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https://www.readbyqxmd.com/read/27905295/desensitization-of-idiopathic-pulmonary-fibrosis-fibroblasts-to-alternaria-alternata-extract-mediated-necrotic-cell-death
#1
Jintaek Im, Kyutae Kim, Ji Young Yhee, Scott M O'Grady, Richard S Nho
Alternaria alternata is an allergenic fungus and known to cause an upper respiratory tract infection and asthma in humans with compromised immunity. Although A. alternata's effect on airway epithelial cells has previously been examined, the potential role of A. alternata on lung fibroblast viability is not understood. Since lung fibroblasts derived from patients with idiopathic pulmonary fibrosis (IPF) display a distinct phenotype that is resistant to stress and cell death inducing conditions, the investigation of the role of Alternaria on pathological IPF fibroblasts provides a better understanding of the fibrotic process induced by an allergenic fungus...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27904529/anti-aggregatory-effect-of-boswellic-acid-in-high-fat-fed-rats-involvement-of-redox-and-inflammatory-cascades
#2
Mona Kamal Tawfik
INTRODUCTION: A high-fat diet is one of the main dietary factors promoting platelet aggregation. The present study was conducted to elucidate the involvement of boswellic acid (BA) on the platelet hyperaggregability in HFD-fed rats. As platelet hyperaggregability in HFD rats is closely linked to inflammation and enhanced free radical production, the present study was extended to evaluate the anti-inflammatory and anti-oxidative effect of BA on HFD-promoted platelet aggregation. MATERIAL AND METHODS: Rats were assigned to normal, HFD-fed, aspirin-treated (30 mg/kg), and BA-treated (250 and 500 mg/kg) groups...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27901646/the-time-dependent-health-and-biochemical-effects-in-rats-exposed-to-stainless-steel-welding-dust-and-its-soluble-form
#3
Tadeusz Halatek, Magdalena Stanislawska, Irena Kaminska, Malgorzata Cieslak, Radoslaw Swiercz, Wojciech Wasowicz
Welding processes that generate fumes containing toxic metals, such as hexavalent chromium (Cr(VI)), manganese (Mn), and nickel (Ni), have been implicated in lung injury, inflammation, and lung tumor promotion in animal models. The principal objective of this study was to determine the dynamics of toxic effects of inhalation exposure to morphologically rated welding dust from stainless steel welding and its soluble form in TSE System with a dynamic airflow. We assessed the pulmonary toxicity of welding dust in Wistar rats exposed to 60...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27901512/mitochondrial-dysfunction-in-alveolar-and-white-matter-developmental-failure-in-premature-infants
#4
Vadim S Ten
At birth, some organs in premature infants are not developed enough to meet challenges of the extra-uterine life. Although growth and maturation continues after premature birth, postnatal organ development may become sluggish or even arrested, leading to organ dysfunction. There is no clear mechanistic concept of this postnatal organ developmental failure in premature neonates. This review introduces a concept-forming hypothesis: Mitochondrial bioenergetic dysfunction is a fundamental mechanism of organs maturation failure in premature infants...
November 30, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27898232/unfolded-protein-response-promotes-doxorubicin-induced-nonsmall-cell-lung-cancer-cells-apoptosis-via-the-mtor-pathway-inhibition
#5
Xiaofang Zhao, Yan Yang, Fuli Yao, Bin Xiao, Ying Cheng, Chunhong Feng, Chunyan Duan, Chunyan Zhang, Youping Liu, Hong Li, Bo Xiao, Rongyang Dai
Drug resistance is extremely common in nonsmall-cell lung cancer (NSCLC) and is one of the major problems in NSCLC chemotherapy. However, the detailed mechanisms remain largely unknown. Unfolded protein response (UPR) is involved in the tumorigenesis of NSCLC. Here, the authors demonstrated that the UPR promotes poly (ADP-ribose) polymerase activation (PARP) cleavage in NSCLC cells on doxorubicin treatment, which is a hallmark of apoptosis and caspase activation. In NSCLC cells, doxorubicin treatment triggers the UPR activation, which subsequently promotes doxorubicin-mediated apoptosis...
November 29, 2016: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/27897011/a-spatiotemporal-model-to-simulate-chemotherapy-regimens-for-heterogeneous-bladder-cancer-metastases-to-the-lung
#6
Kimberly R Kanigel Winner, James C Costello
Tumors are composed of heterogeneous populations of cells. Somatic genetic aberrations are one form of heterogeneity that allows clonal cells to adapt to chemotherapeutic stress, thus providing a path for resistance to arise. In silico modeling of tumors provides a platform for rapid, quantitative experiments to inexpensively study how compositional heterogeneity contributes to drug resistance. Accordingly, we have built a spatiotemporal model of a lung metastasis originating from a primary bladder tumor, incorporating in vivo drug concentrations of first-line chemotherapy, resistance data from bladder cancer cell lines, vascular density of lung metastases, and gains in resistance in cells that survive chemotherapy...
2016: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/27895312/activation-of-endoplasmic-reticulum-stress-and-the-extrinsic-apoptotic-pathway-in-human-lung-cancer-cells-by-the-new-synthetic-flavonoid-lz-205
#7
Yi Zhang, Xuefen Xu, Wei Li, Hanchi Miao, Shaoliang Huang, Yuxin Zhou, Yang Sun, Zhiyu Li, Qinglong Guo, Li Zhao
It has been shown that flavonoids have anti-tumor activity. In this study, LZ-205, a newly synthesized flavonoid, was found to be effective in inducing apoptosis in human lung cancer cells in vivo and in vitro. Mechanistically, LZ-205 triggers reactive oxygen species (ROS)-induced endoplasmic reticulum (ER) stress and unfolded protein response, which could be reversed by silencing CHOP, a mediator of the ER stress-associated apoptosis. In addition, LZ-205-induced apoptosis is accompanied by the activation of both the mitochondrial apoptotic and extrinsic pathways, followed by decreased mitochondrial membrane potential (ΔΨm) and the alteration of the expression of mitochondria-related pro- and anti-apoptotic proteins...
November 24, 2016: Oncotarget
https://www.readbyqxmd.com/read/27894854/decreased-level-of-endogenous-ghrelin-is-involved-in-the-progression-of-lung-injury-induced-by-oleic-acid
#8
Zhijun Liu, Ting Yu, Haitao Yang, Xiuli Tian, Linlin Feng
AIMS: Acute lung injury (ALI) is associated with excessive mortality and lacks appropriate therapy. Ghrelin is a novel peptide that protects the lung against ALI. This study aimed to investigate the role of endogenous ghrelin in the pathogenesis of ALI. MAIN METHODS: We used a rat oleic acid (OA)-induced ALI model. Pulmonary impairment was detected by hematoxylin and eosin (HE) staining, lung mechanics, wet/dry weight ratio, and arterial blood gas analysis. Plasma and lung content of ghrelin was examined by ELISA, and mRNA expression of ghrelin was measured by quantitative real-time PCR...
November 25, 2016: Life Sciences
https://www.readbyqxmd.com/read/27894755/dna-damage-induced-by-coal-dust-fly-and-bottom-ash-from-coal-combustion-evaluated-using-the-micronucleus-test-and-comet-assay-in-vitro
#9
Cristina Araujo Matzenbacher, Ana Letícia Hilario Garcia, Marcela Silva Dos Santos, Caroline Cardoso Nicolau, Suziane Premoli, Dione Silva Corrêa, Claudia Telles de Souza, Liana Niekraszewicz, Johnny Ferraz Dias, Tânia Valéria Delgado, Wolfgang Kalkreuth, Ivana Grivicich, Juliana da Silva
Coal mining and combustion generating huge amounts of bottom and fly ash are major causes of environmental pollution and health hazards due to the release of polycyclic aromatic hydrocarbons (PAH) and heavy metals. The Candiota coalfield in Rio Grande do Sul, is one of the largest open-cast coal mines in Brazil. The aim of this study was to evaluate genotoxic and mutagenic effects of coal, bottom ash and fly ash samples from Candiota with the comet assay (alkaline and modified version) and micronucleus test using the lung fibroblast cell line (V79)...
November 22, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27894293/lung-bioengineering-physical-stimuli-and-stem-progenitor-cell-biology-interplay-towards-biofabricating-a-functional-organ
#10
REVIEW
Paula N Nonaka, Juan J Uriarte, Noelia Campillo, Vinicius R Oliveira, Daniel Navajas, Ramon Farré
A current approach to obtain bioengineered lungs as a future alternative for transplantation is based on seeding stem cells on decellularized lung scaffolds. A fundamental question to be solved in this approach is how to drive stem cell differentiation onto the different lung cell phenotypes. Whereas the use of soluble factors as agents to modulate the fate of stem cells was established from an early stage of the research with this type of cells, it took longer to recognize that the physical microenvironment locally sensed by stem cells (e...
November 28, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27894210/protective-effects-of-lemongrass-essential-oil-against-benzo-a-pyrene-induced-oxidative-stress-and-dna-damage-in-human-embryonic-lung-fibroblast-cells
#11
Jiao Jiang, Henggui Xu, Hetong Wang, Yining Zhang, Ping Ya, Chun Yang, Fasheng Li
Benzo(a)pyrene (BaP) was a well-known environmental pollutant, numerous studies had implicated BaP as a causative agent in human cancer, particularly lung cancer.The lemongrass essential oil (LEO) possessed various pharmacological activities, especially the anti-oxidative stress and cancer prevention. In the current study, human embryonic lung fibroblast (HELF) cells were treated with 25 mM BaP in the absence or presence of 0.5%, 1% or 2.5% LEO and the cell viability and levels of oxidative stress and DNA damage in the cells were then measured...
November 28, 2016: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/27893721/biomarkers-associated-with-bronchopulmonary-dysplasia-mortality-in-premature-infants
#12
Jessica Balena-Borneman, Namasivayam Ambalavanan, Hemant K Tiwari, Russell L Griffin, Brian Halloran, David Askenazi
BACKGROUND: Bronchopulmonary dysplasia (BPD) portends lifelong organ impairment and death. Our ability to predict BPD in first days of life is limited, but could be enhance using novel biomarkers. METHODS: Using an available clinical and urine biomarker database obtained from a prospective 113 infant cohort (birth weight ≤1200 g and/or gestational age ≤31 weeks), we evaluated the independent association of 14 urine biomarkers with BPD/mortality. RESULTS: Two of the 14 urine biomarkers were independently associated with BPD/mortality after controlling for gestational age (GA), small for gestational age (SGA), and intubation status...
November 28, 2016: Pediatric Research
https://www.readbyqxmd.com/read/27893716/hic-5-remodeling-of-the-stromal-matrix-promotes-breast-tumor-progression
#13
G J Goreczny, J L Ouderkirk-Pecone, E C Olson, M Krendel, C E Turner
The remodeling of the stromal extracellular matrix (ECM) has a crucial, but incompletely understood role during tumor progression and metastasis. Hic-5, a focal adhesion scaffold protein, has previously been implicated in tumor cell invasion, proliferation and metastasis. To investigate the role of Hic-5 in breast tumor progression in vivo, Hic-5(-/-) mice were generated and crossed with the Mouse Mammary Tumor Virus-Polyoma Middle T-Antigen mouse. Tumors from the Hic-5(-/-);PyMT mice exhibited increased latency and reduced growth, with fewer lung metastases, as compared with Hic-5(+/-);PyMT mice...
November 28, 2016: Oncogene
https://www.readbyqxmd.com/read/27893426/sublethal-exposure-to-alpha-radiation-223ra-dichloride-enhances-various-carcinomas-sensitivity-to-lysis-by-antigen-specific-cytotoxic-t-lymphocytes-through-calreticulin-mediated-immunogenic-modulation
#14
Anthony S Malamas, Sofia R Gameiro, Karin M Knudson, James W Hodge
Radium-223 dichloride (Xofigo®; 223Ra) is an alpha-emitting radiopharmaceutical FDA-approved for the treatment of bone metastases in patients with advanced castration-resistant prostate cancer. It is also being examined clinically in patients with breast and lung carcinoma and patients with multiple myeloma. As with other forms of radiation, the aim of 223Ra is to reduce tumor burden by directly killing tumor cells. External beam (photon) and proton radiation have been shown to augment tumor sensitivity to antigen-specific CD8+ cytotoxic T lymphocytes (CTLs)...
November 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27891500/interspecies-communication-between-pathogens-and-immune-cells-via-bacterial-membrane-vesicles
#15
Katerina S Jurkoshek, Ying Wang, Jaffre J Athman, Marian R Barton, Pamela A Wearsch
The production of extracellular vesicles is a universal mechanism for intercellular communication that is conserved across kingdoms. Prokaryotes secrete 50-250 nm membrane vesicles (MVs) in a manner that is regulated by environmental stress and is thought to promote survival. Since many types of host-derived stress are encountered during infection, this implies an important role for MV secretion in bacterial pathogenesis. Accordingly, MVs produced by gram-positive and gram-negative pathogens contain toxins, virulence factors, and other molecules that promote survival in the host...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27890727/synthetic-tambjamine-analogues-induce-mitochondrial-swelling-and-lysosomal-dysfunction-leading-to-autophagy-blockade-and-necrotic-cell-death-in-lung-cancer
#16
Ananda M Rodilla, Luís Korrodi-Gregório, Elsa Hernando, Pilar Manuel-Manresa, Roberto Quesada, Ricardo Pérez-Tomás, Vanessa Soto-Cerrato
Current pharmacological treatments for lung cancer show very poor clinical outcomes, therefore, the development of novel anticancer agents with innovative mechanisms of action is urgently needed. Cancer cells have a reversed pH gradient compared to normal cells, which favors cancer progression by promoting proliferation, metabolic adaptation and evasion of apoptosis. In this regard, the use of ionophores to modulate intracellular pH appears as a promising new therapeutic strategy. Indeed, there is a growing body of evidence supporting ionophores as novel antitumour drugs...
November 24, 2016: Biochemical Pharmacology
https://www.readbyqxmd.com/read/27888691/redox-imbalance-and-mitochondrial-abnormalities-in-the-diabetic-lung
#17
Jinzi Wu, Zhen Jin, Liang-Jun Yan
Although the lung is one of the least studied organs in diabetes, increasing evidence indicates that it is an inevitable target of diabetic complications. Nevertheless, the underlying biochemical mechanisms of lung injury in diabetes remain largely unexplored. Given that redox imbalance, oxidative stress, and mitochondrial dysfunction have been implicated in diabetic tissue injury, we set out to investigate mechanisms of lung injury in diabetes. The objective of this study was to evaluate NADH/NAD(+) redox status, oxidative stress, and mitochondrial abnormalities in the diabetic lung...
November 17, 2016: Redox Biology
https://www.readbyqxmd.com/read/27888631/autophagy-decreases-alveolar-macrophage-apoptosis-by-attenuating-endoplasmic-reticulum-stress-and-oxidative-stress
#18
Tao Fan, Lei Chen, Zhixin Huang, Zhangfan Mao, Wei Wang, Boyou Zhang, Yao Xu, Shize Pan, Hao Hu, Qing Geng
To study the impact of autophagy on alveolar macrophage apoptosis and its mechanism in the early stages of hypoxia, we established a cell hypoxia-reoxygenation model and orthotopic left lung ischemia-reperfusion model. Rat alveolar macrophages stably expressing RFP-LC3 were treated with autophagy inhibitor (3-methyladenine, 3-MA) or autophagy promoter (rapamycin), followed by hypoxia-reoxygenation treatment 2 h, 4 h or 6 h later. Twenty Sprague-Dawley male rats were randomly divided into four different groups: no blocking of left lung hilum (model group), left lung hilum blocked for 1h with DMSO lavage (control group), left lung hilum blocked for 1 h with 100 ml/kg 3-MA (5 μmol/L) lavage (3-MA group), and left lung hilum blocked for 1 h with 100 ml/kg rapamycin (250 nmol/L) lavage (rapamycin group)...
November 24, 2016: Oncotarget
https://www.readbyqxmd.com/read/27887604/variable-ventilation-improves-pulmonary-function-and-reduces-lung-damage-without-increasing-bacterial-translocation-in-a-rat-model-of-experimental-pneumonia
#19
Raquel F de Magalhães, Cynthia S Samary, Raquel S Santos, Milena V de Oliveira, Nazareth N Rocha, Cintia L Santos, Jamil Kitoko, Carlos A M Silva, Caroline L Hildebrandt, Cassiano F Goncalves-de-Albuquerque, Adriana R Silva, Hugo C Faria-Neto, Vanessa Martins, Vera L Capelozzi, Robert Huhle, Marcelo M Morales, Priscilla Olsen, Paolo Pelosi, Marcelo Gama de Abreu, Patricia R M Rocco, Pedro L Silva
BACKGROUND: Variable ventilation has been shown to improve pulmonary function and reduce lung damage in different models of acute respiratory distress syndrome. Nevertheless, variable ventilation has not been tested during pneumonia. Theoretically, periodic increases in tidal volume (VT) and airway pressures might worsen the impairment of alveolar barrier function usually seen in pneumonia and could increase bacterial translocation into the bloodstream. We investigated the impact of variable ventilation on lung function and histologic damage, as well as markers of lung inflammation, epithelial and endothelial cell damage, and alveolar stress, and bacterial translocation in experimental pneumonia...
November 25, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27886851/the-role-of-necroptosis-in-pulmonary-diseases
#20
REVIEW
Kenji Mizumura, Shuichiro Maruoka, Yasuhiro Gon, Augustine M K Choi, Shu Hashimoto
By regulating the cell number and eliminating harmful cells, programmed cell death plays a critical role in development, homeostasis, and disease. While apoptosis is a recognized form of programmed cell death, necrosis was considered a type of uncontrolled cell death induced by extreme physical or chemical stress. However, recent studies have revealed the existence of a genetically programmed and regulated form of necrosis, termed necroptosis. Necroptosis is defined as necrotic cell death that is dependent on receptor-interacting protein kinase 3 (RIPK3)...
November 2016: Respiratory Investigation
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