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https://www.readbyqxmd.com/read/29782983/an-in-vivo-biocompatibility-study-of-surgical-meshes-made-from-bacterial-cellulose-modified-with-chitosan
#1
Joanna Piasecka-Zelga, Piotr Zelga, Joanna Szulc, Justyna Wietecha, Danuta Ciechańska
Bacterial cellulose modified with chitosan (MBC) is an innovative biomaterial used in regenerative medicine which may potentially improve treatment outcomes mesh for hernia repair surgery by facilitating better absorption in native tissue with less risk of mesh-related infections. The aim of the present study was to evaluate the biocompatibility of mesh based on MBC, and determine whether immunological reactions occur due to hypersensitivity to the implants. Forty five Imp:WIST rats were randomly assigned to be implanted with one of three mesh types: simple polypropylene mesh (n = 15), mesh modified by bacterial cellulose only (n = 15) and MBC mesh (n = 15) and evaluated after one and three months following intramuscular implantation...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29781277/morphological-contributions-to-interfacial-charge-trapping-and-non-geminate-recombination-in-polymer-solar-cells-revealed-by-uv-light-soaking
#2
Griffin Canning, Alan K Thomas, David H Dunlap, John K Grey
Non-geminate charge recombination occurs over a broad range of time scales in polymer solar cells and represents a serious loss channel for the performance and lifetime of devices. Multiple factors influence this process, including changes in morphology and formation of permanent defects, but individual contributions are often difficult to resolve from conventional experiment. We use intensity modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS) to investigate non-geminate charge recombination in blends of poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta [2,1-b;3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] (PCPDTBT) and [6,6]-phenyl-C61-butyric acid methyl ester, PCBM) solar cells...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29778843/a-synbiotic-improves-the-immunity-of-white-shrimp-litopenaeus-vannamei-metabolomic-analyses-reveal-compelling-evidence
#3
Truong-Giang Huynh, Ann-Chang Cheng, Chia-Chun Chi, Kuo-Hsun Chiu, Chun-Hung Liu
In this study, we examined the synergistic effects of a diet-administered synbiotic comprising galactooligosaccharide (GOS) and the probiotic Lactobacillus plantarum 7-40 on immune responses, immune-related gene expressions, and disease resistance to Vibrio alginolyticus in white shrimp Litopenaeus vannamei. To unravel the regulatory role of the synbiotic in activating the immune system of shrimp, 1 H nuclear magnetic resonance (NMR)-based metabolomic analyses were used to investigate hepatopancreas metabolites, then significantly altered metabolites were confirmed in both the hepatopancreas and plasma by reverse-phase high-performance liquid chromatography (RP-HPLC) and spectrophotometric analyses...
May 17, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29776709/rapid-real-time-pcr-for-the-detection-of-imp-ndm-vim-kpc-and-oxa-48-carbapenemase-genes-in-isolates-and-spiked-stool-samples
#4
Marianne Lund, Marianne Bøgild Petersen, Anders Lægaard Jørgensen, Dorte Paulmann, Mikala Wang
An in-house real-time PCR was developed to detect the carbapenemase genes IMP, NDM, VIM, KPC and OXA-48 from both bacterial colonies and directly from fecal material. The assay is a multiplex PCR performed in two tubes with NDM, VIM and IMP genes detected in one tube and OXA-48 and KPC genes in the other. Despite the large amount of primers and probes necessary to cover all variants of especially the VIM and IMP genes, the efficiency of the PCR reactions was from 95 to 100%. When tested on 170 clinical strains and compared to culture results from a reference laboratory, 100% correspondence was found...
April 13, 2018: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29776449/imipenem-resistance-in-clinical-escherichia-coli-from-qom-iran
#5
Saeed Shams, Ali Hashemi, Mohammad Esmkhani, Somaye Kermani, Elham Shams, Alessandra Piccirillo
OBJECTIVE: The emergence of metallo-β-lactamase-producing Enterobacteriaceae is a worldwide health concern. In this study, the first evaluation of MBL genes, bla IMP and bla VIM , in Escherichia coli resistant to imipenem isolated from urine and blood specimens in Qom, Iran is described. Three hundred urine and blood specimens were analysed to detect the presence of E. coli. Resistance to imipenem and other antimicrobials was determined by disk diffusion and MIC. MBL production was screened using CDDT...
May 18, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29775996/interplay-between-adenylate-metabolizing-enzymes-and-amp-activated-protein-kinase
#6
REVIEW
Marcella Camici, Simone Allegrini, Maria Grazia Tozzi
Purine nucleotides are involved in a variety of cellular functions, such as energy storage and transfer, and signalling, in addition to being the precursors of nucleic acids and cofactors of many biochemical reactions. They can be generated through two separate pathways, the de novo biosynthesis pathway and the salvage pathway. De novo purine biosynthesis leads to the formation of IMP, from which the adenylate and guanylate pools are generated by two additional steps. The salvage pathways utilize hypoxanthine, guanine and adenine to generate the corresponding mononucleotides...
May 18, 2018: FEBS Journal
https://www.readbyqxmd.com/read/29775685/phenotypic-and-genetic-resistance-traits-in-pseudomonas-aeruginosa-strains-infecting-cystic-fibrosis-patients-a-french-cohort-study
#7
Nathalie Courtois, Yvan Caspar, Max Maurin
Pseudomonas aeruginosa is responsible for chronic respiratory tract colonisation and acute exacerbations in cystic fibrosis (CF) patients. This Gram-negative bacterium often develops multidrug resistance, which represents a therapeutic challenge. Our objective was to characterize the phenotypic and genetic β-lactam resistance traits of P. aeruginosa strains isolated from CF patients followed at Grenoble Alpes university hospital. The susceptibility to β-lactam compounds of 123 P. aeruginosa strains collected from the lower respiratory tract of 45 CF patients, between 2010 and 2014, was evaluated...
May 15, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29774858/genomic-epidemiology-of-global-carbapenemase-producing-enterobacter-spp-2008-2014
#8
Gisele Peirano, Yasufumi Matsumura, Mark D Adams, Patricia Bradford, Mary Motyl, Liang Chen, Barry N Kreiswirth, Johann D D Pitout
We performed whole-genome sequencing on 170 clinical carbapenemase-producing Enterobacter spp. isolates collected globally during 2008-2014. The most common carbapenemase was VIM, followed by New Delhi metallo-β-lactamase (NDM), Klebsiella pneumoniae carbapenemase, oxacillin 48, and IMP. The isolates were of predominantly 2 species (E. xiangfangensis and E. hormaechei subsp. steigerwaltii) and 4 global clones (sequence type [ST] 114, ST93, ST90, and ST78) with different clades within ST114 and ST90. Particular genetic structures surrounding carbapenemase genes were circulating locally in various institutions within the same or between different STs in Greece, Guatemala, Italy, Spain, Serbia, and Vietnam...
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29771420/imp3-promotes-tnbc-stem-cell-property-through-mirna-34a-regulation
#9
Q-D Huang, S-R Zheng, Y-J Cai, D-L Chen, Y-Y Shen, C-Q Lin, X-Q Hu, X-H Wang, H Shi, G-L Guo
OBJECTIVE: To explore the expression and function of insulin-like growth factor II (IGFII) mRNA binding protein (IMP3) in the Triple Negative Breast Cancer (TNBC). MATERIALS AND METHODS: According to previously reported gene expression array, we found that IMP3 had significantly higher expression in the CD44+CD24-ESA+ cell cluster, tumor initiating cell or cancer stem cell (CSCs), compared to other tumor cells. Based on the GEO database (GEO accession No. GSE6883), we detected the mRNA levels of IMP 1,2 and 3 by quantitative polymerase chain reaction (q-PCR) in CD44+CD24-ESA+ cell cluster and other breast tumor cell clusters...
May 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29762790/dietary-supplementation-with-clostridium-butyricum-modulates-serum-lipid-metabolism-meat-quality-and-the-amino-acid-and-fatty-acid-composition-of-peking-ducks
#10
Yanhan Liu, Yiyu Li, Xiancheng Feng, Zhong Wang, Zhaofei Xia
The aim of this study was to investigate the effects of Clostridium butyricum (C. butyricum) on the performance, serum lipid metabolism, muscle morphology, meat quality, and fatty acid profiles of Peking ducks. A total of 1,500 Peking ducks were randomly divided into five groups with five replicates and were fed a non-antibiotic basal diet (Control) or a basal diet supplemented with either 200, 400, or 600 mg/kg of C. butyricum (2.0 × 109 CFU/g) or 150 mg of aureomycin/kg for 42 d. Compared with the control group, supplementation with C...
May 14, 2018: Poultry Science
https://www.readbyqxmd.com/read/29760414/fragment-derived-inhibitors-of-human-n-myristoyltransferase-block-capsid-assembly-and-replication-of-the-common-cold-virus
#11
Aurélie Mousnier, Andrew S Bell, Dawid P Swieboda, Julia Morales-Sanfrutos, Inmaculada Pérez-Dorado, James A Brannigan, Joseph Newman, Markus Ritzefeld, Jennie A Hutton, Anabel Guedán, Amin S Asfor, Sean W Robinson, Iva Hopkins-Navratilova, Anthony J Wilkinson, Sebastian L Johnston, Robin J Leatherbarrow, Tobias J Tuthill, Roberto Solari, Edward W Tate
Rhinoviruses (RVs) are the pathogens most often responsible for the common cold, and are a frequent cause of exacerbations in asthma, chronic obstructive pulmonary disease and cystic fibrosis. Here we report the discovery of IMP-1088, a picomolar dual inhibitor of the human N-myristoyltransferases NMT1 and NMT2, and use it to demonstrate that pharmacological inhibition of host-cell N-myristoylation rapidly and completely prevents rhinoviral replication without inducing cytotoxicity. The identification of cooperative binding between weak-binding fragments led to rapid inhibitor optimization through fragment reconstruction, structure-guided fragment linking and conformational control over linker geometry...
May 14, 2018: Nature Chemistry
https://www.readbyqxmd.com/read/29760145/-in-vitro-activity-of-imipenem-relebactam-and-ceftolozane-tazobactam-against-resistant-gram-negative-bacilli
#12
Suzannah M Schmidt-Malan, Avisya J Mishra, Ammara Mushtaq, Cassandra L Brinkman, Robin Patel
Understanding which antimicrobial agents are likely to be active against Gram-negative bacilli can guide selection of antimicrobials for empiric therapy as mechanistic-based (i.e., molecular) rapid diagnostics are adopted. Here, we determined the MICs of the novel β-lactam/β-lactamase inhibitor combination, imipenem-relebactam, along with ceftolozane-tazobactam, imipenem, ertapenem, meropenem, ceftriaxone, and cefepime, against 283 multidrug resistant isolates of Gram-negative bacilli. For isolates harboring bla KPC (n=111), the addition of relebactam to imipenem lowered the MIC50 /MIC90 from 16/>128 μg/ml for imipenem alone to 0...
May 14, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29756530/the-occurrence-of-spontaneous-cortical-spreading-depression-is-increased-by-blood-constituents-and-impairs-neurological-recovery-after-subdural-hematoma-in-rats
#13
Harald Krenzlin, Daniel Jussen, Michaela Maria Plath, Stephan Tretzel, Tobias Kraemer, Oliver Kempski, Beat Alessandri
Acute subdural haemorrhage (ASDH) is common and associated with severe morbidity and mortality. To date, the role of spontaneous cortical spreading depression (sCSD) in exaggerating secondary injury after ASDH, is poorly understood. The present study contains two experimental groups: First, we investigated and characterized the occurrence of sCSD after subdural blood infusion (300 µl) via tissue impedance (IMP) measurement in a rat model. Second, we compared the occurrence and influence of sCSD on lesion growth and neurological deficit in the presence and absence of whole blood constituents...
May 14, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29751279/inter-and-intra-species-variability-in-heat-resistance-and-the-effect-of-heat-treatment-intensity-on-subsequent-growth-of-byssochlamys-fulva-and-byssochlamys-nivea
#14
Juliana L P Santos, Simbarashe Samapundo, Sonay M Gülay, Jan Van Impe, Anderson S Sant'Ana, Frank Devlieghere
The major aims of this study were to assess inter- and intra-species variability of heat resistant moulds (HRMs), Byssochlamys fulva and Byssochlamys nivea, with regards to (i) heat resistance and (ii) effect of heat treatment intensity on subsequent outgrowth. Four-week-old ascospores were suspended in buffered glucose solution (13° Brix, pH 3.5) and heat treated in a thermal cycler adjusted at 85 °C, 90 °C and 93 °C. Two variants of the Weibull model were fitted to the survival data and the following inactivation parameters estimated: b (inactivation rate, min-1 ), n (curve shape) and δ (the time taken for first decimal reduction, min)...
April 21, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29750988/contribution-of-the-residue-at-position-4-within-classical-nuclear-localization-signals-to-modulating-interaction-with-importins-and-nuclear-targeting
#15
Kate M Smith, Veronica Di Antonio, Luca Bellucci, David R Thomas, Fabiana Caporuscio, Francesco Ciccarese, Hanieh Ghassabian, Kylie M Wagstaff, Jade K Forwood, David A Jans, Giorgio Palù, Gualtiero Alvisi
Nuclear import involves the recognition by importin (IMP) superfamily members of nuclear localization signals (NLSs) within protein cargoes destined for the nucleus, the best understood being recognition of classical NLSs (cNLSs) by the IMPα/β1 heterodimer. Although the cNLS consensus [K-(K/R)-X-(K/R) for positions P2-P5] is generally accepted, recent studies indicated that the contribution made by different residues at the P4 position can vary. Here, we apply a combination of microscopy, molecular dynamics, crystallography, in vitro binding, and bioinformatics approaches to show that the nature of residues at P4 indeed modulates cNLS function in the context of a prototypical Simian Virus 40 large tumor antigen-derived cNLS (KKRK, P2-5)...
May 8, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29750589/the-observed-variation-in-the-purine-composition-of-food-after-soaking-in-sake-lees
#16
F Takayanagi, T Fukuuchi, N Yamaoka, K Kaneko
In this study, we investigated the alterations in the purine composition of swordfish prepared using a traditional Japanese processing method of soaking in sake lees. These alterations are the byproducts of the yeast fermentation of rice-koji and are renowned for enhancing the umami nature of food. Using a conventional assay method for hydrolyzing all of the purines into four bases and our developed method for simultaneously analyzing purines, we observed the alterations in four purine bases in the soaked sake lees and swordfish...
May 11, 2018: Nucleosides, Nucleotides & Nucleic Acids
https://www.readbyqxmd.com/read/29748335/nuclear-transport-adapts-to-varying-heat-stress-in-a-multistep-mechanism
#17
Yutaka Ogawa, Naoko Imamoto
Appropriate cell growth conditions are limited to a narrow temperature range. Once the temperature is out of this range, cells respond to protect themselves, but temperature thresholds at which various intracellular responses occur, including nuclear transport systems, remain unclear. Using a newly developed precise temperature shift assay, we found that individual transport pathways have different sensitivities to a rise in temperature. Nuclear translocations of molecular chaperone HSP70s occur at a much lower temperature than the inhibition of Ran-dependent transport...
May 10, 2018: Journal of Cell Biology
https://www.readbyqxmd.com/read/29736175/the-roles-of-insulin-like-growth-factor-2-mrna-binding-protein-2-in-cancer-and-cancer-stem-cells
#18
REVIEW
Junguo Cao, Qingchun Mu, Haiyan Huang
RNA-binding proteins (RBPs) mediate the localization, stability, and translation of the target transcripts and fine-tune the physiological functions of the proteins encoded. The insulin-like growth factor (IGF) 2 mRNA-binding protein (IGF2BP, IMP) family comprises three RBPs, IGF2BP1, IGF2BP2, and IGF2BP3, capable of associating with IGF2 and other transcripts and mediating their processing. IGF2BP2 represents the least understood member of this family of RBPs; however, it has been reported to participate in a wide range of physiological processes, such as embryonic development, neuronal differentiation, and metabolism...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29731790/prevalence-of-clinically-isolated-metallo-beta-lactamase-producing-pseudomonas-aeruginosa-coding-genes-and-possible-risk-factors-in-iran
#19
REVIEW
Abdolmajid Ghasemian, Kobra Salimian Rizi, Hassan Rajabi Vardanjani, Farshad Nojoomi
Background & Objective: The spread of carbapenem-resistant Pseudomonas aeruginosa is a global concern. Metallo-beta-lactamase (MBL) enzymes cause extensive drug resistance among Gram-negative bacteria. The current study aimed at determining the prevalence of MBL-producing P. aeruginosa in Iran. Data extraction: A total of 43 studies were found out of which 36 were adopted. Data were collected from Google, Google Scholar, Science Direct, PubMed, Scopus, Embase, and Sciverse...
2018: Iranian Journal of Pathology
https://www.readbyqxmd.com/read/29714582/the-near-term-viability-and-benefits-of-elabels-for-patients-clinical-sites-and-sponsors
#20
Jodi Smith-Gick, Nicola Barnes, Rocco Barone, Jeff Bedford, Jason R James, Stacy Frankovitz Reisner, Michael Stephenson
BACKGROUND: Current clinical trial labels are designed primarily to meet regulatory requirements. These labels have low patient and site utility, few are opened, and they have limited space and small fonts. As our world transitions from paper to electronic, an opportunity exists to provide patients with information about their investigational clinical trial product in a way that is more easily accessible, meets Health Authority requirements, and provides valuable additional information for the patient and caregiver...
January 1, 2018: Therapeutic Innovation & Regulatory Science
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