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Daramola O, Gautam S, Gutierrez Reyes CD, Fowowe M, Onigbinde S, Nwaiwu J, Mechref Y. LC-MS/MS of isomeric N-and O-glycopeptides on mesoporous graphitized carbon column. Anal Chim Acta 2024; 1317:342907. [PMID: 39030008 DOI: 10.1016/j.aca.2024.342907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 05/29/2024] [Accepted: 06/23/2024] [Indexed: 07/21/2024]
Abstract
BACKGROUND The study of glycopeptides is associated with challenges regarding the microheterogeneity of different isomeric glycans occupying the same glycosylation sites in glycoproteins. It is immensely valuable to perform both qualitative and quantitative site-specific glycosylation analysis of glycopeptide isomers due to their link to several diseases. Achieving isomeric separation of glycopeptides is particularly challenging due to the low abundance of glycopeptides as well as inefficient ionization. Although some methods have demonstrated the isomeric separation of glycopeptides, a more efficient nanoflow-based stationary phase is needed for the isomeric separation of both N- and O-glycopeptides. RESULTS In this study, the separation of N- and O-glycopeptide isomers at 75 °C was achieved with an in-house packed 1 cm long mesoporous graphitized carbon (MGC) column. Different gradient compositions of the optimized mobile phase for separating permethylated glycans on MGC column were tested, and we observed efficient separation of N- and O-glycopeptide isomers at a gradient elution time of 120 min. After achieving the isomeric separation of sialylated glycopeptides from model glycoproteins derived from bovine fetuin, the separation of isomeric glycopeptides derived from asialofetuin, α-1 glycoprotein and human blood serum were also demonstrated. Furthermore, the developed method for the separation of isomeric N- and O-glycopeptide on MGC column showed high reproducibility over three months. We observed an average retention time shift of 1 min and consistent resolution of separated peaks throughout three months. SIGNIFICANCE AND NOVELTY MGC column can serve as an efficient tool for obtaining the isomeric separation of N- and O-glycopeptide from complex biological samples in future studies. This will enable a more profound understanding of the roles played by isomeric N- and O-glycopeptide in important biological processes and their correlations to various disease progressions.
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Affiliation(s)
- Oluwatosin Daramola
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Sakshi Gautam
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | | | - Mojibola Fowowe
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Sherifdeen Onigbinde
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Judith Nwaiwu
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA.
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2
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Li Z, Zhang N, Dong Z, Wang X, Zhou J, Gao J, Yang Y, Li J, Guan F, Zhou Y, Tan Z. Integrating transcriptomics, glycomics and glycoproteomics to characterize hepatitis B virus-associated hepatocellular carcinoma. Cell Commun Signal 2024; 22:200. [PMID: 38561745 PMCID: PMC10983713 DOI: 10.1186/s12964-024-01569-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 03/12/2024] [Indexed: 04/04/2024] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) ranks as the third most common cause of cancer related death globally, representing a substantial challenge to global healthcare systems. In China, the primary risk factor for HCC is the hepatitis B virus (HBV). Aberrant serum glycoconjugate levels have long been linked to the progression of HBV-associated HCC (HBV-HCC). Nevertheless, few study systematically explored the dysregulation of glycoconjugates in the progression of HBV-associated HCC and their potency as the diagnostic and prognostic biomarker. METHODS An integrated strategy that combined transcriptomics, glycomics, and glycoproteomics was employed to comprehensively investigate the dynamic alterations in glyco-genes, N-glycans, and glycoproteins in the progression of HBV- HCC. RESULTS Bioinformatic analysis of Gene Expression Omnibus (GEO) datasets uncovered dysregulation of fucosyltransferases (FUTs) in liver tissues from HCC patients compared to adjacent tissues. Glycomic analysis indicated an elevated level of fucosylated N-glycans, especially a progressive increase in fucosylation levels on IgA1 and IgG2 determined by glycoproteomic analysis. CONCLUSIONS The findings indicate that the abnormal fucosylation plays a pivotal role in the progression of HBV-HCC. Systematic and integrative multi-omic analysis is anticipated to facilitate the discovery of aberrant glycoconjugates in tumor progression.
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Affiliation(s)
- Zhuo Li
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710077, P.R. China
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China
| | - Na Zhang
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710077, P.R. China
| | - Zewen Dong
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China
| | - Xin Wang
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710077, P.R. China
| | - Jian Zhou
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710077, P.R. China
| | - Juan Gao
- Department of Laboratory Medicine, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi, 710077, P.R. China
| | - Yunyun Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China
| | - Jing Li
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China
| | - Feng Guan
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China
| | - Yue Zhou
- Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, P.R. China.
| | - Zengqi Tan
- Institute of Hematology, Provincial Key Laboratory of Biotechnology, School of Medicine, Northwest University, Xi'an, Shaanxi, 710069, P.R. China.
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3
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Díaz-Martínez I, Miranda-Castro R, de-Los-Santos-Álvarez N, Lobo-Castañón MJ. Lectin-Mimicking Aptamer as a Generic Glycan Receptor for Sensitive Detection of Glycoproteins Associated with Cancer. Anal Chem 2024. [PMID: 38331397 PMCID: PMC10882573 DOI: 10.1021/acs.analchem.3c05891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
The shortage of specific glycan recognition reagents has proven a significant hurdle in the development of assays to detect altered glycoforms associated with cancer. Here, a carbohydrate-binding aptamer originally selected against the glycan moiety of prostate-specific antigen (PSA) is used as a lectin-mimicking reagent. As a first proof-of-principle, this aptamer has been applied to develop a sandwich-type electrochemical biosensor for the detection of the serum amyloid P (SAP) component, a glycosylated protein whose increased sialylation has been associated with pancreatic cancer. The assay combines a specific antibody for this potential tumor biomarker and the aptamer as capture and detection receptors, respectively. Two oriented antibody immobilization approaches, protein A-based and boronic ester-based attachment to self-assembled monolayers built onto gold surfaces, were comparatively evaluated, the latter being able to circumvent the unwanted interaction between the aptamer and the glycans on the electrode-attached antibody. The resulting biosensing platform allows the detection of the SAP glycoprotein at levels of nanograms per milliliter with a reproducibility value lower than 20%, both in aqueous buffer and in serum. This work represents a proof-of-concept of a promiscuous ligand of proteins with high levels of sialylated glycans typically produced by cancer cells.
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Affiliation(s)
- Inés Díaz-Martínez
- Departamento de Química Física y Analítica. Universidad de Oviedo, Av. Julián Clavería 8, 33006 Oviedo, Spain
| | - Rebeca Miranda-Castro
- Departamento de Química Física y Analítica. Universidad de Oviedo, Av. Julián Clavería 8, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Av. de Roma, 33011 Oviedo, Spain
| | - Noemí de-Los-Santos-Álvarez
- Departamento de Química Física y Analítica. Universidad de Oviedo, Av. Julián Clavería 8, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Av. de Roma, 33011 Oviedo, Spain
| | - María Jesús Lobo-Castañón
- Departamento de Química Física y Analítica. Universidad de Oviedo, Av. Julián Clavería 8, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias, Av. de Roma, 33011 Oviedo, Spain
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4
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Feng X, Shu H, Zhang S, Peng Y, Zhang L, Cao X, Wei L, Lu H. Relative Quantification of N-Glycopeptide Sialic Acid Linkage Isomers by Ion Mobility Mass Spectrometry. Anal Chem 2021; 93:15617-15625. [PMID: 34779613 DOI: 10.1021/acs.analchem.1c02803] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Sialic acids decorate the surface of glycoproteins and play important roles in a variety of pathological processes. Although the mass spectrometry (MS) based linkage-specific analysis of sialylated N-glycopeptide is developing rapidly, quantitative analysis of these isomers still remains a challenge. Herein, we reported a novel quantitative strategy that can unambiguously identify and relatively quantify linkage-specific N-glycopeptides using ion mobility mass spectrometry (IM-MS). Without the assistance of derivatization, this method can relatively quantify sialic acid isomers of intact glycopeptides by using their characteristic fragment ions in IM-MS. Moreover, good linearity (R2 > 0.99) of relative quantification within a dynamic range of 2 orders of magnitude and high reproducibility (coefficient of variation (CV) < 10%, n = 3) were demonstrated. Finally, our results illustrated the aberrant sialylation of haptoglobin (Hp) in hepatocellular carcinoma (HCC), where the ratios of α2,3 to α2,6 sialylation of seven N-glycopeptides were found to be significantly altered (p < 0.01) in HCC individuals (n = 27) compared with healthy controls (n = 27).
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Affiliation(s)
- Xiaoxiao Feng
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China
| | - Hong Shu
- Department of Clinical Laboratory, Cancer Hospital of Guangxi Medical University, Nanning, Guangxi 530021, People's Republic of China
| | - Shu Zhang
- Liver Cancer Institute, Zhongshan Hospital, Key Laboratory of Carcinogenesis and Cancer Invasion (Ministry of Education), Fudan University, Shanghai 200032, People's Republic of China
| | - Ye Peng
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China
| | - Lei Zhang
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China
| | - Xinyi Cao
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China
| | - Liming Wei
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China.,Department of Chemistry & NHC Key Laboratory of Glycoconjugates Research, Fudan University, Shanghai 200032, People's Republic of China
| | - Haojie Lu
- Institutes of Biomedical Sciences & Shanghai Cancer Center, Fudan University, Shanghai 200032, People's Republic of China.,Department of Chemistry & NHC Key Laboratory of Glycoconjugates Research, Fudan University, Shanghai 200032, People's Republic of China
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5
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SHANG S, DONG H, LI Y, ZHANG W, LI H, QIN W, QIAN X. [Large-scale enrichment and identification of human urinary N-glycoproteins/ N-glycopeptides]. Se Pu 2021; 39:686-694. [PMID: 34227365 PMCID: PMC9421575 DOI: 10.3724/sp.j.1123.2021.01039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Indexed: 11/25/2022] Open
Abstract
N-Glycosylation of proteins, an important post-translational modification in eukaryotic cells, plays an essential role in the regulation of cell adhesion, migration, signal transduction, and apoptosis. Abnormal changes in protein glycosylation are closely related to the occurrence of many critical diseases, including diabetes, tumors, and neurological, kidney, and inflammatory diseases. A non-invasive type of liquid biopsy, urine sampling has the advantage of reducing the complexity of proteomic analysis. This facilitates the design of large-scale and continuous or multi-time point sampling strategies. However, the dynamic range of urinary protein abundance is relatively large, owing to individual differences and physiological conditions. Currently, there is a lack of specialized research on individual differences, physiological fluctuations, and physiological abundance ranges of urinary N-glycoproteins in large healthy populations. Therefore, it is difficult to accurately distinguish individual differences and normal physiological fluctuations from changes caused by disease; this poses a great challenge in disease marker research. Liquid chromatography-mass spectrometry (LC-MS) is an analytical technique widely used for the large-scale profiling of proteomes in biological systems, and the enrichment of N-glycopeptides is a prerequisite for their detection by MS.In this study, we established an approach based on hydrophilic interaction chromatography (HILIC) by optimizing the activation, cleaning, and elution processes of the enrichment method, for instance through the optimization of particle size and solvent composition, and investigated the identification number, selectivity, and stability of N-glycoprotein/N-glycopeptide enrichment under different experimental conditions. We found that N-glycoproteins and N-glycopeptides were highly enriched in a trifluoroacetic acid system with 5-μm filling particles in the HILIC column. On this basis, we analyzed the levels of N-glycoproteins/N-glycopeptides in urine samples. The consistency of N-glycoprotein/N-glycopeptide levels in urine samples taken from the same healthy person for five consecutive days was investigated by correlation analysis. This analysis revealed that the urinary N-glycoproteome of the same healthy person was relatively stable over a short period of time. Next, urinary samples from 20 healthy male volunteers and 20 healthy female volunteers were enriched for N-glycoproteins/N-glycopeptides, which were profiled by MS through qualitative and quantitative analyses. Screening and functional analysis of differential proteins were then carried out. A total of 1016 N-glycoproteins and 2192 N-glycopeptides were identified in the mid-morning urine samples of the 40 healthy volunteers. A label-free quantitation strategy was used to investigate the fluctuation range of the physiologically abundant urinary N-glycopeptides. The abundance of urinary N-glycopeptides spanned across approximately five orders of magnitude. Subsequently, gender differences in the N-glycosylation levels of urinary proteins were also explored in healthy people. Functional analysis of the N-glycoproteins that exhibited gender differences in abundance was performed. Based on multivariate statistical analysis, 206 differentially expressed proteins (p<0.05, fold change (FC)> 4) were identified. In females, we found 175 significantly down-regulated N-glycoproteins and 31 significantly up-regulated N-glycoproteins with respect to males. The expression levels of N-glycopeptides between the two groups suggested a clear gender difference. To investigate the biological processes and functions of these proteins, gene ontology (GO) analysis was performed on the N-glycoproteins/N-glycopeptides differentially expressed between males and females. Metabolic pathway analysis was also carried out based on the kyoto encyclopedia of genes and genomes (KEGG). Differentially expressed N-glycoproteins were mostly associated with platelet degranulation, extracellular region, and ossification. The top three relevant pathways were glycan biosynthesis and metabolism, metabolism of cofactors and vitamins, and lipid metabolism. Overall, sex may be an important factor for urinary N-glycoproteome differences among normal individuals and should be considered in clinical applications. This study provides relevant information regarding the function and mechanisms of the urinary glycoproteome and the screening of clinical biomarkers.
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Affiliation(s)
- Shiting SHANG
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Hangyan DONG
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Yuanyuan LI
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Wanjun ZHANG
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Hang LI
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Weijie QIN
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
| | - Xiaohong QIAN
- 军事科学院军事医学研究院生命组学研究所, 北京蛋白质组研究中心, 蛋白质组学国家重点实验室, 北京 102206
- Institute of Lifeomics, Academy of Military Medical Sciences, Academy of Military Sciences, Beijing Proteome Research Center, State Key Laboratory of Proteomics, Beijing 102206, China
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6
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Kim KH, Lee SY, Kim DG, Lee SY, Kim JY, Yoo JS. Absolute Quantification of N-Glycosylation of Alpha-Fetoprotein Using Parallel Reaction Monitoring with Stable Isotope-Labeled N-Glycopeptide as an Internal Standard. Anal Chem 2020; 92:12588-12595. [DOI: 10.1021/acs.analchem.0c02563] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kwang Hoe Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
| | - Sang Yoon Lee
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Dong Geun Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Soo-Youn Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Jin Young Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
| | - Jong Shin Yoo
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, 162 YeonGuDanji-Ro, Ochang-eup, Cheongju 28119, Republic of Korea
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 34134, Republic of Korea
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7
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Zhu R, Huang Y, Zhao J, Zhong J, Mechref Y. Isomeric Separation of N-Glycopeptides Derived from Glycoproteins by Porous Graphitic Carbon (PGC) LC-MS/MS. Anal Chem 2020; 92:9556-9565. [PMID: 32544320 PMCID: PMC7815195 DOI: 10.1021/acs.analchem.0c00668] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Protein glycosylation is involved in many biological processes and physiological functions. Despite the recent advances in LC-MS/MS methodologies, the profiling of site-specific glycosylation is one of the major analytical challenges of glycoprotein analysis. Herein, we report that the separation of glycopeptide isomers on porous graphitic carbon (PGC)-LC was significantly improved by elevating the separation temperature under basic mobile phases. These findings permitted the isomeric separation of glycopeptides resulting from highly specific enzymatic digestions. The selectivity for different glycan types was studied using bovine fetuin, asialofetuin, IgG, ribonuclease B, and alpha-1 acid glycoprotein (AGP) by PGC-LC-MS. Comprehensive structural isomeric separation of glycopeptides was observed by high-resolution MS and confirmed by MS/MS. The specific structures of the glycopeptide isomers were identified and confirmed through exoglycosidase digestions. Glycosylation analysis of human AGP revealed the potential use of PGC-LC-MS for extensive glycoprotein analysis for biomarker discovery. This newly developed separation technique was shown as a reproducible and useful analytical method to study site-specific isomeric glycosylation.
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Affiliation(s)
| | | | - Jingfu Zhao
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
| | - Jieqiang Zhong
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
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8
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Fuertes-Martín R, Correig X, Vallvé JC, Amigó N. Title: Human Serum/Plasma Glycoprotein Analysis by 1H-NMR, an Emerging Method of Inflammatory Assessment. J Clin Med 2020; 9:E354. [PMID: 32012794 PMCID: PMC7073769 DOI: 10.3390/jcm9020354] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/13/2020] [Accepted: 01/17/2020] [Indexed: 12/17/2022] Open
Abstract
Several studies suggest that variations in the concentration of plasma glycoproteins can influence cellular changes in a large number of diseases. In recent years, proton nuclear magnetic resonance (1H-NMR) has played a major role as an analytical tool for serum and plasma samples. In recent years, there is an increasing interest in the characterization of glycoproteins through 1H-NMR in order to search for reliable and robust biomarkers of disease. The objective of this review was to examine the existing studies in the literature related to the study of glycoproteins from an analytical and clinical point of view. There are currently several techniques to characterize circulating glycoproteins in serum or plasma, but in this review, we focus on 1H-NMR due to its great robustness and recent interest in its translation to the clinical setting. In fact, there is already a marker in H-NMR representing the acetyl groups of the glycoproteins, GlycA, which has been increasingly studied in clinical studies. A broad search of the literature was performed showing a general consensus that GlycA is a robust marker of systemic inflammation. The results also suggested that GlycA better captures systemic inflammation even more than C-reactive protein (CRP), a widely used classical inflammatory marker. The applications reviewed here demonstrated that GlycA was potentially a key biomarker in a wide range of diseases such as cancer, metabolic diseases, cardiovascular risk, and chronic inflammatory diseases among others. The profiling of glycoproteins through 1H-NMR launches an encouraging new paradigm for its future incorporation in clinical diagnosis.
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Affiliation(s)
- Rocío Fuertes-Martín
- Biosfer Teslab SL, 43201 Reus, Spain; (R.F.-M.); (N.A.)
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
| | - Xavier Correig
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
| | - Joan-Carles Vallvé
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
- Lipids and Arteriosclerosis Research Unit, Sant Joan de Reus University Hospital, 43201 Reus, Spain
| | - Núria Amigó
- Biosfer Teslab SL, 43201 Reus, Spain; (R.F.-M.); (N.A.)
- Metabolomic s platform, IISPV, CIBERDEM, Rovira i Virgili University, 43007 Tarragona, Spain
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9
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Zhao D, Jiang X, Xu Y, Yang H, Gao D, Li X, Gao L, Ma C, Liang X. Decreased Siglec-9 Expression on Natural Killer Cell Subset Associated With Persistent HBV Replication. Front Immunol 2018; 9:1124. [PMID: 29899741 PMCID: PMC5988867 DOI: 10.3389/fimmu.2018.01124] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 05/03/2018] [Indexed: 12/23/2022] Open
Abstract
Siglec-9 is an MHC-independent inhibitory receptor selectively expressed on CD56dim NK cells. Its role in infection diseases has not been investigated yet. Here, we studied the potential regulatory roles of NK Siglec-9 in the pathogenesis of chronic hepatitis B (CHB) infection. Flow cytometry evaluated the expression of Siglec-9 and other receptors on peripheral NK cells. Immunofluorescence staining was used to detect Siglec-9 ligands on liver biopsy tissues and cultured hepatocyte cell lines. Siglec-9 blocking assay was carried out and cytokine synthesis and CD107a degranulation was detected by flow cytometry. Compared to healthy donors, CHB patients had decreased Siglec-9+ NK cells, which reversely correlated with serum hepatitis B e antigen and HBV DNA titer. Siglec-9 expression on NK cells from patients achieving sustained virological response recovered to the level of normal donors. Neutralization of Siglec-9 restored cytokine synthesis and degranulation of NK cells from CHB patients. Immunofluorescence staining showed increased expression of Siglec-9 ligands in liver biopsy tissues from CHB patients and in hepatocyte cell lines infected with HBV or stimulated with inflammatory cytokines (IL-6 or TGF-β). These findings identify Siglec-9 as a negative regulator for NK cells contributing to HBV persistence and the intervention of Siglec-9 signaling might be of potentially translational significance.
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Affiliation(s)
- Di Zhao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China.,Department of Clinical Laboratory, Qilu Hospital of Shandong University, Jinan, China
| | - Xuemei Jiang
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China.,Department of Hepatic Diseases, Jinan Infectious Disease Hospital, Jinan, China
| | - Yong Xu
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China
| | - Huimin Yang
- Department of Nephrology, Qilu Hospital, Shandong University, Jinan, China
| | - Dongni Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China
| | - Xueen Li
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan, China
| | - Lifen Gao
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China
| | - Chunhong Ma
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China
| | - Xiaohong Liang
- Key Laboratory for Experimental Teratology of Ministry of Education, Key Laboratory of Infection and Immunity of Shandong Province and Department of Immunology, Shandong University School of Medicine, Jinan, China
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Frost DC, Li L. Recent advances in mass spectrometry-based glycoproteomics. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2018; 95:71-123. [PMID: 24985770 DOI: 10.1016/b978-0-12-800453-1.00003-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Protein glycosylation plays fundamental roles in many biological processes as one of the most common, and the most complex, posttranslational modification. Alterations in glycosylation profile are now known to be associated with many diseases. As a result, the discovery and detailed characterization of glycoprotein disease biomarkers is a primary interest of biomedical research. Advances in mass spectrometry (MS)-based glycoproteomics and glycomics are increasingly enabling qualitative and quantitative approaches for site-specific structural analysis of protein glycosylation. While the complexity presented by glycan heterogeneity and the wide dynamic range of clinically relevant samples like plasma, serum, cerebrospinal fluid, and tissue make comprehensive analyses of the glycoproteome a challenging task, the ongoing efforts into the development of glycoprotein enrichment, enzymatic digestion, and separation strategies combined with novel quantitative MS methodologies have greatly improved analytical sensitivity, specificity, and throughput. This review summarizes current MS-based glycoproteomics approaches and highlights recent advances in its application to cancer biomarker and neurodegenerative disease research.
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Affiliation(s)
- Dustin C Frost
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin, USA
| | - Lingjun Li
- School of Pharmacy, University of Wisconsin, Madison, Wisconsin, USA; Department of Chemistry, University of Wisconsin, Madison, Wisconsin, USA.
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Zhang S, Cao X, Gao Q, Liu Y. Protein glycosylation in viral hepatitis-related HCC: Characterization of heterogeneity, biological roles, and clinical implications. Cancer Lett 2017; 406:64-70. [DOI: 10.1016/j.canlet.2017.07.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 07/26/2017] [Accepted: 07/30/2017] [Indexed: 12/12/2022]
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12
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Huang Y, Zhou S, Zhu J, Lubman DM, Mechref Y. LC-MS/MS isomeric profiling of permethylated N-glycans derived from serum haptoglobin of hepatocellular carcinoma (HCC) and cirrhotic patients. Electrophoresis 2017; 38:2160-2167. [PMID: 28543513 PMCID: PMC5613657 DOI: 10.1002/elps.201700025] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/23/2017] [Accepted: 05/12/2017] [Indexed: 12/23/2022]
Abstract
Early stage detection and cancer treatment demand the identification of reliable biomarkers. Over the past decades, efforts have been devoted to assess the variation of glycosylation level as well as the glycan structures of proteins in blood or serum, associated with the development and/or progression of several cancers, including liver. Herein, an LC-MS/MS-based analysis was conducted to define the glycosylation patterns of haptoglobin glycoprotein derived from sera collected from cirrhotic and hepatocellular carcinoma (HCC) patients. The haptoglobin samples were extracted from serum using an antibody-immobilized column prior to the release of N-glycans. A comparison of non-isomeric and isomeric permethylated glycan forms was achieved using C18 and porous graphitic carbon (PGC) columns, respectively. In the case of C18-LC-MS/MS analysis, 25 glycan structures were identified of which 10 sialylated structures were found to be statistically significant between the two cohorts. Also, 8 out of 34 glycan structures identified by PGC-LC-MS/MS were found to be statistically significant, suggesting that isomeric distributions of a particular glycan composition were different in abundances between the two cohorts. The glycan isoform patterns distinguished early stage HCC from cirrhotic patients. Both retention times and tandem mass spectra were utilized to determine the specific isomeric glycan structures. All of the glycan isomers, which were statistically significant, were either branch fucosylated or composed of α-2,6 linked sialic acid moieties. The result of this study demonstrates the potential importance of isomeric separation for defining disease prompted aberrant glycan changes. The levels of several glycan isoforms effectively distinguished early stage HCC from cirrhosis.
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Affiliation(s)
- Yifan Huang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
| | - Shiyue Zhou
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
| | - Jianhui Zhu
- Department of Surgery, The University of Michigan, Ann Arbor, MI 48109
| | - David M. Lubman
- Department of Surgery, The University of Michigan, Ann Arbor, MI 48109
| | - Yehia Mechref
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX
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Vujanovic L, Stahl EC, Pardee AD, Geller DA, Tsung A, Watkins SC, Gibson GA, Storkus WJ, Butterfield LH. Tumor-Derived α-Fetoprotein Directly Drives Human Natural Killer-Cell Activation and Subsequent Cell Death. Cancer Immunol Res 2017; 5:493-502. [PMID: 28468916 DOI: 10.1158/2326-6066.cir-16-0216] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 03/22/2017] [Accepted: 04/28/2017] [Indexed: 11/16/2022]
Abstract
Hepatocellular carcinoma (HCC) patients with reduced natural killer (NK)-cell numbers and function have been shown to have a poor disease outcome. Mechanisms underlying NK-cell deficiency and dysfunction in HCC patients remain largely unresolved. α-Fetoprotein (AFP) is an oncofetal antigen produced by HCC. Previous studies demonstrated that tumor-derived AFP (tAFP) can indirectly impair NK-cell activity by suppressing dendritic cell function. However, a direct tAFP effect on NK cells remains unexplored. The purpose of this study was to examine the ability of cord blood-derived AFP (nAFP) and that of tAFP to directly modulate human NK-cell activity and longevity in vitro Short-term exposure to tAFP and, especially, nAFP proteins induced a unique proinflammatory, IL2-hyperresponsive phenotype in NK cells as measured by IL1β, IL6, and TNF secretion, CD69 upregulation, and enhanced tumor cell killing. In contrast, extended coculture with tAFP, but not nAFP, negatively affected long-term NK-cell viability. NK-cell activation was directly mediated by the AFP protein itself, whereas their viability was affected by hydrophilic components within the low molecular mass cargo that copurified with tAFP. Identification of the distinct impact of circulating tAFP on NK-cell function and viability may be crucial to developing a strategy to ameliorate HCC patient NK-cell functional deficits. Cancer Immunol Res; 5(6); 493-502. ©2017 AACR.
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Affiliation(s)
- Lazar Vujanovic
- University of Pittsburgh Cancer Institute, University of Pittsburgh, Pennsylvania.,Department of Medicine, University of Pittsburgh, Pennsylvania
| | - Elizabeth C Stahl
- University of Pittsburgh Cancer Institute, University of Pittsburgh, Pennsylvania
| | - Angela D Pardee
- University of Pittsburgh Cancer Institute, University of Pittsburgh, Pennsylvania.,Department of Medicine, University of Pittsburgh, Pennsylvania
| | - David A Geller
- University of Pittsburgh School of Medicine, Department of Surgery, University of Pittsburgh, Pennsylvania
| | - Allan Tsung
- University of Pittsburgh School of Medicine, Department of Surgery, University of Pittsburgh, Pennsylvania
| | - Simon C Watkins
- Department of Cell Biology and Physiology, University of Pittsburgh, Pennsylvania
| | - Gregory A Gibson
- Department of Cell Biology and Physiology, University of Pittsburgh, Pennsylvania
| | - Walter J Storkus
- University of Pittsburgh Cancer Institute, University of Pittsburgh, Pennsylvania.,Department of Dermatology, University of Pittsburgh, Pennsylvania.,Department of Immunology, University of Pittsburgh, Pennsylvania
| | - Lisa H Butterfield
- University of Pittsburgh Cancer Institute, University of Pittsburgh, Pennsylvania. .,Department of Medicine, University of Pittsburgh, Pennsylvania.,University of Pittsburgh School of Medicine, Department of Surgery, University of Pittsburgh, Pennsylvania.,Department of Immunology, University of Pittsburgh, Pennsylvania
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A glucose/mannose binding lectin from litchi ( Litchi chinensis) seeds: Biochemical and biophysical characterizations. Biochem Biophys Rep 2016; 6:242-252. [PMID: 29214228 PMCID: PMC5689159 DOI: 10.1016/j.bbrep.2016.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 04/27/2016] [Accepted: 05/02/2016] [Indexed: 02/01/2023] Open
Abstract
Background Lectins are highly important biomolecules to study several biological processes. A novel α-D-glucose/mannose specific lectin was isolated from the seeds of litchi fruits (Litchi chinensis) and its various biophysical and biochemical properties were studied. Methods Purification was done by successive Sephadex G 100 and Con A-Sepharose 4B affinity chromatography. SDS-PAGE, Surface Plasmon Resonance (SPR), steady state absorbance, fluorescence, time-correlated single-photon counting, circular dichroism and antibiofilm activity by measuring total protein estimation and azocasein degradation assay have been performed. Results The purified lectin is a homodimer of molecular mass ~ 54 kDa. The amount of lectin required for hemagglutination of normal human O erythrocytes was 6.72 µg/ml. Among the saccharides tested, Man-α-(1,6)-Man was found to be the most potent inhibitor (0.01 mM) determined by hemagglutination inhibition assay. Steady state and time resolved fluorescence measurements revealed that litchi lectin formed ground state complex with maltose (Ka=4.9 (±0.2)×104 M-1), which indicated static quenching (Stern-Volmer (SV) constant Ksv=4.6 (±0.2)×104 M-1). CD measurements demonstrated that litchi lectin showed no overall conformational change during the binding process with maltose. The lectin showed antibiofilm activity against Pseudomonus aeruginosa. Conclusions A novel homodimeric lectin has been purified from the seeds of litchi fruits (Litchi chinensis) having specificity for α-d-glucose/mannose. The thermodynamics and conformational aspects of its interaction with maltose have been studied in detail. The antibiofilm activity of this lectin towards Pseudomonus aeruginosa has been explored. General significance The newly identified litchi lectin is highly specific for α-d-glucose/mannose with an important antibiofilm activity towards Pseudomonus aeruginosa.
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Mondal G, Saroha A, Bose PP, Chatterjee BP. Altered glycosylation, expression of serum haptoglobin and alpha-1-antitrypsin in chronic hepatitis C, hepatitis C induced liver cirrhosis and hepatocellular carcinoma patients. Glycoconj J 2016; 33:209-18. [PMID: 27034286 DOI: 10.1007/s10719-016-9658-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 02/11/2016] [Accepted: 02/15/2016] [Indexed: 01/01/2023]
Abstract
Liver cirrhosis with hepatitis C viral infection (HCV-LC) causes high risk to develop hepatocellular carcinoma (HCC). Besides diagnosis of liver cirrhosis by biochemical test, imaging techniques, assessment of structural liver damage by biopsy shows several disadvantages. Our aim was to monitor the changes in the expression level of serum proteins and their glycosylation pattern among chronic hepatitis C (HCV-CH), HCV-LC and HCC patients with respect to controls. 2D gel electrophoresis of HCV-CH, HCV-LC and HCC patients' sera showed several protein spots, which were identified by LC-MS. The change in the expression of two prominent protein spots, haptoglobin (Hp) and alpha 1-antitrypsin (AAT) was evaluated by western blot and ELISA. The changes in glycosylation pattern of these serum proteins were assayed using different lectins. Increased level of Hp and AAT was observed in HCV-LC and HCC patients' group whereas those were found to be present less in HCV-CH patient groups with respect to control as determined by ELISA using monoclonal antibodies. Decreased level of sialylation in both Hp and AAT was observed in HCV-LC and HCV-CH patients' group whereas increased level of sialylation was observed in HCC patient groups by ELISA using Sambucus nigra agglutinin. On the other hand increased level of fucosylation in two serum glycoproteins was observed in HCV-LC and HCC patients' group using Lens culinarris agglutinin. High glycan branching was found in HCV-LC and HCC patient groups in Hp but not in HCV-CH as determined by Datura stramonium agglutinin. However, there was no such change observed in glycan branching in AAT of HCV-CH and HCV-LC patients' groups, to the contrary high glycan branching was observed in HCC patients' group. Increased level of exposed galactose in both serum proteins was observed in both HCC patients' group as determined by Ricinus communis agglutinin. The present glycoproteomics study could predict the progression of HCV-CH, HCV-LC and HCC without the need of liver biopsy.
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Affiliation(s)
- Gautam Mondal
- Department of Natural Sciences, West Bengal University of Technology, Salt Lake, Kolkata, 700064, India
| | - Ashish Saroha
- Genomics and Molecular Medicine Division, CSIR- Institute of Genomics and Integrative Biology, Delhi, India
| | - Partha Pratim Bose
- Department of Molecular Medicine, Bose Institute, P 1/12, CIT Road, Kolkata, 700054, India
| | - B P Chatterjee
- Department of Natural Sciences, West Bengal University of Technology, Salt Lake, Kolkata, 700064, India.
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Abstract
Chronic liver diseases are a serious health problem worldwide. The biosynthesis of proteins takes place in the liver, and protein glycosylation is the most common form of post-translational modification of proteins, with as many as 70% of all human proteins estimated to contain one or more glycan chains. Protein glycosylation is the enzymatic addition of sugars or oligosaccharides to proteins, which increases the diversity of the proteome to a level unmatched by any other post-translational modifications because of the various aspects of modification, including glycosidic bond, glycan composition, glycan structure, and glycan length. Changes in the glycan structures of proteins are an indication for liver damage, which plays an important role in the pathogenesis and progression of various liver diseases. The aim of this paper is to give an overview of the altered protein glycosylation in different etiologies of hepatitis, liver fibrosis/cirrhosis, hepatocellular carcinoma, alcoholic and fatty liver diseases based on the analysis of serum and saliva using the glycomics technology.
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Abstract
Liver cancer is the fifth most common cancer, but the second leading cause of cancer death, in the world, with more than 700,000 fatalities annually. The major etiology of liver cancer is infection with an hepatotropic virus such as hepatitis B virus or hepatitis C virus infection. While chronic viral infection remains the main cause of liver disease and risk of hepatocellular carcinoma (HCC), rates of nonviral-associated HCC are occurring at an alarmingly increasing rate. Like many cancers, survival rates are closely associated with time of detection. If HCC is caught early, survival rates can be as high as 50%. Regrettably, most cases of HCC are caught late where survival rates can be as low as 2-7%. Thus, there has been great interest in discovering serum biomarkers that could be used to identify those with HCC. To this end, many groups have examined the N-linked glycans to identify changes that occur with HCC. As the liver secretes the vast majority of proteins into the serum, this has often been a starting point for study. In serum, alterations in core fucosylation, outer-arm fucosylation, increased sialylation, and glycan branching have been observed in patients with HCC. Similar findings have been found directly in HCC tissue suggesting that these glycan changes may play a role in tumor formation and development.
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Affiliation(s)
- Anand Mehta
- Department of Microbiology and Immunology, Drexel University College of Medicine, Doylestown, Pennsylvania, USA
| | - Harmin Herrera
- Department of Microbiology and Immunology, Drexel University College of Medicine, Doylestown, Pennsylvania, USA
| | - Timothy Block
- Department of Microbiology and Immunology, Drexel University College of Medicine, Doylestown, Pennsylvania, USA
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Structural Heterogeneity of Glycoform of Alpha-1 Acid Glycoprotein in Alcoholic Cirrhosis Patients. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 842:389-401. [DOI: 10.1007/978-3-319-11280-0_24] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Zhao L, Liu M, Gao Y, Huang Y, Lu G, Gao Y, Guo X, She B. Glycosylation of sera thyroglobulin antibody in patients with thyroid diseases. Eur J Endocrinol 2013; 168:585-92. [PMID: 23360821 DOI: 10.1530/eje-12-0964] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVE Thyroglobulin antibody (TgAb) is an important autoantibody in thyroid diseases, which is a glycoprotein, predominantly of IgG class. Glycosylation of the IgG-Fc contributes to many effector functions exhibited by antibodies. The aim of our study was to investigate the glycosylation of sera TgAb in patients with different thyroid diseases. DESIGN AND METHODS Sera from 146 patients were collected and divided into four groups: Hashimoto's thyroiditis (HT, n=90), Graves' disease (GD, n=20), papillary thyroid carcinoma (PTC, n=17), and PTC with histological lymphocytic thyroiditis (PTC-T, n=19). HT patients were further divided into euthyroidism and subclinical and overt hypothyroidism groups. Lectin-ELISAs were performed to detect the relative amount of core fucose, terminal galactose, and sialic acid on each TgAb respectively. RESULTS Among HT, GD, and PTC groups, HT patients had significantly lower core fucose content on TgAb than the other two groups; an increasing trend of sialylation was found in PTC sera (P=0.076) compared with HT groups. PTC-T patients had significantly higher sialylated TgAb than HT and GD patients, and no significant difference was found between PTC and PTC-T. There was no significant difference in the three carbohydrate residue contents on sera TgAb among HT subgroups. In all the patients, negative correlation was found between sialic acid content and TgAb IgG levels (r=-0.736, P<0.001). CONCLUSIONS Our study showed that glycosylation of sera TgAb varied in different thyroid diseases and it might be involved in pathogenesis of thyroid disorders.
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Affiliation(s)
- Lanlan Zhao
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, People's Republic of China
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Glycoproteomics-based identification of cancer biomarkers. INTERNATIONAL JOURNAL OF PROTEOMICS 2011; 2011:601937. [PMID: 22084691 PMCID: PMC3195811 DOI: 10.1155/2011/601937] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 07/16/2011] [Indexed: 01/06/2023]
Abstract
Protein glycosylation is one of the most common posttranslational modifications in mammalian cells. It is involved in many biological pathways and molecular functions and is well suited for proteomics-based disease investigations. Aberrant protein glycosylation may be associated with disease processes. Specific glycoforms of glycoproteins may serve as potential biomarkers for the early detection of disease or as biomarkers for the evaluation of therapeutic efficacy for treatment of cancer, diabetes, and other diseases. Recent technological developments, including lectin affinity chromatography and mass spectrometry, have provided researchers the ability to obtain detailed information concerning protein glycosylation. These in-depth investigations, including profiling and quantifying glycoprotein expression, as well as comprehensive glycan structural analyses may provide important information leading to the development of disease-related biomarkers. This paper describes methodologies for the detection of cancer-related glycoprotein and glycan structural alterations and briefly summarizes several current cancer-related findings.
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