keyword
MENU ▼
Read by QxMD icon Read
search

MALDI

keyword
https://www.readbyqxmd.com/read/28105855/analysis-of-a549-cell-proteome-alteration-in-response-to-recombinant-influenza-a-virus-nucleoprotein-and-its-interaction-with-cellular-proteins-a-preliminary-study
#1
D Kumar, K Tiwari, M S Rajala
 Influenza A virus undergoes frequent changes of antigenicity and contributes to seasonal epidemics or unpredictable pandemics. Nucleoprotein, encoded by gene segment 5, is an internal protein of the virus and is conserved among strains of different host origins. In the current study, we analyzed the differentially expressed proteins in A549 cells transiently transfected with the recombinant nucleoprotein of influenza A virus by 2D gel electrophoresis. The resolved protein spots on gel were identified by MALDI-TOF/Mass spectrometry analysis...
January 19, 2017: Acta Virologica
https://www.readbyqxmd.com/read/28102393/chemically-reversible-binding-of-h2s-to-a-zinc-porphyrin-complex-towards-implementation-of-a-reversible-sensor-via-a-coordinative-based-approach
#2
Maria Strianese, Marina Lamberti, Claudio Pellecchia
Binding of hydrogen sulfide (H2S) to a zinc porphyrin complex and the stabilization of the related zinc hydrosulfido adduct are explored. High-resolution MALDI Fourier transform ion cyclotron resonance mass spectrometry (HR MALDI-FT-ICR) and (1)H NMR experiments provide evidence that HS(-) coordination occurs at the zinc centre. The coordination of HS(-) occurs in a reversible manner and modulates fluorescence emission of a tetra(N-methylpyridyl)porphine zinc complex (TMPyPZn). The results highlight the potential of TMPyPZn and related systems for the implementation of fast and simple H2S sensors via a coordinative-based approach...
January 19, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28102381/maldi-imaging-enables-direct-observation-of-kinetic-and-thermodynamic-products-of-mixed-peptide-fiber-assembly
#3
Karima Medini, Brandi West, David E Williams, Margaret A Brimble, Juliet A Gerrard
Controlling the self-assembly of multicomponent systems provides a key to designing new materials and understanding the molecular complexity of biology. Here, we demonstrate the first use of MALDI-imaging to characterize a multicomponent self-assembling peptide fiber. Observations of mixed peptide systems over time demonstrate how simple sequence variation can change the balance between kinetic and thermodynamic products.
January 19, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28101334/implementation-of-short-incubation-maldi-tof-ms-identification-from-positive-blood-cultures-in-routine-diagnostics-and-effects-on-empiric-antimicrobial-therapy
#4
Robin Köck, Jörg Wüllenweber, Dagmar Horn, Christian Lanckohr, Karsten Becker, Evgeny A Idelevich
BACKGROUND: Results of blood culture (BC) diagnostics should be swiftly available to guide treatment of critically ill patients. Conventional BC diagnostics usually performs species identification of microorganisms from mature solid medium colonies. Species identification might be speed up by using matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) of biomass from shortly incubated solid media. METHODS: This single-center analysis compared the applicability of MALDI-TOF-based species identification from shortly incubated cultures in laboratory routine vs...
2017: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/28101252/identification-of-proteins-from-wild-cardoon-flowers-cynara-cardunculus-l-by-a-proteomic-approach
#5
Amal Ben Amira, Julien Bauwens, Edwin De Pauw, Souhail Besbes, Hamadi Attia, Frédéric Francis, Christophe Blecker
Proteomic approach was applied to identify total proteins, particularly the enzymatic content, from wild cardoon flowers. As the selection of an appropriate sample preparation method is the key for getting reliable results, two different extraction/precipitation methods (trichloroacetic acid and phenol/ammonium acetate) were tested on fresh and lyophilized flowers. After two-dimensional electrophoresis (2D-E) separations, a better protein pattern was obtained after phenol extraction from lyophilized flowers...
January 2017: Journal of Chemical Biology
https://www.readbyqxmd.com/read/28100598/molecular-and-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-characterization-of-clinically-significant-melanized-fungi-in-india
#6
Ashutosh Singh, Pradeep Kumar Singh, Anil Kumar, Jagdish Chander, Geetika Khanna, Pradip Roy, Jacques F Meis, Anuradha Chowdhary
Melanized or black fungi are a heterogeneous group of fungi causing cutaneous to systemic diseases with high mortality. These fungi are rarely reported as agent of human infections primarily due to difficulties in their classical identification. In this study we examined using molecular methods and MALDI-TOF MS the diversity of melanized fungi (MF) isolated from patients in 19 medical centers in India. Overall, during a 4-year period, 718 (5.3%) clinical specimens yielded MF. Of these, 72 (10%) isolates had clinical significance and were identified primarily by sequencing the ITS and LSU regions...
January 18, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28100314/matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-for-rapid-identification-of-fungal-rhinosinusitis-pathogens
#7
Xinxin Lu, Yanfei Huang, Mingxin Zhang, Min Zhu, Mei Wang, Yufeng Sun, Haitong Gu, Jingjing Cao, Xue Li, Shaoya Zhang, Jinglin Wang
BACKGROUND: filamentous fungi are the most important pathogens causing fungal rhinosinusitis (FRS). Current laboratory diagnosis of FRS pathogens mainly relies on phenotypic identification by culture and microscopic examination, which is time-consuming and expertise-dependent. Although matrix -assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) has been employed to identify various fungi, its performance for the identification of FRS fungi is less clear...
January 17, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28100271/evaluation-of-three-sample-preparation-methods-for-the-direct-identification-of-bacteria-in-positive-blood-cultures-by-maldi-tof
#8
Hannah Tanner, Jason T Evans, Savita Gossain, Abid Hussain
BACKGROUND: Patient mortality is significantly reduced by rapid identification of bacteria from sterile sites. MALDI-TOF can identify bacteria directly from positive blood cultures and multiple sample preparation methods are available. We evaluated three sample preparation methods and two MALDI-TOF score cut-off values. Positive blood culture bottles with organisms present in Gram stains were prospectively analysed by MALDI-TOF. Three lysis reagents (Saponin, SDS, and SepsiTyper lysis bufer) were applied to each positive culture followed by centrifugation, washing and protein extraction steps...
January 18, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28099490/correction-rapid-classification-and-identification-of-microcystis-aeruginosa-strains-using-maldi-tof-ms-and-polygenetic-analysis
#9
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0156275.].
2017: PloS One
https://www.readbyqxmd.com/read/28098943/a-survey-of-the-peptide-profile-in-prato-cheese-as-measured-by-maldi-ms-and-capillary-electrophoresis
#10
Débora Parra Baptista, Francisca Diana da Silva Araújo, Marcos Nogueira Eberlin, Mirna Lúcia Gigante
In this study, we describe the characterization of the peptide profile in commercial Prato cheese by matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) and capillary electrophoresis (CE). Ten commercial Prato cheese brands were characterized via their physicochemical composition and subjected to fractionation according to solubility at pH 4.6. The pH 4.6 insoluble fraction was evaluated by CE, whereas MALDI-MS was applied to the fraction soluble at pH 4.6 and in 70% ethanol. CE revealed a characteristic pattern of hydrolysis, with formation of para-κ-casein, hydrolysis of αs1 -casein at the Phe23 - Phe24 bond, and hydrolysis of β-casein...
January 18, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28098550/determination-of-elizabethkingia-diversity-by-maldi-tof-mass-spectrometry-and-whole-genome-sequencing
#11
Helle Brander Eriksen, Heidi Gumpert, Cecilie Haase Faurholt, Henrik Westh
In a hospital-acquired infection with multidrug-resistant Elizabethkingia, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and 16S rRNA gene analysis identified the pathogen as Elizabethkingia miricola. Whole-genome sequencing, genus-level core genome analysis, and in silico DNA-DNA hybridization of 35 Elizabethkingia strains indicated that the species taxonomy should be further explored.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28098340/inhibitory-effect-of-blue-light-emitting-diode-on-migration-and-invasion-of-cancer-cells
#12
Phil-Sun Oh, Hyun-Soo Kim, Eun-Mi Kim, Hyosook Hwang, Hyang Hwa Ryu, SeokTae Lim, Myung-Hee Sohn, Hwan-Jeong Jeong
The aim of this study was to determine the effects and molecular mechanism of blue light emitting diode (LED) in tumor cells. A migration and invasion assay for the metastatic behavior of mouse colon cancer CT-26 and human fibrosarcoma HT-1080 cells was performed. Cancer cell migration-related proteins were identified by obtaining a 2-dimensional gel electrophoresis (2-DE) in total cellular protein profile of blue LED-irradiated cancer cells, followed by matrix-assisted laser desorption/ionization-time of flight (MALDI-TOF) analysis of proteins...
January 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28097087/identification-of-the-vascular-endothelial-growth-factor-signalling-pathway-by-quantitative-proteomic-analysis-of-rat-condylar-cartilage
#13
Liting Jiang, Yinyin Xie, Li Wei, Qi Zhou, Xing Shen, Xinquan Jiang, Yiming Gao
Angiogenesis mediated by vascular endothelial growth factor (VEGF) is known to play an important role in regulating cartilage remodelling and endochondral ossification. However, the details of how VEGF signalling mechanisms affect condyle remodelling in response to alterations in functional loading remains unclear. To explore this, eighty 16-day-old male SD rats were divided into two equal groups which were fed either a soft/powdery diet or a hard diet for 4 weeks; the stiffness of the diet results in alteration of mastication force and hence temporomandibular joint (TMJ) development...
January 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28095078/diagnosis-classification-and-therapeutic-interventions-for-sinopulmonary-aspergillosis
#14
Matthew William McCarthy, Daniel Aguilar-Zapata, Vidmantas Petraitis, Thomas J Walsh
Sinopulmonary aspergillosis represents a diverse collection of allergic, invasive, and chronic sinus and respiratory conditions. These diseases can affect patients with and without immune impairment and in some cases may be life-threatening. Areas Covered: We review the diagnosis, classification, and therapeutic options available to treat sinopulmonary aspergillosis and look ahead to emerging diagnostic and therapeutic options that may soon play an important role in clinical practice. Expert Commentary: Histopathology and tissue culture remain the gold standard for the diagnosis of invasive sinopulmonary aspergillosis, but several new molecular detection methods have recently emerged, including various PCR-based platforms, MALDI-TOF, and lateral flow assays...
January 17, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28094470/mechanistic-studies-of-dmap-initiated-cyclohexene-oxide-co2-copolymerization-by-a-chromium-iii-pyridylamine-bis-phenolate-complex
#15
Christopher Mark Kozak, Katalin Devaine-Pressing
Chromium(III) chlorido amine-bis(phenolate) complexes paired with nucleophilic co-catalysts are a promising family of catalysts for the copolymerization of CO2 and epoxides to selectively produce polycarbonates with a very high degree of carbonate linkages. Single component catalyst systems can be prepared, where the neutral nucleophile, 4-dimethylaminopyridine (DMAP), is coordinated to the metal site to provide a stable octahedral CrIII complex. These complexes possess the potentional for both anionic (from the chlorido ligand) or neutral (DMAP) nucleophilic epoxide ring-opening during the proposed rate-determining initation step...
January 17, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28094091/can-maldi-tof-mass-spectrometry-reasonably-type-bacteria
#16
REVIEW
Marlène Sauget, Benoît Valot, Xavier Bertrand, Didier Hocquet
Bacterial typing is crucial to tackle the spread of bacterial pathogens but current methods are time-consuming and costly. Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has been recently integrated into the microbiology laboratory workflow for a quick and low-cost microbial species identification. Independent research groups have successfully redirected the original function of this technology from their primary purpose to discriminate subgroups within pathogen species...
January 13, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28093322/anti-pathogenic-and-probiotic-attributes-of-lactobacillus-salivarius-and-lactobacillus-plantarum-strains-isolated-from-feces-of-algerian-infants-and-adults
#17
Hamza Ait Seddik, Farida Bendali, Benoit Cudennec, Djamel Drider
Sixty-seven (67) lactic acid bacteria (LAB) isolates belonging to Lactobacillus genus were isolated from human feces and tested for their auto-aggregation and cell surface hydrophobicity in order to establish their adhesion capabilities, a prerequisite for probiotic selection. Strains with the upmost auto-aggregation and cell surface hydrophobicity scores were identified by MALDI-TOF spectrometry and 16S rDNA sequencing as Lactobacillus plantarum (p25lb1 and p98lb1) and Lactobacillus salivarius (p85lb1 and p104lb1)...
January 13, 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28092721/use-of-maldi-tof-mass-spectrometry-in-the-battle-against-bacterial-infectious-diseases-recent-achievements-and-future-perspectives
#18
Vassilios Sandalakis, Ioannis Goniotakis, Iosif Vranakis, Dimosthenis Chochlakis, Anna Psaroulaki
Advancements in microbial identification occur increasingly faster as more laboratories explore, refine and extend the use of mass spectrometry in the field of microbiology. Areas covered: This review covers the latest knowledge found in the literature for quick identification of various classes of bacterial pathogens known to cause human infection by the use of MALDI-TOF MS technology. Except for identification of bacterial strains, more researchers try to "battle time" in favor of the patient. These novel approaches to identify bacteria directly from clinical samples and even determine antibiotic resistance are extensively revised and discussed...
January 16, 2017: Expert Review of Proteomics
https://www.readbyqxmd.com/read/28091899/proteomic-study-of-blood-serum-in-coronary-atherosclerosis
#19
E M Stakhneva, I A Meshcheryakova, E A Demidov, K V Starostin, Yu I Ragino, S E Peltek, M I Voevoda
Changes in the blood serum proteins were assessed in men with coronary atherosclerosis and without coronary heart disease. Proteins were separated by 2D-electrophoresis, protein fractions were identified by their peptide fingerprint by MALDI method; fractions with more than twofold increase in protein level were determined. In blood serum of patients with coronary atherosclerosis, the content of C4 complement protein increased and ceruloplasmin level decreased, which is typical of heart failure and coronary heart disease...
January 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28091797/mass-spectrometric-identification-of-phenol-soluble-modulins-in-the-atcc%C3%A2-43300-standard-strain-of-methicillin-resistant-staphylococcus-aureus-harboring-two-distinct-phenotypes
#20
K S Jang, M Park, J Y Lee, J S Kim
Staphylococcus aureus subsp. aureus Rosenbach (ATCC® 43300™) is a representative methicillin-resistant S. aureus (MRSA) strain that is used as a quality control strain for testing the methicillin susceptibility of clinical isolates. It has been consistently observed that colonies with two different colors (golden yellow and white) grow from the ATCC stock on blood agar plates. In this study, staphylococcal peptide and protein profiling was performed using matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry...
January 14, 2017: European Journal of Clinical Microbiology & Infectious Diseases
keyword
keyword
9717
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"