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Mouse emphysema

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https://www.readbyqxmd.com/read/28186975/amp-activated-protein-kinase-reduces-inflammatory-responses-and-cellular-senescence-in-pulmonary-emphysema
#1
Xiao-Yu Cheng, Yang-Yang Li, Cheng Huang, Jun Li, Hong-Wei Yao
Current drug therapy fails to reduce lung destruction of chronic obstructive pulmonary disease (COPD). AMP-activated protein kinase (AMPK) has emerged as an important integrator of signals that control energy balance and lipid metabolism. However, there are no studies regarding the role of AMPK in reducing inflammatory responses and cellular senescence during the development of emphysema. Therefore, we hypothesize that AMPK reduces inflammatroy responses, senescence, and lung injury. To test this hypothesis, human bronchial epithelial cells (BEAS-2B) and small airway epithelial cells (SAECs) were treated with cigarette smoke extract (CSE) in the presence of a specific AMPK activator (AICAR, 1 mM) and inhibitor (Compound C, 5 μM)...
February 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28183199/recombinant-human-keratinocyte-growth-factor-attenuates-apoptosis-in-elastase-induced-emphysematous-mice-lungs
#2
Sudhir Kotnala, Sumit Baghel, Deepali Verma, Amit Tyagi, Jai Prakash Muyal
Alveolar cell apoptosis is one of the potential factors involved in the pathogenesis of emphysema. Recently, exogenous recombinant human keratinocyte growth factor (rHuKGF) has been reported to induce the regeneration of gas exchange structures. Therefore, the rationale of the present study was to investigate the potential effect of rHuKGF in ameliorating tissue destruction in the emphysematous mice lungs. Four experimental groups (i.e. control-, emphysema-, therapy- and therapy control-group) were prepared...
January 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/28164246/immune-mediated-inflammation-in-the-pathogenesis-of-emphysema-insights-from-mouse-models
#3
REVIEW
John M Craig, Alan L Scott, Wayne Mitzner
The cellular mechanisms that result in the initiation and progression of emphysema are clearly complex. A growing body of human data combined with discoveries from mouse models utilizing cigarette smoke exposure or protease administration have improved our understanding of emphysema development by implicating specific cell types that may be important for the pathophysiology of chronic obstructive pulmonary disease. The most important aspects of emphysematous damage appear to be oxidative or protease stress and sustained macrophage activation and infiltration of other immune cells leading to epithelial damage and cell death...
February 6, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28154254/effects-of-simvastatin-on-alveolar-regeneration-and-its-relationship-to-exposure-in-mice-with-dexamethasone-induced-emphysema
#4
Shihomi Hirooka, Misaki Ueno, Satoko Fukuda, Atsushi Miyajima, Takashi Hirota
In the present study, the relationship between systemic exposure of simvastatin (SV) hydroxy acid (SV-acid), an active form of SV, and its alveolar regeneration rates was investigated using emphysema model mice created by postnatal treatment of dexamethasone. In a model with young animals, the mice were treated with SV for 10 d from postnatal day 42. Similar alveolar regeneration with a % mean linear intercept (Lm) recovery of 60 to 70% by histochemical observation was observed in mice after intraperitoneal administration at dose in the range of 4-100 µg/mouse...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28070015/inhaled-resveratrol-treatments-slow-ageing-related-degenerative-changes-in-mouse-lung
#5
Barbara Driscoll, Sonia Navarro, Raghava Reddy, Jooeun Lee, David Warburton
BACKGROUND: Lung ageing, a significant risk factor for chronic human lung diseases such as COPD and emphysema, is characterised by airspace enlargement and decreasing lung function. Likewise, in prematurely ageing telomerase null (terc-/-) mice, p53 stabilisation within diminishing numbers of alveolar epithelial type 2 cells (AEC2) accompanies reduced lung function. Resveratrol (RSL) is a plant phytoalexin that has previously showed efficacy in enhancing invertebrate longevity and supporting mammalian muscle metabolism when delivered orally...
January 9, 2017: Thorax
https://www.readbyqxmd.com/read/28064485/astragalin-inhibits-allergic-inflammation-and-airway-thickening-in-ovalbumin-challenged-mice
#6
Yun-Ho Kim, Yean-Jung Choi, Min-Kyung Kang, Sin-Hye Park, Lucia Dwi Antika, Eun-Jung Lee, Dong Yeon Kim, Young-Hee Kang
Lung inflammation and oxidative stress are the major contributors to the development of obstructive pulmonary diseases. Macrophages are involved in pulmonary inflammation and alveolar damage in emphysema. Astragalin is an anti-inflammatory flavonoid present in persimmon leaves and green tea seeds. This study elucidated that astragalin inhibited inflammatory cell infiltration induced by 20 μM H2O2 and blocked airway thickening and alveolar emphysema induced by 20 μg of ovalbumin (OVA) in mice. OVA induced mouse pulmonary MCP-1, and H2O2 enhanced the expression of MCP-1/ICAM-1/αv integrin in bronchial airway epithelial BEAS-2B cells...
February 1, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28056498/bone-marrow-stem-cell-therapy-partially-ameliorates-pathological-consequences-in-livers-of-mice-expressing-mutant-human-%C3%AE-1-antitrypsin
#7
Prakash Baligar, Veena Kochat, Shailendra K Arindkar, Zaffar Equbal, Snehashish Mukherjee, Swati Patel, Perumal Nagarajan, Sujata Mohanty, Jeffrey H Teckman, Asok Mukhopadhyay
: Alpha1-antitrypsin deficiency (AATD) is a genetic disease, caused by mutation of the AAT gene. Accumulation of mutated AAT protein aggregates in hepatocytes leads to endoplasmic reticulum (ER) stress resulting in impairment of liver functions and in some cases hepatocellular carcinoma, whereas decline of AAT levels in sera is responsible for pulmonary emphysema. In critical cases of liver ailments, the only option for treatment is liver transplantation, whereas AAT replacement therapy is followed in case of emphysema...
January 5, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28034695/aberrant-lung-remodeling-in-a-mouse-model-of-surfactant-dysregulation-induced-by-modulation-of-the-abca3-gene
#8
Michael F Beers, Lars Knudsen, Yaniv Tomer, Julian Maronn, Ming Zhao, Matthias Ochs, Surafel Mulugeta
The lipid transporter, ATP binding cassette class A3 (ABCA3), plays a critical role in the biogenesis of alveolar type 2 (AT2) cell lamellar bodies (LBs). A relatively large number of mutations in the ABCA3 gene have been identified in association with diffuse parenchymal lung disease (DPLD), the most common of which is a missense mutation (valine substitution for lysine at residue 292 (ABCA3(E292V))) that leads to functional impairment of the transporter in vitro. The consequences of ABCA3(E292)(V) gene expression in vivo are unknown...
December 26, 2016: Annals of Anatomy, Anatomischer Anzeiger: Official Organ of the Anatomische Gesellschaft
https://www.readbyqxmd.com/read/28005423/cellular-senescence-and-lung-function-during-aging-yin-and-yang
#9
Judith Campisi
Cellular senescence is a cell fate decision and stress response that entails a permanent arrest of cell proliferation coupled to a complex secretory phenotype. Senescent cells increase in number with age in most, if not all, mammalian tissues, including the airways and lungs. They also increase at greater than expected numbers, compared with age-matched controls, at sites of age-related pathologies such as chronic obstructive pulmonary disorder and emphysema. The senescence response is a double-edged sword...
December 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27994590/cigarette-smoke-induction-of-interleukin-27-wsx-1-regulates-the-differentiation-of-th1-and-th17-cells-in-a-smoking-mouse-model-of-emphysema
#10
Shi-Lin Qiu, Min-Chao Duan, Yi Liang, Hai-Juan Tang, Guang-Nan Liu, Liang-Ming Zhang, Chao-Mian Yang
IFN-γ-producing CD4(+) T (Th1) cells and IL-17-producing CD4(+) T (Th17) cells play a critical role in the pathogenesis of chronic obstructive pulmonary disease (COPD). However, the immune regulation between Th1 and Th17 cells remains unclear. Previous studies have demonstrated that interleukin-27 (IL-27)/WSX-1 exerted pro- or anti-inflammatory effects in many acute inflammatory diseases by modulating T cell-mediated immune response, but little was known about its role in chronic inflammatory disease, especially in smoking-related lung diseases...
2016: Frontiers in Immunology
https://www.readbyqxmd.com/read/27982104/pharmacological-and-genetic-reappraisals-of-protease-and-oxidative-stress-pathways-in-a-mouse-model-of-obstructive-lung-diseases
#11
Tsuyoshi Shuto, Shunsuke Kamei, Hirofumi Nohara, Haruka Fujikawa, Yukihiro Tasaki, Takuya Sugahara, Tomomi Ono, Chizuru Matsumoto, Yuki Sakaguchi, Kasumi Maruta, Ryunosuke Nakashima, Taisei Kawakami, Mary Ann Suico, Yoshitaka Kondo, Akihito Ishigami, Toru Takeo, Ken-Ichiro Tanaka, Hiroshi Watanabe, Naomi Nakagata, Kohei Uchimura, Kenichiro Kitamura, Jian-Dong Li, Hirofumi Kai
Protease-antiprotease imbalance and oxidative stress are considered to be major pathophysiological hallmarks of severe obstructive lung diseases including chronic obstructive pulmonary disease (COPD) and cystic fibrosis (CF), but limited information is available on their direct roles in the regulation of pulmonary phenotypes. Here, we utilized βENaC-transgenic (Tg) mice, the previously established mouse model of severe obstructive lung diseases, to produce lower-mortality but pathophysiologically highly useful mouse model by backcrossing the original line with C57/BL6J mice...
December 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27958376/high-resolution-short-exposure-small-animal-laboratory-x-ray-phase-contrast-tomography
#12
Daniel H Larsson, William Vågberg, Andre Yaroshenko, Ali Önder Yildirim, Hans M Hertz
X-ray computed tomography of small animals and their organs is an essential tool in basic and preclinical biomedical research. In both phase-contrast and absorption tomography high spatial resolution and short exposure times are of key importance. However, the observable spatial resolutions and achievable exposure times are presently limited by system parameters rather than more fundamental constraints like, e.g., dose. Here we demonstrate laboratory tomography with few-ten μm spatial resolution and few-minute exposure time at an acceptable dose for small-animal imaging, both with absorption contrast and phase contrast...
December 13, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27956365/raman-microspectroscopy-as-a-diagnostic-tool-for-the-non-invasive-analysis-of-fibrillin-1-deficiency-in-the-skin-and-in-the-in-vitro-skin-models
#13
Eva Brauchle, Hannah Bauer, Patrick Fernes, Alexandra Zuk, Katja Schenke-Layland, Gerhard Sengle
: Fibrillin microfibrils and elastic fibers are critical determinants of elastic tissues where they define as tissue-specific architectures vital mechanical properties such as pliability and elastic recoil. Fibrillin microfibrils also facilitate elastic fiber formation and support the association of epithelial cells with the interstitial matrix. Mutations in fibrillin-1 (FBN1) are causative for the Marfan syndrome, a congenital multisystem disorder characterized by progressive deterioration of the fibrillin microfibril/ elastic fiber architecture in the cardiovascular, musculoskeletal, ocular, and dermal system...
December 9, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27774071/characterization-of-a-mouse-model-of-emphysema-induced-by-multiple-instillations-of-low-dose-elastase
#14
Milena V Oliveira, Soraia C Abreu, Gisele A Padilha, Nazareth N Rocha, Lígia A Maia, Christina M Takiya, Debora G Xisto, Bela Suki, Pedro L Silva, Patricia R M Rocco
Many experimental models have been proposed to study the pathophysiological features of emphysema, as well as to search for new therapeutic approaches for acute or chronically injured lung parenchyma. We aimed to characterize an emphysema model induced by multiple instillations of elastase by tracking changes in inflammation, remodeling, and cardiac function after each instillation. Forty-eight C57BL/6 mice were randomly assigned across two groups. Emphysema (ELA) animals received 1, 2, 3, or 4 intratracheal instillations of pancreatic porcine elastase (PPE, 0...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27765950/therapeutic-effects-of-adipose-derived-stem-cells-pretreated-with-pioglitazone-in-an-emphysema-mouse-model
#15
Yoonki Hong, You-Sun Kim, Seok-Ho Hong, Yeon-Mok Oh
There is no therapy currently available that influences the natural history of disease progression in patients with chronic obstructive pulmonary disease (COPD). Although stem cell therapy is considered a potential therapeutic option in COPD, there are no clinical trials proving definitive therapeutic effects in patients with COPD. Recently, it was reported that pioglitazone might potentiate the therapeutic effects of stem cells in patients with heart or liver disease. To test the capacity of pioglitazone pretreatment of stem cells for emphysema repair, we evaluated the therapeutic effects of pioglitazone-pretreated human adipose-derived mesenchymal stem cells (ASCs) on elastase-induced or cigarette smoke-induced emphysema in mice...
October 21, 2016: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/27756443/human-adipose-derived-mesenchymal-stem-cell-spheroids-improve-recovery-in-a-mouse-model-of-elastase-induced-emphysema
#16
RyeonJin Cho, You-Sun Kim, Ji-Young Kim, Yeon-Mok Oh
BACKGROUND/PURPOSE: Emphysema, a pathologic component of chronic obstructive pulmonary disease, causes irreversible destruction. Many researchers have reported that mesenchymal stem cells can regenerate lung tissue after emphysema. METHODS: We evaluated if spheroid human adipose-derived mesenchymal stem cells (ASCs) showed greater regenerative effects than dissociated ASCs in elastase-induced emphysema mice. ASCs were administered via an intrapleural route. RESULTS: Mice injected with spheroid ASCs showed improved regeneration of lung tissue, increased expression of growth factors such as FGF2 and HGF, and a reduction in proteases with an induction of protease inhibitors when compared with mice injected with dissociated ASCs...
October 19, 2016: BMB Reports
https://www.readbyqxmd.com/read/27666688/-bone-turnover-and-bone-structure-in-clinical-animal-models-of-copd
#17
REVIEW
Mamoru Sasaki, Shotaro Chubachi
The features of chronic obstructive pulmonary disease(COPD)are chronic inflammatory and emphysema changes in the lungs by long-term cigarette smoke(CS)exposure. Osteoporosis is an important systemic comorbidity of COPD. Severe emphysema and low body mass index(BMI)are independent risk factors for low bone mineral density in COPD patients. However the pathophysiologic mechanisms underlying emphysema and osteoporosis have not been fully elucidated. An established mouse model of CS-induced emphysema with decrease body weight and bone mineral density is important for investigating the cause of osteoporosis in COPD patients...
2016: Clinical Calcium
https://www.readbyqxmd.com/read/27644555/lung-regeneration-by-fetal-lung-tissue-implantation-in-a-mouse-pulmonary-emphysema-model
#18
Koh Uyama, Shoji Sakiyama, Mitsuteru Yoshida, Koichiro Kenzaki, Hiroaki Toba, Yukikiyo Kawakami, Kazumasa Okumura, Hiromitsu Takizawa, Kazuya Kondo, Akira Tangoku
The mortality and morbidity of chronic obstructive pulmonary disease are high. However, no radical therapy has been developed to date. The purpose of this study was to evaluate whether fetal mouse lung tissue can grow and differentiate in the emphysematous lung. Fetal lung tissue from green fluorescent protein C57BL/6 mice at 16 days' gestation was used as donor material. Twelve-month-old pallid mice were used as recipients. Donor lungs were cut into small pieces and implanted into the recipient left lung by performing thoracotomy under anesthesia...
2016: Journal of Medical Investigation: JMI
https://www.readbyqxmd.com/read/27601084/a-new-autosomal-dominant-eye-and-lung-syndrome-linked-to-mutations-in-timp3-gene
#19
Isabelle Meunier, Béatrice Bocquet, Gilles Labesse, Christina Zeitz, Sabine Defoort-Dhellemmes, Annie Lacroux, Martine Mauget-Faysse, Isabelle Drumare, Anne-Sophie Gamez, Cyril Mathieu, Virginie Marquette, Lola Sagot, Claire-Marie Dhaenens, Carl Arndt, Patrick Carroll, Martine Remy-Jardin, Salomon Yves Cohen, José-Alain Sahel, Bernard Puech, Isabelle Audo, Sarah Mrejen, Christian P Hamel
To revisit the autosomal dominant Sorsby fundus dystrophy (SFD) as a syndromic condition including late-onset pulmonary disease. We report clinical and imaging data of ten affected individuals from 2 unrelated families with SFD and carrying heterozygous TIMP3 mutations (c.572A > G, p.Y191C, exon 5, in family 1 and c.113C > G, p.S38C, exon 1, in family 2). In family 1, all SFD patients older than 50 (two generations) had also a severe emphysema, despite no history of smoking or asthma. In the preceding generation, the mother died of pulmonary emphysema and she was blind after the age of 50...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27599597/eucalyptol-attenuates-cigarette-smoke-induced-acute-lung-inflammation-and-oxidative-stress-in-the-mouse
#20
Emanuel Kennedy-Feitosa, Renata Tiemi Okuro, Vanessa Pinho Ribeiro, Manuella Lanzetti, Marina Valente Barroso, Walter Araújo Zin, Luís Cristóvão Porto, Lycia Brito-Gittirana, Samuel Santos Valenca
Short-term cigarette smoke (CS) exposure does not cause emphysema; however, some pathogenesis hallmarks are maintained, such as oxidative stress and inflammation. This study aimed to test the efficacy of eucalyptol against short-term CS exposure in mice. C57BL/6 mice were exposed to 12 cigarettes per day for 5 days (CS group). The control group was exposed to sham smoking. Three groups of mice exposed to CS were treated to different concentrations of eucalyptol (1, 3, 10 mg/mL) via inhalation (15 min/daily) for 5 days (CS + 1 mg, CS+3 mg and CS+10 mg groups)...
September 3, 2016: Pulmonary Pharmacology & Therapeutics
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