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... Earthworm metabolism is recognized as a useful tool for monitoring environmental insults and measuring ecotoxicity, yet extensive earthworm metabolic profiling using ¹H nuclear magnetic resonance (NMR) spectroscopy has been limited in scope. This study aims to expand the embedded metabolic material in earthworm coelomic fluid, coelomocytes, and tissue to aid systems toxicology research. Fifty-nine ...
... This report describes the application of NMR spectroscopy to the profiling of metabolites in bronchoalveolar lavage fluid (BALf) of lung transplant recipients without bronchiolitis obliterans syndrome (BOS) (stable, S, n = 10), and with BOS at different degrees of severity (BOS 0p, n = 10; BOS I, n = 10). Through the fine-tuning of a number of parameters concerning both sample preparation/processi ...
... Quorum sensing (QS) is a process of bacterial communication that has been a novel target for drug discovery. Pyocyanin quantification assay confirmed that resveratrol was an effective quorum sensing inhibitor (QSI) against Pseudomonas aeruginosa PAO1. In this study, the global metabolite changes of P. aeruginosa PAO1 exposed to QSI resveratrol were investigated by ¹H NMR spectroscopy. A total of 4 ...
... Metabolomics profiling and bioinformatics technologies were used to determine the relationship between exercise-induced increases in IL-6 and lipid-related metabolites. Twenty-four male runners (age 36.5 ± 1.8 y) ran on treadmills to exhaustion (2.26 ± 0.01 h, 24.9 ± 1.3 km, 69.7 ± 1.9% VO₂ₘₐₓ). Vastus lateralis muscle biopsy and blood samples were collected before and immediately after running an ...
computer software; data collection; liquid chromatography; proteins; proteome; statistical analysis; tandem mass spectrometry; uncertainty
Abstract:
... Detection of differentially abundant proteins in label-free quantitative shotgun liquid chromatography–tandem mass spectrometry (LC–MS/MS) experiments requires a series of computational steps that identify and quantify LC–MS features. It also requires statistical analyses that distinguish systematic changes in abundance between conditions from artifacts of biological and technical variation. The 2 ...
alpha-casein; amino acid composition; beta-casein; bioactive properties; breast milk; cattle; infant formulas; kappa-casein; lactation; protein content; proteome; quantitative analysis; regression analysis; whey; whey protein
Abstract:
... Whey proteins and caseins in breast milk provide bioactivities and also have different amino acid composition. Accurate determination of these two major protein classes provides a better understanding of human milk composition and function, and further aids in developing improved infant formulas based on bovine whey proteins and caseins. In this study, we implemented a LC-MS/MS quantitative analys ...
Escherichia coli; chemical structure; databases; metabolites; metabolomics; models; nuclear magnetic resonance spectroscopy; proteome; tandem mass spectrometry
Abstract:
... Metabolite identification in metabolomics samples is a key step that critically impacts downstream analysis. We recently introduced the SUMMIT NMR/mass spectrometry (MS) hybrid approach for the identification of the molecular structure of unknown metabolites based on the combination of NMR, MS, and combinatorial cheminformatics. Here, we demonstrate the feasibility of the approach for an untargete ...
... The usage of strong cation exchange (SCX) chromatography in proteomics is limited by its poor resolution and nonspecific hydrophobic interactions with peptides, which lead to peptide overlap across fractions and change of peptide retention, respectively. The application of high concentration of salt (up to 1000 mM) in SCX also restricted its use in online 2D SCX-RP LC. In the present research, we ...
... Here we report the first demonstration of near-complete sequence coverage of intact proteins using activated ion-electron transfer dissociation (AI-ETD), a method that leverages concurrent infrared photoactivation to enhance electron-driven dissociation. AI-ETD produces mainly c/z-type product ions and provides comprehensive (77–97%) protein sequence coverage, outperforming HCD, ETD, and EThcD for ...
asthma; eosinophils; flow cytometry; granulocyte-macrophage colony-stimulating factor; humans; interleukin-3; interleukin-5; mass spectrometry; multivariate analysis; phosphoproteins; phosphorylation; protein synthesis; proteome; proteomics; signal transduction; two-dimensional gel electrophoresis
Abstract:
... Activated eosinophils contribute to airway dysfunction and tissue remodeling in asthma and thus are considered to be important factors in asthma pathology. We report here comparative proteomic and phosphoproteomic changes upon activation of eosinophils using eight cytokines individually and in selected cytokine combinations in time-course reactions. Differential protein and phosphoprotein expressi ...
Ostertag Luisa M.; Philo Mark; Colquhoun Ian J.; Tapp Henri S.; Saha Shikha; Duthie Garry G.; Kemsley E. Kate; de Roos Baukje; Kroon Paul A.; Le Gall Gwénaëlle
acute effects; amino acids; blood plasma; creatinine; flavanols; human health; humans; lactic acid; metabolism; metabolites; metabolome; metabolomics; multivariate analysis; nuclear magnetic resonance spectroscopy; proteome; pyruvic acid; risk; urine; white chocolate
Abstract:
... Flavan-3-ols and methylxanthines have potential beneficial effects on human health including reducing cardiovascular risk. We performed a randomized controlled crossover intervention trial to assess the acute effects of consumption of flavan-3-ol-enriched dark chocolate, compared with standard dark chocolate and white chocolate, on the human metabolome. We assessed the metabolome in urine and bloo ...
computer software; data collection; fibroblasts; humans; mass spectrometry; proteins; proteome; proteomics; spectrometers
Abstract:
... Over the past decade, developments in high resolution mass spectrometry have enabled the high throughput analysis of intact proteins from complex proteomes, leading to the identification of thousands of proteoforms. Several previous reports on top-down proteomics (TDP) relied on hybrid ion trap–Fourier transform mass spectrometers combined with data-dependent acquisition strategies. To further red ...
... Aggregatibacter actinomycetemcomitans (Aa) is a pathogenic bacterium residing in the subgingival plaque biofilm strongly associated with the pathogenesis of periodontitis. The aim of this investigation was to study the protein differential expression of Aa when growing on biofilm compared with planktonic state using proteomic analysis by the 2D-DIGE system. Eighty-seven proteins were differentiall ...
Hall Steven C.; Hassis Maria E.; Williams Katherine E.; Albertolle Matthew E.; Prakobphol Akraporn; Dykstra Andrew B.; Laurance Megan; Ona Katherine; Niles Richard K.; Prasad Namrata; Gormley Matthew; Shiboski Caroline; Criswell Lindsey A.; Witkowska H. Ewa; Fisher Susan J.
... We used isobaric mass tagging (iTRAQ) and lectin affinity capture mass spectrometry (MS)-based workflows for global analyses of parotid saliva (PS) and whole saliva (WS) samples obtained from patients diagnosed with primary Sjögren’s Syndrome (pSS) who were enrolled in the Sjögren’s International Collaborative Clinical Alliance (SICCA) as compared with two control groups. The iTRAQ analyses reve ...
... Here we report evidence that new aminoquinoline N-glycan fluorescent labels interfere with the release of core α(1–6) fucose from N-glycans by bovine kidney α-l-fucosidase (BKF). BKF is a commonly employed exoglycosidase for core α(1–6) fucose determination. Molecular simulations of the bound and unbound Fuc-α(1–6)-GlcNAc, where GlcNAc is situated at the reducing end for all N-glycans, suggest tha ...
... Preterm delivery (PTD) represents a major health problem that occurs in 1 in 10 births. The hypothesis of the present study was that the metabolic profile of different biological fluids, obtained from pregnant women during the second trimester of gestation, could allow useful correlations with pregnancy outcome. Holistic and targeted metabolomics approaches were applied for the complementary asses ...
acetone; apolipoprotein C-III; biomarkers; biopharmaceuticals; capillary electrophoresis; cattle; digestion; discriminant analysis; erythropoietin; humans; least squares; mass spectrometry; ovalbumin; physicochemical properties; principal component analysis; proteome; quality control
Abstract:
... Acetone precipitation was evaluated as a rapid, simple, low-cost, and efficient method for the selective purification of O-glycopeptides from enzymatic digests of glycoproteins. Ovalbumin (OVA), human and bovine α₁-acid glycoprotein (hAGP and bAGP), human apolipoprotein C–III (APO-C3), and recombinant human erythropoietin (rhEPO) were used to obtain enzymatic digests with a broad and varied set of ...
Casey Tammy M.; Khan Javed M.; Bringans Scott D.; Koudelka Tomas; Takle Pari S.; Downs Rachael A.; Livk Andreja; Syme Robert A.; Tan Kar-Chun; Lipscombe Richard J.
computer software; protein synthesis; proteins; proteome; quantitative analysis
Abstract:
... This study aimed to compare the depth and reproducibility of total proteome and differentially expressed protein coverage in technical duplicates and triplicates using iTRAQ 4-plex, iTRAQ 8-plex, and TMT 6-plex reagents. The analysis was undertaken because comprehensive comparisons of isobaric mass tag reproducibility have not been widely reported in the literature. The highest number of proteins ...
... Arthropod-borne protozoan pathogens have a complex life cycle that includes asexual reproduction of haploid stages in mammalian hosts and the development of diploid stages in invertebrate hosts. The ability of pathogens to invade, survive, and replicate within distinct cell types is required to maintain their life cycle. In this study, we describe a comparative proteomic analysis of a cattle patho ...
Sus scrofa; animal models; applied research; genes; humans; juveniles; mass spectrometry; pregnancy; protein synthesis; proteins; proteome; proteomics; swine; xenotransplantation
Abstract:
... The pig is one of the earliest domesticated animals in the history of human civilization and represents one of the most important livestock animals. The recent sequencing of the Sus scrofa genome was a major step toward the comprehensive understanding of porcine biology, evolution, and its utility as a promising large animal model for biomedical and xenotransplantation research. However, the funct ...