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Lung mechanics

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https://www.readbyqxmd.com/read/29334172/silica-nanoparticle-induced-cytokine-responses-in-beas-2b-and-hbec3-kt-cells-significance-of-particle-size-and-signalling-pathways-in-different-lung-cell-cultures
#1
Marit Låg, Tonje Skuland, Anna Godymchuk, Thu H T Nguyen, Hang L T Pham, Magne Refsnes
We have previously reported that silica nanoparticles (SiNPs) of nominal size 50 nm (Si50) induce the pro-inflammatory cytokines CXCL8 and IL-6 in BEAS-2B cells, via mechanisms involving MAPK p38, TACE-mediated TGFα release and the NFκB pathway. In the present study, we examined whether these findings are cell-specific or might be extended to another epithelial lung cell model, HBEC3-KT, and also to SiNPs of a smaller size (nominal size of 10 nm; Si10). The TEM average size of Si10 and Si50 was 10.9 nm and 34...
January 15, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29333921/targeting-brd4-proteins-suppresses-the-growth-of-nsclc-through-downregulation-of-eif4e-expression
#2
Zhongyuan Gao, Ting Yuan, Xiao Zhou, Ping Ni, Geng Sun, Ping Li, Zhixiang Cheng, Xuerong Wang
Lung cancer is the leading cause of cancer-related death worldwide. Bromodomain and extraterminal domain (BET) proteins act as epigenome readers for gene transcriptional regulation. Among BET family members, BRD4 was well studied, but for its mechanism in non-small cell lung carcinoma has not been elucidated. eIF4E regulates gene translation and has been proved to play an important role in the progression of lung cancer. In this study, we first confirmed that BET inhibitors JQ1 and I-BET151 suppressed the growth of NSCLCs, in parallel with downregulated eIF4E expression...
January 15, 2018: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/29333049/marine-derived-fungi-extracts-enhance-the-cytotoxic-activity-of-doxorubicin-in-nonsmall-cell-lung-cancer-cells-a459
#3
Bruno Castro-Carvalho, Alice A Ramos, Maria Prata-Sena, Fernanda Malhão, Márcia Moreira, Daniela Gargiulo, Tida Dethoup, Suradet Buttachon, Anake Kijjoa, Eduardo Rocha
Background: Drug resistance is a major concern in the current chemotherapeutic approaches and the combination with natural compounds may enhance the cytotoxic effects of the anticancer drugs. Therefore, this study evaluated the cytotoxicity of crude ethyl extracts of six marine-derived fungi - Neosartorya tsunodae KUFC 9213 (E1), Neosartorya laciniosa KUFC 7896 (E2), Neosartorya fischeri KUFC 6344 (E3), Aspergillus similanensis KUFA 0013 (E4), Neosartorya paulistensis KUFC 7894 (E5), and Talaromyces trachyspermum KUFC 0021 (E6) - when combined with doxorubicin (Dox), in seven human cancer cell lines...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332154/the-influence-of-systemically-or-locally-administered-mesenchymal-stem-cells-on-tissue-repair-in-a-rat-oral-implantation-model
#4
Miya Kanazawa, Ikiru Atsuta, Yasunori Ayukawa, Takayoshi Yamaza, Ryosuke Kondo, Yuri Matsuura, Kiyoshi Koyano
BACKGROUND: Multipotent mesenchymal stem cells (MSCs) are used clinically in regenerative medicine. Our previous report showed systemically injected MSCs improved peri-implant sealing and accelerated tissue healing. However, the risks of systemic MSC administration, including lung embolism, must be considered; therefore, their local application must be assessed for clinical safety and efficacy. We investigated differences in treatment effect between local and systemic MSC application using a rat oral implantation model...
January 13, 2018: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29331962/splicing-variant-of-wdfy4-augments-mda5-signalling-and-the-risk-of-clinically-amyopathic-dermatomyositis
#5
Yuta Kochi, Yoichiro Kamatani, Yuya Kondo, Akari Suzuki, Eiryo Kawakami, Ryosuke Hiwa, Yukihide Momozawa, Manabu Fujimoto, Masatoshi Jinnin, Yoshiya Tanaka, Takashi Kanda, Robert G Cooper, Hector Chinoy, Simon Rothwell, Janine A Lamb, Jiří Vencovský, Heřman Mann, Koichiro Ohmura, Keiko Myouzen, Kazuyoshi Ishigaki, Ran Nakashima, Yuji Hosono, Hiroto Tsuboi, Hidenaga Kawasumi, Yukiko Iwasaki, Hiroshi Kajiyama, Tetsuya Horita, Mariko Ogawa-Momohara, Akito Takamura, Shinichiro Tsunoda, Jun Shimizu, Keishi Fujio, Hirofumi Amano, Akio Mimori, Atsushi Kawakami, Hisanori Umehara, Tsutomu Takeuchi, Hajime Sano, Yoshinao Muro, Tatsuya Atsumi, Toshihide Mimura, Yasushi Kawaguchi, Tsuneyo Mimori, Atsushi Takahashi, Michiaki Kubo, Hitoshi Kohsaka, Takayuki Sumida, Kazuhiko Yamamoto
OBJECTIVES: Idiopathic inflammatory myopathies (IIMs) are a heterogeneous group of rare autoimmune diseases in which both genetic and environmental factors play important roles. To identify genetic factors of IIM including polymyositis, dermatomyositis (DM) and clinically amyopathic DM (CADM), we performed the first genome-wide association study for IIM in an Asian population. METHODS: We genotyped and tested 496 819 single nucleotide polymorphism for association using 576 patients with IIM and 6270 control subjects...
January 13, 2018: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/29331833/potential-factors-that-impact-the-radon-level-and-the-prediction-of-ambient-dose-equivalent-rates-of-indoor-microenvironments
#6
Mohamed Yasreen Mohamed Ali, Marlia M Hanafiah, Md Firoz Khan
This study aimed to measure the equilibrium equivalent radon (EECRn) concentration in an old building (Building-1) and a new building (Building-2) with mechanical ventilation and a natural ventilation system, respectively. Both buildings were located at the campus of University Kebangsaan Malaysia. The concentration of indoor radon was measured at 25 sampling stations using a radon detector model DOSEman PRO. The sampling was conducted for 8 h to represent daily working hours. A correlation of the radon concentration was made with the annual inhalation dose of the occupants at the indoor stations...
January 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29331617/asthma-predictive-index-in-relation-to-respiratory-mechanics-by-impulse-oscillometry-in-recurrent-wheezers
#7
T Arikoglu, S B Batmaz, D D Yildirim, Ö Tezol, G Bozlu, S Kuyucu
BACKGROUND: The identification of children who will have persistent asthma has become a focus of recent research. The aim of this study was to assess whether impulse oscillometry (IOS) has a diagnostic value to predict modified API (asthma predictive index) in pre-schoolers with recurrent wheezing. METHODS: Pre-school children aged 3-6 years with recurrent wheezing were enrolled. The study population was divided into two groups based on mAPI criteria. Lung function was assessed by IOS...
January 10, 2018: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29331583/importins-%C3%AE-and-%C3%AE-signaling-mediates-endothelial-cell-inflammation-and-barrier-disruption
#8
Antony Leonard, Arshad Rahman, Fabeha Fazal
Nucleocytoplasmic shuttling via importins is central to the function of eukaryotic cells and an integral part of the processes that lead to many human diseases. In this study, we addressed the role of α and β importins in the mechanism of endothelial cell (EC) inflammation and permeability, important pathogenic features of many inflammatory diseases such as acute lung injury and atherosclerosis. RNAi-mediated knockdown of importin α4 or α3 each inhibited NF-κB activation, proinflammatory gene (ICAM-1, VCAM-1, and IL-6) expression, and thereby endothelial adhesivity towards HL-60 cells, upon thrombin challenge...
January 10, 2018: Cellular Signalling
https://www.readbyqxmd.com/read/29331422/fept-cys-nanoparticles-induce-ros-dependent-cell-toxicity-and-enhance-chemo-radiation-sensitivity-of-nsclc-cells-in-vivo-and-in-vitro
#9
Yingming Sun, Hongtao Miao, Shijing Ma, Lei Zhang, Chengcheng You, Fang Tang, Cui Yang, Xiaoli Tian, Feng Wang, Yuan Luo, Xiangjie Lin, Hui Wang, Chunyang Li, Zhijun Li, Hongnv Yu, Xuefeng Liu, Yu Xiao, Yan Gong, Junhong Zhang, Hong Quan, Conghua Xie
FePt-Cys nanoparticles (FePt-Cys NPs) have been well used in many fields, despite their poor solubility and stability. We synthetized a cysteine surface modified FePt NPs, which exhibited good solubility, stability and biocompatibility. We explored the insight mechanisms of the antitumor effects of this new nanoparticle system in lung cancer cells. In the in vitro study, FePt-Cys NPs induced a reactive oxygen species (ROS) burst, which suppressed the antioxidant protein expression and induced cell apoptosis...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29331419/the-therapeutic-potential-of-human-adipose-derived-mesenchymal-stem-cells-producing-cxcl10-in-a-mouse-melanoma-lung-metastasis-model
#10
Hamed Mirzaei, Hossein Salehi, Reza Kazemi Oskuee, Ali Mohammadpour, Hamid Reza Mirzaei, Mohammad Reza Sharifi, Reza Salarinia, Hossein Yousofi Darani, Mojgan Mokhtari, Aria Masoudifar, Amirhossein Sahebkar, Rasoul Salehi, Mahmoud Reza Jaafari
Interferon γ-induced protein 10 kDa (IP-10) is a potent chemoattractant and has been suggested to enhance antitumor activity and mediate tumor regression through multiple mechanisms of action. Multiple lines of evidence have indicated that genetically-modified adult stem cells represent a potential source for cell-based cancer therapy. In the current study, we assessed therapeutic potential of human adipose derived mesenchymal stem cells (hADSC) genetically-modified to express IP-10 for the treatment of lung metastasis in an immunocompetent mouse model of metastatic melanoma...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29331337/elastin-in-lung-development-and-disease-pathogenesis
#11
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/29331088/significance-of-circulatory-dpp4-activity-in-metabolic-diseases
#12
REVIEW
Titli Nargis, Partha Chakrabarti
Dipeptidyl peptidase 4 (DPP4), also known as CD26 is a type II transmembrane protein that is released from the cell membrane in a nonclassical secretory mechanism. This exopeptidase selectively degrades varieties of substrates including incretin hormones, growth factors, and cytokines. A significant detectable amount of DPP4 activity can be measured in plasma as well as in different tissues such as intestinal epithelium, vascular endothelium, lymphocytes, monocytes, kidney, liver, adipose, lung, thymus, spleen, prostate, etc...
January 13, 2018: IUBMB Life
https://www.readbyqxmd.com/read/29330966/static-hyperinflation-is-associated-with-ventilatory-limitation-and-exercise-tolerance-in-adult-cystic-fibrosis
#13
Daniel Stevens
INTRODUCTION: Lung hyperinflation is a potential mechanism limiting exercise tolerance. However, available data on the impact of static hyperinflation on exercise performance in adult cystic fibrosis is lacking. Furthermore, the relative contribution of both static and dynamic hyperinflation to exercise performance is unknown. OBJECTIVES: To determine the impact of static hyperinflation on exercise tolerance and lung dynamics in adult cystic fibrosis. METHODS: Clinical data of 107 adult patients with cystic fibrosis, including pulmonary function, lung volumes, and cardiopulmonary exercise from the Toronto Cystic Fibrosis database were collected and analyzed...
January 13, 2018: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29330379/identification-of-shared-genetic-variants-between-schizophrenia-and-lung-cancer
#14
Verena Zuber, Erik G Jönsson, Oleksandr Frei, Aree Witoelar, Wesley K Thompson, Andrew J Schork, Francesco Bettella, Yunpeng Wang, Srdjan Djurovic, Olav B Smeland, Ingrid Dieset, Ayman H Fanous, Rahul S Desikan, Sébastien Küry, Stéphane Bézieau, Anders M Dale, Ian G Mills, Ole A Andreassen
Epidemiology studies suggest associations between schizophrenia and cancer. However, the underlying genetic mechanisms are not well understood, and difficult to identify from epidemiological data. We investigated if there is a shared genetic architecture between schizophrenia and cancer, with the aim to identify specific overlapping genetic loci. First, we performed genome-wide enrichment analysis and second, we analyzed specific loci jointly associated with schizophrenia and cancer by the conjunction false discovery rate...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330291/keap1-inhibits-metastatic-properties-of-nsclc-cells-by-stabilizing-architectures-of-f-actin-and-focal-adhesions
#15
Bo Wu, Shu Yang, Haimei Sun, Tingyi Sun, Fengqing Ji, Yurong Wang, Lie Xu, Deshan Zhou
Low expression of the tumor suppressor, Kelch-like ECH-associated protein 1 (KEAP1) in non-small cell lung cancer (NSCLC) often results in higher malignant biological behavior and poor prognosis; however, the underlying mechanism remains unclear. The present study demonstrates that overexpression of Keap1 significantly suppresses migration and invasion of three different lung cancer cells (A549, H460, and H1299). Highly-expressed Keap1, compared to the control, promotes formation of multiple stress fibers with larger mature focal adhesion complexes in the cytoplasm where only fine focal adhesions were observed in the membrane under control conditions...
January 12, 2018: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/29330144/kindlin-1-promotes-pulmonary-breast-cancer-metastasis
#16
Sana Sarvi, Hitesh Patel, Jun Li, Georgia L Dodd, Helen Creedon, Morwenna Muir, Jocelyn Ward, John C Dawson, Martin Lee, Jayne Culley, Donald M Salter, Andrew H Sims, Adam Byron, Valerie G Brunton
In breast cancer, increased expression of the cytoskeletal adaptor protein Kindlin-1 has been linked to increased risks of lung metastasis, but the functional basis is unknown. Here we show that in a mouse model of polyomavirus middle T antigen-induced mammary tumorigenesis, loss of Kindlin-1 reduced early pulmonary arrest and later development of lung metastasis. This phenotype relied on the ability of Kindlin-1 to bind and activate β integrin heterodimers. Kindlin-1 loss reduced α4 integrin-mediated adhesion of mammary tumor cells to the adhesion molecule VCAM-1 on endothelial cells...
January 12, 2018: Cancer Research
https://www.readbyqxmd.com/read/29330116/tnf-%C3%AE-increases-staphylococcus-aureus-induced-death-of-human-alveolar-epithelial-cell-line-a549-associated-with-rip3-mediated-necroptosis
#17
Shun-Hang Wen, Luo-Na Lin, Hu-Jun Wu, Lu Yu, Li Lin, Li-Li Zhu, Hai-Yan Li, Hai-Lin Zhang, Chang-Chong Li
AIM: To explore the role of tumor necrosis factor-alpha (TNF-α) on Staphylococcus aureus-induced necroptosis in alveolar epithelial cells. MAIN METHODS: The A549 alveolar epithelial cell line was pretreated with small interfering RNA (siRNA) against receptor interacting protein-3 (RIP3) and then stimulated by S. aureus, where some cells were pretreated with TNF-α or TNF-α with anti-TNF-α antibody simultaneously. A549 cell death was assessed using lactate dehydrogenase (LDH) leakage and flow cytometry analyses...
January 9, 2018: Life Sciences
https://www.readbyqxmd.com/read/29330055/tissue-geometry-may-govern-lung-branching-mode-selection
#18
Uduak Z George, Sharon R Lubkin
Lung branching morphogenesis proceeds in three stereotyped modes (domain, planar, and orthogonal branching). Much is known about the molecular players, including growth factors such as fibroblast growth factor 10 but it is unknown how these signals could actuate the different branching patterns. With the aim of identifying mechanisms that may determine the different branching modes, we developed a computational model of the epithelial lung bud and its surrounding mesenchyme. We studied transport of morphogens and localization of morphogen flux at lobe surfaces and lobe edges...
January 9, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29329563/pm2-5-induced-oxidative-stress-increases-intercellular-adhesion-molecule-1-expression-in-lung-epithelial-cells-through-the-il-6-akt-stat3-nf-%C3%AE%C2%BAb-dependent-pathway
#19
Chen-Wei Liu, Tzu-Lin Lee, Yu-Chen Chen, Chan-Jung Liang, Shu-Huei Wang, June-Horng Lue, Jaw-Shiun Tsai, Shih-Wei Lee, Shun-Hua Chen, Yi-Fan Yang, Tzu-Yi Chuang, Yuh-Lien Chen
BACKGROUND: Epidemiological studies have shown that ambient air pollution is closely associated with increased respiratory inflammation and decreased lung function. Particulate matters (PMs) are major components of air pollution that damages lung cells. However, the mechanisms remain to be elucidated. This study examines the effects of PMs on intercellular adhesion molecule-1 (ICAM-1) expression and the related mechanisms in vitro and in vivo. RESULT: The cytotoxicity, reactive oxygen species (ROS) generation, and monocyte adherence to A549 cells were more severely affected by treatment with O-PMs (organic solvent-extractable fraction of SRM1649b) than with W-PMs (water-soluble fraction of SRM1649b)...
January 12, 2018: Particle and Fibre Toxicology
https://www.readbyqxmd.com/read/29329427/ozone-induced-vascular-contractility-and-pulmonary-injury-are-differentially-impacted-by-diets-enriched-with-coconut-oil-fish-oil-and-olive-oil
#20
Samantha J Snow, Wan-Yun Cheng, Andres Henriquez, Myles Hodge, Virgina Bass, Gail M Nelson, Gleta Carswell, Judy E Richards, Mette C Schladweiler, Allen D Ledbetter, Brian Chorley, Kymberly M Gowdy, Haiyan Tong, Urmila P Kodavanti
Fish, olive, and coconut oil dietary supplementation have several cardioprotective benefits, but it is not established if they protect against air pollution-induced adverse effects. We hypothesized that these dietary supplements would attenuate ozone-induced systemic and pulmonary effects. Male Wistar Kyoto rats were fed either a normal diet, or a diet supplemented with fish, olive, or coconut oil for 8 weeks. Animals were then exposed to air or ozone (0.8 ppm), 4h/day for 2 days. Ozone exposure increased phenylephrine-induced aortic vasocontraction, which was completely abolished in rats fed the fish oil diet...
January 10, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
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