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Rautsola I, Haapala M, Huttunen L, Korhonen O, Sikanen T. Extending the shelf life of HLM chips through freeze-drying of human liver microsomes immobilized onto thiol-ene micropillar arrays. LAB ON A CHIP 2024; 24:4211-4220. [PMID: 39113596 DOI: 10.1039/d4lc00429a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/21/2024]
Abstract
Microfluidic flow reactors functionalized with immobilized human liver microsomes (HLM chips) represent a powerful tool for drug discovery and development by enabling mechanism-based enzyme inhibition studies under flow-through conditions. Additionally, HLM chips may be exploited in streamlined production of human drug metabolites for subsequent microfluidic in vitro organ models or as metabolite standards for drug safety assessment. However, the limited shelf life of the biofunctionalized microreactors generally poses a major barrier to their commercial adaptation in terms of both storage and shipping. The shelf life of the HLM chips in the wetted state is ca. 2-3 weeks only and requires cold storage at 4 °C. In this study, we developed a freeze-drying method for lyophilization of HLMs that are readily immobilized inside microfluidic pillar arrays made from off-stoichiometric thiol-ene polymer. The success of lyophilization was evaluated by monitoring the cytochrome P450 and UDP-glucuronosyltransferase enzyme activities of rehydrated HLMs for several months post-freeze-drying. By adapting the freeze-drying protocol, the HLM chips could be stored at room temperature (protected from light and moisture) for at least 9 months (n = 2 independent batches) and up to 16 months at best, with recovered enzyme activities within 60-120% of the non-freeze-dried control chips. This is a major improvement over the cold-storage requirement and the limited shelf life of the non-freeze-dried HLM chips, which can significantly ease the design of experiments, decrease energy consumption during storage, and reduce the shipping costs with a view to commercial adaptation.
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Affiliation(s)
- Iiro Rautsola
- Faculty of Pharmacy, Drug Research Program, University of Helsinki, Finland.
| | - Markus Haapala
- Faculty of Pharmacy, Drug Research Program, University of Helsinki, Finland.
| | - Leo Huttunen
- Faculty of Pharmacy, Drug Research Program, University of Helsinki, Finland.
| | - Ossi Korhonen
- Faculty of Health Sciences, School of Pharmacy, University of Eastern Finland, Finland
| | - Tiina Sikanen
- Faculty of Pharmacy, Drug Research Program, University of Helsinki, Finland.
- Helsinki Institute of Sustainability Science, University of Helsinki, Finland
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2
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Naghdi E, Moran GE, Reinau ME, De Malsche W, Neusüß C. Concepts and recent advances in microchip electrophoresis coupled to mass spectrometry: Technologies and applications. Electrophoresis 2023; 44:246-267. [PMID: 35977423 DOI: 10.1002/elps.202200179] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/11/2022] [Accepted: 08/13/2022] [Indexed: 02/01/2023]
Abstract
The online coupling of microchip electrophoresis (ME) as a fast, highly efficient, and low-cost miniaturized separation technique to mass spectrometry (MS) as an information-rich and sensitive characterization technique results in ME-MS an attractive tool for various applications. In this paper, we review the basic concepts and latest advances in technology for ME coupled to MS during the period of 2016-2021, covering microchip materials, structures, fabrication techniques, and interfacing to electrospray ionization (ESI)-MS and matrix-assisted laser desorption/ionization-MS. Two critical issues in coupling ME and ESI-MS include the electrical connection used to define the electrophoretic field strength along the separation channel and the generation of the electrospray for MS detection, as well as, a miniaturized ESI-tip. The recent commercialization of ME-MS in zone electrophoresis and isoelectric focusing modes has led to the widespread application of these techniques in academia and industry. Here we summarize recent applications of ME-MS for the separation and detection of antibodies, proteins, peptides, carbohydrates, metabolites, and so on. Throughout the paper these applications are discussed in the context of benefits and limitations of ME-MS in comparison to alternative techniques.
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Affiliation(s)
- Elahe Naghdi
- Department of Chemistry, Aalen University, Aalen, Germany
| | - Griffin E Moran
- Novo Nordisk A/S, Global Research Technologies, Maaloev, Denmark
| | | | - Wim De Malsche
- µFlow group, Department of Chemical Engineering, Vrije Universiteit Brussel, Brussels, Belgium
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3
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Ben Frej M, d'Orlyé F, Duarte‐Junior GF, Coltro WKT, Varenne A. Electrokinetic characterization of hybrid NOA 81‐glass microchips: Application to protein microchip electrophoresis with indirect fluorescence detection. Electrophoresis 2022; 43:2044-2048. [DOI: 10.1002/elps.202200057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 07/08/2022] [Accepted: 07/15/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Menel Ben Frej
- Institute of Chemistry for Life and Health Sciences i‐CLeHS Chimie ParisTech‐PSL/CNRS 8060 Paris France
| | - Fanny d'Orlyé
- Institute of Chemistry for Life and Health Sciences i‐CLeHS Chimie ParisTech‐PSL/CNRS 8060 Paris France
| | - Gerson F. Duarte‐Junior
- Institute of Chemistry for Life and Health Sciences i‐CLeHS Chimie ParisTech‐PSL/CNRS 8060 Paris France
- Instituto de Química Universidade Federal de Goiás Goiânia Brazil
| | | | - Anne Varenne
- Institute of Chemistry for Life and Health Sciences i‐CLeHS Chimie ParisTech‐PSL/CNRS 8060 Paris France
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4
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Multiple Zones Modification of Open Off-Stoichiometry Thiol-Ene Microchannel by Aptamers: A Methodological Study & A Proof of Concept. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors8020024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Off-stoichiometry thiol-ene polymer (OSTE) is an emerging thermoset with interesting properties for the development of lab-on-a-chip (LOAC), such as easy microfabrication process, suitable surface chemistry for modification and UV-transparency. One of the challenges for LOAC development is the integration of all the analytical steps in one microchannel, and particularly, trace level analytes extraction/preconcentration steps. In this study, two strategies for the immobilization of efficient tools for this purpose, thiol-modified (C3-SH) aptamers, on OSTE polymer surfaces were developed and compared. The first approach relies on a direct UV-initiated click chemistry reaction to graft thiol-terminated aptamers on ene-terminated OSTE surfaces. The second strategy consists of the immobilization of thiol-terminated aptamers onto OSTE substrates covered by gold nanoparticles. The presence of an intermediate gold nanoparticle layer on OSTE has shown great interest in the efficient immobilization of aptamers, preserving their interaction with the target, and preventing non-specific adsorption. With this second innovative strategy, we proved, for the first time the concept of creating multiple functional zones for sample treatment in an open OSTE-microchannel thanks to the immobilization of aptamers in consecutive areas by the simple droplet deposition methodology. This methodological development allows further consideration of OSTE material for lab-on-a-chip designs, integrating multiple zones for sample pretreatment, based on molecular recognition by ligands, such as aptamers, in a specific zone of the microchannel and is adaptable to a large range of analytical applications for LOAC industrialization.
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5
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Sticker D, Geczy R, Häfeli UO, Kutter JP. Thiol-Ene Based Polymers as Versatile Materials for Microfluidic Devices for Life Sciences Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:10080-10095. [PMID: 32048822 DOI: 10.1021/acsami.9b22050] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
While there is a steady growth in the number of microfluidics applications, the search for an optimal material that delivers the diverse characteristics needed for the numerous tasks is still nowhere close to being settled. Often overlooked and still underrepresented, the thiol-ene family of polymer materials has an enormous potential for applications in organs-on-a-chip, droplet productions, microanalytics, and point of care testing. In this review, the main characteristics of the thiol-ene materials are given, and advantages and drawbacks with respect to their potential in microfluidic chip fabrication are critically assessed. Select applications, which exploit the versatility of the thiol-ene polymers, are presented and discussed. It is concluded that, in particular, the rapid prototyping possibility combined with the material's resulting mechanical strength, solvent resistance, and biocompatibility, as well as the inherently easy surface functionalization, are strong factors to make thiol-ene polymers strong contenders for promising future materials for many biological, clinical, and technical lab-on-a-chip applications.
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Affiliation(s)
- Drago Sticker
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Reka Geczy
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Urs O Häfeli
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada
| | - Jörg P Kutter
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen, Denmark
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6
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Abstract
In this work, surface microstructurization was coupled with shape-memory polymer to generate reversibly tunable surface properties. A photopolymerizable thiol-ene composition comprising a mixture of pentaerythritol tetrakis(3-mercaptopropionate) (PETMP), 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT) and 2,2-dimethoxy-2-phenylacetophenone (DMPA) was used to prepare microstructured thiol-ene shape-memory film via casting and UV polymerization on the electron beam lithography fabricated arrays of 1 µm and 2 µm square pits. The mechanical deformation via compression and recovery of the surface microstructure were investigated. Results show that, after heat treatment of the deformed thiol-ene film, the recovery yields for microstructures were not worse than 90% ± 2% and 93% ± 2% for structures imprinted with 1 µm and 2 µm square pit micro imprint stamps. Additionally, heat treatment of deformed thiol-ene film resulted in the recovery of intense diffraction colors and laser diffraction patterns. This study opens up an avenue of incorporating microstructured shape-memory films for new products, e.g., optical security devices, superhydrophobic coatings, medical diagnostics and biosensors.
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Immobilization of proteolytic enzymes on replica-molded thiol-ene micropillar reactors via thiol-gold interaction. Anal Bioanal Chem 2019; 411:2339-2349. [PMID: 30899997 PMCID: PMC6459972 DOI: 10.1007/s00216-019-01674-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/29/2019] [Accepted: 02/05/2019] [Indexed: 12/17/2022]
Abstract
We introduce rapid replica molding of ordered, high-aspect-ratio, thiol-ene micropillar arrays for implementation of microfluidic immobilized enzyme reactors (IMERs). By exploiting the abundance of free surface thiols of off-stoichiometric thiol-ene compositions, we were able to functionalize the native thiol-ene micropillars with gold nanoparticles (GNPs) and these with proteolytic α-chymotrypsin (CHT) via thiol-gold interaction. The micropillar arrays were replicated via PDMS soft lithography, which facilitated thiol-ene curing without the photoinitiators, and thus straightforward bonding and good control over the surface chemistry (number of free surface thiols). The specificity of thiol-gold interaction was demonstrated over allyl-rich thiol-ene surfaces and the robustness of the CHT-IMERs at different flow rates and reaction temperatures using bradykinin hydrolysis as the model reaction. The product conversion rate was shown to increase as a function of decreasing flow rate (increasing residence time) and upon heating of the IMER to physiological temperature. Owing to the effective enzyme immobilization onto the micropillar array by GNPs, no further purification of the reaction solution was required prior to mass spectrometric detection of the bradykinin hydrolysis products and no clogging problems, commonly associated with conventional capillary packings, were observed. The activity of the IMER remained stable for at least 1.5 h (continuous use), suggesting that the developed protocol may provide a robust, new approach to implementation of IMER technology for proteomics research. Graphical abstract.
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8
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Abstract
This manuscript reviews recent developments in click chemistry in microscale systems.
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Affiliation(s)
- Tingting Hong
- Xiangya School of Pharmaceutical Sciences
- Central South University
- Changsha
- China
| | - Wenfang Liu
- Xiangya School of Pharmaceutical Sciences
- Central South University
- Changsha
- China
| | - Ming Li
- School of Environmental Science and Engineering
- Yangzhou University
- Yangzhou
- China
| | - Chuanpin Chen
- Xiangya School of Pharmaceutical Sciences
- Central South University
- Changsha
- China
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9
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Lipponen K, Tähkä S, Sikanen T, Jokinen V, Tatikonda A, Franssila S, Kostiainen R, Kotiaho T. Thiol-ene micropillar array electrospray ionization platform for zeptomole level bioanalysis. Analyst 2018; 142:2552-2557. [PMID: 28617495 DOI: 10.1039/c7an00544j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A micropillar array electrospray ionization (μPESI) platform fabricated from thiol-enes with 56 individual polyethylene glycol coated μPESI chips for bioanalytical mass spectrometry is introduced. Bioanalysis capability is shown by measurement of a protein, a protein digest and a cell lysate sample. The thiol-ene polyethylene glycol (PEG) coated μPESI chip allows the use of a wide range of aqueous-organic solvent compositions and provides a detection limit at 60 zeptomole level (6 × 10-20 mol) for a peptide standard.
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Affiliation(s)
- K Lipponen
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, P.O. Box 56, FI-00014. and University of Helsinki, Finland.
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de Campos RPS, Campos CDM, Almeida GB, da Silva JAF. Characterization of Off-Stoichiometry Microfluidic Devices for Bioanalytical Applications. IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2017; 11:1470-1477. [PMID: 29293428 DOI: 10.1109/tbcas.2017.2759510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this paper, we further investigate the properties of off-stoichiometry thiol-ene polymers (OSTE) aiming its application in microchip electrophoresis for bioanalytical applications. The proportion of 1.3:1 (allyl:thiol) and 1:2.5 (allyl:thiol) presented the best results in terms of sealing. Raman imaging mapping of the polymers surfaces revealed an outstanding homogeneity. Water contact angle were measured as 68° ± 6° and 71° ± 5° for 1.3:1 allyl and 1:2.5 thiol, respectively. Substrates prepared with OSTE demonstrated to be less prone to sorption of nonpolar compounds. The electroosmotic flow measured for this OSTE composition was 3.8 ± 0.3·10-4 cm2 s-1 V-1, 1.5 times higher than the one found for polydimethylsiloxane microchips under the same conditions. As a proof-of-concept for the applicability of OSTE microchips in bioanalysis the immobilization of α-amylase on the polymer surface and the implementation of a Saccharomyces cerevisiae cell counter using contactless conductivity detection are demonstrated.
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11
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Hoffmann C, Chiaula V, Yu L, Pinelo M, Woodley JM, Daugaard AE. Simple Preparation of Thiol-Ene Particles in Glycerol and Surface Functionalization by Thiol-Ene Chemistry (TEC) and Surface Chain Transfer Free Radical Polymerization (SCT-FRP). Macromol Rapid Commun 2017; 39. [DOI: 10.1002/marc.201700394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 08/16/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Christian Hoffmann
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Valeria Chiaula
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Liyun Yu
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Manuel Pinelo
- Department of Chemical and Biochemical Engineering; Center for BioProcess Engineering; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - John M. Woodley
- Department of Chemical and Biochemical Engineering; Process and Systems Engineering Center (PROSYS); Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Anders E. Daugaard
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
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12
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Hoffmann C, Pinelo M, Woodley JM, Daugaard AE. Development of a thiol-ene based screening platform for enzyme immobilization demonstrated using horseradish peroxidase. Biotechnol Prog 2017; 33:1267-1277. [DOI: 10.1002/btpr.2526] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/07/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Christian Hoffmann
- Dept. of Chemical and Biochemical Engineering, Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229, 2800 Kgs, Lyngby Denmark
| | - Manuel Pinelo
- Dept. of Chemical and Biochemical Engineering, Center for BioProcess Engineering; Technical University of Denmark; Søltofts Plads Building 229, 2800 Kgs, Lyngby Denmark
| | - John M. Woodley
- Dept. of Chemical and Biochemical Engineering, Process and Systems Engineering Center (PROSYS); Technical University of Denmark; Søltofts Plads Building 229, 2800 Kgs., Lyngby Denmark
| | - Anders E. Daugaard
- Dept. of Chemical and Biochemical Engineering, Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229, 2800 Kgs, Lyngby Denmark
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13
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Dawod M, Arvin NE, Kennedy RT. Recent advances in protein analysis by capillary and microchip electrophoresis. Analyst 2017; 142:1847-1866. [PMID: 28470231 PMCID: PMC5516626 DOI: 10.1039/c7an00198c] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
This review article describes the significant recent advances in the analysis of proteins by capillary and microchip electrophoresis during the period from mid-2014 to early 2017. This review highlights the progressions, new methodologies, innovative instrumental modifications, and challenges for efficient protein analysis in human specimens, animal tissues, and plant samples. The protein analysis fields covered in this review include analysis of native, reduced, and denatured proteins in addition to Western blotting, protein therapeutics and proteomics.
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Affiliation(s)
- Mohamed Dawod
- Department of Chemistry, University of Michigan, 930 N. University Ave, Ann Arbor, Michigan 48109, USA.
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14
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Tähkä SM, Bonabi A, Jokinen VP, Sikanen TM. Aqueous and non-aqueous microchip electrophoresis with on-chip electrospray ionization mass spectrometry on replica-molded thiol-ene microfluidic devices. J Chromatogr A 2017; 1496:150-156. [PMID: 28347516 DOI: 10.1016/j.chroma.2017.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/03/2017] [Accepted: 03/10/2017] [Indexed: 12/25/2022]
Abstract
This work describes aqueous and non-aqueous capillary electrophoresis on thiol-ene-based microfluidic separation devices that feature fully integrated and sharp electrospray ionization (ESI) emitters. The chip fabrication is based on simple and low-cost replica-molding of thiol-ene polymers under standard laboratory conditions. The mechanical rigidity and the stability of the materials against organic solvents, acids and bases could be tuned by adjusting the respective stoichiometric ratio of the thiol and allyl ("ene") monomers, which allowed us to carry out electrophoresis separation in both aqueous and non-aqueous (methanol- and ethanol-based) background electrolytes. The stability of the ESI signal was generally ≤10% RSD for all emitters. The respective migration time repeatabilities in aqueous and non-aqueous background electrolytes were below 3 and 14% RSD (n=4-6, with internal standard). The analytical performance of the developed thiol-ene microdevices was shown in mass spectrometry (MS) based analysis of peptides, proteins, and small molecules. The theoretical plate numbers were the highest (1.2-2.4×104m-1) in ethanol-based background electrolytes. The ionization efficiency also increased under non-aqueous conditions compared to aqueous background electrolytes. The results show that replica-molding of thiol-enes is a feasible approach for producing ESI microdevices that perform in a stable manner in both aqueous and non-aqueous electrophoresis.
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Affiliation(s)
- Sari M Tähkä
- Faculty of Pharmacy, Drug Research Programme, Viikinkaari 5E, FI-00014, University of Helsinki, Helsinki, Finland.
| | - Ashkan Bonabi
- Faculty of Pharmacy, Drug Research Programme, Viikinkaari 5E, FI-00014, University of Helsinki, Helsinki, Finland.
| | - Ville P Jokinen
- Department of Materials Science and Engineering, School of Chemical Technology, Aalto University, Tietotie 3, FI-00076 Aalto, Espoo, Finland.
| | - Tiina M Sikanen
- Faculty of Pharmacy, Drug Research Programme, Viikinkaari 5E, FI-00014, University of Helsinki, Helsinki, Finland.
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15
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Štěpánová S, Kašička V. Analysis of proteins and peptides by electromigration methods in microchips. J Sep Sci 2016; 40:228-250. [PMID: 27704694 DOI: 10.1002/jssc.201600962] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 09/14/2016] [Accepted: 09/14/2016] [Indexed: 11/07/2022]
Abstract
This review presents the developments and applications of microchip electromigration methods in the separation and analysis of peptides and proteins in the period 2011-mid-2016. The developments in sample preparation and preconcentration, microchannel material, and surface treatment are described. Separations by various microchip electromigration methods (zone electrophoresis in free and sieving media, affinity electrophoresis, isotachophoresis, isoelectric focusing, electrokinetic chromatography, and electrochromatography) are demonstrated. Advances in detection methods are reported and novel applications in the areas of proteomics and peptidomics, quality control of peptide and protein pharmaceuticals, analysis of proteins and peptides in biomatrices, and determination of physicochemical parameters are shown.
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Affiliation(s)
- Sille Štěpánová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
| | - Václav Kašička
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
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16
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A neutral polyacrylate copolymer coating for surface modification of thiol-ene microchannels for improved performance of protein separation by microchip electrophoresis. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-1825-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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