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Zhao C, Ma Z, Zhu X. Rational design of thermoresponsive polymers in aqueous solutions: A thermodynamics map. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.01.001] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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2
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Xu Z, Liu W. Poly(N-acryloyl glycinamide): a fascinating polymer that exhibits a range of properties from UCST to high-strength hydrogels. Chem Commun (Camb) 2018; 54:10540-10553. [DOI: 10.1039/c8cc04614j] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This feature article introduces the diverse intriguing properties of poly(N-acryloyl glycinamide) aqueous systems spanning from low to high concentrations.
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Affiliation(s)
- Ziyang Xu
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
| | - Wenguang Liu
- School of Materials Science and Engineering
- Tianjin Key Laboratory of Composite and Functional Materials
- Tianjin University
- Tianjin 300350
- China
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Qin X, Chen K, Cao L, Zhang Y, Li L, Guo X. Antifouling performance of nano-sized spherical poly(N-hydroxyethyl acrylamide) brush. Colloids Surf B Biointerfaces 2017; 155:408-414. [PMID: 28460303 DOI: 10.1016/j.colsurfb.2017.04.048] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 04/17/2017] [Accepted: 04/22/2017] [Indexed: 11/16/2022]
Abstract
The biomedical applications of nanoparticles are still impeded by the non-specific adsorption of proteins, cells, or others biological species in vivo/in vitro. In this work, poly(N-hydroxyethyl acrylamide) was hired to modify a solid polymer core, polystyrene (PS) nanoparticles, via surface-initiated photo-emulsion polymerization to form nano-sized spherical poly(N-hydroxyethyl acrylamide) brush (PS@PHEAA). Its antifouling ability and stability were investigated by dynamic light scattering (DLS), turbidimetric titration, and isothermal titration calorimetry (ITC). The size of PS@PHEAA was constant as a function of pH, while slightly changed with ionic strength in single protein solution. ITC data confirmed that protein was slightly adsorbed on PS@PHEAA and the ionic strength influenced the adsorption. All characterizations demonstrated that PHEAA layer reduced the interaction between nanoparticles and proteins. Thus, these nanoparticles ideal candidates for future applications in the biomedical field.
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Affiliation(s)
- Xue Qin
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Kaimin Chen
- College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
| | - Lan Cao
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Ying Zhang
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Li Li
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; Engineering Research Center of Materials Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Xinjiang 832000, China.
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4
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Pieters S, Vander Heyden Y, Roger JM, D'Hondt M, Hansen L, Palagos B, De Spiegeleer B, Remon JP, Vervaet C, De Beer T. Raman spectroscopy and multivariate analysis for the rapid discrimination between native-like and non-native states in freeze-dried protein formulations. Eur J Pharm Biopharm 2013; 85:263-71. [PMID: 23665447 DOI: 10.1016/j.ejpb.2013.03.035] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 03/29/2013] [Accepted: 03/30/2013] [Indexed: 11/28/2022]
Abstract
This study investigates whether Raman spectroscopy combined with multivariate analysis (MVA) enables a rapid and direct differentiation between two classes of conformational states, i.e., native-like and non-native proteins, in freeze-dried formulations. A data set comprising of 99 spectra, both from native-like and various types of non-native freeze-dried protein formulations, was obtained by freeze-drying lactate dehydrogenase (LDH) as model protein under various conditions. Changes in the secondary structure in the solid freeze-dried proteins were determined through visual interpretation of the blank corrected second derivative amide I band in the ATR-FTIR spectra (further called FTIR spectra) and served as an independent reference to assign class labels. Exploratory analysis and supervised classification, using Principal Components Analysis (PCA) and Partial Least Squares - Linear Discriminant Analysis (PLS-LDA), respectively, revealed that Raman spectroscopy is with 95% accuracy able to correctly discriminate between native-like and non-native states in the tested freeze-dried LDH formulations. Backbone (i.e., amide III) and side chain sensitive spectral regions proved important for making the discrimination between both classes. As discrimination was not influenced by the spectral signals from the tested excipients, there was no need for blank corrections. The Raman model may allow direct and automated analysis of the investigated quality attribute, opening possibilities for a real time and in-line quality indication as a future step. However, the sensitivity of the method should be further investigated and where possible improved.
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Affiliation(s)
- Sigrid Pieters
- Department of Analytical Chemistry and Pharmaceutical Technology, Vrije Universiteit Brussel - VUB, Brussels, Belgium
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Seuring J, Agarwal S. Polymers with upper critical solution temperature in aqueous solution. Macromol Rapid Commun 2012; 33:1898-920. [PMID: 22961764 DOI: 10.1002/marc.201200433] [Citation(s) in RCA: 396] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/27/2012] [Indexed: 01/29/2023]
Abstract
This review focuses on polymers with upper critical solution temperature (UCST) in water or electrolyte solution and provides a detailed survey of the yet few existing examples. A guide for synthetic chemists for the design of novel UCST polymers is presented and possible handles to tune the phase transition temperature, sharpness of transition, hysteresis, and effectiveness of phase separation are discussed. This review tries to answer the question why polymers with UCST remained largely underrepresented in academic as well as applied research and what requirements have to be fulfilled to make these polymers suitable for the development of smart materials with a positive thermoresponse.
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Affiliation(s)
- Jan Seuring
- Philipps-Universität Marburg, Department of Chemistry and Scientific Center for Materials Science, Hans-Meerwein Straße, 35032 Marburg, Germany
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6
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Liu F, Seuring J, Agarwal S. Controlled radical polymerization ofN-acryloylglycinamide and UCST-type phase transition of the polymers. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26322] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Seuring J, Agarwal S. First Example of a Universal and Cost-Effective Approach: Polymers with Tunable Upper Critical Solution Temperature in Water and Electrolyte Solution. Macromolecules 2012. [DOI: 10.1021/ma300355k] [Citation(s) in RCA: 217] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jan Seuring
- Department of Chemistry and Scientific
Center for Materials
Science, Philipps-Universität Marburg, Hans-Meerwein Straße, D-35032 Marburg, Germany
| | - Seema Agarwal
- Department of Chemistry and Scientific
Center for Materials
Science, Philipps-Universität Marburg, Hans-Meerwein Straße, D-35032 Marburg, Germany
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Seuring J, Bayer FM, Huber K, Agarwal S. Upper Critical Solution Temperature of Poly(N-acryloyl glycinamide) in Water: A Concealed Property. Macromolecules 2011. [DOI: 10.1021/ma202059t] [Citation(s) in RCA: 173] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Jan Seuring
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße, D-35032 Marburg, Germany
| | - Frank M. Bayer
- Department Chemie−Physikalische Chemie,Universität Paderborn,Warburger Straße 100, D-33098 Paderborn, Germany
| | - Klaus Huber
- Department Chemie−Physikalische Chemie,Universität Paderborn,Warburger Straße 100, D-33098 Paderborn, Germany
| | - Seema Agarwal
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße, D-35032 Marburg, Germany
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Shimada N, Ino H, Maie K, Nakayama M, Kano A, Maruyama A. Ureido-Derivatized Polymers Based on Both Poly(allylurea) and Poly(l-citrulline) Exhibit UCST-Type Phase Transition Behavior under Physiologically Relevant Conditions. Biomacromolecules 2011; 12:3418-22. [DOI: 10.1021/bm2010752] [Citation(s) in RCA: 144] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Naohiko Shimada
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
| | - Haruka Ino
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
| | - Kenji Maie
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
| | - Miki Nakayama
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
| | - Arihiro Kano
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
| | - Atsushi Maruyama
- Institute for Materials Chemistry and Engineering, Kyushu University, Motooka 744-CE11, Nishi-ku, Fukuoka
819-0395, Japan
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Seuring J, Agarwal S. Non-Ionic Homo- and Copolymers with H-Donor and H-Acceptor Units with an UCST in Water. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000147] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Glatzel S, Badi N, Päch M, Laschewsky A, Lutz JF. Well-defined synthetic polymers with a protein-like gelation behavior in water. Chem Commun (Camb) 2010; 46:4517-9. [DOI: 10.1039/c0cc00038h] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Juszczak LJ. Comparative vibrational spectroscopy of intracellular tau and extracellular collagen I reveals parallels of gelation and fibrillar structure. J Biol Chem 2003; 279:7395-404. [PMID: 14660656 DOI: 10.1074/jbc.m309971200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The N-terminal tau 2-19 peptide undergoes gelation, syneresis, and aggregation over a period of years. These changes may be approximated on a shorter time scale by agitation and partial dehydration. The anomalously enhanced (229 nm) ultraviolet resonance Raman (UVRR) imide II band reveals a common structural feature for gels of nondehydrated tau 2-19 and collagen I and insoluble paired helical filaments (PHFs) and collagen I of weak hydrogen bonding at proline carbonyls. Anomalous UVRR enhancement of amide bands at 229 nm results from gel structure, as demonstrated by increased amide absorption at the red edge for tau 2-19 gel and implies the involvement of water in gel structure. In aged, dehydrated tau 2-19 gel, proline carbonyls lose their bonds to water and tyrosine becomes deprotonated, as demonstrated by UVRR spectroscopy. The Fourier transform infrared (FTIR) amide I band shows that antiparallel beta-sheet structure increases with syneresis in the tau 2-19 hydrogel. The comparison of FTIR results for PHFs with collagen I gel and polyproline demonstrates that the secondary structure of PHFs is polyproline II. One implication of this assignment is that the fibrillation of hydrophilic tau is thermodynamically driven by the entropy gained as hydrogen-bonded water is freed, as for collagen I. The FTIR results also show that peptide domains culled from a longer protein do not necessarily fold into identical secondary structures. A pathological, sequential mechanism of gelation, syneresis, and fibrillation for tau in AD is suggested and is supported by the observation of amorphous neurofibrillary tangle development and fibrillation in vivo.
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Affiliation(s)
- Laura J Juszczak
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Yeshiva University, Bronx, New York 10461, USA.
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