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https://www.readbyqxmd.com/read/28237928/robust-multi-exposure-image-fusion-a-structural-patch-decomposition-approach
#1
Kede Ma, Hui Li, Hongwei Yong, Zhou Wang, Deyu Meng, Lei Zhang
We propose a simple yet effective structural patch decomposition (SPD) approach for multi-exposure image fusion (MEF) that is robust to ghosting effect. We decompose an image patch into three conceptually independent components: signal strength, signal structure, and mean intensity. Upon fusing these three components separately, we reconstruct a desired patch and place it back into the fused image. This novel patch decomposition approach benefits MEF in many aspects. First, as opposed to most pixel-wise MEF methods, the proposed algorithm does not require post-processing steps to improve visual quality or to reduce spatial artifacts...
February 20, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28231656/-acute-effect-of-ambient-air-pollution-on-small-airway-lung-functions-among-school-children-in-shanghai
#2
L J Zhang, C Y Guo, H H Xu, D Xu, X B Shen, X Y Du, M H Zhang, J G Tan, J H Zhang, C Y Dong, H L Qian, Y W Shi, M Z Pan, X D Zhou
Objective: To study the acute effects of compound ambient air pollution on small airway lung functions among school children in Shanghai. Method: A longitudinal survey on lung functions was conducted among 233 school-children from three schools (A, B and C, located in innerring, mid-ring and outer-ring areas). Lung function test was performed once a week for 3 times respectively, among children in school A and B in Dec. 2013 and in school C in Dec. 2014. The fourth lung function test was tested in Jun. 2014 and May 2015 in the respective schools...
February 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28217805/-induction-of-robust-senescence-associated-secretory-phenotype-in-mouse-nih-3t3-cells-by-mitomycin-c
#3
Wei-Xing Huang, Xiao-Xuan Guo, Zhong-Zhi Peng, Chun-Liang Weng, Chun-Yan Huang, Ben-Yan Shi, Jie Yang, Xiao-Xin Liao, Xiao-Yi Li, Hui-Ling Zheng, Xin-Guang Liu, Xue-Rong Sun
Senescence-associated secretory phenotype (SASP) is often a concomitant result of cell senescence, embodied by the enhanced function of secretion. The SASP factors secreted by senescent cells include cytokines, proteases and chemokines, etc, which can exert great influence on local as well as systemic environment and participate in the process of cell senescence, immunoregulation, angiogenesis, cell proliferation and tumor invasion, etc. Relative to the abundance of SASP models in human cells, the in vitro SASP model derived from mouse cells is scarce at present...
February 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28215918/molecular-detection-of-genes-responsible-for-macrolide-resistance-among-streptococcus-pneumoniae-isolated-in-north-lebanon
#4
Salam El Ashkar, Marwan Osman, Rayane Rafei, Hassan Mallat, Marcel Achkar, Fouad Dabboussi, Monzer Hamze
In recent years, the increased use of macrolides was linked with the emergence of resistance Streptococcus pneumoniae worldwide. The main aim of this study was to determine the prevalence of S. pneumoniae resistant to macrolides and to identify the macrolide resistance genotypes among clinical isolates collected in North Lebanon. Disk diffusion susceptibility method was performed for 132 strains of S. pneumoniae isolated over a period of 5 years in North Lebanon. Polymerase Chain Reaction followed by pyrosequencing was carried out for confirmation of phenotypic diagnosis...
February 16, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28211632/amp-activated-protein-kinase-activator-a-769662-increases-intracellular-calcium-and-atp-release-from-astrocytes-in-an-ampk-independent-manner
#5
Julia M Vlachaki Walker, Josephine L Robb, Ana M Cruz, Amrinder Malhi, Paul G Weightman Potter, Michael L J Ashford, Rory J McCrimmon, Kate L J Ellacott, Craig Beall
AIM: Astrocytes are the main sources of extracellular ATP (eATP) within the brain, which functions as a gliotransmitter, capable of modulating neuronal and astrocytic activity. These cells play an important role in regulating energy homeostasis partly via astrocyte-derived ATP. Given the role of AMPK in regulating intracellular ATP levels, we hypothesised that AMPK may alter ATP release from astrocytes. METHODS: Measurements of ATP release were made from human U373 astrocytoma cells, primary mouse hypothalamic (HTAS) and cortical astrocytes (CRTAS) and wild type and AMPK α1/α2 null mouse embryonic fibroblasts (MEFs)...
February 17, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28211324/aqueous-chlorination-of-fenamic-acids-kinetic-study-transformation-products-identification-and-toxicity-prediction
#6
Liyun Ma, Jian Li, Li Xu
Fenamic acids, one important type of non-steroidal anti-inflammatory drugs, are ubiquitous in environmental matrices. Thus it is of high significance to know the fate of them during chlorination disinfection considering their potential toxicity to the environment and humans. In the present study, the chlorination kinetics of three fenamic acids, i.e. mefenamic acid (MEF), tolfenamic acid (TOL) and clofenamic acid (CLO), were examined at different pHs, which followed second-order reaction under studied conditions...
February 8, 2017: Chemosphere
https://www.readbyqxmd.com/read/28206988/inhibition-of-autophagy-blocks-cathepsins-tbid-mitochondrial-apoptotic-signaling-pathway-via-stabilization-of-lysosomal-membrane-in-ischemic-astrocytes
#7
Xian-Yong Zhou, Yu Luo, Yong-Ming Zhu, Zhi-He Liu, Thomas A Kent, Jia-Guo Rong, Wei Li, Shi-Gang Qiao, Min Li, Yong Ni, Kazumi Ishidoh, Hui-Ling Zhang
Our previous study and others have demonstrated that autophagy is activated in ischemic astrocytes and contributes to astrocytic cell death. However, the mechanisms of ischemia-induced autophagy remain largely unknown. In this study, we established a rat's model of permanent middle cerebral artery occlusion (pMCAO) and an in vitro oxygen and glucose deprivation (OGD) model. Autophagy was inhibited by either pharmacological treatment with 3-methyladenine (3-MA) and wortmannin (Wort) or genetic treatment with knockdown of Atg5 in primary cultured astrocytes and knockout of Atg5 in mouse embryonic fibroblast (MEF) cells, respectively...
February 16, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28204974/lipid-peroxidation-dependent-cell-death-regulated-by-gpx4-and-ferroptosis
#8
Hirotaka Imai, Masaki Matsuoka, Takeshi Kumagai, Taro Sakamoto, Tomoko Koumura
Glutathione peroxidase 4 (Phospholipid hydroperoxide glutathione peroxidase, PHGPx) can directly reduce phospholipid hydroperoxide. Depletion of GPx4 induces lipid peroxidation-dependent cell death in embryo, testis, brain, liver, heart, and photoreceptor cells of mice. Administration of vitamin E in tissue specific GPx4 KO mice restored tissue damage in testis, liver, and heart. These results indicate that suppression of phospholipid peroxidation is essential for cell survival in normal tissues in mice. Ferroptosis is an iron-dependent non-apoptotic cell death that can elicited by pharmacological inhibiting the cystine/glutamate antiporter, system Xc(-) (type I) or directly binding and loss of activity of GPx4 (Type II) in cancer cells with high level RAS-RAF-MEK pathway activity or p53 expression, but not in normal cells...
February 16, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28196862/mtorc1-activity-is-required-to-maintain-canonical-endocytic-recycling-pathway-against-lysosomal-delivery
#9
Kristin Dauner, Walaa Eid, Riya Raghupathy, John Presley, Xiaohui Zha
The plasma membrane of mammalian cells undergoes constitutive endocytosis, endocytic sorting and recycling, which delivers nutrients to the lysosomes. The receptors, along with membrane lipids, are normally returned to the plasma membrane to sustain this action. It is not known, however, whether this process is influenced by metabolic conditions. Here we report that endocytic recycling requires active mTORC1, a master metabolic sensor. Upon mTORC1 inactivation, either by starvation or by inhibitors, plasma membrane lipids and recycling receptors, such as sphingomyelin and transferrin receptors, are delivered to the lysosomes...
February 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28196481/nuctools-analysis-of-chromatin-feature-occupancy-profiles-from-high-throughput-sequencing-data
#10
Yevhen Vainshtein, Karsten Rippe, Vladimir B Teif
BACKGROUND: Biomedical applications of high-throughput sequencing methods generate a vast amount of data in which numerous chromatin features are mapped along the genome. The results are frequently analysed by creating binary data sets that link the presence/absence of a given feature to specific genomic loci. However, the nucleosome occupancy or chromatin accessibility landscape is essentially continuous. It is currently a challenge in the field to cope with continuous distributions of deep sequencing chromatin readouts and to integrate the different types of discrete chromatin features to reveal linkages between them...
February 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28195154/zinc-finger-protein-zpr9-functions-as-an-activator-of-ampk-related-serine-threonine-kinase-mpk38-melk-involved-in-ask1-tgf-%C3%AE-p53-signaling-pathways
#11
Hyun-A Seong, Ravi Manoharan, Hyunjung Ha
Murine protein serine-threonine kinase 38 (MPK38), an AMP-activated protein kinase (AMPK)-related kinase, has been implicated in the induction of apoptosis signal-regulating kinase 1 (ASK1)-, transforming growth factor-β (TGF-β)-, and p53-mediated activity involved in metabolic homeostasis. Here, zinc finger protein ZPR9 was found to be an activator of MPK38. The association of MPK38 and ZPR9 was mediated by cysteine residues present in each of these two proteins, Cys(269) and Cys(286) of MPK38 and Cys(305) and Cys(308) of ZPR9...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28192743/behavior-of-leucine-rich-repeat-containing-g-protein-coupled-receptor-5-expressing-cells-in-the-reprogramming-process
#12
Yuko Arioka, Hiroyasu Ito, Akihiro Hirata, Katsunori Semi, Yasuhiro Yamada, Mitsuru Seishima
It remains unclear what cells are proper for the generation of induced pluripotent stem cells (iPSCs). Leucine-rich repeat-containing G-protein coupled receptor 5 (Lgr5) is well known as a tissue stem cell and progenitor marker, both of which are reported to be sensitive to reprogramming. In the present study, we examined the reprogramming behavior of Lgr5-expressing cells (Lgr5+ cells). First, we compared reprogramming behavior using mouse Lgr5+ and Lgr5 negative (Lgr5-) hair follicles (HFs). The number of alkaline phosphatase staining-positive cells was lesser in a well of Lgr5+ HFs than in Lgr5- HFs; however, the ratio of Nanog+ SSEA1+ cells in the cell mixture derived from Lgr5+ HFs was much higher than that from Lgr5- HFs...
February 4, 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28192531/multi-layered-control-of-galectin-8-mediated-autophagy-during-adenovirus-cell-entry-through-a-conserved-ppxy-motif-in-the-viral-capsid
#13
Charlotte Montespan, Shauna A Marvin, Sisley Austin, Andrew M Burrage, Benoit Roger, Fabienne Rayne, Muriel Faure, Edward M Campell, Carola Schneider, Rudolph Reimer, Kay Grünewald, Christopher M Wiethoff, Harald Wodrich
Cells employ active measures to restrict infection by pathogens, even prior to responses from the innate and humoral immune defenses. In this context selective autophagy is activated upon pathogen induced membrane rupture to sequester and deliver membrane fragments and their pathogen contents for lysosomal degradation. Adenoviruses, which breach the endosome upon entry, escape this fate by penetrating into the cytosol prior to autophagosome sequestration of the ruptured endosome. We show that virus induced membrane damage is recognized through Galectin-8 and sequesters the autophagy receptors NDP52 and p62...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28191924/control-of-an-unusual-photo-claisen-rearrangement-in-coumarin-caged-tamoxifen-through-an-extended-spacer
#14
Pamela T Wong, Edward W Roberts, Shengzhuang Tang, Jhindan Mukherjee, Jayme Cannon, Alyssa J Nip, Kaitlin Corbin, Matthew F Krummel, Seok Ki Choi
The use of coumarin caged molecules has been well documented in numerous photocaging applications including for the spatiotemporal control of Cre-estrogen receptor (Cre-ERT2) recombinase activity. In this article, we report that 4-hydroxytamoxifen (4OHT) caged with coumarin via a conventional ether linkage led to an unexpected photo-Claisen rearrangement which significantly competed with the release of free 4OHT. The basis for this unwanted reaction appears to be related to the coumarin structure and its radical-based mechanism of uncaging as it did not occur in ortho-nitrobenzyl (ONB) caged 4OHT that was otherwise linked in the same manner...
February 13, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28187702/adaptation-response-of-pseudomonas-fragi-on-refrigerated-solid-matrix-to-a-moderate-electric-field
#15
Wenbo Chen, Honghai Hu, Chunjiang Zhang, Feng Huang, Dequan Zhang, Hong Zhang
BACKGROUND: Moderate electric field (MEF) technology is a promising food preservation strategy since it relies on physical properties-rather than chemical additives-to preserve solid cellular foods during storage. However, the effectiveness of long-term MEF exposure on the psychrotrophic microorganisms responsible for the food spoilage at cool temperatures remains unclear. RESULTS: The spoilage-associated psychrotroph Pseudomonas fragi MC16 was obtained from pork samples stored at 7 °C...
February 10, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28186989/inhibiting-dna-pkcs-in-a-non-homologous-end-joining-pathway-in-response-to-dna-double-strand-breaks
#16
Jun Dong, Tian Zhang, Yufeng Ren, Zhenyu Wang, Clifton C Ling, Fuqiu He, Gloria C Li, Chengtao Wang, Bixiu Wen
DNA-dependent protein kinase catalytic subunit (DNA-PKcs) is a distinct factor in the non-homologous end-joining (NHEJ) pathway involved in DNA double-strand break (DSB) repair. We examined the crosstalk between key proteins in the DSB NHEJ repair pathway and cell cycle regulation and found that mouse embryonic fibroblast (MEF) cells deficient in DNA-PKcs or Ku70 were more vulnerable to ionizing radiation (IR) compared with wild-type cells and that DSB repair was delayed. γH2AX was associated with phospho-Ataxia-telangiectasia mutated kinase (Ser1987) and phospho-checkpoint effector kinase 1 (Ser345) foci for the arrest of cell cycle through the G2/M phase...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28182772/murine-cytomegalovirus-infection-of-mouse-macrophages-stimulates-early-expression-of-suppressor-of-cytokine-signaling-socs-1-and-socs3
#17
Christine I Alston, Richard D Dix
Human cytomegalovirus (HCMV) is a species-specific β-herpesvirus that infects for life up to 80% of the world's population and causes severe morbidity in at-risk immunocompromised populations. Suppressors of cytokine signaling (SOCS)1 and SOCS3 are host proteins that act as inducible negative feedback regulators of cytokine signaling and have been implicated in several ocular diseases and viral infections. We recently found in our mouse model of experimental cytomegalovirus retinitis that subretinally-injected murine cytomegalovirus (MCMV) stimulates ocular SOCS1 and SOCS3 during retrovirus-induced immune suppression of murine AIDS (MAIDS), and that infiltrating macrophages are prominent cellular sources of retinal SOCS1 and SOCS3 expression...
2017: PloS One
https://www.readbyqxmd.com/read/28180088/human-case-of-bacteremia-caused-by-streptococcus-canis-sequence-type-9-harboring-the-scm-gene
#18
Daisuke Taniyama, Yoshihiko Abe, Tetsuya Sakai, Takahide Kikuchi, Takashi Takahashi
Streptococcus canis (Sc) is a zoonotic pathogen that is transferred mainly from companion animals to humans. One of the major virulence factors in Sc is the M-like protein encoded by the scm gene, which is involved in anti-phagocytic activities, as well as the recruitment of plasminogen to the bacterial surface in cooperation with enolase, and the consequent enhancement of bacterial transmigration and survival. This is the first reported human case of uncomplicated bacteremia following a dog bite, caused by Streptococcus canis harboring the scm gene...
2017: IDCases
https://www.readbyqxmd.com/read/28178138/etiology-of-acute-otitis-media-and-serotype-distribution-of-streptococcus-pneumoniae-and-haemophilus-influenzae-in-chilean-children-5-years-of-age
#19
Andres Rosenblut, Carla Napolitano, Angelica Pereira, Camilo Moreno, Devayani Kolhe, Alejandro Lepetic, Eduardo Ortega-Barria
The impact of bacterial conjugate vaccines on acute otitis media (AOM) is affected by several factors including population characteristics, bacterial etiology and vaccine conjugation method, carrier, and coverage. This study estimated the baseline etiology, distribution, and antibiotic susceptibility of bacterial serotypes that causes AOM in children aged <5 years in a public setting in Santiago, Chile.Children aged ≥3 months and <5 years referred to the physician for treatment of AOM episodes (with an onset of symptoms <72 h) were enrolled between September 2009 and September 2010...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28177298/high-aspect-ratio-silicon-nanowires-control-fibroblast-adhesion-and-cytoskeleton-organization
#20
Laura Andolfi, Anna Murello, Damiano Cassese, Jelena Ban, Simone Dal Zilio, Marco Lazzarino
The cell-cell and cell-matrix interactions are essential to the survival and proliferation of most cells, and are responsible of triggering a wide range of biochemical pathways. More recently, also the biomechanical role of those interactions was highlighted, showing, for instance that adhesion forces are essential for the cytoskeleton organization. Silicon-nanowires (Si-NWs) with their small size, high aspect ratio and anisotropic mechanical response represent a useful model to investigate the forces involved in the adhesion processes and their role in the cellular development...
February 8, 2017: Nanotechnology
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