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Lung inflammation

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https://www.readbyqxmd.com/read/28231307/differential-regulation-of-c5a-receptor-1-in-innate-immune-cells-during-the-allergic-asthma-effector-phase
#1
Fanny Ender, Anna V Wiese, Inken Schmudde, Jing Sun, Tillman Vollbrandt, Peter König, Yves Laumonnier, Jörg Köhl
C5a drives airway constriction and inflammation during the effector phase of allergic asthma, mainly through the activation of C5a receptor 1 (C5aR1). Yet, C5aR1 expression on myeloid and lymphoid cells during the allergic effector phase is ill-defined. Recently, we generated and characterized a floxed green fluorescent protein (GFP)-C5aR1 knock-in mouse. Here, we used this reporter strain to monitor C5aR1 expression in airway, pulmonary and lymph node cells during the effector phase of OVA-driven allergic asthma...
2017: PloS One
https://www.readbyqxmd.com/read/28231019/pro-inflammatory-cytokines-impair-vitamin-d-induced-host-defense-in-cultured-airway-epithelial-cells
#2
Jasmijn A Schrumpf, Gimano D Amatngalim, Joris B Veldkamp, Renate M Verhoosel, Dennis K Ninaber, Soledad R Ordonez, Anne M van der Does, Henk P Haagsman, Pieter S Hiemstra
Vitamin D is a regulator of host defense against infections and induces expression of the antimicrobial peptide hCAP18/LL-37. Vitamin D deficiency is associated with chronic inflammatory lung diseases and respiratory infections. However, it is incompletely understood if and how (chronic) airway inflammation affects vitamin D metabolism and action. We hypothesized that long-term exposure of primary bronchial epithelial cells (PBEC) to pro-inflammatory cytokines alters their vitamin D metabolism, antibacterial activity and expression of hCAP18/LL-37...
February 23, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28230260/elevation-of-sharpin-protein-levels-in-prostate-adenocarcinomas-promotes-metastasis-and-impairs-patient-survivals
#3
Hai Huang, Tao Du, Yiming Zhang, Yiming Lai, Kaiwen Li, Xinxing Fan, Dingjun Zhu, Tianxin Lin, Kewei Xu, Jian Huang, Leyuan Liu, Zhenghui Guo
BACKGROUND: SHARPIN, SHANK-associated RH domain interacting protein, associates with a linear ubiquitin chain assembly complex (LUBAC) to regulate inflammation and immunity. It has been reported that SHARPIN is highly expressed in several human tumors including ovarian cancer and liver cancer. We found that SHARPIN is also highly expressed in prostate cancer cell lines of DU145, LNCAP, and PC-3. Suppression of SHARPIN caused an inhibition of NF-κB signal and decreases in tumorigenesis of cultured cells in NOD/SCID mouse model...
February 23, 2017: Prostate
https://www.readbyqxmd.com/read/28229922/mandevilla-longiflora-desf-pichon-improves-airway-inflammation-in-a-murine-model-of-allergic-asthma
#4
Danielle Ayr Tavares de Almeida, Suellen Iara Guirra Rosa, Thais Campos Dias da Cruz, Eduarda Pavan, Amílcar Sabino Damazo, Ilsamar Mendes Soares, Sérgio Donizeti Ascêncio, Antonio Macho, Domingos Tabajara de Oliveira Martins
ETHNOPHARMACOLOGICAL RELEVANCE: Mandevilla longiflora, popularly known as "velame" in central Brazil, is a subshrub and widely distributed in South America. Its xylopodium is used in the form of a decoction or infusion to treat inflammation and other ailments. AIM OF THE STUDY: This study aimed to evaluate the anti-inflammatory potential of M. longiflora in an in vivo model of ovalbumin-induced immediate hypersensitivity, identifying its effects on leukocyte infiltration, IgE and LTB4 levels, and Th2 cytokine production...
February 13, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28229819/dabigatran-aggravates-topoisomerase-i-peptide-loaded-dendritic-cells-induced-lung-and-skin-fibrosis
#5
Heena Mehta, Philippe-Olivier Goulet, Jade Desjardins, Gemma Pérez, Martial Koenig, Jean-Luc Senécal, Marika Sarfati
OBJECTIVES: Dysregulated coagulation cascade has been implicated in development of fibrosis in systemic sclerosis (SSc). Thrombin, a key mediator of the coagulation pathway, has both proinflammatory and procoagulant properties. Here, we evaluated the efficacy of oral dabigatran, a direct thrombin inhibitor, on topoisomerase I dendritic cells (TOPOIA DCs)-induced lung and skin fibrosis, an experimental model of SSc. METHODS: Mice were repeatedly immunized with TOPOIA DCs...
February 8, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28228416/cough-and-expiration-reflexes-elicited-by-inhaled-irritant-gases-are-intensified-in-ovalbumin-sensitized-mice
#6
Cheng Zhang, Ruei-Lung Lin, Jeff Hong, Mehdi Khosravi, Lu-Yuan Lee
This study was designed to determine the effect of active sensitization with ovalbumin (Ova) on cough responses to inhaled irritant gases in mice. Conscious mice moved freely in a recording chamber while the pressure change in the chamber, audio and video signals of the mouse movements were recorded simultaneously to measure the frequencies of cough reflex (CR) and expiration reflex (ER). To further verify the accuracy of cough analysis, the intra-pleural pressure was also recorded by a telemetry sensor surgically implanted in the intra-pleural space in a subgroup of mice...
February 22, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28227313/detection-of-crackle-events-using-a-multi-feature-approach
#7
L Mendes, I M Vogiatzis, E Perantoni, E Kaimakamis, I Chouvarda, N Maglaveras, J Henriques, P Carvalho, R P Paiva, L Mendes, I M Vogiatzis, E Perantoni, E Kaimakamis, I Chouvarda, N Maglaveras, J Henriques, P Carvalho, R P Paiva, I Chouvarda, P Carvalho, L Mendes, E Perantoni, R P Paiva, J Henriques, I M Vogiatzis, N Maglaveras, E Kaimakamis
The automatic detection of adventitious lung sounds is a valuable tool to monitor respiratory diseases like chronic obstructive pulmonary disease. Crackles are adventitious and explosive respiratory sounds that are usually associated with the inflammation or infection of the small bronchi, bronchioles and alveoli. In this study a multi-feature approach is proposed for the detection of events, in the frame space, that contain one or more crackles. The performance of thirty-five features was tested. These features include thirty-one features usually used in the context of Music Information Retrieval, a wavelet based feature as well as the Teager energy and the entropy...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225753/complement-drives-glucosylceramide-accumulation-and-tissue-inflammation-in-gaucher-disease
#8
Manoj K Pandey, Thomas A Burrow, Reena Rani, Lisa J Martin, David Witte, Kenneth D Setchell, Mary A Mckay, Albert F Magnusen, Wujuan Zhang, Benjamin Liou, Jörg Köhl, Gregory A Grabowski
Gaucher disease is caused by mutations in GBA1, which encodes the lysosomal enzyme glucocerebrosidase (GCase). GBA1 mutations drive extensive accumulation of glucosylceramide (GC) in multiple innate and adaptive immune cells in the spleen, liver, lung and bone marrow, often leading to chronic inflammation. The mechanisms that connect excess GC to tissue inflammation remain unknown. Here we show that activation of complement C5a and C5a receptor 1 (C5aR1) controls GC accumulation and the inflammatory response in experimental and clinical Gaucher disease...
February 22, 2017: Nature
https://www.readbyqxmd.com/read/28223796/stromelysin-2-mmp-10-facilitates-clearance-and-moderates-inflammation-and-cell-death-following-lung-exposure-to-long-multiwalled-carbon-nanotubes
#9
Tyler C Vandivort, Timothy P Birkland, Talita P Domiciano, Somenath Mitra, Terrance J Kavanagh, William C Parks
Multiwalled carbon nanotubes (MWCNTs) are nanomaterials composed of multiple layers of graphene cylinders with unique properties that make them valuable for a number of industries. However, rising global production has led to concerns regarding potential occupational exposures to them as raw materials during handling. This is especially true for long MWCNT fibers, whose aspect ratio has been posited to initiate pathology similar to that of asbestos. Matrix metalloproteinases (MMPs) are a class of extracellular endopeptidases that control various processes related to tissue repair, inflammation, and more...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28223486/serum-borne-bioactivity-caused-by-pulmonary-multiwalled-carbon-nanotubes-induces-neuroinflammation-via-blood-brain-barrier-impairment
#10
Mario J Aragon, Lauren Topper, Christina R Tyler, Bethany Sanchez, Katherine Zychowski, Tamara Young, Guy Herbert, Pamela Hall, Aaron Erdely, Tracy Eye, Lindsey Bishop, Samantha A Saunders, Pretal P Muldoon, Andrew K Ottens, Matthew J Campen
Pulmonary exposure to multiwalled carbon nanotubes (MWCNTs) causes indirect systemic inflammation through unknown pathways. MWCNTs translocate only minimally from the lungs into the systemic circulation, suggesting that extrapulmonary toxicity may be caused indirectly by lung-derived factors entering the circulation. To assess a role for MWCNT-induced circulating factors in driving neuroinflammatory outcomes, mice were acutely exposed to MWCNTs (10 or 40 µg/mouse) via oropharyngeal aspiration. At 4 h after MWCNT exposure, broad disruption of the blood-brain barrier (BBB) was observed across the capillary bed with the small molecule fluorescein, concomitant with reactive astrocytosis...
February 21, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28223398/exertional-dyspnoea-in-interstitial-lung-diseases-the-clinical-utility-of-cardiopulmonary-exercise-testing
#11
Matteo Bonini, Giuseppe Fiorenzano
Interstitial lung diseases (ILDs) represent a heterogeneous group of pathologies characterised by alveolar and interstitial damage, pulmonary inflammation (usually associated with fibrosis), decreased lung function and impaired gas exchange, which can be attributed to either a known or an unknown aetiology. Dyspnoea is one of the most common and disabling symptoms in patients with ILD, significantly impacting quality of life. The mechanisms causing dyspnoea are complex and not yet fully understood. However, it is recognised that dyspnoea occurs when there is an imbalance between the central respiratory efferent drive and the response of the respiratory musculature...
January 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28223235/interleukin-32-inflammation-and-cancer
#12
REVIEW
Jin Tae Hong, Dong Ju Son, Chong Kil Lee, Do-Young Yoon, Dong Hun Lee, Mi Hee Park
Interleukin-32 (IL-32) is a novel cytokine involved in inflammation and cancer development. IL-32 gene consists of eight small exons, and IL-32 mRNA has nine alternative spliced isoforms, and was thought to be secreted because it contains an internal signal sequence and lacks a transmembrane region. IL-32 is initially expressed selectively in activated T cells by mitogen and activated NK cells and their expression is strongly augmented by microbes, mitogens, and other cytokines. The IL-32 is induced mainly by pathogens and pro-inflammatory cytokines, but IL-32 is more prominent in immune cells than in non-immune tissues...
February 13, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28223218/preventative-effect-of-omz-spt-on-lipopolysaccharide-induced-acute-lung-injury-and-inflammation-via-nuclear-factor-kappa-b-signaling-in-mice
#13
Ting Wang, Wanru Hou, Zhou Fu
Acute lung injury (ALI) is an early pathophysiologic change in acute respiratory distress syndrome and its management can be challenging. Omalizumab (Xolair™) is a recombinant DNA-derived, humanized antibody. OMZ-SPT is a polypeptide on the heavy chain of omalizumab monoclonal antibody. Here, we found that intramuscular administration of OMZ-SPT significantly improved survival and attenuated lung inflammation in female C57BL/6 mice suffering from lipopolysaccharide (LPS)-induced ALI. We also demonstrated that OMZ-SPT can inhibit expression of the inflammatory cytokines tumor necrosis factor-α, interleukin-1β and interleukin-6 by ELISA in mice suffering from LPS-induced ALI and a mouse macrophage line (RAW264...
February 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28223152/pathological-findings-and-prognosis-in-a-large-prospective-cohort-of-chronic-hypersensitivity-pneumonitis
#14
Ping Wang, Kirk D Jones, Anatoly Urisman, Brett M Elicker, Thomas Urbania, Kerri A Johannson, Deborah Assayag, Joyce Lee, Paul J Wolters, Harold R Collard, Laura L Koth
BACKGROUND: The ability of specific histopathological features to predict mortality or lung transplant in chronic hypersensitivity pneumonitis patients is unknown. METHODS: Patients with chronic hypersensitivity pneumonitis diagnosed by surgical lung biopsy were identified from an ongoing longitudinal cohort. The surgical lung biopsy slides were evaluated prospectively by an experienced thoracic pathologist using a standardized checklist to differentiate the major pathologic patterns and score the presence of specific histopathological features...
February 18, 2017: Chest
https://www.readbyqxmd.com/read/28222269/restoring-cftr-function-reduces-airway-bacteria-and-inflammation-in-people-with-cystic-fibrosis-and-chronic-lung-infections
#15
Katherine B Hisert, Sonya L Heltshe, Christopher Pope, Peter Jorth, Xia Wu, Rachael M Edwards, Matthew Radey, Frank J Accurso, Daniel J Wolter, Gordon Cooke, Ryan J Adam, Suzanne Carter, Brenda Grogan, Jan L Launspach, Seamas C Donnelly, Charles Gallagher, James E Bruce, David Stoltz, Michael J Welsh, Lucas R Hoffman, Edward F McKone, Pradeep K Singh
RATIONALE: Previous work indicates that ivacaftor improves CFTR activity and lung function in people with cystic fibrosis (CF) and G551D-CFTR mutations, but does not reduce density of bacteria or markers of inflammation in the airway. These findings raise the possibility that infection and inflammation may progress independently of CFTR activity once CF lung disease is established. OBJECTIVES: To better understand the relationship between CFTR activity, airway microbiology and inflammation, and lung function in subjects with CF and chronic airway infections...
February 21, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28221763/inactivation-clearance-and-functional-effects-of-lung-instilled-short-and-long-silver-nanowires-in-rats
#16
Kian Fan Chung, Joanna Seiffert, Shu Chen, Ioannis G Theodorou, Angela Erin Goode, Bey Fen Leo, Catriona M McGilvery, Farhana Hussain, Coen Wiegman, Christos Rossios, Jie Zhu, Jicheng Gong, Farid Tariq, Vladimir Yufit, Alexander J Monteith, Teruo Hashimoto, Jeremy N Skepper, Mary P Ryan, Junfeng Jim Zhang, Teresa D Tetley, Alexandra E Porter
There is a potential for silver nanowires (AgNWs) to be inhaled but there is little information on their health effects and their chemical transformation inside the lungs in vivo. We studied the effects of short (S-AgNWs; 1.5µm) and long (L-AgNWs; 10 µm) nanowires instilled into the lungs of Sprague-Dawley rats. S- and L-AgNWs were phagocytosed and degraded by macrophages; there was no frustrated phagocytosis. Interestingly, both AgNWs were internalized in alveolar Type II epithelial cells (ATII), with precipitation of Ag2S on their surface as secondary Ag2S nanoparticles...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28220253/myd88-in-mycobacterium-tuberculosis-infection
#17
EDITORIAL
Jorge L Cervantes
MyD88 adaptor protein mediates numerous biologically important signal transduction pathways in innate immunity. MyD88 signaling fosters bacterial containment and is necessary to raise an adequate innate and acquired immune response to Mycobacterium tuberculosis (Mtb). The phagosome is a crucial cellular location not only for Mtb replication, but it is also where components of the Myddosome and inflammasome are recruited. Besides its function as a TLR-adaptor protein, MyD88 may help stabilizing cytosolic receptors that are recruited to the phagosome...
February 20, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28220116/cpg-odn-shapes-alum-adjuvant-activity-signaling-via-myd88-and-il-10
#18
Luciana Mirotti, Ricardo Wesley Alberca Custódio, Eliane Gomes, Florencia Rammauro, Eliseu Frank de Araujo, Vera Lucia Garcia Calich, Momtchilo Russo
Aluminum-containing adjuvants usually referred as Alum are considered as T helper type-2 (Th2) adjuvants, while agonists of toll-like receptors (TLRs) are viewed as adjuvants that favor Th1/Th17 immunity. Alum has been used in numerous vaccine formulations; however, its undesired pro-Th2 adjuvant activity constitutes a caveat for Alum-based vaccines. Combining Alum with TLR-dependent, pro-Th1/Th17 adjuvants might dampen the pro-Th2 activity and improve the effectiveness of vaccine formulations. Here, using the ovalbumin (OVA) model of allergic lung inflammation, we found that sensitization with the synthetic TLR9 agonist, which is composed of oligodeoxynucleotides containing CpG motifs adsorbed to Alum, inhibited the development of OVA-induced lung allergic Th2 responses without shifting toward a Th1 pattern...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28220034/exhaled-and-nasal-nitric-oxide-in-relation-to-lung-function-blood-cell-counts-and-disease-characteristics-in-cystic-fibrosis
#19
Christina Krantz, Christer Janson, Annika Hollsing, Kjell Alving, Andrei Malinovschi
BACKGROUND: Patients with CF have similar or lower exhaled nitric oxide (FeNO) and lower nasal nitric oxide (nNO) levels than controls. There are divergent results on alveolar NO (CalvNO) concentrations in relation to CF. There are inconsistent results on correlation between different nitric oxide parameters and lung function and inflammation in CF. AIM: To compare FeNO, CalvNO and nNO levels between subjects with CF, asthma and healthy controls and to study whether these parameters are related to lung function, blood cell counts or clinical characteristics in CF patients...
February 21, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28219838/natural-helper-cells-are-associated-with-the-exacerbated-airway-inflammation-seen-during-rsv-reinfection-of-neonatally-primed-mice
#20
Jianqi Wu, Haiyan Hu, Lei Xu, Feifei Qi, Song Bai, Yulin Cui, Ruonan Chai, Dandan Wang, Beixing Liu
Infection with respiratory syncytial virus (RSV) in neonatal mice causes more aggressive airway disease when the mice are reinfected with the same virus as adults. However, the underlying mechanisms responsible for this phenomenon are not entirely defined. Natural helper (NH) cells are considered a key factor for virus-induced or exacerbated airway inflammation and airway hyper-responsiveness by producing type 2 cytokines. To confirm whether NH cells are involved in the aggravated lung pathology seen during reinfection, BALB/c mice were initially infected as neonates and reinfected in adulthood...
February 16, 2017: International Immunopharmacology
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