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https://www.readbyqxmd.com/read/29453634/comparison-of-serological-and-molecular-typing-methods-for-epidemiological-investigation-of-tenacibaculum-species-pathogenic-for-fish
#1
Clara Fernández-Álvarez, Yolanda Torres-Corral, Ysabel Santos
In the present study, the potential of serological methods, the repetitive extragenic palindromic PCR (REP-PCR) and the enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR) for the typing of the species Tenacibaculum maritimum, Tenacibaculum soleae and Tenacibaculum discolor was evaluated. Moreover, molecular and proteomic techniques were used to assess variability among strains belonging to different serotypes, as well as isolated from different host species and geographical areas. Slide agglutination and dot-blot assays demonstrated the lack of immunological relationships among Tenacibaculum species analyzed...
February 16, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29451890/detection-of-bartonella-spp-in-fleas-by-maldi-tof-ms
#2
Basma El Hamzaoui, Maureen Laroche, Lionel Almeras, Jean Michel Bérenger, Didier Raoult, Philippe Parola
BACKGROUND: Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) has recently emerged in the field of entomology as a promising method for the identification of arthropods and the detection of associated pathogens. METHODOLOGY/PRINCIPAL FINDINGS: An experimental model of Ctenocephalides felis (cat fleas) infected with Bartonella quintana and Bartonella henselae was developed to evaluate the efficacy of MALDI-TOF MS in distinguishing infected from uninfected fleas, and its ability to distinguish fleas infected with Bartonella quintana from fleas infected with Bartonella henselae...
February 16, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29450654/visualizing-protoporphyrin-ix-formation-in-the-dura-tail-of-meningiomas-by-mass-spectrometry-imaging
#3
Benjamin Brokinkel, Sabrina Kröger, Volker Senner, Astrid Jeibmann, Uwe Karst, Walter Stummer
BACKGROUND: The advantages of 5-aminolevulinacid (5-ALA)-induced fluorescence-guided surgery in meningiomas are increasingly discussed. In this context, despite detectable tumor tissue in histopathologial analyses, no fluorescence was shown at the dura tail using the standard operating microscope. Thus, 5-ALA metabolism in this surgically important site remains unknown but needs to be elucidated when further evaluating indications of fluorescence-guided surgery in meningiomas. METHOD: We here present the spatially resolved identification of protoporphyrin IX (PpIX) in sphenoid ridge meningioma cryosections from a patient who underwent fluorescence-guided microsurgery using molecular imaging analysis by matrix-assisted laser desorption/ionization tandem mass spectrometry (MALDI-MS/MS)...
February 15, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29450143/purified-horse-milk-exosomes-contain-an-unpredictable-small-number-of-major-proteins
#4
Sergey E Sedykh, Lada V Purvinish, Artem S Monogarov, Evgeniya E Burkova, Alina E Grigor'eva, Dmitrii V Bulgakov, Pavel S Dmitrenok, Valentin V Vlassov, Elena I Ryabchikova, Georgy A Nevinsky
Exosomes are 40-100 nm nanovesicles containing RNA and different proteins. Exosomes containing proteins, lipids, mRNAs, and microRNAs are important in intracellular communication and immune function. Exosomes from different sources are usually obtained by combination of centrifugation and ultracentrifugation and according to published data can contain from a few dozens to thousands of different proteins. Crude exosome preparations from milk of eighteen horses were obtained for the first time using several standard centrifugations...
June 2017: Biochimie Open
https://www.readbyqxmd.com/read/29448650/synthesis-spectral-and-photophysical-properties-of-anthracene-substituted-phthalocyanines-a-study-as-polyurethane-electrospun-nanofibers
#5
Kyo-Sun Ku, Rangaraju Satish Kumar, Young-A Son
We have designed and synthesized novel symmetrical anthracene substituted zinc(II), copper(II), cobalt(II) and nickel(II) phthalocyanines (PC1, PC2, PC3 and PC4) in this work. For this synthesis, we started from base-catalysed aromatic displacement reaction of 4-nitrophthalonitrile with 9-hydroxyanthracene. The resulting four phthalocyanines (PCs) have been fully characterized by a series of spectroscopic methods including electronic absorption, elemental analysis, MALDI-TOF mass, and IR spectroscopy. The aggregation behavior of these PCs was investigated in different concentrations of chloroform solution...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29447904/intraspecific-venom-variation-in-southern-african-scorpion-species-of-the-genera-parabuthus-uroplectes-and-opistophthalmus-scorpiones-buthidae-scorpionidae
#6
Stephan Schaffrath, Lorenzo Prendini, Reinhard Predel
Scorpion venoms comprise cocktails of proteins, peptides, and other molecules used for immobilizing prey and deterring predators. The composition and efficacy of scorpion venoms appears to be taxon-specific due to a coevolutionary arms race with prey and predators that adapt at the molecular level. The taxon-specific components of scorpion venoms can be used as barcodes for species identification if the amount of intraspecific variation is low and the analytical method is fast, inexpensive and reliable. The present study assessed the extent of intraspecific variation in newly regenerated venom collected in the field from geographically separated populations of four southern African scorpion species: three buthids, Parabuthus granulatus (Ehrenberg, 1831), Uroplectes otjimbinguensis (Karsch, 1879), and Uroplectes planimanus (Karsch, 1879), and one scorpionid, Opistophthalmus carinatus (Peters, 1861)...
February 12, 2018: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29446650/methods-for-culturing-anaerobes-from-human-specimen
#7
Elodie Guilhot, Saber Khelaifia, Bernard La Scola, Didier Raoult, Grégory Dubourg
Anaerobes represent the dominating population in the human gut microbiota and play a key role in gut homeostasis. In addition, several anaerobes are now considered as probiotics and they remain essential to several processes in the field of biotechnology. With the implementation of MALDI-TOF MS in routine laboratories, anaerobes are no longer neglected in clinical microbiology, as their identification is made easy. However, the isolation and identification of anaerobic bacteria, remains time consuming, fastidious and costly...
February 15, 2018: Future Microbiology
https://www.readbyqxmd.com/read/29446487/tm2d3-rs675436-or-fgfr2-rs755793-polymorphisms-and-susceptibility-to-epstein-barr-virus-associated-tumors-in-chinese-han-population
#8
Qianqian Zhang, Wen Liu, Yang Yang, Zhenzhen Zhao, Bing Luo
BACKGROUND: Epstein-Barr virus (EBV) is etiologically linked to nasopharyngeal carcinoma, lymphoma and gastric carcinoma. The aim of this study was to assess the association of TM2 domain containing 3 (TM2D3) and fibroblast growth factor receptor 2 (FGFR2) SNPs rs675436 and rs755793 with susceptibility to EBV-associated tumors in Chinese Han population. MATERIALS AND METHODS: Genomic DNA of 415 patients with cancer and 99 healthy controls was assessed using a MALDI-TOF mass spectrometer, and was genotyped in EBV-associated/-negative gastric cancer (EBVa/nGC), EBV-associated/-negative nasopharyngeal carcinoma (EBVa/nNPC), EBV-associated/ -negative lymphoma (EBVa/nL) and normal controls (NC)...
February 15, 2018: Journal of Medical Virology
https://www.readbyqxmd.com/read/29445834/the-combination-of-2-5-dihydroxybenzoic-acid-and-2-5-dihydroxyacetophenone-matrices-for-unequivocal-assignment-of-phosphatidylethanolamine-species-in-complex-mixtures
#9
Jenny Schröter, Annabelle Fülöp, Carsten Hopf, Jürgen Schiller
Unequivocal assignment of phospholipid peaks in complex mixtures is difficult if only the m/z values but no tandem mass spectrometry (MS/MS) data are available. This is usually the case for matrix-assisted laser/desorption ionization time-of-flight (MALDI-TOF) MS imaging experiments and the analysis has normally to be performed without prior separation. Another problem might be the often matrix-induced loss of one methyl group in phosphatidylcholine (PC) species, which makes them detectable as negative ions becoming isomers of some phosphatidylethanolamines (PEs)...
February 14, 2018: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/29444410/enhanced-ion-transmission-efficiency-up-to-m-z-24-000-for-maldi-protein-imaging-mass-spectrometry
#10
Boone M Prentice, Daniel Ryan, Raf Van de Plas, Richard M Caprioli, Jeffrey M Spraggins
The molecular identification of species of interest is an important part of an imaging mass spectrometry (IMS) experiment. The high resolution accurate mass capabilities of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) have recently been shown to facilitate the identification of proteins in matrix-assisted laser desorption/ionization (MALDI) IMS. However, these experiments are typically limited to proteins giving rise to ions of relatively low m/z due to difficulties transmitting and measuring large molecular weight ions of low charge states...
February 14, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29444330/increased-species-assignment-of-filamentous-fungi-using-maldi-tof-ms-coupled-with-a-simplified-sample-processing-and-an-in-house-library
#11
M E Zvezdanova, P Escribano, A Ruiz, M C Martínez-Jiménez, T Peláez, A Collazos, J Guinea, E Bouza, B Rodríguez-Sánchez
In this study we evaluated the capacity of MALDI-TOF MS (Bruker Daltonics, Bremen, Germany) to identify clinical mould isolates. We focused on two aspects of MALDI-TOF MS identification: the sample processing and the database. Direct smearing of the sample was compared with a simplified processing consisting of mechanical lysis of the moulds followed by a protein extraction step. Both methods were applied to all isolates and the Filamentous Fungi Library 1.0 (Bruker Daltonics) was used for their identification...
February 9, 2018: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29442820/synthesis-optical-electrochemical-and-theoretical-studies-of-new-multicyclic-substituted-phthalocyanines
#12
Changkyeom Kim, Rangaraju Satish Kumar, Naveen Mergu, Kun Jun, Young-A Son
Here novel phenanthrenoxy and pyrenoxy substituted phthalocyanines were synthesized and fully characterized by general spectroscopic methods such as elemental analysis, 1H NMR, MALDI-TOF, FT-IR, UV-Visible absorption. The aggregation property of these phthalocyanines was investigated in CHCl3 and Triton X. Furthermore, electrochemical and DFT calculations were performed for these molecules.
May 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29442027/the-effect-of-slco1b1-polymorphism-on-the-pharmacokinetics-of-atorvastatin-and-2-hydroxyatorvastatin-in-healthy-chinese-people
#13
Yaqin Wang, Yingying Tian, Peiyu Lv, Lulu Chen, Wei Luo, Xian Jing, Hui Li, Zhirong Tan, Yicheng Wang, Honghao Zhou, Dong-Sheng Ouyang
The pharmacokinetics of statins show substantial inter-subject variability. Increasing systemic exposure of statins may lead to adverse drug reactions such as myopathy. The variation in statin pharmacokinetics is partly explained by genetic factors. OATP1B1, coded by SLCO1B1 transports a large number of therapeutic drugs, such as atorvastatin. Here we investigated the effect of SLCO1B1 polymorphism on the pharmacokinetics of atorvastatin and its metabolites. Two pharmacokinetic studies were conducted in Chinese Han volunteers and 132 volunteers were enrolled in our study as 72 in trial 1 and 60 in trial 2...
June 1, 2017: Die Pharmazie
https://www.readbyqxmd.com/read/29438850/secreted-protein-extract-analyses-present-the-plant-pathogen-alternaria-alternata-as-a-suitable-industrial-enzyme-toolbox
#14
L García-Calvo, R V Ullán, M Fernández-Aguado, A M García-Lino, R Balaña-Fouce, C Barreiro
Lignocellulosic plant biomass is the most abundant carbon source in the planet, which makes it a potential substrate for biorefinery. It consists of polysaccharides and other molecules with applications in pharmaceutical, food and feed, cosmetics, paper and textile industries. The exploitation of these resources requires the hydrolysis of the plant cell wall, which is a complex process. Aiming to discover novel fungal natural isolates with lignocellulolytic capacities, a screening for feruloyl esterase activity was performed in samples taken from different metal surfaces...
February 10, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29438398/proteomics-analysis-identified-peroxiredoxin-2-involved-in-early-phase-left-ventricular-impairment-in-hamsters-with-cardiomyopathy
#15
Kentaro Kuzuya, Sahoko Ichihara, Yuka Suzuki, Chisa Inoue, Gaku Ichihara, Syota Kurimoto, Shinji Oikawa
Given the hypothesis that inflammation plays a critical role in the progression of cardiovascular diseases, the aim of the present study was to identify new diagnostic and prognostic biomarkers of myocardial proteins involved in early-phase cardiac impairment, using proteomics analysis. Using the two-dimensional fluorescence difference gel electrophoresis (2D-DIGE) combined with MALDI-TOF/TOF tandem mass spectrometry, we compared differences in the expression of proteins in the whole left ventricles between control hamsters, dilated cardiomyopathic hamsters (TO-2), and hypertrophy cardiomyopathic hamsters (Bio14...
2018: PloS One
https://www.readbyqxmd.com/read/29437000/extraction-identification-and-biological-activities-of-saponins-in-sea-cucumber-pearsonothuria-graeffei
#16
Rafat Afifi Khattab, Mohamed Elbandy, Andrew Lawrence, Tim Paget, Jung Rae-Rho, Yaser S Binnaser, Imran Ali
AIM AND OBJECTIVE: Secondary metabolism in marine organisms produced a diversity of biological important natural compounds which are unpresented in terrestrial species. Sea cucumbers belong to the invertebrate Echinodermata and are famous for their nutraceutical, medical and food values. They are known for possession triterpenoid glycosides (saponins) with various ecological roles. The current work aimed to separate, identify and test various biological activities (anti-bacterial, antifungal, antileishmanial and anticancer properties) of saponins produced by the holothurian Pearsonothuria graeffei from the Red Sea, Egypt...
February 12, 2018: Combinatorial Chemistry & High Throughput Screening
https://www.readbyqxmd.com/read/29435544/intramolecular-singlet-fission-in-a-face-to-face-stacked-tetracene-trimer
#17
Xuemin Wang, Rui Wang, Li Shen, Zhaofeng Tang, Congying Wen, Bin Dong, Heyuan Liu, Chunfeng Zhang, Xiyou Li
A covalently linked tetracene trimer with a "face-to-face" stacked structure was prepared and its molecular structure is characterized by 1H NMR, MALDI-TOF mass spectroscopy, and elemental analysis. The minimized molecular structure reveals that three tetracene subunits within this trimer adopt a partially "face-to-face" stacked configuration. Its absorption spectrum differs significantly from that of the monomeric and dimeric counterparts in solution due to the strong ground state interactions between the neighboring tetracene subunits...
February 13, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29435100/complete-genome-sequence-of-pseudomonas-alcaliphila-jab1-dsm-26533-a-versatile-degrader-of-organic-pollutants
#18
Jakub Ridl, Jachym Suman, Serena Fraraccio, Miluse Hradilova, Michal Strejcek, Tomas Cajthaml, Andrea Zubrova, Tomas Macek, Hynek Strnad, Ondrej Uhlik
In this study, following its isolation from contaminated soil, the genomic sequence of Pseudomonas alcaliphila strain JAB1 (=DSM 26533), a biphenyl-degrading bacterium, is reported and analyzed in relation to its extensive degradative capabilities. The P. alcaliphila JAB1 genome (GenBank accession no. CP016162) consists of a single 5.34 Mbp-long chromosome with a GC content of 62.5%. Gene function was assigned to 3816 of the 4908 predicted genes. The genome harbors a bph gene cluster, permitting degradation of biphenyl and many congeners of polychlorinated biphenyls (PCBs), a ben gene cluster, enabling benzoate and its derivatives to be degraded, and phe gene cluster, which permits phenol degradation...
2018: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/29434110/detection-and-quantification-of-4-methylimidazole-in-cola-by-matrix-assisted-laser-desorption-ionization-mass-spectrometry-with-fe2o3-nanoparticles-on-zeolite
#19
Yosuke Fujii, Yuqi Ding, Taichi Umezawa, Takafumi Akimoto, Jiawei Xu, Takashi Uchida, Tatsuya Fujino
Food additives generally used in carbonated drinks, such as 4-methylimidazole (4MI), caffeine (Caf?), citric acid (CA), and aspartame (Apm), were measured by matrix-assisted laser desorption ionization mass spectrometry (MALDI MS) using nanometer-sized particles of iron oxide (Fe2O3 NPs). The quantification of 4MI in Coca Cola (C-cola) was carried out. In order to improve the reproducibility of the peak intensities, Fe2O3 NPs loaded on ZSM5 zeolite were used as the matrix for quantification. By using 2-ethylimidazole (2EI) as the internal standard, the amount of 4MI in C-cola was determined to range from 88 to 65 μg/355 mL...
2018: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/29434070/direct-identification-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-from-positive-blood-culture-bottles-an-opportunity-to-customize-growth-conditions-for-fastidious-organisms-causing-bloodstream-infections
#20
Megha Sharma, Vikas Gautam, Monika Mahajan, Sudesh Rana, Manasi Majumdar, Pallab Ray
Culture-negative bacteraemia has been an enigmatic entity with respect to its aetiological agents. In an attempt to actively identify those positive blood cultures that escape isolation and detection on routine workflow, an additional step of MALDI-TOF MS (matrix-assisted laser desorption ionization-time of flight mass spectrometry) based detection was carried out directly from the flagged blood culture bottles. Blood samples from 200 blood culture bottles that beeped positive with automated (BACTEC) system and showed no growth of organism on routine culture media, were subjected to analysis by MALDI-TOF MS...
October 2017: Indian Journal of Medical Research
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