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Coates RJ, Young MT, Scofield S. Optimising expression and extraction of recombinant proteins in plants. FRONTIERS IN PLANT SCIENCE 2022; 13:1074531. [PMID: 36570881 PMCID: PMC9773421 DOI: 10.3389/fpls.2022.1074531] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Recombinant proteins are of paramount importance for research, industrial and medical use. Numerous expression chassis are available for recombinant protein production, and while bacterial and mammalian cell cultures are the most widely used, recent developments have positioned transgenic plant chassis as viable and often preferential options. Plant chassis are easily maintained at low cost, are hugely scalable, and capable of producing large quantities of protein bearing complex post-translational modification. Several protein targets, including antibodies and vaccines against human disease, have been successfully produced in plants, highlighting the significant potential of plant chassis. The aim of this review is to act as a guide to producing recombinant protein in plants, discussing recent progress in the field and summarising the factors that must be considered when utilising plants as recombinant protein expression systems, with a focus on optimising recombinant protein expression at the genetic level, and the subsequent extraction and purification of target proteins, which can lead to substantial improvements in protein stability, yield and purity.
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Geissler M, Ponton A, Nassif C, Malic L, Turcotte K, Lukic L, Morton KJ, Veres T. Use of Polymer Micropillar Arrays as Templates for Solid-Phase Immunoassays. ACS APPLIED POLYMER MATERIALS 2022; 4:5287-5297. [PMID: 37552739 PMCID: PMC9173674 DOI: 10.1021/acsapm.2c00163] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 04/20/2022] [Indexed: 08/10/2023]
Abstract
We investigate the use of periodic micropillar arrays produced by high-fidelity microfabrication with cyclic olefin polymers for solid-phase immunoassays. These three-dimensional (3D) templates offer higher surface-to-volume ratios than two-dimensional substrates, making it possible to attach more antibodies and so increase the signal obtained by the assay. Micropillar arrays also provide the capacity to induce wicking, which is used to distribute and confine antibodies on the surface with spatial control. Micropillar array substrates are modified by using oxygen plasma treatment, followed by grafting of (3-aminopropyl)triethoxysilane for binding proteins covalently using glutaraldehyde as a cross-linker. The relationship between microstructure and fluorescence signal was investigated through variation of pitch (10-50 μm), pillar diameter (5-40 μm), and pillar height (5-57 μm). Our findings suggest that signal intensity scales proportionally with the 3D surface area available for performing solid-phase immunoassays. A linear relationship between fluorescence intensity and microscale structure can be maintained even when the aspect ratio and pillar density both become very high, opening the possibility of tuning assay response by design such that desired signal intensity is obtained over a wide dynamic range compatible with different assays, analyte concentrations, and readout instruments. We demonstrate the versatility of the approach by performing the most common immunoassay formats-direct, indirect, and sandwich-in a qualitative fashion by using colorimetric and fluorescence-based detection for a number of clinically relevant protein markers, such as tumor necrosis factor alpha, interferon gamma (IFN-γ), and spike protein of severe acute respiratory syndrome coronavirus 2. We also show quantitative detection of IFN-γ in serum using a fluorescence-based sandwich immunoassay and calibrated samples with spike-in concentrations ranging from 50 pg/mL to 5 μg/mL, yielding an estimated limit of detection of ∼1 pg/mL for arrays with high micropillar density (11561 per mm2) and aspect ratio (1:11.35).
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Affiliation(s)
- Matthias Geissler
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - André Ponton
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Christina Nassif
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Lidija Malic
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Karine Turcotte
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Ljuboje Lukic
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Keith J. Morton
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
| | - Teodor Veres
- Life Sciences Division, National Research Council of
Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4,
Canada
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Ku J, Kim S, Park J, Kim TS, Kharbash R, Shin EC, Char K, Kim Y, Li S. Reactive Polymer Targeting dsRNA as Universal Virus Detection Platform with Enhanced Sensitivity. Biomacromolecules 2020; 21:2440-2454. [PMID: 32233463 DOI: 10.1021/acs.biomac.0c00379] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Reactive poly(pentafluorophenyl acrylate) (PPFPA)-grafted surfaces offer a versatile platform to immobilize biomolecules. Here, we utilize PPFPA-grafted surface and double-stranded RNA (dsRNA) recognizing J2 antibody to construct a universal virus detection platform with enhanced sensitivity. PPFPA on silicon substrates is prepared, and surface hydrophilicity is modulated by partial substitution of the pentafluorophenyl units with poly(ethylene glycol). Following dsRNA antibody immobilization, the prepared surfaces can distinguish long dsRNAs from single-stranded RNAs of the same length and short dsRNAs. As long dsRNAs are common byproducts of viral transcription/replication, these surfaces can detect the presence of different kinds of viruses without prior knowledge of their genomic sequences. To increase dsRNA detection sensitivity, a two-step method is devised where the captured dsRNAs are visualized with multiple fluorophore-tagged J2 antibodies. We show that the developed platform can differentiate foreign long dsRNAs from cellular dsRNAs and other biomolecules present in the cell lysate. Moreover, when tested against cells infected with hepatitis A or C viruses, both viruses are successfully detected using a single platform. Our study shows that the developed PPFPA platform immobilized with J2 antibody can serve as a primary diagnostic tool to determine the infection status for a wide range of viruses.
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Affiliation(s)
- Jayoung Ku
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea.,KI for Health Science and Technology (KIHST), KAIST, Daejeon 34141 South Korea
| | - Sura Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea
| | - Jaemin Park
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea
| | - Tae-Shin Kim
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141 South Korea
| | - Raisa Kharbash
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea.,KI for Health Science and Technology (KIHST), KAIST, Daejeon 34141 South Korea
| | - Eui-Cheol Shin
- Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141 South Korea
| | - Kookheon Char
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, South Korea
| | - Yoosik Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea.,KI for Health Science and Technology (KIHST), KAIST, Daejeon 34141 South Korea
| | - Sheng Li
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141 South Korea
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BRAF protein immunoprecipitation, elution, and digestion from cell extract using a microfluidic mixer for mutant BRAF protein quantification by mass spectrometry. Anal Bioanal Chem 2019; 411:1085-1094. [PMID: 30604035 DOI: 10.1007/s00216-018-1536-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/23/2018] [Accepted: 12/03/2018] [Indexed: 10/27/2022]
Abstract
This study utilized a microfluidic mixer for the sample pretreatment of cell extracts for target protein quantification by mass spectrometers, including protein immunoprecipitation and protein enzymatic digestion. The time of sample pretreatment was reduced and thus the throughput of quantitative mutant proteins was increased by using the proposed method. Whole cell lysates of the cancer cell line HT-29 with gene mutations were used as the sample. The target protein BRAF was immunoprecipitated using magnetic beads in a pneumatic micromixer. Purified protein was then eluted and digested by trypsin in another two micromixers to yield peptide fragments in the solution. Using stable isotope-labeled standard as the internal control, wild-type and mutant BRAF proteins were quantified using mass spectrometry, which could be used for cancer screening. Compared with conventional methods in which protein immunoprecipitation lasts overnight, the micromixer procedure takes only 1 h, likely improving the throughput of mutant BRAF protein quantification by mass spectrometry. Graphical abstract Three micromixers were used to reduce the sample pretreatment time of cell extracts for target protein quantification by mass spectrometers, including protein immunoprecipitation, protein elution, and protein enzymatic digestion.
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Son H, Ku J, Kim Y, Li S, Char K. Amine-Reactive Poly(pentafluorophenyl acrylate) Brush Platforms for Cleaner Protein Purification. Biomacromolecules 2018; 19:951-961. [DOI: 10.1021/acs.biomac.7b01736] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Hyunjoo Son
- The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Korea
| | | | | | | | - Kookheon Char
- The National Creative Research Initiative Center for Intelligent Hybrids, School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Korea
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Li H, Popp R, Borchers CH. Affinity-mass spectrometric technologies for quantitative proteomics in biological fluids. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Rogers AJ, Fast VG, Sethu P. Biomimetic Cardiac Tissue Model Enables the Adaption of Human Induced Pluripotent Stem Cell Cardiomyocytes to Physiological Hemodynamic Loads. Anal Chem 2016; 88:9862-9868. [PMID: 27620367 PMCID: PMC6050012 DOI: 10.1021/acs.analchem.6b03105] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Induced pluripotent stem cell derived cardiomyocytes (iPSC-CMs) provide a human source of cardiomyocytes for use in cardiovascular research and regenerative medicine. However, attempts to use these cells in vivo have resulted in drastic cell death caused by mechanical, metabolic, and/or exogenous factors. To explore this issue, we designed a Biomimetic Cardiac Tissue Model (BCTM) where various parameters associated with heart function including heart rate, peak-systolic pressure, end-diastolic pressure and volume, end-systolic pressure and volume, and ratio of systole to diastole can all be precisely manipulated to apply hemodynamic loading to culture cells. Using the BCTM, two causes of low survivability in current cardiac stem cell therapies, mechanical and metabolic, were explored. iPSC-CMs were subject to physiologically relevant mechanical loading (50 mmHg systolic, 10% biaxial stretch) in either a low- or high-serum environment and mechanical loads were applied either immediately or gradually. Results confirm that iPSC-CMs subject to mechanical loading in low-serum conditions experienced widespread cell death. The rate of application of stress also played an important role in adaptability to mechanical loading. Under high-serum conditions, iPSC-CMs subject to gradual imposition of stress were comparable to iPSC-CMs maintained in static culture when evaluated in terms of cell viability, sarcomeric structure, action potentials and conduction velocities. In contrast, iPSC-CMs that were immediately exposed to mechanical loading had significantly lower cell viability, destruction of sarcomeres, smaller action potentials, and lower conduction velocities. We report that iPSC-CMs survival under physiologically relevant hemodynamic stress requires gradual imposition of mechanical loads in a nutrient-rich environment.
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Affiliation(s)
- Aaron J. Rogers
- Division of Cardiovascular Disease, Department of Medicine,
University of Alabama at Birmingham, Birmingham, AL
- Department of Biomedical Engineering, School of
Engineering, University of Alabama at Birmingham, Birmingham, AL
| | - Vladimir G. Fast
- Division of Cardiovascular Disease, Department of Medicine,
University of Alabama at Birmingham, Birmingham, AL
| | - Palaniappan Sethu
- Division of Cardiovascular Disease, Department of Medicine,
University of Alabama at Birmingham, Birmingham, AL
- Department of Biomedical Engineering, School of
Engineering, University of Alabama at Birmingham, Birmingham, AL
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Parker SJ, Raedschelders K, Van Eyk JE. Emerging proteomic technologies for elucidating context-dependent cellular signaling events: A big challenge of tiny proportions. Proteomics 2015; 15:1486-502. [PMID: 25545106 DOI: 10.1002/pmic.201400448] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 10/31/2014] [Accepted: 12/23/2014] [Indexed: 12/11/2022]
Abstract
Aberrant cell signaling events either drive or compensate for nearly all pathologies. A thorough description and quantification of maladaptive signaling flux in disease is a critical step in drug development, and complex proteomic approaches can provide valuable mechanistic insights. Traditional proteomics-based signaling analyses rely heavily on in vitro cellular monoculture. The characterization of these simplified systems generates a rich understanding of the basic components and complex interactions of many signaling networks, but they cannot capture the full complexity of the microenvironments in which pathologies are ultimately made manifest. Unfortunately, techniques that can directly interrogate signaling in situ often yield mass-limited starting materials that are incompatible with traditional proteomics workflows. This review provides an overview of established and emerging techniques that are applicable to context-dependent proteomics. Analytical approaches are illustrated through recent proteomics-based studies in which selective sample acquisition strategies preserve context-dependent information, and where the challenge of minimal starting material is met by optimized sensitivity and coverage. This review is organized into three major technological themes: (i) LC methods in line with MS; (ii) antibody-based approaches; (iii) MS imaging with a discussion of data integration and systems modeling. Finally, we conclude with future perspectives and implications of context-dependent proteomics.
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Affiliation(s)
- Sarah J Parker
- Department of Medicine, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, MD, USA; Advanced Clinical Biosystems Research Institute, Los Angeles, CA, USA; Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA; Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Vashist SK, Lam E, Hrapovic S, Male KB, Luong JHT. Immobilization of Antibodies and Enzymes on 3-Aminopropyltriethoxysilane-Functionalized Bioanalytical Platforms for Biosensors and Diagnostics. Chem Rev 2014; 114:11083-130. [DOI: 10.1021/cr5000943] [Citation(s) in RCA: 212] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Sandeep Kumar Vashist
- HSG-IMIT - Institut für Mikro- und Informationstechnik, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
- Laboratory for MEMS Applications, Department of Microsystems Engineering - IMTEK, University of Freiburg, Georges-Koehler-Allee 103, 79110 Freiburg, Germany
| | - Edmond Lam
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | | | - Keith B. Male
- National Research Council Canada, Montreal, Quebec H4P 2R2, Canada
| | - John H. T. Luong
- Innovative Chromatography Group, Irish Separation Science Cluster (ISSC), Department of Chemistry and Analytical, Biological Chemistry Research Facility (ABCRF), University College Cork, Cork, Ireland
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Baratchi S, Khoshmanesh K, Sacristán C, Depoil D, Wlodkowic D, McIntyre P, Mitchell A. Immunology on chip: Promises and opportunities. Biotechnol Adv 2014; 32:333-46. [DOI: 10.1016/j.biotechadv.2013.11.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 11/04/2013] [Accepted: 11/17/2013] [Indexed: 01/09/2023]
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Xia H, Mathew B, John T, Hegab H, Feng J. Microfluidic based immunosensor for detection and purification of carbonylated proteins. Biomed Microdevices 2014; 15:519-30. [PMID: 23471602 DOI: 10.1007/s10544-013-9751-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A microchip has been developed on the basis of immno-precipitation approach for fast and sensitive enrichment of low abundant carbonylated proteins. This microfluidic method could enrich molecular biomarkers, which could be further analyzed in the proteomic study of age-related diseases and therapeutic development. In this study, an immunoaffinity-based PDMS micro-device was designed, fabricated, and chemically modified to specifically trap DNP-labeled PTM proteins of low abundance from a complex protein mixture. Carbonylated protein is selected as a representative PTM protein to illustrate the wide application of this immuno-based microchip for other PTMs which could be readily labeled by different antibody groups. Surface characterization methods such as atomic force microscopy and fluorescence microscopy were used to evaluate the construction of glutaraldehyde- and antibody- terminated PDMS substrates in the device fabrication. Quantitative study was also applied to study the target protein capture and elution efficiency of the device. In a testing mixture consisting of smaller amount of test model-In Vitro oxidized cytochrome c and large blocking protein BSA, a high sensitivity and specificity for only carbonylated protein biomarkers was demonstrated using this on-chip immnuoaffinity based extraction/enrichment. For this highly dense 193-post arrays μ-chip, a low abundance of 159 ng of standard in vitro test model- cytochrome c was enriched at flow speed of 5 μL/min within 110 min. We demonstrated that this nascent micro-immunoprecipitation (μ-IP) method is capable for enrichment of biomarkers in protein post-translation modification related diseases and promise great advance in early disease detection.
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Affiliation(s)
- Hui Xia
- Department of Biomedical Engineering, Louisiana Tech University, Ruston, USA
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Sandison ME, Jensen KT, Gesellchen F, Cooper JM, Pitt AR. Magnetite-doped polydimethylsiloxane (PDMS) for phosphopeptide enrichment. Analyst 2014; 139:4974-81. [DOI: 10.1039/c4an00750f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A moldable, reusable magnetite-doped polydimethylsiloxane (PDMS) substrate for phosphopeptide enrichment.
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Affiliation(s)
- Mairi E. Sandison
- Institute of Molecular
- Cell and Systems Biology
- University of Glasgow
- Glasgow, UK
| | - K. Tveen Jensen
- School of Life and Health Science
- Aston University
- Birmingham, UK
| | - F. Gesellchen
- Division of Biomedical Engineering
- University of Glasgow
- Glasgow, UK
| | - J. M. Cooper
- School of Life and Health Science
- Aston University
- Birmingham, UK
| | - A. R. Pitt
- Division of Biomedical Engineering
- University of Glasgow
- Glasgow, UK
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Kuddannaya S, Chuah YJ, Lee MHA, Menon NV, Kang Y, Zhang Y. Surface chemical modification of poly(dimethylsiloxane) for the enhanced adhesion and proliferation of mesenchymal stem cells. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9777-84. [PMID: 24015724 DOI: 10.1021/am402903e] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The surface chemistry of materials has an interactive influence on cell behavior. The optimal adhesion of mammalian cells is critical in determining the cell viability and proliferation on substrate surfaces. Because of the inherent high hydrophobicity of a poly(dimethylsiloxane) (PDMS) surface, cell culture on these surfaces is unfavorable, causing cells to eventually dislodge from the surface. Although physically adsorbed matrix proteins can promote initial cell adhesion, this effect is usually short-lived. Here, (3-aminopropyl)triethoxy silane (APTES) and cross-linker glutaraldehyde (GA) chemistry was employed to immobilize either fibronectin (FN) or collagen type 1 (C1) on PDMS. The efficiency of these surfaces to support the adhesion and viability of mesenchymal stem cells (MSCs) was analyzed. The hydrophobicity of the native PDMS decreased significantly with the mentioned surface functionalization. The adhesion of MSCs was mostly favorable on chemically modified PDMS surfaces with APTES + GA + protein. Additionally, the spreading area of MSCs was significantly higher on APTES + GA + C1 surfaces than on other unmodified/modified PDMS surfaces with C1 adsorption. However, there were no significant differences in the MSC spreading area on the unmodified/modified PDMS surfaces with FN adsorption. Furthermore, there was a significant increase in cell proliferation on the PDMS surface with APTES + GA + protein functionalization as compared to the PDMS surface with protein adsorption only. Therefore, the covalent surface chemical modification of PDMS with APTES + GA + protein could offer a more biocompatible platform for the enhanced adhesion and proliferation of MSCs. Similar strategies can be applied for other substrates and cell lines by appropriate combinations of self-assembly monolayers (SAMs) and extracellular matrix proteins.
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Affiliation(s)
- Shreyas Kuddannaya
- School of Mechanical & Aerospace Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
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Díaz-González M, Baldi A. Fabrication of Biofunctionalized Microfluidic Structures by Low-Temperature Wax Bonding. Anal Chem 2012; 84:7838-44. [DOI: 10.1021/ac301512f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | - Antoni Baldi
- Instituto de Microelectrónica de Barcelona (IMB-CNM, CSIC), Spain
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Lee CJ, Jung JH, Seo TS. 3D Porous Sol–Gel Matrix Incorporated Microdevice for Effective Large Volume Cell Sample Pretreatment. Anal Chem 2012; 84:4928-34. [DOI: 10.1021/ac3005549] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang J, Liu S, Yang P, Sui G. Rapid detection of algal toxins by microfluidic immunoassay. LAB ON A CHIP 2011; 11:3516-22. [PMID: 21879104 DOI: 10.1039/c1lc20516a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Herein we report fabricating a microfluidic device to monitor harmful algal blooming (HAB). The heterogeneous immuno-enzyme assay was integrated into a self-designed microfluidic chip for rapid and automatic analysis of algal toxins. The device was made from polydimethylsiloxane (PDMS) and was assembled with a home-made control system. The performance of the system was demonstrated by the detection of microcystin, saxitoxin and cylindrospermopsin, the major cyanotoxins. In one single microfluidic chip, multiple samples were controlled and analysed in a parallel manner. Under the optimal conditions, the linear range and the limit of detection of microcystins were 0-5.0 ng mL(-1) and 0.02 ng mL(-1) respectively. The total analysis time was less than 25 min. The designed device was highly automatic, more efficient and economic compared to conventional techniques.
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Affiliation(s)
- Jinling Zhang
- Department of Chemistry, Fudan University, Shanghai, China
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