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https://www.readbyqxmd.com/read/29209776/hyperoxia-induced-cardiotoxicity-and-ventricular-remodeling-in-type-ii-diabetes-mice
#1
Jennifer Leigh Rodgers, Eva Samal, Subhra Mohapatra, Siva Kumar Panguluri
Hyperoxia, or supplemental oxygen, is regularly used in the clinical setting for critically ill patients in ICU. However, several recent studies have demonstrated the negative impact of this treatment in patients in critical care, including increased rates of lung and cardiac injury, as well as increased mortality. The purpose of this study was to determine the predisposition for arrhythmias and electrical remodeling in a type 2 diabetic mouse model (db/db), as a result of hyperoxia treatment. For this, db/db and their heterozygous controls were treated with hyperoxia (> 90% oxygen) or normoxia (normal air) for 72-h...
December 5, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/29201194/protective-effect-of-zoledronic-acid-on-articular-cartilage-and-subchondral-bone-of-rabbits-with-experimental-knee-osteoarthritis
#2
Guorong She, Ziqi Zhou, Zhengang Zha, Fei Wang, Xiaoting Pan
Subchondral bone reabsorption and remodeling are responsible for the initiation and progression of osteoarthritis (OA). Zoledronic acid (ZOL), a third-generation bisphosphonate (BIS), is an inhibitor of bone reabsorption. However, the intervention effect of ZOL on OA has not been fully characterized and remains to be directly demonstrated in animal experiments. The present study examined the microscopic and macroscopic changes in the anterior cruciate ligament transection (ACLT) model of OA in rabbits and evaluated the effects of ZOL on cartilage degeneration and subchondral bone loss...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29193065/stereological-assessment-of-the-blood-air-barrier-and-the-surfactant-system-after-mesenchymal-stem-cell-pretreatment-in-a-porcine-non-heart-beating-donor-model-for-lung-transplantation
#3
Anke Schnapper, Astrid Christmann, Lars Knudsen, Parwis Rahmanian, Yeong-Hoon Choi, Mohamed Zeriouh, Samira Karavidic, Klaus Neef, Anja Sterner-Kock, Maria Guschlbauer, Florian Hofmaier, Alexandra C Maul, Thorsten Wittwer, Thorsten Wahlers, Christian Mühlfeld, Matthias Ochs
More frequent utilization of non-heart-beating donor (NHBD) organs for lung transplantation has the potential to relieve the shortage of donor organs. In particular with respect to uncontrolled NHBD, concerns exist regarding the risk of ischaemia/reperfusion (IR) injury-related graft damage or dysfunction. Due to their immunomodulating and tissue-remodelling properties, bone-marrow-derived mesenchymal stem cells (MSCs) have been suspected of playing a beneficial role regarding short- and long-term survival and function of the allograft...
November 28, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29155483/modelling-persistent-mycoplasma-pneumoniae-infection-of-human-airway-epithelium
#4
Oliver A Prince, Thomas M Krunkosky, Edward S Sheppard, Duncan C Krause
Mycoplasma pneumoniae is a human respiratory tract pathogen causing acute and chronic airway disease states that can include long-term carriage and extrapulmonary spread. The mechanisms of persistence and migration beyond the conducting airways, however, remain poorly understood. We previously described an acute exposure model using normal human bronchial epithelium (NHBE) in air-liquid interface culture, showing that M. pneumoniae gliding motility is essential for initial colonisation and subsequent spread, including localisation to epithelial cell junctions...
November 20, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/29137886/diesel-exhaust-inhalation-exposure-induces-pulmonary-arterial-hypertension-in-mice
#5
Jing Liu, Xiaoqing Ye, Dapeng Ji, Xiaofei Zhou, Cong Qiu, Weiping Liu, Luyang Yu
Diesel exhaust (DE) is one of the main sources of urban air pollution. An increasing number of evidence showed the association of air pollution with cardiovascular diseases. Pulmonary arterial hypertension (PAH) is one of the most disastrous vascular diseases, which results in right ventricular failure and death. However, the relationship of DE inhalation exposure with PAH is still unknown. In this study, male adult mice were exposed by inhalation to filtered ambient air (negative control), 10% O2 hypoxia (PAH-phenotype positive control), 350 μg/m(3) particulate matter whole DE, or the combination of DE and hypoxic condition...
November 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29109948/hemodynamic-and-pathologic-characterization-of-the-task-1-mouse-does-not-demonstrate-pulmonary-hypertension
#6
Melanie G Kitagawa, Julia O Reynolds, Xander H T Wehrens, Robert M Bryan, Lavannya M Pandit
Introduction: Pulmonary hypertension (PH) carries significant associated morbidity and mortality and the underlying molecular mechanisms of PH are not well understood. Loss-of-function mutations in TASK-1 potassium channels are associated with PH in humans. Although TASK-1 has been considered in the development of PH for over a decade, characterization of TASK-1 knockout mice has been limited to in vitro studies or in vivo studies in room air at isolated time points. The purpose of this study was twofold...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/29067108/effects-of-fhl1-and-p21-on-hypoxia-induced-pulmonary-vascular-remodeling-in-neonatal-rats
#7
Yanna Du, Jianhua Fu, Li Yao, Dan Zhang, Na Liu, Xindong Xue
Numerous studies have demonstrated that altered expression levels of four and a half LIM domains 1 (FHL1) and P21 are necessary for hypoxia-induced pulmonary vascular remodeling in both adult rats and human patients with idiopathic pulmonary arterial hypertension. However, whether FHL1 and P21 are present in the pulmonary artery and whether these proteins affect pulmonary vascular remodeling in hypoxia-induced pulmonary hypertension (HPH) in neonatal rats remain unknown. The present study investigated the effects of altered FHL1 and P21 expression on pulmonary vascular remodeling in neonatal rats with HPH...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29035757/pulmonary-hypertension-associated-with-bronchopulmonary-dysplasia-in-preterm-infants
#8
REVIEW
Christine B Bui, Merrin A Pang, Arvind Sehgal, Christiane Theda, Jason C Lao, Philip J Berger, Marcel F Nold, Claudia A Nold-Petry
Bronchopulmonary dysplasia (BPD) and BPD-associated pulmonary hypertension (BPD-PH) are chronic inflammatory cardiopulmonary diseases with devastating short- and long-term consequences for infants born prematurely. The immature lungs of preterm infants are ill-prepared to achieve sufficient gas exchange, thus usually necessitating immediate commencement of respiratory support and oxygen supplementation. These therapies are life-saving, but they exacerbate the tissue damage that is inevitably inflicted on a preterm lung forced to perform gas exchange...
November 2017: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/28863189/opposing-effects-of-in-vitro-differentiated-macrophages-sub-type-on-epithelial-wound-healing
#9
Julia A Gindele, Samuel Mang, Nicolas Pairet, Ingrid Christ, Florian Gantner, Jürgen Schymeinsky, David J Lamb
Inappropriate repair responses to pulmonary epithelial injury have been linked to perturbation of epithelial barrier function and airway remodelling in a number of respiratory diseases, including chronic obstructive pulmonary disease and idiopathic pulmonary fibrosis. We developed an in vitro mechanical scratch injury model in air-liquid interface differentiated primary human small airway epithelial cells that recapitulates many of the characteristics observed during epithelial wound injury in both human tissue and small animal models...
2017: PloS One
https://www.readbyqxmd.com/read/28853608/mesenchymal-stromal-cell-exosomes-ameliorate-experimental-bronchopulmonary-dysplasia-and-restore-lung-function-through-macrophage-immunomodulation
#10
Gareth R Willis, Angeles Fernandez-Gonzalez, Jamie Anastas, Sally H Vitali, Xianlan Liu, Maria Ericsson, April Kwong, S Alex Mitsialis, Stella Kourembanas
RATIONALE: Mesenchymal stem/stromal cell (MSC) therapies have shown promise in preclinical models of pathologies relevant to newborn medicine, such as bronchopulmonary dysplasia (BPD). We have reported that the therapeutic capacity of MSCs is comprised in their secretome, and demonstrated that the therapeutic vectors are exosomes produced by MSCs (MSC-exos). OBJECTIVE: To assess efficacy of MSC-exo treatment in a pre-clinical model of BPD and to investigate mechanisms underlying MSC-exo therapeutic action...
August 30, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28819748/lipoxin-a4-attenuates-bronchopulmonary-dysplasia-via-upregulation-of-let-7c-and-downregulation-of-tgf-%C3%AE-1-signaling-pathway
#11
Xiao-Qing Chen, Sheng-Hua Wu, Yan-Yan Luo, Bing-Jie Li, Shu-Jun Li, Hong-Yan Lu, Rui Jin, Zhong-Yi Sun
Transforming growth factor-β (TGF-β) superfamily members are key regulators for lung development and progress of bronchopulmonary dysplasia (BPD). The mechanisms by which lipoxin A4 (LXA4) attenuates development of BPD have not been clarified. Neonatal murine BPD models were inducted by hyperoxia treatment. Neonatal mice were exposed to room air or 85% O2 hyperoxia with or without treatment with 5S,6R-methyl-LXA4 or anti-TGF-β antibodies. Mouse lung epithelial cells (MLE-12 cells) and mouse embryonic fibroblasts (NIH/3T3 cells) were cultured in room air or 85% O2 followed by treatment of LXA4, anti-TGF-β antibodies, and let-7c mimic/anti-microRNA transfections...
December 2017: Inflammation
https://www.readbyqxmd.com/read/28815723/rapid-automatic-creation-of-monodisperse-emulsion-droplets-by-microfluidic-device-with-degassed-pdms-slab-as-a-detachable-suction-actuator
#12
Yuki Murata, Yuta Nakashoji, Masaki Kondo, Yugo Tanaka, Masahiko Hashimoto
We previously developed a technique that enabled automatic creation of monodisperse water-in-oil droplets with the use of an air-evacuated PDMS microfluidic device. Although the device generated droplets over a long-time period, the production rate was slow (∼10 droplets per second). In the current study, we aimed to improve this rate, using the same fluid pumping principle described in our previous work, by remodeling our device configuration. To achieve this aim, we developed a new device with a much larger PDMS surface area-to-volume ratio within the air-trapping void space (178 cm(-1) ), than that of our earlier device (5...
August 16, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28804458/induced-pluripotent-stem-cells-derived-mesenchymal-stem-cells-attenuate-cigarette-smoke-induced-cardiac-remodeling-and-dysfunction
#13
Yingmin Liang, Xiang Li, Yuelin Zhang, Sze Chun Yeung, Zhe Zhen, Mary S M Ip, Hung Fat Tse, Qizhou Lian, Judith C W Mak
The strong relationship between cigarette smoking and cardiovascular disease (CVD) has been well-documented, but the mechanisms by which smoking increases CVD risk appear to be multifactorial and incompletely understood. Mesenchymal stem cells (MSCs) are regarded as an important candidate for cell-based therapy in CVD. We hypothesized that MSCs derived from induced pluripotent stem cell (iPSC-MSCs) or bone marrow (BM-MSCs) might alleviate cigarette smoke (CS)-induced cardiac injury. This study aimed to investigate the effects of BM-MSCs or iPSC-MSCs on CS-induced changes in serum and cardiac lipid profiles, oxidative stress and inflammation as well as cardiac function in a rat model of passive smoking...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28792962/aberrant-cgmp-signaling-persists-during-recovery-in-mice-with-oxygen-induced-pulmonary-hypertension
#14
Marta Perez, Keng Jin Lee, Herminio J Cardona, Joann M Taylor, Mary E Robbins, Gregory B Waypa, Sara K Berkelhamer, Kathryn N Farrow
Bronchopulmonary dysplasia (BPD), a common complication of preterm birth, is associated with pulmonary hypertension (PH) in 25% of infants with moderate to severe BPD. Neonatal mice exposed to hyperoxia for 14d develop lung disease similar to BPD, with evidence of associated PH. The cyclic guanosine monophosphate (cGMP) signaling pathway has not been well studied in BPD-associated PH. In addition, there is little data about the natural history of hyperoxia-induced PH in mice or the utility of phosphodiesterase-5 (PDE5) inhibition in established disease...
2017: PloS One
https://www.readbyqxmd.com/read/28775094/x-ray-based-lung-function-measurement-reveals-persistent-loss-of-lung-tissue-elasticity-in-mice-recovered-from-allergic-airway-inflammation
#15
Marietta Andrea Markus, Sergej Borowik, Marius Reichardt, Giuliana Tromba, Frauke Alves, Christian Dullin
Chronic asthma patients experience difficulties even years after the inciting allergen. Although studies in small animal asthma models have enormously advanced progress in uncovering the mechanisms of inception and development of the disease, little is known about the processes involved in the persistence of asthma symptoms in the absence of allergen exposure. Long term asthma mouse models have so far been scarce or not been able to reproduce the findings in patients. Here we used a common ovalbumin induced acute allergic airway inflammation mouse model to study lung function and remodeling after a four months recovery period...
August 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28727907/novel-role-of-surfactant-protein-a-in-bacterial-sinusitis
#16
George T Noutsios, Amanda L Willis, Julie G Ledford, Eugene H Chang
BACKGROUND: Chronic rhinosinusitis (CRS) is a common inflammatory disorder of the upper airway characterized by chronic inflammation and significant sinonasal remodeling. CRS is comprised of 2 major subgroups, based on whether polyps are present or absent. In some cases, it is characterized by colonization with opportunistic pathogens such as Pseudomonas aeruginosa (PA), Staphylococcus aureus, and other bacteria. The innate immune system of the sinonasal epithelium is the first line of defense against inhaled pathogens...
September 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28723225/preferential-generation-of-15-hete-pe-induced-by-il-13-regulates-goblet-cell-differentiation-in-human-airway-epithelial-cells
#17
Jinming Zhao, Yoshinori Minami, Emily Etling, John M Coleman, Sarah N Lauder, Victoria Tyrrell, Maceler Aldrovandi, Valerie O'Donnell, Hans-Erik Claesson, Valerian Kagan, Sally Wenzel
RATIONALE: Type-2-associated goblet cell hyperplasia and mucus hypersecretion are well known features of asthma. 15-Lipoxygenase (15LO1) is induced by the Type-2 cytokines/IL-13 in human airway epithelial cells (HAEC) in vitro and is increased in fresh asthmatic HAECs ex vivo. 15LO1 generates a variety of products, including 15-hydroxyeicosatetraenoic acid (15-HETE), 15-HETE-phosphatidyethanoloamine (PE) (15-HETE-PE) and 13-hydroxyoctadecadienoic acid (13-HODE). The current study investigated the 15LO1 metabolite profile at baseline and after IL-13 treatment, and the influence on goblet cell differentiation in HAECs...
July 19, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28700567/recombinant-ccn1-prevents-hyperoxia-induced-lung-injury-in-neonatal-rats
#18
Ruben Vaidya, Ronald Zambrano, Julia K Hummler, Shihua Luo, Matthew R Duncan, Karen Young, Lester F Lau, Shu Wu
BackgroundCystein-rich protein 61 (Cyr61/CCN1) is a member of the CCN family of matricellular proteins that has an important role in tissue development and remodeling. However, the role of CCN1 in the pathogenesis of bronchopulmonary dysplasia (BPD) is unknown. Accordingly, we have investigated the effects of CCN1 on a hyperoxia-induced lung injury model in neonatal rats.MethodsIn experiment 1, newborn rats were randomized to room air (RA) or 85% oxygen (O2) for 7 or 14 days, and we assessed the expression of CCN1...
November 2017: Pediatric Research
https://www.readbyqxmd.com/read/28700139/oct-layered-tomography-of-the-cornea-provides-new-insights-on-remodeling-after-photorefractive-keratectomy
#19
Rachana S Chandapura, Rohit Shetty, Rushad Shroff, Neha Shilpy, Mathew Francis, Abhijit Sinha Roy
OCT (optical coherence tomography) of corneal layers was generated to analyze the remodeling of the epithelium and stroma after photorefractive keratectomy (PRK). Myopic PRK was performed in 15 patients. One eye underwent manual scraping of epithelium while the other was treated with Epi clear. Epi clear allowed a gentler removal of the epithelium compared to manual scraping. Scheimpflug (Pentacam, OCULUS Optikgerate Gmbh, Wetzlar, Germany) and OCT (RTVue, Optovue Inc., Fremont, California, USA) scans of the cornea were performed before and after PRK (3 months)...
July 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28543436/prenatal-environmental-tobacco-smoke-exposure-increases-allergic-asthma-risk-with-methylation-changes-in-mice
#20
Sonja Christensen, Zeina Jaffar, Elizabeth Cole, Virginia Porter, Maria Ferrini, Britten Postma, Kent E Pinkerton, Mihi Yang, Yang Jee Kim, Luke Montrose, Kevan Roberts, Andrij Holian, Yoon Hee Cho
Allergic asthma remains an inadequately understood disease. In utero exposure to environmental tobacco smoke (ETS) has been identified as an environmental exposure that can increase an individual's asthma risk. To improve our understanding of asthma onset and development, we examined the effect of in utero ETS exposure on allergic disease susceptibility in an asthmatic phenotype using a house dust mite (HDM) allergen-induced murine model. Pregnant C57BL/6 mice were exposed to either filtered air or ETS during gestation, and their offspring were further exposed to HDM at 6-7 weeks old to induce allergic inflammation...
July 2017: Environmental and Molecular Mutagenesis
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