1
|
Lin L, Sun H, Zhang K, Zhong Y, Cheng Q, Bian X, Xin Q, Cheng B, Feng X, Zhang Y. Novel affinity membranes with macrocyclic spacer arms synthesized via click chemistry for lysozyme binding. JOURNAL OF HAZARDOUS MATERIALS 2017; 327:97-107. [PMID: 28043047 DOI: 10.1016/j.jhazmat.2016.12.047] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/22/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
Affinity membrane has great potential for applications in bioseparation and purification. Disclosed herein is the design of a novel affinity membrane with macrocyclic spacer arms for lysozyme binding. The clickable azide-cyclodextrin (CD) arms and clickable alkyne ethylene-vinyl alcohol (EVAL) chains are designed and prepared. By the azide-alkyne click reaction, the EVAL-CD-ligands affinity membranes with CD spacer arms in three-dimensional micro channels have been successfully fabricated. The FT-IR, XPS, NMR, SEM and SEM-EDS results give detailed information of structure evolution. The abundant pores in membrane matrix provide efficient working channels, and the introduced CD arms with ligands (affinity sites) provide supramolecular atmosphere. Compared with that of raw EVAL membrane, the adsorption capacity of EVAL-CD-ligands membrane (26.24mg/g) show a triple increase. The study indicates that three effects (inducing effect, arm effect, site effect) from CD arms render the enhanced performance. The click reaction happened in membrane matrix in bulk. The effective lysozyme binding and higher adsorption performance of affinity membranes described herein compared with other reported membranes are markedly related with the proposed strategy involving macrocyclic spacer arms and supramolecular working channels.
Collapse
Affiliation(s)
- Ligang Lin
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Hui Sun
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Kaiyu Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Yonghui Zhong
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Qi Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Xihui Bian
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Qingping Xin
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Bowen Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China; Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Xianshe Feng
- Department of Chemical Engineering, University of Waterloo, Waterloo, ONT., N2L 3G1, Canada
| | - Yuzhong Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, PR China
| |
Collapse
|
2
|
Men J, Wang R, Hu X, Zhao H, Wei H, Hu C, Gao B. Preparation of heparin-functionalized microspheres and study on their adsorption characteristic for basic protein lysozyme. Macromol Res 2016. [DOI: 10.1007/s13233-016-2016-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
3
|
Yu YT, Zhu H, Wang S. Amphiphilic polyvinyl alcohol adsorbent for the removal of low-density lipoprotein. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 43:117-23. [PMID: 24813224 DOI: 10.3109/21691401.2014.909823] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Spacer can effectively reduce the steric hindrance and synergistic effect of the hydrophilic and hydrophobic ligands immobilized in adsorbents can improve the specific adsorption for low-density lipoprotein (LDL). In this paper, in order to improve the adsorption capacity for the Low-density lipoprotein-cholesterol (LDL-C), specifically, amphiphilic adsorbent based on polyvinyl alcohol (PVA) containing cholesterol ligand and sulfonic dextran ligands was synthesized. All kinds of factors affecting the synthesis yield and adsorption properties were studied in detail. Results showed that the amphiphilic PVA adsorbent has higher adsorption capacity for total cholesterol (TC), (LDL-C), triglyceride (TG), and lower adsorption capacity, and percentage for high-density lipoprotein-cholesterol (HDL-C), while the ligand ratio of cholesterol to sulfonic ligands is 1.57:1, the adsorption percentage and adsorption capacity for TC, LDL-C, TG, and HDL-C were 54.4%, 67.6%, 42.5%, 10.4% and 4.02, 3.612, 2.154, 0.168 mg/g, respectively.
Collapse
Affiliation(s)
- Yao Ting Yu
- The Key Laboratory of Bioactive Materials, Ministry of Education, Nankai University , Tianjin , P. R. China
| | | | | |
Collapse
|
4
|
Hou X, Zhang T, Cao A. Preparation of new amphiphilic macroporous nonwoven polymeric adsorbents aimed for selective removal of low-density lipoprotein from plasma. J Biomed Mater Res B Appl Biomater 2014; 103:52-61. [DOI: 10.1002/jbm.b.33190] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 03/25/2014] [Accepted: 04/05/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Xiaodong Hou
- Lab of Materials Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; Shanghai 200032 China
| | - Tao Zhang
- Lab of Materials Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; Shanghai 200032 China
| | - Amin Cao
- Lab of Materials Science, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; Shanghai 200032 China
| |
Collapse
|
5
|
Hou X, Zhang T, Cao A. A heparin modified polypropylene non-woven fabric membrane adsorbent for selective removal of low density lipoprotein from plasma. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3130] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiaodong Hou
- Laboratory for Polymer Materials, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road Shanghai 200032 China
- School of Chemistry and Chemical Technology; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Tao Zhang
- School of Chemistry and Chemical Technology; Shanghai Jiao Tong University; 800 Dongchuan Road Shanghai 200240 China
| | - Amin Cao
- Laboratory for Polymer Materials, Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 354 Fenglin Road Shanghai 200032 China
| |
Collapse
|
6
|
Heldt CL, Gurgel PV, Jaykus LA, Carbonell RG. Porcine parvovirus removal using trimer and biased hexamer peptides. Biotechnol J 2011; 7:558-65. [PMID: 21751387 DOI: 10.1002/biot.201000397] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 06/06/2011] [Accepted: 07/08/2011] [Indexed: 11/06/2022]
Abstract
Assuring the microbiological safety of biological therapeutics remains an important concern. Our group has recently reported small trimeric peptides that have the ability to bind and remove a model nonenveloped virus, porcine parvovirus (PPV), from complex solutions containing human blood plasma. In an effort to improve the removal efficiency of these small peptides, we created a biased library of hexamer peptides that contains two previously reported trimeric peptides designated WRW and KYY. This library was screened and several hexamer peptides were discovered that also removed PPV from solution, but there was no marked improvement in removal efficiency when compared to the trimeric peptides. Based on simulated docking experiments, it appeared that hexamer peptide binding is dictated more by secondary structure, whereas the binding of trimeric peptides is dominated by charge and hydrophobicity. This study demonstrates that trimeric and hexameric peptides may have different, matrix-specific roles to play in virus removal applications. In general, the hexamer ligand may perform better for binding of specific viruses, whereas the trimer ligand may have more broadly reactive virus-binding properties.
Collapse
Affiliation(s)
- Caryn L Heldt
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, USA
| | | | | | | |
Collapse
|
7
|
Oriented immobilized anti-LDL antibody carrying poly(hydroxyethyl methacrylate) cryogel for cholesterol removal from human plasma. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2011. [DOI: 10.1016/j.msec.2011.03.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
8
|
Kim J. Formation, Structure, and Reactivity of Amino-Terminated Organic Films on Silicon Substrates. ACS SYMPOSIUM SERIES 2011. [DOI: 10.1021/bk-2011-1062.ch006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Joonyeong Kim
- Department of Chemistry, Buffalo State, State University of New York, 1300 Elmwood Avenue, Buffalo, New York 14222
| |
Collapse
|
9
|
Kim J, Cho J, Seidler PM, Kurland NE, Yadavalli VK. Investigations of chemical modifications of amino-terminated organic films on silicon substrates and controlled protein immobilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:2599-608. [PMID: 20095550 DOI: 10.1021/la904027p] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Fourier transform infrared spectroscopy by grazing-angle attenuated total reflection (FTIR-GATR), ellipsometry, atomic force microscopy (AFM), UV-visible spectroscopy, and fluorescence microscopy were employed to investigate chemical modifications of amino-terminated organic thin films on silicon substrates, protein immobilization, and the biological activity and hydrolytic stability of immobilized proteins. Amino-terminated organic films were prepared on silicon wafers by self-assembling 3-aminopropyltriethoxysilane (APTES) in anhydrous toluene. Surface amino groups were derivatized into three different linkers: N-hydroxysuccinimide (NHS) ester, hydrazide, and maleimide ester groups. UV-visible absorption measurements and fluorescence microscopy revealed that more than 40% of surface amino groups were chemically modified. Protein immobilization was carried out on modified APTES films containing these linkers via coupling with primary amines (-NH(2)) in intact monoclonal rabbit immunoglobulin G (IgG), the aldehyde (-CHO) of an oxidized carbohydrate residue in IgG, or the sulfhydryl (-SH) of fragmented half-IgG, respectively. FTIR spectra contain vibrational signatures of these functional groups present in modified APTES films and immobilized IgGs. Changes in the APTES film thickness after chemical modifications and protein immobilization were also observed by ellipsometric measurements. The biological activity and long-term hydrolytic stability of immobilized IgGs on modified APTES films were estimated by fluorescence measurements of an adsorbed antigen, fluorescein isothiocyanate (FITC)-labeled goat anti-rabbit IgG (FITC-Ab). Our results indicate that the FITC-Ab binding capacity of half-IgG immobilized via maleimide groups is greater than that of the oxidized IgG and the intact IgG immobilized via hydrazide and NHS ester groups, respectively. In addition, IgGs immobilized using all coupling chemistries were hydrolytically stable in phosphate-buffered saline (PBS).
Collapse
Affiliation(s)
- Joonyeong Kim
- Department of Chemistry, Buffalo State, State University of New York, 1300 Elmwood Avenue, Buffalo, New York 14222, USA.
| | | | | | | | | |
Collapse
|
10
|
Wang W, Xie H, Sun L, Ou L, Wang L, Yu Y, Kong D. Macroporous poly(vinyl alcohol) microspheres bearing phosphate groups as a new adsorbent for low-density lipoprotein apheresis. Biomed Mater 2009; 4:065007. [DOI: 10.1088/1748-6041/4/6/065007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
11
|
Alikhani A, Korchagina EY, Chinarev AA, Bovin NV, Federspiel WJ. High molecular weight blood group A trisaccharide-polyacrylamide glycoconjugates as synthetic blood group A antigens for anti-A antibody removal devices. J Biomed Mater Res B Appl Biomater 2009; 91:845-854. [PMID: 19582848 PMCID: PMC5944835 DOI: 10.1002/jbm.b.31466] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Specific immunoadsorption of blood group antibodies by synthetic antigens immobilized on support matrices in the peri-transplantation period provides a promising solution to hyperacute rejection risk following ABO-incompatible transplantation. In this study, we investigated binding interactions between anti-A antibodies and synthetic blood group A trisaccharide conjugated with polyacrylamide of different molecular weights (30 and 1000 kDa). The glycopolymers were equipped with biotin tags and deposited on streptavidin-coated sensor chips. The affinity and kinetics of anti-A antibodies binding to glycoconjugates were studied using surface plasmon resonance (SPR). The high molecular weight conjugate (Atri-PAA(1000)-biotin) enhanced antibody binding capacity by two to three fold compared with the low molecular weight conjugate (Atri-PAA(30)-biotin), whereas varying the carbohydrate content in Atri-PAA(1000)-biotin (20 mol % or 50 mol %) did not affect antibody binding capacity of the glycoconjugate. The obtained results suggest that immunoadsorption devices, especially hollow fiber-based antibody filters which are limited in available surface area for antigen immobilization, may greatly benefit from the new synthetic high molecular weight polyacrylamide glycoconjugates.
Collapse
Affiliation(s)
- Azadeh Alikhani
- McGowan Institute for Regenerative Medicine University of Pittsburgh Pittsburgh, PA 15203
- Department of Chemical Engineering, University of Pittsburgh Pittsburgh, PA 15203
| | - Elena Y. Korchagina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences Moscow, Russia
| | - Alexander A. Chinarev
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences Moscow, Russia
| | - Nicolai V. Bovin
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry Russian Academy of Sciences Moscow, Russia
| | - William J. Federspiel
- McGowan Institute for Regenerative Medicine University of Pittsburgh Pittsburgh, PA 15203
- Department of Chemical Engineering, University of Pittsburgh Pittsburgh, PA 15203
- Department of Surgery, University of Pittsburgh Pittsburgh, PA 15203
- Department of Bioengineering University of Pittsburgh Pittsburgh, PA 15203
| |
Collapse
|
12
|
Wang S, Guo X, Wang L, Wang W, Yu Y. Effect of PEG Spacer on Cellulose Adsorbent for the Removal of Low Density Lipoprotein-Cholesterol. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/10731190500430222] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
13
|
Hu MX, Wan LS, Xu ZK. Multilayer adsorption of lectins on glycosylated microporous polypropylene membranes. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2009.03.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
14
|
Yin M, Yuan Y, Liu C, Wang J. Development of mussel adhesive polypeptide mimics coating for in-situ inducing re-endothelialization of intravascular stent devices. Biomaterials 2009; 30:2764-73. [DOI: 10.1016/j.biomaterials.2009.01.039] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 01/19/2009] [Indexed: 10/21/2022]
|
15
|
Cao T, Wang A, Liang X, Tang H, Auner GW, Salley SO, Ng KS. Functionalization of AlN surface and effect of spacer density on Escherichia coli pili-antibody molecular recognition. Colloids Surf B Biointerfaces 2008; 63:176-82. [DOI: 10.1016/j.colsurfb.2007.11.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2007] [Revised: 11/29/2007] [Accepted: 11/29/2007] [Indexed: 11/24/2022]
|
16
|
Heldt CL, Gurgel PV, Jaykus L, Carbonell RG. Identification of trimeric peptides that bind porcine parvovirus from mixtures containing human blood plasma. Biotechnol Prog 2008; 24:554-60. [PMID: 18470993 PMCID: PMC7161850 DOI: 10.1021/bp070412c] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2007] [Accepted: 04/07/2008] [Indexed: 01/26/2023]
Abstract
Virus contamination in human therapeutics is of growing concern as more therapeutic products from animal or human sources come into the market. All biopharmaceutical processes are required to have at least two distinct viral clearance steps to remove viruses. Most of these steps work well for enveloped viruses and large viruses, whether enveloped or not. That leaves a class of small non-enveloped viruses, like parvoviruses and hepatitis A, which are not easily removed by these typical steps. In this study, we report the identification of trimeric peptides that bind specifically to porcine parvovirus (PPV) and their potential use to remove this virus from process solutions. All of the trimeric peptides isolated completely removed all detectable PPV from buffer in the first nine column volumes, corresponding to a clearance of 4.5-5.5 log of infectious virus. When the virus was spiked into a more complex matrix consisting of 7.5% human blood plasma, one of the trimers, WRW, was able to remove all detectable PPV in the first three column volumes, after which human blood plasma began to interfere with the binding of the virus to the peptide resin. These trimer resins removed considerably more virus than weak ion exchange resins. The results of this work indicate that small peptide ligand resins have the potential to be used in virus removal processes where removal of contaminating virus is necessary to ensure product safety.
Collapse
Affiliation(s)
- Caryn L. Heldt
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
| | - Patrick V. Gurgel
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
- ProMetic Life Sciences, Montreal, Canada
| | - Lee‐Ann Jaykus
- Department of Food, Bioprocessing and Nutrition Science, North Carolina State University, Raleigh, North Carolina 27695
| | - Ruben G. Carbonell
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695
| |
Collapse
|
17
|
Cao T, Wang A, Liang X, Tang H, Auner GW, Salley SO, Ng. Patterned Immobilization of Antibodies in Mechanically Induced Cracks. J Phys Chem B 2008; 112:2727-33. [DOI: 10.1021/jp711070k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ting Cao
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Anfeng Wang
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Xuemei Liang
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Haiying Tang
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Gregory W. Auner
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Steven O. Salley
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| | - Ng
- Department of Chemical Engineering and Materials Science and Department of Electrical and Computer Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202
| |
Collapse
|
18
|
Cao T, Wang A, Liang X, Tang H, Auner GW, Salley SO, Ng KYS. Investigation of spacer length effect on immobilized Escherichia coli pili-antibody molecular recognition by AFM. Biotechnol Bioeng 2008; 98:1109-22. [PMID: 17514756 DOI: 10.1002/bit.21503] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The immobilization of antibodies to sensor surfaces is critical in biochemical sensor development. In this study, Poly(ethylene glycol) (PEG) and Jeffamine spacers were employed to tether Escherichia coli K99 pilus antibody to silicon wafer surfaces for the purpose of improving the orientation of antibody as well as reducing the steric hindrance. To illustrate the effect of spacer length, a variety of linear polymers were used to covalently attach the antibodies to silicon surfaces. Atomic Force Microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) were used to characterize the surface morphology and chemical composition at each reaction step. The effect of spacer length in improving the specificity of immobilized antibody was investigated by attaching E. coli on the end of an AFM tip. The distribution of unbinding force and rupture distance from the force-distance curves obtained by AFM showed that the introduction of PEG spacer facilitates bacterial recognition which can improve the incidence of interactions by up to 90%. J600 proved to be the most effective spacer overcoming the steric hindrance seen with direct immobilization of antibody. In addition, the force spectroscopy reveals the elementary force quantum of E. coli-antibody to be 0.3 nN.
Collapse
Affiliation(s)
- Ting Cao
- Department of Chemical Engineering and Materials Science, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Michigan 48202, USA
| | | | | | | | | | | | | |
Collapse
|
19
|
|
20
|
Chen WT, Ladisch MR, Geng T, Bhunia AK. Membrane for selective capture of the microbial pathogenListeria monocytogenes. AIChE J 2005. [DOI: 10.1002/aic.10567] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
21
|
Salchert K, Gouzy MF, Glorius M, Kühn A, Nitschke M, Werner C. Immobilization of an anticoagulant benzamidine derivative: effect of spacer arms and carrier hydrophobicity on thrombin binding. Acta Biomater 2005; 1:441-9. [PMID: 16701825 DOI: 10.1016/j.actbio.2005.04.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2004] [Revised: 03/02/2005] [Accepted: 04/07/2005] [Indexed: 11/29/2022]
Abstract
Prevention of blood coagulation is very often a prerequisite for successful medical devices. For that purpose, passivation of the key coagulation enzyme thrombin through the derivatization of the material's surface with an amidine-based molecule has been found to be promising. To further enhance the efficiency of this approach, thin layers of maleic anhydride copolymers offering different physico-chemical characteristics were tethered with carboxyl terminated polyethylene glycol to covalently immobilize a benzamidine-type derivative. The free carboxyl surface groups produced by the attachment of polyethylene glycol (PEG) were quantified by Ag(+) labeling and subsequent XPS detection. The film thickness as well as the carboxyl group content were found to be clearly dependent on the copolymer hydrophobicity and the nature of the PEG molecule. For the assessment of the anchorage of the thrombin to the benzamidine-derivative functionalized surfaces, the substrates were immersed in a buffered thrombin solution and the enzyme adsorption was studied using immunostaining/confocal laser scanning microscopy. Higher degrees of thrombin binding were observed for substrates configured with the hydrophilic compared to the more hydrophobic copolymer. Moreover, surface-bound spacers based on alpha,omega-heterobifunctional PEG amino acids (alphaAm,omegaAc-PEG) also enhanced the benzamidine surface density in comparison to homofunctional PEG diacids (alphaAc,omegaAc-PEG) because of a lower degree of carboxyl inactivation due to PEG 'bridging'. Altogether, the choice of copolymer coatings and the type of PEG spacers were demonstrated to enhance the efficiency of the thrombin scavenging by the covalently immobilized coagulation inhibitor.
Collapse
Affiliation(s)
- Katrin Salchert
- Department of Biomaterials, Leibniz Institute of Polymer Research Dresden eV and the Max Bergmann Center of Biomaterials Dresden, Germany
| | | | | | | | | | | |
Collapse
|
22
|
Tozzi C, Salomone A, Giraudi G, Anfossi L, Baggiani C, Giovannoli C. Increased sensitivity of autoantibody determination by coupled-particle light-scattering assay by poly(ethylene glycols)-modified beads. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2004.01.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
23
|
|
24
|
Yakovleva J, Davidsson R, Lobanova A, Bengtsson M, Eremin S, Laurell T, Emnéus J. Microfluidic enzyme immunoassay using silicon microchip with immobilized antibodies and chemiluminescence detection. Anal Chem 2002; 74:2994-3004. [PMID: 12141657 DOI: 10.1021/ac015645b] [Citation(s) in RCA: 275] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Silicon microchips with immobilized antibodies were used to develop microfluidic enzyme immunoassays using chemiluminescence detection and horseradish peroxidase (HRP) as the enzyme label. Polyclonal anti-atrazine antibodies were coupled to the silicon microchip surface with an overall dimension of 13.1 x 3.2 mm, comprising 42 porous flow channels of 235-microm depth and 25-microm width. Different immobilization protocols based on covalent or noncovalent modification of the silica surface with 3-aminopropyltriethoxysilane (APTES) or 3-glycidoxypropyltrimethoxysilane (GOPS), linear polyethylenimine (LPEI, MW 750,000), or branched polyethylenimine (BPEI, MW 25,000), followed by adsorption or covalent attachment of the antibody, were evaluated to reach the best reusability, stability, and sensitivity of the microfluidic enzyme immunoassay (microFEIA). Adsorption of antibodies on a LPEI-modified silica surface and covalent attachment to physically adsorbed BPEI lead to unstable antibody coatings. Covalent coupling of antibodies via glutaraldehyde (GA) to three different functionalized silica surfaces (APTES-GA, LPEI-GA, and GOPS-BPEI-GA) resulted in antibody coatings that could be completely regenerated using 0.4 M glycine/HCl, pH 2.2. The buffer composition was shown to have a dramatic effect on the assay stability, where the commonly used phosphate buffer saline was proved to be the least suitable choice. The best long-term stability was obtained for the LPEI-GA surface with no loss of antibody activity during one month. The detection limits in the microFEIA for the three different immuno surfaces were 45, 3.8, and 0.80 ng/L (209, 17.7, and 3.7 pM) for APTES-GA, LPEI-GA, and GOPS-BPEI-GA, respectively.
Collapse
Affiliation(s)
- Julia Yakovleva
- Department of Chemistry, M.V. Lomonosov, Moscow State University, Russia
| | | | | | | | | | | | | |
Collapse
|
25
|
Abstract
Some of the problems associated with packed bed chromatography can be overcome by using synthetic macroporous and microporous membranes as chromatographic media. This paper reviews the current state of development in the area of membrane chromatographic separation of proteins. The transport phenomenon of membrane chromatography is briefly discussed and work done in this area is reviewed. The various separation chemistries which have been utilised for protein separation, along with different applications, are also reviewed. The technical challenges facing membrane chromatography are highlighted and the scope for future work is discussed.
Collapse
Affiliation(s)
- Raja Ghosh
- Department of Engineering Science, University of Oxford, UK.
| |
Collapse
|
26
|
Yang H, Viera C, Fischer J, Etzel MR. Purification of a Large Protein Using Ion-Exchange Membranes. Ind Eng Chem Res 2002. [DOI: 10.1021/ie010585l] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
27
|
Guiver MD, Zhang H, Robertson GP, Dai Y. Modified polysulfones. III. Synthesis and characterization of polysulfone aldehydes for reactive membrane materials. ACTA ACUST UNITED AC 2001. [DOI: 10.1002/1099-0518(20010301)39:5<675::aid-pola1039>3.0.co;2-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
28
|
Weimer BC, Walsh MK, Wang X. Influence of a poly-ethylene glycol spacer on antigen capture by immobilized antibodies. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2000; 45:211-9. [PMID: 10989137 DOI: 10.1016/s0165-022x(00)00114-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The use of spacers to distance an immobilized antibody from the surface of a support matrix introduces flexibility, which can reduce steric interferences between antibodies leading to a higher antigen capture efficiency. In this paper we investigated the use of a spacer molecule, poly-ethylene glycol (PEG), between the matrix surface and antibodies for the capture of Bacillus globigii, E. coli O157:H7, and ovalbumin. The antigen capture efficiency was determined using a surface ELISA method. Antibodies against the antigens were covalently immobilized either directly or via PEG to glass surfaces using a one-step EDC reaction. The amount of antibody immobilized was determined before blocking the nonspecific binding sites with bovine serum albumin. Antibodies immobilized via a PEG spacer showed a higher capture efficiency compared to direct immobilization, which was more pronounced with large antigens. Antibodies immobilized on glass supports were stable at 65 degrees C for at least 80 min, and the capture efficiency increased with heating at 65 degrees C for 20 min.
Collapse
Affiliation(s)
- B C Weimer
- Department of Nutrition and Food Sciences, Utah State University, Logan, UT 84322, USA.
| | | | | |
Collapse
|