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Dey A, Haldar U, Rajasekhar T, Ghosh P, Faust R, De P. Polyisobutylene-based glycopolymers as potent inhibitors for in vitro insulin aggregation. J Mater Chem B 2022; 10:9446-9456. [PMID: 36345931 DOI: 10.1039/d2tb01856j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A family of amphiphilic diblock copolymers containing a hydrophobic polyisobutylene (PIB, Mn = 1000 g mol-1) segment and a hydrophilic block with sugar pendants has been synthesized by combining living cationic and reversible addition-fragmentation chain transfer (RAFT) polymerization techniques; to explore their potential in insulin fibrillation inhibition. The glucose content in the hydrophilic segment has been tailor-made from 20 to 57 units to prepare block copolymers. The removal of the acetates from the pendent glucose units resulted in amphiphilic block copolymers that generated micellar aggregates in aqueous media. The treatment of insulin with these block copolymers affected the fibril formation process which was demonstrated using an array of biophysical techniques, namely, thioflavin T (ThT) fluorescence, tyrosine (Tyr) fluorescence, Nile red (NR) fluorescence, isothermal titration calorimetry (ITC), etc. The Tyr fluorescence assay and NR fluorescence study revealed the crucial role of hydrophobic interaction in the inhibition process, whereas ITC measurements confirmed the importance of polar interaction. Thus, the block copolymers exhibit potent inhibition of insulin fibrillation owing to hydrophobic (from PIB segment) and glycosidic cluster effect (from sugar pendant block).
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Affiliation(s)
- Asmita Dey
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246, Nadia, West Bengal, India.
| | - Ujjal Haldar
- Polymer Science Program, Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts 01854, USA
| | - Tota Rajasekhar
- Polymer Science Program, Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts 01854, USA
| | - Pooja Ghosh
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246, Nadia, West Bengal, India.
| | - Rudolf Faust
- Polymer Science Program, Department of Chemistry, University of Massachusetts Lowell, One University Avenue, Lowell, Massachusetts 01854, USA
| | - Priyadarsi De
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur - 741246, Nadia, West Bengal, India.
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Synthesis of block copolymers used in polymersome fabrication: Application in drug delivery. J Control Release 2021; 341:95-117. [PMID: 34774891 DOI: 10.1016/j.jconrel.2021.11.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 11/05/2021] [Accepted: 11/06/2021] [Indexed: 01/03/2023]
Abstract
Amphiphilic block copolymers are common materials used for the fabrication of various nanostructures with biomedical applications including nanocapsules, nanospheres, micelles and polymeric vesicles. According to the literature, polymersomes have several advantages compared to other nanostructures used as drug delivery systems comprising better stability, facile synthesis, prolonged circulation time, and passive/active targeting capability. Various types of nanoparticles are formed by varying the ratio of the hydrophobic/hydrophilic blocks. Changing hydrophobic/hydrophilic ratio of amphiphilic block copolymers has an impact on the structural characteristics of polymers such as changing molecular weight and surface functionalization of the block copolymer. Thus, polymerization strategies are an important factor that influences polymersomes quality. In this review, different polymerization strategies for the synthesis of block copolymers applied in polymersomes formation, are described.
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Dey A, Haldar U, De P. Block Copolymer Synthesis by the Combination of Living Cationic Polymerization and Other Polymerization Methods. Front Chem 2021; 9:644547. [PMID: 34262892 PMCID: PMC8273170 DOI: 10.3389/fchem.2021.644547] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 04/30/2021] [Indexed: 11/23/2022] Open
Abstract
The foremost limitation of block copolymer synthesis is to polymerize two or more different types of monomers with different reactivity profiles using a single polymerization technique. Controlled living polymerization techniques play a vital role in the preparation of wide range of block copolymers, thus are revolutionary techniques for polymer industry. Polymers with good control over molecular weight, molecular weight distribution, chain-end functionality and architectures can be prepared by these processes. In order to improve the existing applications and create new opportunities to design a new block copolymer system with improved physical and chemical properties, the combination of two different polymerization techniques have tremendous scope. Such kinds of macromolecules may be attended by combination of homopolymerization of different monomers by post-modification techniques using a macroinitiator or by using a dual initiator which allows the combination of two mechanistically distinct techniques. This review focuses on recent advances in synthesis of block copolymers by combination of living cationic polymerization with other polymerization techniques and click chemistry.
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Affiliation(s)
| | | | - Priyadarsi De
- Polymer Research Centre and Centre for Advanced Functional Materials, Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Kolkata, India
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Guo X, Choi B, Feng A, Thang SH. Polymer Synthesis with More Than One Form of Living Polymerization Method. Macromol Rapid Commun 2018; 39:e1800479. [DOI: 10.1002/marc.201800479] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/23/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Xiaofeng Guo
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Material Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Bonnie Choi
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Material Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - Anchao Feng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Material Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 China
| | - San H. Thang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, College of Material Science and Engineering; Beijing University of Chemical Technology; Beijing 100029 China
- School of Chemistry; Monash University; Clayton Campus VIC 3800 Australia
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Bauri K, Pan A, Haldar U, Narayanan A, De P. Exploring amino acid-tethered polymethacrylates as CO2-sensitive macromolecules: A concealed property. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28165] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kamal Bauri
- Polymer Research Centre, Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata, Mohanpur; 741246 Nadia West Bengal India
| | - Abhishek Pan
- Polymer Research Centre, Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata, Mohanpur; 741246 Nadia West Bengal India
| | - Ujjal Haldar
- Polymer Research Centre, Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata, Mohanpur; 741246 Nadia West Bengal India
| | - Amal Narayanan
- Polymer Research Centre, Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata, Mohanpur; 741246 Nadia West Bengal India
| | - Priyadarsi De
- Polymer Research Centre, Department of Chemical Sciences; Indian Institute of Science Education and Research Kolkata, Mohanpur; 741246 Nadia West Bengal India
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Bauri K, Narayanan A, Haldar U, De P. Polymerization-induced self-assembly driving chiral nanostructured materials. Polym Chem 2015. [DOI: 10.1039/c5py00919g] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Amino acid coated chiral nanostructured soft materials are made by the polymerization induced self-assembly (PISA) technique, where the post-polymerization chemical group transformation leads to a morphological transition.
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Affiliation(s)
- Kamal Bauri
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur-741246, Nadia
- India
| | - Amal Narayanan
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur-741246, Nadia
- India
| | - Ujjal Haldar
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur-741246, Nadia
- India
| | - Priyadarsi De
- Polymer Research Centre
- Department of Chemical Sciences
- Indian Institute of Science Education and Research Kolkata
- Mohanpur-741246, Nadia
- India
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