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001-es BibID:BIBFORM116213
035-os BibID:(WoS)001104988800001 (Scopus)85178183698
Első szerző:Farsang Róbert
Cím:Capillary Zone Electrophoresis of 8-Aminopyrene-1,3,6-trisulfonic Acid Labeled Carbohydrates with Online Electrokinetic Sample Cleanup / Farsang Robert, Hogyor Kinga, Jarvas Gabor, Guttman Andras
Dátum:2023
ISSN:0003-2700
Megjegyzések:Capillary electrophoresis is one of the frequently used separation techniques for the analysis of complex carbohydrates. Since sugars lack chromophore or fluorophore groups, their capillary electrophoresis analysis usually requires tagging by a charged fluorophore. To speed up the derivatization reaction, a large excess of the labeling reagent is typically used; therefore, a purification step is necessary prior to CE analysis using the industry standard low-pH gel-buffer system. In addition to representing an extra sample preparation step with the associated labor and cost, the purification process also holds the risk of losing some of the sample components. In this paper we introduce an online electrokinetic sample cleanup process with electroosmotic flow (EOF)-assisted separation in a bare fused silica capillary using alkaline pH background electrolyte and normal polarity separation voltage. 8-Aminopyrene-1,3,6-trisulfonic acid (APTS)-labeled maltooligosaccharides were analyzed first to understand the complex effect of the downstream EOF and the counter current electromigration of the sample components including the labeling dye. The use of 150 mM caproic acid?253 mM Tris (pH 8.1) running buffer facilitated the entrance of the sample components of interest into the separation capillary, while the excess labeling reagent was excluded and, therefore, did not interfere with the detection. The alkaline caproic acid?Tris running buffer was then applied to the N-glycome analysis of human serum samples, showing excellent separation performance, and more importantly, the extra sample purification step was not required.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Capillary electrophoresis
Carbohydrates
Electroosmosis
Labeling
Polarity
Megjelenés:Analytical Chemistry. - 95 : 45 (2023), p. 16459-16464. -
További szerzők:Hogyor Kinga Járvás Gábor (1982-) (vegyészmérnök) Guttman András (1954-) (vegyészmérnök)
Pályázati támogatás:DE TUDFIN
Egyéb
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2.

001-es BibID:BIBFORM065042
035-os BibID:(WoS)000365931100006 (Scopus)84948451094
Első szerző:Guttman András (vegyészmérnök)
Cím:Effect of Separation Temperature on Structure Specific Glycan Migration in Capillary Electrophoresis / Andras Guttman, Marta Kerekgyarto, Gabor Jarvas
Dátum:2015
ISSN:0003-2700
Megjegyzések:Temperature dependent differential migration shifts were studied in capillary electrophoresis between linear (maltooligosaccharides) and branched (sialylated, neutral and core fucosylated biantennary IgG glycans) carbohydrates. Background electrolytes without as well as with low and high molecular weight additives (ethylene glycol, linear polyacrylamide and poly(ethylene oxide)) were investigated for this phenomena in the temperature range of 20-50 ?C. Glucose unit (GU) value shifts were observed with increasing temperature for the all IgG glycans both in additive-free and additive-containing background electrolytes, emphasizing the importance of tight temperature control during glycosylation analysis by capillary electrophoresis. The activation energy concept was applied to understand the structure specific electrophoretic migration of the different sugar molecules. Activation energy values were derived from the slopes of the Arrhenius plots of logarithmic mobility vs reciprocal absolute temperature and compared for the linear and branched sugars as well as for the various background electrolyte additives.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
capillary electrophoresis
glycan structure
mobility
temperature
activation energy
Megjelenés:Analytical Chemistry. - 87 : 23 (2015), p. 11630-11634. -
További szerzők:Kerékgyártó Márta (1987-) (molekuláris biológus) Járvás Gábor (1982-) (vegyészmérnök)
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Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:BIBFORM084499
035-os BibID:(WoS)000389556900019 (Scopus)85020945816
Első szerző:Járvás Gábor (vegyészmérnök)
Cím:Triple-Internal Standard Based Glycan Structural Assignment Method for Capillary Electrophoresis Analysis of Carbohydrates / Jarvas Gabor, Szigeti Marton, Chapman Jeff, Guttman Andras
Dátum:2016
ISSN:0003-2700
Megjegyzések:Despite the ever growing use of capillary electrophoresis in biomedical research and the biopharmaceutical industry, the development of data interpretation methods is lagging behind. In this paper we report the design and implementation of a coinjected triple-internal standard method to alleviate the need of an accompanying run of the maltooligosaccharide ladder for glucose unit (GU) calculation. Based on the migration times of the coinjected standards of maltose, maltotriose, and maltopentadecaose (bracketing the peaks of interest), a data processing approach was designed and developed to set up a virtual ladder that was used for GU calculation. The data processing was tested in terms of the calculated GU values of human IgG glycans, and the resulting relative standard deviation was ?1.07%. This approach readily supports high-throughput capillary electrophoresis systems by significantly speeding up the processing time for glycan structural assignment.
Tárgyszavak:Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Analytical Chemistry. - 88 : 23 (2016), p. 11364-11367. -
További szerzők:Szigeti Márton (1986-) (környezetmérnök) Chapman, Jeff Guttman András (1954-) (vegyészmérnök)
Pályázati támogatás:NKFIH K116263
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Intézményi repozitóriumban (DEA) tárolt változat
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4.

001-es BibID:BIBFORM083125
035-os BibID:(WoS)000508387300005 (Scopus)85074228284
Első szerző:Járvás Gábor (vegyészmérnök)
Cím:Practical sample pretreatment techniques coupled with capillary electrophoresis for real samples in complex matrices / Jarvas Gabor, Guttman Andras, Miekus Natalia, Baczek Tomasz, Jeong Sunkyung, Chung Doo Soo, Pätoprsty Vladimir, Masár Marián, Hutta Milan, Datinská Vladimira, Foret Frantisek
Dátum:2020
ISSN:0165-9936
Megjegyzések:By coupling a sample pretreatment technique of sample clean up and enrichment power with capillary electrophoresis (CE) of high-performance separation, the task of analyzing trace analytes in a complex matrix such as a biological sample can be carried out successfully with ease. This review aims for providing an overview of strategies to couple sample pretreatment techniques with capillary and related microscale (e.g., microchip) electrophoresis, practically adoptable in an automatic manner, without requiring serious modification of existing instruments to install sophisticated interfaces. In-line sample pretreatment techniques based on liquid phase microextraction performed before sample injection and on-line sample preconcentration techniques performed during or after sample injection are discussed with emphasis on the applicability to samples of high conductivity, commonly encountered for biological samples. An overview of the recent developments in microfluidic immobilized enzymatic microreactors which fit excellently to microchip CE is also given.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Trac-Trends In Analytical Chemistry. - 122 (2020), p. 2-9. -
További szerzők:Guttman András (1954-) (vegyészmérnök) Miȩkus, Natalia Bączek, Tomasz Jeong, Sunkyung Chung, Doo Soo Pätoprstý, Vladimir Masár Marián Hutta, Milan Datinská, Vladimira Foret, František
Pályázati támogatás:Bionano_GINOP-2.3.2-15-2016-00017
GINOP
K116263
NKFIH
NN127062
NKFIH
2018-2.1.17-TET-KR-2018-00010
NKFIH
ÚNKP-19-4
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Intézményi repozitóriumban (DEA) tárolt változat
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5.

001-es BibID:BIBFORM083126
035-os BibID:(WoS)000508387300020 (Scopus)85075579456
Első szerző:Szekrényes Ákos (vegyészmérnök)
Cím:Quantitative comparison of the N-glycosylation of therapeutic glycoproteins using the Glycosimilarity Index. A tutorial / Szekrenyes Akos, Szigeti Marton, Dvorakova Veronika, Jarvas Gabor, Guttman Andras
Dátum:2020
ISSN:0165-9936
Megjegyzések:Glycosylation is considered as one of the crucial critical quality attributes of therapeutic glycoproteins and for their biosimilar counterparts. Carbohydrate moieties of such biopharmaceuticals should be closely monitored during all stages of development and manufacturing and studied accordingly during comparability or similarity exercises. In therapeutic glycoprotein production, the batch-to-batch alteration in glycosylation represents an excellent indicator of process robustness. Due to the complexity of the obtained glycoanalytical profile it is challenging to determine and describe the level of similarity between the N-glycosylation characteristics of two glycoprotein production lots or between the reference batch and its biosimilar versions. In this tutorial, we provide a step-by-step approach to calculate a numerical similarity value of N-glycosylation, referred to as Glycosimilarity Index that can be efficiently used to assess the conformity degree of any new N-glycosylation profile to a given target profile.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Trac-Trends In Analytical Chemistry. - 122 (2020), p. 1-8. -
További szerzők:Szigeti Márton (1986-) (környezetmérnök) Dvorakova, Veronika Járvás Gábor (1982-) (vegyészmérnök) Guttman András (1954-) (vegyészmérnök)
Pályázati támogatás:BIONANO_GINOP-2.3.2-15-2016-00017
GINOP
K116263
NKFIH
NN127062
NKFIH
2018-2.1.17-TET-KR-2018-00010
NKFIH
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
Borító:
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