1
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Lipopeptides in promoting signals at surface/interface of micelles: Their roles in repairing cellular and nuclear damages. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2021.101522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Tian L, He L, Jackson K, Mahabir R, Hosseinidoust Z. Bacteria repellent protein hydrogel decorated with tunable, isotropic, nano-on-micro hierarchical microbump array. Chem Commun (Camb) 2021; 57:10883-10886. [PMID: 34604880 DOI: 10.1039/d1cc03741b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the development of ordered shape-controllable microbump structures on protein hydrogels using polystyrene honeycomb templates. Addition of protein nanogels results in the formation of hierarchical nano-on-micro structures and increases surface hydrophilicity by over 55%, exhibiting bacteria repellency 100 times stronger than a flat hydrogel surface composed of the same protein.
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Affiliation(s)
- Lei Tian
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.
| | - Leon He
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.
| | - Kyle Jackson
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.
| | - Randi Mahabir
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada.
| | - Zeinab Hosseinidoust
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada. .,Michael DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario L8S 4K1, Canada.,School of Biomedical Engineering, McMaster University, Hamilton, Ontario L8S 4K1, Canada
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3
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Gong HY, Park J, Kim W, Kim J, Lee JY, Koh WG. A Novel Conductive and Micropatterned PEG-Based Hydrogel Enabling the Topographical and Electrical Stimulation of Myoblasts. ACS APPLIED MATERIALS & INTERFACES 2019; 11:47695-47706. [PMID: 31794187 DOI: 10.1021/acsami.9b16005] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this study, we designed a cell-adhesive poly(ethylene glycol) (PEG)-based hydrogel that simultaneously provides topographical and electrical stimuli to C2C12 myoblasts. Specifically, PEG hydrogels with microgroove structures of 3 μm ridges and 3 μm grooves were prepared by micromolding; in situ polymerization of poly(3,4-ethylenedioxythiophene) (PEDOT) was then performed within the micropatterned PEG hydrogels to create a microgrooved conductive hydrogel (CH/P). The CH/P had clear replica patterns of the silicone mold and a conductivity of 2.49 × 10-3 S/cm, with greater than 85% water content. In addition, the CH exhibited Young's modulus (45.84 ± 7.12 kPa) similar to that of a muscle tissue. The surface of the CH/P was further modified via covalent bonding with cell-adhesive peptides to facilitate cell adhesion without affecting conductivity. An in vitro cell assay revealed that the CH/P was cytocompatible and enhanced the cell alignment and elongation of C2C12 myoblasts. The microgrooves and conductivity of the CH/P had the greatest positive effect on the myogenesis of C2C12 myoblasts compared to the other PEG hydrogel samples without conductivity or/and microgrooves, even in the absence of electrical stimulation. Electrical stimulation studies indicated that the combination of topographical and electrical cues maximized the differentiation of C2C12 myoblasts into myotubes, confirming the synergetic effect of incorporating microgroove surface features and a conductive PEDOT component into hydrogels.
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Affiliation(s)
| | - Junggeon Park
- School of Materials Science and Engineering , Gwangju Institute of Science and Technology (GIST) , Gwangju 61105 , South Korea
| | | | | | - Jae Young Lee
- School of Materials Science and Engineering , Gwangju Institute of Science and Technology (GIST) , Gwangju 61105 , South Korea
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4
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Min KJ, Kim TH, Choi JW. Magnetic Force-Driven Graphene Patterns to Direct Synaptogenesis of Human Neuronal Cells. MATERIALS 2017; 10:ma10101151. [PMID: 28974044 PMCID: PMC5666957 DOI: 10.3390/ma10101151] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 09/27/2017] [Accepted: 09/30/2017] [Indexed: 11/30/2022]
Abstract
Precise control of axonal growth and synaptic junction formation are incredibly important to repair and/or to mimic human neuronal network. Here, we report a graphene oxide (GO)-based hybrid patterns that were proven to be excellent for guiding axonal growth and its consequent synapse formation of human neural cells. Unlike the previous method that utilized micro-contacting printing technique to generate GO patterns, here, GO-encapsulated magnetic nanoparticles were first synthesized and utilized as core materials wherein the external magnetic force facilitated the transfer of GO film to the desired substrate. Owing to the intrinsic property of GO that provides stable cell attachment and growth for long-term culture, human neuronal cells could be effectively patterned on the biocompatible polymer substrates with different pattern sizes. By using magnetic force-driven GO hybrid patterns, we demonstrated that accumulation and expression level of Synaptophysin of neurons could be effectively controlled with varying sizes of each pattern. The synaptic network between each neuron could be precisely controlled and matched by guiding axonal direction. This work provides treatment and modeling of brain diseases and spinal cord injuries.
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Affiliation(s)
- Kyung-Joon Min
- Department of Biomedical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 121-742, Korea.
| | - Tae-Hyung Kim
- School of Integrative Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, Seoul 156-756, Korea.
| | - Jeong-Woo Choi
- Department of Biomedical Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 121-742, Korea.
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro (Sinsu-dong), Mapo-gu, Seoul 121-742, Korea.
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5
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Qujeq D, Abedian Z. Protection of bone marrow, mononuclear, and CD34+ cells by enclosing within the biochemical compound solution during and after transplantation. Cell Biochem Funct 2017; 35:352-357. [PMID: 28849597 DOI: 10.1002/cbf.3275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 06/23/2017] [Accepted: 07/03/2017] [Indexed: 11/10/2022]
Abstract
We have chosen collagen, chitosan acetate, hyaluronic acid, and propolis as model biochemical compound solution to determine the influence of cell carrier mechanics on cell viability and functionality during and after transplantation. Suspending of bone marrow (BM), mononuclear (MN), and CD34+ cells into a biochemical compounds solution is an attractive tool to achieve to protect and ensure reproducible deliver. Hyperglycemic rats were randomly divided into 2 groups: to receive no cell treatment or approximately 1 × 105 of BM, MN, and CD34+ cells within the PBS or biochemical compound solution. These cells were infused into the hyperglycemic rats on day 10 and again on day 20. At each time point, the animals were anaesthetized with ether, and 200 μL of blood was drawn from the tail vein. Samples were collected to determine whether BM, MN, and CD34+ cell affected glucose content and insulin production. Our results exhibit the use of biochemical compound solution method to overcome the cell transplantation problem during and after injection of these cells into rats. These findings are supported by resulting in significantly greater insulin production and more decreased glucose content than cells injected in PBS only (P < 0.05). These effects displayed the following hierarchy: hyaluronic acid > chitosan acetate > collagen > propolis solution. Our results showed that these compounds demonstrated a capacity to encapsulate the BM, MN, and CD34+ cells. It is proven by decreasing glucose content and increasing insulin secretion by pancreatic cells. The uniqueness of our study is the improvement of current transplantation efficiency.
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Affiliation(s)
- Durdi Qujeq
- Cellular and Molecular Biology Research Center (CMBRC), Health Research Institute, Babol University of Medical Sciences, Babol, Iran.,Department of Clinical Biochemistry, Faculty of Medicine, Babol University of Medical Sciences, Babol, Iran
| | - Zeinab Abedian
- Cellular and Molecular Biology Research Center (CMBRC), Health Research Institute, Babol University of Medical Sciences, Babol, Iran
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6
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Kim YS, Cho K, Lee HJ, Chang S, Lee H, Kim JH, Koh WG. Highly conductive and hydrated PEG-based hydrogels for the potential application of a tissue engineering scaffold. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.09.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Yang L, Shridhar SV, Gerwitz M, Soman P. An
in vitro
vascular chip using 3D printing-enabled hydrogel casting. Biofabrication 2016; 8:035015. [DOI: 10.1088/1758-5090/8/3/035015] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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8
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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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9
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Rapid Fabrication of Hydrogel Microstructures Using UV-Induced Projection Printing. MICROMACHINES 2015. [DOI: 10.3390/mi6121464] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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10
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Kim TH, Shah S, Yang L, Yin PT, Hossain MK, Conley B, Choi JW, Lee KB. Controlling differentiation of adipose-derived stem cells using combinatorial graphene hybrid-pattern arrays. ACS NANO 2015; 9:3780-90. [PMID: 25840606 PMCID: PMC5808889 DOI: 10.1021/nn5066028] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Control of stem cell fate by modulating biophysical cues (e.g., micropatterns, nanopatterns, elasticity and porosity of the substrates) has emerged as an attractive approach in stem cell-based research. Here, we report a method for fabricating combinatorial patterns of graphene oxide (GO) to effectively control the differentiation of human adipose-derived mesenchymal stem cells (hADMSCs). In particular, GO line patterns were highly effective for modulating the morphology of hADMSCs, resulting in enhanced differentiation of hADMSCs into osteoblasts. Moreover, by generating GO grid patterns, we demonstrate the highly efficient conversion of mesodermal stem cells to ectodermal neuronal cells (conversion efficiency = 30%), due to the ability of the grid patterns to mimic interconnected/elongated neuronal networks. This work provides an early demonstration of developing combinatorial graphene hybrid-pattern arrays for the control of stem cell differentiation, which can potentially lead to more effective stem cell-based treatment of incurable diseases/disorders.
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Affiliation(s)
- Tae-Hyung Kim
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
- Department of Chemical & Biomolecular Engineering, Sogang University 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Shreyas Shah
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Letao Yang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Perry T. Yin
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Md. Khaled Hossain
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Brian Conley
- Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, 604 Allison Road, Piscataway, New Jersey 08854, United States
| | - Jeong-Woo Choi
- Department of Chemical & Biomolecular Engineering, Sogang University 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 121-742, Republic of Korea
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, New Jersey 08854, United States
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11
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Wang C, Feng B. Research progress on site-oriented and three-dimensional immobilization of protein. Mol Biol 2015. [DOI: 10.1134/s0026893315010173] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Jang E, Kim M, Koh WG. Ag@SiO2-entrapped hydrogel microarray: a new platform for a metal-enhanced fluorescence-based protein assay. Analyst 2015; 140:3375-83. [DOI: 10.1039/c5an00251f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We developed a novel silver-based metal-enhanced fluorescence (MEF) biosensing platform that consisted of poly(ethylene glycol)(PEG) hydrogel microstructures entrapping silica-coated silver nanoparticles (Ag@SiO2).
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Affiliation(s)
- Eunji Jang
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 120-749
- South Korea
| | - Minsu Kim
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 120-749
- South Korea
| | - Won-Gun Koh
- Department of Chemical and Biomolecular Engineering
- Yonsei University
- Seoul 120-749
- South Korea
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13
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Kim LN, Kim M, Jung K, Bae HJ, Jang J, Jung Y, Kim J, Kwon S. Shape-encoded silica microparticles for multiplexed bioassays. Chem Commun (Camb) 2015; 51:12130-3. [DOI: 10.1039/c5cc02048d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Shape-encoded silica microparticles for use in multiplexed bioassays were fabricated by using optofluidic maskless lithography (OFML) and tetraethylorthosilicate (TEOS) polymerization.
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Affiliation(s)
- Lily Nari Kim
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
| | - Mira Kim
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
| | - Keumsim Jung
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
- Quanta Matrix corp
| | - Hyung Jong Bae
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
| | - Jisung Jang
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
- Quanta Matrix corp
| | - Yushin Jung
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
| | - Jiyun Kim
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
| | - Sunghoon Kwon
- School of Electrical Engineering and Computer Science
- Seoul National University
- Seoul 151-744
- South Korea
- Quanta Matrix corp
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14
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Preparation of Fe₃O₄-Embedded Poly(styrene)/Poly(thiophene) Core/Shell Nanoparticles and Their Hydrogel Patterns for Sensor Applications. MATERIALS 2014; 7:195-205. [PMID: 28788450 PMCID: PMC5453122 DOI: 10.3390/ma7010195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 12/26/2013] [Accepted: 12/27/2013] [Indexed: 11/17/2022]
Abstract
This research describes the preparation and sensor applications of multifunctional monodisperse, Fe₃O₄ nanoparticles-embedded poly(styrene)/poly(thiophene) (Fe₃O₄-PSt/PTh), core/shell nanoparticles. Monodisperse Fe₃O₄-PSt/PTh nanoparticles were prepared by free-radical combination (mini-emulsion/emulsion) polymerization for Fe₃O₄-PSt core and oxidative seeded emulsion polymerization for PTh shell in the presence of FeCl₃/H₂O₂ as a redox catalyst, respectively. For applicability of Fe₃O₄-PSt/PTh as sensors, Fe₃O₄-PSt/PTh-immobilized poly(ethylene glycol) (PEG)-based hydrogels were fabricated by photolithography. The hydrogel patterns showed a good sensing performance under different H₂O₂ concentrations. They also showed a quenching sensitivity of 1 µg/mL for the Pd2+ metal ion within 1 min. The hydrogel micropatterns not only provide a fast water uptake property but also suggest the feasibility of both H₂O₂ and Pd2+ detection.
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15
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Zhang Y, Yu Y, Ozbolat IT. Direct Bioprinting of Vessel-Like Tubular Microfluidic Channels. J Nanotechnol Eng Med 2013; 4. [PMCID: PMC3732022 DOI: 10.1115/1.4024398] [Citation(s) in RCA: 103] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 04/26/2013] [Indexed: 09/12/2023]
Abstract
Despite the progress in tissue engineering, several challenges must be addressed for organ printing to become a reality. The most critical challenge is the integration of a vascular network, which is also a problem that the majority of tissue engineering technologies are facing. An embedded microfluidic channel network is probably the most promising solution to this problem. However, the available microfluidic channel fabrication technologies either have difficulty achieving a three-dimensional complex structure or are difficult to integrate within cell printing process in tandem. In this paper, a novel printable vessel-like microfluidic channel fabrication method is introduced that enables direct bioprinting of cellular microfluidic channels in form of hollow tubes. Alginate and chitosan hydrogels were used to fabricate microfluidic channels showing the versatility of the process. Geometric characterization was performed to understand effect of biomaterial and its flow rheology on geometric properties. Microfluidic channels were printed and embedded within bulk hydrogel to test their functionality through perfusion of cell type oxygenized media. Cell viability experiments were conducted and showed great promise of the microfluidic channels for development of vascular networks.
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Affiliation(s)
- Yahui Zhang
- BioMfG Laboratory,Center for Computer-Aided Design,The University of Iowa,Iowa City, IA 52242;Department of Mechanical and Industrial Engineering,The University of Iowa,Iowa City, IA 52242
| | - Yin Yu
- BioMfG Laboratory,Center for Computer-Aided Design,The University of Iowa,Iowa City, IA 52242;Department of Biomedical Engineering,The University of Iowa,Iowa City, IA 52242
| | - Ibrahim T. Ozbolat
- BioMfG Laboratory,Center for Computer-Aided Design,The University of Iowa,Iowa City, IA 52242;Department of Mechanical and Industrial Engineering,The University of Iowa,Iowa City, IA 52242e-mail:
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17
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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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18
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Benz K, Stippich C, Osswald C, Gaissmaier C, Lembert N, Badke A, Steck E, Aicher WK, Mollenhauer JA. Rheological and biological properties of a hydrogel support for cells intended for intervertebral disc repair. BMC Musculoskelet Disord 2012; 13:54. [PMID: 22490206 PMCID: PMC3375205 DOI: 10.1186/1471-2474-13-54] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 04/10/2012] [Indexed: 01/08/2023] Open
Abstract
Background Cell-based approaches towards restoration of prolapsed or degenerated intervertebral discs are hampered by a lack of measures for safe administration and placement of cell suspensions within a treated disc. In order to overcome these risks, a serum albumin-based hydrogel has been developed that polymerizes after injection and anchors the administered cell suspension within the tissue. Methods A hydrogel composed of chemically activated albumin crosslinked by polyethylene glycol spacers was produced. The visco-elastic gel properties were determined by rheological measurement. Human intervertebral disc cells were cultured in vitro and in vivo in the hydrogel and their phenotype was tested by reverse-transcriptase polymerase chain reaction. Matrix production and deposition was monitored by immuno-histology and by biochemical analysis of collagen and glycosaminoglycan deposition. Species specific in situ hybridization was performed to discriminate between cells of human and murine origin in xenotransplants. Results The reproducibility of the gel formation process could be demonstrated. The visco-elastic properties were not influenced by storage of gel components. In vitro and in vivo (subcutaneous implants in mice) evidence is presented for cellular differentiation and matrix deposition within the hydrogel for human intervertebral disc cells even for donor cells that have been expanded in primary monolayer culture, stored in liquid nitrogen and re-activated in secondary monolayer culture. Upon injection into the animals, gels formed spheres that lasted for the duration of the experiments (14 days). The expression of cartilage- and disc-specific mRNAs was maintained in hydrogels in vitro and in vivo, demonstrating the maintenance of a stable specific cellular phenotype, compared to monolayer cells. Significantly higher levels of hyaluronan synthase isozymes-2 and -3 mRNA suggest cell functionalities towards those needed for the support of the regeneration of the intervertebral disc. Moreover, mouse implanted hydrogels accumulated 5 times more glycosaminoglycans and 50 times more collagen than the in vitro cultured gels, the latter instead releasing equivalent quantities of glycosaminoglycans and collagen into the culture medium. Matrix deposition could be specified by immunohistology for collagen types I and II, and aggrecan and was found only in areas where predominantly cells of human origin were detected by species specific in situ hybridization. Conclusions The data demonstrate that the hydrogels form stable implants capable to contain a specifically functional cell population within a physiological environment.
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Affiliation(s)
- Karin Benz
- NMI Natural and Medical Sciences Institute at the University of Tuebingen, Reutlingen, Germany
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19
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Kador KE, Subramanian A. Surface Modification of Biomedical Grade Polyurethane to Enable the Ordered Co-immobilization of Two Proteins. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 22:1983-99. [DOI: 10.1163/092050610x529191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Karl E. Kador
- a Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, 207 Othmer Hall, Lincoln, NE 68588-0643, USA
| | - Anuradha Subramanian
- b Department of Chemical and Biomolecular Engineering, University of Nebraska, Lincoln, 207 Othmer Hall, Lincoln, NE 68588-0643, USA.
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20
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Lee AG, Beebe DJ, Palecek SP. Quantification of kinase activity in cell lysates via photopatterned macroporous poly(ethylene glycol) hydrogel arrays in microfluidic channels. Biomed Microdevices 2012; 14:247-57. [PMID: 22069079 PMCID: PMC3299890 DOI: 10.1007/s10544-011-9602-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
The efficacy of tyrosine kinase inhibitors (TKIs) as cancer therapeutics varies amongst individual patients as a result of patient-specific differences in molecular regulation of cancer development and progression, and acquisition of resistance to TKIs during therapy. A sensitive assay that can quantify kinase activity and predict inhibition of that activity from minimally invasive patient tissue samples may aid design of efficacious individualized TKI treatments. A microfluidic format can be useful in reducing limitations in standard protein kinase assays, including sensitivity required and low sample volume available. We present photopatterned macroporous poly(ethylene glycol) diacrylate hydrogel pillars functionalized with kinase substrates within microchannels for quantifying kinase activity in complex cellular lysates. We determined the effect of using a porogen to induce macroporosity in hydrogel pillars and showed that hydrogel poration enhanced the sensitivity of detecting Bcr-Abl activity in cell lysates by an order of magnitude. Bcr-Abl tyrosine kinase activity in K562 cell lysates could be detected from 0.01 μg/μL of cell lysate, corresponding to approximately 500 cells, using GST-Crkl immobilized in macroporous hydrogels. This device was also capable of quantifying inhibition of Bcr-Abl activity by imatinib mesylate, which demonstrates the potential to predict the biochemical response to drug inhibitors. These results indicate that microfluidic devices containing macroporous hydrogels functionalized with kinase substrates provide a promising platform for sensitive and specific quantification of kinase activity and efficacy of kinase inhibitors in cancer cell lysates.
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Affiliation(s)
- Andrew G. Lee
- Department of Chemical and Biological Engineering, University of Wisconsin - Madison, 1415 Engineering Drive, Madison, WI 53706
| | - David J. Beebe
- Department of Biomedical Engineering, University of Wisconsin – Madison, 1550 Engineering Drive, Madison, WI 53706
| | - Sean P. Palecek
- Department of Chemical and Biological Engineering, University of Wisconsin - Madison, 1415 Engineering Drive, Madison, WI 53706
- Department of Biomedical Engineering, University of Wisconsin – Madison, 1550 Engineering Drive, Madison, WI 53706
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Tanase CP, Albulescu R, Neagu M. Application of 3D hydrogel microarrays in molecular diagnostics: advantages and limitations. Expert Rev Mol Diagn 2011; 11:461-4. [PMID: 21707453 DOI: 10.1586/erm.11.30] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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22
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Lee HJ, Kim DN, Park S, Lee Y, Koh WG. Micropatterning of a nanoporous alumina membrane with poly(ethylene glycol) hydrogel to create cellular micropatterns on nanotopographic substrates. Acta Biomater 2011; 7:1281-9. [PMID: 21056702 DOI: 10.1016/j.actbio.2010.11.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 09/28/2010] [Accepted: 11/02/2010] [Indexed: 10/18/2022]
Abstract
In this paper, we describe a simple method for fabricating micropatterned nanoporous substrates that are capable of controlling the spatial positioning of mammalian cells. Micropatterned substrates were prepared by fabricating poly(ethylene glycol) (PEG) hydrogel microstructures on alumina membranes with 200 nm nanopores using photolithography. Because hydrogel precursor solution could infiltrate and become crosslinked within the nanopores, the resultant hydrogel micropatterns were firmly anchored on the substrate without the use of adhesion-promoting monolayers, thereby allow tailoring of the surface properties of unpatterned nanoporous areas. For mammalian cell patterning, arrays of microwells of different dimensions were fabricated. These microwells were composed of hydrophilic PEG hydrogel walls surrounding nanoporous bottoms that were modified with cell-adhesive Arg-Gly-Asp (RGD) peptides. Because the PEG hydrogel was non-adhesive towards proteins and cells, cells adhered selectively and remained viable within the RGD-modified nanoporous regions, thereby creating cellular micropatterns. Although the morphology of cell clusters and the number of cells inside one microwell were dependent on the lateral dimension of the microwells, adhered cells that were in direct contact with nanopores were able to penetrate into the nanopores by small extensions (filopodia) for all the different sizes of microwells evaluated.
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23
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Baraniak PR, Nelson DM, Leeson CE, Katakam AK, Friz JL, Cress DE, Hong Y, Guan J, Wagner WR. Spatial control of gene expression within a scaffold by localized inducer release. Biomaterials 2011; 32:3062-71. [PMID: 21269687 DOI: 10.1016/j.biomaterials.2010.12.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Accepted: 12/26/2010] [Indexed: 12/31/2022]
Abstract
Gene expression can be controlled in genetically modified cells by employing an inducer/promoter system where presence of the inducer molecule regulates the timing and level of gene expression. By applying the principles of controlled release, it should be possible to control gene expression on a biomaterial surface by the presence or absence of inducer release from the underlying material matrix, thus avoiding alternative techniques that rely upon uptake of relatively labile DNA from material surfaces. To evaluate this concept, a modified ecdysone-responsive gene expression system was transfected into B16 murine cells and the ability of an inducer ligand, which was released from elastomeric poly(ester urethane) urea (PEUU), to initiate gene expression was studied. The synthetic inducer ligand was first loaded into PEUU to demonstrate extended release of the bioactive molecule at various loading densities over a one year period in vitro. Patterning films of PEUU variably-loaded with inducer resulted in spatially controlled cell expression of the gene product (green fluorescent protein, GFP). In porous scaffolds made from PEUU by salt leaching, where the central region was exclusively loaded with inducer, cells expressed GFP predominately in the loaded central regions whereas expression was minimal in outer regions where ligand was omitted. This scaffold system may ultimately provide a means to precisely control progenitor cell commitment in a spatially-defined manner in vivo for soft tissue repair and regeneration.
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Affiliation(s)
- Priya R Baraniak
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
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24
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de Lange V, Binkert A, Vörös J, Bally M. Microarrays made easy: biofunctionalized hydrogel channels for rapid protein microarray production. ACS APPLIED MATERIALS & INTERFACES 2011; 3:50-57. [PMID: 21141937 DOI: 10.1021/am100849f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present a simple, inexpensive, and sensitive technique for producing multiple copies of a hydrogel-based protein microarray. An agarose block containing 25 biofunctionalized channels is sliced perpendicularly to produce many identical biochips. Each microarray consists of 500 μm spots, which contain protein-coated microparticles physically trapped in porous SeaPrep agarose. Proteins diffuse readily through SeaPrep agarose, while the larger microparticles are immobilized in the hydrogel matrix. Without major assay optimization, the limit of detection is 12 pM for a sandwich assay detecting human IgG. These highly flexible, multiplexed arrays can be produced rapidly without any special instrumentation and are compatible with standard fluorescence-based read-out.
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Affiliation(s)
- Victoria de Lange
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, University and ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland
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25
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Design considerations in the use of interdigitated microsensor electrode arrays (IMEs) for impedimetric characterization of biomimetic hydrogels. Biomed Microdevices 2010; 13:279-89. [DOI: 10.1007/s10544-010-9492-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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26
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Park SJ, Bae H, Kim J, Lim B, Park J, Park S. Motility enhancement of bacteria actuated microstructures using selective bacteria adhesion. LAB ON A CHIP 2010; 10:1706-1711. [PMID: 20422075 DOI: 10.1039/c000463d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Microrobots developed by the technological advances are useful for application in various fields. Nevertheless, they have limitations with respect to their actuator and motility. Our experiments aim to determine whether a bioactuator using the flagellated bacteria Serratia marcescens would enhance the motility of microrobots. In this study, we investigate that the flagellated bacteria Serratia marcescens could be utilized as actuators for SU-8 microstructures by bovine serum albumin-selective patterning. Firstly, we analyze the adherence of the bacteria to the SU-8 micro cube by selective patterning using 5% BSA. The results show that number of attached-bacteria in the uncoated side of the selectively- coated micro cube with BSA increased by 200% compared with that in all sides of the non treated micro cube. Secondly, the selectively BSA coated micro cube had 210% higher motility than the uncoated micro cube. The results revealed that the bacteria patterned to a specific site using 5% BSA significantly increase the motility of the bacteria actuated microstructure.
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Affiliation(s)
- Sung Jun Park
- School of Mechanical Systems Engineering, Chonnam National University, Gwangju 500-757, Korea
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27
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Printed protein microarrays on unmodified plastic substrates. Anal Chim Acta 2010; 671:92-8. [DOI: 10.1016/j.aca.2010.05.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 05/03/2010] [Accepted: 05/05/2010] [Indexed: 11/23/2022]
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28
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Pilkington SM, Roberts SJ, Meade SJ, Gerrard JA. Amyloid fibrils as a nanoscaffold for enzyme immobilization. Biotechnol Prog 2010; 26:93-100. [PMID: 19918761 DOI: 10.1002/btpr.309] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Amyloid fibrils are a misfolded state, formed by many proteins when subjected to denaturing conditions. Their constituent amino acids make them ideally suited as a readily functionalized nanoscaffold for enzyme immobilization and their strength, stability, and nanometer size are attractive features for exploitation in the creation of new bionanomaterials. We report successful functionalization of amyloid fibrils by conjugation to glucose oxidase (GOD) using glutaraldehyde. GOD retained activity upon attachment and successful cross-linking was determined using electrophoresis, centrifugation, sucrose gradient centrifugation, and TEM. The resulting functionalized enzyme scaffold was then incorporated into a model poly(vinyl alcohol) (PVOH) film, to create a new bionanomaterial. The antibacterial effect of the functionalized film was then tested on E. coli, the growth of which was inhibited, demonstrating the incorporation of GOD antibacterial activity into the PVOH film. The incorporation of the GOD-functionalized amyloid fibrils into PVOH provides an excellent 'proof of concept' model for the creation of a new bionanomaterial using a functionalized amyloid fibril scaffold.
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Affiliation(s)
- Sarah M Pilkington
- School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
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29
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Guiseppi-Elie A. Electroconductive hydrogels: synthesis, characterization and biomedical applications. Biomaterials 2010; 31:2701-16. [PMID: 20060580 DOI: 10.1016/j.biomaterials.2009.12.052] [Citation(s) in RCA: 427] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2009] [Accepted: 12/18/2009] [Indexed: 10/20/2022]
Abstract
Electroconductive hydrogels (ECHs) are composite biomaterials that bring together the redox switching and electrical properties of inherently conductive electroactive polymers (CEPs) with the facile small molecule transport, high hydration levels and biocompatibility of cross-linked hydrogels. General methods for the synthesis of electroconductive hydrogels as polymer blends and as polymer co-networks via chemical oxidative, electrochemical and/or a combination of chemical oxidation followed by electrochemical polymerization techniques are reviewed. Specific examples are introduced to illustrate the preparation of electroconductive hydrogels that were synthesized from poly(HEMA)-based hydrogels with polyaniline and from poly(HEMA)-based hydrogels with polypyrrole. The key applications of electroconductive hydrogels; as biorecognition membranes for implantable biosensors, as electro-stimulated drug release devices for programmed delivery, and as the low interfacial impedance layers on neuronal prostheses are highlighted. These applications provide great new horizons for these stimuli responsive, biomimetic polymeric materials.
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Affiliation(s)
- Anthony Guiseppi-Elie
- ABTECH Scientific, Inc., Biotechnology Research Park, 800 East Leigh Street, Richmond, VA 23219, USA.
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30
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Lee SW, Lee HJ, Choi JH, Koh WG, Myoung JM, Hur JH, Park JJ, Cho JH, Jeong U. Periodic array of polyelectrolyte-gated organic transistors from electrospun poly(3-hexylthiophene) nanofibers. NANO LETTERS 2010; 10:347-51. [PMID: 19994870 DOI: 10.1021/nl903722z] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
High-performance organic field-effect transistors (OFETs) based on polyelectrolyte gate dielectric and electrospun poly(3-hexylthiophene) (P3HT) nanofibers were fabricated on a flexible polymer substrate. The use of UV-crosslinked hydrogel including ionic liquids for the insulating layer enabled fast and large-area fabrication of transistor arrays. The P3HT nanofibers were directly deposited on the methacrylated polymer substrate. During UV irradiation through a patterned mask, the methacrylate groups formed covalent bonds with the patterned polyelectrolyte dielectric layer, which provides mechanical stability to the devices. The OFETs operate at voltages of less than 2 V. The average field-effect mobility and on/off ratio were approximately 2 cm(2)/(Vs) and 10(5), respectively.
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Affiliation(s)
- Sung W Lee
- Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul, Korea
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31
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Jang E, Son KJ, Kim B, Koh WG. Phenol biosensor based on hydrogel microarrays entrapping tyrosinase and quantum dots. Analyst 2010; 135:2871-8. [DOI: 10.1039/c0an00353k] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Volcke C, Gandhiraman RP, Basabe-Desmonts L, Iacono M, Gubala V, Cecchet F, Cafolla AA, Williams DE. Protein pattern transfer for biosensor applications. Biosens Bioelectron 2009; 25:1295-300. [PMID: 19900799 DOI: 10.1016/j.bios.2009.10.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Revised: 09/24/2009] [Accepted: 10/13/2009] [Indexed: 10/20/2022]
Abstract
This paper presents a very simple, industrially scalable method for transferring a high-resolution, biologically active protein pattern from one substrate to another. We demonstrate the transfer of a protein pattern formed initially by microcontact printing from a silicon surface (to which this form of printing is applicable) onto a glass or polymer substrate, almost independently of the surface/bulk properties of the second substrate. A very thin, spin-coated layer of a sugar is used to preserve the structure and organization of proteins during the subsequent plasma deposition of a siloxane polymer, after which the protein pattern could simply be peeled off the silicon substrate and glued onto any other desired substrate.
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Affiliation(s)
- C Volcke
- Biomedical Diagnostics Institute (BDI), Dublin City University, Dublin, Ireland.
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33
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Boztas AO, Guiseppi-Elie A. Immobilization and Release of the Redox Mediator Ferrocene Monocarboxylic Acid from within Cross-Linked p(HEMA-co-PEGMA-co-HMMA) Hydrogels. Biomacromolecules 2009; 10:2135-43. [DOI: 10.1021/bm900299b] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ali Ozgur Boztas
- Center for Bioelectronics, Biosensors and Biochips (C3B), Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, South Carolina, 29625, Department of Chemical and Biomolecular Engineering and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
| | - Anthony Guiseppi-Elie
- Center for Bioelectronics, Biosensors and Biochips (C3B), Clemson University Advanced Materials Center, 100 Technology Drive, Anderson, South Carolina, 29625, Department of Chemical and Biomolecular Engineering and Department of Bioengineering, Clemson University, Clemson, South Carolina 29634
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34
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Justin G, Rahman A, Guiseppi-Elie A. Bioactive Hydrogel Layers on Microdisk Electrode Arrays: Cyclic Voltammetry Experiments and Simulations. ELECTROANAL 2009. [DOI: 10.1002/elan.200804548] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Park S, Lee Y, Kim DN, Park S, Jang E, Koh WG. Entrapment of enzyme-linked magnetic nanoparticles within poly(ethylene glycol) hydrogel microparticles prepared by photopatterning. REACT FUNCT POLYM 2009. [DOI: 10.1016/j.reactfunctpolym.2009.02.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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36
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Simple fabrication of functionalized surface with polyethylene glycol microstructure and glycidyl methacrylate moiety for the selective immobilization of proteins and cells. KOREAN J CHEM ENG 2008. [DOI: 10.1007/s11814-008-0241-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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