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https://www.readbyqxmd.com/read/28822739/experimental-characterization-and-model-identification-of-the-nonlinear-compressible-material-behavior-of-lung-parenchyma
#1
Anna M Birzle, Christian Martin, Lena Yoshihara, Stefan Uhlig, Wolfgang A Wall
The mechanical properties of lung parenchyma are essential both in lung function and biology; consequently, experimental methods are developed to describe the mechanical behavior of lung parenchyma. During breathing and mechanical ventilation, volume change is the physiologically dominating deformation mode of lung parenchyma; nevertheless, most studies examine lung tissue in mainly isochoric tension tests. In this paper, a novel experimental method for the quantification of the compressible material behavior at high volume changes of viable lung parenchyma is proposed...
August 5, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28822689/cholesterol-lowering-gene-therapy-counteracts-the-development-of-non-ischemic-cardiomyopathy-in-mice
#2
Ilayaraja Muthuramu, Ruhul Amin, Andrey Postnov, Mudit Mishra, Joseph Pierre Aboumsallem, Tom Dresselaers, Uwe Himmelreich, Paul P Van Veldhoven, Olivier Gheysens, Frank Jacobs, Bart De Geest
A causal role of hypercholesterolemia in non-ischemic heart failure has never been demonstrated. Adeno-associated viral serotype 8 (AAV8)-low-density lipoprotein receptor (AAV8-LDLr) gene transfer was performed in LDLr-deficient mice without and with pressure overload induced by transverse aortic constriction (TAC). AAV8-LDLr gene therapy resulted in an 82.8% (p < 0.0001) reduction of plasma cholesterol compared with controls. Mortality rate was lower (p < 0.05) in AAV8-LDLr TAC mice compared with control TAC mice (hazard ratio for mortality 0...
August 1, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28821630/il-17a-deficiency-mitigates-bleomycin-induced-complement-activation-during-lung-fibrosis
#3
Ellyse Cipolla, Amanda J Fisher, Hongmei Gu, Elizabeth A Mickler, Manisha Agarwal, Carol A Wilke, Kevin K Kim, Bethany B Moore, Ragini Vittal
Interleukin 17A (IL-17A) and complement (C') activation have each been implicated in the pathogenesis of idiopathic pulmonary fibrosis (IPF). We have reported that IL-17A induces epithelial injury via TGF-β in murine bronchiolitis obliterans; that TGF-β and the C' cascade present signaling interactions in mediating epithelial injury; and that the blockade of C' receptors mitigates lung fibrosis. In the present study, we investigated the role of IL-17A in regulating C' in lung fibrosis. Microarray analyses of mRNA isolated from primary normal human small airway epithelial cells indicated that IL-17A (100 ng/ml; 24 h; n = 5 donor lungs) induces C' components (C' factor B, C3, and GPCR kinase isoform 5), cytokines (IL8, -6, and -1B), and cytokine ligands (CXCL1, -2, -3, -5, -6, and -16)...
August 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28821451/5-ht7-receptor-antagonism-sb-269970-attenuates-bleomycin-induced-pulmonary-fibrosis-in-rats-via-downregulating-oxidative-burden-and-inflammatory-cascades-and-ameliorating-collagen-deposition-comparison-to-terguride
#4
Mona K Tawfik, Samy Makary
The neurotransmitter 5-hydroxytryptamine (5-HT) is involved in regulation of local tissue inflammation and repair through a set of receptors (5-HT1-7 receptors), which are expressed in the lung. Considering the protective importance of 5-HT receptor antagonists against development of pulmonary fibrosis, we evaluated whether 5-HT7 receptor antagonist (SB-269970) modulates lung inflammatory and fibrogenic processes in comparison with 5-HT2A/B receptor antagonist (terguride), in bleomycin (BLM)-induced idiopathic pulmonary fibrosis (IPF) model...
August 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28819672/folding-sticky-elastica-dynamics-and-reversibility-of-folds-in-langmuir-monolayers
#5
L C Foucard, J M Eaton, M Dennin, Alex J Levine
Lipid monolayers at the air/water interface are often subject to large mechanical stresses when compressed laterally. For large enough compression they fold in the out-of-plane direction to relax stress. The repetitive folding and unfolding of lung surfactant monolayers during breathing plays a critical role in conserving monolayer material at the air/water interface lining the lung. Although the mechanisms behind the folding have been explored recently, relatively little information exists regarding the implications of folding dynamics on the long-term stability of the monolayer...
August 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28819007/effects-of-antenatal-melatonin-therapy-on-lung-structure-in-growth-restricted-newborn-lambs
#6
Graeme R Polglase, Jade Barbuto, Beth J Allison, Tamara Yawno, Amy Elizabeth Sutherland, Atul Malhotra, Keith E Schulze, Euan M Wallace, Graham Jenkin, Sharon D Ricardo, Suzanne L Miller
BACKGROUND: Oxidative stress arising from suboptimal placental function contributes to a multitude of pathologies in infants compromised by fetal growth restriction (FGR). FGR infants are at high risk for respiratory dysfunction after birth and poor long-term lung function. OBJECTIVES: To investigate the contribution of oxidative stress to adverse lung development and the effects of melatonin administration, a powerful anti-oxidant, on lung structure in FGR lambs...
August 17, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28817164/prediction-of-acute-inhalation-toxicity-using-in-vitro-lung-surfactant-inhibition
#7
Jorid B Sørli, Yishi Huang, Emilie Da Silva, Jitka S Hansen, Yi Y Zuo, Marie Frederiksen, Asger W Nørgaard, Niels E Ebbehøj, Søren T Larsen, Karin S Hougaard
Private consumers and professionals may experience acute inhalation toxicity after inhaling aerosolized impregnation products. The distinction between toxic and non-toxic products is difficult to make for producers and product users alike, as there is no clearly described relationship between the chemical composition of the products and induction of toxicity. The currently accepted method for determination of acute inhalation toxicity is based on experiments on animals; it is time-consuming, expensive and causes stress for the animals...
August 17, 2017: ALTEX
https://www.readbyqxmd.com/read/28815017/autophagy-and-airway-fibrosis-is-there-a-link
#8
REVIEW
Anudeep Kota, Deepak Deshpande, Mehra Haghi, Brian Oliver, Pawan Sharma
In the past decade, an emerging process named "autophagy" has generated intense interest in many chronic lung diseases. Tissue remodeling and fibrosis is a common feature of many airway diseases, and current therapies do not prevent or reverse these structural changes. Autophagy has evolved as a conserved process for bulk degradation and recycling of cytoplasmic components to maintain basal cellular homeostasis and healthy organelle populations in the cell. Furthermore, autophagy serves as a cell survival mechanism and can also be induced by chemical and physical stress to the cell...
2017: F1000Research
https://www.readbyqxmd.com/read/28814849/tiotropium-bromide-exerts-anti-inflammatory-effects-during-resistive-breathing-an-experimental-model-of-severe-airway-obstruction
#9
Dimitrios Toumpanakis, Konstantinos Loverdos, Vassiliki Tzouda, Vyronia Vassilakopoulou, Eleni Litsiou, Christina Magkou, Vassiliki Karavana, Michael Pieper, Theodoros Vassilakopoulos
INTRODUCTION: Resistive breathing (RB), a hallmark of obstructive airway diseases, is characterized by strenuous contractions of the inspiratory muscles that impose increased mechanical stress on the lung. RB is shown to induce pulmonary inflammation in previous healthy animals. Tiotropium bromide, an anticholinergic bronchodilator, is also shown to exert anti-inflammatory effects. The effect of tiotropium on RB-induced pulmonary inflammation is unknown. METHODS: Adult rats were anesthetized, tracheostomized and breathed spontaneously through a two-way non-rebreathing valve...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28814833/markers-of-oxidative-nitrosative-stress-and-inflammation-in-lung-tissue-of-rats-exposed-to-different-intravenous-iron-compounds
#10
Jorge E Toblli, Gabriel Cao, Jorge F Giani, Fernando P Dominici, Margarita Angerosa
Iron deficiency anemia is a frequent complication in clinical conditions such as chronic kidney disease, chronic heart failure, inflammatory bowel disease, cancer, and excessive blood loss. Given the ability of iron to catalyze redox reactions, iron therapy can be associated with oxidative stress. The lung is uniquely susceptible to oxidative stress, and little is known about the effects of intravenous iron treatment in this organ. This study characterized changes in markers of oxidative/nitrosative stress and inflammation in the lung of non-iron deficient, non-anemic rats treated with five weekly doses (40 mg iron per kg body weight) of low molecular weight iron dextran (LMWID), iron sucrose (IS), ferric carboxymaltose (FCM), ferumoxytol (FMX), iron isomaltoside 1000 (IIM), or saline (control)...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28814807/psychological-impact-of-vehicle-exhaust-exposure-insights-from-an-animal-model
#11
Ankita Salvi, Gaurav Patki, Hesong Liu, Samina Salim
Air pollution resulting from exhaust emissions of vehicles has risen in the recent years, reportedly causing major adverse effects on the heart, lungs and the brain. Though respiratory and cardiovascular effects of these emissions are well identified, psychological and neurobiological complications of prolonged exposure to vehicle emissions remain unknown. Pro-oxidants are considered as major constituents of vehicle emissions. This is important considering causal link between oxidative stress and behavioral and cognitive impairments...
August 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28810518/ameliorative-effects-of-artemisia-pallens-in-a-murine-model-of-ovalbumin-induced-allergic-asthma-via-modulation-of-biochemical-perturbations
#12
Anwesha A Mukherjee, Amit D Kandhare, Supada R Rojatkar, Subhash L Bodhankar
INTRODUCTION: Asthma is a chronic, heterogeneous airway disorder characterized by airway inflammatory and remodeling. Artemisia pallens has been reported to possess antioxidant, anti-inflammatory and Anti-allergic potential. OBJECTIVE: To evaluate the anti-asthmatic effects of methanolic extract of Artemisia pallens (APME) against ovalbumin (OVA)-induced airway hyperresponsiveness (AHR) in rats. MATERIALS AND METHOD: AHR was induced in male Sprague-Dawley rats (180-200g) by intraperitoneal (i...
August 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28809781/ac2-26-an-annexin-a1-peptide-attenuates-ischemia-reperfusion-induced-acute-lung-injury
#13
Wen-I Liao, Shu-Yu Wu, Geng-Chin Wu, Hsin-Ping Pao, Shih-En Tang, Kun-Lun Huang, Shi-Jye Chu
Annexin A1 (AnxA1) is an endogenous protein that modulates anti-inflammatory processes, and its therapeutic potential has been reported in a range of inflammatory diseases. The effect of AnxA1 on ischemia-reperfusion (IR)-induced lung injury has not been examined. In this study, isolated, perfused rat lungs were subjected to IR lung injury induced by ischemia for 40 min, followed by reperfusion for 60 min. The rat lungs were randomly treated with vehicle (phosphate-buffered saline), and Ac2-26 (an active N-terminal peptide of AnxA1) with or without an N-formyl peptide receptor (FPR) antagonist N-Boc-Phe-Leu-Phe-Leu-Phe (Boc2)...
August 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28808311/antitumor-properties-of-coenzyme-q0-against-human-ovarian-carcinoma-cells-via-induction-of-ros-mediated-apoptosis-and-cytoprotective-autophagy
#14
You-Cheng Hseu, Tai-Jung Tsai, Mallikarjuna Korivi, Jer-Yuh Liu, Hui-Jye Chen, Chung-Ming Lin, Yi-Chun Shen, Hsin-Ling Yang
Coenzyme Q0 (CoQ0, 2,3-dimethoxy-5-methyl-1,4-benzoquinone) has been reported to exert anticancer properties against human breast/lung cancer cells. This study investigated the in vitro and in vivo anticancer properties of CoQ0 on human ovarian carcinoma (SKOV-3) cells and xenografted nude mice, and revealed the underlying molecular mechanism. CoQ0 induced G2/M arrest through downregulation of cyclin B1/A and CDK1/K2 expressions. CoQ0-induced autophagy as a survival mechanism was evidenced by increased accumulation of LC3-II, GFP-LC3 puncta, AVOs formation and Beclin-1/Bcl-2 dysregulation...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808300/pterostilbene-exerts-anticancer-activity-on-non-small-cell-lung-cancer-via-activating-endoplasmic-reticulum-stress
#15
Zhiqiang Ma, Yang Yang, Shouyin Di, Xiao Feng, Dong Liu, Shuai Jiang, Wei Hu, Zhigang Qin, Yue Li, Jianjun Lv, Chongxi Fan, Xiaolong Yan, Xiaofei Li
Pterostilbene (PT), the natural dimethylated analog of resveratrol (RSV), is a potent anticarcinogen for non-small-cell lung cancer (NSCLC), but its anti-NSCLC mechanisms remain unclear. In this study, we show that PT treatment time- and dose-dependently enhanced the endoplasmic reticulum stress (ERS) signaling (i.e., p-PERK, IRE1, ATF4, CHOP), thus decreasing the cell viability and inducing apoptosis in human PC9 and A549 NSCLC cell lines. Moreover, the decreased migratory and adhesive abilities, downregulation of intracellular glutathione (GSH) level, enhanced reactive oxygen species (ROS) generation, Caspase 3 activity and mitochondrial membrane depolarization were observed in NSCLC cells treated with PT...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807675/substantial-protection-against-mptp-associated-parkinson-s-neurotoxicity-in-vitro-and-in-vivo-by-anti-cancer-agent-su4312-via-activation-of-mef2d-and-inhibition-of-mao-b
#16
Baojian Guo, Shengquan Hu, Chengyou Zheng, Hongyu Wang, Fangcheng Luo, Haitao Li, Wei Cui, Xifei Yang, Guozhen Cui, Shinghung Mak, Tony Chung-Lit Choi, Edmond Dik-Lung Ma, Yuqiang Wang, Simon Ming Yuen Lee, Zaijun Zhang, Yifan Han
We have previously demonstrated the unexpected neuroprotection of the anti-cancer agent SU4312 in cellular models associated with Parkinson's disease (PD). However, the precise mechanisms underlying its neuroprotection are still unknown, and the effects of SU4312 on rodent models of PD have not been characterized. In the current study, we found that the protection of SU4312 against 1-methyl-4-phenylpyridinium ion (MPP(+))-induced neurotoxicity in PC12 cells was achieved through the activation of transcription factor myocyte enhancer factor 2D (MEF2D), as evidenced by the fact that SU4312 stimulated myocyte enhancer factor 2 (MEF2) transcriptional activity and prevented the inhibition of MEF2D protein expression caused by MPP(+), and that short hairpin RNA (ShRNA)-mediated knockdown of MEF2D significantly abolished the neuroprotection of SU4312...
August 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28807355/hydrogen-rich-pure-water-prevents-cigarette-smoke-induced-pulmonary-emphysema-in-smp30-knockout-mice
#17
Yohei Suzuki, Tadashi Sato, Masataka Sugimoto, Hario Baskoro, Keiko Karasutani, Aki Mitsui, Fariz Nurwidya, Naoko Arano, Yuzo Kodama, Shin-Ichi Hirano, Akihito Ishigami, Kuniaki Seyama, Kazuhisa Takahashi
Chronic obstructive pulmonary disease (COPD) is predominantly a cigarette smoke (CS)-triggered disease with features of chronic systemic inflammation. Oxidants derived from CS can induce DNA damage and stress-induced premature cellular senescence in the respiratory system, which play significant roles in COPD. Therefore, antioxidants should provide benefits for the treatment of COPD; however, their therapeutic potential remains limited owing to the complexity of this disease. Recently, molecular hydrogen (H2) has been reported as a preventive and therapeutic antioxidant...
August 11, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28807219/effects-of-p38-mitogen-activated-protein-kinase-on-lung-ischemia-reperfusion-injury-in-diabetic-rats
#18
Linlin Song, Di Li, Juan Wang, Chao Meng, Xiaoguang Cui
BACKGROUND: Lung ischemia-reperfusion injury (LIRI) is a pathologic process that is observed in several clinical conditions, and p38 mitogen-activated protein kinase (MAPK) is involved. Diabetes mellitus (DM) results in an increased incidence of ischemia-induced organ damage. The aims of this study were to examine the effects of DM on LIRI in a rat model of DM and to explore the possible mechanisms in relation to the p38 MAPK pathway. METHODS: Forty rats were randomly divided into the following five groups (n = 8 each): a control + sham group, a control + IR group (CIR), a DM + sham group, a DM + IR group (DIR), and a DM + IR + SB203580 group...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28807216/early-resuscitation-with-exendin-4-alleviates-acute-lung-injury-after-hemorrhagic-shock-in-rats
#19
Xiang Song, Gan Chen, Xin Luo, Guoxing You, Yujing Yin, Ying Wang, Lian Zhao, Hong Zhou
BACKGROUND: Oxidative stress induced by hemorrhagic shock (HS) is known to initiate a systemic inflammatory response, which leads to subsequent acute lung injury. This study is aimed to assess the efficacy of exendin-4 (Ex-4) in attenuating lung injury in a rat model of HS and resuscitation (HS/R). METHODS: HS was induced in sodium pentobarbital-anesthetized adult male Wistar rats by withdrawing blood to maintain a mean arterial pressure of 30-35 mm Hg for 50 min...
August 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28805696/licochalcone-a-inhibits-the-proliferation-of-human-lung-cancer-cell-lines-a549-and-h460-by-inducing-g2-m-cell-cycle-arrest-and-er-stress
#20
Chenyu Qiu, Tingting Zhang, Wenxin Zhang, Lina Zhou, Bin Yu, Wei Wang, Zhihong Yang, Zhiguo Liu, Peng Zou, Guang Liang
Licochalcone A (LicA), a flavonoid isolated from the famous Chinese medicinal herb Glycyrrhiza uralensis Fisch, has wide spectrum of pharmacological activities. In this study, the anti-cancer effects and potential mechanisms of LicA in non-small cell lung cancer (NSCLC) cells were studied. LicA decreased cell viability and induced apoptosis in a dose-dependent manner in NSCLC cells. LicA inhibited lung cancer cells growth by blocking cell cycle progression at the G2/M transition and inducing apoptosis. LicA treatment decreased the expression of MDM2, Cyclin B1, Cdc2 and Cdc25C in H460 and A549 cancer cell lines...
August 12, 2017: International Journal of Molecular Sciences
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