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Yasuda A, Inagawa A, Uehara N. Charge-Selective Aggregation Behavior of Thermoresponsive Polyelectrolytes Having Low Charge Density in Aqueous Solutions of Organic Counterions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1730-1739. [PMID: 36696628 DOI: 10.1021/acs.langmuir.2c02286] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The aggregation behavior of thermoresponsive polyelectrolytes with low charge density in aqueous solutions of organic counterions was investigated. We synthesized two thermoresponsive polyelectrolytes: anionic poly(N-isopropylacrylamide-co-(3-sulfopropyl)acrylamide potassium) (P-NIP-SPAK) and cationic poly(N-isopropylacrylamide-co-(3-acrylamidepropyl)trimethylammonium chloride) (P-NIP-AAPTAC). The polyelectrolytes remained soluble in their aqueous solutions even above the lower critical soluble temperature of P-NIP owing to the strong hydration property of the ionic groups. The aggregation occurred when organic counterions were added to the solution. In these solution systems, the concentration of counterions exceeds those of ionic groups introduced into the polyelectrolytes. The aggregation behavior is attributed to the salting-out effect of counterions accommodated near the polyelectrolyte surface by electrostatic interaction. This aggregation behavior was utilized for the charge-selective recognition of amino acids. P-NIP-SPAK aggregated only when basic amino acids were added under acidic conditions, whereas P-NIP-AAPTAC aggregated only when acidic amino acids were added under basic conditions. The results herein demonstrate that P-NIP-SPAK and P-NIP-AAPTAC have the potential to be used as charge-selective polymer sensors for amino acids without having to strictly control the experimental conditions.
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Affiliation(s)
- Asahi Yasuda
- Faculty of Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi321-8585, Japan
| | - Arinori Inagawa
- Faculty of Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi321-8585, Japan
| | - Nobuo Uehara
- Faculty of Engineering, Utsunomiya University, 7-1-2, Yoto, Utsunomiya, Tochigi321-8585, Japan
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2
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Hiruta Y. Poly(N-isopropylacrylamide)-based temperature- and pH-responsive polymer materials for application in biomedical fields. Polym J 2022. [DOI: 10.1038/s41428-022-00687-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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3
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Nagase K. Thermoresponsive interfaces obtained using poly(N-isopropylacrylamide)-based copolymer for bioseparation and tissue engineering applications. Adv Colloid Interface Sci 2021; 295:102487. [PMID: 34314989 DOI: 10.1016/j.cis.2021.102487] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 07/09/2021] [Accepted: 07/10/2021] [Indexed: 12/11/2022]
Abstract
Poly(N-isopropylacrylamide) (PNIPAAm) is the most well-known and widely used stimuli-responsive polymer in the biomedical field owing to its ability to undergo temperature-dependent hydration and dehydration with temperature variations, causing hydrophilic and hydrophobic alterations. This temperature-dependent property of PNIPAAm provides functionality to interfaces containing PNIPAAm. Notably, the hydrophilic and hydrophobic alterations caused by the change in the temperature-responsive property of PNIPAAm-modified interfaces induce temperature-modulated interactions with biomolecules, proteins, and cells. This intrinsic property of PNIPAAm can be effectively used in various biomedical applications, particularly in bioseparation and tissue engineering applications, owing to the functionality of PNIPAAm-modified interfaces based on the temperature modulation of the interaction between PNIPAAm-modified interfaces and biomolecules and cells. This review focuses on PNIPAAm-modified interfaces in terms of preparation method, properties, and their applications. Advances in PNIPAAm-modified interfaces for existing and developing applications are also summarized.
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Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan.
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4
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Nomoto D, Nagase K, Nakamura Y, Kanazawa H, Citterio D, Hiruta Y. Anion species-triggered antibody separation system utilizing a thermo-responsive polymer column under optimized constant temperature. Colloids Surf B Biointerfaces 2021; 205:111890. [DOI: 10.1016/j.colsurfb.2021.111890] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/29/2021] [Accepted: 05/28/2021] [Indexed: 01/08/2023]
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5
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Maekawa Y, Ayano E, Nagase K, Kanazawa H. Effective Separation for New Therapeutic Modalities Utilizing Temperature-responsive Chromatography. ANAL SCI 2021; 37:651-660. [PMID: 33518586 DOI: 10.2116/analsci.20scr09] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/22/2021] [Indexed: 08/09/2023]
Abstract
In recent years, drug discovery and therapeutics trends have shifted from a focus on small-molecule compounds to biopharmaceuticals, genes, cell therapy, and regenerative medicine. Therefore, new approaches and technologies must be developed to respond to these changes in medical care. To achieve this, we applied a temperature-responsive separation system to purify a variety of proteins and cells. We developed a temperature-responsive chromatography technique based on a poly(N-isopropylacrylamide) (PNIPAAm)-grafted stationary phase. This method may be applied to various types of protein and cell separation applications by optimizing the properties of the modified polymers used in this system. Therefore, the developed temperature-responsive HPLC columns and temperature-responsive solid-phase extraction (TR-SPE) columns can be an effective separation tool for new therapeutic modalities such as monoclonal antibodies, nucleic acid drugs, and cells.
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Affiliation(s)
- Yutaro Maekawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Eri Ayano
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
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Matsumoto M, Asoh TA, Shoji T, Tsuboi Y. Formation of Single Double-Layered Coacervate of Poly( N,N-diethylacrylamide) in Water by a Laser Tweezer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:2874-2883. [PMID: 33616404 DOI: 10.1021/acs.langmuir.0c03009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We demonstrate liquid-liquid phase separation involving both coacervation and coil-to-globule phase transition of a thermoresponsive polymer. By focusing a near-infrared laser beam into an aqueous solution of poly(N-isopropylacrylamide) (PNIPAM), a single phase-separated polymer microdroplet can be formed and stably trapped at the focal point. Such droplet formation is induced by a local elevation in temperature (induced by a photothermal effect) and an optical force. The technique allows us to selectively analyze a single polymer droplet trapped at the focal point. In this study, we applied this technique to poly(N,N-diethylacrylamide) (PDEA) in water and generated a double-layered PDEA droplet. Such an inhomogeneous and complex microstructure has not been previously observed both in steady-state heating of a PDEA solution and in the PNIPAM system. Moreover, we used micro-Raman spectroscopy to clarify that PDEA underwent dehydration due to a coil-to-globule phase transition. Despite this, the polymer concentration (Cpoly) of the trapped PDEA droplet was very low and was around 30 wt %. Cpoly depended on the molecular weight of PDEA and the laser power that regulates the temperature elevation. These results strongly indicate that PDEA undergoes coacervation in addition to a coil-to-globule phase transition. This study will help provide us with a fundamental understanding of the phase separation mechanisms of thermoresponsive polymers.
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Affiliation(s)
- Mitsuhiro Matsumoto
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Taka-Aki Asoh
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Tatsuya Shoji
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
- The Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, 3-3-138, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Yasuyuki Tsuboi
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
- The Osaka City University Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, 3-3-138, Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
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7
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Tan S, Boysen RI, Saito K, Hearn MT. Dynamic adsorption/desorption of proteins with thermo-responsive polymer grafted sepharose fast flow sorbents. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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8
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Tan S, Saito K, Hearn MTW. Adsorption of a Humanized Monoclonal Antibody onto Thermoresponsive Copolymer-Grafted Sepharose Fast Flow Sorbents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1054-1061. [PMID: 33448225 DOI: 10.1021/acs.langmuir.0c02675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The batch adsorption behavior of a humanized monoclonal antibody (hIgG2 mAb) with thermoresponsive polymer (TRP)-modified Sepharose Fast Flow sorbents with different compositions of grafted copolymers is described. At high protein loadings, the adsorption with negatively charged copolymer-modified sorbents exhibited S-shaped isotherms in most cases, indicative of unrestricted multilayer adsorption. The adsorption capacity of the negatively charged copolymer-modified sorbents increased with an increase in the applied environmental temperature due to increased protein-sorbent surface hydrophobic and electrostatic interactions. The affinity of the hIgG2 mAb for a positively charged copolymer-grafted sorbent was much lower than that found for the negatively charged copolymer-grafted sorbents at both 20 and 50 °C due to electrostatic repulsive effects. This study has documented that the molecular functionalities of the grafted copolymer can significantly affect the adsorption behavior of this humanized mAb at both 20 and 50 °C with the isothermal dependencies revealing subtle effects due to copolymer composition.
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Affiliation(s)
- Sinuo Tan
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Kei Saito
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Milton T W Hearn
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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9
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Nagase K, Kanazawa H. Temperature-responsive chromatography for bioseparations: A review. Anal Chim Acta 2020; 1138:191-212. [DOI: 10.1016/j.aca.2020.07.075] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 02/07/2023]
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10
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Fabrication of Carbon-Like, π-Conjugated Organic Layer on a Nano-Porous Silica Surface. NANOMATERIALS 2020; 10:nano10091882. [PMID: 32962263 PMCID: PMC7558701 DOI: 10.3390/nano10091882] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 12/28/2022]
Abstract
This paper presents a new type of black organic material-porous silica composite providing an extremely highly selective adsorption surface. This black composite was prepared by lamination on nano-sized pores with a carbon-like, π-extended structure, which can be converted via the on-site polymerization of 1,5-dihydroxynaphthalene with a triazinane derivative and a thermally induced condensation reaction with denitrification. This bottom-up fabrication method on porous materials had the great advantage of maintaining the pore characteristics of a raw porous material, but also the resultant black surface exhibited an extremely high molecular-shape selectivity; for example, that for trans- and cis-stilbenes reached 14.0 with the black layer-laminated porous silica, whereas it was below 1.2 with simple hydrophobized silica.
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11
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Biswas CS, Biswas A, Galluzzi M, Shekh MI, Wang Q, Ray B, Maiti P, Stadler FJ. Synthesis and characterization of novel amphiphilic biocompatible block-copolymers of poly(N-isopropylacrylamide)-b-poly(l-phenylalanine methyl ester) by RAFT polymerization. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122760] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Baert M, Wicht K, Hou Z, Szucs R, Prez FD, Lynen F. Exploration of the Selectivity and Retention Behavior of Alternative Polyacrylamides in Temperature Responsive Liquid Chromatography. Anal Chem 2020; 92:9815-9822. [PMID: 32598128 DOI: 10.1021/acs.analchem.0c01321] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Temperature responsive liquid chromatography (TRLC) allows for separation of organic solutes in purely aqueous mobile phases whereby retention is controlled through temperature. The vast majority of the work has thus far been performed on poly[N-isopropylacrylamide] (PNIPAAm)-based columns, while the performance of other temperature responsive polymers has rarely been compared under identical conditions. Therefore, in this work, two novel TRLC phases based on poly[N-n-propylacrylamide] (PNNPAAm) and poly[N,N-diethylacrylamide] (PDEAAm) are reported and compared to the state of the art PNIPAAm based column. Optimal comparison is thereby obtained by the use of controlled radical polymerizations, identical molecular weights, and by maximizing carbon loads on the silica supporting material. Analysis of identical test mixtures of homologue series and pharmaceutical samples revealed that PNNPAAm performs in a similar way as PNIPAAm while offering enhanced retention and a shift of the useable temperature range toward lower temperatures. PDEAAm offers a range of novel possibilities as it depicts a different selectivity, allowing for enhanced resolution in TRLC in, for example, coupled column systems. Reduced plate heights of 3 could be obtained on the homemade columns, offering the promise for reasonable column efficiencies in TRLC despite the use of bulky polymers as stationary phases in HPLC.
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Affiliation(s)
- Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Zhanyao Hou
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Roman Szucs
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Filip Du Prez
- Polymer Chemistry Research Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4bis, B-9000 Ghent, Belgium
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13
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Maekawa Y, Okamoto N, Okada Y, Nagase K, Kanazawa H. Green analytical method for the simultaneous analysis of cytochrome P450 probe substrates by poly(N-isopropylacrylamide)-based temperature-responsive chromatography. Sci Rep 2020; 10:8828. [PMID: 32483226 PMCID: PMC7264224 DOI: 10.1038/s41598-020-65270-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 04/28/2020] [Indexed: 02/07/2023] Open
Abstract
High-performance liquid chromatography (HPLC) is the most common analytical method practiced in various fields and used for analysis of almost all drug compounds in the pharmaceutical industries. During drug development, an evaluation of potential drug interaction with cytochrome P450 (CYP) is essential. A "cocktail" approach is often used in drug development to evaluate the effect of a drug candidate on multiple CYP enzymes in a single experiment. So far, simultaneous analysis of multiple CYP substrates, which have greatly different structure and physicochemical properties, has required organic solvents and mobile phase gradient methods. However, despite the recent emphasis on environmental protection, analytical methods that use only aqueous solvents without the use of organic solvents for separation have not been studied well. This study sought to develop the simultaneous analysis of multiple CYP substrates by using poly(N-isopropylacrylamide) (PNIPAAm)-based temperature-responsive chromatography with only aqueous solvents and isocratic methods. Good separation of multiple CYP substrates was achieved without using organic solvents and any gradient methods by temperature-responsive chromatography utilizing a P(NIPAAm-co-n-butyl methacrylate (BMA))- and P(NIPAAm-co-N-acryloyl L-tryptophan methyl ester (L-Trp-OMe))-grafted silica column. Overall, PNIPAAm-based temperature-responsive chromatography represents a remarkably simple, versatile, and environmentally friendly bioanalytical method for CYP substrates and their metabolites.
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Affiliation(s)
- Yutaro Maekawa
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Naoya Okamoto
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Yuji Okada
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo, 105-8512, Japan.
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Bremer PL, De Boer D, Alvarado W, Martinez X, Sorin EJ. Overcoming the Heuristic Nature of k-Means Clustering: Identification and Characterization of Binding Modes from Simulations of Molecular Recognition Complexes. J Chem Inf Model 2020; 60:3081-3092. [PMID: 32383869 DOI: 10.1021/acs.jcim.9b01137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The accurate and reproducible detection and description of thermodynamic states in computational data is a nontrivial problem, particularly when the number of states is unknown a priori and for large, flexible chemical systems and complexes. To this end, we report a novel clustering protocol that combines high-resolution structural representation, brute-force repeat clustering, and optimization of clustering statistics to reproducibly identify the number of clusters present in a data set (k) for simulated ensembles of butyrylcholinesterase in complex with two previously studied organophosphate inhibitors. Each structure within our simulated ensembles was depicted as a high-dimensionality vector with components defined by specific protein-inhibitor contacts at the chemical group level and the magnitudes of these components defined by their respective extents of pair-wise atomic contact, thus allowing for algorithmic differentiation between varying degrees of interaction. These surface-weighted interaction fingerprints were tabulated for each of over 1 million structures from more than 100 μs of all-atom molecular dynamics simulation per complex and used as the input for repetitive k-means clustering. Minimization of cluster population variance and range afforded accurate and reproducible identification of k, thereby allowing for the characterization of discrete binding modes from molecular simulation data in the form of contact tables that concisely encapsulate the observed intermolecular contact motifs. While the protocol presented herein to determine k and achieve non-heuristic clustering is demonstrated on data from massive atomistic simulation, our approach is generalizable to other data types and clustering algorithms, and is tractable with limited computational resources.
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15
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A novel double polymer modified hydrophobic/hydrophilic stationary phase for liquid chromatography. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.08.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Sun W, Dai R, Li B, Dai G, Wang D, Yang D, Chu P, Deng Y, Luo A. Combination of Three Functionalized Temperature-Sensitive Chromatographic Materials for Serum Protein Analysis. Molecules 2019; 24:E2626. [PMID: 31330945 PMCID: PMC6680567 DOI: 10.3390/molecules24142626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/15/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022] Open
Abstract
We have developed a methodology to capture acidic proteins, alkaline proteins, and glycoproteins separately in mouse serum using a combination of three functionalized temperature-responsive chromatographic stationary phases. The temperature-responsive polymer poly(N-isopropylacrylamide) was attached to the stationary phase, silica. The three temperature-responsive chromatographic stationary phase materials were prepared by reversible addition-fragmentation chain transfer polymerization. Alkaline, acidic, and boric acid functional groups were introduced to capture acidic proteins, alkaline proteins, and glycoproteins, respectively. The protein enrichment and release properties of the materials were examined using the acidic protein, bovine serum albumin; the alkaline protein, protamine; and the glycoprotein, horseradish peroxidase. Finally, the three materials were used to analyze mouse serum. Without switching the mobile phase, the capture and separation of mouse serum was achieved by the combination of three temperature-responsive chromatographic stationary phase materials. On the whole, 313 proteins were identified successfully. The number of different proteins identified using the new method was 1.46 times greater than the number of proteins that has been identified without applying this method. To our knowledge, this method is the first combinatorial use of three functionalized temperature-responsive chromatographic stationary phase silica materials to separate proteins in mouse serum.
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Affiliation(s)
- Weiwei Sun
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Rongji Dai
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Bo Li
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
| | - Guoxin Dai
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Di Wang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Dandan Yang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Pingping Chu
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China
| | - Yulin Deng
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China.
| | - Aiqin Luo
- School of Life Science, Beijing Institute of Technology, Beijing 100081, China.
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17
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Tang L, Gong L, Zhou G, Liu L, Zhang D, Tang J, Zheng J. Design of low temperature-responsive hydrogels used as a temperature indicator. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.04.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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18
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Lazzari F, Manfredi A, Alongi J, Marinotto D, Ferruti P, Ranucci E. d-, l- and d,l-Tryptophan-Based Polyamidoamino Acids: pH-Dependent Structuring and Fluorescent Properties. Polymers (Basel) 2019; 11:E543. [PMID: 30960527 PMCID: PMC6473350 DOI: 10.3390/polym11030543] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/19/2019] [Accepted: 03/20/2019] [Indexed: 12/29/2022] Open
Abstract
Chiral polyamidoamino acids were obtained by polyaddition of N,N'-methylenebisacrylamide with d-, d,l- and l-tryptophan (M-d-Trp, M-d,l-Trp and M-l-Trp). l-tryptophan/glycine copolymers, M-G-l-Trp₅, M-G-l-Trp10, M-G-l-Trp20 and M-G-l-Trp40, were prepared from l-tryptophan/glycine mixtures. These polymers were amphoteric, with acid-base properties similar to those of the parent amino acids. The l-tryptophan/glycine copolymers with high glycine content were water soluble in the pH range 2-12. M-G-l-Trp40 showed a solubility gap centred at pH 4.5 and all tryptophan homopolymers were soluble only at pH > 7. Dynamic light scattering measurements performed in their solubility ranges, namely 2-11 M-G-l-Trp₅, M-G-l-Trp10 and M-G-l-Trp20 and 7-11 for M-G-l-Trp40, M-d-Trp, M-l-Trp and M-d,l-Trp, showed that the size of all samples did not significantly vary with pH. Both M-l-Trp and M-G-l-Trp copolymers showed pH-dependent circular dichroism spectra in the wavelength interval 200⁻280 nm, revealing structuring. All samples were fluorescent. Their emission spectra were unstructured and, if normalized for their tryptophan content, almost superimposable at the same pH, providing evidence that only tryptophan governed the photoluminescence properties. Changing pH induced in all cases a slight shift of the emission wavelength maximum ascribed to the modification of the microenvironment surrounding the indole ring induced by different protonation degrees.
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Affiliation(s)
- Federica Lazzari
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy.
| | - Amedea Manfredi
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy.
| | - Jenny Alongi
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy.
| | - Daniele Marinotto
- Istituto di Scienze e Tecnologie Molecolari (ISTM-CNR), via C. Golgi 19, 20133 Milano, Italy.
| | - Paolo Ferruti
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy.
| | - Elisabetta Ranucci
- Dipartimento di Chimica, Università degli Studi di Milano, via C. Golgi 19, 20133 Milano, Italy.
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19
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Okubo K, Ikeda K, Oaku A, Hiruta Y, Nagase K, Kanazawa H. Protein purification using solid-phase extraction on temperature-responsive hydrogel-modified silica beads. J Chromatogr A 2018; 1568:38-48. [DOI: 10.1016/j.chroma.2018.07.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/02/2018] [Accepted: 07/05/2018] [Indexed: 12/01/2022]
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Baert M, Martens S, Desmet G, de Villiers A, Du Prez F, Lynen F. Enhancing the Possibilities of Comprehensive Two-Dimensional Liquid Chromatography through Hyphenation of Purely Aqueous Temperature-Responsive and Reversed-Phase Liquid Chromatography. Anal Chem 2018; 90:4961-4967. [PMID: 29551061 DOI: 10.1021/acs.analchem.7b04914] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Comprehensive two-dimensional liquid chromatography (LC × LC) allows for substantial gains in theoretical peak capacity in the field of liquid chromatography. However, in practice, theoretical performance is rarely achieved due to a combination of undersampling, orthogonality, and refocusing issues prevalent in many LC × LC applications. This is intricately linked to the column dimensions, flow rates, and mobile-phase compositions used, where, in many cases, incompatible or strong solvents are introduced in the second-dimension (2D) column, leading to peak broadening and the need for more complex interfacing approaches. In this contribution, the combination of temperature-responsive (TR) and reversed-phase (RP) LC is demonstrated, which, due to the purely aqueous mobile phase used in TRLC, allows for complete and more generic refocusing of organic solutes prior to the second-dimension RP separation using a conventional 10-port valve interface. Thus far, this was only possible when combining other purely aqueous modes such as ion exchange or gel filtration chromatography with RPLC, techniques which are limited to the analysis of charged or high MW solutes, respectively. This novel TRLC × RPLC combination relaxes undersampling constraints and complete refocusing and therefore offers novel possibilities in the field of LC × LC including temperature modulation. The concept is illustrated through the TRLC × RPLC analysis of mixtures of neutral organic solutes.
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Affiliation(s)
| | | | - Gert Desmet
- Department of Chemical Engineering , Vrije Universiteit Brussel , Pleinlaan 2 , 1050 Brussel , Belgium
| | - André de Villiers
- Department of Chemistry and Polymer Science , Stellenbosch University , Private Bag X1 , Matieland, Stellenbosch 7602 , South Africa
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Enhancement of Thermal Stability and Selectivity by Introducing Aminotriazine Comonomer to Poly(Octadecyl Acrylate)-Grafted Silica as Chromatography Matrix. SEPARATIONS 2018. [DOI: 10.3390/separations5010015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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22
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YAMANOUCHI T, KATSUYAMA N, HIRUTA Y, AYANO E, KANAZAWA H. Development of Nanocarriers Functionalized with Stimuli-Responsive Polymer for Controlled Cellular Uptake. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2017-0064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Yuki HIRUTA
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University
| | - Eri AYANO
- Faculty of Pharmacy, Keio University
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Noguchi H, Liu T, Nozato S, Kuwahara Y, Takafuji M, Nagaoka S, Ihara H. Novel Black Organic Phase for Ultra Selective Retention by Surface Modification of Porous Silica. CHEM LETT 2017. [DOI: 10.1246/cl.170449] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroki Noguchi
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Tianhang Liu
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Shoji Nozato
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Yutaka Kuwahara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
| | - Makoto Takafuji
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
| | - Shoji Nagaoka
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
- Materials and Regional Resources Laboratory, Kumamoto Industrial Research Institute, 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
| | - Hirotaka Ihara
- Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555
- Kumamoto Institute for Photo-Electro Organics (PHOENICS), 3-11-38 Higashimachi, Higashi-ku, Kumamoto 862-0901
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Hiruta Y, Nemoto R, Kanazawa H. Design and synthesis of temperature-responsive polymer/silica hybrid nanoparticles and application to thermally controlled cellular uptake. Colloids Surf B Biointerfaces 2017; 153:2-9. [DOI: 10.1016/j.colsurfb.2017.01.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 01/30/2017] [Accepted: 01/31/2017] [Indexed: 01/07/2023]
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Fujimoto T, Ito M, Ito S, Kanazawa H. Fractional laser-assisted percutaneous drug delivery via temperature-responsive liposomes. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:679-689. [PMID: 28277004 DOI: 10.1080/09205063.2017.1296346] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Liposomes are used for transdermal delivery of drugs and vaccines. Our objective was to develop temperature-responsive (TR) liposomes to achieve temperature-dependent, controlled release of an encapsulated drug, and use fractional laser irradiation to enhance transdermal permeability of these liposomes. TR-liposomes prepared using a thermosensitive polymer derived from poly-N-isopropylacrylamide, N,N-dimethylacrylamide, egg phosphatidylcholine, and dioleoylphosphatidylethanolamine, delivered fluorescein isothiocyanate-conjugated ovalbumin (OVA-FITC) as a model drug. Effect of temperature on liposome size and drug release rate was estimated at two temperatures. Transdermal permeation through hairless mouse skin, with and without CO2 fractional laser irradiation, and penetration into Yucatan micro-pig skin were investigated using Franz cell and fluorescence microscopy. Dynamic light scattering showed that mean liposome diameter nearly doubled from 190 to 325 nm between 37 and 50 °C. The rate and amount of OVA-FITC released from TR-liposomes were higher at 45 °C that those at 37 °C. Transdermal permeation of OVA-FITC across non-irradiated skin from both TR- and unmodified liposomes was minimal at 37 °C, but increased at 45 °C. Laser irradiation significantly increased transdermal permeation of both liposome groups at both temperatures. Fluorescence microscopy of frozen biopsy specimens showed deeper penetration of FITC from unmodified liposomes compared to that from polymer-modified liposomes. Rhodamine accumulation was not observed with polymer-modified liposomes at either temperature. Temperature-dependent controlled release of an encapsulated drug was achieved using the TR-liposomes. However, TR-liposomes showed lower skin permeability despite higher hydrophobicity. Fractional laser irradiation significantly increased the transdermal permeation. Additional studies are required to control liposome size and optimize transdermal permeation properties.
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Affiliation(s)
- Takahiro Fujimoto
- a Clinic F , Tokyo , Japan.,b Faculty of Pharmacy , Keio University , Tokyo , Japan
| | - Masayuki Ito
- c Vitamin C60 Bioresearch Corporation , Tokyo , Japan
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Borghei YS, Hosseini M, Khoobi M, Ganjali MR. Copper nanocluster-enhanced luminol chemiluminescence for high-selectivity sensing of tryptophan and phenylalanine. LUMINESCENCE 2017; 32:1045-1050. [DOI: 10.1002/bio.3289] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 11/22/2016] [Accepted: 01/02/2017] [Indexed: 11/09/2022]
Affiliation(s)
| | - Morteza Hosseini
- Department of Life Science Engineering; University of Tehran; Tehran Iran
- Medical Biomaterials Research Center; Tehran University of Medical Sciences; Tehran Iran
| | - Mehdi Khoobi
- Department of Pharmaceutical Biomaterials and Medical Biomaterials Research Center; Tehran University of Medical Sciences; Tehran Iran
- Nanobiomaterials Group, Pharmaceutical Sciences Research Center; Tehran University of Medical Sciences; Tehran Iran
| | - Mohammad Reza Ganjali
- Center of Excellence in Electrochemistry; University of Tehran; Tehran Iran
- Biosensor Research Center, Endocrinology & Metabolism Molecular-Cellular Sciences Institute; Tehran University of Medical Sciences; Tehran Iran
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MIKUMA T, KUROKI T, YOSHIKAWA M, UCHIDA R, HIRUTA Y, KANAZAWA H. Analysis of Psychoactive Drugs by Temperature-Responsive Chromatography. CHROMATOGRAPHY 2017. [DOI: 10.15583/jpchrom.2017.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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The use of a temperature-responsive column for the direct analysis of drugs in serum by two-dimensional heart-cutting liquid chromatography. Anal Bioanal Chem 2016; 409:1059-1065. [PMID: 27796461 DOI: 10.1007/s00216-016-0024-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 10/08/2016] [Accepted: 10/10/2016] [Indexed: 10/20/2022]
Abstract
A novel pretreatment method, which was performed using a two-dimensional high-performance liquid chromatography (2D-HPLC) system, was proposed for the direct analysis of drugs in human serum. A temperature-responsive column was used as a pretreatment column. The stationary phase of the temperature-responsive column exhibits temperature-regulated hydrophilic/hydrophobic characteristics. Controlling the ionic strength of the eluent enables human serum albumin (HSA) to pass through the column without retention. When serum samples containing barbiturates or benzodiazepines were injected into the temperature-responsive column using 10 mM of ammonium acetate (pH 6.5) as the mobile phase and in the temperature range of 10-40 °C, HSA was eluted from the column near the dead time, followed by the individual drugs. When the column temperature was changed, the retention times of the drugs were altered owing to surface property changes within the pretreatment column. These closely eluted compounds were subsequently introduced into the analytical column using a column-switching valve, with a minimal gap time to avoid foreign substance contamination. This new 2D-HPLC method afforded high-quality chromatograms of multiple drugs without unwanted peaks from foreign substances. The present technique could be an attractive choice in selecting the analytical method for drug analysis.
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Nagase K, Okano T. Thermoresponsive-polymer-based materials for temperature-modulated bioanalysis and bioseparations. J Mater Chem B 2016; 4:6381-6397. [DOI: 10.1039/c6tb01003b] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In this review, bioseparations using thermoresponsive polymers are summarized. Thermoresponsive chromatography for separating bioactive compounds and proteins, and cell separations using thermoresponsive polymers and their properties are reviewed.
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Affiliation(s)
- Kenichi Nagase
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University
- TWIns
- Tokyo 162-8666
- Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University
- TWIns
- Tokyo 162-8666
- Japan
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