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Islam N, Gurgel PV, Rojas OJ, Carbonell RG. Use of a Branched Linker for Enhanced Biosensing Properties in IgG Detection from Mixed Chinese Hamster Ovary Cell Cultures. Bioconjug Chem 2019; 30:815-825. [PMID: 30653289 DOI: 10.1021/acs.bioconjchem.8b00918] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Tris(2-aminoethyl)-amine (TREN), a branched amine, was coupled to planar surfaces of alkanethiol self-assembled monolayers (SAMs) to increase the grafting density of IgG-binding peptide (HWRGWV or HWRGWVG) on gold surfaces. One of the three primary amine pendant groups of TREN anchors onto the SAM, while the other two are available for grafting with the C-termini of the peptide. The ellipsometric peptide density on the SAM-branched amine was 1.24 molecules nm-2. The surfaces carrying the peptides were investigated via surface plasmon resonance (SPR) to quantify the adsorption of IgG and showed maximum binding capacity, Qm of 4.45 mg m-2, and dissociation constant, Kd of 8.7 × 10-7 M. Real-time dynamic adsorption data was used to determine adsorption rate constants, ka values, and the values were dependent on IgG concentration. IgG binding from complex mixtures of Chinese hamster ovary supernatant (CHO) was investigated and regeneration studies were carried out. Compared to the unbranched amine-based surfaces, the branched amines increased the overall sensitivity and selectivity for IgG adsorption from complex mixtures. Regeneration of the branched amine-based surfaces was achieved with 0.1 M NaOH, with less than 10% decline in peptide activity after 12 cycles of regeneration-binding.
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Affiliation(s)
- Nafisa Islam
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States.,Department of Chemical Engineering , Bangladesh University of Engineering and Technology , Dhaka 1000 , Bangladesh
| | - Patrick V Gurgel
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States.,Prometic Bioseparations , Cambridgeshire , CB23 7AJ , United Kingdom
| | - Orlando J Rojas
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States.,Department of Bioproducts and Biosystems, School of Chemical Engineering , Aalto University , Espoo , 00076 , Finland
| | - Ruben G Carbonell
- Department of Chemical and Biomolecular Engineering , North Carolina State University , Raleigh , North Carolina 27695-7905 , United States.,Biomanufacturing Training and Education (BTEC) , North Carolina State University , Raleigh , North Carolina 27606 , United States
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Vala M, Jordan LR, Warrington AE, Maher LJ, Rodriguez M, Wittenberg NJ, Oh SH. Surface Plasmon Resonance Sensing on Naturally Derived Membranes: A Remyelination-Promoting Human Antibody Binds Myelin with Extraordinary Affinity. Anal Chem 2018; 90:12567-12573. [DOI: 10.1021/acs.analchem.8b02664] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Milan Vala
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Luke R. Jordan
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Arthur E. Warrington
- Departments of Neurology and Immunology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - L. James Maher
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Moses Rodriguez
- Departments of Neurology and Immunology, Mayo Clinic, Rochester, Minnesota 55905, United States
| | - Nathan J. Wittenberg
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Sang-Hyun Oh
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
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Chen X, Wang C, Yao Y, Wang C. Plasmonic Vertically Coupled Complementary Antennas for Dual-Mode Infrared Molecule Sensing. ACS NANO 2017; 11:8034-8046. [PMID: 28693314 DOI: 10.1021/acsnano.7b02687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Here we report an infrared plasmonic nanosensor for label-free, sensitive, specific, and quantitative identification of nanometer-sized molecules. The device design is based on vertically coupled complementary antennas (VCCAs) with densely patterned hot-spots. The elevated metallic nanobars and complementary nanoslits in the substrate strongly couple at vertical nanogaps between them, resulting in dual-mode sensing dependent on the light polarization parallel or perpendicular to the nanobars. We demonstrate experimentally that a monolayer of octadecanethiol (ODT) molecules (thickness 2.5 nm) leads to significant antenna resonance wavelength shift over 136 nm in the parallel mode, corresponding to 7.5 nm for each carbon atom in the molecular chain or 54 nm for each nanometer in analyte thickness. Additionally, all four characteristic vibrational fingerprint signals, including the weak CH3 modes, are clearly delineated experimentally in both sensing modes. Such a dual-mode sensing with a broad wavelength design range (2.5 to 4.5 μm) is potentially useful for multianalyte detection. Additionally, we create a mathematical algorithm to design gold nanoparticles on VCCA sensors in simulation with their morphologies statistically identical to those in experiments and systematically investigate the impact of the nanoparticle morphology on the nanosensor performance. The nanoparticles form dense hot-spots, promote molecular adsorption, enhance near-field intensity 103 to 104 times, and improve ODT refractometric and fingerprint sensitivities. Our VCCA sensor structure offers a great design flexibility, dual-mode operation, and high detection sensitivity, making it feasible for broad applications from biomarker detection to environment monitoring and energy harvesting.
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Affiliation(s)
- Xiahui Chen
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Chu Wang
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Yu Yao
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
| | - Chao Wang
- School of Electrical, Computer and Energy Engineering, ‡The Center for Photonics Innovation, and §Biodesign Center for Molecular Design & Biomimetics, Arizona State University , Tempe, Arizona 85287, United States
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Raegen AN, Reiter K, Dion A, Clarke AJ, Lipkowski J, Dutcher JR. Advances in Surface Plasmon Resonance Imaging Enable Quantitative Tracking of Nanoscale Changes in Thickness and Roughness. Anal Chem 2014; 86:3346-54. [DOI: 10.1021/ac4034664] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adam N. Raegen
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Kyle Reiter
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Alexander Dion
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Anthony J. Clarke
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - Jacek Lipkowski
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
| | - John R. Dutcher
- Department of Physics, ‡Department of Molecular
and Cellular Biology, and §Department of
Chemistry, University of Guelph, Guelph, ON, Canada N1G 2W1
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Zhang J, Sun Y, Xu B, Zhang H, Gao Y, Zhang H, Song D. A novel surface plasmon resonance biosensor based on graphene oxide decorated with gold nanorod–antibody conjugates for determination of transferrin. Biosens Bioelectron 2013; 45:230-6. [DOI: 10.1016/j.bios.2013.02.008] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/06/2013] [Accepted: 02/06/2013] [Indexed: 11/30/2022]
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Mikelis C, Lamprou M, Koutsioumpa M, Koutsioubas AG, Spyranti Z, Zompra AA, Spiliopoulos N, Vradis AA, Katsoris P, Spyroulias GA, Cordopatis P, Courty J, Papadimitriou E. A peptide corresponding to the C-terminal region of pleiotrophin inhibits angiogenesis in vivo and in vitro. J Cell Biochem 2011; 112:1532-43. [PMID: 21344482 DOI: 10.1002/jcb.23066] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Pleiotrophin (PTN) is a heparin-binding growth factor that plays a significant role in tumor growth and angiogenesis. We have previously shown that in order for PTN to induce migration of endothelial cells, binding to both α(ν) β(3) integrin and its receptor protein tyrosine phosphatase beta/zeta (RPTPβ/ζ) is required. In the present study we show that a synthetic peptide corresponding to the last 25 amino acids of the C-terminal region of PTN (PTN(112-136) ) inhibited angiogenesis in the in vivo chicken embryo chorioallantoic membrane (CAM) assay and PTN-induced migration and tube formation of human endothelial cells in vitro. PTN(112-136) inhibited binding of PTN to α(ν) β(3) integrin, and as shown by surface plasmon resonance (SPR) measurements, specifically interacted with the specificity loop of the extracellular domain of β(3) . Moreover, it abolished PTN-induced FAK Y397 phosphorylation, similarly to the effect of a neutralizing α(ν) β(3) -selective antibody. PTN(112-136) did not affect binding of PTN to RPTPβ/ζ in endothelial cells and induced β(3) Y773 phosphorylation and ERK1/2 activation to a similar extent with PTN. This effect was inhibited by down-regulation of RPTPβ/ζ by siRNA or by c-src inhibition, suggesting that PTN(112-136) may interact with RPTPβ/ζ. NMR spectroscopy studies showed that PTN(112-136) was characterized by conformational flexibility and absence of any element of secondary structure at room temperature, although the biologically active peptide segment 123-132 may adopt a defined structure at lower temperature. Collectively, our data suggest that although PTN(112-136) induces some of the signaling pathways triggered by PTN, it inhibits PTN-induced angiogenic activities through inhibition of PTN binding to α(ν) β(3) integrin.
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Affiliation(s)
- Constantinos Mikelis
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Patras, Patras 26504, Greece
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