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https://www.readbyqxmd.com/read/29035391/a-gammaherpesvirus-provides-protection-against-allergic-asthma-by-inducing-the-replacement-of-resident-alveolar-macrophages-with-regulatory-monocytes
#1
Bénédicte Machiels, Mickael Dourcy, Xue Xiao, Justine Javaux, Claire Mesnil, Catherine Sabatel, Daniel Desmecht, François Lallemand, Philippe Martinive, Hamida Hammad, Martin Guilliams, Benjamin Dewals, Alain Vanderplasschen, Bart N Lambrecht, Fabrice Bureau, Laurent Gillet
The hygiene hypothesis postulates that the recent increase in allergic diseases such as asthma and hay fever observed in Western countries is linked to reduced exposure to childhood infections. Here we investigated how infection with a gammaherpesvirus affected the subsequent development of allergic asthma. We found that murid herpesvirus 4 (MuHV-4) inhibited the development of house dust mite (HDM)-induced experimental asthma by modulating lung innate immune cells. Specifically, infection with MuHV-4 caused the replacement of resident alveolar macrophages (AMs) by monocytes with regulatory functions...
October 16, 2017: Nature Immunology
https://www.readbyqxmd.com/read/29031422/modulation-of-alveolar-macrophage-innate-response-in-proinflammatory-pro-oxidant-and-infection-models-by-mint-extract-and-chemical-constituents-role-of-mapks
#2
Niket Yadav, Harish Chandra
There is a continuing need for discovering novel primary or adjunct therapeutic agents to treat inflammatory conditions and infections. Natural products have inspired the discovery of several modern therapeutics; however, there is a paucity of mechanistic information on their mode of action. This study investigated the therapeutic potential and mode of action of corn mint's (Mentha arvensis) leaf extract (ME) in alveolar macrophages (AMs) challenged with model pro-inflammatory (LPS), pro- oxidant (LPS or H2O2), and infection (Mycobacterium) agents and contribution of its dominant constituents rosmarinic acid, l-menthol, and l-menthone...
October 8, 2017: Immunobiology
https://www.readbyqxmd.com/read/29031221/effects-of-particulate-matter-from-straw-burning-on-lung-fibrosis-in-mice
#3
Yang Hu, Liu-Sheng Wang, Yan Li, Qiu-Hong Li, Chun-Lin Li, Jian-Min Chen, Dong Weng, Hui-Ping Li
OBJECTIVE: To investigate the impacts of particulate matter 2.5 (PM2.5) from straw burning on the acute exacerbation of lung fibrosis in mice and the preventive effects of N-acetylcysteine (NAC). METHODS: The composition, particle size, and 30-min concentration change in an exposure system of the PM2.5 from straw-burning were determined. Forty C57BL male mice were equally randomized to two groups: bleomycin (BLM)-induced lung fibrosis with an exposure to air (BLM+air) and BLM+PM2...
October 7, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29029603/the-pathophysiological-role-of-mitochondrial-oxidative-stress-in-lung-diseases
#4
REVIEW
Xiaojing Liu, Zhihong Chen
Mitochondria are critically involved in reactive oxygen species (ROS)-dependent lung diseases, such as lung fibrosis, asbestos, chronic airway diseases and lung cancer. Mitochondrial DNA (mtDNA) encodes mitochondrial proteins and is more sensitive to oxidants than nuclear DNA. Damage to mtDNA causes mitochondrial dysfunction, including electron transport chain impairment and mitochondrial membrane potential loss. Furthermore, damaged mtDNA also acts as a damage-associated molecular pattern (DAMP) that drives inflammatory and immune responses...
October 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29027827/triggering-receptor-expressed-on-myeloid-cells-in-the-pathogenesis-of-periodontitis-potential-novel-treatment-strategies
#5
Courtney P Rudick, Takanari Miyamoto, Melissa S Lang, Devendra K Agrawal
Periodontal diseases are polymicrobial inflammatory disorders of the tissue, ligament, and bone structures supporting teeth. Periodontitis (inflammation with corresponding loss of attachment) affects 40-50% of adults. Recently, members of the Triggering Receptor on Myeloid Cell (TREM) family have been studied to determine their relationship to these diseases. Areas covered: TREM-1 is a receptor expressed on the surface of PMNs, monocytes, macrophages, dendritic cells, vascular smooth muscle cells, and keratinocytes upregulated in the presence of periodontal inflammation...
October 13, 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/29023811/placental-growth-factor-inhibition-targets-pulmonary-angiogenesis-and-represents-a-novel-therapy-for-hepatopulmonary-syndrome-in-mice
#6
Sarah Raevens, Anja Geerts, Annelies Paridaens, Sander Lefere, Xavier Verhelst, Anne Hoorens, Jo Van Dorpe, Tania Maes, Ken R Bracke, Christophe Casteleyn, Bart Jonckx, Thomas Horvatits, Valentin Fuhrmann, Hans Van Vlierberghe, Christophe Van Steenkiste, Lindsey Devisscher, Isabelle Colle
Hepatopulmonary syndrome (HPS) is a severe complication of cirrhosis with increased risk of mortality. Pulmonary microvascular alterations are key features of HPS, but underlying mechanisms are incompletely understood, and studies on HPS are limited to rats. Placental growth factor (PlGF), a pro-angiogenic molecule that is selectively involved in pathological angiogenesis, may play an important role in HPS development, however, its role has never been investigated. In this study, we validated an HPS model by common bile duct ligation (CBDL) in mice, investigated the kinetic changes in pulmonary angiogenesis and inflammation during HPS development, and provide evidence for a novel therapeutic strategy by targeting pathological angiogenesis...
October 10, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29022837/critical-parameters-for-particle-based-pulmonary-delivery-of-chemotherapeutics
#7
Ali Dabbagh, Noor Hayaty Abu Kasim, Chai Hong Yeong, Tin Wui Wong, Noorsaadah Abdul Rahman
Targeted delivery of chemotherapeutics through the respiratory system is a potential approach to improve drug accumulation in the lung tumor, while decreasing their negative side effects. However, elimination by the pulmonary clearance mechanisms, including the mucociliary transport system, and ingestion by the alveolar macrophages, rapid absorption into the blood, enzymatic degradation, and low control over the deposition rate and location remain the main complications for achieving an effective pulmonary drug delivery...
October 12, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/29018444/mucosa-associated-lymphoid-tissue-lymphoma-translocation-protein-1-positively-modulates-matrix-metalloproteinase-9-production-in-alveolar-macrophages-upon-toll-like-receptor-7-signaling-and-influenza-virus-infection
#8
Yu-Hsiang Lee, Juin-Hua Huang, Tzu-Hsuan Chang, Hung-Chih Yang, Betty A Wu-Hsieh
Influenza A virus (IAV) infection causes significant morbidity and mortality worldwide. Matrix metalloproteinase-9 (MMP-9) degrades extracellular matrix and is involved in the pathology of influenza. It has been reported that MMP-9 mediates neutrophil migration in IAV infection. Whether alveolar macrophages, the first immune cells that encounter IAV, produce MMP-9, and the mechanism of its regulation have never been investigated. As Toll-like receptor 7 (TLR7) is one of the receptors in innate immune cells that recognize IAV, we used TLR7 agonists and IAV to stimulate alveolar macrophage MH-S cells, primary macrophages, and bone marrow neutrophils...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29018261/alveolar-macrophages-are-critical-for-broadly-reactive-antibody-mediated-protection-against-influenza-a-virus-in-mice
#9
Wenqian He, Chi-Jene Chen, Caitlin E Mullarkey, Jennifer R Hamilton, Christine K Wong, Paul E Leon, Melissa B Uccellini, Veronika Chromikova, Carole Henry, Kevin W Hoffman, Jean K Lim, Patrick C Wilson, Matthew S Miller, Florian Krammer, Peter Palese, Gene S Tan
The aim of candidate universal influenza vaccines is to provide broad protection against influenza A and B viruses. Studies have demonstrated that broadly reactive antibodies require Fc-Fc gamma receptor interactions for optimal protection; however, the innate effector cells responsible for mediating this protection remain largely unknown. Here, we examine the roles of alveolar macrophages, natural killer cells, and neutrophils in antibody-mediated protection. We demonstrate that alveolar macrophages play a dominant role in conferring protection provided by both broadly neutralizing and non-neutralizing antibodies in mice...
October 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/29017487/curcumin-is-a-promising-inhibitor-of-genotype-2-porcine-reproductive-and-respiratory-syndrome-virus-infection
#10
Taofeng Du, Yunpeng Shi, Shuqi Xiao, Na Li, Qin Zhao, Angke Zhang, Yuchen Nan, Yang Mu, Yani Sun, Chunyan Wu, Hongtao Zhang, En-Min Zhou
BACKGROUND: Porcine reproductive and respiratory syndrome virus (PRRSV) could lead to pandemic diseases and huge financial losses to the swine industry worldwide. Curcumin, a natural compound, has been reported to serve as an entry inhibitor of hepatitis C virus, chikungunya virus and vesicular stomatitis virus. In this study, we investigated the potential effect of curcumin on early stages of PRRSV infection. RESULTS: Curcumin inhibited infection of Marc-145 cells and porcine alveolar macrophages (PAMs) by four different genotype 2 PRRSV strains, but had no effect on the levels of major PRRSV receptor proteins on Marc-145 cells and PAMs or on PRRSV binding to Marc-145 cells...
October 10, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28989204/association-of-il-6-with-pm2-5-components-importance-of-characterizing-filter-based-pm2-5-following-extraction
#11
Courtney Roper, Lauren G Chubb, Leah Cambal, Brett Tunno, Jane E Clougherty, Cheryl Fattman, Steven E Mischler
Filter-based toxicology studies are conducted to establish the biological plausibility of the well-established health impacts associated with fine particulate matter (PM2.5) exposure. Ambient PM2.5 collected on filters is extracted into solution for toxicology applications, but frequently, characterization is nonexistent or only performed on filter-based PM2.5, without consideration of compositional differences that occur during the extraction processes. To date, the impact of making associations to measured components in ambient instead of extracted PM2...
January 2017: Water, Air, and Soil Pollution
https://www.readbyqxmd.com/read/28988576/alcohol-and-the-lung
#12
Ashish J Mehta, David M Guidot
Among the many organ systems affected by harmful alcohol use, the lungs are particularly susceptible to infections and injury. The mechanisms responsible for rendering people with alcohol use disorder (AUD) vulnerable to lung damage include alterations in host defenses of the upper and lower airways, disruption of alveolar epithelial barrier integrity, and alveolar macrophage immune dysfunction. Collectively, these derangements encompass what has been termed the "alcoholic lung" phenotype. Alcohol-related reductions in antioxidant levels also may contribute to lung disease in people with underlying AUD...
2017: Alcohol Research: Current Reviews
https://www.readbyqxmd.com/read/28987879/thioaptamer-targeted-discoidal-microparticles-increase-self-immunity-and-reduce-mycobacterium-tuberculosis-burden-in-mice
#13
Fransisca Leonard, Ngan P Ha, Preeti Sule, Jenolyn F Alexander, David E Volk, Ganesh L R Lokesh, Xuewu Liu, Jeffrey D Cirillo, David G Gorenstein, Jinyun Yuan, Soumya Chatterjee, Edward A Graviss, Biana Godin
Worldwide, tuberculosis (TB) remains one of the most prevalent infectious diseases causing morbidity and death in >1.5 million patients annually. Mycobacterium tuberculosis (Mtb), the etiologic agent of TB, usually resides in the alveolar macrophages. Current tuberculosis treatment methods require more than six months, and low compliance often leads to therapeutic failure and multidrug resistant strain development. Critical to improving TB-therapy is shortening treatment duration and increasing therapeutic efficacy...
October 4, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28982193/cysteamine-mediated-clearance-of-antibiotic-resistant-pathogens-in-human-cystic-fibrosis-macrophages
#14
Chandra L Shrestha, Kaivon D Assani, Hannah Rinehardt, Florentina Albastroiu, Shuzhong Zhang, Richard Shell, Amal O Amer, Larry S Schlesinger, Benjamin T Kopp
Members of the Burkholderia cepacia complex are virulent, multi-drug resistant pathogens that survive and replicate intracellularly in patients with cystic fibrosis (CF). We have discovered that B. cenocepacia cannot be cleared from CF macrophages due to defective autophagy, causing continued systemic inflammation and infection. Defective autophagy in CF is mediated through constitutive reactive oxygen species (ROS) activation of transglutaminase-2 (TG2), which causes the sequestration (accumulation) of essential autophagy initiating proteins...
2017: PloS One
https://www.readbyqxmd.com/read/28974738/a-potent-tartrate-resistant-acid-phosphatase-inhibitor-to-study-the-function-of-trap-in-alveolar-macrophages
#15
Carian E Boorsma, T Anienke van der Veen, Kurnia S S Putri, Andreia de Almeida, Christina Draijer, Thais Mauad, Gyorgy Fejer, Corry-Anke Brandsma, Maarten van den Berge, Yohan Bossé, Don Sin, Ke Hao, Anja Reithmeier, Göran Andersson, Peter Olinga, Wim Timens, Angela Casini, Barbro N Melgert
The enzyme tartrate resistant acid phosphatase (TRAP, two isoforms 5a and 5b) is highly expressed in alveolar macrophages, but its function there is unclear and potent selective inhibitors of TRAP are required to assess functional aspects of the protein. We found higher TRAP activity/expression in lungs of patients with chronic obstructive pulmonary disease (COPD) and asthma compared to controls and more TRAP activity in lungs of mice with experimental COPD or asthma. Stimuli related to asthma and/or COPD were tested for their capacity to induce TRAP...
October 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28974441/tyrosol-attenuates-lipopolysaccharide-induced-acute-lung-injury-by-inhibiting-the-inflammatory-response-and-maintaining-the-alveolar-capillary-barrier
#16
Yeon-Yong Kim, Soyoung Lee, Min-Jong Kim, Byeong-Cheol Kang, Hima Dhakal, Young-Ae Choi, Pil-Hoon Park, Hyukjae Choi, Tae-Yong Shin, Hyun Gyu Choi, Taeg Kyu Kwon, Dongwoo Khang, Sang-Hyun Kim
Acute lung injury (ALI) is a life-threatening disease characterized by increased pulmonary vascular permeability because of alveolar capillary barrier dysfunction and increased immune responses. This study determined the anti-inflammatory effect of tyrosol on lipopolysaccharide (LPS)-induced ALI and its underlying mechanisms of action. BALB/c mice were orally administered with tyrosol (0.1, 1, and 10 mg/kg) 1 h before an intratracheal injection of LPS (25 μg/50 μL). Oral treatment with tyrosol inhibited lung vascular permeability, histopathological changes, wet/dry lung weight ratio, and pulmonary vascular cell infiltration...
September 30, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28971377/microrna-expression-profiling-in-alveolar-macrophages-of-indigenous-chinese-tongcheng-pigs-infected-with-prrsv-in-vivo
#17
Xiang Zhou, Jennifer J Michal, Zhihua Jiang, Bang Liu
Porcine respiratory and reproductive syndrome (PRRS), caused by PRRS virus (PRRSV), is one of the most serious infectious diseases in the swine industry worldwide. Indigenous Chinese Tongcheng (TC) pigs reportedly show strong resistance to PRRSV infection. The miRNA expression profiles of porcine alveolar macrophages (PAMs) of control TC pigs and those infected with PRRSV in vivo were analyzed by high-throughput sequencing to explore changes induced by infection. A total of 182 known miRNAs including 101 miRNA-5p and 81 miRNA-3p were identified with 23 up-regulated differentially expressed miRNAs (DEmiRNAs) and 25 down-regulated DEmiRNAs...
October 2, 2017: Journal of Applied Genetics
https://www.readbyqxmd.com/read/28966213/elevated-serum-anti-gm-csf-antibodies-before-the-onset-of-autoimmune-pulmonary-alveolar-proteinosis-in-a-patient-with-sarcoidosis-and-systemic-sclerosis
#18
Mari Yamasue, Shin-Ichi Nureki, Yuko Usagawa, Tomoko Ono, Hiroyuki Matsumoto, Takamasa Kan, Jun-Ichi Kadota
Pulmonary alveolar proteinosis (PAP) is characterized by the accumulation of periodic acid-schiff stain-positive lipoproteinaceous materials in the alveolar space due to impaired surfactant clearance by alveolar macrophage. Autoimmune PAP is the most common form of PAP, but rarely accompanies collagen disease or sarcoidosis. We report here a rare case of autoimmune PAP preceded by systemic sclerosis and sarcoidosis. A 64-year-old woman was admitted to our hospital for blurred vision, muscle weakness of extremities, Raynaud's phenomenon, and exertional dyspnea...
2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28965656/effects-of-binge-alcohol-exposure-on-burkholderia-thailandensis-alveolar-macrophage-interaction
#19
Victor Jimenez, Ryan Moreno, Emily Kaufman, Heidie Hornstra, Erik Settles, Bart J Currie, Paul Keim, Fernando P Monroy
Alcohol consumption has diverse and well-documented effects on the human immune system and its ability to defend against infective agents. One example is melioidosis, a disease caused by infection with Burkholderia pseudomallei, which is of public health importance in Southeast Asia and Northern Australia, with an expanding global distribution. While B. pseudomallei infections can occur in healthy humans, binge alcohol use is progressively being recognized as a major risk factor. Although binge alcohol consumption has been considered as a risk factor for the development of melioidosis, no experimental studies have investigated the outcomes of alcohol exposure on Burkholderia spp...
November 2017: Alcohol
https://www.readbyqxmd.com/read/28965583/the-copper-dependent-lysyl-oxidases-contribute-to-the-pathogenesis-of-pulmonary-emphysema-in-chronic-obstructive-pulmonary-disease-patients
#20
Neziha Besiktepe, Ozgecan Kayalar, Ezel Ersen, Fusun Oztay
Abnormalities in the elastic fiber biology are seen in pulmonary emphysema (PE). The copper-dependent lysyl oxidases regulate the production and accumulation of elastic fibers in the connective tissue. This study focused on the relationship between lysyl oxidase (LOX), LOX-like protein 1 (LOXL1), and LOXL2 and PE pathogenesis. Lung samples with or without PE from patients with chronic obstructive lung disease (n=35) were used. Protein levels of elastin, LOX, LOXL1, LOXL2, hypoxia inducible factor 1-alpha (HIF-1α), copper metabolism domain containing-1 (COMMD1), and phosphatase and tensin homolog (PTEN) were assayed using microscopic and biochemical methods The emphysematous areas were characterized by enlargement of the alveoli, destruction of the alveolar structure, accumulation of macrophages in the alveolar lumens, and showed increased HIF-1α immunoreactivity...
December 2017: Journal of Trace Elements in Medicine and Biology
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