1
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Liu D, Yang K, Xu L, Shen X, Feng L, Jiang Y, Ali A, Lu J, Guo L. Self-Assembly Study of Block Co polypeptoids in Response to pH and Temperature Stimulation. Polymers (Basel) 2024; 16:1082. [PMID: 38675001 PMCID: PMC11053516 DOI: 10.3390/polym16081082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 04/05/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Polypeptoids with well-designed structures have the ability to self-assemble into nanomaterials, which have wide potential applications. In this study, a series of diblock copolypeptoids were synthesized via ring-opening polymerization followed by click chemistry and exhibited both temperature and pH stimulation responsiveness. Under specific temperature and pH conditions, the responsive blocks in the copolypeptoids became hydrophobic and aggregated to form micelles. The self-assembly process was monitored using the UV-Vis and DLS methods, which suggested the reversible transition of free molecules to micelles and bigger aggregates upon instituting temperature and pH changes. By altering the length and proportion of each block, the copolypeptoids displayed varying self-assembly characteristics, and the transition temperature could be tuned. With good biocompatibility, stability, and no cytotoxicity, the polypeptoids reported in this study are expected to be applied as bionanomaterials in fields including drug delivery, tissue engineering, and intelligent biosensing.
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Affiliation(s)
| | | | | | | | | | | | | | - Jianwei Lu
- School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Li Guo
- School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China
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2
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Liu D, Lin M, Shu L, Sun J, Chen X. A Versatile Supramolecular Assembly Platform for Tumor Microenvironment Motivated Drug Release and Ferroptosis Synergistic Therapy. Nano Lett 2023. [PMID: 37313864 DOI: 10.1021/acs.nanolett.3c01440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
We report a simplistic approach that employs complexation between poly(N-allylglycine) modified with 3-mercaptoacetic acid (PNAG-COOH) and a series of metal ions to construct a new type of supramolecular architecture with intriguing features that enable a versatile and advanced nanoplatform. In most cases, such complexation results in nanoscale vesicles with superior stability, which differs significantly from the precipitates of conventional carbon-chain polymers and polypeptides. We attribute this to the polar tertiary amide groups in the polypeptoid backbone that offer excellent water affinity and numerous noncovalent molecular interactions. Particularly, the PNAG-COOH/Fe2+ complex can generate reactive oxygen species via a Fenton reaction in the presence of H2O2, thus causing ferroptosis selectively in the tumor cell. In addition, a H2O2-modulated intracellular in situ morphology transition enables prompt release of doxorubicin, representing a synergistic target antitumor efficacy. The prepared supramolecular platforms present promising candidates for many applications, considering the ability to assemble with various metal ions.
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Affiliation(s)
- Dandan Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
- College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Min Lin
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Lilei Shu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Jing Sun
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Xuesi Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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3
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Zhang Z, Chen H, Wang Y, Zhang N, Trépout S, Tang BZ, Gasser G, Li MH. Polymersomes with Red/Near-Infrared Emission and Reactive Oxygen Species Generation. Macromol Rapid Commun 2023; 44:e2200716. [PMID: 36254854 DOI: 10.1002/marc.202200716] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/30/2022] [Indexed: 11/09/2022]
Abstract
In photodynamic therapy (PDT), the uses of nanoparticles bearing photosensitizers (PSs) can overcome some of the drawbacks of using a PS alone (e.g., poor water solubility and low tumor selectivity). However, numerous nano-formulations are developed by physical encapsulation of PSs through Van der Waals interactions, which have not only a limited load efficiency but also some in vivo biodistribution problems caused by leakage or burst release. Herein, polymersomes made from an amphiphilic block copolymer, in which a PS with aggregation-induced emission (AIE-PS) is covalently attached to its hydrophobic poly(amino acid) block, are reported. These AIE-PS polymersomes dispersed in aqueous solution have a high AIE-PS load efficiency (up to 46% as a mass fraction), a hydrodynamic diameter of 86 nm that is suitable for in vivo applications, and an excellent colloidal stability for at least 1 month. They exhibit a red/near-infrared photoluminescence and ability to generate reactive oxygen species (ROS) under visible light. They are non-cytotoxic in the dark as tested on Hela cells up to concentration of 100 µm. Benefiting from colloidal stability, AIE property and ROS generation capability, such a family of polymersomes can be great candidates for image-guided PDT.
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Affiliation(s)
- Zhihua Zhang
- Chimie ParisTech, PSL Université Paris, CNRS, Institut de Recherche de Chimie Paris, UMR8247, 11 rue Pierre et Marie Curie, Paris, 75005, France
| | - Hui Chen
- Chimie ParisTech, PSL Université Paris, CNRS, Institut de Recherche de Chimie Paris, UMR8247, 11 rue Pierre et Marie Curie, Paris, 75005, France
| | - Youchao Wang
- Chimie ParisTech, PSL Université Paris, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemistry, 11 rue Pierre et Marie Curie, Paris, 75005, France
| | - Nian Zhang
- Chimie ParisTech, PSL Université Paris, CNRS, Institut de Recherche de Chimie Paris, UMR8247, 11 rue Pierre et Marie Curie, Paris, 75005, France
| | - Sylvain Trépout
- Institut Curie, Université Paris-Saclay, Inserm US43, CNRS UMS2016, Centre Universitaire, Bât. 101B-110-111-112, Rue Henri Becquerel, CS 90030, Orsay, Cedex, 91401, France
| | - Ben Zhong Tang
- School of Science and Engineering, Shenzhen Key Laboratory of Functional Aggregate Materials, The Chinese University of Hong Kong, Shenzhen, Guangdong, 518172, China
| | - Gilles Gasser
- Chimie ParisTech, PSL Université Paris, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemistry, 11 rue Pierre et Marie Curie, Paris, 75005, France
| | - Min-Hui Li
- Chimie ParisTech, PSL Université Paris, CNRS, Institut de Recherche de Chimie Paris, UMR8247, 11 rue Pierre et Marie Curie, Paris, 75005, France
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4
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Ding X, Liu D, Jiang X, Chen X, Zuckermann RN, Sun J. Hierarchical Approach for Controlled Assembly of Branched Nanostructures from One Polymer Compound by Engineering Crystalline Domains. ACS Nano 2022; 16:10470-10481. [PMID: 35638769 DOI: 10.1021/acsnano.2c01171] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The interplay of crystalline packing, which governs atomic length-scale order, and hierarchical assembly, which governs longer length scales, is essential to fabricate complex superstructures from polymers for many applications. Here, we demonstrate that a diblock copolymer containing an N-octylglycine peptoid block, which has a propensity to crystallize, can form distinct hierarchical superstructures including a star-like morphology, a superbrush, or a nanosheet by tuning the balance between surface energy arising from the solubility of the copolymers and crystallization energy of the solvophobic polypeptoid blocks. We show that partially ordered micellar aggregates (clusters) are key intermediates that form early in the assembly process and template the formation of superstructures via the oriented fusion of individual micelles as the growth materials. Notably, the fiber-like branch of the superstructures is driven by crystallization and exhibits growth in a living linear manner. The superstructures can be internalized by mammalian cells and hold promise for biomedical applications.
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Affiliation(s)
- Xiangmin Ding
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Dandan Liu
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xi Jiang
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Xuesi Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Ronald N Zuckermann
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Jing Sun
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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5
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Abstract
Peptoids have attracted attention for application in biomedicine due to their advantageous properties as compared to peptides. The structural analogues are typically resistant to protease degradation and offer improved biocompatibility. Chemical routes to an impressive variety of short-chain, low-molecular-weight peptoids are well-established. However, synthetic methods for well-defined, high-molecular-weight polypeptoids with side chain diversity are still in their infancy. Here, we report a facile method for synthesis of polypeptoids via transition-metal-catalyzed controlled, living polymerization of N-substituted N-carboxyanhydrides. Our method is amenable to hydrophilic and hydrophobic side chains and yields high-molecular-weight linear polypeptoids of predictable length and low dispersity. Further, the polymer end groups can be tuned for biological targeting, and polypeptide-polypeptoid hybrids are readily prepared in one pot. Our materials are indeed resistant to common proteases and are well-tolerated by human cells. Overall, this work represents a significant stride toward access to tunable polypeptoids.
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Affiliation(s)
- Zachary S Clauss
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Jessica R Kramer
- Department of Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
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6
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DeStefano A, Segalman RA, Davidson EC. Where Biology and Traditional Polymers Meet: The Potential of Associating Sequence-Defined Polymers for Materials Science. JACS Au 2021; 1:1556-1571. [PMID: 34723259 PMCID: PMC8549048 DOI: 10.1021/jacsau.1c00297] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Indexed: 05/08/2023]
Abstract
Polymers with precisely defined monomeric sequences present an exquisite tool for controlling material properties by harnessing both the robustness of synthetic polymers and the ability to tailor the inter- and intramolecular interactions so crucial to many biological materials. While polymer scientists traditionally synthesized and studied the physics of long molecules best described by their statistical nature, many biological polymers derive their highly tailored functions from precisely controlled sequences. Therefore, significant effort has been applied toward developing new methods of synthesizing, characterizing, and understanding the physics of non-natural sequence-defined polymers. This perspective considers the synergistic advantages that can be achieved via tailoring both precise sequence control and attributes of traditional polymers in a single system. Here, we focus on the potential of sequence-defined polymers in highly associating systems, with a focus on the unique properties, such as enhanced proton conductivity, that can be attained by incorporating sequence. In particular, we examine these materials as key model systems for studying previously unresolvable questions in polymer physics including the role of chain shape near interfaces and how to tailor compatibilization between dissimilar polymer blocks. Finally, we discuss the critical challenges-in particular, truly scalable synthetic approaches, characterization and modeling tools, and robust control and understanding of assembly pathways-that must be overcome for sequence-defined polymers to attain their potential and achieve ubiquity.
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Affiliation(s)
- Audra
J. DeStefano
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Rachel A. Segalman
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
- Department
of Materials, University of California, Santa Barbara, California 93106, United States
| | - Emily C. Davidson
- Department
of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey 08544, United States
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7
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Wei T, Wu J, Shen X, Qiu Z, Guo L. Self-Assembled Membrane-like Nanomaterials from Sequence-Defined Peptoid Block Copolymers. Polymers (Basel) 2021; 13:2389. [PMID: 34371992 DOI: 10.3390/polym13152389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/17/2021] [Accepted: 07/18/2021] [Indexed: 11/17/2022] Open
Abstract
Sequentially defined membrane-like nanomaterials have potential applications in biomedical and chemical fields due to their unique physical and chemical properties. However, these natural and synthetic nanomaterials have not been widely developed due to their complicated molecular sequence and structure, difficulties in synthesis etc. Here, we report a stable membrane-like nanomaterial composed of a monolayer or bilayer that was self-assembled from sequence-defined amphiphilic peptoid triblock (poly(N-aminoethyl glycine)-b-poly(N-octyl glycine)-b-poly(N-carboxyethyl glycine)) and diblock (poly(N-carboxyethyl glycine)-b-poly(N-octyl glycine) and poly(N-aminoethyl glycine)-b-poly(N-octyl glycine)) copolymers separately. A series of peptoid block copolymers were synthesized, and it was observed that long alkyl side chains and abundant hydrophobic blocks were necessary to form the membranes. The prepared membrane-like nanomaterials were fairly stable. They did not change obviously in shape and size with time, and they can survive after sonication. This study is expected to enrich the nanomaterial family, as well as polypeptoid science, and expand their applications in biomedicine and other fields.
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8
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Fang R, Pi J, Wei T, Ali A, Guo L. Stimulus-Responsive Polymers Based on Polypeptoid Skeletons. Polymers (Basel) 2021; 13:2089. [PMID: 34202869 PMCID: PMC8271857 DOI: 10.3390/polym13132089] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 12/13/2022] Open
Abstract
Polypeptoids have attracted a lot of atteSDntion because of their unique structural characteristics and special properties. Polypeptoids have the same main chain structures to polypeptides, making them have low cytotoxicity and excellent biocompatibility. Polypeptoids can also respond to external environmental changes by modifying the configurations of the side chains. The external stimuli can be heat, pH, ions, ultraviolet/visible light and active oxygen or their combinations. This review paper discussed the recent research progress in the field of stimulus-responsive polypeptoids, including the design of new stimulus-responsive polypeptoid structures, controlled actuation factors in response to external stimuli and the application of responsive polypeptoid biomaterials in various biomedical and biological nanotechnology, such as drug delivery, tissue engineering and biosensing.
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Affiliation(s)
| | | | | | - Amjad Ali
- Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China; (R.F.); (J.P.); (T.W.)
| | - Li Guo
- Research School of Polymeric Materials, School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, China; (R.F.); (J.P.); (T.W.)
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9
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Bai T, Zheng B, Ling J. Density Functional Theory Studies on the Synthesis of Poly(α-Amino Acid)s Via the Amine-Mediated Ring Opening Polymerizations of N-Carboxyanhydrides and N-Thiocarboxyanhydrides. Front Chem 2021; 9:645949. [PMID: 33855011 PMCID: PMC8039441 DOI: 10.3389/fchem.2021.645949] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/17/2021] [Indexed: 11/13/2022] Open
Abstract
To synthesize well-defined poly (α-amino acid)s (PAAs), ring opening polymerizations (ROP) of cyclic monomers of α-amino acid N-carboxyanhydrides (NCAs) and N-thiocarboxyanhydrides (NTAs) are most widely used. In this mini-review, we summarize the mechanism details of the monomer preparation and ROP. The present study used density functional theory calculations to reveal the mechanisms together with experimental phenomena in the past decades. Detailed discussion includes normal amine mechanism and the selectivity of the initiators bearing various nucleophilic groups.
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Affiliation(s)
| | | | - Jun Ling
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, China
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10
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Sun J, Wang Z, Zhu C, Wang M, Shi Z, Wei Y, Fu X, Chen X, Zuckermann RN. Hierarchical supramolecular assembly of a single peptoid polymer into a planar nanobrush with two distinct molecular packing motifs. Proc Natl Acad Sci U S A 2020; 117:31639-47. [PMID: 33262279 DOI: 10.1073/pnas.2011816117] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hierarchical nanomaterials have received increasing interest for many applications. Here, we report a facile programmable strategy based on an embedded segmental crystallinity design to prepare unprecedented supramolecular planar nanobrush-like structures composed of two distinct molecular packing motifs, by the self-assembly of one particular diblock copolymer poly(ethylene glycol)-block-poly(N-octylglycine) in a one-pot preparation. We demonstrate that the superstructures result from the temperature-controlled hierarchical self-assembly of preformed spherical micelles by optimizing the crystallization-solvophobicity balance. Particularly remarkable is that these micelles first assemble into linear arrays at elevated temperatures, which, upon cooling, subsequently template further lateral, crystallization-driven assembly in a living manner. Addition of the diblock copolymer chains to the growing nanostructure occurs via a loosely organized micellar intermediate state, which undergoes an unfolding transition to the final crystalline state in the nanobrush. This assembly mechanism is distinct from previous crystallization-driven approaches which occur via unimer addition, and is more akin to protein crystallization. Interestingly, nanobrush formation is conserved over a variety of preparation pathways. The precise control ability over the superstructure, combined with the excellent biocompatibility of polypeptoids, offers great potential for nanomaterials inaccessible previously for a broad range of advanced applications.
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11
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Yang X, Wang Z, Sun J. Morphological Transitions of Photoresponsive Vesicles from Amphiphilic Polypeptoid Copolymers for Controlled Release. Polymers (Basel) 2020; 12:E798. [PMID: 32260046 PMCID: PMC7240382 DOI: 10.3390/polym12040798] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 03/26/2020] [Indexed: 01/20/2023] Open
Abstract
Photoresponsive polymers have attracted increasing interest for a variety of applications. Here, we report a family of photoresponsive polypeptoid-based copolymer poly(ethylene glycol)-b-poly(N-(S-(o-nitrobenzyl)-thioethyl) glycine)-co-poly(N-(2-phenylethyl) glycine) (PEG-b-PNSN-co-PNPE) synthesized by the controlled ring-opening polymerization (ROP) technique. The key feature of the design is to incorporate both o-nitrobenzyl group moiety to offer the photoresponsive property and phenethyl residues to tune the structural and amphiphilic property of the system. We demonstrate that the cleavage degree of the o-nitrobenzyl group can reach to 100% upon UV-irradiation. With delicate design, a photoresponsive vesicle-to-sphere transition has been observed that facilitates the release of the encapsulants. This work provides a facile approach to prepare a type of photoresponsive polymers with tunable properties for drug delivery.
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Affiliation(s)
| | | | - Jing Sun
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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12
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Zhu L, Simpson JM, Xu X, He H, Zhang D, Yin L. Cationic Polypeptoids with Optimized Molecular Characteristics toward Efficient Nonviral Gene Delivery. ACS Appl Mater Interfaces 2017; 9:23476-23486. [PMID: 28653538 DOI: 10.1021/acsami.7b06031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The rational design of gene vectors relies on the understanding of their structure-property relationship. Polypeptoids, which are structural isomers of natural polypeptides, hold great potential as gene delivery vectors due to their facile preparation, structural tunability, and most importantly, their desirable proteolytic stability. We herein designed a library of polypeptoids with different cationic side-chain terminal groups, degree of polymerizations (DPs), side-chain lengths, and incorporated aliphatic side chains, to unravel the structure-property relationships so that gene delivery efficiency can be maximized and cytotoxicity can be minimized. In HeLa cells, a polypeptoid bearing a primary amine side-chain terminal group exhibited remarkably higher transfection efficiency than that of its analogues containing secondary, tertiary, or quaternary amine groups. Elongation of the polypeptoid backbone length (from 28 to 251 mer) led to enhanced DNA condensation as well as cellular uptake levels, however it also caused higher cytotoxicity. Upon a proper balance between DNA uptake and cytotoxicity, the polypeptoid with a DP of 46 afforded the highest transfection efficiency. Elongating the aliphatic spacer between the backbone and side amine groups enhanced the hydrophobicity of the side chains, which resulted in notably increased membrane activities and transfection efficiency. Further incorporation of hydrophobic decyl side chains led to an improvement in transfection efficiency of ∼6 fold. The top-performing material identified, P11, mediated successful gene transfection under serum-containing conditions, outperforming the commercial transfection reagent poly(ethylenimine) by nearly 4 orders of magnitude. Reflecting its excellent serum-resistant properties, P11 further enabled effective transfection in vivo following intratumoral injection to melanoma-bearing mice. This study will help the rational design of polypeptoid-based gene delivery materials, and the best-performing material identified may provide a potential supplement to existing gene vectors.
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Affiliation(s)
- Lipeng Zhu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University , Suzhou 215123, P. R. China
| | - Jessica M Simpson
- Department of Chemistry and Macromolecular Studies Group, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Xin Xu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University , Suzhou 215123, P. R. China
| | - Hua He
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University , Suzhou 215123, P. R. China
| | - Donghui Zhang
- Department of Chemistry and Macromolecular Studies Group, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Lichen Yin
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University , Suzhou 215123, P. R. China
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13
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Ryu JY, Song IT, Lau KHA, Messersmith P, Yoon TY, Lee H. New antifouling platform characterized by single-molecule imaging. ACS Appl Mater Interfaces 2014; 6:3553-3558. [PMID: 24503420 PMCID: PMC3985779 DOI: 10.1021/am4057387] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 02/06/2014] [Indexed: 05/31/2023]
Abstract
Antifouling surfaces have been widely studied for their importance in medical devices and industry. Antifouling surfaces mostly achieved by methoxy-poly(ethylene glycol) (mPEG) have shown biomolecular adsorption less than 1 ng/cm(2) which was measured by surface analytical tools such as surface plasmon resonance (SPR) spectroscopy, quartz crystal microbalance (QCM), or optical waveguide lightmode (OWL) spectroscopy. Herein, we utilize a single-molecule imaging technique (i.e., an ultimate resolution) to study antifouling properties of functionalized surfaces. We found that about 600 immunoglobulin G (IgG) molecules are adsorbed. This result corresponds to ∼5 pg/cm(2) adsorption, which is far below amount for the detection limit of the conventional tools. Furthermore, we developed a new antifouling platform that exhibits improved antifouling performance that shows only 78 IgG molecules adsorbed (∼0.5 pg/cm(2)). The antifouling platform consists of forming 1 nm TiO2 thin layer, on which peptidomimetic antifouling polymer (PMAP) is robustly anchored. The unprecedented antifouling performance can potentially revolutionize a variety of research fields such as single-molecule imaging, medical devices, biosensors, and others.
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Affiliation(s)
- Ji Young Ryu
- Department
of Chemistry, National Creative Research Initiative Center for Single-Molecule
Systems Biology, and Department of Physics, KAIST, 291 University Rd., Daejeon 305-701, Republic
of Korea
| | - In Taek Song
- Department
of Chemistry, National Creative Research Initiative Center for Single-Molecule
Systems Biology, and Department of Physics, KAIST, 291 University Rd., Daejeon 305-701, Republic
of Korea
| | - K. H. Aaron Lau
- Biomedical Engineering Department, Northwestern University, Evanston, Illinois 60208, United States
| | - Phillip
B. Messersmith
- Biomedical Engineering Department, Northwestern University, Evanston, Illinois 60208, United States
| | - Tae-Young Yoon
- Department
of Chemistry, National Creative Research Initiative Center for Single-Molecule
Systems Biology, and Department of Physics, KAIST, 291 University Rd., Daejeon 305-701, Republic
of Korea
| | - Haeshin Lee
- Department
of Chemistry, National Creative Research Initiative Center for Single-Molecule
Systems Biology, and Department of Physics, KAIST, 291 University Rd., Daejeon 305-701, Republic
of Korea
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14
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Schneider M, Fetsch C, Amin I, Jordan R, Luxenhofer R. Polypeptoid brushes by surface-initiated polymerization of N-substituted glycine N-carboxyanhydrides. Langmuir 2013; 29:6983-8. [PMID: 23663172 PMCID: PMC3932499 DOI: 10.1021/la4009174] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Polypeptoid brushes were synthesized by surface-initiated polymerization of N-substituted glycine N-carboxyanhydrides on self-assembled amine monolayers. Using the presented grafting-from approach, polypeptoid brush thicknesses of approximately 40 nm could be obtained as compared to previously reported brush thicknesses of 4 nm. Moreover, hydrophilic, hydrophobic and amphiphilic polymer brushes were realized which are expected to have valuable applications as nonfouling surfaces and as model or references systems for surface grafted polypeptides.
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Affiliation(s)
- Maximilian Schneider
- Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Corinna Fetsch
- Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
- Functional Polymer Materials, Chair for Chemical Technology of Materials Synthesis, University Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Ihsan Amin
- Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Rainer Jordan
- Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
| | - Robert Luxenhofer
- Professur für Makromolekulare Chemie, Department Chemie, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany
- Functional Polymer Materials, Chair for Chemical Technology of Materials Synthesis, University Würzburg, Röntgenring 11, 97070 Würzburg, Germany
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Abstract
Surface modification techniques that create surfaces capable of killing adherent bacteria are promising solutions to infections associated with implantable medical devices. Antimicrobial (AM) peptoid oligomers (ampetoids) that were designed to mimic helical AM peptides were synthesised with a peptoid spacer chain to allow mobility and an adhesive peptide moiety for easy and robust immobilisation onto substrata. TiO(2) substrata were modified with the ampetoids and subsequently backfilled with an antifouling (AF) polypeptoid polymer in order to create polymer surface coatings composed of both AM (active) and AF (passive) peptoid functionalities. Confocal microscopy images showed that the membranes of adherent E. coli cells were damaged after 2-h exposure to the modified substrata, suggesting that ampetoids retain AM properties even when immobilised on substrata.
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Affiliation(s)
- Andrea R. Statz
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
| | - Jong Pil Park
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
| | - Nathaniel P. Chongsiriwatana
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
| | - Annelise E. Barron
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
- Institute for Bionanotechnology in Medicine, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
| | - Phillip B. Messersmith
- Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
- Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
- Institute for Bionanotechnology in Medicine, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208
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