1
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Ryu JJ, Jang CH. A liquid crystal-based biosensor for sensitive detection of tumor necrosis factor-alpha. Mikrochim Acta 2023; 191:55. [PMID: 38153588 DOI: 10.1007/s00604-023-06125-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 11/26/2023] [Indexed: 12/29/2023]
Abstract
Tumor necrosis factor-alpha (TNF-α) is a cytokine secreted by the macrophages and Th1 cells of the immune system in response to inflammation. Given its significance as a biomarker with elevated levels in physiological fluids in various conditions, there is an increasing demand for a simple and accurate TNF-α detection strategy. In this article, we present a liquid crystal (LC)-based biosensor developed for sensitive TNF-α detection. The biosensor operates as follows: TNF-α and detection antibodies (DAbs) form complexes during preincubation. These complexes then bind with the surface-immobilized capture antibodies (CAbs), facilitating the antigen-antibody reaction between the CAbs and the TNF-α/DAb complexes. This target recognition interaction alters the surface topography, disrupting the vertical orientation of LCs produced by dimethyloctadecyl[3-(trimethoxysilyl)-propyl]ammonium chloride. The orientational change in the LCs can be easily visualized with a polarized optical microscope, resulting in brighter images as TNF-α levels rise. Our results demonstrated a linear range of 5.00-500 pg/mL, with a limit of detection and limit of quantification being 1.08 and 3.56 pg/mL, respectively. Recovery experiments on diluted saliva samples produced reasonable results, with TNF-α recoveries ranging from 97.1% ± 2.58% to 107% ± 5.95%.
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Affiliation(s)
- Je-Jin Ryu
- Department of Chemistry, Gachon University, Seongnam-daero 1342, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do, 13120, Republic of Korea
| | - Chang-Hyun Jang
- Department of Chemistry, Gachon University, Seongnam-daero 1342, Sujeong-Gu, Seongnam-Si, Gyeonggi-Do, 13120, Republic of Korea.
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2
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Method of kinetic characterization of immunoreagents for development of express high-sensitive assays for detection of ochratoxin A and heart fatty acids binding protein. MethodsX 2022; 9:101911. [DOI: 10.1016/j.mex.2022.101911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 10/30/2022] [Indexed: 11/10/2022] Open
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3
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Egghe T, Ghobeira R, Esbah Tabaei PS, Morent R, Hoogenboom R, De Geyter N. Silanization of Plasma-Activated Hexamethyldisiloxane-Based Plasma Polymers for Substrate-Independent Deposition of Coatings with Controlled Surface Chemistry. ACS APPLIED MATERIALS & INTERFACES 2022; 14:4620-4636. [PMID: 35014795 DOI: 10.1021/acsami.1c18223] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Plasma polymerization has emerged as an appealing technique for surface modification because of its advantages over a variety of conventional techniques, including ease-of-use and the possibility to modify nearly any substrate. One of the main challenges of plasma polymer-based surface modification, however, is having control over the coating chemistry, as plasma deposition generates a diversity of chemical structures. Therefore, this study presents an alternative plasma-based method for the fabrication of coatings that contain selective functionalities. In a first step, hexamethyldisiloxane (HMDSO) plasma polymerization is performed in a medium-pressure dielectric barrier discharge (DBD) to deposit polydimethylsiloxane (PDMS)-like coatings. In a second step, this coating is exposed to an air plasma in a similar DBD setup to introduce silanol groups on the surface. These groups are used in a third and final step as anchoring points for grafting of (3-aminopropyl)triethoxysilane (APTES) and (3-bromopropyl)trichlorosilane (BrPTCS) to selectively introduce amino or bromo groups, respectively. X-ray photoelectron spectroscopy (XPS) and water contact angle (WCA) measurements indicated that the first two steps were successful. Moreover, the coating could be synthesized on three different surfaces, namely, glass, ultrahigh-molecular-weight polyethylene, and polytetrafluoroethylene, indicating the wide applicability of the developed procedure. Afterward, XPS also proved that the APTES and BrPTCS grafting resulted in the formation of a coating containing primary amines and alkyl bromides, respectively, in combination with an organosilicon matrix containing silanol groups as remaining reactive groups, proving the successful synthesis of selective functional plasma-based coatings. The intermediate air-plasma-activation step was demonstrated to be necessary for successful and stable grafting of the final layer. In conclusion, this study established a general procedure for the development of coatings with selective functionality that can be applied on a wide variety of substrates for, e.g., biosensor applications, biomolecule, or polymer immobilization or for the synthesis of antibacterial coatings.
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Affiliation(s)
- Tim Egghe
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | - Rouba Ghobeira
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Parinaz Saadat Esbah Tabaei
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Rino Morent
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium
| | - Nathalie De Geyter
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
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4
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Sathish S, Shen AQ. Toward the Development of Rapid, Specific, and Sensitive Microfluidic Sensors: A Comprehensive Device Blueprint. JACS AU 2021; 1:1815-1833. [PMID: 34841402 PMCID: PMC8611667 DOI: 10.1021/jacsau.1c00318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Indexed: 05/04/2023]
Abstract
Recent advances in nano/microfluidics have led to the miniaturization of surface-based chemical and biochemical sensors, with applications ranging from environmental monitoring to disease diagnostics. These systems rely on the detection of analytes flowing in a liquid sample, by exploiting their innate nature to react with specific receptors immobilized on the microchannel walls. The efficiency of these systems is defined by the cumulative effect of analyte detection speed, sensitivity, and specificity. In this perspective, we provide a fresh outlook on the use of important parameters obtained from well-characterized analytical models, by connecting the mass transport and reaction limits with the experimentally attainable limits of analyte detection efficiency. Specifically, we breakdown when and how the operational (e.g., flow rates, channel geometries, mode of detection, etc.) and molecular (e.g., receptor affinity and functionality) variables can be tailored to enhance the analyte detection time, analytical specificity, and sensitivity of the system (i.e., limit of detection). Finally, we present a simple yet cohesive blueprint for the development of high-efficiency surface-based microfluidic sensors for rapid, sensitive, and specific detection of chemical and biochemical analytes, pertinent to a variety of applications.
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Affiliation(s)
- Shivani Sathish
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Amy Q. Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate
University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
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5
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Hwang C, Park N, Kim ES, Kim M, Kim SD, Park S, Kim NY, Kim JH. Ultra-fast and recyclable DNA biosensor for point-of-care detection of SARS-CoV-2 (COVID-19). Biosens Bioelectron 2021; 185:113177. [PMID: 33915435 PMCID: PMC7987504 DOI: 10.1016/j.bios.2021.113177] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/17/2021] [Accepted: 03/14/2021] [Indexed: 12/13/2022]
Abstract
Rapid diagnosis and case isolation are pivotal to controlling the current pandemic of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In this study, a label-free DNA capacitive biosensor for the detection of SARS-CoV-2 that demonstrates real-time, low-cost, and high-throughput screening of nucleic acid samples is presented. Our novel biosensor composed of the interdigitated platinum/titanium electrodes on the glass substrate can detect the hybridization of analyte DNA with probe DNA. The hybridization signals of specific DNA sequences were verified through exhaustive physicochemical analytical techniques such as Fourier transform infrared (FT-IR) spectrometry, contact-angle analysis, and capacitance-frequency measurements. For a single-step hybridized reaction, the fabricated kit exhibited significant sensitivity (capacitance change, ΔC = ~2 nF) in detecting the conserved region of the SARS-CoV-2 RNA-dependent RNA polymerase (RdRp) gene with high sensitivity of 0.843 nF/nM. In addition to capacitive measurements, this selective detection was confirmed by the fluorescence image and intensity from a SARS-CoV-2 gene labeled with a fluorescent dye. We also demonstrated that the kits are recyclable by surface ozone treatment using UV irradiation. Thus, these kits could potentially be applied to various types of label-free DNA, thereby acting as rapid, cost-effective biosensors for several diseases.
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Affiliation(s)
- Chuljin Hwang
- College of Pharmacy, Ajou University, Suwon 16499, South Korea
| | - Nakkyun Park
- College of Pharmacy, Ajou University, Suwon 16499, South Korea
| | - Eun Seong Kim
- Electronic Engineering, Kwangwoon University, Seoul 01897, South Korea
| | - Miran Kim
- Ajou University School of Medicine, Suwon 16499, South Korea
| | - Su Dong Kim
- Graduate School of Clinical Pharmacy and Pharmaceutics, Ajou University, Suwon,16499, South Korea
| | - Sungjun Park
- Department of Electrical and Computer Engineering, Ajou University, Suwon 16499, South Korea.
| | - Nam Young Kim
- Electronic Engineering, Kwangwoon University, Seoul 01897, South Korea; Graduate School of Clinical Pharmacy and Pharmaceutics, Ajou University, Suwon,16499, South Korea.
| | - Joo Hee Kim
- College of Pharmacy, Ajou University, Suwon 16499, South Korea; Graduate School of Clinical Pharmacy and Pharmaceutics, Ajou University, Suwon,16499, South Korea.
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6
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Alsharif N, Uzarski JR, Lawton TJ, Brown KA. High-Throughput Multiobjective Optimization of Patterned Multifunctional Surfaces. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32069-32077. [PMID: 32551476 DOI: 10.1021/acsami.0c04202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The realization and optimization of multifunctional materials is difficult, especially when the functionalities are directly incompatible. For example, it is challenging to make surfaces both enzymatically active and water repellent, as these two properties are directly competitive because of the hydrophilic nature of the enzyme-laden surfaces. Patterning discrete domains of distinct functionalities can represent a path to multifunctionality, but the innumerable possible domain permutations present a major barrier to optimizing performance. Here, we develop a high-throughput approach for exploring patterned multifunctional surfaces that is inspired by the microtiter plate architecture. As a model system, patterned surfaces are realized with horseradish peroxidase-decorated domains amidst a background of hydrophobic fluorinated self-assembled monolayers. In experiments exploring effects of pattern geometry, the measured enzyme activity is dependent only on the surface coverage. In contrast, roll-off behavior strongly depends on the parameters of the pattern geometry. Importantly, this finding enables the precise tailoring of distinct wetting behavior of the surfaces in a manner that is independent of their enzymatic activity. The high-throughput nature of the platform facilitates multiobjective optimization of surface functionalities in a general and flexible manner.
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Affiliation(s)
- Nourin Alsharif
- Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, United States
| | - Joshua R Uzarski
- Soldier Protection and Survivability Directorate, US Army Combat Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - Timothy J Lawton
- Soldier Protection and Survivability Directorate, US Army Combat Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - Keith A Brown
- Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, United States
- Physics Department and Division of Materials Science and Engineering, Boston University, Boston, Massachusetts 02215, United States
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7
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Lu N, Sticker D, Kretschmann A, Petersen NJ, Kutter JP. A thiol-ene microfluidic device enabling continuous enzymatic digestion and electrophoretic separation as front-end to mass spectrometric peptide analysis. Anal Bioanal Chem 2020; 412:3559-3571. [DOI: 10.1007/s00216-020-02609-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 03/13/2020] [Accepted: 03/18/2020] [Indexed: 02/07/2023]
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8
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Liu J, Zhang H, Xue D, Ahmad AU, Xia X, Liu Y, Huang H, Guo W, Liang H. An effective hydroxylation route for a highly sensitive glucose sensor using APTES/GOx functionalized AlGaN/GaN high electron mobility transistor. RSC Adv 2020; 10:11393-11399. [PMID: 35495354 PMCID: PMC9050454 DOI: 10.1039/c9ra09446f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 03/05/2020] [Indexed: 11/21/2022] Open
Abstract
A highly sensitive glucose sensor based on AlGaN/GaN high electron mobility transistor (HEMT) has been fabricated. The hydroxyl groups on the GaN surface were achieved by the decomposition of hydrogen peroxide solution (H2O2) under UV irradiation for the production of hydroxyl radicals. The self-assembled monolayers (SAMs) of 3-aminopropyltriethoxysilane (APTES) with terminal amino groups formed on the hydroxylation surface were used as substrates for glucose oxidase (GOx) immobilization. The chemical groups on the GaN surface after hydroxylation were confirmed by X-ray photoelectron spectroscopy. From the analysis of current signals, the biosensor constructed with APTES/GOx exhibited good current response to glucose over a linear range from 10 to 100 µM with a sensitivity of 3.15 × 104 µA mM−1 cm−2 and a detection limit of 10 nM. Meanwhile, the anticipated idea about the hydroxylation of GaN surface, can be an efficient approach for the design of AlGaN/GaN HEMT based biosensors in the future. A highly sensitive glucose sensor based on AlGaN/GaN high electron mobility transistor (HEMT) has been fabricated.![]()
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Affiliation(s)
- Jun Liu
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Heqiu Zhang
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Dongyang Xue
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Aqrab Ul Ahmad
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Xiaochuan Xia
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Yang Liu
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
| | - Huishi Huang
- Jiangsu Xinguanglian Technology Co., Ltd Wuxi Jiangsu P. R. China 214192
| | - Wenping Guo
- Shandong Novoshine Co., Ltd Weifang Shandong P. R. China 261000
| | - Hongwei Liang
- School of Microelectronics, Dalian University of Technology Dalian P. R. China 116024
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9
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Hänisch J, Hinrichs K, Rappich J. Surface Functionalization toward Biosensing via Free-Standing Si-OH Bonds on Nonoxidized Silicon Surfaces. ACS APPLIED MATERIALS & INTERFACES 2019; 11:31434-31440. [PMID: 31180638 DOI: 10.1021/acsami.9b03583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Usually hydroxyl groups present on top of oxidized silicon served as binding centers for a silanization reaction toward surface functionalization. In this study, we developed a novel surface functionalization strategy where hydroxyl functionalization on nonoxidized silicon surfaces are obtained. These surfaces were stable for several weeks even in ambient air at room temperature. This high stability indicates a strong spatial isolation of the hydroxyl groups because they keenly tend to undergo a condensation reaction, forming silicon oxide. To prove the applicability of the obtained hydroxylated silicon surface, we further modified the hydroxyl groups with a commonly used silane molecule, (3-aminopropyl)triethoxysilane (APTES). The functional amino groups of the APTES layer bonded to the surface were subsequently altered by N-maleoyl-β-alanin to generate a surface highly specific for the immobilization of thiol-containing biomolecules (like thiolated single-stranded DNA or cysteine-tagged proteins). All modification steps have been investigated by IR spectroscopic ellipsometry measurements.
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Affiliation(s)
- J Hänisch
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Institut für Silizium-Photovoltaik , Kekuléstraße 5 , 12489 Berlin , Germany
| | - K Hinrichs
- Leibniz-Institut für Analytische Wissenschaften (ISAS) eV , Schwarzschildstraße 8 , 12489 Berlin , Germany
| | - J Rappich
- Helmholtz-Zentrum Berlin für Materialien und Energie GmbH , Institut für Silizium-Photovoltaik , Kekuléstraße 5 , 12489 Berlin , Germany
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10
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Loading the dice: The orientation of virus-like particles adsorbed on titanate assisted organosilanized surfaces. Biointerphases 2019; 14:011001. [PMID: 30691269 DOI: 10.1116/1.5077010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The organization of virus-like particles (VLPs) on surfaces is a relevant matter for both fundamental and biomedical sciences. In this work, the authors have tailored surfaces with different surface tension components aiming at finding a relationship with the affinity of the different geometric/surface features of icosahedral P22 VLPs. The surfaces have been prepared by titanate assisted organosilanization with glycidyloxy, amino, and perfluoro silanes. Vibrational and photoelectron spectroscopies have allowed identifying the different functional groups of the organosilanes on the surfaces. Atomic force microscopy (AFM) showed that, irrespective of the organosilane used, the final root mean square roughness remains below 1 nm. Contact angle analyses confirm the effective formation of a set of surface chemistries exhibiting different balance among surface tension components. The study of the adsorption of P22 VLPs has involved the analysis of the dynamics of virus immobilization by fluorescence microscopy and the interpretation of the final VLP orientation by AFM. These analyses give rise to statistical distributions pointing to a higher affinity of VLPs toward perfluorinated surfaces, with a dominant fivefold conformation on this hydrophobic surface, but threefold and twofold symmetries dominating on hydrophilic surfaces. These results can be explained in terms of a reinforced hydrophobic interaction between the perfluorinated surface and the dominating hydrophobic residues present at the P22 pentons.
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11
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Badv M, Imani SM, Weitz JI, Didar TF. Lubricant-Infused Surfaces with Built-In Functional Biomolecules Exhibit Simultaneous Repellency and Tunable Cell Adhesion. ACS NANO 2018; 12:10890-10902. [PMID: 30352507 DOI: 10.1021/acsnano.8b03938] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Lubricant-infused omniphobic surfaces have exhibited outstanding effectiveness in inhibiting nonspecific adhesion and attenuating superimposed clot formation compared with other coated surfaces. However, such surfaces blindly thwart adhesion, which is troublesome for applications that rely on targeted adhesion. Here we introduce a new class of lubricant-infused surfaces that offer tunable bioactivity together with omniphobic properties by integrating biofunctional domains into the lubricant-infused layer. These novel surfaces promote targeted binding of desired species while simultaneously preventing nonspecific adhesion. To develop these surfaces, mixed self-assembled monolayers (SAMs) of aminosilanes and fluorosilanes were generated. Aminosilanes were utilized as coupling molecules for immobilizing capture ligands, and nonspecific adhesion of cells and proteins was prevented by infiltrating the fluorosilane molecules with a thin layer of a biocompatible fluorocarbon-based lubricant, thus generating biofunctional lubricant-infused surfaces. This method yields surfaces that (a) exhibit highly tunable binding of anti-CD34 and anti-CD144 antibodies and adhesion of endothelial cells, while repelling nonspecific adhesion of undesirable proteins and cells not only in buffer but also in human plasma or human whole blood, and (b) attenuate blood clot formation. Therefore, this straightforward and simple method creates biofunctional, nonsticky surfaces that can be used to optimize the performance of devices such as biomedical implants, extracorporeal circuits, and biosensors.
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Affiliation(s)
- Maryam Badv
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
| | - Sara M Imani
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
| | - Jeffrey I Weitz
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Thrombosis & Atherosclerosis Research Institute (TaARI) , Hamilton , Ontario L8S 4L7 , Canada
| | - Tohid F Didar
- School of Biomedical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Department of Mechanical Engineering , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
- Institute for Infectious Disease Research (IIDR) , McMaster University , Hamilton , Ontario L8S 4L7 , Canada
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12
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Evaluation of the activity of β-glucosidase immobilized on polydimethylsiloxane (PDMS) with a microfluidic flow injection analyzer with embedded optical fibers. Talanta 2018; 185:53-60. [DOI: 10.1016/j.talanta.2018.03.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/12/2018] [Accepted: 03/14/2018] [Indexed: 12/18/2022]
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13
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Hall JR, Baures PW. Inhibition of Tetrahydrofuran Hydrate Formation in the Presence of Polyol-Modified Glass Surfaces. ENERGY & FUELS : AN AMERICAN CHEMICAL SOCIETY JOURNAL 2017; 31:7816-7823. [PMID: 35444363 PMCID: PMC9017675 DOI: 10.1021/acs.energyfuels.7b00666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Glycerol was conjugated to glass test tube surfaces in four configurations by employing two different silane spacers, covalent attachment to glycerol at either the 1- or the 2-position, and with a succinic acid spacer. The resulting surfaces were tested for their ability to inhibit the nucleation of tetrahydrofuran hydrate (THF hydrate) in comparison with polyvinylpyrrolidone (PVP), a known polymeric inhibitor of THF hydrate formation. Contact angle measurements were used as an indication of surface modification throughout the glass derivatization steps. Of the four final surfaces modified with glycerol, only the coating with (3-aminopropyl)triethoxysilane (APTES) and glycerol coupled at the 1-position (leaving a free 1,2-diol) showed significant inhibition of the formation of THF hydrate. The corresponding N-[3-(trimethoxysilyl)propyl]-ethylenediamine (AEAPTMS) coating with glycerol coupled at the 1-position did not show a significant difference over the untreated test tubes. Attachment of glycerol at the 2-position yielded a coating with no benefit over the untreated test tubes regardless of the silane used, and a surface modified with APTES and succinic acid alone enhanced the formation of THF hydrate. The ability to inhibit THF hydrate formation using a polyol-modified surface is a first step in the development of a coating that, alone or in combination with known gas hydrate inhibitors, could be used to prevent gas hydrates from plugging pipelines in field applications.
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Affiliation(s)
- Jeffrey R. Hall
- Department of Chemistry & Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Paul W. Baures
- Department of Chemistry, Keene State College, 229 Main Street, Keene, New Hampshire 03435-2001, United States
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14
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Jönsson A, Svejdal RR, Bøgelund N, Nguyen TTTN, Flindt H, Kutter JP, Rand KD, Lafleur JP. Thiol-ene Monolithic Pepsin Microreactor with a 3D-Printed Interface for Efficient UPLC-MS Peptide Mapping Analyses. Anal Chem 2017; 89:4573-4580. [PMID: 28322047 DOI: 10.1021/acs.analchem.6b05103] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
To improve the sample handling, and reduce cost and preparation time, of peptide mapping LC-MS workflows in protein analytical research, we here investigate the possibility of replacing conventional enzymatic digestion methods with a polymer microfluidic chip based enzyme reactor. Off-stoichiometric thiol-ene is utilized as both bulk material and as a monolithic stationary phase for immobilization of the proteolytic enzyme pepsin. The digestion efficiency of the, thiol-ene based, immobilized enzyme reactor (IMER) is compared to that of a conventional, agarose packed bed, pepsin IMER column commonly used in LC-MS based protein analyses. The chip IMER is found to rival the conventional column in terms of digestion efficiency at comparable residence time and, using a 3D-printed interface, be directly interfaceable with LC-MS.
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Affiliation(s)
- Alexander Jönsson
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Rasmus R Svejdal
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Nanna Bøgelund
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Tam T T N Nguyen
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Henrik Flindt
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Jörg P Kutter
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Kasper D Rand
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
| | - Josiane P Lafleur
- Department of Pharmacy, Copenhagen University , Universitetsparken 2, Copenhagen E DK-2100, Denmark
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15
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Choi Y, Shin SH, Hong S, Kim Y. A combined top-down/bottom-up approach to structuring multi-sensing zones on a thin film and the application to SPR sensors. NANOTECHNOLOGY 2016; 27:345302. [PMID: 27418406 DOI: 10.1088/0957-4484/27/34/345302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The development of a thin film with well-defined metallic micro/nanostructures, diverse surface functionalities, and superior electronic/optical properties has been a great challenge to researchers seeking an efficient method for the detection of various analytes in chemical and biological sensing applications. Herein, we report a facile and effective approach to the fabrication of an ordered gold island pattern on a glass substrate with contrasted chemical functionalities, which can provide spatially separated sensing zones for multi-detection. In the proposed method, the combination between the micro/nano-imprint lithography and sequential self-assembly approaches exhibited synergistic effects that allowed well-defined structuring and easy surface functionalization in separated sensing zones. Via imprint lithography, the uniform gold islands/glass structure was successfully fabricated from a readily available gold-coated glass film. In addition, a sequential self-assembling strategy and specific chemical-substrate interactions, such as thiol-gold and silane-glass, enabled the surfaces of gold islands and exposed portions of the glass substrate with contrasting chemical functionalities-SH-functionalized gold islands and NH2-functionalized glass substrate. A proof-of-concept experiment for the multi-detection of heavy metal ions (Hg(2+) and Cu(2+)) in an aqueous media was also successfully conducted using the dual-functionalized gold islands/glass structure and surface plasmon resonance measurements. The SH groups on the gold islands and the NH2 groups on the glass substrate functioned as spatially separated and selective receptors for Hg(2+) and Cu(2+) ions, respectively. Therefore, both the detection and quantification of Hg(2+) and Cu(2+) ions could be achieved using a single sensing substrate.
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Affiliation(s)
- Youngbo Choi
- Department of Safety Engineering, Chungbuk National University, Chungbuk 28644, Korea
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Matos J, Soares A, Domingues I, Monteiro G, Gonçalves M. ORMOPLEXEs for gene therapy: In vitro and in vivo assays. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:546-53. [DOI: 10.1016/j.msec.2016.03.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 02/18/2016] [Accepted: 03/01/2016] [Indexed: 01/16/2023]
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17
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Surface Modification Chemistries of Materials Used in Diagnostic Platforms with Biomolecules. J CHEM-NY 2016. [DOI: 10.1155/2016/9241378] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Biomolecules including DNA, protein, and enzymes are of prime importance in biomedical field. There are several reports on the technologies for the detection of these biomolecules on various diagnostic platforms. It is important to note that the performance of the biosensor is highly dependent on the substrate material used and its meticulous modification for particular applications. Therefore, it is critical to understand the principles of a biosensor to identify the correct substrate material and its surface modification chemistry. The imperative surface modification for the attachment of biomolecules without losing their bioactivity is a key to sensitive detection. Therefore, finding of a modification method which gives minimum damage to the surface as well as biomolecule is highly inevitable. Different surface modification technologies are invented according to the type of a substrate used. Surface modification techniques of the materials used as platforms in the fabrication of biosensors are reviewed in this paper.
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Mahapatro A. Bio-functional nano-coatings on metallic biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:227-51. [DOI: 10.1016/j.msec.2015.05.018] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 03/20/2015] [Accepted: 05/07/2015] [Indexed: 11/28/2022]
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Evans E, Gabriel EFM, Benavidez TE, Tomazelli Coltro WK, Garcia CD. Modification of microfluidic paper-based devices with silica nanoparticles. Analyst 2014; 139:5560-7. [PMID: 25204446 PMCID: PMC4180781 DOI: 10.1039/c4an01147c] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
This paper describes a silica nanoparticle-modified microfluidic paper-based analytical device (μPAD) with improved color intensity and uniformity for three different enzymatic reactions with clinical relevance (lactate, glucose, and glutamate). The μPADs were produced on a Whatman grade 1 filter paper and using a CO2 laser engraver. Silica nanoparticles modified with 3-aminopropyltriethoxysilane were then added to the paper devices to facilitate the adsorption of selected enzymes and prevent the washing away effect that creates color gradients in the colorimetric measurements. According to the results herein described, the addition of silica nanoparticles yielded significant improvements in color intensity and uniformity. The resulting μPADs allowed for the detection of the three analytes in clinically relevant concentration ranges with limits of detection (LODs) of 0.63 mM, 0.50 mM, and 0.25 mM for lactate, glucose, and glutamate, respectively. An example of an analytical application has been demonstrated for the semi-quantitative detection of all three analytes in artificial urine. The results demonstrate the potential of silica nanoparticles to avoid the washing away effect and improve the color uniformity and intensity in colorimetric bioassays performed on μPADs.
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Affiliation(s)
- Elizabeth Evans
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, TX 78249, USA.
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Vashist SK, Lam E, Hrapovic S, Male KB, Luong JHT. Immobilization of Antibodies and Enzymes on 3-Aminopropyltriethoxysilane-Functionalized Bioanalytical Platforms for Biosensors and Diagnostics. Chem Rev 2014; 114:11083-130. [DOI: 10.1021/cr5000943] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sandeep Kumar Vashist
- HSG-IMIT - Institut für Mikro- und Informationstechnik, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
- Laboratory for MEMS Applications, Department of Microsystems Engineering - IMTEK, University of Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
| | - Edmond Lam
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | | | - Keith B. Male
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | - John H. T. Luong
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Department of Chemistry and Analytical, Biological Chemistry Research Facility (ABCRF), University College Cork, Cork, Ireland
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Potter-Baker KA, Nguyen JK, Kovach KM, Gitomer MM, Srail TW, Stewart WG, Skousen JL, Capadona JR. Development of Superoxide Dismutase Mimetic Surfaces to Reduce Accumulation of Reactive Oxygen Species for Neural Interfacing Applications. J Mater Chem B 2014; 2:2248-2258. [PMID: 25132966 PMCID: PMC4131700 DOI: 10.1039/c4tb00125g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite successful initial recording, neuroinflammatory-mediated oxidative stress products can contribute to microelectrode failure by a variety of mechanisms including: inducing microelectrode corrosion, degrading insulating/passivating materials, promoting blood-brain barrier breakdown, and directly damaging surrounding neurons. We have shown that a variety of anti-oxidant treatments can reduce intracortical microelectrode-mediated oxidative stress, and preserve neuronal viability. Unfortunately, short-term soluble delivery of anti-oxidant therapies may be unable to provide sustained therapeutic benefits due to low bio-availability and fast clearance rates. In order to develop a system to provide sustained neuroprotection, we investigated modifying the microelectrode surface with an anti-oxidative coating. For initial proof of concept, we chose the superoxide dismutase (SOD) mimetic Mn(III)tetrakis(4-benzoic acid)porphyrin (MnTBAP). Our system utilizes a composite coating of adsorbed and immobilized MnTBAP designed to provide an initial release followed by continued presentation of an immobilized layer of the antioxidant. Surface modification was confirmed by XPS and QCMB-D analysis. Antioxidant activity of composite surfaces was determined using a Riboflavin/NitroBlue Tetrazolium (RF/NBT) assay. Our results indicate that the hybrid modified surfaces provide several days of anti-oxidative activity. Additionally, in vitro studies with BV-2 microglia cells indicated a significant reduction of intracellular and extracellular reactive oxygen species when cultured on composite MnTBAP surfaces.
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Affiliation(s)
- Kelsey A. Potter-Baker
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
- Advanced Platform Technology Center, L. Stokes Cleveland VA Medical Center, 10701 East Boulevard Mail Stop 151 AW/APT, Cleveland, OH 44106
| | - Jessica K. Nguyen
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
- Advanced Platform Technology Center, L. Stokes Cleveland VA Medical Center, 10701 East Boulevard Mail Stop 151 AW/APT, Cleveland, OH 44106
| | - Kyle M. Kovach
- Advanced Platform Technology Center, L. Stokes Cleveland VA Medical Center, 10701 East Boulevard Mail Stop 151 AW/APT, Cleveland, OH 44106
| | - Martin M. Gitomer
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
| | - Tyler W. Srail
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
| | - Wade G. Stewart
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
| | - John L. Skousen
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
- Advanced Platform Technology Center, L. Stokes Cleveland VA Medical Center, 10701 East Boulevard Mail Stop 151 AW/APT, Cleveland, OH 44106
| | - Jeffrey R. Capadona
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr Drive, Wickenden Building, Cleveland, OH 44106
- Advanced Platform Technology Center, L. Stokes Cleveland VA Medical Center, 10701 East Boulevard Mail Stop 151 AW/APT, Cleveland, OH 44106
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Adiguzel Y, Kulah H. Studies on visual detection and surface modification testing of glass microfiber filter paper based biosensor. Biosens Bioelectron 2014; 54:27-34. [DOI: 10.1016/j.bios.2013.10.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 10/24/2013] [Accepted: 10/24/2013] [Indexed: 10/26/2022]
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Coating extracellular matrix proteins on a (3-aminopropyl)triethoxysilane-treated glass substrate for improved cell culture. Biotechniques 2014; 56:172-9. [PMID: 24724842 DOI: 10.2144/000114156] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 01/29/2014] [Indexed: 11/23/2022] Open
Abstract
We demonstrate that a (3-aminopropyl)triethoxysilane-treated glass surface is superior to an untreated glass surface for coating with extracellular matrix (ECM) proteins when used as a cell culture substrate to observe cell physiology and behavior. We found that MDCK cells cultured on untreated glass coated with ECM removed the coated ECM protein and secreted different ECM proteins. In contrast, the cells did not remove the coated ECM protein when seeded on (3-aminopropyl)triethoxysilane-treated (i.e., silanized) glass coated with ECM. Furthermore, the morphology and motility of cells grown on silanized glass differed from those grown on non-treated glass, even when both types of glass were initially coated with laminin. We also found that cells on silanized glass coated with laminin had higher motility than those on silanized glass coated with fibronectin. Based on our results, we suggest that silanized glass is a more suitable cell culture substrate than conventional non-treated glass when coated by ECM for observations of ECM effects on cell physiology.
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Didar TF, Bowey K, Almazan G, Tabrizian M. A miniaturized multipurpose platform for rapid, label-free, and simultaneous separation, patterning, and in vitro culture of primary and rare cells. Adv Healthc Mater 2014; 3:253-60. [PMID: 23949952 DOI: 10.1002/adhm.201300099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/10/2013] [Indexed: 11/09/2022]
Abstract
Given that current cell isolation techniques are expensive, time consuming, yield low isolation purities, and/or alter target cell properties, a versatile, cost effective, and easy-to-operate microchip with the capability to simultaneously separate, capture, pattern, and culture rare and primary cells in vitro is developed. The platform is based on target cell adhesion onto the micro-fabricated interfaces produced by microcontact printing of cell-specific antibodies. Results show over 95% separation efficiency in less than 10 min for the separation of oligodendrocyte progenitor cells (OPCs) and cardiomyocytes from rat brain and heart mixtures, respectively. Target cell attachment and single cell spreading can be precisely controlled on the basis of the designed patterns. Both cell types can maintain their biofunctionality. Indeed, isolated OPCs can proliferate and differentiate into mature oligodendrocytes, while isolated cardiomyocytes retain their contractile properties on the separation platform. Successful separation of two dissimilar cell types present in varying concentrations in their respective cell mixtures and the demonstration of their integrity after separation open new avenues for time and cost-effective sorting of various cell types using the developed miniaturized platform.
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Affiliation(s)
- Tohid Fatanat Didar
- Department of Biomedical Engineering, McGill University, Montréal, QC H3A 2B4, Canada
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Rejeeth C, Nag TC, Kannan S. Cisplatin-functionalized silica nanoparticles for cancer chemotherapy. Cancer Nanotechnol 2013; 4:127-136. [PMID: 26069508 PMCID: PMC4451868 DOI: 10.1007/s12645-013-0043-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 07/01/2013] [Indexed: 11/23/2022] Open
Abstract
Cisplatin is used to treat a variety of tumors, but dose-limiting toxicities or intrinsic and acquired resistance limit its application in many types of cancer including breast. Cisplatin was attached to silica nanoparticles using aminopropyltriethoxy silane as a linker molecule and characterized in terms of size, shape, as well as the dissolution of cisplatin from the silica surface. The primary particle diameter of the as received silica nanoparticles ranged from 20 to 90 nm. The results show that adverse effects on cell function, as evidenced by reduced metabolic activity measured by the MTT assay and increased membrane permeability observed using the live/dead stain, can be correlated with surface area of the silica. Cisplatin-functionalized silica nanoparticles with the highest surface area incited the greatest response, which was almost equivalent to that induced by free cisplatin. Moreover, if verified by further studies, would indicate that cisplatin was attached to silica nanoparticles might prove to be useful in site-specific drug delivery.
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Affiliation(s)
- Chandrababu Rejeeth
- Proteomics and Molecular Cell Physiology Lab, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, 641 046 TN India
| | - Tapas C Nag
- Sophisticated Analytical Instrument Facility for Electron Microscopy, Department of Anatomy, All India Institute of Medical Sciences, New Delhi, 110029 India
| | - Soundarapandian Kannan
- Proteomics and Molecular Cell Physiology Lab, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore, 641 046 TN India
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26
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Micro-spot with integrated pillars (MSIP) for detection of dengue virus NS1. Biomed Microdevices 2013; 15:959-71. [DOI: 10.1007/s10544-013-9787-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Sener G, Ozgur E, Rad AY, Uzun L, Say R, Denizli A. Rapid real-time detection of procalcitonin using a microcontact imprinted surface plasmon resonance biosensor. Analyst 2013; 138:6422-8. [DOI: 10.1039/c3an00958k] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Guha Thakurta S, Subramanian A. Fabrication of dense, uniform aminosilane monolayers: A platform for protein or ligand immobilization. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.08.049] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Sin EJ, Moon YS, Lee YK, Lim JO, Huh JS, Choi SY, Sohn YS. SURFACE MODIFICATION OF ALUMINUM OXIDE FOR BIOSENSING APPLICATION. BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS 2012. [DOI: 10.4015/s1016237212500093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The surface modification for immobilization of antibodies on the aluminum oxide surface was developed for biosensing application. The aluminum oxide has been received much attention since it has various advantages including low cost, hardness, resistance to organic solvents, and high capacitance. In addition, the aluminum oxide can prevent the leakage current in the electrical detection. For development of the protein anchorable surface, the aluminum oxide chip was treated with oxygen plasma and directly immersed in ethanol and toluene solution of 3-aminopropyltriethoxysilane (APTES). Next, this amine modified chip was immersed in the glutaraldehyde solution that contained sodium cyanoborohydride. Finally, the fluorescent materials, the Alexa 488, and the FITC conjugated anti-IgG were reacted to the aldehyde-modified surface. To verify the modified surface, the intensity of the fluorescence was measured and compared. The higher intensity of the fluorescence was observed when the APTES was dissolved in toluene rather than in ethanol. From the highest intensity of the fluorescence observed, the FITC conjugated anti-IgG was well immobilized on the modified surface of the aluminum oxide with APTES and glutaraldehyde. Thus, the proposed surface modification method can immobilize the proteins including antibodies, and can be applied for the various biological researches including biosensors and biochips.
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Affiliation(s)
- Eun Jung Sin
- Department of Biomedical Engineering, Catholic University of Daegu, Gyeongsan-si, Gyeongbuk 712-702, Republic of Korea
| | - Young-Soon Moon
- Department of Sensors and Display Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Yeon Kyung Lee
- Department of Biomedical Engineering, Catholic University of Daegu, Gyeongsan-si, Gyeongbuk 712-702, Republic of Korea
| | - Jeong-Ok Lim
- Biomedical Research Institute, Kyungpook National University School of Medicine, Daegu 700-721, Republic of Korea
| | - Jeung-Soo Huh
- School of Material Science and Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Sie-Young Choi
- Department of Sensors and Display Engineering, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Young-Soo Sohn
- Department of Biomedical Engineering, Catholic University of Daegu, Gyeongsan-si, Gyeongbuk 712-702, Republic of Korea
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Fabrication of a hydrophobic/hydrophilic hybrid-patterned microarray chip and its application to a cancer marker immunoassay. BIOCHIP JOURNAL 2012. [DOI: 10.1007/s13206-012-6102-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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31
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Cheang TY, Tang B, Xu AW, Chang GQ, Hu ZJ, He WL, Xing ZH, Xu JB, Wang M, Wang SM. Promising plasmid DNA vector based on APTES-modified silica nanoparticles. Int J Nanomedicine 2012; 7:1061-7. [PMID: 22403488 PMCID: PMC3292418 DOI: 10.2147/ijn.s28267] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Nanoparticles have an enormous potential for development in biomedical applications, such as gene or drug delivery. We developed and characterized aminopropyltriethoxysilane-functionalized silicon dioxide nanoparticles (APTES-SiNPs) for gene therapy. Lipofectamine® 2000, a commonly used agent, served as a contrast. We showed that APTES-SiNPs had a gene transfection efficiency almost equal to that of Lipofectamine 2000, but with lower cytotoxicity. Thus, these novel APTES-SiNPs can achieve highly efficient transfection of plasmid DNA, and to some extent reduce cytotoxicity, which might overcome the critical drawbacks in vivo of conventional carriers, such as viral vectors, organic polymers, and liposomes, and seem to be a promising nonviral gene therapy vector.
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Affiliation(s)
- Tuck-yun Cheang
- Department of Vascular Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Carta D, Villanova L, Costacurta S, Patelli A, Poli I, Vezzù S, Scopece P, Lisi F, Smith-Miles K, Hyndman RJ, Hill AJ, Falcaro P. Method for Optimizing Coating Properties Based on an Evolutionary Algorithm Approach. Anal Chem 2011; 83:6373-80. [DOI: 10.1021/ac201337e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Davide Carta
- Associazione CIVEN, Via delle Industrie 5, 30175 Venezia, Italy
- European Centre for Living Technology, Ca’ Minich, San Marco 2940, 30124 Venezia, Italy
| | - Laura Villanova
- Dipartimento di Scienze Statistiche, Università di Padova, Via Cesare Battisti 241, 35121 Padova, Italy
- School of Mathematical Sciences, Faculty of Science, Monash University, Building 28, Wellington Road, Clayton, Australia
| | | | | | - Irene Poli
- European Centre for Living Technology, Ca’ Minich, San Marco 2940, 30124 Venezia, Italy
- Dipartimento di Statistica, Università Ca’ Foscari di Venezia, San Giobbe, Cannaregio 873, 30121 Venice, Italy
| | - Simone Vezzù
- Associazione CIVEN, Via delle Industrie 5, 30175 Venezia, Italy
| | - Paolo Scopece
- Associazione CIVEN, Via delle Industrie 5, 30175 Venezia, Italy
| | - Fabio Lisi
- CSIRO, Materials Science & Engineering, Gate 5 Normanby Road, Clayton VIC 3168, Australia
| | - Kate Smith-Miles
- School of Mathematical Sciences, Faculty of Science, Monash University, Building 28, Wellington Road, Clayton, Australia
| | - Rob J. Hyndman
- Department of Econometrics and Business Statistics, Faculty of Business and Economics, Monash University, Building 11, Wellington Road, Clayton, Australia
| | - Anita J. Hill
- CSIRO, Materials Science & Engineering, Gate 5 Normanby Road, Clayton VIC 3168, Australia
| | - Paolo Falcaro
- Associazione CIVEN, Via delle Industrie 5, 30175 Venezia, Italy
- CSIRO, Materials Science & Engineering, Gate 5 Normanby Road, Clayton VIC 3168, Australia
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Blinka E, Loeffler K, Hu Y, Gopal A, Hoshino K, Lin K, Liu X, Ferrari M, Zhang JX. Enhanced microcontact printing of proteins on nanoporous silica surface. NANOTECHNOLOGY 2010; 21:415302. [PMID: 20834118 PMCID: PMC2944042 DOI: 10.1088/0957-4484/21/41/415302] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We demonstrate porous silica surface modification, combined with microcontact printing, as an effective method for enhanced protein patterning and adsorption on arbitrary surfaces. Compared to conventional chemical treatments, this approach offers scalability and long-term device stability without requiring complex chemical activation. Two chemical surface treatments using functionalization with the commonly used 3-aminopropyltriethoxysilane (APTES) and glutaraldehyde (GA) were compared with the nanoporous silica surface on the basis of protein adsorption. The deposited thickness and uniformity of porous silica films were evaluated for fluorescein isothiocyanate (FITC)-labeled rabbit immunoglobulin G (R-IgG) protein printed onto the substrates via patterned polydimethlysiloxane (PDMS) stamps. A more complete transfer of proteins was observed on porous silica substrates compared to chemically functionalized substrates. A comparison of different pore sizes (4-6 nm) and porous silica thicknesses (96-200 nm) indicates that porous silica with 4 nm diameter, 57% porosity and a thickness of 96 nm provided a suitable environment for complete transfer of R-IgG proteins. Both fluorescence microscopy and atomic force microscopy (AFM) were used for protein layer characterizations. A porous silica layer is biocompatible, providing a favorable transfer medium with minimal damage to the proteins. A patterned immunoassay microchip was developed to demonstrate the retained protein function after printing on nanoporous surfaces, which enables printable and robust immunoassay detection for point-of-care applications.
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Vong T, ter Maat J, van Beek TA, van Lagen B, Giesbers M, van Hest JCM, Zuilhof H. Site-specific immobilization of DNA in glass microchannels via photolithography. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:13952-13958. [PMID: 20560554 DOI: 10.1021/la901558n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
For the first time, a microchannel was photochemically patterned with a functional linker. This simple method was developed for the site-specific attachment of DNA via this linker onto silicon oxide surfaces (e.g., fused silica and borosilicate glass), both onto a flat surface and onto the inside of a fused silica microchannel. Sharp boundaries in the micrometer range between modified and unmodified zones were demonstrated by the attachment of fluorescently labeled DNA oligomers. Studies of repeated hybridization-dehybridization cycles revealed selective and reversible binding of cDNA strands at the explicit locations. On average, approximately 7 x 10(11) fluorescently labeled DNA molecules were hybridized per square centimeter. The modified surfaces were characterized with X-ray photoelectron spectroscopy, infrared microscopy, static contact angle measurements, confocal laser scanning microscopy, and fluorescence detection (to quantify the attachment of the fluorescently labeled DNA).
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Affiliation(s)
- Tuha Vong
- Laboratory of Organic Chemistry, Wageningen University, Dreijenplein 8, 6703 HB Wageningen, The Netherlands
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