices with short bursts of exercise never been tried with COPD patients. OBJECTIVES: The objective was to observe the feasibility of using this device safely and easily with COPD patients...
January 8, 2018: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29313589/role-of-clarithromycin-in-acute-exacerbations-of-chronic-obstructive-pulmonary-disease
#17
Agam Vora
The prevalence of chronic obstructive pulmonary disease (COPD) is increasing in under-developing and developing countries. As per current estimations, COPD will become the third leading cause of death globally, by 2030. Long-acting anti-cholinergic agents, β2-agonists, inhaled corticosteroids, antibiotics and mucolytics are few of the agents currently used in the treatment of COPD, which improve the symptoms and overall quality of life. Several of the important classes of antibiotics are used in the management of COPD including penicillins, cephalosporins, tetracyclines, fluoroquinolones, sulphonamides, aminoglycosides and macrolides...
September 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29313116/importance-of-dynamic-central-venous-pressure-in-fontan-circulation
#18
JeongHye Kim, Seiko Kuwata, Clara Kurishima, Yoichi Iwamoto, Hirotaka Ishido, Satoshi Masutani, Hideaki Senzaki
We tested our hypotheses that central venous pressure (CVP) shows an excessive increase in response to volume overload in Fontan circulation according to the extent of the reduction in venous capacitance (Cv), and that the maximum CVP after volume loading is associated with hepatic congestion. Changes in CVP after angiography (volume loading) were examined in 40 patients with Fontan circulation and 29 controls with biventricular circulation. CVP significantly increased with angiography in both groups, but the changes were much more evident in the Fontan group than in controls (3...
January 8, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29310560/staged-palliation-of-cyanotic-obstructive-lesions-with-a-modified-right-ventricular-outflow-procedure
#19
Sarosh P Batlivala, Mary K Hood, Jannika Dodge-Khatami, Divya Shakti, Mary B Taylor, Makram R Ebeid, Jorge D Salazar, Ali Dodge-Khatami
BACKGROUND: Traditional palliation for biventricular cyanotic congenital heart lesions often involves staging with systemic-to-pulmonary arterial shunts to secure pulmonary blood flow (PBF) in the newborn period prior to complete repair. However, shunts may lead to life-threatening events secondary to shunt occlusion or acute coronary steal. They may be associated with morbidity secondary to diastolic runoff, systemic steal and volume loading, and do not provide pulsatile flow which has the potential to promote pulmonary artery (PA) growth...
January 2018: World Journal for Pediatric & Congenital Heart Surgery
https://www.readbyqxmd.com/read/29308752/-systemic-pathologic-physiology-parameters-changes-in-sheep-drowning-a-control-study-in-freshwater-and-seawater
#20
Wanjie Yang, Qingguo Feng, Xiaozhi Liu, Qing Wang, Xuefeng Zhao, Rumei Zhang, Kai Wei, Hongyun Teng, Yumei Wang
OBJECTIVE: To compare the systemic pathologic physiology parameter changes in sheep drowning in freshwater and seawater. METHODS: The experimental animals were healthy crossbred sheep. According to the envelope method, 24 sheep were randomly divided into two groups, with 12 animals in each group. The animals in both groups were subjected to mechanical ventilation and analgesia and sedation, the drowning models were reproduced by injecting 10-25 mL/kg of seawater or freshwater into the endotracheal tube of animals...
January 2018: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
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