Search results for "Multiple reaction monitoring"

showing 5 items of 5 documents

A multicentric study to evaluate the use of relative retention times in targeted proteomics.

2016

Despite the maturity reached by targeted proteomic strategies, reliable and standardized protocols are urgently needed to enhance reproducibility among different laboratories and analytical platforms, facilitating a more widespread use in biomedical research. To achieve this goal, the use of dimensionless relative retention times (iRT), defined on the basis of peptide standard retention times (RT), has lately emerged as a powerful tool. The robustness, reproducibility and utility of this strategy were examined for the first time in a multicentric setting, involving 28 laboratories that included 24 of the Spanish network of proteomics laboratories (ProteoRed-ISCIII). According to the results…

0301 basic medicineMultiple reaction monitoringProteomicsBiomedical ResearchComputer scienceBiophysicsLiquid chromatographyContext (language use)BioinformaticsBiochemistry03 medical and health sciencesInter-laboratory validationTargeted proteomicsObserver VariationReproducibilityResearchReproducibility of ResultsAnalytical scienceReference StandardsStandardizationReproducibilityCell and molecular biologyTargeted proteomics030104 developmental biologyBiological significanceBiochemical engineeringRetention timeChromatography LiquidJournal of proteomics
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In vitro evaluation of poloxamer in situ forming gels for bedaquiline fumarate salt and pharmacokinetics following intramuscular injection in rats

2019

Graphical abstract

In situPO Propylene oxideIV IntravenousP338 Poloxamer 338lcsh:RS1-441Pharmaceutical Sciencechemistry.chemical_compoundn Sample sizeSD Standard deviationIM Intramuscularchemistry.chemical_classificationC0 Analyte plasma concentration at time zeroDoE Design of experimentsUV UltravioletPharmacology. TherapyK2.EDTA Potassium ethylenediaminetetraacetic acidLC–MS/MS Liquid chromatography-tandem mass spectrometryH&E Hematoxylin and eosintmax Sampling time to reach the maximum observed analyte plasma concentrationIn situ forming gelsCMC Critical micellar concentrationCmax Maximum observed analyte plasma concentrationIntramuscular injectionDN Dose normalizedGPT Gel point temperaturePLGA Poly-(DL-lactic-co-glycolic acid)TFA Trifluoroacetic acidCAN AcetonitrileATP Adenosine 5′ triphosphateSalt (chemistry)Polyethylene glycolPoloxamerArticlelcsh:Pharmacy and materia medicaPharmacokineticsIn vivoUHPLC Ultra-high performance liquid chromatographyPharmacokineticsAUClast Area under the analyte concentration versus time curve from time zero to the time of the last measurable (non-below quantification level) concentrationEO Ethylene oxideNMP N-methyl-2-pyrrolidoneComputingMethodologies_COMPUTERGRAPHICSAUC∞ Area under the analyte concentration vs time curve from time zero to infinite timeP407 Poloxamer 407In vitro releasePoloxamerCMT Critical micellar temperatureGel erosionIn vitrot1/2 Apparent terminal elimination half-lifechemistryMDR-TB Multi-drug resistant tuberculosisAUC80h Area under the analyte concentration versus time curve from time zero to 80 htlast Sampling time until the last measurable (non-below quantification level) analyte plasma concentrationMRM Multiple reaction monitoringNuclear chemistrySustained releaseInternational Journal of Pharmaceutics: X
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Lipidomic profiling identifies signatures of metabolic risk

2020

Background: Metabolic syndrome (MetS), the clustering of metabolic risk factors, is associated with cardiovascular disease risk. We sought to determine if dysregulation of the lipidome may contribute to metabolic risk factors. Methods: We measured 154 circulating lipid species in 658 participants from the Framingham Heart Study (FHS) using liquid chromatography-tandem mass spectrometry and tested for associations with obesity, dysglycemia, and dyslipidemia. Independent external validation was sought in three independent cohorts. Follow-up data from the FHS were used to test for lipid metabolites associated with longitudinal changes in metabolic risk factors. Results: Thirty-nine lipids were…

Male0301 basic medicineResearch paperdhSL dihydrosphingolipidBMI body mass indexlcsh:MedicineATHEROGENIC LIPOPROTEINSBioinformaticsFHS Framingham Heart StudyPC phosphatidylcholinePESA Progression of Early Subclinical Atherosclerosis0302 clinical medicineFramingham Heart StudyRisk FactorsSAFHS San Antonio Family Heart StudyLC-MS/MS liquid chromatography-tandem mass spectrometryMedicineLongitudinal StudiesMetabolic riskPLASMA SPHINGOLIPID METABOLISMPOPULATIONlcsh:R5-920education.field_of_studySPHINGOMYELINCE cholesteryl esterDysglycemiaGeneral MedicineMiddle AgedLipidomePS phosphatidylserineCardiovascular diseaseLipidsMetabolic syndrome3. Good healthCARDIOVASCULAR-DISEASE030220 oncology & carcinogenesisHEARTMetS metabolic syndromeFemaleDisease SusceptibilityLGPL lysoglycerophospholipidSL sphingolipidlcsh:Medicine (General)LPE lysophosphatidylethanolamineAdultFDR false discovery rateTAG triacylglycerolPopulationCer ceramideCVD cardiovascular diseasePE phosphatidylethanolamineDENSITY-LIPOPROTEINRisk AssessmentGeneral Biochemistry Genetics and Molecular Biology03 medical and health sciencesAnimalsHumanseducationT2DM type II diabetes mellitusAgedLPC lysophosphatidylcholineSM sphingomyelinbusiness.industryCERAMIDElcsh:RHDL-C High density lipoprotein cholesterolBiomarkerLipid Metabolismmedicine.diseaseObesitySphingolipidCross-Sectional Studies030104 developmental biologyDyslipidemiaERF Erasmus Family StudyLipidomicsMetabolic syndromeINDUCED INSULIN-RESISTANCEbusinessDAG diacylglycerolBody mass indexBiomarkersDyslipidemiaMRM multiple reaction monitoringFASTING GLUCOSE
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Determination of ketosteroid hormones in meat by liquid chromatography tandem mass spectrometry and derivatization chemistry.

2015

A method for the determination and quantification of ketosteroid hormones in meat by mass spectrometry, based on the derivatization of the carbonyl moiety of steroids by O-methylhydroxylamine, is presented. The quantitative assay is performed by means of multiple-reaction-monitoring (MRM) scan mode and using the corresponding labelled species, obtained by reaction with d 3-methoxylamine, as internal standard. The accuracy of the method was established by evaluating artificially spiked samples, obtaining values in the range 90-110%. Recovery tests were performed on blank matrix samples spiked with non-natural steroids including trenbolone and melengestrol acetate. The latter experiment revea…

Multiple reaction monitoringChromatographyMeatMass spectrometrySelected reaction monitoringKetosteroidMass spectrometrySolid-phase microextractionKetosteroidsBiochemistryAnalytical ChemistryMatrix (chemical analysis)chemistry.chemical_compoundTrenbolonechemistryLiquid chromatography–mass spectrometryTandem Mass SpectrometryKetosteroidMethoxylamineUHPLCmedicineDerivatizationSolid Phase Microextractionmedicine.drugAnalytical and bioanalytical chemistry
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Multiple reaction monitoring for identification and quantification of oligosaccharides in legumes using a triple quadrupole mass spectrometer.

2022

Raffinose family oligosaccharides are non-digestible compounds considered as dietary prebiotics with health-related properties. Hence, it is important to develop highly specific methods for their determination. An analytical method is developed in this study for oligosaccharide identification and quantification using liquid chromatography-tandem mass spectrometry equipped with a triple quadrupole analyser operating in Multiple Reaction Monitoring mode. Raffinose, stachyose and verbascose are separated in a 10-minute run and the method is validated over a broad concentration range, showing good linearity, accuracy, precision and high sensitivity. A low-cost, short eco-friendly procedure for …

Triple quadrupoleMultiple reaction monitoringMolecular biologyOligosaccharidesMass spectrometryMass SpectrometryAnalytical ChemistryStachyosechemistry.chemical_compoundAlimentosRaffinoseChromatography High Pressure Liquidchemistry.chemical_classificationBiología molecularChromatographySelected reaction monitoringExtraction (chemistry)Reproducibility of ResultsFabaceaeGeneral MedicineRepeatabilityOligosaccharideLegumesTriple quadrupole mass spectrometerchemistryFoodFood ScienceChromatography LiquidFood chemistry
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