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Clifton K Fagerquist et al.
Journal of biomedicine & biotechnology, 2010, 123460-123460 (2011-02-19)
A method has been developed to identify the α-subunit of Shiga toxin 2 (α-Stx2) from Escherichia coli O157:H7 using matrix-assisted laser desorption/ionization time-of-flight-time-of-flight tandem mass spectrometry (MALDI-TOF-TOF-MS/MS) and top-down proteomics using web-based software developed in-house. Expression of Stx2 was induced
Beat Alessandri et al.
Journal of neurotrauma, 29(12), 2181-2191 (2012-08-15)
For many years lactate was considered to be a waste product of glycolysis. Data are accumulating that suggest that lactate is an important energy substrate for neurons during activation. In severe traumatic brain injury (TBI) glutamate release and ischemic cerebral
A Yaromina et al.
Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al], 188(5), 431-437 (2012-02-22)
High pretreatment tumor lactate content is associated with poor outcome after fractionated irradiation in human squamous cell carcinoma (hSCC) xenografts. Therefore, decreasing lactate content might be a promising approach for increasing tumor radiosensitivity. As the basis for such experiments, the
Clifton K Fagerquist et al.
Journal of the American Society for Mass Spectrometry, 23(12), 2102-2114 (2012-10-12)
We previously reported the apparent formation of matrix adducts of 3,5-dimethoxy-4-hydroxy-cinnamic acid (sinapinic acid or SA) via covalent attachment to disulfide bond-containing proteins (HdeA, Hde, and YbgS) from bacterial cell lysates ionized by matrix-assisted laser desorption/ionization (MALDI) time-of-flight-time-of-flight tandem mass
J Xu et al.
Cell death & disease, 6, e1616-e1616 (2015-01-23)
The selenoprotein thioredoxin reductase 1 (TrxR1) has several key roles in cellular redox systems and reductive pathways. Here we discovered that an evolutionarily conserved and surface-exposed tryptophan residue of the enzyme (Trp114) is excessively reactive to oxidation and exerts regulatory
Rafael Tapia-Limonchi et al.
Islets, 6(5-6), e995997-e995997 (2015-02-07)
Homeostatic levels of nitric oxide (NO) protect efficiently against apoptotic death in both human and rodent pancreatic β cells, but the protein profile of this action remains to be determined. We have applied a 2 dimensional LC-MS-MALDI-TOF/TOF-based analysis to study
Yuko Fukuyama et al.
Rapid communications in mass spectrometry : RCM, 26(20), 2454-2460 (2012-09-15)
A liquid matrix, 3-aminoquinoline (3-AQ)/α-cyano-4-hydroxycinnamic acid (CHCA), introduced by Kolli et al. in 1996 for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), has been reported for peptides and proteins, oligonucleotides, oligosaccharides, and glycopeptides. However, it has not been validated for phosphopeptides.
H Ando et al.
Journal of applied microbiology, 118(4), 873-880 (2015-01-30)
To evaluate the antimicrobial properties of the main Ginjo-flavour components of sake, volatile isoamyl acetate and isoamyl alcohol. Volatile isoamyl acetate and isoamyl alcohol both inhibited growth of the five yeast and 10 bacterial test strains. The minimum inhibitory dose
Svend Dam et al.
Plant physiology, 149(3), 1325-1340 (2009-01-09)
We have characterized the development of seeds in the model legume Lotus japonicus. Like soybean (Glycine max) and pea (Pisum sativum), Lotus develops straight seed pods and each pod contains approximately 20 seeds that reach maturity within 40 days. Histological
Jan Gorka et al.
Journal of the American Society for Mass Spectrometry, 23(11), 1949-1954 (2012-09-21)
Graphite as MALDI matrix or in combination with other substances has been reported in recent years. Here, we demonstrate that graphite can be used as target coating supporting the crystallization of the α-cyano-4-hydroxycinnamic acid matrix. A conventional dried-droplet preparation of
Catarina Carneiro et al.
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 89, 190-200 (2014-12-17)
We describe the preparation and characterization of DODAB:MO-based liposomes and demonstrate their adjuvant potential and use in antigen delivery. Liposomes loaded with Candida albicans proteins assembled as stable negatively charged spherical nanoparticles with a mean size of 280 nm. High
Jeong Hee Moon et al.
Journal of the American Society for Mass Spectrometry, 23(1), 162-170 (2011-11-04)
Preformed ion emission is the main assumption in one of the prevailing theories for peptide and protein ion formation in matrix-assisted laser desorption ionization (MALDI). Since salts are in preformed ion forms in the matrix-analyte mixture, they are ideal systems
Jens Soltwisch et al.
Analytical chemistry, 84(15), 6567-6576 (2012-07-19)
The laser wavelength constitutes a key parameter in ultraviolet-matrix-assisted laser desorption ionization-mass spectrometry (UV-MALDI-MS). Optimal analytical results are only achieved at laser wavelengths that correspond to a high optical absorption of the matrix. In the presented work, the wavelength dependence
Yuko Fukuyama et al.
Analytical chemistry, 84(9), 4237-4243 (2012-04-18)
Hydrophobic peptides are generally difficult to detect using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) because the majority of MALDI matrixes are hydrophilic and therefore have a low affinity for hydrophobic peptides. Here, we report on a novel matrix additive, o-alkylated
Xiangping Zhu et al.
Journal of biomolecular techniques : JBT, 14(4), 298-307 (2004-01-13)
Alpha-cyano-4-hydroxycinnamic acid (alpha-CHCA) as a matrix facilitates the ionization of proteins and peptides in a matrix-assisted laser desorption/ionization (MALDI) time-of-flight (TOF) mass spectrometer. The matrix itself also ionizes and so do its sodium and potassium adducts. Matrix clusters and metal
Kaoru Kaneshiro et al.
Analytical chemistry, 84(16), 7146-7151 (2012-07-27)
Protein glycosylation is a crucial phenomenon for understanding protein functions, since its patterns and degree are associated with many biological processes, such as intercellular signaling and immune response. We previously reported a novel glycan-labeling method using a 3-ainoquinoline/α-cyano-4-hydroxycinnamic acid (3-AQ/CHCA)
Hophil Min et al.
Molecules and cells, 37(6), 457-466 (2014-05-09)
Proteomic analysis is helpful in identifying cancer-associated proteins that are differentially expressed and fragmented that can be annotated as dysregulated networks and pathways during metastasis. To examine meta-static process in lung cancer, we performed a proteomics study by label-free quantitative
Anne R Diers et al.
The Biochemical journal, 444(3), 561-571 (2012-03-31)
Recent studies have highlighted the fact that cancer cells have an altered metabolic phenotype, and this metabolic reprogramming is required to drive the biosynthesis pathways necessary for rapid replication and proliferation. Specifically, the importance of citric acid cycle-generated intermediates in
Nida Zaidi et al.
The journal of physical chemistry. B, 118(46), 13025-13036 (2014-10-23)
Sodium dodecyl sulfate (SDS)-glycoprotein interaction serves as a model for a biological membrane. To get mechanistic insight into the interaction of SDS and glycoprotein, the effect of SDS on bovine serum fetuin (BSF) was studied in subcritical micellar concentrations at
Lucile E Wrenshall et al.
PloS one, 9(7), e102191-e102191 (2014-07-16)
Interleukin-2 (IL-2) is a multi-faceted cytokine, known for promoting proliferation, survival, and cell death depending on the cell type and state. For example, IL-2 facilitates cell death only in activated T cells when antigen and IL-2 are abundant. The availability
Maria Stella Ritorto et al.
Nature communications, 5, 4763-4763 (2014-08-28)
Deubiquitylases (DUBs) are key regulators of the ubiquitin system which cleave ubiquitin moieties from proteins and polyubiquitin chains. Several DUBs have been implicated in various diseases and are attractive drug targets. We have developed a sensitive and fast assay to
Des Field et al.
Applied and environmental microbiology, 81(8), 2762-2769 (2015-02-11)
The food-borne pathogenic bacterium Listeria is known for relatively low morbidity and high mortality rates, reaching up to 25 to 30%. Listeria is a hardy organism, and its control in foods represents a significant challenge. Many naturally occurring compounds, including
Li Lin et al.
Dalton transactions (Cambridge, England : 2003), 44(12), 5867-5874 (2015-02-27)
A zinc phthalocyanine (ZnPc) derivative (Zn-tri-PcNc-8) containing tri-benzonaphtho-condensed porphyrazine with one carboxylic and six diphenylphenoxy peripheral substitutions was designed and synthesized as a sensitizer for dye-sensitized solar cells (DSSCs). For the purpose of extending the absorption spectra while minimizing the
Yu-Shu Huang et al.
Food chemistry, 174, 571-576 (2014-12-23)
Curcumin is the major active ingredient of turmeric and is widely used as a preservative, flavouring and colouring agent. Curcumin is a potent substance with several functions, including antioxidant, antitumor, anti-inflammatory, antimicrobial, antiparasitic, antimutagenic, chemopreventive and chemotherapeutic activities. Matrix-assisted laser
Sirantha Perera et al.
Rapid communications in mass spectrometry : RCM, 26(7), 853-862 (2012-03-01)
Solid phase microextraction (SPME) use small fibers directly plunged in the solution under investigation to quickly extract and quantify by different techniques the amount of selected dissolved compounds. Biological materials, peptides or proteins are accurately identified by matrix-assisted laser desorption/ionization
Ayodele Alaiya et al.
Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association, 30(1), 62-70 (2014-06-11)
There have been several attempts to standardize the definition and increase reproducibility in classifying lupus nephritis (LN). The last was made by the International Society of Nephrology and Renal Pathology Society in 2003 where the introduction of Class IV subcategories
Ju-Yeon Moon et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 29(3), 345-351 (2013-03-12)
As a simple and rapid method for small-molecule analysis, matrix-assisted laser desorption ionization coupled with linear ion-trap tandem mass spectrometry (MALDI-LTQ-MS/MS) was used to differentially quantify 2- and 4-methoxyestrogens in spiked serum samples. Both 2- and 4-methoxyestrogens were consistently identified
Adriana Calderaro et al.
Scientific reports, 4, 6803-6803 (2014-10-31)
Virus detection and/or identification traditionally rely on methods based on cell culture, electron microscopy and antigen or nucleic acid detection. These techniques are good, but often expensive and/or time-consuming; furthermore, they not always lead to virus identification at the species
Tonio Oumeraci et al.
PloS one, 10(2), e0117144-e0117144 (2015-02-11)
Pseudomonas aeruginosa is a gram-negative bacterium that is ubiquitously present in the aerobic biosphere. As an antibiotic-resistant facultative pathogen, it is a major cause of hospital-acquired infections. Its rapid and accurate identification is crucial in clinical and therapeutic environments. In
Liz O'Donovan et al.
Nucleic acid therapeutics, 25(1), 1-10 (2014-11-21)
We describe two new methods of parallel chemical synthesis of libraries of peptide conjugates of phosphorodiamidate morpholino oligonucleotide (PMO) cargoes on a scale suitable for cell screening prior to in vivo analysis for therapeutic development. The methods represent an extension
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