1
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Gioldasis C, Gkamas A, Vlahos C. Impact of Copolymer Architecture on Demicellization and Cargo Release via Head-to-Tail Depolymerization of Hydrophobic Blocks or Branches. Polymers (Basel) 2024; 16:1127. [PMID: 38675046 PMCID: PMC11053811 DOI: 10.3390/polym16081127] [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: 03/19/2024] [Revised: 04/07/2024] [Accepted: 04/13/2024] [Indexed: 04/28/2024] Open
Abstract
Utilizing molecular dynamics simulations, we explored the demicellization and cargo release dynamics of linear and miktoarm copolymers, featuring one, two, and three hydrophobic blocks or branches, each capable of head-to-tail depolymerization. Our findings revealed that, under stoichiometric trigger molecule concentrations, miktoarms with three branches exhibited consistently faster depolymerization rates than those with two branches and linear copolymers. Conversely, at constant trigger molecule concentrations, the depolymerization rates of copolymers exhibited more complex behaviors influenced by two opposing factors: the excess of trigger molecules, which increased with a decrease in the number of hydrophobic branches or blocks, and simultaneous head-to-tail depolymerization, which intensified with an increasing number of branches. Our study elucidates the intricate interplay between copolymer architecture, trigger molecule concentrations, and depolymerization dynamics, providing valuable insights for the rational design of amphiphilic copolymers with tunable demicellization and cargo release properties.
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Affiliation(s)
| | | | - Costas Vlahos
- Chemistry Department, University of Ioannina, 45110 Ioannina, Greece; (C.G.); (A.G.)
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2
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Zhang L, Krause TB, Deol H, Pandey B, Xiao Q, Park HM, Iverson BL, Law D, Anslyn EV. Chemical and linguistic considerations for encoding Chinese characters: an embodiment using chain-end degradable sequence-defined oligourethanes created by consecutive solid phase click chemistry. Chem Sci 2024; 15:5284-5293. [PMID: 38577351 PMCID: PMC10988576 DOI: 10.1039/d3sc06189b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/05/2024] [Indexed: 04/06/2024] Open
Abstract
Sequence-defined polymers (SDPs) are currently being investigated for use as information storage media. As the number of monomers in the SDPs increases, with a corresponding increase in mathematical base, the use of tandem-MS for de novo sequencing becomes more challenging. In contrast, chain-end degradation routines are truly de novo, potentially allowing very large mathematical bases for encoding. While alphabetic scripts have a few dozen symbols, logographic scripts, such as Chinese, can have several thousand symbols. Using a new in situ consecutive click reaction approach on an oligourethane backbone for writing, and a previously reported chain-end degradation routine for reading, we encoded/decoded a confucius proverb written in Chinese characters using two encoding schemes: Unicode and Zhèng Mă. Unicode is an internationally standardized arbitrary string of hexadecimal (base-16) symbols which efficiently encodes uniquely identifiable symbols but requires complete fidelity of transmission, or context-based inferential strategies to be interpreted. The Zhèng Mă approach encodes with a base-26 system using the visual characteristics and internal composition of Chinese characters themselves, which leads to greater ambiguity of encoded strings, but more robust retrievability of information from partial or corrupted encodings. The application of information-encoded oligourethanes to two different encoding systems allowed us to establish their flexibility and versatility for data storage. We found the oligourethanes immensely adaptable to both encoding schemes for Chinese characters, and we highlight the expected tradeoff between the efficiency and uniqueness of Unicode encoding on the one hand, and the fidelity to a scripts' particular visual characteristics on the other.
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Affiliation(s)
- Le Zhang
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Todd B Krause
- Linguistics Research Center, The University of Texas at Austin TX 78712 USA
| | - Harnimarta Deol
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Bipin Pandey
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Qifan Xiao
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Hyun Meen Park
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Brent L Iverson
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
| | - Danny Law
- Department of Linguistics, The University of Texas at Austin TX 78721 USA
- Linguistics Research Center, The University of Texas at Austin TX 78712 USA
| | - Eric V Anslyn
- Department of Chemistry, The University of Texas at Austin TX 78721 USA
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3
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Deng Z, Liang X, Gillies ER. Click to Self-immolation: A "Click" Functionalization Strategy towards Triggerable Self-Immolative Homopolymers and Block Copolymers. Angew Chem Int Ed Engl 2024; 63:e202317063. [PMID: 38029347 DOI: 10.1002/anie.202317063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/01/2023]
Abstract
Self-immolative polymers (SIPs) are a class of degradable macromolecules that undergo stimuli-triggered head-to-tail depolymerization. However, a general approach to readily end-functionalize SIP precursors for programmed degradation remains elusive, restricting access to complex, functional SIP-based materials. Here we present a "click to self-immolation" strategy based on aroyl azide-capped SIP precursors, enabling the facile construction of diverse SIPs with different trigger units through a Curtius rearrangement and alcohol/thiol-isocyanate "click" reaction. This strategy is also applied to polymer-polymer coupling to access fully depolymerizable block copolymer amphiphiles, even combining different SIP backbones. Our results demonstrate that the depolymerization can be actuated efficiently under physiologically-relevant conditions by the removal of the trigger units and ensuing self-immolation of the p-aminobenzyl carbonate linkage, indicating promise for controlled release applications involving nanoparticles and hydrogels.
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Affiliation(s)
- Zhengyu Deng
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Xiaoli Liang
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Elizabeth R Gillies
- Department of Chemistry, The University of Western Ontario, London, Ontario, N6A 5B7, Canada
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, N6A 5B9, Canada
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4
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Chen W, Guo C, Ding H, Yang X, Zhang K. Controlled Ring-Opening Polymerization of Macrocyclic Monomers Based on Ring-Opening/Ring-Closing Cascade Reaction. J Am Chem Soc 2023. [PMID: 37931244 DOI: 10.1021/jacs.3c10765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
The development of a controlled ring-opening polymerization (ROP) method for synthesizing backbone-functionalized and sequence-controlled polymers with well-defined architectures from macrocyclic monomers is highly desirable in polymer chemistry. Herein, we developed a novel general controlled ROP of macrocycles for producing backbone functional and sequence-controlled polyurethanes and polyamides with controlled molecular weights and narrow dispersities (Đ < 1.1). The key to this method is the introduction of a trimethyl lock unit, an efficient cyclization-based self-immolative spacer, into the macrocyclic monomer ring as a "ring-opening trigger." ROP is initiated by the attack of a primary amine nucleophile on the ring-activated carbonate/ester group, leading to the ring opening of the macrocyclic monomer. Subsequently, spontaneous 6-exo-trig cyclization of the trimethyl lock unit occurs, detaching this ring-opening trigger and regenerating the primary amine end group. The regenerated primary amine group can then be used to propagate the polymer chain by iterating the ring-opening-ring-closing cascade reaction. The versatile ROP method can be applied in the synthesis of water-soluble polyurethanes, backbone-degradable polyurethanes and poly(ester amide)s, and sequence-controlled poly(amino acid)s with well-defined macromolecular architectures.
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Affiliation(s)
- Wensen Chen
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changjuan Guo
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Ding
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xingyu Yang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Zhang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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5
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Deng Z, Gillies ER. Emerging Trends in the Chemistry of End-to-End Depolymerization. JACS AU 2023; 3:2436-2450. [PMID: 37772181 PMCID: PMC10523501 DOI: 10.1021/jacsau.3c00345] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/09/2023] [Accepted: 08/16/2023] [Indexed: 09/30/2023]
Abstract
Over the past couple of decades, polymers that depolymerize end-to-end upon cleavage of their backbone or activation of a terminal functional group, sometimes referred to as "self-immolative" polymers, have been attracting increasing attention. They are of growing interest in the context of enhancing polymer degradability but also in polymer recycling as they allow monomers to be regenerated in a controlled manner under mild conditions. Furthermore, they are highly promising for applications as smart materials due to their ability to provide an amplified response to a specific signal, as a single sensing event is translated into the generation of many small molecules through a cascade of reactions. From a chemistry perspective, end-to-end depolymerization relies on the principles of self-immolative linkers and polymer ceiling temperature (Tc). In this article, we will introduce the key chemical concepts and foundations of the field and then provide our perspective on recent exciting developments. For example, over the past few years, new depolymerizable backbones, including polyacetals, polydisulfides, polyesters, polythioesters, and polyalkenamers, have been developed, while modern approaches to depolymerize conventional backbones such as polymethacrylates have also been introduced. Progress has also been made on the topological evolution of depolymerizable systems, including the introduction of fully depolymerizable block copolymers, hyperbranched polymers, and polymer networks. Furthermore, precision sequence-defined oligomers have been synthesized and studied for data storage and encryption. Finally, our perspectives on future opportunities and challenges in the field will be discussed.
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Affiliation(s)
- Zhengyu Deng
- Department
of Chemistry, The University of Western
Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Elizabeth R. Gillies
- Department
of Chemistry, The University of Western
Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B9, Canada
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6
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Shi Q, Zhou X, Xu J, Zhang J, Wang N, Zhang G, Hu J, Liu S. Dendritic Quaternary-Encoded Oligourethanes for Data Encryption. Angew Chem Int Ed Engl 2023; 62:e202214695. [PMID: 36412223 DOI: 10.1002/anie.202214695] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/10/2022] [Accepted: 11/22/2022] [Indexed: 11/23/2022]
Abstract
The use of sequence-defined digital polymers for data storage and encryption has received increasing attention due to their precision structures similar to natural biomacromolecules (e.g., DNA) but increased stability. However, the rapid development of sequencing techniques raises the concern of information leakage. Herein, dendritic quaternary-encoded oligourethanes bearing a photoresponsive trigger, self-immolative backbones, and a mass spectrometry tag of PEG dendron have been developed for data encryption. Although the sequence information in linear analogs can be readily deciphered by mass spectrometry, sequencing of dendritic oligourethanes cannot be achieved by either primary MS or tandem MS/MS owing to the unique spatial conformation. Intriguingly, the fragmentation pathways of a quaternary dendrimer under MS/MS conditions can be converted to 2772-bit 2D matrices with ≈1.98×1087 permutations, serving as high-strength encryption keys for highly reliable data encryption.
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Affiliation(s)
- Qiangqiang Shi
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Xin Zhou
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Jie Xu
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Jialin Zhang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Ning Wang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Guoying Zhang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Jinming Hu
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Shiyong Liu
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
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7
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Zong Q, Li J, Xiao X, Du X, Yuan Y. Self-amplified chain-shattering cinnamaldehyde-based poly(thioacetal) boosts cancer chemo-immunotherapy. Acta Biomater 2022; 154:97-107. [PMID: 36210042 DOI: 10.1016/j.actbio.2022.09.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/03/2022] [Accepted: 09/26/2022] [Indexed: 12/14/2022]
Abstract
The selective activation of stimuli-responsive polymers in the tumor microenvironment is a great concern to achieve intelligent cancer therapy, but most of them show inadequate response due to insufficient endogenous triggering agents. Herein, we rationally designed a reactive oxygen species (ROS)-responsive cinnamaldehyde (CA)-based poly(thioacetal), consisting of ROS-responsive thioacetal (TA) and ROS-generating agent CA, with self-amplified chain-shattering polymer degradation. The mechanism of self-amplified chain-shattering is that endogenous ROS as a triggering agent facilitates chain cleavage of TA with the release of CA, which in turn produces more ROS through mitochondrial dysfunction, resulting in an exponential polymer degradation cascade. The polymer can be further modified with anticancer drug doxorubicin (DOX) for cooperative amplification of oxidative stress and immunogenic cell death (ICD) of tumor cells, thereby boosting the effect of chemo-immunotherapy. The self-amplified chain-shattering polymer designed in this work holds great promise in developing stimuli-responsive polymers for efficient drug delivery. STATEMENT OF SIGNIFICANCE: This study presented an approach to utilize self-amplified chain-shattering cinnamaldehyde-based poly (thioacetal) as a drug delivery system to restrain tumor growth and boost chemo-immunotherapy. The endogenous ROS as a triggering agent initiates the chain cleavage with the release of CA, which in turn produces ROS through mitochondria dysfunction, resulting in an exponential polymer degradation cascade and rapid drug release.
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Affiliation(s)
- Qingyu Zong
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Jisi Li
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China
| | - Xuan Xiao
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou, 511442, PR China; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou, 510006, PR China
| | - Xiaojiao Du
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China.
| | - Youyong Yuan
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China; Guangdong Provincial Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou 510006, PR China.
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8
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Tu Y, Xiao X, Dong Y, Li J, Liu Y, Zong Q, Yuan Y. Cinnamaldehyde-based poly(thioacetal): A ROS-awakened self-amplifying degradable polymer for enhanced cancer immunotherapy. Biomaterials 2022; 289:121795. [PMID: 36108580 DOI: 10.1016/j.biomaterials.2022.121795] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 08/27/2022] [Accepted: 09/02/2022] [Indexed: 11/19/2022]
Abstract
Although stimuli-responsive polymers have emerged as promising strategies for intelligent cancer therapy, limited polymer degradation and insufficient drug release remain a challenge. Here, we report a novel reactive oxygen species (ROS)-awakened self-amplifying degradable cinnamaldehyde (CA)-based poly(thioacetal) polymer. The polymer consists of ROS responsive thioacetal (TA) group and CA as the ROS generation agent. The self-amplified polymer degradation process is triggered by endogenous ROS-induced cleavage of the TA group to release CA. The CA released then promotes the generation of more ROS through mitochondrial dysfunction, resulting in amplified polymer degradation. More importantly, poly(thioacetal) itself can trigger immunogenic cell death (ICD) of the tumor cells and its side chains can be conjugated with indoleamine 2,3-dioxygenase 1 (IDO-1) inhibitor to reverse the immunosuppressive tumor microenvironment for synergistic cancer immunotherapy. The self-amplified degradable poly(thioacetal) developed in this work provides insights into the development of novel stimulus-responsive polymers for enhanced cancer immunotherapy.
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Affiliation(s)
- Yalan Tu
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Xuan Xiao
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou, 511442, PR China; Guangdong Provincial Key Laboratory of Biomedical Engineering, South China University of Technology, Guangzhou, 510006, PR China
| | - Yansong Dong
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Jisi Li
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou, 510006, PR China
| | - Ye Liu
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Qingyu Zong
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China
| | - Youyong Yuan
- School of Medicine, South China University of Technology, Guangzhou, 510006, PR China; School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou, 511442, PR China; National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China.
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9
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Montasell MC, Monge P, Carmali S, Dias Loiola LM, Andersen DG, Løvschall KB, Søgaard AB, Kristensen MM, Pütz JM, Zelikin AN. Chemical zymogens for the protein cysteinome. Nat Commun 2022; 13:4861. [PMID: 35982075 PMCID: PMC9388531 DOI: 10.1038/s41467-022-32609-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/08/2022] [Indexed: 12/18/2022] Open
Abstract
We present three classes of chemical zymogens established around the protein cysteinome. In each case, the cysteine thiol group was converted into a mixed disulfide: with a small molecule, a non-degradable polymer, or with a fast-depolymerizing fuse polymer (ZLA). The latter was a polydisulfide based on naturally occurring molecule, lipoic acid. Zymogen designs were applied to cysteine proteases and a kinase. In each case, enzymatic activity was successfully masked in full and reactivated by small molecule reducing agents. However, only ZLA could be reactivated by protein activators, demonstrating that the macromolecular fuse escapes the steric bulk created by the protein globule, collects activation signal in solution, and relays it to the active site of the enzyme. This afforded first-in-class chemical zymogens that are activated via protein-protein interactions. We also document zymogen exchange reactions whereby the polydisulfide is transferred between the interacting proteins via the "chain transfer" bioconjugation mechanism.
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Affiliation(s)
| | - Pere Monge
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark
| | - Sheiliza Carmali
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark.,School of Pharmacy, Queen's University Belfast, Belfast, UK
| | | | - Dante Guldbrandsen Andersen
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark.,iNano Interdisciplinary Nanoscience Centre, Aarhus University, 8000, Aarhus, Denmark
| | | | - Ane Bretschneider Søgaard
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark.,iNano Interdisciplinary Nanoscience Centre, Aarhus University, 8000, Aarhus, Denmark
| | | | | | - Alexander N Zelikin
- Department of Chemistry, Aarhus University, 8000, Aarhus, Denmark. .,iNano Interdisciplinary Nanoscience Centre, Aarhus University, 8000, Aarhus, Denmark.
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10
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Hansen-Felby M, Henriksen ML, Pedersen SU, Daasbjerg K. Postfunctionalization of Self-Immolative Poly(dithiothreitol) Using Steglich Esterification. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00551] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Magnus Hansen-Felby
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, Aarhus C DK-8000, Denmark
| | - Martin Lahn Henriksen
- Department of Biological and Chemical Engineering, Aarhus University, Aabogade 40, Aarhus N DK-8200, Denmark
| | - Steen Uttrup Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, Aarhus C DK-8000, Denmark
| | - Kim Daasbjerg
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Langelandsgade 140, Aarhus C DK-8000, Denmark
- Novo Nordisk Foundation CO2 Research Center, Aarhus University, Gustav Wieds Vej 14, Aarhus C DK-8000, Denmark
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11
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Gavriel A, Sambrook M, Russell AT, Hayes W. Recent advances in self-immolative linkers and their applications in polymeric reporting systems. Polym Chem 2022. [DOI: 10.1039/d2py00414c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Interest in self-immolative chemistry has grown over the past decade with more research groups harnessing the versatility to control the release of a compound from a larger chemical entity, given...
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12
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Yuan J, Giardino GJ, Niu J. Metathesis Cascade-Triggered Depolymerization of Enyne Self-Immolative Polymers*. Angew Chem Int Ed Engl 2021; 60:24800-24805. [PMID: 34453402 DOI: 10.1002/anie.202108239] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/27/2021] [Indexed: 11/10/2022]
Abstract
A novel class of enyne self-immolative polymers (SIPs) capable of metathesis cascade-triggered depolymerization is reported. Studies on model compounds established 1,6-enyne structures for efficient metathesis cascade reactions. SIPs incorporating the optimized 1,6-enyne motif were prepared via both polycondensation and iterative exponential growth approaches. These SIPs demonstrated excellent stability in strong acid, base, nucleophiles, or at elevated temperatures, and can undergo efficient and complete depolymerization once triggered by a metathesis catalyst. Further studies revealed that introducing a terminal alkene to the chain end of the enyne SIPs improved the depolymerization efficiency, and established their potential as stimuli-responsive materials.
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Affiliation(s)
- Jingsong Yuan
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Gavin J Giardino
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
| | - Jia Niu
- Department of Chemistry, Boston College, Chestnut Hill, MA, 02467, USA
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13
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Yuan J, Giardino GJ, Niu J. Metathesis Cascade‐Triggered Depolymerization of Enyne Self‐Immolative Polymers**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202108239] [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]
Affiliation(s)
- Jingsong Yuan
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
| | | | - Jia Niu
- Department of Chemistry Boston College Chestnut Hill MA 02467 USA
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14
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Zhang C, Kermaniyan S, Smith SA, Gillies ER, Such GK. Acid-Responsive Poly(glyoxylate) Self-Immolative Star Polymers. Biomacromolecules 2021; 22:3892-3900. [PMID: 34410113 DOI: 10.1021/acs.biomac.1c00694] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Self-immolative polymers have significant potential for applications such as drug or gene delivery. However, to realize this potential, such materials need to be customized to respond to specific variations in biological conditions. In this work, we investigated the design of new star-shaped self-immolative poly(ethyl glyoxylate)s (PEtGs) and their incorporation into responsive nanoparticles. PEtGs are a subclass of stimulus-responsive self-immolative polymers, which can be combined with different stimuli-responsive functionalities. Two different tetrathiol initiators were used for the polymerization in combination with a variety of potential pH-responsive end-caps, yielding a library of star PEtG polymers which were responsive to pH. Characterization of the depolymerization behavior of the polymers showed that the depolymerization rate was controlled by the end caps rather than the architecture of the polymer. A selection of the star polymers were modified with amines to allow introduction of charge-shifting properties. It was shown that pH-responsive nanoparticles could be prepared from these modified polymers and they demonstrated pH-dependent particle disruption. The pH responsiveness of these particles was studied by dynamic light scattering and 1H nuclear magnetic resonance spectroscopy.
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Affiliation(s)
- Changhe Zhang
- The School of Chemistry, The University of Melbourne, Parkville 3010 Victoria, Australia
| | - Sarah Kermaniyan
- The School of Chemistry, The University of Melbourne, Parkville 3010 Victoria, Australia
| | - Samuel A Smith
- The School of Chemistry, The University of Melbourne, Parkville 3010 Victoria, Australia
| | - Elizabeth R Gillies
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research and Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Georgina K Such
- The School of Chemistry, The University of Melbourne, Parkville 3010 Victoria, Australia
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15
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Tan J, Deng Z, Song C, Xu J, Zhang Y, Yu Y, Hu J, Liu S. Coordinating External and Built-In Triggers for Tunable Degradation of Polymeric Nanoparticles via Cycle Amplification. J Am Chem Soc 2021; 143:13738-13748. [PMID: 34411484 DOI: 10.1021/jacs.1c05617] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The selective activation of nanovectors in pathological tissues is of crucial importance to achieve optimized therapeutic outcomes. However, conventional stimuli-responsive nanovectors lack sufficient sensitivity because of the slight difference between pathological and normal tissues. To this end, the development of nanovectors capable of responding to weak pathological stimuli is of increasing interest. Herein, we report the fabrication of amphiphilic polyurethane nanoparticles containing both external and built-in triggers. The activation of external triggers leads to the liberation of highly reactive primary amines, which subsequently activates the built-in triggers with the release of more primary amines in a positive feedback manner, thereby triggering the degradation of micellar nanoparticles in a cycle amplification model. The generality and versatility of the cycle amplification concept have been successfully verified using three different triggers including reductive milieu, light irradiation, and esterase. We demonstrate that these stimuli-responsive nanoparticles show self-propagating degradation performance even in the presence of trace amounts of external stimuli. Moreover, we confirm that the esterase-responsive nanoparticles can discriminate cancer cells from normal ones by amplifying the esterase stimulus that is overexpressed in cancer cells, thereby enabling the selective release of encapsulated payloads and killing cancer cells. This work presents a robust strategy to fabricate stimuli-responsive nanocarriers with highly sensitive property toward external stimuli, showing promising applications in cancer therapy with minimized side effects.
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Affiliation(s)
- Jiajia Tan
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Zhengyu Deng
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Chengzhou Song
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jie Xu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yuben Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yong Yu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jinming Hu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Shiyong Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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16
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He Y, Wu Y, Zhang M, Zhang Y, Ding H, Zhang K. Controlled Ring-Opening Polymerization of Macrocyclic Monomers Based on the Quinone Methide Elimination Cascade Reaction. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00872] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yuxiang He
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ying Wu
- Institute of Polymer Chemistry and Physics, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Minghui Zhang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- Institute of Polymer Chemistry and Physics, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yuanxing Zhang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hao Ding
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ke Zhang
- Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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17
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Martinez MR, Dadashi-Silab S, Lorandi F, Zhao Y, Matyjaszewski K. Depolymerization of P(PDMS 11MA) Bottlebrushes via Atom Transfer Radical Polymerization with Activator Regeneration. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00415] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Michael R. Martinez
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Sajjad Dadashi-Silab
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Francesca Lorandi
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Yuqi Zhao
- Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Krzysztof Matyjaszewski
- Department of Chemistry, Center for Macromolecular Engineering, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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18
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Tan J, Hu J, Liu S. Designing self-propagating polymers with ultrasensitivity through feedback signal amplification. Polym Chem 2021. [DOI: 10.1039/d1py01095f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Stimuli-responsive polymers with self-propagating degradation capacity being sensitive to acids, bases, fluoride ions, and hydrogen peroxide are reviewed, exhibiting self-accelerated degradation behavior.
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Affiliation(s)
- Jiajia Tan
- Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jinming Hu
- Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Shiyong Liu
- Department of Polymer Science and Engineering, Hefei National Laboratory for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui 230026, China
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19
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20
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Addy PS, Shivrayan M, Cencer M, Zhuang J, Moore JS, Thayumanavan S. Polymer with Competing Depolymerization Pathways: Chain Unzipping versus Chain Scission. ACS Macro Lett 2020; 9:855-859. [PMID: 35648518 DOI: 10.1021/acsmacrolett.0c00250] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interest in triggered depolymerization is growing, driven by needs in sustainable plastics, self-healing materials, controlled release, and sensory amplification. For many triggered depolymerization reactions, the rate-limiting step does not directly involve the stimulus, and therefore, depolymerization kinetics exhibit only weak or no correlation to the concentration and reactivity of the stimulus. However, for many applications, a direct relationship between the stimulus and the depolymerization kinetics is desired. Here we designed, synthesized, and studied a polymer in which a nucleophile-induced chain scission (NICS) mechanism competes with the chain unzipping pathway. We find that the choice of the chain end functionality and the character of the nucleophile determines which of these is the predominant pathway. The NICS pathway was found to be dependent on the stimulus concentration, in contrast to the chain unzipping mechanism. We demonstrate transferability of these molecular-scale, structure-property relationships to nanoscale materials by formulating the polymers into host nanoparticles.
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21
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Kim H, Brooks AD, DiLauro AM, Phillips ST. Poly(carboxypyrrole)s That Depolymerize from Head to Tail in the Solid State in Response to Specific Applied Signals. J Am Chem Soc 2020; 142:9447-9452. [PMID: 32330033 DOI: 10.1021/jacs.0c02774] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This Article describes the design, synthesis, and analysis of a new class of polymer that is capable of depolymerizing continuously, completely, and cleanly from head to tail when a detection unit on the head of the polymer is exposed to a specific applied signal. The backbone of this polymer consists of 1,3-disubstituted pyrroles and carboxy linkages similar to polyurethanes. Diverse side chains or reactive end-groups can be introduced readily, which provides modular design of polymer structure. The designed depolymerization mechanism proceeds through spontaneous release of carbon dioxide and azafulvene in response to a single triggering reaction with the detection unit. These poly(carboxypyrrole)s depolymerize readily in nonpolar environments, and even in the bulk as solid-state plastics.
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Affiliation(s)
- Hyungwoo Kim
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea
| | - Adam D Brooks
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
| | - Anthony M DiLauro
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
| | - Scott T Phillips
- Micron School of Materials Science and Engineering, Boise State University, 1910 University Drive, Boise, Idaho 83725-2090, United States
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22
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Blake TR, Ho WC, Turlington CR, Zang X, Huttner MA, Wender PA, Waymouth RM. Synthesis and mechanistic investigations of pH-responsive cationic poly(aminoester)s. Chem Sci 2020; 11:2951-2966. [PMID: 34122796 PMCID: PMC8157522 DOI: 10.1039/c9sc05267d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 02/04/2020] [Indexed: 01/24/2023] Open
Abstract
The synthesis and degradation mechanisms of a class of pH-sensitive, rapidly degrading cationic poly(α-aminoester)s are described. These reactive, cationic polymers are stable at low pH in water, but undergo a fast and selective degradation at higher pH to liberate neutral diketopiperazines. Related materials incorporating oligo(α-amino ester)s have been shown to be effective gene delivery agents, as the charge-altering degradative behavior facilitates the delivery and release of mRNA and other nucleic acids in vitro and in vivo. Herein, we report detailed studies of the structural and environmental factors that lead to these rapid and selective degradation processes in aqueous buffers. At neutral pH, poly(α-aminoester)s derived from N-hydroxyethylglycine degrade selectively by a mechanism involving sequential 1,5- and 1,6-O→N acyl shifts to generate bis(N-hydroxyethyl) diketopiperazine. A family of structurally related cationic poly(aminoester)s was generated to study the structural influences on the degradation mechanism, product distribution, and pH dependence of the rate of degradation. The kinetics and mechanism of the pH-induced degradations were investigated by 1H NMR, model reactions, and kinetic simulations. These results indicate that polyesters bearing α-ammonium groups and appropriately positioned N-hydroxyethyl substituents are readily cleaved (by intramolecular attack) or hydrolyzed, representing dynamic "dual function" materials that are initially polycationic and transform with changing environment to neutral products.
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Affiliation(s)
- Timothy R Blake
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | - Wilson C Ho
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | | | - Xiaoyu Zang
- Department of Chemistry, Stanford University Stanford CA 94305 USA
| | | | - Paul A Wender
- Department of Chemistry, Stanford University Stanford CA 94305 USA
- Department of Chemical and Systems Biology, Stanford University Stanford CA 94305 USA
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23
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Affiliation(s)
- Elizabeth R. Gillies
- Department of Chemistry, Department of Chemical and Biochemical Engineering, Centre for Advanced Materials and Biomaterials Research, TheUniversity of Western Ontario London, ON Canada N6A 5B7
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24
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Abstract
Biomedical use cases for self-immolative polymers.
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Affiliation(s)
- Yue Xiao
- College of Chemistry
- Green Catalysis Center
- Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications
- Zhengzhou University
- Zhengzhou 450001
| | - Xuyu Tan
- Department of Chemistry and Chemical Biology
- Northeastern University
- Boston
- USA
| | - Zhaohui Li
- College of Chemistry
- Green Catalysis Center
- Henan Joint International Research Laboratory of Green Construction of Functional Molecules and Their Bioanalytical Applications
- Zhengzhou University
- Zhengzhou 450001
| | - Ke Zhang
- Department of Chemistry and Chemical Biology
- Northeastern University
- Boston
- USA
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25
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Deng Z, Hu J, Liu S. Disulfide-Based Self-Immolative Linkers and Functional Bioconjugates for Biological Applications. Macromol Rapid Commun 2019; 41:e1900531. [PMID: 31755619 DOI: 10.1002/marc.201900531] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 11/05/2019] [Indexed: 12/12/2022]
Abstract
It is of vital importance to reversibly mask and selectively activate bioactive agents for advanced therapeutic and diagnostic purposes, aiming to efficiently suppress background interferences and attenuate systemic toxicity. This strategy has been involved in diverse applications spanning from chemical/biological sensors and diagnostics to drug delivery nanocarriers. Among these, redox-responsive disulfide linkages have been extensively utilized by taking advantage of extracellular and intracellular glutathione (GSH) gradients. However, direct conjugation of cleavable triggers to bioactive agents through disulfide bonds suffers from bulky steric hindrance and limited choice of trigger-drug combinations. Fortunately, the emergence of disulfide self-immolative linkers (DSILs) provides a general and robust strategy to not only mask various bioactive agents through the formation of dynamic disulfide linkages but also make it possible to be selectively activated upon disulfide cleavage in the reductive cytoplasmic milieu. In this review, recent developments in DSILs are focused with special attention on emerging chemical design strategies and functional applications in the biomedical field.
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Affiliation(s)
- Zhengyu Deng
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China
| | - Jinming Hu
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China
| | - Shiyong Liu
- CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China
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26
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Gnaim S, Shabat D. Activity-Based Optical Sensing Enabled by Self-Immolative Scaffolds: Monitoring of Release Events by Fluorescence or Chemiluminescence Output. Acc Chem Res 2019; 52:2806-2817. [PMID: 31483607 DOI: 10.1021/acs.accounts.9b00338] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Functional molecular scaffolds comprised of self-immolative adaptors are being used in widespread applications in the fields of enzyme activity analyses, signal amplification, and bioimaging. Optically detected chemical probes are very promising compounds for sensing and diagnosis, since they present several attractive features such as high specificity, low detection limits, fast response times, and technical simplicity. During the last two decades, we have developed several distinct molecular scaffolds that harness the self-immolative disassembly feature of these adaptors to amplify chromogenic output for diagnosis and drug delivery applications. In order to study the molecular behavior of the various amplification systems, an optical output, used to monitor the progress of the disassembly pattern, was required. Therefore, over the course of our research, diverse molecular scaffolds that produce an optical signal in response to a disassembly step, were evaluated. These optically active scaffolds have been incorporated into self-immolative dendrimers and self-immolative polymers to implement unique disassembly properties that result with linear and exponential signal amplification capabilities. In addition, some scaffolds, aimed for linker technology, were used in delivery systems to monitor release of drug molecules. The optical signal used to monitor the release event could be produced by analysis of reporter molecules with chromogenic or fluorogenic properties. Recently, we have also developed molecular scaffolds modified to produce a chemiluminescent signal to monitor the self-immolative disassembly step. The main advantage of these scaffolds over others is the use of chemiluminescence as an output signal. It is well-known that chemiluminescence is considered as one the most sensitive diagnostic methods due to its high signal-to-noise ratio. The unique structures of the self-immolative chemiluminescence scaffolds have been used in the design of three different distinctive concepts: self-immolative chemiluminescence polymers, auto-inductive amplification systems with chemiluminescence signal and monitoring of drug release by a chemiluminescence output. Furthermore, we reported the design and synthesis of the first theranostic prodrug for the monitoring of drug release achieved by a chemiluminescence mode of action. Quinone-methide elimination has proven to serve as a valuable functional tool for composing molecular scaffolds with self-immolative capabilities. Such scaffolds function as molecular adaptors that can almost simultaneously release a target molecule with an accompanied emission of a light signal that is used to monitor the release event. We anticipate that these self-immolative scaffolds will continue to find utility as functional linkers in various chemical and biological research areas such as drug delivery, theranostic applications, and as molecular sensors with signal amplification.
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Affiliation(s)
- Samer Gnaim
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978 Israel
| | - Doron Shabat
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978 Israel
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27
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Joo W, Wang W, Mesch R, Matsuzawa K, Liu D, Willson CG. Synthesis of Unzipping Polyester and a Study of its Photochemistry. J Am Chem Soc 2019; 141:14736-14741. [PMID: 31460760 DOI: 10.1021/jacs.9b06285] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Preparation of an unzipping polyester is reported. The monomer was prepared from benzoic acid in a four-step sequence. Step growth polymerization of the monomer provides the target polymer. Efficient depolymerization upon irradiation at 254 nm was confirmed with a quantum yield of >0.8. The photolysis mechanism was investigated, and the results of radical trapping experiments are consistent with an initial Norrish type I like homolysis followed by a radical mediated depropagation reaction driven by aromatization.
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Affiliation(s)
- Wontae Joo
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Wade Wang
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Ryan Mesch
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Kensuke Matsuzawa
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Di Liu
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States
| | - C Grant Willson
- Department of Chemistry , University of Texas at Austin , Austin , Texas 78712 , United States.,Department of Chemical Engineering , University of Texas at Austin , Austin , Texas 78712 , United States
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28
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Neary WJ, Isais TA, Kennemur JG. Depolymerization of Bottlebrush Polypentenamers and Their Macromolecular Metamorphosis. J Am Chem Soc 2019; 141:14220-14229. [PMID: 31403783 DOI: 10.1021/jacs.9b05560] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The depolymerization of bottlebrush (BB) polymers with varying lengths of polycyclopentene (PCP) backbone and polystyrene (PS) grafts is investigated. In all cases, ring closing metathesis (RCM) depolymerization of the PCP BB backbone appears to occur through an end-to-end depolymerization mechanism as evidenced by size exclusion chromatography. Investigation on the RCM depolymerization of linear PCP reveals a more random chain degradation process. Quantitative depolymerization occurs under thermodynamic conditions (higher temperature and dilution) that drives RCM into cyclopentenes (CPs), each bearing one of the original PS grafts from the BB. Catalyst screening reveals Grubbs' third (G3) and second (G2) generation catalyst depolymerize BBs significantly faster than Grubbs' first generation (G1) and Hoveyda-Grubbs' second generation (HG2) catalyst under identical conditions while solvent (toluene versus CHCl3) plays a less significant role. The length of the BB backbone and PS side chains also play a minor role in depolymerization kinetics, which is discussed. The ability to completely deconstruct these BB architectures into linear grafts provides definitive insights toward the ATRP "grafting-from" mechanism originally used to construct the BBs. Core-shell BB block copolymers (BBCPs) are shown to quantitatively depolymerize into linear diblock polymer grafts. Finally, the complete depolymerization of BBs into α-cyclopentenyl-PS allows further transformation to other architectures, such as 3-arm stars, through thiol-ene coupling onto the CP end group. These unique materials open the door to stimuli-responsive reassembly of BBs and BBCPs into new morphologies driven by macromolecular metamorphosis.
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Affiliation(s)
- William J Neary
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
| | - Taylor A Isais
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
| | - Justin G Kennemur
- Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States
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29
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Yardley RE, Kenaree AR, Gillies ER. Triggering Depolymerization: Progress and Opportunities for Self-Immolative Polymers. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00965] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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30
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Dong P, Rakesh K, Manukumar H, Mohammed YHE, Karthik C, Sumathi S, Mallu P, Qin HL. Innovative nano-carriers in anticancer drug delivery-a comprehensive review. Bioorg Chem 2019; 85:325-336. [DOI: 10.1016/j.bioorg.2019.01.019] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 02/07/2023]
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31
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Heuchan SM, MacDonald JP, Bauman LA, Fan B, Henry HAL, Gillies ER. Photoinduced Degradation of Polymer Films Using Polyglyoxylate-Polyester Blends and Copolymers. ACS OMEGA 2018; 3:18603-18612. [PMID: 31458428 PMCID: PMC6643861 DOI: 10.1021/acsomega.8b02826] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 12/07/2018] [Indexed: 06/10/2023]
Abstract
Polymeric coatings are commonly employed to alter surface properties. While some coatings are designed to remain stable over a prolonged period, in applications such as pharmaceuticals or fertilizers, the coating is designed to erode and reveal or release the underlying material. Self-immolative polymers (SIPs) undergo depolymerization following the cleavage of stimuli-responsive end-caps from their termini, enabling controlled depolymerization in the solid state and in solution. Poly(ethyl glyoxylate) (PEtG) is a promising SIP because of its depolymerization to benign products, but its amorphous structure and low glass-transition temperature make it unsuitable alone for coating applications. This study explored the blending of PEtG with polyesters including polycaprolactone (PCL), poly(l-lactic acid), and poly(R-3-hydroxybutyrate). Block copolymers of PEtG with PCL were also synthesized and studied. It was found that the phase separation behavior and consequently the thermal and mechanical properties of the materials could be tuned according to the composition of the blend, while the stimuli-responsive degradation of PEtG was retained in the blends. This work therefore provides a framework for the application of PEtG-based coatings in applications ranging from pharmaceuticals to agricultural products.
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Affiliation(s)
- Spencer M. Heuchan
- Department
of Biology and Department of Chemistry and the Centre for Advanced Materials and
Biomaterials Research, The University of
Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Jarret P. MacDonald
- Department
of Biology and Department of Chemistry and the Centre for Advanced Materials and
Biomaterials Research, The University of
Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Lukas A. Bauman
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
| | - Bo Fan
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
| | - Hugh A. L. Henry
- Department
of Biology and Department of Chemistry and the Centre for Advanced Materials and
Biomaterials Research, The University of
Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
| | - Elizabeth R. Gillies
- Department
of Biology and Department of Chemistry and the Centre for Advanced Materials and
Biomaterials Research, The University of
Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
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32
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Jung D, Lee KM, Chang JY, Yun M, Choi HJ, Kim YA, Yoon H, Kim H. Selective De-Cross-Linking of Transformable, Double-Network Hydrogels: Preparation, Structural Conversion, and Controlled Release. ACS APPLIED MATERIALS & INTERFACES 2018; 10:42985-42991. [PMID: 30431252 DOI: 10.1021/acsami.8b14528] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This study has demonstrated the design of stimuli-responsive double-network hydrogels that are formed by sequential polymerization and show chemical transformation by selective de-cross-linking without structural failure owing to chemical orthogonality. Each self-immolative and thermoresponsive network established together the double-network structure through a thiol-ene click reaction and radical polymerization. The hydrogel exhibited enhanced mechanical strength but chemically transformed through the selective de-cross-linking of specific network triggered by a molecular stimulus, which significantly alters physical properties of the material such as tunable toughness and lower critical solution temperature behavior. In addition, the material displayed a thermoresponsive, controlled release. Only after treatment with the stimulus did the hydrogel release cargo molecules on demand via de-cross-linking while maintaining the entire structure.
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Affiliation(s)
- Doyoung Jung
- Alan G. MacDiarmid Energy Research Institute, School of Polymer Science and Engineering , Chonnam National University , 77 Yongbong-ro , Buk-gu, Gwangju 61186 , Korea
| | - Kyoung Min Lee
- Alan G. MacDiarmid Energy Research Institute, School of Polymer Science and Engineering , Chonnam National University , 77 Yongbong-ro , Buk-gu, Gwangju 61186 , Korea
- Department of Materials Science and Engineering , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Korea
| | - Ji Young Chang
- Department of Materials Science and Engineering , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Korea
| | - Misun Yun
- Microbiology and Functionality Research Group , World Institute of Kimchi , 86 Kimchi-ro , Gwangju 61755 , Korea
| | - Hak-Jong Choi
- Microbiology and Functionality Research Group , World Institute of Kimchi , 86 Kimchi-ro , Gwangju 61755 , Korea
| | - Yoong Ahm Kim
- Alan G. MacDiarmid Energy Research Institute, School of Polymer Science and Engineering , Chonnam National University , 77 Yongbong-ro , Buk-gu, Gwangju 61186 , Korea
| | - Hyeonseok Yoon
- Alan G. MacDiarmid Energy Research Institute, School of Polymer Science and Engineering , Chonnam National University , 77 Yongbong-ro , Buk-gu, Gwangju 61186 , Korea
| | - Hyungwoo Kim
- Alan G. MacDiarmid Energy Research Institute, School of Polymer Science and Engineering , Chonnam National University , 77 Yongbong-ro , Buk-gu, Gwangju 61186 , Korea
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33
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Binder WH. The Past 40 Years of Macromolecular Sciences: Reflections on Challenges in Synthetic Polymer and Material Science. Macromol Rapid Commun 2018; 40:e1800610. [DOI: 10.1002/marc.201800610] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 09/18/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Wolfgang H. Binder
- Institute of Chemistry; Faculty of Natural Sciences II; Martin-Luther University Halle-Wittenberg; von Danckelmann-Platz 4 D-06120 Halle (Saale) Germany
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34
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Phillips O, Engler A, Schwartz JM, Jiang J, Tobin C, Guta YA, Kohl PA. Sunlight photodepolymerization of transient polymers. J Appl Polym Sci 2018. [DOI: 10.1002/app.47141] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- O. Phillips
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - A. Engler
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - J. M. Schwartz
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - J. Jiang
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - C. Tobin
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - Y. A. Guta
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
| | - P. A. Kohl
- School of Chemical and Biomolecular EngineeringGeorgia Institute of Technology Atlanta Georgia 30332‐0100
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35
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Yan J, Lee S, Zhang A, Yoon J. Self-immolative colorimetric, fluorescent and chemiluminescent chemosensors. Chem Soc Rev 2018; 47:6900-6916. [PMID: 30175338 DOI: 10.1039/c7cs00841d] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Self-immolative chemistry features a cascade of disassembly reactions in response to external stimuli, which provides great opportunities to design new self-immolative chemosensors with advanced performance and/or functions. Self-immolative spacers in these chemosensors not only facilitate the linkage of designed triggers to various chromophores or fluorophores, but can also be used to solve inherent problems associated with native chemosensors, such as low reactivities, poor stabilities and slow response times. Their capacity for stimuli-responsive release through operation of a self-immolative reaction further enables integration of sophisticated functions into chemosensors, including signal amplification, enzyme activity localization, and drug monitoring. Significant advances have been made in the field of self-immolative chemosensors, leading to intriguing applications to sensitive detection of analytes, bioimaging and cancer theranostics. This tutorial review summarizes this recent progress with a focus on their design strategies and sensing mechanisms.
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Affiliation(s)
- Jiatao Yan
- Department of Polymer Materials, College of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
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36
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Tang J, Chen EY. Effects of Chain Ends on Thermal and Mechanical Properties and Recyclability of Poly(
γ
‐butyrolactone). ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29180] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jing Tang
- Department of Chemistry Colorado State University Fort Collins, Colorado 80523‐1872
| | - Eugene Y.‐X. Chen
- Department of Chemistry Colorado State University Fort Collins, Colorado 80523‐1872
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37
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Yardley RE, Gillies ER. Multi-stimuli-responsive self-immolative polymer assemblies. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Rebecca E. Yardley
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research; The University of Western Ontario, 1151 Richmond Street; London Ontario Canada N6A 5B7
| | - Elizabeth R. Gillies
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research; The University of Western Ontario, 1151 Richmond Street; London Ontario Canada N6A 5B7
- Department of Chemical Engineering; The University of Western Ontario, 1151 Richmond Street; London Ontario Canada N6A 5B9
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38
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Gambles M, Fan B, Borecki A, Gillies ER. Hybrid Polyester Self-Immolative Polymer Nanoparticles for Controlled Drug Release. ACS OMEGA 2018; 3:5002-5011. [PMID: 31458713 PMCID: PMC6641706 DOI: 10.1021/acsomega.8b00534] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Delivery systems have been developed to address problematic properties of drugs, but the specific release of drugs at their targets is still a challenge. Polymers that depolymerize end-to-end in response to the cleavage of stimuli-responsive end-caps from their termini, commonly referred to as self-immolative polymers, offer high sensitivity to stimuli and have potential for the development of new high-performance delivery systems. In this work, we prepared hybrid particles composed of varying ratios of self-immolative poly(ethyl glyoxylate) (PEtG) and slowly degrading poly(d,l-lactic acid) (PLA). These systems were designed to provide a dual release mechanism consisting of a rapid burst release of drug from the PEtG domains and a slower release from the PLA domains. Using end-caps responsive to UV light and reducing thiols, it was found that triggered particles exhibited partial degradation, as indicated by a reduction in their dynamic light-scattering count rate that depended on the PEtG:PLA ratio. The particles were also shown to release the hydrophobic dye Nile red and the drug celecoxib in a manner that depended on triggering and the PEtG:PLA ratio. In vitro toxicity assays showed an effect of the stimuli on the toxicity of the celecoxib-loaded particles but also suggested it would be ideal to replace the sodium cholate surfactant that was used in the particle synthesis procedure in order to reduce the background toxicity of the delivery system. Overall, these hybrid systems show promise for tuning and controlling the release of drugs in response to stimuli.
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Affiliation(s)
- Michael
T. Gambles
- Department
of Chemistry and the Centre for Advanced Materials and Biomaterials
Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3B7, Canada
| | - Bo Fan
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
| | - Aneta Borecki
- Department
of Chemistry and the Centre for Advanced Materials and Biomaterials
Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3B7, Canada
| | - Elizabeth R. Gillies
- Department
of Chemistry and the Centre for Advanced Materials and Biomaterials
Research, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 3B7, Canada
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
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39
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Lopez Hernandez H, Lee OP, Possanza Casey CM, Kaitz JA, Park CW, Plantz CL, Moore JS, White SR. Accelerated Thermal Depolymerization of Cyclic Polyphthalaldehyde with a Polymeric Thermoacid Generator. Macromol Rapid Commun 2018; 39:e1800046. [PMID: 29709094 DOI: 10.1002/marc.201800046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/08/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Hector Lopez Hernandez
- Department of Mechanical Science and Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Olivia P. Lee
- Department of Chemistry Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Catherine M. Possanza Casey
- Department of Chemistry Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Joshua A. Kaitz
- Department of Chemistry Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Chan Woo Park
- Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Christopher L. Plantz
- Department of Materials Science and Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Jeffrey S. Moore
- Department of Chemistry Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
| | - Scott R. White
- Department of Aerospace Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana‐Champaign Urbana IL 61801 USA
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40
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Fan B, Salazar R, Gillies ER. Depolymerization of Trityl End-Capped Poly(Ethyl Glyoxylate): Potential Applications in Smart Packaging. Macromol Rapid Commun 2018; 39:e1800173. [PMID: 29700924 DOI: 10.1002/marc.201800173] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 03/26/2018] [Indexed: 12/28/2022]
Abstract
The temperature-dependent depolymerization of self-immolative poly(ethyl glyoxylate) (PEtG) capped with triphenylmethyl (trityl) groups is studied and its potential application for smart packaging is explored. PEtGs with four different trityl end-caps are prepared and found to undergo depolymerization to volatile products from the solid state at different rates depending on temperature and the electron-donating substituents on the trityl aromatic rings. Through the incorporation of hydrophobic dyes including Nile red and IR-780, the depolymerization is visualized as a color change of the dye as it changes from a dispersed to aggregated state. The ability of this platform to provide information on thermal history through an easily readable signal makes it promising in smart packaging applications for sensitive products such a food and other cargo that is susceptible to degradation.
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Affiliation(s)
- Bo Fan
- Department of Chemical and Biochemical Engineering and the Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 5B9, Canada
| | - Rómulo Salazar
- Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ingeniería en Mecánica y Ciencias de la Producción, Carrera de Ingeniería en Alimentos, Campus Gustavo Galindo Km 30.5 Vía Perimetral, ECO90902 PO Box 09-01-5863, Guayaquil, Ecuador
| | - Elizabeth R Gillies
- Department of Chemical and Biochemical Engineering and the Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 5B9, Canada.,Department of Chemistry, The University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 5B7, Canada
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41
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Abstract
Incorporating labile bonds inside polymer backbone and side chains yields interesting polymer materials that are responsive to change of environmental stimuli. Drugs can be conjugated to various polymers through different conjugation linkages and spacers. One of the key factors influencing the release profile of conjugated drugs is the hydrolytic stability of the conjugated linkage. Generally, the hydrolysis of acid-labile linkages, including acetal, imine, hydrazone, and to some extent β-thiopropionate, are relatively fast and the conjugated drug can be completely released in the range of several hours to a few days. The cleavage of ester linkages are usually slow, which is beneficial for continuous and prolonged release. Another key structural factor is the water solubility of polymer-drug conjugates. Generally, the release rate from highly water-soluble prodrugs is fast. In prodrugs with large hydrophobic segments, the hydrophobic drugs are usually located in the hydrophobic core of micelles and nanoparticles, which limits the access to the water, hence lowering significantly the hydrolysis rate. Finally, self-immolative polymers are also an intriguing new class of materials. New synthetic pathways are needed to overcome the fact that much of the small molecules produced upon degradation are not active molecules useful for biomedical applications.
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Affiliation(s)
- Farzad Seidi
- Department of Materials Science and Engineering, School of Molecular Science and Engineering , Vidyasirimedhi Institute of Science and Technology , Rayong 21210 , Thailand
| | - Ratchapol Jenjob
- Department of Materials Science and Engineering, School of Molecular Science and Engineering , Vidyasirimedhi Institute of Science and Technology , Rayong 21210 , Thailand
| | - Daniel Crespy
- Department of Materials Science and Engineering, School of Molecular Science and Engineering , Vidyasirimedhi Institute of Science and Technology , Rayong 21210 , Thailand
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42
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Lin ZT, DeMarr V, Bao J, Wu T. Molecularly Imprinted Polymer-Based Biosensors: For the Early, Rapid Detection of Pathogens, Biomarkers, and Toxins in Clinical, Environmental, or Food Samples. IEEE NANOTECHNOLOGY MAGAZINE 2018. [DOI: 10.1109/mnano.2017.2779718] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zuan-Tao Lin
- Biomedical Engineering, University of Houston, Houston, Texas United States
| | - Victoria DeMarr
- Biomedical Engineering, University of Houston, Houston, Texas United States
| | - Jiming Bao
- Electrical and Computer Engineering, University of Houston, Houston, Texas United States
| | - Tianfu Wu
- Biomedical Engineering, University of Houston, Houston, Texas United States
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43
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Wu Y, Zhang L, Zhang M, Liu Z, Zhu W, Zhang K. Bottlebrush polymers with self-immolative side chains. Polym Chem 2018. [DOI: 10.1039/c8py00182k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bottlebrush polymers with self-immolative polymer side chains were prepared, which can precisely disassemble to release molecular cargos under UV-irradiation.
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Affiliation(s)
- Ying Wu
- Institute of Polymer Chemistry and Physics
- Beijing Key Laboratory of Energy Conversion and Storage Materials
- College of Chemistry
- Beijing Normal University
- Beijing
| | - Liangcai Zhang
- Institute of Polymer Chemistry and Physics
- Beijing Key Laboratory of Energy Conversion and Storage Materials
- College of Chemistry
- Beijing Normal University
- Beijing
| | - Minghui Zhang
- Institute of Polymer Chemistry and Physics
- Beijing Key Laboratory of Energy Conversion and Storage Materials
- College of Chemistry
- Beijing Normal University
- Beijing
| | - Zhengping Liu
- Institute of Polymer Chemistry and Physics
- Beijing Key Laboratory of Energy Conversion and Storage Materials
- College of Chemistry
- Beijing Normal University
- Beijing
| | - Wen Zhu
- State Key Laboratory of Polymer Physics and Chemistry
- Institute of Chemistry
- The Chinese Academy of Sciences
- Beijing 100190
- China
| | - Ke Zhang
- State Key Laboratory of Polymer Physics and Chemistry
- Institute of Chemistry
- The Chinese Academy of Sciences
- Beijing 100190
- China
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44
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Ergene C, Palermo EF. Self-immolative polymers with potent and selective antibacterial activity by hydrophilic side chain grafting. J Mater Chem B 2018; 6:7217-7229. [DOI: 10.1039/c8tb01632a] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Self-immolative polymers, which exert potent antibacterial activity with low hemolytic toxicity to red blood cells, are triggered to unzip into small molecules by a chemical stimulus.
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Affiliation(s)
- Cansu Ergene
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Edmund F. Palermo
- Department of Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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45
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Fan B, Yardley RE, Trant JF, Borecki A, Gillies ER. Tuning the hydrophobic cores of self-immolative polyglyoxylate assemblies. Polym Chem 2018. [DOI: 10.1039/c8py00350e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amphiphilic block copolymers containing different self-immolative polyglyoxylates were synthesized and self-assembled to provide drug carriers with variable celecoxib loading capacities and release rates, as well as different in vitro toxicities.
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Affiliation(s)
- Bo Fan
- Department of Chemical and Biochemical Engineering and the Centre for Advanced Materials and Biomaterials Research
- The University of Western Ontario
- London
- Canada
| | | | - John F. Trant
- Department of Chemistry
- The University of Western Ontario
- London
- Canada
| | - Aneta Borecki
- Department of Chemistry
- The University of Western Ontario
- London
- Canada
| | - Elizabeth R. Gillies
- Department of Chemical and Biochemical Engineering and the Centre for Advanced Materials and Biomaterials Research
- The University of Western Ontario
- London
- Canada
- Department of Chemistry
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46
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Ergene C, Yasuhara K, Palermo EF. Biomimetic antimicrobial polymers: recent advances in molecular design. Polym Chem 2018. [DOI: 10.1039/c8py00012c] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The increasing prevalence of antibiotic-resistant bacterial infections, coupled with the decline in the number of new antibiotic drug approvals, has created a therapeutic gap that portends an emergent public health crisis.
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Affiliation(s)
- Cansu Ergene
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Kazuma Yasuhara
- Graduate School of Materials Science
- Nara Institute for Science and Technology
- Ikoma
- Japan
| | - Edmund F. Palermo
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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47
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Wang F, Diesendruck CE. Polyphthalaldehyde: Synthesis, Derivatives, and Applications. Macromol Rapid Commun 2017; 39. [DOI: 10.1002/marc.201700519] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 09/11/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Feng Wang
- Schulich Faculty of Chemistry and Russell-Berrie Nanotechnology Institute; Technion - Israel Institute of Technology; Haifa 32000 Israel
| | - Charles E. Diesendruck
- Schulich Faculty of Chemistry and Russell-Berrie Nanotechnology Institute; Technion - Israel Institute of Technology; Haifa 32000 Israel
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48
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Ergene C, Palermo EF. Cationic Poly(benzyl ether)s as Self-Immolative Antimicrobial Polymers. Biomacromolecules 2017; 18:3400-3409. [PMID: 28880551 DOI: 10.1021/acs.biomac.7b01062] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Self-immolative polymers (SIMPs) are macromolecules that spontaneously undergo depolymerization into small molecules when triggered by specific external stimuli. We report here the first examples of antimicrobial SIMPs with potent, rapid, and broad-spectrum bactericidal activity. Their antibacterial and hemolytic activities were examined as a function of cationic functionality. Polymers bearing primary ammonium cationic groups showed more potent bactericidal activity against Escherichia coli, relative to tertiary and quaternary ammonium counterparts, whereas the quaternary ammonium polymers showed the lowest hemolytic toxicity. These antibacterial polycations undergo end-to-end depolymerization when triggered by an externally applied stimulus. Specifically, poly(benzyl ether)s end-capped with a silyl ether group and bearing pendant allyl side chains were converted to polycations by photoinitiated thiol-ene radical addition using cysteamine HCl. The intact polycations are stable in solution, but they spontaneously unzip into their component monomers upon exposure to fluoride ions, with excellent sensitivity and selectivity. Upon triggered depolymerization, the antibacterial potency was largely retained but the hemolytic toxicity was substantially reduced. Thus, we reveal the first example of a self-immolative antibacterial polymer platform that will enable antibacterial materials to spontaneously unzip into biologically active small molecules upon the introduction of a specifically designed stimulus.
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Affiliation(s)
- Cansu Ergene
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute , 110 8th St., Troy, New York 12180, United States
| | - Edmund F Palermo
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute , 110 8th St., Troy, New York 12180, United States
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49
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Lin ZT, Gu J, Li CH, Lee TR, Xie L, Chen S, Cao PY, Jiang S, Yuan Y, Hong X, Wang H, Wang D, Wang X, Jiang GB, Heon M, Wu T. A Nanoparticle-Decorated Biomolecule-Responsive Polymer Enables Robust Signaling Cascade for Biosensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1702090. [PMID: 28612952 DOI: 10.1002/adma.201702090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 05/05/2017] [Indexed: 06/07/2023]
Abstract
To meet the increasing demands for ultrasensitivity in monitoring trace amounts of low-abundance early biomarkers or environmental toxins, the development of a robust sensing system is urgently needed. Here, a novel signal cascade strategy is reported via an ultrasensitive polymeric sensing system (UPSS) composed of gold nanoparticle (gNP)-decorated polymer, which enables gNP aggregation in polymeric network and electrical conductance change upon specific aptamer-based biomolecular recognition. Ultralow concentrations of thrombin (10-18 m) as well as a low molecular weight anatoxin (165 Da, 10-14 m) are detected selectively and reproducibly. The biomolecular recognition induced polymeric network shrinkage responses as well as dose-dependent responses of the UPSS are validated using in situ real-time atomic-force microscopy, representing the first instance of real-time detection of biomolecular binding-induced polymer shrinkage in soft matter. Furthermore, in situ real-time confocal laser scanning microscopy imaging reveals the dynamic process of gNP aggregation responses upon biomolecular binding.
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Affiliation(s)
- Zuan-Tao Lin
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Jianhua Gu
- Electron Microscopy Core, Houston Methodist Research Institute, Houston, TX, 77030, USA
| | - Chien-Hung Li
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | - T Randall Lee
- Department of Chemistry, University of Houston, Houston, TX, 77204, USA
| | - Lixin Xie
- Department of Physics and TcSUH, University of Houston, Houston, TX, 77204, USA
| | - Shuo Chen
- Department of Physics and TcSUH, University of Houston, Houston, TX, 77204, USA
| | - Piao-Yang Cao
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Shan Jiang
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Yulin Yuan
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Xia Hong
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Hongting Wang
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Dezhi Wang
- Department of Physics and TcSUH, University of Houston, Houston, TX, 77204, USA
| | - Xifan Wang
- Department of Materials Science and NanoEngineering, Rice University, TX, 77005, USA
| | - Gang-Biao Jiang
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
- College of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Mikala Heon
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
| | - Tianfu Wu
- Department of Biomedical Engineering, University of Houston, Houston, TX, 77204, USA
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50
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Fan B, Gillies ER. Poly(ethyl glyoxylate)-Poly(ethylene oxide) Nanoparticles: Stimuli-Responsive Drug Release via End-to-End Polyglyoxylate Depolymerization. Mol Pharm 2017; 14:2548-2559. [DOI: 10.1021/acs.molpharmaceut.7b00030] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Fan
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
| | - Elizabeth R. Gillies
- Department
of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B9, Canada
- Department
of Chemistry, The University of Western Ontario, 1151 Richmond
Street, London, Ontario Canada, N6A 5B7
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