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Muttaqien SE, Nomoto T, Takemoto H, Matsui M, Tomoda K, Nishiyama N. Poly( N-isopropylacrylamide)-Based Polymer-Inducing Isothermal Hydrophilic-to-Hydrophobic Phase Transition via Detachment of Hydrophilic Acid-Labile Moiety. Biomacromolecules 2019; 20:1493-1504. [PMID: 30566830 DOI: 10.1021/acs.biomac.8b01465] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The polymerization of N-isopropylacrylamide (NIPAAm) with ionizable monomers results in pH-responsive lower critical solution temperature (LCST) polymer which works in an ionization-dependent manner. However, gradual ionization of the comonomer occurs at a broad pH range due to the electrostatic field generated by the polymers, limiting the extent of LCST shift in response to pH change. Furthermore, excess introduction of comonomer may dull phase transition behavior. Here, we report the development of an ionization-independent LCST polymer that exerts a sharp isothermal hydrophilic-to-hydrophobic phase transition in response to slight pH change. Our polymer has a poly(NIPAAm/2-aminoisoprpylacrylamide (AIPAAm)) (P(NIPAAm/AIPAAm)) backbone that retains the continuous structural similarity of N-alkyl groups for preserving phase transition sensitivity, and primary amine for forming hydrophilic acid-labile 2-propionic-3-methylmaleic (PMM) amide linkage. The PMM moiety improves the polymer's hydrophilicity and drastically increases the LCST. Detachment of the PMM moiety in response to mild acidic condition (pH < 6.8) lowers the LCST to that of original P(NIPAAm/AIPAAm), permitting isothermal pH-responsive phase transition. Utilizing this mechanism, P(NIPAAm/AIPAAm) modified with PMM amide linkage exhibits a sharp hydrophilic-to-hydrophobic transition at a physiological temperature (37 °C) and, strikingly, facilitates interaction with cultured cells. Most importantly, our polymer showed significantly higher accumulation within a solid tumor after systemic injection compared to conventional PNIPAAm, which may be due to its phase transition responding to slightly acidic tumor microenvironment. Thus, this study provides a novel polymer that offers delicate control of LCST and pH-responsiveness suitable for use in even fuzzy biological environments.
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Affiliation(s)
- Sjaikhurrizal El Muttaqien
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Center for Pharmaceutical and Medical Technology , Agency for the Assessment and Application of Technology (BPPT), LAPTIAB I, PUSPITEK , Serpong , Banten 15314 , Indonesia
| | - Takahiro Nomoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Hiroyasu Takemoto
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Makoto Matsui
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Keishiro Tomoda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan
| | - Nobuhiro Nishiyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Department of Life Science and Technology, School of Life Science and Technology , Tokyo Institute of Technology , 4259 Nagatsutacho, Midori-ku , Yokohama , Kanagawa 226-8503 , Japan.,Innovation Center of Nanomedicine (iCONM) , Kawasaki Institute of Industrial Promotion , 3-25-14 Tonomachi, Kawasaki-ku , Kawasaki , Kanagawa 210-0821 , Japan
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Vanparijs N, Nuhn L, De Geest BG. Transiently thermoresponsive polymers and their applications in biomedicine. Chem Soc Rev 2018; 46:1193-1239. [PMID: 28165097 DOI: 10.1039/c6cs00748a] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The focus of this review is on the class of transiently thermoresponsive polymers. These polymers are thermoresponsive, but gradually lose this property upon chemical transformation - often a hydrolysis reaction - in the polymer side chain or backbone. An overview of the different approaches used for the design of these polymers along with their physicochemical properties is given. Their amphiphilic properties and degradability into fully soluble compounds make this class of responsive polymers attractive for drug delivery and tissue engineering applications. Examples of these are also provided in this review.
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Affiliation(s)
- Nane Vanparijs
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Lutz Nuhn
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
| | - Bruno G De Geest
- Department of Pharmaceutics, Ghent University, Ottergemsesteenweg 460, 9000 Ghent, Belgium.
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Dhumure AB, Patil AB, Kulkarni AS, Voevodina I, Scandola M, Shinde VS. Thermoresponsive copolymers with pendant d-galactosyl 1,2,3-triazole groups: synthesis, characterization and thermal behavior. NEW J CHEM 2015. [DOI: 10.1039/c5nj01334h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of glycopolymers containing d-galactosyl 1,2,3-triazole groups were synthesized which exhibited thermosensitivity properties.
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Affiliation(s)
- Archana B. Dhumure
- Department of Chemistry
- Savitribai Phule Pune University (Formerly, University of Pune)
- Pune 411007
- India
| | - Ajay B. Patil
- Department of Chemistry
- Savitribai Phule Pune University (Formerly, University of Pune)
- Pune 411007
- India
| | - Anuja S. Kulkarni
- Department of Chemistry
- Savitribai Phule Pune University (Formerly, University of Pune)
- Pune 411007
- India
| | - Irina Voevodina
- Department of Chemistry ‘G. Ciamician’
- University of Bologna
- 40126 Bologna
- Italy
| | | | - Vaishali S. Shinde
- Department of Chemistry
- Savitribai Phule Pune University (Formerly, University of Pune)
- Pune 411007
- India
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Ajish JK, Ajish Kumar KS, Subramanian M, Kumar M. d-Glucose based bisacrylamide crosslinker: synthesis and study of homogeneous biocompatible glycopolymeric hydrogels. RSC Adv 2014. [DOI: 10.1039/c4ra09481f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The ability of sugar pendants in glycopolymeric hydrogels to mimic that on the cell surface can be used as a reliable method for the site specific delivery of drugs.
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Affiliation(s)
- Juby K. Ajish
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | - K. S. Ajish Kumar
- Bio-Organic Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
| | | | - Manmohan Kumar
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400085, India
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