1
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Peng K, Wang R, Zhou J. One-step fabrication of three-dimensional macropore copolymer-modified polycarbonate array by photo-crosslinking for protein immunoassay. RSC Adv 2023; 13:6936-6946. [PMID: 36865573 PMCID: PMC9973421 DOI: 10.1039/d3ra00696d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 02/23/2023] [Indexed: 03/02/2023] Open
Abstract
A photocross-linked copolymer was prepared, and could rapidly form a macropore structure in phosphate buffer solution (PBS) without the addition of porogen. The photo-crosslinking process contained the crosslinking of the copolymer itself and that with the polycarbonate substrate. The three-dimensional (3D) surface was achieved through one-step photo-crosslinking of the macropore structure. The macropore structure can be finely regulated by multiple dimensions, including monomer structure of the copolymer, PBS and copolymer concentration. Compared with the two-dimensional (2D) surface, the 3D surface has a controllable structure, a high loading capacity (59 μg cm-2) and immobilization efficiency (92%), and the effect of inhibiting the coffee ring for protein immobilization. Immunoassay results show that a 3D surface immobilized by IgG has high sensitivity (LOD value of 5 ng mL-1) and broader dynamic range (0.005-50 μg mL-1). This simple and structure-controllable method for preparing 3D surfaces modified by macropore polymer has great potential applications in the fields of biochips and biosensing.
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Affiliation(s)
- Kaimei Peng
- School of Chemistry and Chemical Engineering, Qiannan Normal University for Nationalities Duyun 558000 China.,Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong Province School of Biomedical Engineering, Sun Yat-sen University Guangzhou 510275 China
| | - Runping Wang
- School of Chemistry and Chemical Engineering, Qiannan Normal University for NationalitiesDuyun 558000China
| | - Jianhua Zhou
- Key Laboratory of Sensing Technology and Biomedical Instruments of Guangdong Province School of Biomedical Engineering, Sun Yat-sen University Guangzhou 510275 China
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2
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Yan J, Zhao C, Ma Y, Yang W. Covalently Attaching Hollow Silica Nanoparticles on a COC Surface for the Fabrication of a Three-Dimensional Protein Microarray. Biomacromolecules 2022; 23:2614-2623. [PMID: 35603741 DOI: 10.1021/acs.biomac.2c00354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Compared to traditional two-dimensional (2D) biochips, three-dimensional (3D) biochips exhibit the advantages of higher probe density and detection sensitivity due to their designable surface microstructure as well as enlarged surface area. In the study, we proposed an approach to prepare a 3D protein chip by deposition of a monolayer of functionalized hollow silica nanoparticles (HSNs) on an activated cyclic olefin copolymer (COC) substrate. First, the COC substrate was chemically modified through the photografting technique to tether poly[3-(trimethoxysilyl) propyl methacrylate] (PTMSPMA) brushes on it. Then, a monolayer of HSNs was deposited on the modified COC and covalently attached via a condensation reaction between the hydrolyzed pendant siloxane groups of PTMSPMA and the Si-OH groups of HSNs. The roughness of the COC substrate significantly increased to 50.3 nm after depositing a monolayer of HSNs (ranging from 100 to 700 nm), while it only caused a negligible reduction in the light transmittance of COC. The HSN-modified COC was further functionalized with epoxide groups by a silane coupling agent for binding proteins. Immunoglobulin G could be effectively immobilized on this substrate with the highest immobilization efficiency of 75.2% and a maximum immobilization density of 1.236 μg/cm2, while the highest immobilization efficiency on a 2D epoxide group-modified glass slide was only 57.4%. Moreover, immunoassay results confirmed a competitive limit of detection (LOD) (1.06 ng/mL) and a linear detection range (1-100 ng/mL) of the 3D protein chip. This facile and effective approach for fabricating nanoparticle-based 3D protein microarrays has great potential in the field of biorelated detection.
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3
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Pavlova E, Maslakova A, Prusakov K, Bagrov D. Optical sensors based on electrospun membranes – principles, applications, and prospects for chemistry and biology. NEW J CHEM 2022. [DOI: 10.1039/d2nj01821g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrospun membranes are promising substrates for receptor layer immobilization in optical sensors. Either colorimetric, luminescence, or Raman scattering signal can be used to detect the analyte.
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Affiliation(s)
- Elizaveta Pavlova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
- Federal Research Clinical Center of Physical–Chemical Medicine of the Federal Medical and Biological Agency of Russia, 1a Malaya Pirogovskaya Street, 119435, Moscow, Russian Federation
| | - Aitsana Maslakova
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
| | - Kirill Prusakov
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
- Federal Research Clinical Center of Physical–Chemical Medicine of the Federal Medical and Biological Agency of Russia, 1a Malaya Pirogovskaya Street, 119435, Moscow, Russian Federation
| | - Dmitry Bagrov
- Lomonosov Moscow State University, Faculty of Biology, Leninskie Gory 1-12, 119234, Moscow, Russian Federation
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4
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Yan J, Zhao C, Ma Y, Yang W. Three-dimensional protein microarrays fabricated on reactive microsphere modified COC substrates. J Mater Chem B 2021; 10:293-301. [PMID: 34913463 DOI: 10.1039/d1tb02238e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Fabrication of three-dimensional (3D) surface structures for the high density immobilization of biomolecules is an effective way to prepare highly sensitive biochips. In this work, a strategy to attach polymeric microspheres on a cyclic olefin copolymer (COC) substrate for the preparation of a 3D protein chip was developed. The COC surface was firstly functionalized by the photograft technique with epoxy groups, which were subsequently converted to amine groups. Then monodisperse poly(styrene-alt-maleic anhydride) (PSM) copolymer microspheres were prepared by self-stabilized precipitation polymerization and deposited as a single layer on a modified COC surface to form a 3D surface texture. The surface roughness of the COC support undergoes a significant increase from 1.4 nm to 37.1 nm after deposition of PSM microspheres with a size of 460 nm, and the modified COC still maintains a transmittance of more than 63% at the fluorescence excitation wavelengths (555 nm and 647 nm). The immobilization efficiency of immunoglobulin G (IgG) on the 3D surface reached 75.6% and the immobilization density was calculated to be 0.255 μg cm-2, at a probe protein concentration of 200 μg mL-1. The 3D protein microarray can be rapidly blocked by gaseous ethylenediamine within 10 minutes due to the high reactivity of anhydride groups in PSM microspheres. Immunoassay results show that the 3D protein microarray achieved specific identification of the target protein with a linear detection range from 6.25 ng mL-1 to 250 ng mL-1 (R2 > 0.99) and a limit of detection of 8.87 ng mL-1. This strategy offers a novel way to develop high performance polymer-based 3D protein chips.
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Affiliation(s)
- Jian Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Changwen Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China. .,Key Laboratory of Biomedical Materials of Natural Macromolecules, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China.,Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China. .,Key Laboratory of Biomedical Materials of Natural Macromolecules, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
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5
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Cheng C, Harpster MH, Oakey J. Convection-driven microfabricated hydrogels for rapid biosensing. Analyst 2020; 145:5981-5988. [PMID: 32820752 PMCID: PMC7819640 DOI: 10.1039/d0an01069c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A microscale biosensing platform using rehydration-mediated swelling of bio-functionalized hydrogel structures and rapid target analyte capture is described. Induced convective flow mitigates diffusion limited incubation times, enabling model assays to be completed in under three minutes. Assay design parameters have been evaluated, revealing fabrication criteria required to tune detection sensitivity.
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Affiliation(s)
- Cheng Cheng
- Department of Chemical Engineering, University of Wyoming, Laramie, WY 82070, USA.
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6
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7
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Jang SJ, Doshi T, Nerayo J, Caprio A, Alaie S, Auge J, Min JK, Mosadegh B, Dunham S. Microneedle Patterning of 3D Nonplanar Surfaces on Implantable Medical Devices Using Soft Lithography. MICROMACHINES 2019; 10:mi10100705. [PMID: 31623246 PMCID: PMC6843263 DOI: 10.3390/mi10100705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 10/10/2019] [Accepted: 10/15/2019] [Indexed: 01/13/2023]
Abstract
Micropatterning is often used to engineer the surface properties of objects because it allows the enhancement or modification of specific functionalities without modification of the bulk material properties. Microneedle arrays have been explored in the past for drug delivery and enhancement of tissue anchoring; however, conventional methods are primarily limited to thick, planar substrates. Here, we demonstrate a method for the fabrication of microneedle arrays on thin flexible polyurethane substrates. These thin-film microneedle arrays can be used to fabricate balloons and other inflatable objects. In addition, these thin-filmed microneedles can be transferred, using thermal forming processes, to more complex 3D objects on which it would otherwise be difficult to directly pattern microneedles. This function is especially useful for medical devices, which require effective tissue anchorage but are a challenging target for micropatterning due to their 3D nonplanar shape, large size, and the complexity of the required micropatterns. Ultrathin flexible thermoplastic polyurethane microneedle arrays were fabricated from a polydimethylsiloxane (PDMS) mold. The technique was applied onto the nonplanar surface of rapidly prototyped soft robotic implantable polyurethane devices. We found that a microneedle-patterned surface can increase the anchorage of the device to a tissue by more than twofold. In summary, our soft lithographic patterning method can rapidly and inexpensively generate thin-film microneedle surfaces that can be used to produce balloons or enhance the properties of other 3D objects and devices.
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Affiliation(s)
- Sun-Joo Jang
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Tejas Doshi
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Jerusalem Nerayo
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Alexandre Caprio
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Seyedhamidreza Alaie
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Jordyn Auge
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - James K Min
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Bobak Mosadegh
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
| | - Simon Dunham
- Dalio Institute of Cardiovascular Imaging, NewYork-Presbyterian Hospital and Weill Cornell Medicine, New York, NY 10021, USA.
- Department of Radiology, Weill Cornell Medicine, New York, NY 10021, USA.
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8
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Park J, Choi JH, Kim S, Jang I, Jeong S, Lee JY. Micropatterned conductive hydrogels as multifunctional muscle-mimicking biomaterials: Graphene-incorporated hydrogels directly patterned with femtosecond laser ablation. Acta Biomater 2019; 97:141-153. [PMID: 31352108 DOI: 10.1016/j.actbio.2019.07.044] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 07/23/2019] [Accepted: 07/24/2019] [Indexed: 12/20/2022]
Abstract
Multifunctional biomaterials that can provide physical, electrical, and structural cues to cells and tissues are highly desirable to mimic the important characteristics of native tissues and efficiently modulate cellular behaviors. Especially, electrically conductive biomaterials can efficiently deliver electrical signals to living systems; however, the production of conductive biomaterials presenting multiple cell interactive cues is still a great challenge. In this study, we fabricafed an electrically conductive, mechanically soft, and topographically active hydrogel by micropatterning a graphene oxide (GO)-incorporated polyacrylamide hydrogel (GO/PAAm) with femtosecond laser ablation (FLA) and subsequent chemical reduction. FLA parameters were optimized to efficiently produce distinct line patterns on GO/PAAm hydrogels to induce myoblast alignment and maturation. The line patterns distances (PD) were varied to have different topographies (20-80 μm PD). In vitro studies with C2C12 myoblasts revealed that the micopatterned hydrogels are superior to the unpatterned substrates in inducing myogenesis and myotube alignment. Reduced GO/PAAm with 50 μm PD, i.e., PD50/r(GO/PAAm), showed the best results among the various features for differentiation and myotube alignment. Electrical stimulation of myoblasts on the micropatterned conductive hydrogels further promoted the differentiation of myoblasts. In vivo implantation studies indicated good tissue compatibility of PD50/r(GO/PAAm) samples. Altogether, we successfully demonstrated that the micropatterned r(GO/PAAm) may offer multiple properties capable of positively affecting myoblast responses. This hydrogel may serve as an effective multifunctional biomaterial, which possesses the topography for cell alignment/maturation, mechanical properties of the native skeletal muscle tissue, and desirable electrical conductivity for delivering electrical signals to cells, for various biomedical applications such as muscle tissue scaffolds. STATEMENT OF SIGNIFICANCE: Micropatterned conductive hydrogels were created by polymerization of a graphene oxide-incorporated polyacrylamide hydrogel, micropatterning with femtosecond laser ablation, and chemical reduction, which can mimic important characteristics of native skeletal muscle tissues. The micropatterned conductive hydro-gels promoted myogenesis/alignment, enabled electrical stimulation of myoblasts, and displayed good tissue compatibility, which can therefore serve as a multifunctional biomaterial that is topographically active, mechanically soft, and electrically conductive for delivering multiple cell stimulating signals for potential skeletal muscle tissue engineering applications.
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9
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Hierarchically structured microgels of SPIONs, nanofibers, and alginate for copper ion removal. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.04.052] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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10
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Birajdar MS, Halake KS, Lee J. Blood-clotting mimetic behavior of biocompatible microgels. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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11
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Martinez-Rivas A, González-Quijano GK, Proa-Coronado S, Séverac C, Dague E. Methods of Micropatterning and Manipulation of Cells for Biomedical Applications. MICROMACHINES 2017; 8:E347. [PMID: 30400538 PMCID: PMC6187909 DOI: 10.3390/mi8120347] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 12/12/2022]
Abstract
Micropatterning and manipulation of mammalian and bacterial cells are important in biomedical studies to perform in vitro assays and to evaluate biochemical processes accurately, establishing the basis for implementing biomedical microelectromechanical systems (bioMEMS), point-of-care (POC) devices, or organs-on-chips (OOC), which impact on neurological, oncological, dermatologic, or tissue engineering issues as part of personalized medicine. Cell patterning represents a crucial step in fundamental and applied biological studies in vitro, hence today there are a myriad of materials and techniques that allow one to immobilize and manipulate cells, imitating the 3D in vivo milieu. This review focuses on current physical cell patterning, plus chemical and a combination of them both that utilizes different materials and cutting-edge micro-nanofabrication methodologies.
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Affiliation(s)
- Adrian Martinez-Rivas
- CIC, Instituto Politécnico Nacional (IPN), Av. Juan de Dios Bátiz S/N, Nueva Industrial Vallejo, 07738 Mexico City, Mexico.
| | - Génesis K González-Quijano
- CONACYT-CNMN, Instituto Politécnico Nacional (IPN), Av. Luis Enrique Erro s/n, Nueva Industrial Vallejo, 07738 Mexico City, Mexico.
| | - Sergio Proa-Coronado
- ENCB, Instituto Politécnico Nacional (IPN), Av. Wilfrido Massieu, Unidad Adolfo López Mateos, 07738 Mexico City, Mexico.
| | | | - Etienne Dague
- LAAS-CNRS, Université de Toulouse, CNRS, Toulouse, France.
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12
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Sapountzi E, Braiek M, Chateaux JF, Jaffrezic-Renault N, Lagarde F. Recent Advances in Electrospun Nanofiber Interfaces for Biosensing Devices. SENSORS (BASEL, SWITZERLAND) 2017; 17:E1887. [PMID: 28813013 PMCID: PMC5579928 DOI: 10.3390/s17081887] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 08/11/2017] [Accepted: 08/13/2017] [Indexed: 01/08/2023]
Abstract
Electrospinning has emerged as a very powerful method combining efficiency, versatility and low cost to elaborate scalable ordered and complex nanofibrous assemblies from a rich variety of polymers. Electrospun nanofibers have demonstrated high potential for a wide spectrum of applications, including drug delivery, tissue engineering, energy conversion and storage, or physical and chemical sensors. The number of works related to biosensing devices integrating electrospun nanofibers has also increased substantially over the last decade. This review provides an overview of the current research activities and new trends in the field. Retaining the bioreceptor functionality is one of the main challenges associated with the production of nanofiber-based biosensing interfaces. The bioreceptors can be immobilized using various strategies, depending on the physical and chemical characteristics of both bioreceptors and nanofiber scaffolds, and on their interfacial interactions. The production of nanobiocomposites constituted by carbon, metal oxide or polymer electrospun nanofibers integrating bioreceptors and conductive nanomaterials (e.g., carbon nanotubes, metal nanoparticles) has been one of the major trends in the last few years. The use of electrospun nanofibers in ELISA-type bioassays, lab-on-a-chip and paper-based point-of-care devices is also highly promising. After a short and general description of electrospinning process, the different strategies to produce electrospun nanofiber biosensing interfaces are discussed.
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Affiliation(s)
- Eleni Sapountzi
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
| | - Mohamed Braiek
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
- Laboratoire des Interfaces et des Matériaux Avancés, Faculté des Sciences de Monastir, Avenue de l'Environnement, University of Monastir, Monastir 5019, Tunisia.
| | - Jean-François Chateaux
- Université Lyon, Université Claude Bernard Lyon 1, CNRS, Institut des Nanotechnologies de Lyon, UMR5270, Bâtiment Léon Brillouin, 6, rue Ada Byron, F-69622 Villeurbanne CEDEX, France.
| | - Nicole Jaffrezic-Renault
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
| | - Florence Lagarde
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
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Han SW, Koh WG. Hydrogel-Framed Nanofiber Matrix Integrated with a Microfluidic Device for Fluorescence Detection of Matrix Metalloproteinases-9. Anal Chem 2016; 88:6247-53. [DOI: 10.1021/acs.analchem.5b04867] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Sang Won Han
- Department
of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
| | - Won-Gun Koh
- Department
of Chemical and
Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
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14
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Derkus B. Applying the miniaturization technologies for biosensor design. Biosens Bioelectron 2016; 79:901-13. [DOI: 10.1016/j.bios.2016.01.033] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 01/11/2016] [Accepted: 01/12/2016] [Indexed: 12/11/2022]
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15
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Mancini RJ, Paluck SJ, Bat E, Maynard HD. Encapsulated Hydrogels by E-beam Lithography and Their Use in Enzyme Cascade Reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:4043-51. [PMID: 27078573 PMCID: PMC4852853 DOI: 10.1021/acs.langmuir.6b00560] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Electron beam (e-beam) lithography was employed to prepare one protein immobilized hydrogel encapsulated inside another by first fabricating protein-reactive hydrogels of orthogonal reactivity and subsequently conjugating the biomolecules. Exposure of thin films of eight arm star poly(ethylene glycol) (PEG) functionalized with biotin (Biotin-PEG), alkyne (Alkyne-PEG) or aminooxy (AO-PEG) end-groups to e-beam radiation resulted in cross-linked hydrogels with the respective functionality. It was determined via confocal microscopy that a nominal size exclusion effect exists for streptavidin immobilized on Biotin-PEG hydrogels of feature sizes ranging from 5 to 40 μm. AO-PEG was subsequently patterned as an encapsulated core inside a contiguous outer shell of Biotin-PEG. Similarly, Alkyne-PEG was patterned as a core inside an AO-PEG shell. The hydrogel reactive end-groups were conjugated to dyes or proteins of complementary reactivity, and the three-dimensional (3-D) spatial orientation was determined for both configurations using confocal microscopy. The enzyme glucose oxidase (GOX) was immobilized in the core of the encapsulated Alkyne-PEG core/ AO-PEG shell architecture, and horseradish peroxidase (HRP) was conjugated to the shell periphery. Bioactivity for the HRP-GOX enzyme pair was observed in this encapsulated configuration by demonstrating that the enzyme pair was capable of enzyme cascade reactions.
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16
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Wang L, Li L, Wang X, Huang D, Yang F, Shen H, Li Z, Wu D. UV-triggered thiol–disulfide exchange reaction towards tailored biodegradable hydrogels. Polym Chem 2016. [DOI: 10.1039/c5py01925g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biodegradable hydrogels were constructed by a UV-triggered thiol–disulfide exchange reaction with temporal and spatial precision.
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Affiliation(s)
- Linlin Wang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Lei Li
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education
- Department of Polymer Science & Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Xing Wang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Da Huang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Fei Yang
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Hong Shen
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
| | - Zichen Li
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Polymer Chemistry & Physics of Ministry of Education
- Department of Polymer Science & Engineering
- College of Chemistry and Molecular Engineering
- Peking University
| | - Decheng Wu
- Beijing National Laboratory for Molecular Sciences
- State Key Laboratory of Polymer Physics & Chemistry
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
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17
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Mahmoudifard M, Soudi S, Soleimani M, Hosseinzadeh S, Esmaeili E, Vossoughi M. Efficient protein immobilization on polyethersolfone electrospun nanofibrous membrane via covalent binding for biosensing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 58:586-94. [PMID: 26478348 DOI: 10.1016/j.msec.2015.09.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 08/26/2015] [Accepted: 09/03/2015] [Indexed: 10/23/2022]
Abstract
In this paper we introduce novel strategy for antibody immobilization using high surface area electrospun nanofibrous membrane based on ethyl-3-(3-dimethylaminopropyl)-carbodiimide/N-hydroxysuccinimide (EDC/NHS) coupling chemistry. To present the high performance of proposed biosensors, anti-staphylococcus enterotoxin B (anti-SEB) was used as a model to demonstrate the utility of our proposed system. Polymer solution of polyethersolfone was used to fabricate fine nanofibrous membrane. Moreover, industrial polyvinylidene fluoride membrane and conventional microtiter plate were also used to compare the efficiency of antibody immobilization. Scanning electron microscopy images were taken to study the morphology of the membranes. The surface activation of nanofibrous membrane was done with the help of O2 plasma. PES nanofibrous membrane with carboxyl functional groups for covalent attachment of antibodies were treated by EDC/NHS coupling agent. The quantity of antibody immobilization was measured by enzyme-linked immuno sorbent assay (ELISA) method. Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR) spectroscopy was performed to confirm the covalent immobilization of antibody on membrane. Atomic force microscopy, scanning electron microscopy and invert fluorescence microscopy were used to analyze the antibody distribution pattern on solid surfaces. Results show that oxygen plasma treatment effectively increased the amount of antibody immobilization through EDC/NHS coupling chemistry. It was found that the use of nanofibrous membrane causes the improved detection signal of ELISA based biosensors in comparison to the standard assay carried out in the 96-well microtiter plate. This method has the potential to improve the ELISA-based biosensor and we believe that this technique can be used in various biosensing methods.
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Affiliation(s)
- Matin Mahmoudifard
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
| | - Sara Soudi
- Stem Cell Biology Department, Stem Cell Technology Research Center, Tehran, Iran; Department of Immunology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Soleimani
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Simzar Hosseinzadeh
- Nanotechnology and Tissue Engineering Department, Stem Cell Technology Research Center, Tehran, Iran; School of Advanced Medical Technologies, Tehran University of Medical Sciences, Tehran, Iran
| | - Elaheh Esmaeili
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran; Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Manouchehr Vossoughi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran; Chemical and Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran.
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Xu S, Deng L, Zhang J, Yin L, Dong A. Composites of electrospun-fibers and hydrogels: A potential solution to current challenges in biological and biomedical field. J Biomed Mater Res B Appl Biomater 2015; 104:640-56. [DOI: 10.1002/jbm.b.33420] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/02/2015] [Accepted: 03/15/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Shuxin Xu
- Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Liandong Deng
- Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Jianhua Zhang
- Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Li Yin
- Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
| | - Anjie Dong
- Department of Polymer Science and Technology and Key Laboratory of Systems Bioengineering of the Ministry of Education; School of Chemical Engineering and Technology, Tianjin University; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300072 China
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19
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20
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Nedjari S, Hébraud A, Eap S, Siegwald S, Mélart C, Benkirane-Jessel N, Schlatter G. Electrostatic template-assisted deposition of microparticles on electrospun nanofibers: towards microstructured functional biochips for screening applications. RSC Adv 2015. [DOI: 10.1039/c5ra15931h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electrostatic Template-Assisted Deposition (ETAD) of microparticles is described as a new process to control the deposition of microparticles by electrospraying onto a substrate.
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Affiliation(s)
- S. Nedjari
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - A. Hébraud
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - S. Eap
- INSERM Unité 1109
- Université de Strasbourg
- F-67085 Strasbourg Cedex
- France
| | - S. Siegwald
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | - C. Mélart
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
| | | | - G. Schlatter
- ICPEES Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé, UMR 7515
- CNRS, Université de Strasbourg
- 67089 Strasbourg Cedex
- France
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21
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Lee HJ, Koh WG. Hydrogel micropattern-incorporated fibrous scaffolds capable of sequential growth factor delivery for enhanced osteogenesis of hMSCs. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9338-9348. [PMID: 24915062 DOI: 10.1021/am501714k] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this study, we developed multi-functional biomimetic tissue engineered scaffolds that are capable of controlling the spatial locations of stem cells and releasing multiple growth factors with a controlled dose and rate of delivery. This novel scaffold was fabricated by combining electrospinning and photolithography and consisted of polycaprolactone (PCL)/gelatin fibers and poly(ethylene glycol) (PEG) hydrogel micropatterns. The utility of this system was investigated in the context of the osteogenesis of human mesenchymal stem cells (hMSCs). When hMSCs were seeded onto hydrogel-incorporated fibrous scaffolds, they selectively adhered and grew only in the fiber region due to the non-adhesiveness of the PEG hydrogel, enabling spatial positioning of hMSCs on a micrometer scale. For osteogenic differentiation of hMSCs, basic fibroblast growth factor (bFGF) and bone morphogenetic protein-2 (BMP-2) were loaded on the fibers and within the hydrogel matrix, respectively, to enable sequential delivery of low doses of bFGF during the early stages and sustained release of BMP-2 for long periods. According to in vitro studies, hMSCs cultured on the scaffolds capable of sequential delivery of bFGF and BMP-2 showed stronger osteogenic commitment in culture than those on scaffolds without any growth factors or scaffolds with single administration of either bFGF or BMP-2 under the same conditions. The results demonstrate that hydrogel-incorporated fibrous scaffolds can provide not only biomimetic structures with micropatterned nanostructures but also a suitable biochemical environment with controlled release of multiple growth factors, which may eventually facilitate the control of stem cell fates for various regenerative therapies.
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Affiliation(s)
- Hyun Jong Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, South Korea
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22
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Kai D, Liow SS, Loh XJ. Biodegradable polymers for electrospinning: towards biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:659-70. [PMID: 25491875 DOI: 10.1016/j.msec.2014.04.051] [Citation(s) in RCA: 218] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/02/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
Abstract
Electrospinning has received much attention recently due to the growing interest in nano-technologies and the unique material properties. This review focuses on recent progress in applying electrospinning technique in production of biodegradable nanofibers to the emerging field of biomedical. It first introduces the basic theory and parameters of nanofibers fabrication, with focus on factors affecting the morphology and fiber diameter of biodegradable nanofibers. Next, commonly electrospun biodegradable nanofibers are discussed, and the comparison of the degradation rate of nanoscale materials with macroscale materials are highlighted. The article also assesses the recent advancement of biodegradable nanofibers in different biomedical applications, including tissue engineering, drug delivery, biosensor and immunoassay. Future perspectives of biodegradable nanofibers are discussed in the last section, which emphasizes on the innovation and development in electrospinning of hydrogels nanofibers, pore size control and scale-up productions.
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Affiliation(s)
- Dan Kai
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
| | - Sing Shy Liow
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore; Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore; Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore 168751, Singapore.
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Puchberger-Enengl D, Krutzler C, Keplinger F, Vellekoop MJ. Single-step design of hydrogel-based microfluidic assays for rapid diagnostics. LAB ON A CHIP 2014; 14:378-83. [PMID: 24270543 DOI: 10.1039/c3lc50944c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
For the first time we demonstrate a microfluidic platform for the preparation of biosensing hydrogels by in situ polymerization of polyethyleneglycol diacrylate (PEG-DA) in a single step. Capillary pressure barriers enable the precise formation of gel microstructures for fast molecule diffusion. Parallel arrangement of these finger structures allows for macroscopic and standard equipment readout methods. The analyte automatically fills the space in between the gel fingers by the hydrophilic nature of the gel. Introducing the functional structures in the chip fabrication allows for rapid assay customization by making surface treatment, gel curing mask alignment and washing steps obsolete. Simple handling and functionality are illustrated by assays for matrix metalloproteinase, an important factor in chronic wound healing. Assays for total protein concentration and cell counts are presented, demonstrating the possibilities for a wide range of fast and simple diagnostics.
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24
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Arakawa T, Watanabe N, Takeda H, Haijima Y, Takanashi H, Obata T, Koiwa I. Magnetic Force-Based Microarray Chips on Soda Lime Glass Prepared by Plating Method for Medical Application. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Shen Y, Liu Y, Zhu G, Fang H, Huang Y, Jiang X, Wang ZL. Patterned polymer nanowire arrays as an effective protein immobilizer for biosensing and HIV detection. NANOSCALE 2013; 5:527-531. [PMID: 23223639 DOI: 10.1039/c2nr33069e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report an array of polymeric nanowires for effectively immobilizing biomolecules on biochips owing to the large surface area. The nanowires were fabricated in predesigned patterns using an inductively coupled plasma (ICP) etching process. Microfluidic biochips integrated using the substrates with arrays of nanowires and polydimethylsiloxane channels have been demonstrated to be effective for detecting antigens, and a detection limit of antigens at 0.2 μg mL(-1) has been achieved, which is improved by a factor of 50 compared to that based on flat substrates without the nanowires. In addition, the high sensitivity for clinical detection of human immunodeficiency virus (HIV) antibody has also been demonstrated, showing a 20 times enhancement in fluorescent signal intensity between the samples with positive and negative HIV.
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Affiliation(s)
- Yue Shen
- School of Material Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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26
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Li Z, Ruan W, Shen S, Wang H, Guo Z, Xue X, Mao Z, Ji W, Wang X, Song W, Zhao B. Tunable two dimensional protein patterns through self-assembly nanosphere template. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:395-400. [PMID: 22722073 DOI: 10.1016/j.saa.2012.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 05/02/2012] [Accepted: 05/07/2012] [Indexed: 06/01/2023]
Abstract
By the aim of constructing surfaces for multi-component and multifunctional bioassay, a microsphere lithography technique was employed to control the surface morphology. Two kinds of protein molecules (antibodies) were used as building blocks. As a result, dual-component biocompatible surfaces with alternate immunoglobulin micropatterns were fabricated. The employed antibodies included human Immunoglobulin G (IgG) and rabbit IgG, which composed nanometer scale surface arrays on the surfaces. The antibodies were identified specially by immunoreactions with labeled antigens of fluorescein isothiocyanate (FITC)-antihuman IgG and tetramethylrhodamine-5-(and 6)-isothiocyanate (TRITC)-antirabbit IgG. The immune responses were confirmed by confocal fluorescence (FL) microscopy. A study on the sensitivity and quantification was done by using surface-enhanced resonance Raman scattering (SERRS) spectroscopy. The obtained SERRS spectra showed satisfactory resolution in the multi-component detection objects. No interference was observed from inner- or interactions of detecting molecules. The detection limits for both of the antigens reached to as low as 1 ng/mL, which was comparable to FL method. Meanwhile, a good linear relationship between SERRS peak intensity and the logarithm of antigens' concentrations (from 1 ng/mL to 1 mg/mL) were observed. The results demonstrated that SERRS is a very promising detection technique for multi-component immunoassay, and has great potential applications in biotechnology and biochemistry.
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Affiliation(s)
- Zhishi Li
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People's Republic of China
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27
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Zhu Q, Trau D. Multiplex detection platform for tumor markers and glucose in serum based on a microfluidic microparticle array. Anal Chim Acta 2012; 751:146-54. [PMID: 23084064 DOI: 10.1016/j.aca.2012.09.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 08/30/2012] [Accepted: 09/06/2012] [Indexed: 02/03/2023]
Abstract
We present a multiplex detection platform based on a microfluidic microparticle array to detect proteins and glucose in serum simultaneously. Multiplex detection of proteins and glucose was performed using biofunctionalized microparticles arrayed on gel-based microstructures integrated in microfluidics. The microparticles immobilized on these microstructures showed high stability under microfluidic flow conditions. With arrays of antibody-coated microbeads, microfluidic quantitative immunoassays for two protein tumor markers, human chorionic gonadotropin (hCG) and prostate specific antigen (PSA) were performed in serum samples with detection limits bellow the cut-off values for cancer diagnosis. Parallel to the immunoassays, quantitative enzymatic assays for glucose in the physiological concentration range were performed. Multiplex detection was achieved by using a spatially encoded microarray. By patterning antibody-coated microbeads and enzyme-containing microparticles on a novel mixed structure array, we successfully demonstrated simultaneous immunoassays (binding based assay) for proteins and an enzymatic assay (reaction kinetic based assay) for glucose. Our microparticle arrays could be potentially used for the detection of multiple categories of biomolecules (proteins, small metabolites and DNA) for clinical diagnostics and other biological applications.
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Affiliation(s)
- Qingdi Zhu
- Department of Bioengineering, National University of Singapore, Singapore
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28
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Matlock-Colangelo L, Cho D, Pitner CL, Frey MW, Baeumner AJ. Functionalized electrospun nanofibers as bioseparators in microfluidic systems. LAB ON A CHIP 2012; 12:1696-1701. [PMID: 22414955 DOI: 10.1039/c2lc21278a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Functionalized electrospun nanofibers were integrated into microfluidic channels to serve as on-chip bioseparators. Specifically, poly(vinyl alcohol) (PVA) nanofiber mats were shown to successfully serve as bioseparators for negatively charged nanoparticles. Nanofibers were electrospun onto gold microelectrodes, which were incorporated into poly(methyl methacrylate) (PMMA) microfluidic devices using UV-assisted thermal bonding. PVA nanofibers functionalized with poly(hexadimethrine bromide) (polybrene) were positively charged and successfully filtered negatively charged liposomes out of a buffer solution, while negatively charged nanofibers functionalized with Poly(methyl vinyl ether-alt-maleic anhydride) (POLY(MVE/MA)) were shown to repel the liposomes. The effect of fiber mat thickness was studied using confocal fluorescence microscopy, determining a quite broad optimal range of thicknesses for specific liposome retention, which simplifies fiber mat production with respect to retention reliability. Finally, it was demonstrated that liposomes bound to positively charged nanofibers could be selectively released using a 4-(2-Hydroxyethyl)piperazine-1-ethanesulfonic acid (HEPES)-sucrose-saline (HSS) solution of pH 9, which dramatically changes the nanofiber zeta potential and renders the positively charged nanofibers negatively charged. This is the first demonstration of functional electrospun nanofibers used to enable sample preparation procedures of isolation and concentration in lab-on-a-chip devices. This has far reaching impact on the ability to integrate functional surfaces and materials into microfluidic devices and to significantly expand their ability toward simple lab-on-a-chip devices.
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29
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Preparation of photolithographically patterned inverse opal hydrogel microstructures and its application to protein patterning. Biosens Bioelectron 2012; 35:243-250. [DOI: 10.1016/j.bios.2012.02.056] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 02/14/2012] [Accepted: 02/26/2012] [Indexed: 11/17/2022]
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30
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Li Q, Cheng K, Weng W, Du P, Han G. Highly sensitive hydrogen peroxide biosensors based on TiO2 nanodots/ITO electrodes. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm30853c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Chigome S, Torto N. A review of opportunities for electrospun nanofibers in analytical chemistry. Anal Chim Acta 2011; 706:25-36. [DOI: 10.1016/j.aca.2011.08.021] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 08/10/2011] [Accepted: 08/12/2011] [Indexed: 02/06/2023]
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32
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Lee HJ, Kim HS, Kim HO, Koh WG. Micropatterns of double-layered nanofiber scaffolds with dual functions of cell patterning and metabolite detection. LAB ON A CHIP 2011; 11:2849-57. [PMID: 21738946 DOI: 10.1039/c1lc20186g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This paper describes the development of multi-functional nanofiber scaffolds consisting of multiple layers of nanofiber scaffolds and nanofiber-incorporated poly(ethylene glycol) (PEG) hydrogels. As a proof-of-concept demonstration, we fabricated micropatterned polymeric nanofiber scaffolds that were capable of simultaneously generating cellular micropatterns within a biomimetic environment and detecting cellular metabolic products within well-defined microdomains. To achieve this goal, we designed nanofiber scaffolds with both vertical and lateral microdomains. Vertically heterogeneous structures that were responsible for multi-functionality were realized by preparing double-layered nanofiber scaffolds consisting of an antibody-immobilized bottom layer of nanofibers and an upper layer of bare polystyrene (PS) nanofibers by a two-step sequential electrospinning process. Photopatterning of poly(ethylene glycol) (PEG) hydrogel on the electrospun nanofibers produced laterally heterogeneous micropatterned nanofiber scaffolds made of hydrogel microwells filled with a nanofibrous region, which is capable of generating cell and protein micropatterns due to the different interactions that cells and proteins have with PEG hydrogels and nanofibers. When HepG2 cells were seeded into resultant nanofiber scaffolds, cells selectively adhered within the 200 μm × 200 μm PS fiber microdomain and formed 180.2 ± 6.7 μm spheroids after 5 days of culture in the upper layer. Furthermore, immobilized anti-albumin in the bottom layer detected albumin secreted by micropatterned HepG2 cells with higher sensitivity than flat PS substrates, demonstrating successful accomplishment of dual functions using micropatterned double-layered nanofiber scaffolds.
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Affiliation(s)
- Hyun Jong Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, 134 Sinchon-Dong, Seodaemoon-Gu, Seoul, 120-749, Republic of Korea
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33
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Butun S, Sahiner N. A versatile hydrogel template for metal nano particle preparation and their use in catalysis. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.08.021] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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34
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Hydrogel particles with core shell morphology for versatile applications: Environmental, biomedical and catalysis. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.06.023] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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