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https://www.readbyqxmd.com/read/29679712/evaluating-the-genotoxicity-of-cellulose-nanofibrils-in-a-co-culture-of-human-lung-epithelial-cells-and-monocyte-derived-macrophages
#1
Célia Ventura, Ana Filipa Lourenço, António Sousa-Uva, Paulo J T Ferreira, Maria João Silva
Cellulose nanofibrils (CNF) are manufactured nanofibres that hold impressive expectations in forest, food, pharmaceutical, and biomedical industries. CNF production and applications are leading to an increased human exposure and thereby it is of utmost importance to assess its safety to health. In this study, we screened the cytotoxic, immunotoxic and genotoxic effects of a CNF produced by TEMPO-mediated oxidation of an industrial bleached Eucalyptus globulus kraft pulp on a co-culture of lung epithelial alveolar (A549) cells and monocyte-derived macrophages (THP-1 cells)...
April 18, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29679710/cpg-oligodeoxynucleotides-may-be-effective-for-preventing-ionizing-radiation-induced-pulmonary-fibrosis
#2
Chao Zhang, Hainan Zhao, Bai-Long Li, Fu-Gao, Hu Liu, Jian-Ming Cai
Pulmonary fibrosis is a serious adverse effect of radiotherapy for thoracic tumor, which is believed to be a process that is tightly regulated by the phenotype of the developing Th response after radiation. Here, we will investigate whether CpG-oligodeoxynucleotides (ODN) prevent radiation-induced pulmonary fibrosis by shifting the imbalance of Th1 and Th2 response and summarizes the possible mechanism. In this study, female C57BL/6 mice were chosen to preform pulmonary fibrosis model, the whole-thorax of mice was exposed to a single radiation dose of 15 Gy...
April 18, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29678179/expression-of-mate1-p-gp-octn1-and-octn2-in-epithelial-and-immune-cells-in-the-lung-of-copd-and-healthy-individuals
#3
Tove Berg, Tove Hegelund-Myrbäck, Johan Öckinger, Xiao-Hong Zhou, Marie Brännström, Michael Hagemann-Jensen, Viktoria Werkström, Janeric Seidegård, Johan Grunewald, Magnus Nord, Lena Gustavsson
BACKGROUND: Several inhaled drugs are dependent on organic cation transporters to cross cell membranes. To further evaluate their potential to impact on inhaled drug disposition, the localization of MATE1, P-gp, OCTN1 and OCTN2 were investigated in human lung. METHODS: Transporter proteins were analysed by immunohistochemistry in lung tissue from healthy subjects and COPD patients. Transporter mRNA was analysed by qPCR in lung tissue and in bronchoalveolar lavage (BAL) cells from smokers and non-smokers...
April 20, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29676627/effect-of-world-trade-center-dust-exposure-and-chronic-intermittent-hypoxia-on-macrophage-matrix-metalloproteinase-12-expression-in-mice
#4
Jared Radbel, Oanh Le-Hoang, Kinal N Vayas, Kaiwal Patel, Michael Goedken, Vasanthi R Sunil, Debra Laskin, Jag Sunderram
RATIONALE: The pathophysiologic mechanisms by which World Trade Center (WTC) dust exposure leads to pulmonary disease have not been established. Matrix metalloproteinase-12 (MMP-12) is involved in the development of pulmonary fibrosis and chronic obstructive pulmonary disease. We have previously shown that exposure of mice to WTC dust results in increased expression of matrix metalloproteinase 12 by alveolar macrophages. Matrix metalloproteinase 12 expression is regulated, in part, by oxidative stress, which is also increased after WTC dust exposure...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29675883/aurantio-obtusin-an-anthraquinone-from-cassiae-semen-ameliorates-lung-inflammatory-responses
#5
Ki Sun Kwon, Ju Hee Lee, Kyung Su So, Byung Kyu Park, Hyun Lim, Jae Sue Choi, Hyun Pyo Kim
The purpose of the present study is to find the natural compound(s) having a therapeutic potential to treat lung inflammatory disorders. In our screening procedure, the methanol extract of the seeds of Cassia obtusifolia (cassiae semen) inhibited inducible nitric oxide synthase-catalyzed nitric oxide production in alveolar macrophages (MH-S). From the extract, 8 major anthraquinone derivatives were successfully isolated. They are chrysophanol, physcion, 2-hydroxy-emodin 1-methyl ether, obtusifolin, obtusin, aurantio-obtusin, chryso-obtusin, and gluco-obtusifolin, among which aurantio-obtusin (IC50  = 71...
April 20, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29672626/engystol-reduces-onset-of-experimental-respiratory-syncytial-virus-induced-respiratory-inflammation-in-mice-by-modulating-macrophage-phagocytic-capacity
#6
Sabine Wronski, Julia Dannenmaier, Sabine Schild, Olaf Macke, Laura Müller, Yvonne Burmeister, Bernd Seilheimer, Meike Müller
BACKGROUND: Respiratory viruses such as respiratory syncytial virus (RSV) or rhinovirus are one of the major causes for respiratory tract infections causing common cold disease. Respiratory viral infections range from mild symptoms in adults to serious illness especially in the very young or elderly as well as patients suffering from lung diseases or being immunocompromised due to other reasons. Engystol (EGY-2) is a multicomponent, multitarget preparation consisting of Vincetoxicum hirundinaria and Sulfur in various dilutions...
2018: PloS One
https://www.readbyqxmd.com/read/29671604/neuropilin-2-regulates-airway-inflammatory-responses-to-inhaled-lipopolysaccharide
#7
Robert M Immormino, David C Lauzier, Hideki Nakano, Michelle L Hernandez, Neil E Alexis, Andrew L Ghio, Stephen L Tilley, Claire M Doerschuk, David B Peden, Donald N Cook, Timothy P Moran
Neuropilins are multifunctional receptors that play important roles in immune regulation. Neuropilin-2 (NRP2) is expressed in the lungs, but whether it regulates airway immune responses is unknown. Here, we report that Nrp2 is weakly expressed by alveolar macrophages (AM) in the steady-state, but is dramatically up-regulated following in vivo lipopolysaccharide (LPS) inhalation. Ex vivo treatment of human AM with LPS also increased NRP2 mRNA expression and cell-surface display of NRP2 protein. LPS-induced Nrp2 expression in AM was dependent upon the MyD88 signaling pathway and the transcription factor nuclear factor kappa B (NFκB)...
April 19, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29670919/dysregulated-functions-of-lung-macrophage-populations-in-copd
#8
REVIEW
Theodore S Kapellos, Kevin Bassler, Anna C Aschenbrenner, Wataru Fujii, Joachim L Schultze
Chronic obstructive pulmonary disease (COPD) is a diverse respiratory disease characterised by bronchiolitis, small airway obstruction, and emphysema. Innate immune cells play a pivotal role in the disease's progression, and in particular, lung macrophages exploit their prevalence and strategic localisation to orchestrate immune responses. To date, alveolar and interstitial resident macrophages as well as blood monocytes have been described in the lungs of patients with COPD contributing to disease pathology by changes in their functional repertoire...
2018: Journal of Immunology Research
https://www.readbyqxmd.com/read/29667749/effect-of-lysm-macrophage-depletion-on-lung-pathology-in-mice-with-chronic-bronchitis
#9
Yogesh Saini, Brandon W Lewis, Dongfang Yu, Hong Dang, Alessandra Livraghi-Butrico, Fabio Del Piero, Wanda K O'Neal, Richard C Boucher
Macrophages (MΦ) are key sentinels of respiratory exposure to inhaled environmental stimuli. In normal "healthy" tissues, MΦ are believed to be a dormant cell type that, upon exposure to stress-causing stimuli, may get activated to exhibit pro- or anti-inflammatory roles. To test whether stress present in chronic bronchitic (CB) airways triggers MΦ to manifest protective or detrimental responses, the DTA+ (LysM-regulated Diphtheria Toxin A expressing) strain with partial MΦ-deficiency was crossed with the Scnn1b-Tg mouse model of CB and the progenies were studied at 4-5 weeks of age...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29663334/the-rheumatic-disease-associated-fam167a-blk-locus-encodes-diora-1-a-novel-disordered-protein-highly-expressed-in-bronchial-epithelium-and-alveolar-macrophages
#10
Lara Mentlein, Gudny Ella Thorlacius, Lauro Meneghel, Lara A Aqrawi, Jorge I Ramírez Sepúlveda, Johan Grunewald, Alexander Espinosa, Marie Wahren-Herlenius
OBJECTIVES: Triggering of autoimmunity that leads to rheumatic disease has been suggested to depend on gene-environment interactions occurring in epithelial barriers and associated immune cells. Genetic studies have identified associations of the FAM167A-BLK locus with rheumatoid arthritis, SLE, and Sjögren's syndrome. While BLK (B lymphocyte kinase) has a well-established role in B cells, family with sequence similarity 167 member A (FAM167A) and its gene family remain uncharacterized...
April 17, 2018: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29655569/activation-of-the-porcine-alveolar-macrophages-via-toll-like-receptor-4-nf-%C3%AE%C2%BAb-mediated-pathway-provides-a-mechanism-of-resistin-leading-to-inflammation
#11
Bi Li, Jing Fang, Zhicai Zuo, Sirui Yin, Tingting He, Mingxian Yang, Junliang Deng, Liuhong Shen, Xiaoping Ma, Shumin Yu, Ya Wang, Zhihua Ren, Hengmin Cui
Resistin, a previously discovered cysteine-rich adipokine known to regulate glucose metabolism, has been emerged as a mediator in inflammation and immunity. Its level was supposed to be related to the expression of indicators, such as interleukin-1β (IL-1β), IL-6 and tumor necrosis factor-α (TNF-α) in inflammation. Toll-like receptor 4 (TLR4) was reported to be a receptor for resistin in cells, like leukocytes and peripheral blood mononuclear cells (PBMC). However, the pro-inflammatory role of resistin and its intracellular mechanisms in alveolar macrophages have not been thoroughly validated...
April 11, 2018: Cytokine
https://www.readbyqxmd.com/read/29652608/immunomodulatory-role-of-stem-cell-from-human-exfoliated-deciduous-teeth-on-periodontal-regeneration
#12
Xianling Gao, Zongshan Shen, Meiliang Guan, Qiting Huang, Lingling Chen, Wei Qin, Xiaohu Ge, Haijia Chen, Yin Xiao, Zhengmei Lin
Periodontitis is initiated by the infection of periodontal bacteria and subsequent tissue inflammation due to immunoreaction, eventually leading to periodontal apparatus loss. Stem cells from human exfoliated deciduous teeth (SHEDs) have exhibited beneficial characteristics in dental tissue regeneration. However, the immunomodulatory functions of SHEDs have not been elucidated in the context of periodontitis treatment. In this study, we investigated the potential immunomodulatory effects of SHEDs on experimental periodontitis and demonstrated that multi-dose delivery of SHEDs led to periodontal tissue regeneration...
March 20, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29652170/pulmonary-transplantation-of-human-ipsc-derived-macrophages-ameliorates-pulmonary-alveolar-proteinosis
#13
Christine Happle, Nico Lachmann, Mania Ackermann, Anja Mirenska, Gudrun Göhring, Kathrin Thomay, Adele Mucci, Miriam Hetzel, Torsten Glomb, Takuji Suzuki, Claudia Chalk, Silke Glage, Oliver Dittrich-Breiholz, Bruce Trapnell, Thomas Moritz, Gesine Hansen
Rationale While the transplantation of induced pluripotent stem cell (iPSC)-derived cells harbors enormous potential for the treatment of pulmonary diseases, in vivo data demonstrating clear therapeutic benefits of human iPSC-derived cells in lung disease models is missing. Objective We here tested the therapeutic potential of iPSC-derived macrophages in a humanized disease model of hereditary pulmonary alveolar proteinosis (herPAP). herPAP is caused by a genetic defect of the GM-CSF-receptor, which leads to disturbed macrophage differentiation and protein/surfactant degradation in the lungs subsequently resulting in severe respiratory insufficiency...
April 13, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29650962/vascular-endothelial-growth-factor-mediates-the-therapeutic-efficacy-of-mesenchymal-stem-cell-derived-extracellular-vesicles-against-neonatal-hyperoxic-lung-injury
#14
So Yoon Ahn, Won Soon Park, Young Eun Kim, Dong Kyung Sung, Se In Sung, Jee Yin Ahn, Yun Sil Chang
We previously reported the role of vascular endothelial growth factor (VEGF) secreted by mesenchymal stem cells (MSCs) in protecting against neonatal hyperoxic lung injuries. Recently, the paracrine protective effect of MSCs was reported to be primarily mediated by extracellular vesicle (EV) secretion. However, the therapeutic efficacy of MSC-derived EVs and the role of the VEGF contained within EVs in neonatal hyperoxic lung injury have not been elucidated. The aim of the study was to determine whether MSC-derived EVs attenuate neonatal hyperoxic lung injury and, if so, whether this protection is mediated via the transfer of VEGF...
April 13, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29650461/towards-designing-a-synthetic-antituberculosis-vaccine-the-rv3587c-peptide-inhibits-mycobacterial-entry-to-host-cells
#15
Mary Lilian Carabali-Isajar, Marisol Ocampo, Deisy Carolina Rodriguez, Magnolia Vanegas, Hernando Curtidor, Manuel Alfonso Patarroyo, Manuel Elkin Patarroyo
Mycobacterium tuberculosis is considered one of the most successful pathogens in the history of mankind, having caused 1.7 million deaths in 2016. The amount of resistant and extensively resistant strains has increased; BCG has been the only vaccine to be produced in more than 100 years though it is still unable to prevent the disease's most disseminated form in adults; pulmonary tuberculosis. The search is thus still on-going for candidate antigens for an antituberculosis vaccine. This paper reports the use of a logical and rational methodology for finding such antigens, this time as peptides derived from the Rv3587c membrane protein...
April 4, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29649906/knockdown-of-lncrna-malat1-contributes-to-the-suppression-of-inflammatory-responses-by-up-regulating-mir-146a-in-lps-induced-acute-lung-injury
#16
Lingling Dai, Guojun Zhang, Zhe Cheng, Xi Wang, Liuqun Jia, Xiaogang Jing, Huan Wang, Rui Zhang, Meng Liu, Tianci Jiang, Yuanjian Yang, Meng Yang
BACKGROUND: Acute lung injury (ALI) is a type of severe pulmonary inflammatory disease with high rates of morbidity and mortality. Now, an increasing number of studies suggest that lncRNAs may act as key regulators of the inflammatory response and play a crucial role in the pathogenesis of many inflammatory diseases. Our study firstly explored the function and underlying mechanism of lncRNA metastasis-associated lung adenocarcinoma transcription 1 (MALAT1) in regulating the inflammatory response of lipopolysaccharide (LPS)-induced ALI in rats...
April 13, 2018: Connective Tissue Research
https://www.readbyqxmd.com/read/29649237/bronchoalveolar-lavage-bal-cells-in-idiopathic-pulmonary-fibrosis-express-a-complex-pro-inflammatory-pro-repair-angiogenic-activation-pattern-likely-associated-with-macrophage-iron-accumulation
#17
Jungnam Lee, Ivan Arisi, Ermanno Puxeddu, Lazarus K Mramba, Massimo Amicosante, Carmen M Swaisgood, Marco Pallante, Mark L Brantly, C Magnus Sköld, Cesare Saltini
Idiopathic pulmonary fibrosis (IPF) is a chronic lung disease of unknown cause characterized by alveolar epithelial damage, patchy interstitial fibrosis and diffuse microvascular abnormalities. In IPF, alveolar clustering of iron-laden alveolar macrophages-a common sign of microhemorrhage, has been associated with vascular abnormalities and worsening of pulmonary hypertension. As iron-dependent ROS generation has been shown to induce unrestrained macrophage activation in disease models of vascular damage, we explored alveolar macrophage activation phenotype in IPF patients (n = 16) and healthy controls (CTR, n = 7) by RNA sequencing of bronchoalveolar lavage (BAL) cells...
2018: PloS One
https://www.readbyqxmd.com/read/29649066/macrophage-polarization-favors-epithelial-repair-during-acute-respiratory-distress-syndrome
#18
Marc Garnier, Aude Gibelin, Arnaud A Mailleux, Véronique Leçon, Margarita Hurtado-Nedelec, Jamila Laschet, Grégoire Trebbia, Mathilde Neuville, Sébastien Tanaka, Bruno Crestani, Monique Dehoux, Christophe Quesnel
OBJECTIVES: Alveolar macrophage polarization and role on alveolar repair during human acute respiratory distress syndrome remain unclear. This study aimed to determine during human acute respiratory distress syndrome: the alveolar macrophage polarization, the effect of alveolar environment on macrophage polarization, and the role of polarized macrophages on epithelial repair. DESIGN: Experimental ex vivo and in vitro investigations. SETTING: Four ICUs in three teaching hospitals...
April 11, 2018: Critical Care Medicine
https://www.readbyqxmd.com/read/29643245/recombinant-porcine-reproductive-and-respiratory-syndrome-virus-expressing-membrane-bound-il-15-as-immunomodulatory-adjuvant-enhances-nk-and-%C3%AE-%C3%AE-t-cell-responses-and-confers-heterologous-protection
#19
Qian M Cao, Yan-Yan Ni, Dianjun Cao, Debin Tian, Danielle M Yugo, C Lynn Heffron, Christopher Overend, Sakthivel Subramaniam, Adam J Rogers, Nicholas Catanzaro, Tanya LeRoith, Paul C Roberts, Xiang-Jin Meng
Cytokines are often used as adjuvants to improve vaccine immunogenicity, since they are important in initiating and shaping the immune response. The available commercial modified live-attenuated vaccines (MLVs) against porcine reproductive and respiratory syndrome virus (PRRSV) are unable to mount sufficient heterologous protection, as they typically induce weak innate and inadequate T cell responses. In this study, we investigated the immunogenicity and vaccine efficacy of recombinant PRRSV MLVs incorporated with porcine cytokine IL-15 or IL-18 gene fusing to a glycophosphatidylinositol (GPI) modification signal that can anchor the cytokines to cell membrane...
April 11, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29628759/the-development-of-azd7624-for-prevention-of-exacerbations-in-copd-a-randomized-controlled-trial
#20
Naimish R Patel, Danen M Cunoosamy, Malin Fagerås, Ziad Taib, Sara Asimus, Tove Hegelund-Myrbäck, Sofia Lundin, Katerina Pardali, Nisha Kurian, Eva Ersdal, Cecilia Kristensson, Katarina Korsback, Robert Palmér, Mary N Brown, Steven Greenaway, Leonard Siew, Graham W Clarke, Stephen I Rennard, Barry J Make, Robert A Wise, Paul Jansson
Background: p38 mitogen-activated protein kinase (MAPK) plays a central role in the regulation and activation of pro-inflammatory mediators. COPD patients have increased levels of activated p38 MAPK, which correlate with increased lung function impairment, alveolar wall inflammation, and COPD exacerbations. Objectives: These studies aimed to assess the effect of p38 inhibition with AZD7624 in healthy volunteers and patients with COPD. The principal hypothesis was that decreasing lung inflammation via inhibition of p38α would reduce exacerbations and improve quality of life for COPD patients at high risk for acute exacerbations...
2018: International Journal of Chronic Obstructive Pulmonary Disease
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