1
|
Ampe A, Bandini E, Broeckhoven K, Lynen F. On-column modification for the creation of temperature-responsive stationary phases. Anal Chim Acta 2023; 1283:341961. [PMID: 37977785 DOI: 10.1016/j.aca.2023.341961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/19/2023]
Abstract
Temperature-responsive liquid chromatography (TRLC) offers an alternative for retention and selectivity optimisation in HPLC. This approach thereby exploits temperature gradients on stimuli-responsive stationary phases and forfeits the necessity for solvent gradients, allowing analyses to be performed using aqueous mobile phases. Consequently, it can be employed as a green alternative to reversed-phase separations. However, current production to obtain temperature-responsive columns inherently require dedicated column packing processes with polymer-modified particles. To facilitate the development of temperature-responsive phases, a flow-through modification procedure was developed allowing on-column modification of aminopropyl silica columns. Three columns were manufactured using this novel flow-through approach, which achieved identical column efficiencies compared to existing TRLC column. Demonstrating the possibility of bypassing the dedicated packing processes without losing efficiency. Additionally, it was observed that flow-through produced columns yielded higher retention at elevated temperatures despite their reduced carbon load. Further investigation of the carbon load revealed the presence of stationary phase gradients, whose influence was studied via novel developed retention experiments, which revealed a negligible change reduction in retention upon a change of polymer modification from 19.8% to 14.5%. However, further decrease from 14.5% to 12.3% resulted in a larger change. Interestingly, a further enhancement in apparent plate numbers was observed when operating the column under a reversed flow, yielding an increasing stationary phase gradient. This on-column modification procedure demonstrates the potential for modification of existing (commercial) packed columns to achieve temperature-responsive phases without loss of efficiency or retention. Thus, not only facilitating accessibility to temperature-responsive phases, but also aiding with development of further generations of temperature-responsive phases by removing the need for packing optimisation. Additionally, a novel experiment was set up to easily investigate the effect of inhomogeneous stationary phases retention.
Collapse
Affiliation(s)
- Adriaan Ampe
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Krijgslaan 281, Ghent, Belgium
| | - Elena Bandini
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Krijgslaan 281, Ghent, Belgium
| | - Ken Broeckhoven
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, Brussel, Belgium
| | - Frédéric Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Krijgslaan 281, Ghent, Belgium.
| |
Collapse
|
2
|
Van Kien N, Jeong YH, Seog DJH, Ryoo JJ. Mechanistic study of ultrasound-assisted chromatography using plastic and stainless steel columns. J Chromatogr A 2023; 1710:464402. [PMID: 37797422 DOI: 10.1016/j.chroma.2023.464402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/01/2023] [Accepted: 09/19/2023] [Indexed: 10/07/2023]
Abstract
Based on the previous ultrasound-assisted chromatography (UAC) studies on plastic and stainless steel (SS) columns, this study explores the UAC mechanism by comparatively analyzing ultrasound effects on plastic and SS columns with C18 stationary phase when separating a mixture of polycyclic aromatic hydrocarbons (PAHs) under various ultrasound intensities. The results showed a substantial difference in H values between the PEEK and SS columns under the influence of ultrasound agitation. Specifically, for the pyrene peak, as the ultrasonic intensity increased from 0% to 100% of 900 W, the H values of the SS column slightly rose from 8.82 μm to 9.86 μm. Conversely, the corresponding values for the PEEK column exhibited a significant 12-fold increase from 11.5 μm to 134 μm. The findings demonstrated poor penetration of ultrasound energy through the SS column, and the temperature rise of the medium induced by the ultrasound was the primary contributing factor to PAH separation. However, ultrasound easily penetrated through the plastic column, resulting in acoustic cavitation within the C18 polyether ether ketone (PEEK) column. Cavitation induced heat generation and contributed to a decrease in retention time and the magnitude of peak broadening or distortion, depending on the specific ultrasonic energy. Based on the estimated change in inlet temperature of the PEEK column due to an acoustic effect, the comparison with temperature effects under non-sonic conditions consistently demonstrated a stronger acoustic effect in reducing the retention time, by 2-9%, depending on specific peaks and pairs. We revisited the previously described separation mechanism of ultrasound-assisted ion chromatography and conjoined with our findings to infer and establish a thorough explanation for the previously unexplained separation mechanism of chiral separation and size exclusion chromatography by UAC using SS columns.
Collapse
Affiliation(s)
- Nguyen Van Kien
- Department of Chemistry Education, Kyungpook National University, Daegu, 702-701, the Republic of Korea South Korea
| | - Young Han Jeong
- Department of Chemistry Education, Kyungpook National University, Daegu, 702-701, the Republic of Korea South Korea
| | - David Jin Han Seog
- Department of Chemistry Education, Kyungpook National University, Daegu, 702-701, the Republic of Korea South Korea
| | - Jae Jeong Ryoo
- Department of Chemistry Education, Kyungpook National University, Daegu, 702-701, the Republic of Korea South Korea.
| |
Collapse
|
3
|
Akimoto AM, Ohta Y, Koizumi Y, Ishii T, Endo M, Enomoto T, Nishimoto T, Yoshida R. A surface-grafted hydrogel demonstrating thermoresponsive adhesive strength change. SOFT MATTER 2023; 19:3249-3252. [PMID: 37099019 DOI: 10.1039/d3sm00397c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Here, we designed a surface-grafted hydrogel (SG gel) that exhibits thermoresponsive changes in surface properties. Quantitative measurements using a self-made device showed that the adhesive strength between the SG gel surface and a Bakelite plate due to hydrophobic interaction changed significantly with temperature.
Collapse
Affiliation(s)
- Aya M Akimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yuji Ohta
- Faculty of Core Research Natural Science Division, Ochanomizu University, 2-1-1 Otsuka, Bunkyo-ku, Tokyo 112-8610, Japan
| | - Yuki Koizumi
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Taichi Ishii
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Masaru Endo
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Takafumi Enomoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Taihei Nishimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Ryo Yoshida
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| |
Collapse
|
4
|
Han Jeong Y, Van Kien N, Jin Han Seog D, Ryoo JJ. Comparison between the use of polyether ether ketone and stainless steel columns for ultrasonic-assisted extraction under various ultrasonic conditions. ULTRASONICS SONOCHEMISTRY 2022; 90:106125. [PMID: 36191369 PMCID: PMC9531288 DOI: 10.1016/j.ultsonch.2022.106125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 08/03/2022] [Accepted: 08/13/2022] [Indexed: 06/16/2023]
Abstract
The ultrasound-assisted extraction (UAE) was conducted using the stainless steel (SS) and polyether ether ketone (PEEK) columns and analyzed with high-performance liquid chromatography (HPLC) to understand the mechanism of ultrasound-assisted chromatography (UAC). Empty SS and PEEK columns were used to extract dyes from a fabric under identical conditions with several parameters including the initial ultrasonic bath temperatures (30 °C and 40 °C), ultrasound power intensities (0, 20, 40, 60, 80, and 100 %), ultrasound operation modes (normal and sweep), and ultrasound frequencies (25 kHz, 40 kHz, and 132 kHz) to compare their extraction capabilities. After 30 min of extraction, the amount of extract was determined by HPLC. The PEEK material was significantly affected by ultrasonic radiation compared to the SS material, especially at a higher temperature (40 °C), power intensity (100 %), and frequency (132 kHz) with sweep mode. At a maximum power density of 45 W/L, the extraction effectiveness ratio of PEEK to SS was in the range of 1.8 - 3.9 depending on the specific frequency, initial temperature, and with or without temperature control. The most optimal ultrasound frequencies, in terms of enhancing extraction effectiveness, are in the order of 132 kHz, 40 kHz, and 25 kHz. Unlike the SS material, the PEEK material was more affected by temperature and acoustic effects under identical conditions, especially at 132 kHz ultrasound frequency. In contrast, at lower frequencies of 40 kHz and 25 kHz, no significant differences in the acoustic effects were observed between the PEEK and SS materials. The findings of this study contribute to elucidating the roles of column materials in UAE and UAC.
Collapse
Affiliation(s)
- Young Han Jeong
- Department of Chemistry, Kyungpook National University, Daegu 702-701, South Korea
| | - Nguyen Van Kien
- Department of Chemistry Education, Kyungpook National University, Daegu 702-701, South Korea
| | - David Jin Han Seog
- Science Education Research Institute, Kyungpook National University, Daegu 702-701, South Korea
| | - Jae Jeong Ryoo
- Department of Chemistry Education, Kyungpook National University, Daegu 702-701, South Korea; Science Education Research Institute, Kyungpook National University, Daegu 702-701, South Korea.
| |
Collapse
|
5
|
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]
|
6
|
Lateef S, Ganaie NB, Peerzada GM. Perturbation on dynamics of ferroin-catalyzed Belousov–Zhabotinsky reaction by monomer N-isopropylacrylamide and poly(N-isopropylacrylamide). Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03660-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
7
|
Wicht K, Baert M, Muller M, Bandini E, Schipperges S, von Doehren N, Desmet G, de Villiers A, Lynen F. Comprehensive two-dimensional temperature-responsive × reversed phase liquid chromatography for the analysis of wine phenolics. Talanta 2022; 236:122889. [PMID: 34635268 DOI: 10.1016/j.talanta.2021.122889] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 11/18/2022]
Abstract
Phenolic compounds are an interesting class of natural products because of their proposed contribution to health benefits of foods and beverages and as a bio-source of organic (aromatic) building blocks. Phenolic extracts from natural products are often highly complex and contain compounds covering a broad range in molecular properties. While many 1D-LC and mass spectrometric approaches have been proposed for the analysis of phenolics, this complexity inevitably leads to challenging identification and purification. New insights into the composition of phenolic extracts can be obtained through online comprehensive two-dimensional liquid chromatography (LC × LC) coupled to photodiode array and mass spectrometric detection. However, several practical hurdles must be overcome to achieve high peak capacities and to obtain robust methods with this technique. In many LC × LC configurations, refocusing of analytes at the head of the 2D column is hindered by the high eluotropic strength of the solvent transferred from the 1D to the 2D, leading to peak breakthrough or broadening. LC × LC combinations whereby a purely aqueous mobile phase is used in the 1D and RPLC is used in the 2D are unaffected by these phenomena, leading to more robust methods. In this contribution, the combination of temperature-responsive liquid chromatography (TRLC) with RPLC is used for the first time for the analysis of phenolic extracts of natural origin to illustrate the potential of this alternative combination for natural product analyses. The possibilities of the combination are investigated through analysis of wine extracts by TRLC × RPLC-DAD and TRLC × RPLC-ESI-MS.
Collapse
Affiliation(s)
- Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Magriet Muller
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, ZA-7602, Matieland, South Africa
| | - Elena Bandini
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium
| | - Sonja Schipperges
- Agilent Technologies, Hewlett Packard St 8, D-76337, Waldbronn, Germany
| | - Norwin von Doehren
- Agilent Technologies, Netherlands BV, NL-4330, EA, Middelburg, Netherlands
| | - Gert Desmet
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050, Brussel, Belgium
| | - André de Villiers
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, ZA-7602, Matieland, South Africa
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4, B-9000, Ghent, Belgium.
| |
Collapse
|
8
|
Lateef S, Ganaie NB, Peerzada GM. Novel Routes for the Synthesis of a Thermoresponsive Polymer: A Comparative Approach. ChemistrySelect 2021. [DOI: 10.1002/slct.202103029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shafia Lateef
- Department of Chemistry University of Kashmir Srinagar Jammu and Kashmir 190006 India
| | - Nadeem Bashir Ganaie
- Department of Chemistry Govt. College for Women Nawakadal Srinagar Jammu and Kashmir 190002 India
| | | |
Collapse
|
9
|
Ampe A, Wicht K, Baert M, Broeckhoven K, Lynen F. Investigation of the potential of mixed solvent mobile phases in temperature-responsive liquid chromatography (TRLC). Analyst 2021; 146:6990-6996. [PMID: 34668892 DOI: 10.1039/d1an01684a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Temperature-responsive liquid chromatography (TRLC) allows for extensive retention and selectivity tuning through temperature in HPLC. This is mainly achieved through the use of a stationary phases comprising of a temperature-responsive polymer which undergoes a reversible change from hydrophilic to hydrophobic behaviour upon increasing the temperature. The approach can allow for reversed phase type separations to be achieved with purely aqueous mobile phases, whereby the retention is controlled through temperature instead of mobile phase composition. Despite the promising nature of such form of retention control under isocratic mobile phase conditions, TRLC can suffer from excessive retention of highly apolar solutes even at lower column temperatures whereby the polymer is considered hydrophilic. This is related both to a residual apolarity of the polymer chain and due to the high log P's and low water solubility of higly apolar compounds. While it was known that elution in TRLC doesn't necessarily has to be performed under purely aqueous conditions and that the use of organic co-solvents to the water is possible, the impact thereof on the temperature responsive behaviour itself had not yet been investigated in a systematic way. Therefore in this work the advantages and drawbacks of the use of the organic co-solvents methanol and acetonitrile in TRLC is assessed on two types of temperature reponsive phases: poly-N-N-propylacrylamide (PNNPAAm) and poly-N-isopropylacrylamide (PNIPAAm). The influence of organic co-solvents is investigated with two representative test mixtures (comprising 4 parabens and 5 apolar steroids).
Collapse
Affiliation(s)
- Adriaan Ampe
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Belgium.
| | - Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Belgium.
| | - Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Belgium.
| | - Ken Broeckhoven
- Vrije Universiteit Brussel, Department of Chemical Engineering, Pleinlaan 2, Brussel, Belgium
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Belgium.
| |
Collapse
|
10
|
Baert M, Wicht K, Moussa A, Desmet G, Broeckhoven K, Lynen F. Implementations of temperature gradients in temperature-responsive liquid chromatography. J Chromatogr A 2021; 1654:462425. [PMID: 34425285 DOI: 10.1016/j.chroma.2021.462425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 07/09/2021] [Accepted: 07/13/2021] [Indexed: 11/16/2022]
Abstract
Temperature Responsive Liquid Chromatography (TRLC) offers an alternative and environmentally friendly way to perform reversed-phase like separations. Its use of temperature responsive polymers to control retention based on column temperature, instead of the fraction of organic modifier in the mobile phase mobile, eliminates the need for solvent composition gradients and allows, for example, for purely aqueous separations. In principle this temperature induced retention should allow for gradient elutions to be performed using downward temperature gradients to control retention and refocus the analyte peaks. Yet, the unavailability of dedicated commercial temperature controlling systems allowing suitable temperature control in TRLC limits implementations thereof often to isothermal or step gradient applications. In this work we study the potential of 1) a simple yet programmable water bath and of 2) a modified HPLC system allowing column temperature programming through controlled mixing of a warm and cold mobile phase streams. The performance of both systems was evaluated under both isocratic and gradient applications, resulting in a more thorough understanding of the influence of temperature gradients in TRLC. This knowledge is then applied to a sample of phenolic solutes, illustrating that, although both systems have some flaws, both are able to impose temperature gradients in TRLC resulting in significantly reduced retention and enhanced refocusing of the analyte peak.
Collapse
Affiliation(s)
- Mathijs Baert
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium
| | - Kristina Wicht
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium
| | - Ali Moussa
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Gert Desmet
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Ken Broeckhoven
- Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, Brussel B-1050, Belgium
| | - Frederic Lynen
- Separation Science Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281-S4bis, Ghent B-9000, Belgium.
| |
Collapse
|
11
|
Nagase K, Ishizawa Y, Inoue M, Kokubun M, Yamada S, Kanazawa H. Temperature-responsive spin column for sample preparation using an all-aqueous eluent. Anal Chim Acta 2021; 1179:338806. [PMID: 34535268 DOI: 10.1016/j.aca.2021.338806] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/31/2021] [Accepted: 06/24/2021] [Indexed: 11/21/2022]
Abstract
We present a temperature-responsive spin column using an all-aqueous eluent. The method is intended as a simple sample preparation method for protein removal from serum, which is required for serum drug analysis. As packing materials for the spin column, we prepared two types of silica beads via surface-initiated radical polymerization. The large beads (diameter, 40-63 μm) were grafted with a temperature-responsive cationic copolymer, poly(N-isopropylacrylamide-co-N,N-dimethylaminopropyl acrylamide-co-n-butyl methacrylate) (P(NIPAAm-co-DMAPAAm-co-BMA)), and the small beads (diameter, 5 μm) were grafted with a temperature-responsive hydrophobic copolymer, P(NIPAAm-co-BMA). The beads were packed into the spin column as a double layer: P(NIPAAm-co-BMA) silica beads on the bottom and P(NIPAAm-co-DMAPAAm-co-BMA) silica beads on the top. The sample purification efficacy of the prepared spin column was evaluated on a model sample analyte (the antifungal drug voriconazole mixed with blood serum proteins). At 40 °C, the serum proteins and voriconazole were adsorbed on the prepared spin column via hydrophobic and electrostatic interactions. When the temperature was decreased to 4 °C, the adsorbed voriconazole was eluted from the column with the pure water eluent, while the serum proteins remained in the column. This temperature-responsive spin column realizes sample preparation simply by changing the temperature.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
| | - Yuta Ishizawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Masakazu Inoue
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Matsurika Kokubun
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan
| | - Sota Yamada
- 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
| |
Collapse
|
12
|
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.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan.
| |
Collapse
|
13
|
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]
|
14
|
Nagase K, Umemoto Y, Kanazawa H. Effect of pore diameter on the elution behavior of analytes from thermoresponsive polymer grafted beads packed columns. Sci Rep 2021; 11:9976. [PMID: 33976250 PMCID: PMC8113370 DOI: 10.1038/s41598-021-89165-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/21/2021] [Indexed: 02/07/2023] Open
Abstract
Temperature-responsive chromatography using thermoresponsive polymers is innovative and can control analyte retention via column temperature. Analyte elution behavior in this type of chromatography depends on the modified thermoresponsive polymer and the structure of the base materials. In the present study, we examine the effect of the pore diameter of silica beads on analyte elution behavior in temperature-responsive chromatography. Poly(N-isopropylacrylamide-co-n-butyl methacrylate) hydrogel was applied to beads of various pore sizes: 7, 12, and 30 nm. Almost the same amount of copolymer hydrogel was applied to all beads, indicating that the efficiency of copolymer modification was independent of pore size. Analyte retention on prepared beads in a packed column was observed using steroids, benzodiazepines, and barbiturates as analytes. Analyte retention times increased with temperature on packed columns of 12- and 30-nm beads, whereas the column packed with 7-nm beads exhibited decreased retention times with increasing temperature. The difference in analyte elution behavior among the various pore sizes was attributed to analyte diffusion into the bead pores. These results demonstrate that bead pore diameter determines temperature-dependent elution behavior.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo, 105-8512, Japan.
| | - Yuta Umemoto
- 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
| |
Collapse
|
15
|
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.
Collapse
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.
| |
Collapse
|
16
|
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]
|
17
|
Nagase K, Ishii S, Ikeda K, Yamada S, Ichikawa D, Akimoto AM, Hattori Y, Kanazawa H. Antibody drug separation using thermoresponsive anionic polymer brush modified beads with optimised electrostatic and hydrophobic interactions. Sci Rep 2020; 10:11896. [PMID: 32719404 PMCID: PMC7385495 DOI: 10.1038/s41598-020-68707-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 06/09/2020] [Indexed: 12/15/2022] Open
Abstract
Antibody drugs play an important role in biopharmaceuticals, because of the specificity for target biomolecules and reduction of side effects. Thus, separation and analysis techniques for these antibody drugs have increased in importance. In the present study, we develop functional chromatography matrices for antibody drug separation and analysis. Three types of polymers, poly(N-isopropylacrylamide (NIPAAm)-co-2-acrylamido-2-methylpropanesulfonic acid (AMPS)-co-N-phenyl acrylamide (PhAAm)), P(NIPAAm-co-AMPS-co-n-butyl methacrylate (BMA)), and P(NIPAAm-co-AMPS-co-tert-butylacrylamide (tBAAm)), were modified on silica beads through atom transfer radical polymerisation. Rituximab elution profiles were observed using the prepared beads-packed column. Rituximab adsorption at high temperature and elution at low temperature from the column were observed, as a result of the temperature-modulated electrostatic and hydrophobic interactions. Using the column, rituximab purification from contaminants was performed simply by changing the temperature. Additionally, three types of antibody drugs were separated using the column through temperature-modulated hydrophobic and electrostatic interactions. These results demonstrate that the temperature-responsive column can be applied for the separation and analysis of biopharmaceuticals through a simple control of the column temperature.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan.
| | - Saki Ishii
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| | - Koji Ikeda
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| | - Sota Yamada
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| | - Daiju Ichikawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| | - Aya Mizutani Akimoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656, Japan
| | - Yutaka Hattori
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Tokyo, Minato, 105-8512, Japan
| |
Collapse
|
18
|
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.
Collapse
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
| |
Collapse
|
19
|
Islam MN, Khan MN, Mallik AK, Rahman MM. Preparation of bio-inspired trimethoxysilyl group terminated poly(1-vinylimidazole)-modified-chitosan composite for adsorption of chromium (VI) ions. JOURNAL OF HAZARDOUS MATERIALS 2019; 379:120792. [PMID: 31247393 DOI: 10.1016/j.jhazmat.2019.120792] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 06/17/2019] [Accepted: 06/17/2019] [Indexed: 06/09/2023]
Abstract
Chitosan and poly(1-vinylimidazole) are both potential adsorbents to remove Cr(VI). Here, we designed the preparation of new adsorbents by combining chitosan and poly(1-vinylimidazole) to get the synergistic effect for the removal of hexavalent chromium. Trimethoxysilyl group terminated poly(1-vinylimidazole)-modified-chitosan composite was successfully synthesized by one-step free radical polymerization based on the grafting backbone of chitosan and vinylimidazole. The resulting adsorbents were used for the removal of Cr(VI) ions from the aqueous solution. The modified chitosan composite was characterized by ATR, FTIR, BET isotherm studies, elemental analysis, TGA, DSC, FE-SEM, and EDX. ATR. FTIR results confirmed the presence of the imidazole group in modified chitosan. The adsorption results were described by the Langmuir isotherm model with a maximum adsorption capacity of 196.1 mg/g for modified chitosan, however, the chitosan yielded 151.5 mg/g. It has been observed that the adsorption of chromium fitted better with the pseudo-second-order kinetics. The modified chitosan composite exhibited greater adsorption capacity than chitosan for hexavalent chromium and has potential application for Cr(VI) removal from aqueous solution containing other common ions with regeneration ability. This novel approach of modifying chitosan with telomerized poly(1-vinyl imidazole) offers potential application in wastewater treatment of different industries releasing Cr (VI).
Collapse
Affiliation(s)
- Md Nazrul Islam
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - M Nuruzzaman Khan
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Abul K Mallik
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh.
| | - Mohammed Mizanur Rahman
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| |
Collapse
|
20
|
Nagase K, Watanabe M, Zen F, Kanazawa H. Temperature-responsive mixed-mode column containing temperature-responsive polymer-modified beads and anionic polymer-modified beads. Anal Chim Acta 2019; 1079:220-229. [DOI: 10.1016/j.aca.2019.06.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/18/2019] [Accepted: 06/04/2019] [Indexed: 10/26/2022]
|
21
|
Thermosensitive gels incorporating cyclic monoazatetrathioether units for the selective extraction of class b metal ions. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00928-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
22
|
Nemoto R, Fujieda K, Hiruta Y, Hishida M, Ayano E, Maitani Y, Nagase K, Kanazawa H. Liposomes with temperature-responsive reversible surface properties. Colloids Surf B Biointerfaces 2019; 176:309-316. [DOI: 10.1016/j.colsurfb.2019.01.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 10/27/2022]
|
23
|
Lee JH, Ryoo JJ. Ultrasound‐Controlled Chiral Separation of Four Amino Acids and 2,2,2‐Trifluoro‐1‐(9‐anthryl)ethanol. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jae Hwan Lee
- Department of Chemistry EducationKyungpook National University Daegu South Korea, 702‐701
| | - Jae Jeong Ryoo
- Department of Chemistry EducationKyungpook National University Daegu South Korea, 702‐701
| |
Collapse
|
24
|
Nagase K, Hasegawa M, Ayano E, Maitani Y, Kanazawa H. Effect of Polymer Phase Transition Behavior on Temperature-Responsive Polymer-Modified Liposomes for siRNA Transfection. Int J Mol Sci 2019; 20:E430. [PMID: 30669495 PMCID: PMC6358841 DOI: 10.3390/ijms20020430] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 01/15/2019] [Accepted: 01/15/2019] [Indexed: 12/11/2022] Open
Abstract
Small interfering RNAs (siRNAs) have been attracting significant attention owing to their gene silencing properties, which can be utilized to treat intractable diseases. In this study, two temperature-responsive liposomal siRNA carriers were prepared by modifying liposomes with different polymers-poly(N-isopropylacrylamide-co-N,N-dimethylaminopropyl acrylamide) (P(NIPAAm-co-DMAPAAm)) and poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide) P(NIPAAm-co-DMAAm). The phase transition of P(NIPAAm-co-DMAPAAm) was sharper than that of P(NIPAAm-co-DMAAm), which is attributed to the lower co-monomer content. The temperature dependent fixed aqueous layer thickness (FALT) of the prepared liposomes indicated that modifying liposomes with P(NIPAAm-co-DMAPAAm) led to a significant change in the thickness of the fixed aqueous monolayer between 37 °C and 42 °C; while P(NIPAAm-co-DMAAm) modification led to FALT changes over a broader temperature range. The temperature-responsive liposomes exhibited cellular uptake at 42 °C, but were not taken up by cells at 37 °C. This is likely because the thermoresponsive hydrophilic/hydrophobic changes at the liposome surface induced temperature-responsive cellular uptake. Additionally, siRNA transfection of cells for the prevention of luciferase and vascular endothelial growth factor (VEGF) expression was modulated by external temperature changes. P(NIPAAm-co-DMAPAAm) modified liposomes in particular exhibited effective siRNA transfection properties with low cytotoxicity compared with P(NIPAAm-co-DMAAm) modified analogues. These results indicated that the prepared temperature-responsive liposomes could be used as effective siRNA carriers whose transfection properties can be modulated by temperature.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan.
| | - Momoko Hasegawa
- 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.
| | - Yoshie Maitani
- 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.
| |
Collapse
|
25
|
Nagase K, Okano T, Kanazawa H. Poly(N-isopropylacrylamide) based thermoresponsive polymer brushes for bioseparation, cellular tissue fabrication, and nano actuators. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2018.03.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
26
|
Matsuura M, Ohshima M, Hiruta Y, Nishimura T, Nagase K, Kanazawa H. LAT1-Targeting Thermoresponsive Fluorescent Polymer Probes for Cancer Cell Imaging. Int J Mol Sci 2018; 19:E1646. [PMID: 29865203 PMCID: PMC6032285 DOI: 10.3390/ijms19061646] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 01/31/2023] Open
Abstract
L-type amino acid transporter 1 (LAT1) is more highly expressed in cancer cells compared with normal cells. LAT1 targeting probes would therefore be a promising tool for cancer cell imaging. In this study, LAT1-targeting thermoresponsive fluorescent polymer probes based on poly(N-isopropylacrylamide-co-N,N-dimethylacrylamide) (P(NIPAAm-co-DMAAm)) were synthesized and their affinity for LAT1 was evaluated. The synthesized polymer probes interacted with LAT1 on HeLa cells, and inhibition of l-[³H]-leucine, one of the substrates for LAT1 uptake, was investigated. l-Tyrosine-conjugated P(NIPAAm-co-DMAAm) inhibited the uptake of l-[³H]-leucine, while P(NIPAAm-co-DMAAm) and l-phenylalanine-conjugated P(NIPAAm-co-DMAAm) did not. This result indicated that l-tyrosine-conjugated polymer has a high affinity for LAT1. The fluorescent polymer probes were prepared by modification of a terminal polymer group with fluorescein-5-maleimide (FL). Above the polymer transition temperature, cellular uptake of the polymer probes was observed because the polymers became hydrophobic, which enhanced the interaction with the cell membrane. Furthermore, quantitative analysis of the fluorescent probe using flow cytometry indicated that l-tyrosine-conjugated P(NIPAAm-co-DMAAm)-FL shows higher fluorescence intensity earlier than P(NIPAAm-co-DMAAm)-FL. The result suggested that cellular uptake was promoted by the LAT1 affinity site. The developed LAT1-targeting thermoresponsive fluorescent polymer probes are expected to be useful for cancer cell imaging.
Collapse
Affiliation(s)
- Minami Matsuura
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8012, Japan.
| | - Mariko Ohshima
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8012, Japan.
| | - Yuki Hiruta
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
| | - Tomohiro Nishimura
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8012, Japan.
| | - Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8012, Japan.
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8012, Japan.
| |
Collapse
|
27
|
NAGASE K, OKANO T, KANAZAWA H. Design of Functional Thermoresponsive Polymer Brushes and Their Application to Bioseparation. KOBUNSHI RONBUNSHU 2018. [DOI: 10.1295/koron.2017-0073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Teruo OKANO
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University, TWIns
- Cell Sheet Tissue Engineering Center (CSTEC) and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah
| | | |
Collapse
|
28
|
Nagase K, Yamato M, Kanazawa H, Okano T. Poly(N-isopropylacrylamide)-based thermoresponsive surfaces provide new types of biomedical applications. Biomaterials 2017; 153:27-48. [PMID: 29096399 DOI: 10.1016/j.biomaterials.2017.10.026] [Citation(s) in RCA: 236] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/12/2017] [Accepted: 10/15/2017] [Indexed: 02/06/2023]
Abstract
Thermoresponsive surfaces, prepared by grafting of poly(N-isopropylacrylamide) (PIPAAm) or its copolymers, have been investigated for biomedical applications. Thermoresponsive cell culture dishes that show controlled cell adhesion and detachment following external temperature changes, represent a promising application of thermoresponsive surfaces. These dishes can be used to fabricate cell sheets, which are currently used as effective therapies for patients. Thermoresponsive microcarriers for large-scale cell cultivation have also been developed by taking advantage of the thermally modulated cell adhesion and detachment properties of thermoresponsive surfaces. Furthermore, thermoresponsive bioseparation systems using thermoresponsive surfaces for separating and purifying pharmaceutical proteins and therapeutic cells have been developed, with the separation systems able to maintain their activity and biological potency throughout the procedure. These applications of thermoresponsive surfaces have been improved with progress in preparation techniques of thermoresponsive surfaces, such as polymerization methods, and surface modification techniques. In the present review, the various types of PIPAAm-based thermoresponsive surfaces are summarized by describing their preparation methods, properties, and successful biomedical applications.
Collapse
Affiliation(s)
- Kenichi Nagase
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan; Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan.
| | - Masayuki Yamato
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Hideko Kanazawa
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato, Tokyo 105-8512, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, TWIns, 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan; Cell Sheet Tissue Engineering Center (CSTEC) and Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 South 2000 East, Salt Lake City, Utah 84112, USA.
| |
Collapse
|
29
|
YUSA SI, TATEIWA H, YAZAWA T. An Organic-Inorganic Hybrid Thermo-Responsive Valve. KOBUNSHI RONBUNSHU 2017. [DOI: 10.1295/koron.2016-0061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
30
|
Kikuchi A, Kobayashi J, Okano T, Iwasa T, Sakai K. Temperature-Modulated Interaction Changes with Adenosine Nucleotides on Intelligent Cationic, Thermoresponsive Surfaces1. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911507084294] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Thin layer poly(N-isopropylacrylamide-co-n-butyl-methacrylate-co-N,N-dimethylaminopropylacrylamide) (IBD) copolymer gels are covalently introduced to initiator immobilized silica bead surfaces to create thermally sensitive intelligent cationic surfaces. The surface shows thermoresponsive changes in charge density as well as hydrophilic/hydrophobic character. The polymer chains dehydrate and inter-/intra-molecular aggregation occurs due to weakly deprotonated cationic amino groups in the hydrophobized circumstances, resulting in the surface charge density decrease. This was corroborated by the thermoresponsive pKa shift of dimethylamino side groups in the copolymers as well as the surface potential changes at elevated temperature. The unique characteristics of the IBD copolymer-immobilized surfaces were applied to regulate adenosine nucleotides retention in high-performance liquid chromatography using aqueous mobile phase by thermal stimulus. At lower temperature, adenosine nucleotides showed higher retention which was primarily driven by ionic interaction with positively charged surfaces. With increasing temperatures, their retention was shortened and a drastic change was observed above the polymer transition temperatures. This is strong evidence that the solute interaction is being regulated by the thermoresponsive surface charge density changes and hydrophobic alterations. Furthermore, we confirmed the modulation of nucleotide retention by step-temperature gradient without changing mobile phase composition. These findings should be beneficial in utilizing this stimuli responsive surface for the separation of bioactive compounds in aqueous system and environmental impact.
Collapse
Affiliation(s)
- Akihiko Kikuchi
- Department of Materials Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan, Institute of Advanced Biomedical Engineering and Science, and Center of Excellence Program for the 21st Century, Tokyo Women's Medical University 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Jun Kobayashi
- Institute of Advanced Biomedical Engineering and Science, and Center of Excellence Program for the 21st Century, Tokyo Women's Medical University 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, and Center of Excellence Program for the 21st Century, Tokyo Women's Medical University 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan,
| | - Takeshi Iwasa
- Faculty of Science and Engineering, Department of Applied Chemistry Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555, Japan
| | - Kiyotaka Sakai
- Faculty of Science and Engineering, Department of Applied Chemistry Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo 169-8555, Japan
| |
Collapse
|
31
|
Takahashi S, Iizuka H, Kuwabara R, Naito Y, Sakamoto T, Miyagi A, Onozato M, Ichiba H, Fukushima T. Determination ofl-tryptophan andl-kynurenine derivatized with (R)-4-(3-isothiocyanatopyrrolidin-1-yl)-7-(N,N-dimethylaminosulfonyl)-2,1,3-benzoxadiazole by LC-MS/MS on a triazole-bonded column and their quantification in human serum. Biomed Chromatogr 2016; 30:1481-6. [DOI: 10.1002/bmc.3709] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/05/2016] [Accepted: 02/11/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Shuuhei Takahashi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Hideaki Iizuka
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Ryousuke Kuwabara
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Yoko Naito
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Tatsuya Sakamoto
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Aya Miyagi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Mayu Onozato
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Hideaki Ichiba
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| | - Takeshi Fukushima
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences; Toho University; 2-2-1 Miyama, Funabashi-shi Chiba 274-8510 Japan
| |
Collapse
|
32
|
Hiruta Y, Kanazashi R, Ayano E, Okano T, Kanazawa H. Temperature-responsive molecular recognition chromatography using phenylalanine and tryptophan derived polymer modified silica beads. Analyst 2016; 141:910-7. [DOI: 10.1039/c5an01996f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The separation system with dual temperature-response and molecular recognition characteristics leads to selective separation using only aqueous solution.
Collapse
Affiliation(s)
- Yuki Hiruta
- Faculty of Pharmacy
- Keio University
- Minato
- Japan
| | | | - Eri Ayano
- Faculty of Pharmacy
- Keio University
- Minato
- Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University
- Shinjuku
- Japan
| | | |
Collapse
|
33
|
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.
Collapse
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
| |
Collapse
|
34
|
Tunable temperature responsive liquid chromatography through thiolactone-based immobilization of poly(N-isopropylacrylamide). J Chromatogr A 2015; 1426:126-32. [PMID: 26655790 DOI: 10.1016/j.chroma.2015.11.063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/17/2015] [Accepted: 11/18/2015] [Indexed: 11/20/2022]
Abstract
A straightforward and efficient functionalization of aminopropylsilica with polymeric structures is described for the development of temperature responsive stationary phases applicable in purely aqueous liquid chromatography. The immobilization of the thermoresponsive polymers involves a thiolactone-based ring opening using the primary amines in aminopropylsilica, with a simultaneous one-pot, thiol-ene functionalization with an acrylate of choice. This mild, straightforward and modular grafting process results in high polymer coupling yields. By variation of the acrylate for the thiol-ene reaction, different stationary phases can be readily obtained. Two stationary phases as a result of the modular modification of aminopropylsilica were evaluated with test mixtures of hydrophobic analytes and a mixture of di- and tripeptides. Analyses using the 5μm material packed in 10cm×4.6mm columns revealed high hydrophobic retention, which proved adaptable as a function of the temperature in aqueous mobile phases. High versus low retention were obtained at temperatures above and below the lower critical solution temperature of the polymer, respectively. Moreover, the columns depict potential for diastereoisomeric peptide separation. Finally, the lower retention, observed when using PEGylated silica, illustrates the potential of the approach for modular stationary phase tuning.
Collapse
|
35
|
Direct labeling of 19F-perfluorocarbon onto multilayered cell sheet for MRI-based non-invasive cell tracking. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-014-0092-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
36
|
Hiruta Y, Nagumo Y, Suzuki Y, Funatsu T, Ishikawa Y, Kanazawa H. The effects of anionic electrolytes and human serum albumin on the LCST of poly( N -isopropylacrylamide)-based temperature-responsive copolymers. Colloids Surf B Biointerfaces 2015; 132:299-304. [DOI: 10.1016/j.colsurfb.2015.05.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 04/28/2015] [Accepted: 05/18/2015] [Indexed: 01/01/2023]
|
37
|
Application of polymeric macroporous supports for temperature-responsive chromatography of pharmaceuticals. J Chromatogr A 2015; 1407:90-9. [DOI: 10.1016/j.chroma.2015.06.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 06/01/2015] [Accepted: 06/10/2015] [Indexed: 01/29/2023]
|
38
|
Radecki M, Spěváček J, Zhigunov A, Sedláková Z, Hanyková L. Temperature-induced phase transition in hydrogels of interpenetrating networks of poly(N-isopropylacrylamide) and polyacrylamide. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.04.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
39
|
Efficient removal of pentachlorophenol from wastewater by novel hydrophobically modified thermo-sensitive hydrogels. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2014.10.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
40
|
Chang B, Zhang M, Qing G, Sun T. Dynamic biointerfaces: from recognition to function. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1097-1112. [PMID: 25354445 DOI: 10.1002/smll.201402038] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 08/28/2014] [Indexed: 06/04/2023]
Abstract
The transformation of recognition signals into regulating macroscopic behaviors of biological entities (e.g., biomolecules and cells) is an extraordinarily challenging task in engineering interfacial properties of artificial materials. Recently, there has been extensive research for dynamic biointerfaces driven by biomimetic techniques. Weak interactions and chirality are two crucial routes that nature uses to achieve its functions, including protein folding, the DNA double helix, phospholipid membranes, photosystems, and shell and tooth growths. Learning from nature inspires us to design dynamic biointerfaces, which usually take advantage of highly selective weak interactions (e.g., synergetic chiral H-bonding interactions) to tailor their molecular assemblies on external stimuli. Biomolecules can induce the conformational transitions of dynamic biointerfaces, then drive a switching of surface characteristics (topographic structure, wettability, etc.), and eventually achieve macroscopic functions. The emerging progresses of dynamic biointerfaces are reviewed and its role from molecular recognitions to biological functions highlighted. Finally, a discussion is presented of the integration of dynamic biointerfaces with the basic biochemical processes, possibly solving the big challenges in life science.
Collapse
Affiliation(s)
- Baisong Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, PR China
| | | | | | | |
Collapse
|
41
|
Hiruta Y, Nagumo Y, Miki A, Okano T, Kanazawa H. Effects of terminal group and chain length on temperature-responsive chromatography utilizing poly(N-isopropylacrylamide) synthesized via RAFT polymerization. RSC Adv 2015. [DOI: 10.1039/c5ra15906g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Even using the same homo poly(N-isopropylacrylamide) immobilized silica beads as stationary phases, terminal functional group and chain length significantly affected temperature-dependent elution behavior of steroids.
Collapse
Affiliation(s)
- Yuki Hiruta
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
| | - Yuhei Nagumo
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
| | - Atsushi Miki
- Faculty of Pharmacy
- Keio University
- Tokyo 105-8512
- Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science
- Tokyo Women's Medical University
- TWIns
- Tokyo 162-8666
- Japan
| | | |
Collapse
|
42
|
Ayano E, Kanazawa H. Temperature-responsive smart packing materials utilizing multi-functional polymers. ANAL SCI 2014; 30:167-73. [PMID: 24420259 DOI: 10.2116/analsci.30.167] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Polymers that respond to small changes in environmental stimuli with large, sometimes discontinuous changes in their physical state or properties, are often called "smart" polymers. Poly(N-isopropylacrylamide), PNIPAAm, is one of the most representative smart polymer that exhibits a thermally reversible soluble-insoluble change in the vicinity of its lower critical solution temperature (LCST) at 32°C in aqueous solution. Temperature-responsive chromatography for the separation of biomolecules utilizing the poly(N-isopropylacrylamide) (PNIPAAm)-modified stationary phase is performed with an aqueous mobile phase without using an organic solvent. The surface properties and function of the stationary phase are controlled by external temperature changes without changing the mobile-phase composition. The separation of the biomolecules, such as nucleotides, was achieved by a dual temperature- and pH-responsive chromatography system. The electrostatic and hydrophobic interactions could be modulated simultaneously with the temperature in an aqueous mobile phase. Additionally, we also prepared functional copolymers composed of N-isopropylacrylamide (NIPAAm) and amino acid derivative or naphthyl alanine derivative, which have temperature-responsiveness and molecular recognition. These separation systems would have potential applications in the separation of biomolecules.
Collapse
Affiliation(s)
- Eri Ayano
- Faculty of Pharmacy, Keio University
| | | |
Collapse
|
43
|
Terefe NS, Glagovskaia O, De Silva K, Stockmann R. Application of stimuli responsive polymers for sustainable ion exchange chromatography. FOOD AND BIOPRODUCTS PROCESSING 2014. [DOI: 10.1016/j.fbp.2014.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
44
|
AYANO E, SUZUKI Y, NISHIO T, NAGATA Y, KANAZAWA H, NAGASE K, OKANO T. Liquid Chromatography-Mass Spectrometric Analysis of Dehydroepiandrosterone and Related Steroids Utilizing a Temperature-Responsive Stationary Phase. CHROMATOGRAPHY 2014. [DOI: 10.15583/jpchrom.2014.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Eri AYANO
- Faculty of Pharmacy, Keio University
| | | | | | | | | | - Kenichi NAGASE
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University
| | - Teruo OKANO
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University
| |
Collapse
|
45
|
SAKATA K, OHKUBO K, HIRUTA Y, AYANO E, KANAZAWA H. Temperature-Responsive Chromatography Using a Functional Polymer Modified Stationary Phase with Molecular Recognition Sites. KOBUNSHI RONBUNSHU 2014. [DOI: 10.1295/koron.71.293] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
46
|
Nagase K, Hatakeyama Y, Shimizu T, Matsuura K, Yamato M, Takeda N, Okano T. Hydrophobized Thermoresponsive Copolymer Brushes for Cell Separation by Multistep Temperature Change. Biomacromolecules 2013; 14:3423-33. [DOI: 10.1021/bm4006722] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Kenichi Nagase
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Yuri Hatakeyama
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
- Department
of Life Science and Medical Bioscience, School of Advanced
Science and Engineering, Waseda University (TWIns), 2-2 Wakamatsucho, Shinjuku, Tokyo 162-8480, Japan
| | - Tatsuya Shimizu
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Katsuhisa Matsuura
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Masayuki Yamato
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| | - Naoya Takeda
- Department
of Life Science and Medical Bioscience, School of Advanced
Science and Engineering, Waseda University (TWIns), 2-2 Wakamatsucho, Shinjuku, Tokyo 162-8480, Japan
| | - Teruo Okano
- Institute
of Advanced Biomedical Engineering and Science, Tokyo Women’s Medical University (TWIns), 8-1 Kawadacho, Shinjuku, Tokyo 162-8666, Japan
| |
Collapse
|
47
|
Kobayashi J, Okano T. Thermoresponsive thin hydrogel-grafted surfaces for biomedical applications. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.01.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
48
|
Integrated system for temperature-controlled fast protein liquid chromatography comprising improved copolymer modified beaded agarose adsorbents and a travelling cooling zone reactor arrangement. J Chromatogr A 2013; 1285:97-109. [DOI: 10.1016/j.chroma.2013.02.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 02/05/2013] [Accepted: 02/07/2013] [Indexed: 11/22/2022]
|
49
|
Oh SY, Bae YC. Molecular thermodynamic analysis for reentrant and reentrant-convex type swelling behaviors of thermo-sensitive hydrogels in mixed solvents. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
50
|
Silva MESR, Mano V, Pacheco RRJ, Freitas RFS. Miscibility Behavior of Polyacrylamides Poly(Ethylene Glycol) Blends: Flory Huggins Interaction Parameter Determined by Thermal Analysis. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jmp.2013.47a2007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|