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Zhang Q, Li N, Hou Y, Fan M, Zhang Y, Dang F. Co-immobilization of crosslinked enzyme aggregates on lysozyme functionalized magnetic nanoparticles for enhancing stability and activity. Int J Biol Macromol 2024; 273:133180. [PMID: 38880453 DOI: 10.1016/j.ijbiomac.2024.133180] [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: 04/07/2024] [Revised: 05/31/2024] [Accepted: 06/13/2024] [Indexed: 06/18/2024]
Abstract
Surface chemistry of carriers plays a key role in enzyme loading capacity, structure rigidity, and thus catalyze activity of immobilized enzymes. In this work, the two model enzymes of horseradish peroxidase (HRP) and glucose oxidase (GOx) are co-immobilized on the lysozyme functionalized magnetic core-shell nanocomposites (LYZ@MCSNCs) to enhance their stability and activity. Briefly, the HRP and GOx aggregates are firstly formed under the crosslinker of trimesic acid, in which the loading amount and the rigidity of the enzyme can be further increased. Additionally, LYZ easily forms a robust anti-biofouling nanofilm on the surface of SiO2@Fe3O4 magnetic nanoparticles with abundant functional groups, which facilitate chemical crosslinking of HRP and GOx aggregates with minimized inactivation. The immobilized enzyme of HRP-GOx@LYZ@MCSNCs exhibited excellent recovery activity (95.6 %) higher than that of the free enzyme (HRP&GOx). Specifically, 85 % of relative activity was retained after seven cycles, while 73.5 % of initial activity was also remained after storage for 33 days at 4 °C. The thermal stability and pH adaptability of HRP-GOx@LYZ@MCSNCs were better than those of free enzyme of HRP&GOx. This study provides a mild and ecofriendly strategy for multienzyme co-immobilization based on LYZ functionalized magnetic nanoparticles using HRP and GOx as model enzymes.
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Affiliation(s)
- Qiqi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Nan Li
- Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE), Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University (NPU), Xi'an 710072, China.
| | - Yawen Hou
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Miao Fan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Yuxiu Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Fuquan Dang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China.
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Shu J, Xiong W, Zhang R, Ma S, Zhou K, Wang X, Yan F, Huang D, Li J, Wu Y, He J. Glycan-selective in-situ growth of thermoresponsive polymers for thermoprecipitation and enrichment of N-glycoprotein/glycopeptides. Talanta 2023; 253:123956. [PMID: 36167012 DOI: 10.1016/j.talanta.2022.123956] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 09/13/2022] [Accepted: 09/19/2022] [Indexed: 12/13/2022]
Abstract
In view of the biological significance and micro-heterogeneity of protein glycosylation for human health, specific enrichment of N-glycosylated proteins/peptides from complex biological samples is a prerequisite for the discovery of disease biomarkers and clinical diagnosis. In this work, we propose a "grafting-from" N-glycoprotein enriching method based on the in-situ growth of thermoresponsive polymer brushes from the N-glycosylated site of proteins. The initiator was first attached to the pre-oxidized glycan moieties by hydrazide chemistry, from which the thermoresponsive polymers can be grown to form giant protein-polymer conjugates (PPC). The thermosensitive PPC can be precipitated and separated by raising the temperature to above its lower critical solubility temperature (LCST). Mass spectrometry verified 210 N-glycopeptides corresponding to 136 N-glycoproteins in the rabbit serum. These results demonstrate the capability of the tandem thermoprecipitation strategy to enrich and separate N-glycoprotein/glycopeptide. Due to its simplicity and efficiency specifically, this method holds the potential for identifying biomarkers from biological samples in N-glycoproteome analysis.
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Affiliation(s)
- Jingjing Shu
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Wenli Xiong
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Ran Zhang
- Central Laboratory of Health Quarantine, International Travel Health Care Center, Shenzhen Customs District. 1011 Fuqiang Road, Shenzhen, 518045, China
| | - Shanyun Ma
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Kaiqiang Zhou
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Xuwei Wang
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Fen Yan
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Da Huang
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Jianhua Li
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China
| | - Yuanzi Wu
- Research Institute of Photocatalysis, College of Biological Science and Engineering, Fuzhou University, 2 Xueyuan Road, Fuzhou, 350108, China.
| | - Jian'an He
- Central Laboratory of Health Quarantine, International Travel Health Care Center, Shenzhen Customs District. 1011 Fuqiang Road, Shenzhen, 518045, China.
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2019-2020. MASS SPECTROMETRY REVIEWS 2022:e21806. [PMID: 36468275 DOI: 10.1002/mas.21806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
This review is the tenth update of the original article published in 1999 on the application of matrix-assisted laser desorption/ionization (MALDI) mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2020. Also included are papers that describe methods appropriate to analysis by MALDI, such as sample preparation techniques, even though the ionization method is not MALDI. The review is basically divided into three sections: (1) general aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, fragmentation, quantification and the use of arrays. (2) Applications to various structural types such as oligo- and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals, and (3) other areas such as medicine, industrial processes and glycan synthesis where MALDI is extensively used. Much of the material relating to applications is presented in tabular form. The reported work shows increasing use of incorporation of new techniques such as ion mobility and the enormous impact that MALDI imaging is having. MALDI, although invented nearly 40 years ago is still an ideal technique for carbohydrate analysis and advancements in the technique and range of applications show little sign of diminishing.
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Affiliation(s)
- David J Harvey
- Nuffield Department of Medicine, Target Discovery Institute, University of Oxford, Oxford, UK
- Department of Chemistry, University of Oxford, Oxford, Oxfordshire, United Kingdom
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Liu Z, Xu M, Zhang W, Miao X, Wang PG, Li S, Yang S. Recent development in hydrophilic interaction liquid chromatography stationary materials for glycopeptide analysis. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:4437-4448. [PMID: 36300821 DOI: 10.1039/d2ay01369j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Protein glycosylation is one of the most important post-translational modifications, and aberrant glycosylation is associated with the occurrence and development of diseases. Deciphering abnormal glycosylation changes can identify disease-specific signatures to facilitate the discovery of potential disease biomarkers. However, glycosylation analysis is challenging due to the diversity of glycans, heterogeneity of glycosites, and poor electrospray ionization of mass spectrometry. To overcome these obstacles, glycosylation is often elucidated using enriched glycopeptides by removing highly abundant non-glycopeptides. Hydrophilic interaction liquid chromatography (HILIC) is widely used for glycopeptide enrichment due to its excellent selectivity and specificity to hydrophilic glycans and compatibility with mass spectrometry. However, the development of HILIC has lagged far behind hydrophobic interaction chromatography, so efforts to further improve the performance of HILIC are beneficial for glycosylation analysis. This review discusses recent developments in HILIC materials and their advanced applications. Based on the physiochemical properties of glycopeptides, the use of amino acids or peptides as stationary phases showed improved enrichment and separation of glycopeptides. We can envision that the use of glycopeptides as stationary phases would definitely further improve the selectivity and specificity of HILIC for glycosylation analysis.
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Affiliation(s)
- Zhaoliang Liu
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Jiangsu, 215123, China.
| | - Mingming Xu
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Jiangsu, 215123, China.
| | - Wenqi Zhang
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Jiangsu, 215123, China.
- Nanjing Apollomics Biotech, Inc., Nanjing, Jiangsu 210033, China.
| | - Xinyu Miao
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Jiangsu, 215123, China.
- Nanjing Apollomics Biotech, Inc., Nanjing, Jiangsu 210033, China.
| | - Perry G Wang
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD 20740, USA
| | - Shuwei Li
- Nanjing Apollomics Biotech, Inc., Nanjing, Jiangsu 210033, China.
| | - Shuang Yang
- Center for Clinical Mass Spectrometry, College of Pharmaceutical Sciences, Soochow University, Jiangsu, 215123, China.
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Ali N, Hassan Riead MM, Bilal M, Yang Y, Khan A, Ali F, Karim S, Zhou C, Wenjie Y, Sher F, Iqbal HMN. Adsorptive remediation of environmental pollutants using magnetic hybrid materials as platform adsorbents. CHEMOSPHERE 2021; 284:131279. [PMID: 34175517 DOI: 10.1016/j.chemosphere.2021.131279] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 02/07/2023]
Abstract
Effective separation and remediation of environmentally hazardous pollutants are burning areas of research because of a constant increase in environmental pollution problems. An extensive number of emerging contaminants in the environmental matrices result in serious health consequences in animals, humans, and plants, even at trace levels. Therefore, it is of paramount significance to quantify these undesirable pollutants, even at a very low concentration, from the natural environment. Magnetic solid-phase extraction (MSPE) has recently achieved huge attention because of its strong magnetic domain and easy separation through an external magnetic field compared with simple solid-phase extraction. Therefore, MSPE appeared the most promising technique for removing and pre-concentration of emerging pollutants at trace level. Compared to the normal solid-phase extraction, MSPE as magnetic hybrid adsorbents offers the unique advantages of distinct nanomaterials and magnetic hybrid materials. It can exhibit efficient dispersion and rapid recycling when applying to a very complex matrix. This review highlights the possible environmental applications of magnetic hybrid nanoscale materials as effective MSPE sorbents to remediate a diverse range of environmentally toxic pollutants. We believe this study tends to evoke a variety of research thrust that may lead to novel remediation approaches in the forthcoming years.
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Affiliation(s)
- Nisar Ali
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China.
| | - Md Mahamudul Hassan Riead
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Muhammad Bilal
- School of Life Science and Food Engineering, Huaiyin Institute of Technology, Huaian, 223003, China.
| | - Yong Yang
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Adnan Khan
- Institute of Chemical Sciences, University of Peshawar, Khyber Pakhtunkhwa, 25120, Pakistan
| | - Farman Ali
- Department of Chemistry, Hazara University, KPK, Mansehra, 21300, Pakistan
| | - Shafiul Karim
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Cao Zhou
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Ye Wenjie
- Key Laboratory of Regional Resource Exploitation and Medicinal Research, Faculty of Chemical Engineering, Huaiyin Institute of Technology, Huaian, Jiangsu Province, PR China
| | - Farooq Sher
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Science, Monterrey, 64849, Mexico.
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Yan Y, Han R, Hou Y, Zhang H, Yu J, Gao W, Xu L, Tang K. Bowl-like mesoporous polydopamine with size exclusion for highly selective recognition of endogenous glycopeptides. Talanta 2021; 233:122468. [PMID: 34215103 DOI: 10.1016/j.talanta.2021.122468] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 04/16/2021] [Accepted: 04/23/2021] [Indexed: 01/01/2023]
Abstract
It has been confirmed that endogenous glycopeptide plays an important role in a variety of pathological and physiological processes. However, direct analysis of endogenous glycopeptide is still a great challenge owing to the low abundance of endogenous glycopeptides and the presence of a large number of interfering substances such as large-sized proteins and heteropeptides in complex biological sample. Herein, we reported a novel bowl-like mesoporous polydopamine nanoparticle modified by carrageenan (denoted as MPDA@PEI@CA) with strong hydrophilicity and size-exclusion effect for high specificity enrichment of endogenous glycopeptides. Thanks to the suitable pore channel structure as well as strong hydrophilic surface, the as-prepared MPDA@PEI@CA nanoparticles exhibited prominent performance in enrichment of N-linked glycopeptide with ultrahigh selectivity (1:5000 M ratio of horseradish peroxidase (HRP) digests/bovine serum albumin (BSA) digests), low detection limit (5 fmol μL-1), outstanding size-exclusion ability (1:1000 mass of HRP/BSA), and unique reusability (five times). 125 N-glycosylation sites of 134 glycopeptides from 65 glycoproteins were identified from 2 μL sample of human serum treated with the MPDA@PEI@CA nanoparticles, which manifested the ability to enrich endogenous N-linked glycopeptides from complex biological samples. These results indicated that the bowl-like MPDA@PEI@CA nanoparticles with novel structure prepared in this work had great potential for glycopeptidome analysis.
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Affiliation(s)
- Yuyan Yan
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China
| | - Renlu Han
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China.
| | - Yafei Hou
- Department of Microelectronic Science and Engineering, Ningbo University, Ningbo, 315211, PR China
| | - Huijun Zhang
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China
| | - Jiancheng Yu
- Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo, 315211, PR China
| | - Wenqing Gao
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China
| | - Long Xu
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China
| | - Keqi Tang
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, PR China; Institute of Mass Spectrometry, School of Materials Science & Chemical Engineering, Ningbo University, Ningbo, 315211, PR China.
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Qi H, Jiang L, Jia Q. Application of magnetic solid phase extraction in separation and enrichment of glycoproteins and glycopeptides. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.01.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Li N, Zhang L, Shi H, Li J, Zhang J, Zhang Z, Dang F. C 18-functionalized magnetic nanocomposites fabricated by one-step aqueous coating of tailored oligopeptides for enrichment of low-abundance peptides. J Chromatogr A 2020; 1636:461730. [PMID: 33326925 DOI: 10.1016/j.chroma.2020.461730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 11/09/2020] [Accepted: 11/17/2020] [Indexed: 11/28/2022]
Abstract
Screening and monitoring endogenous peptides from complicated biosamples is still a major challenge in mass spectrometry-based proteomics research, mainly due to their low concentration and the interference of high-abundance proteins and other contaminants in biological samples. Herein, a facile and novel approach was described for rapid fabrication of C18-functionalized magnetic nanocomposites (C18-MNCs) based on one-step aqueous coating of C18-Val-Lys-Val-Lys-Val-Lys (C18-VK-VI) for the highly selective enrichment of low-abundance endogenous peptides from biological samples. C18-VK-VI can readily self-assemble into complete monolayers mainly composed of β-sheets with C18 hydrophobic chains erecting on the surface of GO@Fe3O4 MNCs under the physiological conditions. The resulting C18VK-VI-GO@Fe3O4 MNCs exhibited good performance for peptides enrichment from digests of standard protein (myoglobin, MYO) and human serum, such as high sensitivity (0.05 fmol μL-1) and selectivity (mass ratio of MYO digests and MYO = 1:500), rapid separation, and good reproducibility. Such a simple mild and rapid one-step aqueous coating method on the basis of oligopeptides self-assembly showed great potential in surface functionalization of various nanoadsorbents for proteome/peptidome researches.
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Affiliation(s)
- Nan Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Li Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Hailan Shi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Jianru Li
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Jing Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Zhiqi Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China
| | - Fuquan Dang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, 620 West Chang'an Street, Xi'an 710119, China.
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Development of a Novel Sensor System Based on Magnetic Microspheres to Detect Cardiac Troponin T. INT J POLYM SCI 2020. [DOI: 10.1155/2020/8855550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Acute myocardial infarction (AMI) causes irreversible injury to cardiomyocytes in a short time and may result in various complications, severely threatening patient safety. Therefore, it is necessary to predict the possibility of AMI in the prophase. Prognostic detection of biomarkers that specifically reflect myocardial damage in a patient’s blood has become an essential mediating measure to prevent the serious occurrence of AMI. The present study is aimed at exploring a novel sensing system with high specificity and precision based on magnetic microspheres developed to detect cardiac troponin T (cTnT), which is the most specific diagnostic marker for AMI in cardiovascular diseases. Naive human cTnT protein in serum samples and antigens on functional magnetic microspheres will competitively bind with limited specific antibodies. After rapid removal of heterogeneous elements in the sera using a magnetic separator, fluorescein isothiocyanate-labeled immunoglobulin G is added to react with specific antibodies on the magnetic microspheres. Then, a flow cytometer is used to collect signals of different fluorescence intensities. The results show that the method is characterized by economy, high accuracy, and novelty. It can be used for the detection of cTnT in blood at 1.7–106.1 ng/mL, with a detection limit of 0.5 ng/mL. Thus, the proposed sensor improves the accuracy and efficiency of diagnosis before clinical deterioration of AMI.
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Li J, Huan W, Xu K, Wang B, Zhang J, Zhu B, Wu M, Wang J. Gold nanoparticle-glutathione-functionalized porous graphene oxide-based hydrophilic beads for the selective enrichment of N-linked glycopeptides. Mikrochim Acta 2020; 187:518. [PMID: 32851535 DOI: 10.1007/s00604-020-04519-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 08/18/2020] [Indexed: 12/17/2022]
Abstract
A three-dimensional structured porous graphene oxide-polyethylenimine bead (pGP) is synthesized for immobilizing gold nanoparticles and modifying glutathione molecules (denoted as pGP/AuG). The pGP/AuG has open pore structure, honeycomb-like channels, and excellent hydrophilicity. By taking advantages of the porous structure, abundant binding sites, and multivalent interactions between glycopeptides and both glutathione molecules and free amino groups, the pGP/AuG is adopted to the selective enrichment of N-linked glycopeptides with low limit of detection (2 fmol), high enrichment selectivity (1:500), binding capacity (333.3 mg/g), recovery yield (91.3 ± 2.1%), and repeatability (< 6.0% RSD) using matrix-assisted laser desorption/ionization time of flight mass spectrometry detection method. Furthermore, the practical applicability of pGP/AuG is evaluated, in which 209 N-glycosylated peptides corresponding to 128 N-glycosylated proteins are identified from 1 μL human serum in three independent analysis procedures, suggesting the great potential for application in glycoproteome fields.Graphical abstract Schematic presentation of preparation for porous graphene oxide-based hydrophilic beads (pGP/AuG) with honeycomb-like microstructure. The pGP/AuG was successfully used for enriching and identifying glycopeptides from actual biological sample.
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Affiliation(s)
- Jie Li
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A& F University, Lin'an, Hangzhou, 311300, China.
| | - Weiwei Huan
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A& F University, Lin'an, Hangzhou, 311300, China
| | - Kaiwei Xu
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, 315020, China
| | - Buchuan Wang
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A& F University, Lin'an, Hangzhou, 311300, China
| | - Jingshu Zhang
- Safety Assessment and Research Center for Drug, Pesticide and Veterinary Drug of Jiangsu Province, Nanjing Medical University, Nanjing, 211166, China
| | - Binbin Zhu
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, 315020, China
| | - Minjie Wu
- Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A& F University, Lin'an, Hangzhou, 311300, China
| | - Jianhua Wang
- Department of Radiology, The Affiliated Hospital of Medical School of Ningbo University, Ningbo, 315020, China.
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Specific enrichment of phosphopeptides by using magnetic nanocomposites of type Fe3O4@graphene oxide and Fe3O4@C coated with self-assembled oligopeptides. Mikrochim Acta 2020; 187:144. [DOI: 10.1007/s00604-019-4096-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 12/26/2019] [Indexed: 12/13/2022]
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