1
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van Schaick G, Pot S, Schouten O, den Hartog J, Akeroyd M, van der Hoeven R, Bijleveld W, Abello N, Wuhrer M, Olsthoorn M, Dominguez-Vega E. Evaluating the effect of glycation on lipase activity using boronate affinity chromatography and mass spectrometry. Food Chem 2023; 421:136147. [PMID: 37087987 DOI: 10.1016/j.foodchem.2023.136147] [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: 10/12/2022] [Revised: 03/07/2023] [Accepted: 04/10/2023] [Indexed: 05/03/2023]
Abstract
Protein glycation may occur naturally when reducing sugars and proteins coexist, which is often the case for industrial enzymes. The impact of post-translational modifications on enzyme performance (e.g., stability or function) is often not predictable, highlighting the importance of having appropriate analytical methodologies to monitor the influence of glycation on performance. Here, a boronate affinity chromatography method was developed to enrich glycated species followed by mass spectrometry for structural characterization and activity assays for functional assessment. This approach was applied to a (temperature-stressed) lipase used for food applications revealing that storage at -20 °C and 4 °C resulted in minor glycation (below 9%), whereas storage at 25 °C led to a higher glycation level with up to four sugars per lipase molecule. Remarkably, activity measurements revealed that glycation did not reduce lipase activity or stability. Altogether, this novel strategy is a helpful extension to the current analytical toolbox supporting development of enzyme products.
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Affiliation(s)
- Guusje van Schaick
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands.
| | - Sanne Pot
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
| | - Olaf Schouten
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Joost den Hartog
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Michiel Akeroyd
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Rob van der Hoeven
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Wim Bijleveld
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Nicolas Abello
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Manfred Wuhrer
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
| | - Maurien Olsthoorn
- DSM Science & Innovation, Biodata & Translation, Center for Analytical Innovation, Delft, the Netherlands
| | - Elena Dominguez-Vega
- Leiden University Medical Center, Center for Proteomics and Metabolomics, Leiden, the Netherlands
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2
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Guo Q, Zhang X. Synthesized of glucose-responsive nanogels labeled with fluorescence molecule based on phenylboronic acid by RAFT polymerization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:815-831. [PMID: 31044656 DOI: 10.1080/09205063.2019.1603065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We reported on the fabrication of sugar-responsive nanogels covalently incorporated with 3-acrylamidophenylboronic acid (AAPBA) as glucose-recognizing moiety, 2-(acrylamido)glucopyranose (AGA) as biocompatible moiety, and boron dipyrromethene (BODIPYMA) as fluorescence donor molecule. The p(AAPBA-AGA-BODIPYMA) nanogels were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization in the mixture solvents of H2O/ethanol. Nanogels could respond to glucose and size of nanogels increased after treating with 3 mg/mL glucose medium. The fluorescent intensity of nanogels varied dependent on different glucose concentrations. Besides, insulin, a model drug, can be encapsulated into nanogels with the loading amount up to 8.2%. The drug release was dependent on the content of AAPBA moieties in nanogels and glucose concentrations in release medium. The investigation on the cytotoxicity of nanogels revealed that nanogels had good compatibility. Such glucose-responsive nanogels have potential in detection and treatment of diabetes.
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Affiliation(s)
- Qianqian Guo
- a Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry , Nankai University , Tianjin , China
| | - Xinge Zhang
- a Key Laboratory of Functional Polymer Materials of Ministry of Education, Institute of Polymer Chemistry , Nankai University , Tianjin , China
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3
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Bergdahl GE, Hedström M, Mattiasson B. Capacitive Saccharide Sensor Based on Immobilized Phenylboronic Acid with Diol Specificity. Appl Biochem Biotechnol 2019; 188:124-137. [PMID: 30370445 PMCID: PMC6509085 DOI: 10.1007/s12010-018-2911-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 10/19/2018] [Indexed: 01/12/2023]
Abstract
A capacitive sensor for saccharide detection is described in this study. The detection is based on selective interaction between diols and aminophenylboronic acid (APBA) immobilized on a gold electrode. Glucose, fructose, and dextran (MW: 40 kDa) were tested with the system over wide concentration ranges (1.0 x 10-8 M - 1.0 x 10-3 M for glucose, 1.0 x 10-8 M - 1.0 x 10-2 M for fructose and 1.0 x 10-10 M - 1.0 x 10-5 M for dextran). The limits of detection (LODs) were 0.8 nM for glucose, 0.6 nM for fructose, and 13 pM for dextran. These data were comparable to the others reported previously. In order to demonstrate glycoprotein detection with the same sensor, human immunoglobulin G (IgG) as well as horseradish peroxidase were used as model analytes. The sensor responded to IgG in the concentration range of 1.0 x 10-13 M - 1.0 x 10-7 M with a LOD value of 16 fM. The performance of the assay of peroxidase was compared to a spectrophotometric assay by determining the enzymatic activity of a captured analyte. The results showed that the method might be useful for label-free, fast, and sensitive detection of saccharides as well as glycoproteins over a wide concentration range.
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Affiliation(s)
- Gizem Ertürk Bergdahl
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
- Department of Clinical Sciences, Lund University, Tornavägen 10, 22184 Lund, Sweden
| | - Martin Hedström
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
| | - Bo Mattiasson
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden
- Department of Biotechnology, Kemicentum, Lund University, Sölvegatan 39A, 22100 Lund, Sweden
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4
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Shen MY, Chen JF, Luo CH, Lee S, Li CH, Yang YL, Tsai YH, Ho BC, Bao LR, Lee TJ, Jan YJ, Zhu YZ, Cheng S, Feng FY, Chen P, Hou S, Agopian V, Hsiao YS, Tseng HR, Posadas EM, Yu HH. Glycan Stimulation Enables Purification of Prostate Cancer Circulating Tumor Cells on PEDOT NanoVelcro Chips for RNA Biomarker Detection. Adv Healthc Mater 2018; 7:10.1002/adhm.201700701. [PMID: 28892262 PMCID: PMC5803304 DOI: 10.1002/adhm.201700701] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/31/2017] [Indexed: 12/30/2022]
Abstract
A glycan-stimulated and poly(3,4-ethylene-dioxythiophene)s (PEDOT)-based nanomaterial platform is fabricated to purify circulating tumor cells (CTCs) from blood samples of prostate cancer (PCa) patients. This new platform, phenylboronic acid (PBA)-grafted PEDOT NanoVelcro, combines the 3D PEDOT nanosubstrate, which greatly enhances CTC capturing efficiency, with a poly(EDOT-PBA-co-EDOT-EG3) interfacial layer, which not only provides high specificity for CTC capture upon antibody conjugation but also enables competitive binding of sorbitol to gently release the captured cells. CTCs purified by this PEDOT NanoVelcro chip provide well-preserved RNA transcripts for the analysis of the expression level of several PCa-specific RNA biomarkers, which may provide clinical insights into the disease.
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Affiliation(s)
- Mo-Yuan Shen
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
| | - Jie-Fu Chen
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA, 90048, USA
| | - Chun-Hao Luo
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
| | - Sangjun Lee
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Cheng-Hsuan Li
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
| | - Yung-Ling Yang
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
| | - Yu-Han Tsai
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
| | - Bo-Cheng Ho
- Department of Material Engineering, Ming Chi University of Technology, 84 Gungjuan Rd., Taishan Dist., New Taipei City, 24301, Taiwan
| | - Li-Rong Bao
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Tien-Jung Lee
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Yu Jen Jan
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Ya-Zhen Zhu
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Shirley Cheng
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA, 90048, USA
| | - Felix Y Feng
- Departments of Radiation Oncology, Urology, and Medicine, University of California, San Francisco, San Francisco, CA, 94158, USA
| | - Peilin Chen
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Shuang Hou
- Liver Transplantation and Hepatobiliary Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Vatche Agopian
- Liver Transplantation and Hepatobiliary Surgery, Department of Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Yu-Sheng Hsiao
- Department of Material Engineering, Ming Chi University of Technology, 84 Gungjuan Rd., Taishan Dist., New Taipei City, 24301, Taiwan
| | - Hsian-Rong Tseng
- Department of Molecular and Medical Pharmacology, California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, CA, 90095-1770, USA
| | - Edwin M Posadas
- Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, 8700 Beverly Blvd., Los Angeles, CA, 90048, USA
| | - Hsiao-Hua Yu
- Smart Organic Material Laboratory, Institute of Chemistry, Academia Sinica, No. 128, Sec. 2, Academia Rd., Nankang, Taipei, 11529, Taiwan
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5
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Espina-Benitez MB, Randon J, Demesmay C, Dugas V. Back to BAC: Insights into Boronate Affinity Chromatography Interaction Mechanisms. SEPARATION AND PURIFICATION REVIEWS 2017. [DOI: 10.1080/15422119.2017.1365085] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Maria Betzabeth Espina-Benitez
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Jérôme Randon
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Claire Demesmay
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
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6
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A carbohydrate-binding affinity ligand for the specific enrichment of glycoproteins. J Chromatogr A 2016; 1444:8-20. [DOI: 10.1016/j.chroma.2016.03.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/22/2016] [Accepted: 03/18/2016] [Indexed: 02/07/2023]
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7
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Wang Y, Chai Z, Wang N, Sun Y, Yan Y, Gao L. Multiple Sensitivity Study of Boronic Acid-Functionalized Nanoparticles Based on the Complexation of Poly (3-methacrylamido phenylboronic acid) and Dextran. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2015. [DOI: 10.1080/10601325.2015.1007271] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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8
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Rageh AH, Pyell U. Boronate affinity-assisted MEKC separation of highly hydrophilic urinary nucleosides using imidazolium-based ionic liquid type surfactant as pseudostationary phase. Electrophoresis 2014; 36:784-95. [DOI: 10.1002/elps.201400357] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/05/2014] [Accepted: 09/20/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Azza H. Rageh
- Department of Chemistry; University of Marburg; Marburg Germany
| | - Ute Pyell
- Department of Chemistry; University of Marburg; Marburg Germany
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9
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Wang Y, Chai Z, Ma L, Shi C, Shen T, Song J. Fabrication of boronic acid-functionalized nanoparticles via boronic acid–diol complexation for drug delivery. RSC Adv 2014. [DOI: 10.1039/c4ra05034g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Takakura D, Harazono A, Hashii N, Kawasaki N. Selective glycopeptide profiling by acetone enrichment and LC/MS. J Proteomics 2014; 101:17-30. [DOI: 10.1016/j.jprot.2014.02.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 01/27/2014] [Accepted: 02/01/2014] [Indexed: 11/30/2022]
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11
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Liu H, Ponniah G, Neill A, Patel R, Andrien B. Identification and comparative quantitation of glycation by stable isotope labeling and LC-MS. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 958:90-5. [PMID: 24705536 DOI: 10.1016/j.jchromb.2014.03.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/06/2014] [Accepted: 03/16/2014] [Indexed: 11/28/2022]
Abstract
Glycation is a common modification of proteins both in vitro and in vivo. To aid identification and comparative quantitation, a method of stable isotope labeling followed by LC-MS analysis was proposed. The samples were reduced using sodium borohydride or sodium borodeuteride. Reduction of the Schiff base between the amine group and the reducing sugars resulted in a molecular weight increase of 2Da using sodium borohydride or a molecular weight increase of 3Da using sodium borodeuteride. The molecular weight difference of 1Da between peptides containing glycated lysine residue reduced using sodium borohydride or sodium borodeuteride was used to identify glycated peptides and to calculate the glycation difference between samples. The method was used to investigate glycation of a recombinant human IgG1 antibody under native and denaturing conditions. The result demonstrated a good correlation between glycation propensity of lysine residues and their solvent exposure levels.
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Affiliation(s)
- Hongcheng Liu
- Protein Characterization, Alexion Pharmaceuticals Inc, 352 Knotter Drive, Cheshire, CT CT06410, United States.
| | - Gomathinayagam Ponniah
- Protein Characterization, Alexion Pharmaceuticals Inc, 352 Knotter Drive, Cheshire, CT CT06410, United States
| | - Alyssa Neill
- Protein Characterization, Alexion Pharmaceuticals Inc, 352 Knotter Drive, Cheshire, CT CT06410, United States
| | - Rekha Patel
- Protein Characterization, Alexion Pharmaceuticals Inc, 352 Knotter Drive, Cheshire, CT CT06410, United States
| | - Bruce Andrien
- Protein Characterization, Alexion Pharmaceuticals Inc, 352 Knotter Drive, Cheshire, CT CT06410, United States
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12
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Barbosa O, Torres R, Ortiz C, Berenguer-Murcia Á, Rodrigues RC, Fernandez-Lafuente R. Heterofunctional Supports in Enzyme Immobilization: From Traditional Immobilization Protocols to Opportunities in Tuning Enzyme Properties. Biomacromolecules 2013; 14:2433-62. [DOI: 10.1021/bm400762h] [Citation(s) in RCA: 377] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Oveimar Barbosa
- Escuela de Química, Grupo
de investigación en Bioquímica y Microbiología
(GIBIM), Edificio Camilo Torres 210, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Rodrigo Torres
- Escuela de Química, Grupo
de investigación en Bioquímica y Microbiología
(GIBIM), Edificio Camilo Torres 210, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Claudia Ortiz
- Escuela de Bacteriología
y Laboratorio Clínico, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Ángel Berenguer-Murcia
- Instituto Universitario de Materiales,
Departamento de Química Inorgánica, Universidad de Alicante, Campus de San Vicente del Raspeig, Ap.
99 - 03080 Alicante, Spain
| | - Rafael C. Rodrigues
- Biocatalysis and Enzyme Technology
Lab, Institute of Food Science and Technology, Federal University of Rio Grande do Sul, Av. Bento Gonçalves,
9500, P.O. Box 15090, ZC 91501-970, Porto Alegre, RS, Brazil
| | - Roberto Fernandez-Lafuente
- Departamento de Biocatalisis, Instituto de Catálisis-CSIC, Campus UAM-CSIC,
Cantoblanco, 28049 Madrid, Spain
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13
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Srivastava A, Shakya AK, Kumar A. Boronate affinity chromatography of cells and biomacromolecules using cryogel matrices. Enzyme Microb Technol 2012; 51:373-81. [DOI: 10.1016/j.enzmictec.2012.08.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 08/15/2012] [Accepted: 08/16/2012] [Indexed: 01/27/2023]
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14
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Siegel D. Applications of reversible covalent chemistry in analytical sample preparation. Analyst 2012; 137:5457-82. [PMID: 23013801 DOI: 10.1039/c2an35697j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Reversible covalent chemistry (RCC) adds another dimension to commonly used sample preparation techniques like solid-phase extraction (SPE), solid-phase microextraction (SPME), molecular imprinted polymers (MIPs) or immuno-affinity cleanup (IAC): chemical selectivity. By selecting analytes according to their covalent reactivity, sample complexity can be reduced significantly, resulting in enhanced analytical performance for low-abundance target analytes. This review gives a comprehensive overview of the applications of RCC in analytical sample preparation. The major reactions covered include reversible boronic ester formation, thiol-disulfide exchange and reversible hydrazone formation, targeting analyte groups like diols (sugars, glycoproteins and glycopeptides, catechols), thiols (cysteinyl-proteins and cysteinyl-peptides) and carbonyls (carbonylated proteins, mycotoxins). Their applications range from low abundance proteomics to reversible protein/peptide labelling to antibody chromatography to quantitative and qualitative food analysis. In discussing the potential of RCC, a special focus is on the conditions and restrictions of the utilized reaction chemistry.
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Affiliation(s)
- David Siegel
- BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str 11, 12489 Berlin, Germany.
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15
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pH- and glucose-sensitive glycopolymer nanoparticles based on phenylboronic acid for triggered release of insulin. Carbohydr Polym 2012; 89:124-31. [PMID: 24750613 DOI: 10.1016/j.carbpol.2012.02.060] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 10/03/2011] [Accepted: 02/21/2012] [Indexed: 11/20/2022]
Abstract
Amphiphilic poly(acrylic acid-co-acrylamidophenylboronic acid)-block-poly(2-acryloxyethyl galactose)-block-poly(acrylic acid-co-acrylamidophenylboronic acid) (((PAA-co-PAAPBA)-b-)₂PAEG) copolymer was fabricated: The poly(2-acryloyloxyethyl pentaacetylgalactoside) (PAEAcG) with narrow molecular weight distributions (Mw/Mn≤1.22) was prepared by atom transfer radical polymerization (ATRP) using dibromo-p-xylene (DBX) as initiator. Then the well-defined triblock copolymer poly(t-butyl acrylate)-b-poly(2-acryloyloxyethyl pentaacetylgalactoside)-b-poly(t-butyl acrylate) (PtBA-b-PAEAcG-b-PtBA) was synthesized by ATRP of tBA using PAEAcG homopolymer with dibromo end groups as macroinitiator. After hydrolysis of t-butyl acrylate block, amide linkage and deacetylation, the final copolymer ((PAA-co-PAAPBA)-b-)₂PAEG was obtained. Because of characteristics of three different segments, amphiphilic ((PAA-co-PAAPBA)-b-)₂PAEG can self-assemble into pH- and glucose-responsive nanoparticles studied by dynamic light scattering (DLS) and transmission electron microscopy (TEM). Furthermore, the in vitro release profiles of insulin also revealed obvious pH- and glucose-sensitivity of the nanoparticles. The analysis of cell viability suggested that the copolymer nanoparticles had good cytocompatibility.
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16
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Studies on the adsorption of cell impurities from plasmid-containing lysates to phenyl boronic acid chromatographic beads. J Chromatogr A 2011; 1218:8629-37. [DOI: 10.1016/j.chroma.2011.10.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2011] [Revised: 09/08/2011] [Accepted: 10/01/2011] [Indexed: 11/17/2022]
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17
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Borlido L, Azevedo A, Roque A, Aires-Barros M. Potential of boronic acid functionalized magnetic particles in the adsorption of human antibodies under mammalian cell culture conditions. J Chromatogr A 2011; 1218:7821-7. [DOI: 10.1016/j.chroma.2011.08.084] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 08/25/2011] [Accepted: 08/27/2011] [Indexed: 10/17/2022]
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18
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De Guzman JM, Soper SA, McCarley RL. Assessment of glycoprotein interactions with 4-[(2-aminoethyl)carbamoyl]phenylboronic acid surfaces using surface plasmon resonance spectroscopy. Anal Chem 2010; 82:8970-7. [PMID: 20919681 PMCID: PMC3035744 DOI: 10.1021/ac101911a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reported here are analyses of the interactions between a select group of solution-phase glycoproteins and a unique boronic acid capture surface. The boronic acid derivative, 4-[(2-aminoethyl)carbamoyl]phenylboronic acid, AECPBA, was synthesized and then immobilized on carboxymethyl dextran surfaces using simple coupling methods. From surface plasmon resonance spectroscopy responses, it is found that model glycoproteins interact strongly with the AECPBA surface and subsequently can be readily released from the AECPBA surface using borate buffer. A striking difference between the glycoproteins fetuin and asialofetuin (desialylated fetuin), in terms of glycoprotein binding to the AECPBA surface, indicates that the interaction of glycoproteins with the immobilized AECPBA is dictated by the terminal saccharide of the heteroglycan chain. Surprisingly, secondary interactions of glycosylated and nonglycosylated proteins with the carboxymethyl dextran hydrogel matrix are observed. Importantly, it is demonstrated that use of tris(hydroxymethyl)aminomethane buffer allows for decreased secondary interactions of nonglycosylated proteins on the AECPBA/dextran surface, as noted with the model protein ExtrAvidin.
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Affiliation(s)
- Jennifer Macalindong De Guzman
- Department of Chemistry and Center for BioModular Multi-scale Systems, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana, 70803-1804
| | - Steven A. Soper
- Department of Chemistry and Center for BioModular Multi-scale Systems, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana, 70803-1804
| | - Robin L. McCarley
- Department of Chemistry and Center for BioModular Multi-scale Systems, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana, 70803-1804
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19
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Wang B, Ma R, Liu G, Liu X, Gao Y, Shen J, An Y, Shi L. Effect of Coordination on the Glucose-Responsiveness of PEG-b-(PAA-co-PAAPBA) Micelles. Macromol Rapid Commun 2010; 31:1628-34. [DOI: 10.1002/marc.201000164] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 04/24/2010] [Indexed: 11/08/2022]
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20
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He J, Liu Z, Ren L, Liu Y, Dou P, Qian K, Chen HY. On-line coupling of in-tube boronate affinity solid phase microextraction with high performance liquid chromatography–electrospray ionization tandem mass spectrometry for the determination of cis-diol biomolecules. Talanta 2010; 82:270-6. [DOI: 10.1016/j.talanta.2010.04.033] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 04/15/2010] [Accepted: 04/16/2010] [Indexed: 10/19/2022]
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Panahi H, Rahimi A, Moniri E, Izadi A, Parvin M. HPTLC separation and quantitative analysis of aspirin, salicylic acid, and sulfosalicylic acid. JPC-J PLANAR CHROMAT 2010. [DOI: 10.1556/jpc.23.2010.2.10] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Preinerstorfer B, Lämmerhofer M, Lindner W. Synthesis and application of novel phenylboronate affinity materials based on organic polymer particles for selective trapping of glycoproteins. J Sep Sci 2009; 32:1673-85. [PMID: 19472289 DOI: 10.1002/jssc.200800679] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We report on synthesis concepts for the fabrication of various novel phenylboronate affinity materials based on polymethacrylate epoxy beads (Fractogel EMD Epoxy (M) 40-90 microm) and the testing of these functionalized polymer particles for selective trapping of a glycoprotein from a standard mixture containing a glycosylated and a nonglycosylated protein. Two inherently different approaches for the functionalization of the bare beads with boronate groups have been elucidated. In the first, the epoxy residues of the polymer particles were converted into reactive thiol groups which were subsequently used as anchor moieties for the immobilization of 4-vinylphenylboronic acid by radical addition or radical polymerization reaction. Three different ways for the generation of sulfhydryl groups have been examined leading to materials with distinct linker chemistries. In the second and more straightforward approach, the epoxy groups were reacted with 4-mercaptophenylboronic acid. The novel materials were thoroughly characterized by (i) quantitation of the sulfur content by elemental analysis, (ii) reactive sulfhydryls were determined in a photospectrometric assay, (iii) boron content was measured by inductively coupled plasma-atomic emission spectrometry, and (iv) the amount of reactive boronate groups was evaluated in a fast binding assay employing adenosine as test compound. A maximum concentration of 1.2 mmol boronate groups per gram dry beads could be achieved by the presented synthesis routes. Employing the novel phenylboronate affinity materials in capture and release experiments in the batch mode, a standard glycoprotein, viz. transferrin (Tf) from human serum was separated from a nonglycosylated protein, BSA. A commercial boronate affinity material based on 3-aminophenylboronic acid modified agarose gel was employed as reference material and was found to perform significantly worse compared to the herein presented novel polymethacrylate particles.
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Affiliation(s)
- Beatrix Preinerstorfer
- Christian Doppler Laboratory for Molecular Recognition Materials, Department of Analytical Chemistry and Food Chemistry, University of Vienna, Vienna, Austria
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Zhang B, Mathewson S, Chen H. Two-dimensional liquid chromatographic methods to examine phenylboronate interactions with recombinant antibodies. J Chromatogr A 2009; 1216:5676-86. [DOI: 10.1016/j.chroma.2009.05.084] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 05/21/2009] [Accepted: 05/27/2009] [Indexed: 11/16/2022]
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24
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Rodrigues ME, Costa AR, Henriques M, Azeredo J, Oliveira R. Technological progresses in monoclonal antibody production systems. Biotechnol Prog 2009; 26:332-51. [DOI: 10.1002/btpr.348] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Kumar A, Bhardwaj A. Methods in cell separation for biomedical application: cryogels as a new tool. Biomed Mater 2008; 3:034008. [DOI: 10.1088/1748-6041/3/3/034008] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Gillespie E, Connolly D, Nesterenko PN, Paull B. Accurate non-invasive determination of pKa of surface functionalised ion exchange monoliths using capacitively coupled contactless conductivity detection. Analyst 2008; 133:874-6. [DOI: 10.1039/b803349h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Monzo A, Bonn GK, Guttman A. Boronic acid–lectin affinity chromatography. 1. Simultaneous glycoprotein binding with selective or combined elution. Anal Bioanal Chem 2007; 389:2097-102. [PMID: 17909756 DOI: 10.1007/s00216-007-1627-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2007] [Revised: 09/11/2007] [Accepted: 09/12/2007] [Indexed: 10/22/2022]
Abstract
We introduce a novel combination of boronic acid affinity chromatography with lectin affinity chromatography, dubbed as boronic acid-lectin affinity chromatography (BLAC). Concanavalin A and wheat germ agglutinin lectins were mixed with the pesudo-lectin boronic acid to form the BLAC affinity column and their performance was evaluated with standard glycoproteins. Optimization of the binding and elution buffers for the BLAC system is described. The BLAC columns were employed to isolate glycoproteins of interest using both selective and/or combined elution.
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Affiliation(s)
- Alex Monzo
- Horváth Laboratory of Bioseparation Sciences, Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innrain 66, 6020, Innsbruck, Austria
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Monzo A, Bonn GK, Guttman A. Lectin-immobilization strategies for affinity purification and separation of glycoconjugates. Trends Analyt Chem 2007. [DOI: 10.1016/j.trac.2007.01.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Millea KM, Krull IS. Subproteomics in Analytical Chemistry: Chromatographic Fractionation Techniques in the Characterization of Proteins and Peptides. J LIQ CHROMATOGR R T 2007. [DOI: 10.1081/jlc-120023244] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Kevin M. Millea
- a Department of Chemistry and Chemical Biology , Northeastern University , 102 Hurtig Hall, 360 Huntington Ave., Boston , Massachusetts , 02115 , USA
| | - Ira S. Krull
- a Department of Chemistry and Chemical Biology , Northeastern University , 102 Hurtig Hall, 360 Huntington Ave., Boston , Massachusetts , 02115 , USA
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30
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Rzayev ZMO, Beşkardeş O. Boron-Containing Functional Copolymers for Bioengineering Applications. ACTA ACUST UNITED AC 2007. [DOI: 10.1135/cccc20071591] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This review summarizes the some advances and results of our recent investigations, outlining the synthesis, structural phenomena, unique properties and application areas of boron-containing bioengineering copolymers. Particular attention is paid to the effects of hydrogen bonding in copolymerization reactions of boron-containing monomers, and in formation of supramacromolecular structures, bioconjugates, physically and chemically crosslinkable copolymers, and other important bioengineering materials.
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Kuzimenkova MV, Ivanov AE, Galaev IY. Boronate-Containing Copolymers: Polyelectrolyte Properties and Sugar-Specific Interaction with Agarose Gel. Macromol Biosci 2006; 6:170-8. [PMID: 16456876 DOI: 10.1002/mabi.200500185] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Copolymers of N-acryloyl-m-aminophenylboronic acid (NAAPBA) with acryamide (AA), N,N-dimethylacrylamide (DMAA), and N-isopropylacrylamide (NIPAM) were found to adsorb on cross-linked agarose gel (Sepharose CL-6B) in the pH range from 7.5-9.2, due to specific boronate-sugar interactions. The molar percentages of phenylboronic acid (PBA) groups in the boronate-containing copolymers (BCCs), as estimated by 1H NMR spectroscopy, were 13, 10, and 16%, respectively, whereas the apparent ionization constants, the pKa values, of the copolymers were similar and equal to 9.0 +/- 0.2 at 20 degrees C. The copolymers adsorption capacities were in the range of 15-30 mg x ml(-1) gel (14-36 micromol pendant PBA ml(-1) gel) at pH 9.2 and decreased with decreasing pH value. The interaction of monomeric NAAPBA with Sepharose CL-6B was characterized by an equilibrium association constant of 53 +/- 17 M(-1), the chromatographic capacity factor k' = 1.8, and a total content of binding sites of 27 +/- 10 micromol x ml(-1) gel at pH 9.2. The weak reversible binding of monomeric NAAPBA and almost irreversible binding of NAAPBA copolymers to the gel at pH 9.2 suggested a multivalent character of the copolymer adsorption. At pH 7.5, the maximal adsorption capacity was displayed by the AA-NAAPBA copolymer (15 mg x ml(-1) gel). All the BCCs could be completely desorbed from the gel by 0.1 M fructose in aqueous buffered media with pH values from 7.5-9.2. The strong adsorption of AA-NAAPBA on agarose gel probably relates to the conformation of the copolymer in aqueous solution and provides opportunities for biomedical applications of the copolymer under physiological conditions. Multivalent, weak-affinity adsorption of BCCs to the agarose gel seems to be a tentative model for the copolymers' binding to oligo- and polysaccharides of cell membranes and mucosal surfaces.
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Affiliation(s)
- Marina V Kuzimenkova
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100, Lund, Sweden
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Ivanov AE, Galaev IY, Mattiasson B. Interaction of sugars, polysaccharides and cells with boronate-containing copolymers: from solution to polymer brushes. J Mol Recognit 2006; 19:322-31. [PMID: 16865663 DOI: 10.1002/jmr.792] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Interaction of mono- and disaccharides, polysaccharide particles and yeast cells with boronate-containing copolymers (BCC) of N-acryloyl-m-aminophenylboronic acid (NAAPBA) with N,N-dimethylacrylamide (DMAA) or N-isopropylacrylamide (NIPAM) was studied. The binding of saccharides to BCC of NIPAM resulted in a shift of its phase transition temperature (DeltaTP), which provided a quantitative measure for the complex formation. Among the sugars typical of non-reducing ends of glycoproteins the DeltaTP decreased in the order: N-acetylneuraminic acid > xylose approximately galactose > mannose approximately fucose >> N-acetylglucosamine. Strong specific adsorption of the BCC on the cross-linked agarose gel Sepharose CL-6B (15-30 mg/ml gel at pH 9.2) was registered. The copolymers adsorption was due to boronate-sugar interactions and decreased with pH. Multivalent interaction of the BCC with the agarose gel has been proven by liquid column chromatography exhibiting a weak reversible adsorption of NAAPBA and almost irreversible adsorption of DMAA-NAAPBA copolymer from 0.1 M sodium phosphate buffer, pH 7.9. The two studied BCCs could be completely desorbed from the gel by 0.1 M fructose in aqueous buffered media with pH from 7.5 to 9.2. In turn, the agarose particles and yeast cells were found to adhere to siliceous supports end-grafted with boronate-BCC of N,N-dimethylacrylamide at pH > or = 7.5, due to the actions. Quantitative detachment of adhered particles or cells could be attained by addition of 20 mM or 100 mM fructose, respectively, in the pH range from 7.5 to 9.2. Affinity adhesion of micron-size carbohydrate particles to boronate-containing polymer brushes fixed on solid supports was considered as a model system suggesting a new approach to isolation and separation of living cells.
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Affiliation(s)
- Alexander E Ivanov
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, SE-221 00 Lund, Sweden
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Torres R, Pessela B, Fuentes M, Munilla R, Mateo C, Fernández-Lafuente R, Guisán JM. Stabilization of enzymes by multipoint attachment via reversible immobilization on phenylboronic activated supports. J Biotechnol 2005; 120:396-401. [PMID: 16129505 DOI: 10.1016/j.jbiotec.2005.06.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2005] [Revised: 06/16/2005] [Accepted: 06/27/2005] [Indexed: 11/18/2022]
Abstract
In this work, we have used supports activated with m-amino-phenylboronic groups to "reversibly" immobilize proteins under very mild conditions. Most of the proteins contained in a crude extract from E. coli could be immobilized on Eupergit C-250 L activated with phenylboronic and then fully desorbed from the support by using mannitol or SDS. This suggested that the immobilization of the proteins on these supports was not only via sugars interaction, but also by other interaction/s, quite unspecific, that might be playing a key role in the immobilization of the proteins. Penicillin acylase from E. coli (PGA) was also immobilized in Eupergit C activated with m-amino-phenylboronic groups. The enzyme could be fully desorbed with mannitol immediately after being immobilized on the support. However, longer incubation times of the immobilized preparation caused a reduction of protein elution from the boronate support in presence of mannitol. Moreover, these immobilized preparations showed a higher stability in the presence of organic solvents than the soluble enzyme; the stability also improved when the incubation time was increased (to a factor of 100). By desorbing the weakest bound enzyme molecules, it was possible to correlate adsorption strength with stabilization; therefore, it seems that this effect was due to the rigidification of the enzyme via multipoint attachment on the support.
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Affiliation(s)
- Rodrigo Torres
- Departamento de Biocatálisis, Instituto de Catálisis-CSIC, Campus Universidad Autónoma, Cantoblanco, 28049 Madrid, Spain
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Ivanov AE, Galaev IY, Mattiasson B. Binding of Adenosine to Pendant Phenylboronate Groups of Thermoresponsive Copolymer: a Quantitative Study. Macromol Biosci 2005; 5:795-800. [PMID: 16096993 DOI: 10.1002/mabi.200500035] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Binding of adenosine to the thermosensitive copolymer of N-isopropylacrylamide and 3-(acrylamido)aminophenylboronic acid (82:18, Mn = 47,000 g . mol(-1)) was studied by equilibrium dialysis at 22 degrees C and 37 degrees C, in a 0.1 M glycine buffer containing 0.1 M NaCl at pH 9.2. The copolymer exhibited a the phase transition temperature (T(p)) of 26.5 degrees C under the above conditions. At 22 degrees C the binding of adenosine to the water-soluble copolymer was well described by a Langmuir model, accounting for preferential ionisation of the boronate-nucleoside complexes and, therefore, restricted reactivity of the rest of boronates. At saturation, the copolymer contained 38% of its phenylboronic acid groups in the form of complexes, whereas the association constant was 1,400 M(-1). At 37 degrees C no binding of adenosine to thermally precipitated copolymer was found, presumably owing to interaction of the phenylboronates with hydrophobic segments of polyNIPAM. At high loading of the copolymer by the reversibly bound adenosine the T(p) steeply increases with increasing fraction of the phenylboronate-adenosine complexes in the chains. The increase of the T(p) observed above the saturating adenosine concentration (>1 x 10(-3) M, 22 degrees C) very probably testifies to competition of the nucleoside with hydrophobic polyNIPAM segments for binding to the pendant phenylboronates.
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Affiliation(s)
- Alexander E Ivanov
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, S-221 00 Lund, Sweden
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35
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Foettinger A, Leitner A, Lindner W. Solid-phase capture and release of arginine peptides by selective tagging and boronate affinity chromatography. J Chromatogr A 2005; 1079:187-96. [PMID: 16038304 DOI: 10.1016/j.chroma.2005.03.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
A method for the selection of arginine-containing peptides from a mixture by a solid phase capture and release technique is presented. The method is based on the covalent modification of the guanidine group of arginine with 2,3-butanedione and phenylboronic acid under alkaline conditions. Using polymeric materials with immobilised phenylboronic acid the arginine-peptides can be captured on a solid support while arginine-free peptides are not covalently bound and can be washed away. Finally, the arginine-peptides can be cleaved again from the boronic acid beads due to the reversibility of the reaction. The recovered peptides are then analysed by liquid chromatography-tandem mass spectrometry. The method was optimised with model peptides with regard to the non-specific binding of arginine-free peptides and quantitative cleavage of the label after the selection step. Using an adequate protocol, the applicability towards more complex samples was successfully tested with a tryptic digest of a mixture of three standard proteins.
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Affiliation(s)
- A Foettinger
- Christian Doppler Laboratory for Molecular Recognition Materials, Institute of Analytical Chemistry, University of Vienna, Vienna, Austria
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Ivanov A, Larsson H, Galaev I, Mattiasson B. Synthesis of boronate-containing copolymers of N,N-dimethylacrylamide, their interaction with poly(vinyl alcohol) and rheological behaviour of the gels. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.02.022] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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Li Y, Jeppsson JO, Jörntén-Karlsson M, Linné Larsson E, Jungvid H, Galaev IY, Mattiasson B. Application of shielding boronate affinity chromatography in the study of the glycation pattern of haemoglobin. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 776:149-60. [PMID: 12137996 DOI: 10.1016/s1570-0232(02)00162-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Human haemoglobin (Hb) may appear in a number of glycated species. The glycation pattern of Hb using shielding boronate affinity chromatography (SBAC) has been studied in the present work. SBAC is a novel separation technique, which eliminates nonspecific boronate-protein interactions by introducing a so-called shielding reagent. Two samples from Bio-Rad (Lyphochek)--one from normal persons' blood with relatively low HbA(1c) level (HbL) and the other from diabetic patients' blood with an elevated HbA(1c) level (HbH)--were used for the investigation. Glycated Hb (GHb) was separated from nonglycated Hb species using Tris as the shielding reagent. Two eluted peaks, eluted peak 1 (E1) and eluted peak 2 (E2), were obtained using a linear gradient elution with Tris. Several bands were observed on isoelectric focusing gel, which showed the same migration positions as Hb adducts, such as HbA(0), which is major Hb component containing two alpha chains and two beta chains; HbA(1c), which is post-translational glycation on the N-terminus of the beta chains of HbA(0); Foetal Hb (HbF), consisting of two alpha chains and two gamma chains; and glutathione Hb (also called HbSSG), which is the result from thiol-disulphide interchain exchange during oxidation of the thiol groups of Hb. In both HbL and HbH samples, E2 exhibited slightly higher amounts of HbF than E1. Electrospray-ionisation mass spectrometry showed that: (1) HbL-E1 was glycated with single glucose on both alpha and beta chains while no observable glycated chains were present in HbL-E2; (2) both HbH-E1 and HbH-E2 were glycated with single glucoses on both alpha and beta chains, however, compared with HbH-E1, HbH-E2 showed a higher relative intensity of the glycated beta chain and lower relative intensity of the glycated alpha chain; and (3) the degree of glycation increased with increasing glycation level of the sample. The amount of HbA(1c) presented in the eluted peaks was further determined using enzymatic digestion of glycated Hb by endoproteinase Glu-C and the subsequent separation and analysis of the digested peptides by reversed-phase high-performance liquid chromatography and capillary electrophoresis. The values of HbA(1c)/HbA(0) of the eluted peaks, i.e. HbL-E1, HbL-E2, HbH-E1 and HbH-E2, were 0.27, 0.19, 0.50 and 0.43, respectively. In both HbL and HbH samples, E1 contained higher amounts of HbA(1c) than E2. This study demonstrates the structural heterogeneity of GHb as well as the possibility of using SBAC to detect glycated species of Hb.
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Affiliation(s)
- YuCai Li
- Gramineer International AB, IDEON, SE-223 70 Lund, Sweden
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Li Y, Pfüller U, Larsson EL, Jungvid H, Mattiasson B. Separation of mistletoe lectins based on the degree of glycosylation using boronate affinity chromatography. J Chromatogr A 2001; 925:115-21. [PMID: 11519797 DOI: 10.1016/s0021-9673(01)00967-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A mixture of two mistletoe lectins (MLs) has been separated according to the degree of glycosylation using boronate affinity chromatography. The mistletoe lectins, mistletoe lectin I (MLI) and mistletoe lectin III (MLIII) with degrees of glycosylation of 6.1 and 3.8%, respectively, were used in the investigation. MLI exhibited a higher retention time than MLIII due to its higher degree of glycosylation. Separation was confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The developed method may lead to new applications for the boronate affinity technique, as well as provide an alternative separation method for MLs.
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Affiliation(s)
- Y Li
- Gramineer International AB, IDEON, Lund, Sweden
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Makar TK, Nedergaard M, Preuss A, Hertz L, Cooper AJ. Glutamine transaminase K and omega-amidase activities in primary cultures of astrocytes and neurons and in embryonic chick forebrain: marked induction of brain glutamine transaminase K at time of hatching. J Neurochem 1994; 373:179-91. [PMID: 8158144 DOI: 10.1016/j.ab.2007.09.027] [Citation(s) in RCA: 161] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 08/29/2007] [Accepted: 09/24/2007] [Indexed: 12/17/2022]
Abstract
Glutamine transaminase K and omega-amidase activities are present in the chick brain and in the brains of adult mice, rats, and humans. However, the activity of glutamine transaminase K in adult mouse brain is relatively low. In the chick embryo, cerebral glutamine transaminase K activity is low between embryonic days 5 and 17, but by day 23 (day of hatching) activity rises dramatically (> 15-fold). Cerebral omega-amidase activity is relatively high at embryonic day 5 but lower between days 5 and 17; at embryonic day 23 the activity rises to a maximum. Both glutamine transaminase K and omega-amidase are present in cultured chick, rat, and mouse astrocytes and neurons. For each species, the activity of glutamine transaminase K is higher in the astrocytes than in the neurons. The activity of omega-amidase is about the same in the cultured chick astrocytes and neurons but significantly higher in rat astrocytes than in rat neurons. The data suggest that the rise in brain glutamine transaminase K activity in the chick embryo at hatching correlates with maturation of astrocytes. Glutamine transaminase K may be involved in glutamine cycling in astrocytes. Glutamine transaminase K appears to be a major cysteine S-conjugate beta-lyase of the brain and may play a role in the neurotoxicity associated with exposure to dichloroacetylene and perhaps to other toxins.
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Affiliation(s)
- T K Makar
- Department of Biochemistry, Cornell University Medical College, New York, New York 10021
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