1
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Schneck NA, Moghieb A, Teague C, Perez HL. Development and application of a multi-sugar assay to assess intestinal permeability. Bioanalysis 2024:1-13. [PMID: 39023344 DOI: 10.1080/17576180.2024.2374168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Accepted: 06/26/2024] [Indexed: 07/20/2024] Open
Abstract
Aim: Bioanalytical assays to measure rhamnose, erythritol, lactulose and sucralose in human urine and plasma were developed to support an indomethacin challenge study for intestinal permeability assessment in healthy participants. Methods: The multi-sugar assays utilized 5-μl sample matrix and a simple chemical derivatization with acetic anhydride, followed by RPLC-MS/MS detection. Results: Rhamnose and erythritol quantification was established between 1.00-1,000 μg/ml in urine and 250-250,000 ng/ml in plasma. For lactulose and sucralose, dynamic ranges of 0.1-100 μg/ml (urine) and 25-25,000 ng/ml (plasma) were applied for biological measurements. Conclusion: This work helped overcome some of the common analytical challenges associated with the bioanalysis of mono- and disaccharides and achieved improved limits of quantification.
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Affiliation(s)
- Nicole A Schneck
- GSK, Biomarker Platforms, Precision Medicine, GSK, 1250 S Collegeville Rd, Collegeville, PA 19426, USA
| | - Ahmed Moghieb
- GSK, Biomarker Platforms, Precision Medicine, GSK, 1250 S Collegeville Rd, Collegeville, PA 19426, USA
| | - Claire Teague
- GSK, Gunnels Wood Road, Stevenage, SG1 2NY, United Kingdom
| | - Hermes Licea Perez
- GSK, Biomarker Platforms, Precision Medicine, GSK, 1250 S Collegeville Rd, Collegeville, PA 19426, USA
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2
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Suresh H, Mikhael M, Ho V, Zhou J. A HPLC-ESI-Q-ToF-MS Method for the Analysis of Monomer Constituents in PHGG, Gum Arabic And Psyllium Husk Prebiotic Dietary Fibre Supplements. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2022. [DOI: 10.1080/10942912.2022.2096064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Harsha Suresh
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
| | - Meena Mikhael
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Mass Spectrometry Unit Research Services, Western Sydney University, Campbelltown, Australia
| | - Vincent Ho
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
- University Medical Clinic of Camden & Campbelltown (UMCCC), Campbelltown, Australia
| | - Jerry Zhou
- School of Medicine, Western Sydney University, Campbelltown, Australia
- Gastrointestinal Motility Disorders Unit, Western Sydney University, Campbelltown, Australia
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3
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Rajendiran V, El Rassi Z. Retention behaviors of pre-column derivatized mono-, di- and oligosaccharides in various modes of high performance liquid chromatography. J Chromatogr A 2022; 1682:463508. [PMID: 36155077 DOI: 10.1016/j.chroma.2022.463508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/11/2022] [Accepted: 09/15/2022] [Indexed: 11/29/2022]
Abstract
Three LC-based methods, including reversed-phase chromatography (RPC), ion-pair RPC and weak anion-exchange chromatography (WAX), were examined in the separations of precolumn derivatized mono- and oligosaccharides with the following three tagging agents: 1-naphthylamine (1-NA), 2-aminoanthracene (2-AA), and 3-amino-2,7-naphthalenedisulfonic acid (ANDSA). Due to differences in their charges and polarity, the three tagging agents imparted the sugar derivatives varying elution patterns in the three, just mentioned, chromatographic modes. While RPC yielded high resolution separations for 1-NA- and 2-AA-sugar derivatives, ion-pair RPC in the presence of the ion-pairing agent dodecyl trimethylammonium bromide (DTAB) in the mobile phase exhibited far more resolution and selectivity than WAX in the separation of ANDSA-sugar derivatives. This finding portrays the fact that an octadecyl column operating in ion-pair RPC mode can eliminate in most cases the need for an ion-exchange column for bioanalytical separations of ionic or ionizable species. Lastly, the characteristics of each chromatographic mode in the analysis of derivatized sugars are described using various mobile phase compositions.
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Affiliation(s)
- Vaithilingam Rajendiran
- Department of Chemistry, Oklahoma State University Stillwater, Stillwater, OK 74078-3071, United States
| | - Ziad El Rassi
- Department of Chemistry, Oklahoma State University Stillwater, Stillwater, OK 74078-3071, United States.
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4
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Development and Validation of HPLC-DAD Method with Pre-Column PMP Derivatization for Monomeric Profile Analysis of Polysaccharides from Agro-Industrial Wastes. Polymers (Basel) 2022; 14:polym14030544. [PMID: 35160536 PMCID: PMC8838364 DOI: 10.3390/polym14030544] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/12/2022] [Accepted: 01/25/2022] [Indexed: 01/19/2023] Open
Abstract
The instrumental analysis of complex mixtures of sugars often requires derivatization to enhance the method’s selectivity and sensitivity. 1-Phenyl-3-methyl-5-pyrazolone (PMP) is a common sugar derivatization agent used in high-performance liquid chromatography (HPLC). Although many C18 column applications for PMP–sugar derivative analysis have been developed, their transferability is not straightforward due to variations in column chemistry and preparation technology. The aim of this study was to develop and validate an application for Zorbax Extend C18 columns for the analysis of 8 neutral and 2 acidic sugars commonly found in plant polysaccharides. The method was further compared to well-established alditol acetates and m-hydroxydiphenyl methods and employed for sugar profiling of selected agro-industrial wastes. The most influential separation factors were the mobile-phase pH and acetonitrile content, optimized at 8.0 and a 12–17% gradient, respectively. The method showed excellent linearity, repeatability and intermediate precision. High sensitivity was achieved, especially for neutral sugars, with an accuracy error range of 5–10% relative standard deviation. The sugar profiling results were highly correlated to the reference method for neutral sugars. The HPLC method was highly applicable for the evaluation of polysaccharides in selected wastes and showed advantages in terms of simplicity, accuracy in acidic sugar determination and suitability for their simultaneous analysis with neutral sugars.
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5
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Durán-Álvarez JC, Rodríguez-Varela M, Verdeja-Muñoz EJ, Córdova-Aguilar MS. Determination of the monosaccharide composition in mucilage of Opuntia ficus indica by HPLC-ESI-MS - validation of the sample preparation and the analytical method. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-021-00995-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Yu K, Duan Y, Gan Y, Zhang Y, Zhao K. Anthropogenic influences on dissolved organic matter transport in high arsenic groundwater: Insights from stable carbon isotope analysis and electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:135162. [PMID: 31787315 DOI: 10.1016/j.scitotenv.2019.135162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/02/2019] [Accepted: 10/23/2019] [Indexed: 06/10/2023]
Abstract
In East and Southeast Asia, the health of over 100 million people is threatened by the consumption of groundwater containing high concentrations of arsenic (>10 μg L-1), which is released from sediments through reductive dissolution of arsenic-bearing iron/manganese oxides. Dissolved organic matter (DOM) is known to play a crucial role in the process of arsenic mobilization in shallow aquifers, and its availability and reactivity are key factors controlling the variation of arsenic concentrations in groundwater. However, it is unclear how human activities influence the transport of DOM and how the transportation affects the DOM molecular properties in high arsenic groundwater. This study provides insights on the sources and molecular compositions of DOM in groundwater from the Jianghan Plain, central China, a newly discovered area with seasonal fluctuations in arsenic concentrations in shallow groundwater. Monitoring of water levels and stable carbon isotope compositions in groundwater from different depths and canal water over a year indicated that terrestrial DOM was the dominant source, accounting for 54.2%-85.5% of groundwater DOM. Electrospray ionization combined with ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry revealed that canal water infiltration transferred aliphatic, tannin-like and leached aromatic DOM from sediments into groundwater. Therefore, groundwater recharge through irrigation using canal water not only inputs terrestrial DOM, but also accelerates the release of sedimentary DOM. Furthermore, carboxylic-rich alicyclic molecule (CRAM)-like DOM that is derived from biomolecules has the highest proportion (60.1%-65.5%) among the identified DOM structures. And, it might be reused in biochemical processes during arsenic mobilization, suggesting a third source of groundwater DOM in addition to canal water and sediments. The findings in this study advance the understanding on transport processes and molecular properties of DOM in high arsenic groundwater under extensive anthropogenic influences.
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Affiliation(s)
- Kai Yu
- State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science & Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Yanhua Duan
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Yiqun Gan
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
| | - Yanan Zhang
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
| | - Ke Zhao
- School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
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7
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Guo N, Bai Z, Jia W, Sun J, Wang W, Chen S, Wang H. Quantitative Analysis of Polysaccharide Composition in Polyporus umbellatus by HPLC-ESI-TOF-MS. Molecules 2019; 24:molecules24142526. [PMID: 31295903 PMCID: PMC6681038 DOI: 10.3390/molecules24142526] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 07/08/2019] [Accepted: 07/08/2019] [Indexed: 11/16/2022] Open
Abstract
Polyporus umbellatus is a well-known and important medicinal fungus in Asia. Its polysaccharides possess interesting bioactivities such as antitumor, antioxidant, hepatoprotective and immunomodulatory effects. A qualitative and quantitative method has been established for the analysis of 12 monosaccharides comprising polysaccharides of Polyporus umbellatus based on high-performance liquid chromatography coupled with electrospray ionization–ion trap–time of flight–mass spectrometry. The hydrolysis conditions of the polysaccharides were optimized by orthogonal design. The results of optimized hydrolysis were as follows: neutral sugars and uronic acids 4 mol/L trifluoroacetic acid (TFA), 6 h, 120 °C; and amino sugars 3 mol/L TFA, 3 h, 100 °C. The resulting monosaccharides derivatized with 1-phenyl-3-methyl-5-pyrazolone have been well separated and analyzed by the established method. Identification of the monosaccharides was carried out by analyzing the mass spectral behaviors and chromatography characteristics of 1-phenyl-3-methyl-5-pyrazolone labeled monosaccharides. The results showed that polysaccharides in Polyporus umbellatus were composed of mannose, glucosamine, rhamnose, ribose, lyxose, erythrose, glucuronic acid, galacturonic acid, glucose, galactose, xylose, and fucose. Quantitative recoveries of these monosaccharides in the samples were in the range of 96.10–103.70%. This method is simple, accurate, and sensitive for the identification and quantification of monosaccharides, and can be applied to the quality control of Polyporusumbellatus as a natural medicine.
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Affiliation(s)
- Ning Guo
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Zongli Bai
- Kangmei Pharmaceutical Co.Ltd, Puning 515300, China
| | - Weijuan Jia
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Jianhua Sun
- Kangmei Pharmaceutical Co.Ltd, Puning 515300, China
| | - Wanwan Wang
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Shizhong Chen
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| | - Hong Wang
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
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8
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Villa-Rodriguez JA, Kerimi A, Abranko L, Tumova S, Ford L, Blackburn RS, Rayner C, Williamson G. Acute metabolic actions of the major polyphenols in chamomile: an in vitro mechanistic study on their potential to attenuate postprandial hyperglycaemia. Sci Rep 2018; 8:5471. [PMID: 29615674 PMCID: PMC5882934 DOI: 10.1038/s41598-018-23736-1] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 03/20/2018] [Indexed: 01/19/2023] Open
Abstract
Transient hyperglycaemia is a risk factor for type 2 diabetes and endothelial dysfunction, especially in subjects with impaired glucose tolerance. Nutritional interventions and strategies for controlling postprandial overshoot of blood sugars are considered key in preventing progress to the disease state. We have identified apigenin-7-O-glucoside, apigenin, and (Z) and (E)−2-hydroxy-4-methoxycinnamic acid glucosides as the active (poly)phenols in Chamomile (Matricaria recutita) able to modulate carbohydrate digestion and absorption in vitro as assessed by inhibition of α-amylase and maltase activities. The latter two compounds previously mistakenly identified as ferulic acid hexosides were purified and characterised and studied for their contribution to the overall bioactivity of chamomile. Molecular docking studies revealed that apigenin and cinnamic acids present totally different poses in the active site of human α-amylase. In differentiated Caco-2/TC7 cell monolayers, apigenin-7-O-glucoside and apigenin strongly inhibited D-[U-14C]-glucose and D-[U-14C]-sucrose transport, and less effectively D-[U-14C]-fructose transport. Inhibition of D-[U-14C]-glucose transport by apigenin was stronger under Na+-depleted conditions, suggesting interaction with the GLUT2 transporter. Competitive binding studies with molecular probes indicate apigenin interacts primarily at the exofacial-binding site of GLUT2. Taken together, the individual components of Chamomile are promising agents for regulating carbohydrate digestion and sugar absorption at the site of the gastrointestinal tract.
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Affiliation(s)
| | - Asimina Kerimi
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | - Laszlo Abranko
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK.,Szent István University, Faculty of Food Science, Department of Applied Chemistry, 29-43 Villányi, Budapest, H-1118, Hungary
| | - Sarka Tumova
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | - Lauren Ford
- School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK.,School of Design, University of Leeds, Leeds, LS2 9JT, UK
| | | | | | - Gary Williamson
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK.
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9
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Simultaneous Analysis of Saccharides between Fresh and Processed Radix Rehmanniae by HPLC and UHPLC-LTQ-Orbitrap-MS with Multivariate Statistical Analysis. Molecules 2018; 23:molecules23030541. [PMID: 29495582 PMCID: PMC6017318 DOI: 10.3390/molecules23030541] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/23/2018] [Accepted: 02/26/2018] [Indexed: 01/17/2023] Open
Abstract
Radix Rehmanniae (RR) is a kind of herb which is widely used in the clinical and food processing industry. There are four forms of RR used in traditional Chinese medicine practice, which include fresh RR (FRR), raw RR (RRR), processed RR (PRR), and another processed RR (APRR), in which the APRR was processed by nine cycles of repeated steaming and drying. There are a large number of saccharides in RR. However, the differences in content were shown by different processing methods. In this study, an effective method using high-performance liquid chromatography (HPLC) and high-performance liquid chromatography-mass spectrometry (LC-MS) coupled with multivariate statistical analysis to rapidly distinguish different RR samples and validate the proposed chemical conversion mechanism. The datasets of the content of saccharides were subjected to principal component analysis (PCA) and one-way analysis of variance. The results showed that there different changes occurred in the contents of saccharides corresponding to the different processing methods, in which the contents of monosaccharides—namely arabinose, glucose, mannose, and galactose—had an increasing trend or remained relatively stable. However, the contents of fructose and oligosaccharides, including manninotriose, melibiose, sucrose, and raffinose, first increased and then reduced, or gradually decreased, yet the content of stachyose gradually decreased. The MSn data indicated that manninotriose, melibiose, and some monosaccharides were produced by the hydrolysis of oligosaccharides. In addition, the fragmentation pathways of 1-phenyl-3-methyl-5-pyrazolone (PMP) derivatization of monosaccharides were also found that its glycosidic bond was first broken and subsequently its inside ring broke, and the characteristic fragment ions were produced at m/z 511.22, 493.20, 373.16, and 175.08 in the PMP derivatization of monosaccharides. In conclusion, this study illustrates the change and chemical conversion mechanism of saccharides by processing in RR samples which might play a key role in further application of RR.
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10
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Quantification and comparison of acidic polysaccharides in edible fish intestines and livers using HPLC-MS/MS. Glycoconj J 2017; 34:625-632. [DOI: 10.1007/s10719-017-9783-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 06/15/2017] [Accepted: 06/20/2017] [Indexed: 12/21/2022]
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11
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Ferey J, Da Silva D, Bravo-Veyrat S, Lafite P, Daniellou R, Maunit B. Validation of a thin-layer chromatography/densitometry method for the characterization of invertase activity. J Chromatogr A 2016; 1477:108-113. [DOI: 10.1016/j.chroma.2016.11.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 11/18/2016] [Accepted: 11/24/2016] [Indexed: 11/28/2022]
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12
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Wang BB, Wang JL, Yuan J, Quan QH, Ji RF, Tan P, Han J, Liu YG. Sugar Composition Analysis of Fuzi Polysaccharides by HPLC-MS n and Their Protective Effects on Schwann Cells Exposed to High Glucose. Molecules 2016; 21:molecules21111496. [PMID: 27834877 PMCID: PMC6273632 DOI: 10.3390/molecules21111496] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/02/2016] [Accepted: 11/02/2016] [Indexed: 12/29/2022] Open
Abstract
Fuzi has been used to treat diabetic complications for many years in china. In a previous study, we have shown that Fuzi aqueous extract can attenuate Diabetic peripheral neuropathy (DPN) in rats and protect Schwann cells from injury. Thus, the protective effect of Fuzi polysaccharides (FPS) on high glucose-induced SCs and the preliminary mechanism were investigated. Firstly, the FPS were obtained and their monose composition was analyzed by the combination of pre-column derivatization and high performance liquid chromatography coupled with electrospray ionization multi-tandem mass spectrometry (HPLC/ESI-MSn). The results witnessed the efficiency of this method and seven monosaccharides were tentatively identified, among which fucose was first reported. Simultaneously, m/z 215 can be considered as diagnostic ions to confirm the number of monosaccharides. Next, high glucose-induced SC model was applied and divided into model group, treated group of FPS, normal and osmotic control group. After treatment for 48 h, the data showed FPS could significantly decrease the intracellular ROS and apoptosis, which were determined by the corresponding fluorescent probes. Then, the expression of oxidative stress-related proteins in SCs were measured by Western blot. Furthermore, the protein tests found that FPS markedly up-regulated superoxide dismutase (SOD), catalase (CAT) and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) protein level, but down-regulated NADPH oxidase-1 (Nox1) protein level. Moreover, FPS could also increase AMP-activated protein kinase (AMPK) activation significantly. Hence, we preliminary deduced that AMPK-PGC-1α pathway may play an important role in the protective effect of FPS against high glucose-induced cell damage.
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Affiliation(s)
- Bei-Bei Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jia-Li Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jiang Yuan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Qing-Hua Quan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Rui-Fang Ji
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Peng Tan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jing Han
- Beijing Chinese Medicine Research Institute, Beijing University of Chinese Medicine, North Third Ring Road No. 11 School Range, Chaoyang District, Beijing 100029, China.
| | - Yong-Gang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
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13
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Quantification of Lactulose and Epilactose in the Presence of Lactose in Milk using a dual HPLC analysis. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0405-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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14
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He Y, Xie Q, Wang Y, Liang Y, Xu X, Li Y, Miao J, Chen Z, Li Y. Liquid chromatography mass spectrometry-based O-glycomics to evaluate glycosylation alterations in gastric cancer. Proteomics Clin Appl 2015; 10:206-15. [PMID: 26255982 DOI: 10.1002/prca.201500041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/06/2015] [Accepted: 08/03/2015] [Indexed: 02/02/2023]
Abstract
PURPOSE Gastric cancer is the fourth most common malignant cancer worldwide. Important for tumorigenesis and progression, aberrant glycosylation occurs frequently in cancers. We investigated the differences in O-glycosylation in the serum of 157 gastric cancer patients (GC) and 144 healthy donors. EXPERIMENTAL DESIGN We used the method of labeling O-glycans (released from proteins) with 1-phenyl-3-methyl-5-pyrazolone followed by LC-MS analysis. Analyzing the LC-MS data by partial least squares discriminant and unpaired Student t test, combined with the structural information of O-glycans from LC-MS/MS in positive mode. RESULTS The expression level of core1, core2, ST antigen, and core2 complex O-glycans (m/z 733.33, m/z 809.42) were increased significantly (p < 0.0001), whereas m/z 529.75 and diST-antigen were decreased in the serum of GC compared with controls (p < 0.001). In addition, there were significant correlations between the abundance of the O-glycans and glycoproteins (MUC1, CEA) in the serum of GC. CONCLUSION AND CLINICAL RELEVANCE Glycomics approaches identified multiple candidate antigens for patients with GC. The O-glycan structures are increased in the serum of GC, they may be candidates for carbohydrate tumor markers.
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Affiliation(s)
- Yun He
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, P. R. China
| | - Qin Xie
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, P. R. China
| | - Yanping Wang
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, P. R. China
| | - Yong Liang
- Clinical Laboratory, Huai'an Hospital Affiliated of Xuzhou Medical College, Huaian, P. R. China
| | - Xiukun Xu
- Suzhou Zhongying Medical Sciences and Technologies Company, Suzhou, P. R. China
| | - Yong Li
- Suzhou Pharmavan Cancer Research Center Company, Suzhou, P. R. China
| | - Jinsheng Miao
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, P. R. China
| | - Zijun Chen
- Department of Chinese Pharmaceutics, School of Chinese Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, P. R. China
| | - Yunsen Li
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, P. R. China
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15
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Wu X, Jiang W, Lu J, Yu Y, Wu B. Analysis of the monosaccharide composition of water-soluble polysaccharides from Sargassum fusiforme by high performance liquid chromatography/electrospray ionisation mass spectrometry. Food Chem 2014; 145:976-83. [PMID: 24128572 DOI: 10.1016/j.foodchem.2013.09.019] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 08/28/2013] [Accepted: 09/04/2013] [Indexed: 11/22/2022]
Abstract
Sargassum fusiforme (hijiki) is the well-known edible algae, whose polysaccharides have been proved to possess interesting bioactivities like antitumor, antioxidant, antimicrobial and immunomodulatory activities. A facile and sensitive method based on high-performance liquid chromatography method of pre-column derivatization with 1-phenyl-3-methyl-5-pyrazolone (PMP) coupled with electrospray ionisation mass spectrometry (HPLC/ESI-MS) has been established for the analysis of the monosaccharide composition of polysaccharides in S. fusiforme. Monosaccharides have been converted into PMP-labelled derivatives with aqueous ammonia as a catalyst at 70 °C for 30 min. The optimisation of the pre-column derivatization process was studied. The LODs of the monosaccharides were in the range from 0.01 to 0.02 nmol. PMP-labelled mixture of monosaccharides has been well separated by a reverse-phase HPLC and detected by on-line ESI-MS method under optimised conditions. The mobile phase of elution system was chosen as acetonitrile (solvent A) and 20mM aqueous ammonium acetate (solvent B) (pH 3.0) with Zorbax XDB-C18 column at 30 °C for the separation of the monosaccharide derivatives. Identification of the monosaccharides composition was carried out by analysis with mass spectral behaviour and chromatography characteristics of 1-phenyl-3-methyl-5-pyrazolone (PMP) labelled monosaccharides. All PMP-labelled derivatives display high chemical stabilities, whose regular MS fragmentation is specific for reducing labelled sugars. The result showed that the S. fusiforme polysaccharide consisted of mannose, glucose, galactose, xylose, fucose and glucuronic acid or galacturonic acid, or both uronic acids.
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Affiliation(s)
- Xiaodan Wu
- Center of Analysis and Measurement, Zhejiang University, Hangzhou 310058, People's Republic of China; Ocean College, Zhejiang University, Hangzhou 310058, People's Republic of China
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16
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Lattová E, Perreault H. The usefulness of hydrazine derivatives for mass spectrometric analysis of carbohydrates. MASS SPECTROMETRY REVIEWS 2013; 32:366-385. [PMID: 23345114 DOI: 10.1002/mas.21367] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 10/12/2012] [Accepted: 10/12/2012] [Indexed: 06/01/2023]
Abstract
Over the last years, extensive studies have evaluated glycans from different biological samples and validated the importance of glycosylation as one of the most important post-translational modifications of proteins. Although a number of new methods for carbohydrate analysis have been published and there has been significant progress in their identification, the development of new approaches to study these biomolecules and understand their role in living systems are still vivid challenges that intrigue glycobiologists. In the last decade, the success in analyses of oligosaccharides has been driven mainly by the development of innovative, highly sensitive mass spectrometry techniques. For enhanced mass spectrometry detection, carbohydrate molecules are often derivatized. Besides, the type of labeling can influence the fragmentation pattern and make the structural analysis less complicated. In this regard, in 2003 we introduced the low scale, simple non-reductive tagging of glycans employing phenylhydrazine (PHN) as the derivatizing reagent. PHN-labeled glycans showed increased detection and as reported previously they can be analyzed by HPLC, ESI, or MALDI immediately after derivatization. Under tandem mass spectrometry conditions, PHN-derivatives produced useful data for the structural elucidation of oligosaccharides. This approach of analysis has helped to reveal new isomeric structures for glycans of known/unknown composition and has been successfully applied for the profiling of N-glycans obtained from serum samples and cancer cells. The efficacy of this labeling has also been evaluated for different substituted hydrazine reagents. This review summarizes all types of reducing-end labeling based on hydrazone-linkage that have been used for mass spectrometric analyses of oligosaccharides. This review is also aimed at correcting some past misconceptions or interpretations reported in the literature.
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Affiliation(s)
- Erika Lattová
- Chemistry Department, University of Manitoba, 144 Dysart Road, Winnipeg, MB, Canada R3T 2N2.
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Determination of Aldoses, Deoxy-aldoses and Uronic Acids Content in a Pectin-Rich Extract by RP-HPLC-FLD after p-AMBA Derivatization. Chromatographia 2013. [DOI: 10.1007/s10337-013-2510-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Reinhold V, Zhang H, Hanneman A, Ashline D. Toward a platform for comprehensive glycan sequencing. Mol Cell Proteomics 2013; 12:866-73. [PMID: 23438731 DOI: 10.1074/mcp.r112.026823] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
From a series of recently published reports, an analytical platform has been proposed for a quantitative and qualitative measure of N- and O-glycosylation, complete with peptide-glycan connectivity and detailed structural understanding. As distant as this may appear, a best methods approach will appear that must move us beyond the cartoon stage of structural understanding. Thus, with this unifying goal in mind, we summarize a series of individually promising first phase protocols of sample preparation (release, purification, and quantification) that remain congruent with a concluding phase (methylation and MS(n)) for documented structural detail. Sequential enzymatic N-glycan and chemical O-glycan release from glycopeptides with intervening solid phase extraction and derivatization will provide for a comparative quantification measure of glycosylation. The O-glycan release will be nonreductive and coupled with Michael addition to a pyrazolone analog (1-phenyl-3-methyl-5-pyrazolone) with both the peptide and glycan labeled. The product glycans are stable to methylation and appropriate for sequential disassembly (MS(n)). An application using human serum and cancer samples has been detailed characterizing sLe(x) and comparable valence epitopes. This integrated platform will provide opportunities at variable points to contrast, share, and advance alternative protocols in a collaborative effort that is greatly needed. This integrated platform provides end point opportunities to confirm structural details compiled from synthetic standards and well characterized biologics by MS(n).
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Affiliation(s)
- Vernon Reinhold
- Glycomics Center, University of New Hampshire, Durham, New Hampshire 03824, USA.
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Effects of a glucokinase activator on hepatic intermediary metabolism: study with 13C-isotopomer-based metabolomics. Biochem J 2012; 444:537-51. [PMID: 22448977 DOI: 10.1042/bj20120163] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
GKAs (glucokinase activators) are promising agents for the therapy of Type 2 diabetes, but little is known about their effects on hepatic intermediary metabolism. We monitored the fate of (13)C-labelled glucose in both a liver perfusion system and isolated hepatocytes. MS and NMR spectroscopy were deployed to measure isotopic enrichment. The results demonstrate that the stimulation of glycolysis by GKA led to numerous changes in hepatic metabolism: (i) augmented flux through the TCA (tricarboxylic acid) cycle, as evidenced by greater incorporation of (13)C into the cycle (anaplerosis) and increased generation of (13)C isotopomers of citrate, glutamate and aspartate (cataplerosis); (ii) lowering of hepatic [Pi] and elevated [ATP], denoting greater phosphorylation potential and energy state; (iii) stimulation of glycogen synthesis from glucose, but inhibition of glycogen synthesis from 3-carbon precursors; (iv) increased synthesis of N-acetylglutamate and consequently augmented ureagenesis; (v) increased synthesis of glutamine, alanine, serine and glycine; and (vi) increased production and outflow of lactate. The present study provides a deeper insight into the hepatic actions of GKAs and uncovers the potential benefits and risks of GKA for treatment of diabetes. GKA improved hepatic bioenergetics, ureagenesis and glycogenesis, but decreased gluconeogenesis with a potential risk of lactic acidosis and fatty liver.
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Abstract
LC with atmospheric pressure ionization MS is essential to a large number of quantitative bioanalyses for a variety of compounds, especially nonvolatile or highly polar compounds. However, in many instances, weak ionization, poor LC retention and instability of certain analytes hinder the development of the LC–MS/MS method. Chemical derivatization has been used for different classes of analytes to improve their ionization efficiency, chromatographic separation and chemical stability. This work presents an overview of chemical derivatization methods that have been applied to the quantitative LC–MS/MS analyses of nine classes of molecules, including aldehydes, amino acids, bisphosphonate drugs, carbohydrates, carboxylic acids, nucleosides and their associated analogs, steroids, thiol-containing compounds and vitamin D metabolites, in biological matrices.
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Luan HM, Wang LC, Wu H, Jin Y, Ji J. Antioxidant activities and antioxidative components in the surf clam,Mactra veneriformis. Nat Prod Res 2011; 25:1838-48. [DOI: 10.1080/14786419.2010.530268] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Wang C, Fan W, Zhang P, Wang Z, Huang L. One-pot nonreductive O-glycan release and labeling with 1-phenyl-3-methyl-5-pyrazolone followed by ESI-MS analysis. Proteomics 2011; 11:4229-42. [PMID: 21956845 DOI: 10.1002/pmic.201000677] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2010] [Revised: 07/21/2011] [Accepted: 08/18/2011] [Indexed: 11/06/2022]
Abstract
A novel one-pot procedure for the nonreductive release of O-linked glycans from glycoproteins and the simultaneous derivatization of released glycans with 1-phenyl-3-methyl-5-pyrazolone (PMP) is described. Unlike the traditional reductive β-elimination, which produces alditols, this new method employs PMP/ammonia aqueous solution as the reaction medium. The O-glycans are released from glycoproteins and derivatized with PMP nonreductively, specifically, and quantitatively. Samples can be easily purified from ammonia, excess PMP, and peptide residues by evaporation, chloroform extraction, and solid-phase extraction (SPE) column fractionation for HPLC, CE, or MS analysis. The procedure has been elaborated with two purified glycoproteins, porcine stomach mucin and bovine fetuin, and successfully applied to O-glycan profiling of a challenging biological specimen, healthy human plasma. This new procedure has shown methodological significance in O-glycan analysis.
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Affiliation(s)
- Chengjian Wang
- Educational Ministry Key Laboratory of Resource Biology and Biotechnology in Western China, Life Science College, Northwest University, Xi'an, PR China
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McRae G, Monreal CM. LC-MS/MS quantitative analysis of reducing carbohydrates in soil solutions extracted from crop rhizospheres. Anal Bioanal Chem 2011; 400:2205-15. [DOI: 10.1007/s00216-011-4940-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 03/07/2011] [Accepted: 03/20/2011] [Indexed: 11/27/2022]
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Kumar AP, Nandini CD, Salimath PV. Structural characterization of N-linked oligosaccharides of laminin from rat kidney: changes during diabetes and modulation by dietary fiber and butyric acid. FEBS J 2010; 278:143-55. [PMID: 21126316 DOI: 10.1111/j.1742-4658.2010.07940.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Carbohydrates of laminin, a family of large multidomain glycoproteins, have been implicated in various cellular activities including maintaining the protein structure, its function and also basement membrane integrity. During the course of our investigation, we observed that purified laminin from kidneys of control, diabetic, and dietary fiber- and butyric acid-treated diabetic rats showed differences in binding to extracellular matrix components. This prompted us to determine whether there are structural changes in laminin oligosaccharides. In this study, we have characterized a few major N-linked oligosaccharides isolated from purified laminin in various experimental groups, viz. normal, diabetic and diabetic rats fed with dietary fiber and butyric acid. Sugar composition, as identified by GLC, revealed the presence of mannose, galactose and N-acetylglucosamine. In order to study fine structures of the oligosaccharides, N-linked oligosaccharides of laminin were released by Peptide-N-glycosidase F digestion, end-labeled with 2-anthranilic acid and fractionated by lectin affinity chromatography. Furthermore, structural elucidation carried out by MALDI-TOF MS/MS analysis showed variations in the oligosaccharide sequence of laminin during diabetes which were altered by the feeding of dietary fiber and butyric acid.
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Affiliation(s)
- Adishesha Puneeth Kumar
- Department of Biochemistry and Nutrition, Central Food Technological Research Institute, Mysore, Karnataka, India
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Gatti R, Andreatta P, Gioia MG, Boschetti S. A SIMPLE AND VALIDATED LC METHOD FOR THE SIMULTANEOUS ANALYSIS OF GLUCOSAMINE AND CHONDROITIN SULFATE EQUIVALENT IN DIETARY PRODUCTS. J LIQ CHROMATOGR R T 2010. [DOI: 10.1080/10826076.2010.526829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rita Gatti
- a University of Bologna , Department of Pharmaceutical Science , Bologna, Italy
| | - Paolo Andreatta
- b E-Pharma Trento S.P.A., Research and Development , Ravina (TN), Italy
| | - Maria G. Gioia
- c University of Bologna, Faculty of Pharmacy , Bologna, Italy
| | - Silvia Boschetti
- b E-Pharma Trento S.P.A., Research and Development , Ravina (TN), Italy
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Kim HJ, Kang SY, Park JJ, Kim P. Novel Activity of UDP-Galactose-4-Epimerase for Free Monosaccharide and Activity Improvement by Active Site-Saturation Mutagenesis. Appl Biochem Biotechnol 2010; 163:444-51. [DOI: 10.1007/s12010-010-9052-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Accepted: 07/25/2010] [Indexed: 11/28/2022]
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Zhang P, Wang Z, Xie M, Nie W, Huang L. Detection of carbohydrates using a pre-column derivatization reagent 1-(4-isopropyl) phenyl-3-methyl-5-pyrazolone by high-performance liquid chromatography coupled with electrospray ionization mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2010; 878:1135-44. [DOI: 10.1016/j.jchromb.2010.03.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 03/16/2010] [Accepted: 03/16/2010] [Indexed: 11/25/2022]
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29
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Densitometric determination of carbohydrates: Application to purification and molecular weight determination of polysaccharide from Hericium erinaceum mushroom. Food Res Int 2010. [DOI: 10.1016/j.foodres.2010.01.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Sun Z, Song C, Xia L, Wang X, Suo Y, You J. Comprehensive Comparisons between 1-Phenyl-3-methyl-5-pyrazolones, 1-(4-Methoxyphenyl)-3-methyl-5-pyrazolones and 1-(2-Naphthyl)-3-methyl-5-pyrazolones as Labeling Reagents Used in LC-DAD-ESI-MS-MS Analysis of Neutral Aldoses and Uronic Acids. Chromatographia 2010. [DOI: 10.1365/s10337-010-1570-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Guan J, Li S. Discrimination of polysaccharides from traditional Chinese medicines using saccharide mapping—Enzymatic digestion followed by chromatographic analysis. J Pharm Biomed Anal 2010; 51:590-8. [DOI: 10.1016/j.jpba.2009.09.026] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 09/13/2009] [Accepted: 09/19/2009] [Indexed: 11/25/2022]
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Abstract
The O-glycosylation of Ser and Thr by N-acetylgalactosamine-linked (mucin-type) oligosaccharides is often overlooked in protein analysis. Three characteristics make O-linked glycosylation more difficult to analyse than N-linked glycosylation, namely: (a) no amino acid consensus sequence is known; (b) there is no universal enzyme for the release of O-glycans from the protein backbone; and (c) the density and number of occupied sites may be very high. For significant biological conclusions to be drawn, the complete picture of O-linked glycosylation on a protein needs to be determined. This review specifically addresses the analytical approaches that have been used, and the challenges remaining, in the characterization of both the composition and structure of mucin-type O-glycans, and the determination of the occupancy and heterogeneity at each amino acid attachment site.
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Affiliation(s)
- Pia H Jensen
- Department of Chemistry and Biomolecular Sciences, Faculty of Science, Biomolecular Frontiers Research Centre, Macquarie University, Sydney, Australia
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Analysis of Mixture of Maltooligoses Using MALDI-TOFMS: Influence of Cationizing Agent Types. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.11.2806] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Physicochemical properties of a new group of regulatory proteins isolated from various mammal tissues. Russ Chem Bull 2009. [DOI: 10.1007/s11172-009-0069-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Joo KM, Park CW, Jeong HJ, Lee SJ, Chang IS. Simultaneous determination of two Amadori compounds in Korean red ginseng (Panax ginseng) extracts and rat plasma by high-performance anion-exchange chromatography with pulsed amperometric detection. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 865:159-66. [PMID: 18329967 DOI: 10.1016/j.jchromb.2008.02.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 02/13/2008] [Accepted: 02/19/2008] [Indexed: 11/18/2022]
Abstract
A new simple, rapid and sensitive high-performance anion-exchange chromatography method with pulsed amperometric detection (HPAEC-PAD) was developed and validated for the simultaneous determination of two Amadori compounds, arginyl-fructose and arginyl-fructosyl-glucose in Korean red ginseng (Panax ginseng) extracts, rat plasma. Separation of the two target analytes was efficiently undertaken on CarboPac PA1 anion-exchange column with isocratic elution (400 mM sodium hydroxide and deionized water (90:10, v/v)) at flow rate 0.7 mL/min within 15 min of single chromatographic run. Under optimized conditions, the detection limits (signal-to-noise ratio equal to 3) were 20 and 25 ng/mL for arginyl-fructose and arginyl-fructosyl-glucose, respectively. Calibration curves of peak area for the two analytes were linear over three orders of magnitude with a correlation coefficients greater than 0.999. The accuracy of the method was tested by recovery measurement of the spiked samples which yielded good results of 94.15-102.62%. This method was successfully applied to the quantification of arginyl-fructose and arginyl-fructosyl-glucose in herbal extracts and in the plasma samples from rat.
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Affiliation(s)
- Kyung-Mi Joo
- Skin Research Institute, Amorepacific Corporation R&D Center, 314-1 Bora-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do 446-729, Republic of Korea.
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You J, Sheng X, Ding C, Sun Z, Suo Y, Wang H, Li Y. Detection of carbohydrates using new labeling reagent 1-(2-naphthyl)-3-methyl-5-pyrazolone by capillary zone electrophoresis with absorbance (UV). Anal Chim Acta 2007; 609:66-75. [PMID: 18243875 DOI: 10.1016/j.aca.2007.12.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2007] [Revised: 12/09/2007] [Accepted: 12/16/2007] [Indexed: 10/22/2022]
Abstract
A novel labeling reagent 1-(2-naphthyl)-3-methyl-5-pyrazolone (NMP) coupled with capillary electrophoresis (CE) with DAD detection for the determination of carbohydrates has been developed. The chromophore in the 1-phenyl-3-methyl-5-pyrazolone (PMP) reagent is replaced by naphthyl functional group, which results in a reagent with very high molar absorptivity (epsilon251 nm = 5.58 x 10(4) L mol(-1) cm(-1)). This permits NMP-labeled carbohydrates to be detected with UV absorbance in standard 50-mum-i.d. fused silica capillaries by zone electrophoresis. In this mode, nanomolar concentrations of detection limits are obtained. The method for the derivatization of carbohydrates with NMP is simplified. The derivatization reaction is rapid and mild in the presence of ammonia catalyst without further transfer steps. Nine monosaccharide derivatives such as mannose, galacturonic acid, glucuronic acid, rhamnose, glucose, galactose, xylose, arabinose and fucose can successfully be detected in CE mode. Good reproducibility can be obtained with relative standard deviation (R.S.D.) values of the migration times and peak area, respectively, from 0.44 to 0.48 and from 3.2 to 4.8. Furthermore, the developed method has been successfully applied to the analysis of carbohydrates in the hydrolyzed rape bee pollen samples.
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Affiliation(s)
- Jinmao You
- Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, PR China.
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38
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Cabálková J, Wahlund KG, Chmelík J. Complex analytical approach to characterization of the influence of carbon dioxide concentration on carbohydrate composition in Norway spruce needles. J Chromatogr A 2007; 1148:189-99. [PMID: 17382335 DOI: 10.1016/j.chroma.2007.03.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Revised: 03/07/2007] [Accepted: 03/09/2007] [Indexed: 10/23/2022]
Abstract
Water-soluble non-structural carbohydrates (NSC) in the needles of Norway spruce Picea abies [L.] Karst have been studied by using a combination of several separation techniques, having various detectors, with mass spectrometry. The intent was to find a suitable methodology that enables the characterization and determination of NSC, covering a wide range of molar masses, and being suitable to assess how NCS are influenced by both external conditions, e.g. different carbon dioxide (CO(2)) concentrations, light intensity, and by internal conditions such as the needle age. The techniques were liquid-liquid extraction, high performance liquid chromatography (HPLC), size exclusion chromatography (SEC), asymmetrical flow field-flow fractionation (AsFlFFF), electrospray ionization mass spectrometry (ESI-MS), and matrix assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). NSC were extracted by a methanol/chloroform/water mixture into the water-rich phase. Application of AsFlFFF and SEC, using refractive index (RI) and multi-angle light scattering (MALS) detectors to the water-rich extracts resulted in three or four main fractions covering molar masses from 10(3) to 10(6)g/mol. Individual fractions collected from SEC were directly subjected to both MALDI and ESI-MS analysis in order to identify NSC. MALDI mass spectra confirmed the presence of hexose oligomers in individual fractions while ESI-MS was used for evaluation of low mass NSC. HPLC-RI was used for quantification of NSC and predominant carbohydrates were found to be fructose, glucose, and sucrose. The changes in their content during seasonal course were studied in detail. HPLC coupled to ESI-MS enabled the identification of low concentration NSC like raffinose that occurred in the needles of autumn samplings. An influence of the increased CO(2) concentration on sucrose and glucose accumulation was observed and it was found that the light intensity as well as the needle age has significant influence on the sucrose content.
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Affiliation(s)
- Jana Cabálková
- Institute of Analytical Chemistry v.v.i., Academy of Sciences of the Czech Republic, Department of Proteomics, Veverí 97, Brno CZ-60200, Czech Republic.
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Jeong JS, Yoon HR, Hong SP. Development of a new diagnostic method for galactosemia by high-performance anion-exchange chromatography with pulsed amperometric detection. J Chromatogr A 2006; 1140:157-62. [PMID: 17161845 DOI: 10.1016/j.chroma.2006.11.085] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2006] [Revised: 11/27/2006] [Accepted: 11/28/2006] [Indexed: 10/23/2022]
Abstract
We developed a new non-derivatization analytical method for the determination of galactose in the diagnosis of galactosemia by high-performance anion-exchange chromatography (HPAEC)-pulsed amperometric detection (PAD). With an anion-exchange column, the analytes were separated efficiently using 3mM NaOH containing 1mM NaOAc, and 200mM NaOH was added for post-column reagent. The limit of detection (S/N=3) and limit of quantification (S/N=10) for galactose were 25ng/mL and 83ng/mL, respectively. Linear dynamic range was from 4.67mg/dL to 53.46mg/dL (r(2)=0.9999). The mean recovery of galactose for intra-, inter-day assays were found to be of satisfactory results (98.14-101.42%).
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Affiliation(s)
- Ji-Seon Jeong
- Department of Oriental Pharmaceutical Sciences, Kyung Hee University, Dongdaemoon-gu Hoegi-dong #1, Seoul 130-701, South Korea
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Ikegami T, Fujita H, Horie K, Hosoya K, Tanaka N. HILIC mode separation of polar compounds by monolithic silica capillary columns coated with polyacrylamide. Anal Bioanal Chem 2006; 386:578-85. [PMID: 16953325 DOI: 10.1007/s00216-006-0606-z] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2006] [Revised: 05/23/2006] [Accepted: 06/08/2006] [Indexed: 11/29/2022]
Abstract
HILIC mode columns were prepared by an on-column polymerization of acrylamide on a monolithic silica capillary column modified with N-(3-trimethoxysilylpropyl)methacrylamide as the anchor group. The products showed HILIC mode retention characteristics with three times greater permeability and slightly higher column efficiency compared to a commercially available amide-type HILIC column packed with 5-mum particles. The selectivity of the monolithic silica-based column was similar to that of the particulate column for each group of solutes towards nucleosides, nucleic bases and carbohydrate derivatives, although a considerable difference was observed in the selectivity for the solute groups. Although the retention of solutes based on the polar functionality was much smaller with the monolithic silica columns, which had a smaller phase ratio, than with the particle-packed column, the former can achieve better separation utilizing the high permeability and higher column efficiencies of a longer column.
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Affiliation(s)
- Tohru Ikegami
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, Japan.
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Zaikin VG, Halket JM. Derivatization in mass spectrometry--8. Soft ionization mass spectrometry of small molecules. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2006; 12:79-115. [PMID: 16723751 DOI: 10.1255/ejms.798] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
This is the first of two reviews devoted to derivatization approaches for "soft" ionization mass spectrometry (FAB, MALDI, ESI, APCI) and deals, in particular, with small molecules. The principles of the main "soft" ionization mass spectrometric methods as well as the reasons for derivatizing small molecules are briefly described. Derivatization methods for modification of amines, carboxylic acids, amino acids, alcohols, carbonyl compounds, monosaccharides, thiols, unsaturated and aromatic compounds etc. to improve their ionizability and to enhance structure information content are discussed. The use of "fixed"-charge bearing derivatization reagents is especially emphasized. Chemical aspects of derivatization and "soft" ionization mass spectrometric properties of derivatives are considered.
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Affiliation(s)
- Vladimir G Zaikin
- Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prospect 29, 119991Moscow, Russia.
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Pan GG, Melton LD. Analysis of sialyl oligosaccharides by high-performance liquid chromatography-electrospray ionisation-mass spectrometry with differentiation of α2-3 and α2-6 sialyl linkages. J Chromatogr A 2005; 1077:136-42. [PMID: 16001549 DOI: 10.1016/j.chroma.2005.04.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A method for analysing sialyl oligosaccharides from bovine colostrum using high-performance liquid chromatography-electrospray ionisation-mass spectrometry (HPLC-ESI-MS) is described. Under positive ionisation mode, mass spectra of alpha2-3 and alpha2-6 linkages were different, and the former produced a prominent B2 (or B3 in disialyl lactose) mass fragment. This fragment was absent from mass spectra with alpha2-6 linkages. Two sialyl oligosaccharides, which have not been reported previously, were tentatively identified. One comprises a N-acetyl neuraminic acid (Neu5Ac), two hexoses (Hex), and one N-acetyl hexosamine (HexNAc) residue ((Neu5Ac)1 (Hex)2 (HexNAc)1), and the other comprises one Neu5Ac and one Hex residue ((Neu5Ac)1(Hex)1).
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Affiliation(s)
- Geoffrey Ge Pan
- Food Science Programmes, Department of Chemistry, The University of Auckland, 23 Symonds Rd., Down Town Auckland, Private Bag 92019, Auckland, New Zealand
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Lattová E, Snovida S, Perreault H, Krokhin O. Influence of the labeling group on ionization and fragmentation of carbohydrates in mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2005; 16:683-696. [PMID: 15862770 DOI: 10.1016/j.jasms.2005.01.021] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2004] [Revised: 01/24/2005] [Accepted: 01/24/2005] [Indexed: 05/24/2023]
Abstract
The ionization and fragmentation behaviors of carbohydrate derivatives prepared by reaction with 2-aminobenzamide (AB), 1-phenyl-3-methyl-5-pyrazolone (PMP), and phenylhydrazine (PHN) were compared under identical mass spectrometric conditions. It has been shown that the intensities of signals in MS spectra depend on the kind of saccharides investigated and reducing end labels used. PMP sialyllactose, when ionized by ESI/MALDI, produced a mixture of [M + H]+, [M + Na]+, [M - H + 2Na]+ ions in the positive mode and [M - H]-, [M + Na - 2H]- ions in the negative mode. The AB and PHN derivatives formed abundant [M + H]+ and [M - H]- ions in ESI, and by matrix-assisted laser desorption/ionization (MALDI) produced abundant [M + Na]+ ions. PMP- and reduced AB-sialyllactose produced only Y-type fragment ions under both MS/MS sources. In the electrospray ionization (ESI)-MS/MS spectrum of PHN-sialyllactose, abundant ions corresponded to B, Z cleavages and in its MALDI-MS/MS spectrum, the abundant ions were consistent with Y glycosidic cleavages with the concurrence of B, C, and cross-ring fragment ions. In the MALDI-MS spectra of oligosaccharides acquired immediately after derivatization, it was possible to detect only PHN derivatives. After purification, spectra of all three types of derivatives showed high signal-to-noise ratios with the most abundant ions observed for AB reduced saccharides. [M + Na]+ ions were the dominant products and their fragmentation patterns were influenced by the type of the labeling and the kind of oligosaccharide considered. In the MALDI-PSD and -MS/MS spectra of AB-derivatized glycans, higher m/z fragment ions corresponded to B and Y cleavages and the loss of bisecting GlcNAc appeared as a weak signal or was not detected at all. Fragmentation patterns observed in the spectra of hybrid/complex PHN and PMP glycans were more comparable-higher m/z fragments corresponded to B and C glycosidic cleavages. For PHN glycans, the abundance of ions resulting from the loss of bisecting GlcNAc depended on the number of residues linked to the 6-positioned mannose. Also, PHN and PMP derivatives produced cross-ring cleavages with abundances higher than observed in the spectra of AB derivatized oligosaccharides. For high-mannose glycans, the most informative cleavages were provided by AB and PHN type of labeling. Here, PMP produced dominant Y-cleavages from the chitobiose while other ions produced weak signals.
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Affiliation(s)
- Erika Lattová
- Department of Chemistry, University of Manitoba, Winnipeg, Manitoba, Canada
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Bindila L, Peter-Katalinić J, Zamfir A. Sheathless reverse-polarity capillary electrophoresis-electrospray-mass spectrometry for analysis of underivatized glycoconjugates. Electrophoresis 2005; 26:1488-99. [PMID: 15765473 DOI: 10.1002/elps.200410307] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
We report on the development of a novel methodology to extend the limits of capillary electrophoresis-electrospray ionization-mass spectrometry (CE-ESI-MS) general applicability. A sheathless on-line CE-ESI-MS setup was optimized on standard monosaccharide mixture to operate in reverse polarity and negative ion mode for MS detection without pressure to assist the sample migration, coating of the capillaries, and/or sample derivatization. This approach was further applied for screening of a complex glycopeptide mixture obtained from the urine of a patient diagnosed with N-acetylhexosaminidase deficiency, known as Schindler's disease. The potential of this methodology in terms of high sensitivity, separation efficiency, resolution, and reproducibility is demonstrated. In combination with the high quality of MS data, a new, significantly improved insight into the sample heterogeneity is possible.
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Affiliation(s)
- Laura Bindila
- Institute for Medical Physics and Biophysics, University of Münster, Münster, Germany
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45
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Liu DQ, Hop CECA. Strategies for characterization of drug metabolites using liquid chromatography–tandem mass spectrometry in conjunction with chemical derivatization and on-line H/D exchange approaches. J Pharm Biomed Anal 2005; 37:1-18. [PMID: 15664738 DOI: 10.1016/j.jpba.2004.09.003] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2004] [Accepted: 09/01/2004] [Indexed: 11/23/2022]
Abstract
Strategies using high performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) in conjunction with techniques such as chemical derivatization and on-line hydrogen/deuterium (H/D) exchange for structural elucidation of drug metabolites in crude samples are reviewed. Useful mass spectrometric scan techniques discussed include product ion scan, constant neutral-loss scan, precursor ion scan, multistage MS(n), and accurate mass measurements. In biological systems, xenobiotics are transformed into metabolites, which usually involves introduction of one or more polar functional groups or removal or blockage of such structural moieties. Therefore, chemical derivatization strategies for determination of functional groups and on-line H/D exchange approaches for probing number of exchangeable hydrogens are powerful tools for structural elucidation of drug metabolites in drug metabolism studies. More importantly, these experiments can be carried out on crude samples in microscale, providing sufficient material for LC-MS/MS analysis. Therefore, labor intensive and technically challenging purification of low levels of drug metabolites from complex biological matrices can be avoided. It is the authors' conclusion that strategies such as chemical derivatization and on-line H/D exchange should be used more routinely in drug metabolism studies in order to facilitate metabolite identification.
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Affiliation(s)
- David Q Liu
- Analytical Sciences, GlaxoSmithKline, UW2940, P.O. Box 1539, 709 Swedeland Road, King of Prussia, PA 19406, USA.
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Morelle W, Slomianny MC, Diemer H, Schaeffer C, van Dorsselaer A, Michalski JC. Structural characterization of 2-aminobenzamide-derivatized oligosaccharides using a matrix-assisted laser desorption/ionization two-stage time-of-flight tandem mass spectrometer. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:2075-84. [PMID: 15988715 DOI: 10.1002/rcm.2033] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Oligosaccharides were derivatized by reductive amination using 2-aminobenzamide (2-AB) and analyzed by matrix-assisted laser desorption/ionization two-stage time-of-flight (MALDI-TOF/TOF) tandem mass spectrometry (MS/MS) in the positive ion mode. The major signals were obtained under these conditions from the [M+Na]+ ions for all 2-AB-derivatized oligosaccharides. A systematic study was conducted on a series of 2-AB-derivatized oligosaccharides to allow rationalization of the fragmentation processes. The MALDI-TOF/TOF-MS/MS spectra of the [M+Na]+ ions of 2-AB-derivatized oligosaccharides were dominated by glycosidic cleavages. These fragments originating both from the reducing and the non-reducing ends of the oligosaccharide yield information on sequence and branching. Moreover, the MALDI-TOF/TOF-MS/MS spectra were also characterized by abundant cross-ring fragments which are very informative on the linkages of the monosaccharide residues constituting these oligosaccharides. MALDI-TOF/TOF-MS/MS analysis of 2-AB-derivatized oligosaccharides, by providing structural information at the low-picomole level, appears to be a powerful tool for carbohydrate structural analysis.
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Affiliation(s)
- Willy Morelle
- Unité Mixte de Recherche CNRS/USTL 8576, "Glycobiologie Structurale et Fonctionnelle", IFR 118, Université des Sciences et Technologies de Lille 1, 59655 Villeneuve d'Ascq Cedex, France.
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Guddat S, Thevis M, Schänzer W. Identification and quantification of the plasma volume expander dextran in human urine by liquid chromatography-tandem mass spectrometry of enzymatically derived Isomaltose. Biomed Chromatogr 2005; 19:743-50. [PMID: 15856492 DOI: 10.1002/bmc.509] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Plasma volume expanders are used in sports in order to control haematological parameters and/or to mask erythropoietin (EPO) misuse. A reliable method based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed for doping control purposes, enabling the identification and quantification of the plasma volume expander dextran in human urine. The dextran polymer was enzymatically hydrolysed by alpha-1,6-glucosidase (dextranase) followed by acetylation of the generated isomaltose subunits, allowing the chromatographic separation of different disaccharides, such as lactose, saccharose and isomaltose, as well as the identification and quantification of the analyte in human urine. The method was used to determine the basal concentration of isomaltose resulting from the enzymatic hydrolysis of polymeric 1,6-linked glucose in 238 routine doping control samples. In addition the concentration of dextran measured as isomaltose was estimated in seven urine specimens obtained from patients treated with dextran. Calibration curves for dextran were linear and reproducible. The inter- and intra-assay coefficients of variation for dextran ranged from 4.9 to 7.3% at three concentration levels between 53 and 1186 microg/mL. Recovery ranged from 97 to 112% (mean 106.9%). The assay limit of detection was 3.8 microg/mL and the lower limit of quantification was 12.5 microg/mL. In 96% of the investigated doping control samples, the concentrations of isomaltose were below the LLOQ of 12.5 microg/mL. Even the highest concentrations were approximately 100-300-fold lower than concentrations found in urine samples of patients after intravenous application of dextran. The presented results demonstrate the capability and reliability of the developed LC-MS/MS method for the identification and quantification of dextran in human urine and can be regarded as a method revealing the misuse of dextran in sports.
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Affiliation(s)
- Sven Guddat
- Institute of Biochemistry, German Sport University, Cologne, Germany.
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Liang HR, Takagaki T, Foltz RL, Bennett P. Quantitative determination of endogenous sorbitol and fructose in human nerve tissues by atmospheric-pressure chemical ionization liquid chromatography/tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:2284-94. [PMID: 16034846 DOI: 10.1002/rcm.2055] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Attachment of anions to sorbitol and fructose has been shown to enhance sensitivity in both electrospray ionization (ESI) and atmospheric-pressure chemical ionization (APCI) mass spectrometry. The post-column addition of CHCl3 produced Cl-adducts of sorbitol and fructose but their signals were suppressed due to the elevated background. Different chlorinated compounds and different additive methods were systematically investigated to form more abundant Cl-adduct precursor ions and deprotonated product ions. The major causes of the high background were explored and effective methods were developed to improve the signal-to-noise ratios and reproducibility. The compositions of mobile phase, percentages of organic modifiers (MeCN, MeOH and water), columns, oven temperature, flow rates and different gradients were investigated to separate sorbitol from fructose along with their isomers including glucose, galactose, mannose, sorbose, mannitol, and dulcitol. The optimized separation was achieved on a Luna 5 mu NH2 100A column (150 x 4.6 mm) using a mobile phase containing MeCN with 0.1% of CH2Cl2 and 50% MeOH in water at a flow rate of 800 microL/min and an oven temperature of 40 degrees C using a gradient liquid chromatography (LC) system. Human nerve tissue samples were extracted by protein precipitation followed by mixed-mode solid-phase extraction. The LC/ESI-MS/MS method produced higher peak intensities than LC/APCI-MS/MS. However, there were matrix effects from extracted tissues in LC/ESI-MS/MS but not in LC/APCI-MS/MS. Consequently, APCI proved to be the more effective method of ionization. Then the LC/APCI-MS/MS method was fully validated and successfully applied to analysis of clinical samples. The concentrations of endogenous sorbitol and fructose were determined using calibration curves employing sorbitol-13C6 and fructose-13C6 as surrogate analytes. The method has provided excellent intra- and inter-assay precision and accuracy with linear ranges of 0.2-80 ng/mg for sorbitol and 1-400 ng/mg for fructose in human nerve tissues.
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Affiliation(s)
- H R Liang
- Tandem Labs, A Division of NWT Inc., Salt Lake City, UT, USA.
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Morelle W, Page A, Michalski JC. Electrospray ionization ion trap mass spectrometry for structural characterization of oligosaccharides derivatized with 2-aminobenzamide. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2005; 19:1145-1158. [PMID: 15803514 DOI: 10.1002/rcm.1900] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The use of electrospray ionization (ESI) quadrupole ion trap mass spectrometry and reversed-phase high-performance liquid chromatography (HPLC) for the characterization of 2-aminobenzamide (2AB)-labeled oligosaccharides and N-linked protein oligosaccharide mixtures is described. The major signals were obtained under these conditions from the [M+Na]+ ions for all 2AB-derivatized oligosaccharides. Under collision-induced dissociation, sodiated molecular species generated in the ESI mode yield simple and predictable mass spectra. Tandem mass spectrometry (MS/MS) experiments with orders higher than two offer a number of ways to enhance MS/MS spectra and to derive information not present in MS and MS2 spectra. Information on composition, sequence, branching and, to some extent, interglycosidic linkages can be deduced from fragments resulting from the cleavage of glycosidic bonds and from weak cross-ring cleavage products. Reversed-phase HPLC and derivatization by reductive amination using 2-aminobenzamide were finally applied to characterize a glycan pool enzymatically released from glycoproteins.
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Affiliation(s)
- Willy Morelle
- Unité Mixte de Recherche CNRS/USTL 8576, Glycobiologie Structurale et Fonctionnelle, IFR 118, Université des Sciences et Technologies de Lille 1, Bâtiment C9, 59655 Villeneuve d'Ascq Cedex, France.
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Lattova E, Perreault H, Krokhin O. Matrix-assisted laser desorption/ionization tandem mass spectrometry and post-source decay fragmentation study of phenylhydrazones of N-linked oligosaccharides from ovalbumin. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2004; 15:725-735. [PMID: 15121202 DOI: 10.1016/j.jasms.2004.01.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2003] [Revised: 01/27/2004] [Accepted: 01/27/2004] [Indexed: 05/24/2023]
Abstract
N-linked oligosaccharides were released from hen ovalbumin by PNGase F and derivatized with phenylhydrazine. They were then examined by matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. Phenylhydrazones of N-glycans under MALDI-tandem mass spectrometry (MS/MS) and post-source decay (PSD) conditions produced relatively similar fragmentation patterns; however, more cross-ring cleavages and fragment ions corresponding to low abundance isomeric structures were detected by MS/MS and not in PSD. Most fragment ions corresponded to glycosidic cleavages with preferential loss of residues from the chitobiose core and the 3-antenna. Sialylated phenylhydrazone-N-glycans, characterized here for the first time in ovalbumin by tandem mass spectrometry, underwent losses of sialic acid residues followed the same fragmentation pathways observed with neutral derivatized glycans. The relative abundances of some fragment ions indicated the linkage position of sialic acid and provided information on the number of residues attached to the 6-antenna. Also, new structures of ovalbumin glycans were observed as part of this study and are reported here.
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Affiliation(s)
- Erika Lattova
- Chemistry Department, University of Manitoba, Winnipeg, Manitoba, Canada
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