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Kang Y, Liu K, Zhang X. Supra-amphiphiles: a new bridge between colloidal science and supramolecular chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5989-6001. [PMID: 24617560 DOI: 10.1021/la500327s] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In addition to conventional amphiphiles, an emerging research area is supra-amphiphiles, which are constructed on the basis of noncovalent interactions and dynamic covalent bonds. In this feature article, we have provided a general introduction to the concept, design principles, and topologies of supra-amphiphiles, starting from some rationally tailored building blocks. In addition, we highlight some progress in the functional assembly of supra-amphiphiles, such as responsive nanoscale carriers, antibacterial and antitumor agents, fluorescent-based chemical sensors, and enzyme mimics. The supra-amphiphile is a new bridge between colloidal science and supramolecular chemistry, and it is a field where we can make full use of our imaginative power.
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Affiliation(s)
- Yuetong Kang
- The Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University , Beijing 100084, PR China
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102
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Zhang J, Gao J, Chen M, Yang Z. Using phosphatases to generate self-assembled nanostructures and their applications. Antioxid Redox Signal 2014; 20:2179-90. [PMID: 24180369 DOI: 10.1089/ars.2013.5701] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SIGNIFICANCE Self-assembled nanostructures have received significant research interest in the last decade, because they show great promise for drug delivery, diagnostics, tissue engineering, and regenerative medicine. Recently, the development of enzyme-assisted self-assembled nanostructures has become an active area of research because of the attractive characteristics of enzymes, such as ready availability, good biocompatibility, and high selectivity and specificity. Phosphatases, taking part in approximately 30% of intra- and extracellular activities, have been widely employed as triggers for the generation of self-assembled biomaterials, including static, reversible, and dynamic systems. RECENT ADVANCES In this review, we highlight the generation of self-assembled systems of synthetic molecules using phosphatases and their potential applications. We first summarize the generation of different kinds of static and dynamic self-assembled structures, including nanofibers and nanoparticles, by the dephosphorylation reaction catalyzed by phosphatases. The antagonistic interactions of phosphatases and kinases make this system one of the most attractive candidates for biotransformation. Diverse biomedical applications of phosphatases/kinases-involved self-assembled systems have been extensively explored in fields such as bacterial growth inhibition, drug delivery, imaging of self-assembly inside live cells, and biomineralization. We then summarize the reversible self-assembled systems controlled by the pair enzymes of phosphatases/kinases, in which different morphologies of self-assembled nanostructures can be achieved and switched by the pair enzymes. These phosphatase-involved self-assembled systems can be used for many applications such as controlled drug delivery, enzyme activity imaging, and cancer cell inhibition. CRITICAL ISSUES Phosphatases are over-expressed in several cancer cell lines. Their detection is, therefore, important for cancer diagnostics. Nanomaterials that can respond to abnormal phosphatase activities also have big potential for the delivery of therapeutic agents on demand. The study of reversible self-assembling systems control by the phosphatase/kinase switch may provide useful insights to understand the working principle of this important biological switch. FUTURE DIRECTIONS The design principle mentioned in this review may stimulate the generation of smart self-assembled systems by other enzymes or other pairs of enzymes. The combination of environment-sensitive fluorescence property of fluorescent dyes and self-assembling molecules that can respond to enzymes may lead to the development of smart probes to monitor important biological processes.
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Affiliation(s)
- Jianwu Zhang
- 1 Department of Cardiology, Zhujiang Hospital of Southern Medical University , Guangzhou, People's Republic of China
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103
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Jhaveri AM, Torchilin VP. Multifunctional polymeric micelles for delivery of drugs and siRNA. Front Pharmacol 2014; 5:77. [PMID: 24795633 PMCID: PMC4007015 DOI: 10.3389/fphar.2014.00077] [Citation(s) in RCA: 257] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 03/31/2014] [Indexed: 12/18/2022] Open
Abstract
Polymeric micelles, self-assembling nano-constructs of amphiphilic copolymers with a core-shell structure have been used as versatile carriers for delivery of drugs as well as nucleic acids. They have gained immense popularity owing to a host of favorable properties including their capacity to effectively solubilize a variety of poorly soluble pharmaceutical agents, biocompatibility, longevity, high stability in vitro and in vivo and the ability to accumulate in pathological areas with compromised vasculature. Moreover, additional functions can be imparted to these micelles by engineering their surface with various ligands and cell-penetrating moieties to allow for specific targeting and intracellular accumulation, respectively, to load them with contrast agents to confer imaging capabilities, and incorporating stimuli-sensitive groups that allow drug release in response to small changes in the environment. Recently, there has been an increasing trend toward designing polymeric micelles which integrate a number of the above functions into a single carrier to give rise to “smart,” multifunctional polymeric micelles. Such multifunctional micelles can be envisaged as key to improving the efficacy of current treatments which have seen a steady increase not only in hydrophobic small molecules, but also in biologics including therapeutic genes, antibodies and small interfering RNA (siRNA). The purpose of this review is to highlight recent advances in the development of multifunctional polymeric micelles specifically for delivery of drugs and siRNA. In spite of the tremendous potential of siRNA, its translation into clinics has been a significant challenge because of physiological barriers to its effective delivery and the lack of safe, effective and clinically suitable vehicles. To that end, we also discuss the potential and suitability of multifunctional polymeric micelles, including lipid-based micelles, as promising vehicles for both siRNA and drugs.
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Affiliation(s)
- Aditi M Jhaveri
- Department of Pharmaceutical Sciences, Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University Boston, MA, USA
| | - Vladimir P Torchilin
- Department of Pharmaceutical Sciences, Center for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University Boston, MA, USA
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104
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Zhang Z, Ma R, Shi L. Cooperative macromolecular self-assembly toward polymeric assemblies with multiple and bioactive functions. Acc Chem Res 2014; 47:1426-37. [PMID: 24694280 DOI: 10.1021/ar5000264] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In the past decades, polymer based nanoscale polymeric assemblies have attracted continuous interest due to their potential applications in many fields, such as nanomedicine. Many efforts have been dedicated to tailoring the three-dimensional architecture and the placement of functional groups at well-defined positions within the polymeric assemblies, aiming to augment their function. To achieve such goals, in one way, novel polymeric building blocks can be designed by controlled living polymerization methodology and advanced chemical modifications. In contrast, by focusing on the end function, others and we have been practicing strategies of cooperative self-assembly of multiple polymeric building blocks chosen from the vast library of conventional block polymers which are easily available. The advantages of such strategies lie in the simplicity of the preparation process and versatile choice of the constituent polymers in terms of their chemical structure and functionality as well as the fact that cooperative self-assembly based on supramolecular interactions offers elegant and energy-efficient bottom-up strategies. Combination of these principles has been exploited to optimize the architecture of polymeric assemblies with improved function, to impart new functionality into micelles and to realize polymeric nanocomplexes exhibiting functional integration, similar to some natural systems like artificial viruses, molecular chaperones, multiple enzyme systems, and so forth. In this Account, we shall first summarize several straightforward designing principles with which cooperative assembly of multiple polymeric building blocks can be implemented, aiming to construct polymeric nanoassemblies with hierarchal structure and enhanced functionalities. Next, examples will be discussed to demonstrate the possibility to create multifunctional nanoparticles by combination of the designing principles and judiciously choosing of the building blocks. We focus on multifunctional nanoparticles which can partially address challenges widely existing in nanomedicine such as long blood circulation, efficient cellular uptake, and controllable release of payloads. Finally, bioactive polymeric assemblies, which have certain functions closely mimicking those of some natural systems, will be used to conceive the concept of functional integration.
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Affiliation(s)
- Zhenkun Zhang
- Key Laboratory of Functional
Polymer Materials of Ministry of Education, Institute of Polymer Chemistry,
State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China
- Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Rujiang Ma
- Key Laboratory of Functional
Polymer Materials of Ministry of Education, Institute of Polymer Chemistry,
State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China
- Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
| | - Linqi Shi
- Key Laboratory of Functional
Polymer Materials of Ministry of Education, Institute of Polymer Chemistry,
State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China
- Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
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105
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Rao J, Hottinger C, Khan A. Enzyme-triggered cascade reactions and assembly of abiotic block copolymers into micellar nanostructures. J Am Chem Soc 2014; 136:5872-5. [PMID: 24720255 DOI: 10.1021/ja501632r] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Catalytic action of an enzyme is shown to transform a non-assembling block copolymer, composed of a completely non-natural repeat unit structure, into a self-assembling polymer building block. To achieve this, poly(styrene) is combined with an enzyme-sensitive methacrylate-based polymer segment carrying carefully designed azobenzene side chains. Once exposed to the enzyme azoreductase, in the presence of coenzyme NADPH, the azobenzene linkages undergo a bond scission reaction. This triggers a spontaneous 1,6-self-elimination cascade process and transforms the initially hydrophobic methacrylate polymer segment into a hydrophilic hydroxyethyl methacrylate structure. This change in chemical polarity of one of the polymer blocks confers an amphiphilic character to the diblock copolymer and permits it to self-assemble into a micellar nanostructure in water.
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Affiliation(s)
- Jingyi Rao
- Department of Materials, ETH-Zürich , CH-8093 Zürich, Switzerland
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106
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Cao W, Gu Y, Meineck M, Li T, Xu H. Tellurium-Containing Polymer Micelles: Competitive-Ligand-Regulated Coordination Responsive Systems. J Am Chem Soc 2014; 136:5132-7. [DOI: 10.1021/ja500939m] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Wei Cao
- Key Lab of Organic Optoelectronics
and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yuwei Gu
- Key Lab of Organic Optoelectronics
and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Myriam Meineck
- Key Lab of Organic Optoelectronics
and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Tianyu Li
- Key Lab of Organic Optoelectronics
and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Huaping Xu
- Key Lab of Organic Optoelectronics
and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China
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107
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Wang K, Guo DS, Zhao MY, Liu Y. A Supramolecular Vesicle Based on the Complexation ofp-Sulfonatocalixarene with Protamine and its Trypsin-Triggered Controllable-Release Properties. Chemistry 2014; 22:1475-83. [DOI: 10.1002/chem.201303963] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/18/2013] [Indexed: 01/12/2023]
Affiliation(s)
- Kui Wang
- Department of Chemistry; State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules; Key Laboratory of Inorganic-Organic Hybrid; Functional Material Chemistry; Ministry of Education; College of Chemistry; Tianjin Normal University; Tianjin 300387 P.R. China
| | - Dong-Sheng Guo
- Department of Chemistry; State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Meng-Yao Zhao
- Department of Chemistry; State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
| | - Yu Liu
- Department of Chemistry; State Key Laboratory of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P.R. China
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108
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Cai Y, Shi Y, Wang H, Wang J, Ding D, Wang L, Yang Z. Environment-sensitive fluorescent supramolecular nanofibers for imaging applications. Anal Chem 2014; 86:2193-9. [PMID: 24467604 DOI: 10.1021/ac4038653] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The combination of an environment-sensitive fluorophore, 4-nitro-2,1,3-benzoxadiazole (NBD), and peptides have yielded supramolecular nanofibers with enhanced cellular uptake, brighter fluorescence, and significant fluorescence responses to external stimuli. We had designed and synthesized NBD-FFYEEGGH that can form supramolecular nanofibers and emit brighter than its counterpart of NBD-EEGGH without the self-assembling property. The nanofibers of NBD-FFYEEGGH could specifically bind to Cu(2+), leading to the formation of fluorescence quenched elongated nanofibers. This fluorescence quenching property was enhanced in self-assembling nanofibers and could be applied for detection of Cu(2+) in vitro and within cells. In a further step, an enzyme-cleavable DEVD peptide was placed between NBD-FFY and the copper binding tripeptide GGH. The resulting self-assembling peptide NBD-FFFDEVDGGH also showed strong fluorescence quenching to Cu(2+). Upon the enzymatic cleavage to remove the Cu(2+)-binding GGH tripeptide from the peptide, the fluorescence was restored. The cellular uptake of nanofibers was better than that of free molecules because of endocytosis. The supramolecular nanofibers with fluorescence turn-on property could therefore be applied for detection of caspase-3 activity in vitro and within cells. We believe that the combination of environment-sensitive fluorescence and fast responses of supramolecular nanostructures would lead to a useful platform to detect many important analytes.
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Affiliation(s)
- Yanbin Cai
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), ‡College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University , Tianjin 300071, P. R. China
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109
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Samarajeewa S, Zentay RP, Jhurry ND, Li A, Seetho K, Zou J, Wooley KL. Programmed hydrolysis of nanoassemblies by electrostatic interaction-mediated enzymatic-degradation. Chem Commun (Camb) 2014; 50:968-70. [PMID: 24301076 PMCID: PMC4165354 DOI: 10.1039/c3cc46013d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Electrostatic interaction-mediated enzymatic-hydrolysis of poly(lactide)-containing nanoscale assemblies is described. At physiological pH, degradable core-shell morphologies with charged shells can readily attract or repel enzymes carrying opposite or similar charges, respectively.
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Affiliation(s)
- Sandani Samarajeewa
- Departments of Chemistry and Chemical Engineering, Texas A&M University, P. O. Box 30012, College Station, Texas 77842, USA.
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110
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Zhang X, Zeng Y, Yu T, Chen J, Yang G, Li Y. Tetrathiafulvalene terminal-decorated PAMAM Dendrimers for triggered release synergistically stimulated by redox and CB[7]. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:718-726. [PMID: 24417726 DOI: 10.1021/la404349w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A series of polyamidoamine (PAMAM) dendrimers with tetrathiafulvalene (TTF) at the periphery (Gn-PAMAM-TTF), generation 0-2, were synthesized. These functionalized dendrimers exist as nanospheres with diameters around 80-100 nm in aqueous phase, which can encapsulate hydrophobic molecules. The terminal TTF groups can go through a reversible redox process upon addition of the oxidizing and reducing agents. Each terminal TTF(+•) group of the oxidized Gn-PAMAM-TTF assembled with cucurbit[7]uril (CB[7]) forming a 1:1 inclusion complex with association constants of (3.14 ± 0.36) × 10(5), (1.29 ± 0.12) × 10(6), and (1.79 ± 0.24) × 10(6) M(-1) for generation 0-2, respectively, even at the aggregate state. The formation of the inclusion complex loosened the structure of the nanospheres and initiated the release of cargo, and the release mechanism was validated by dynamic light scattering (DLS), cryo-transmission electron microscopy (TEM), and electron paramagnetic resonance (EPR) experiments. This study provides a potential strategy for the development of drug delivery systems synergistically triggered by redox and supramolecular assembly.
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Affiliation(s)
- Xiaohui Zhang
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Republic of China
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111
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Niu Y, Li Y, Lu Y, Xu W. Spiropyran-decorated light-responsive amphiphilic poly(α-hydroxy acids) micelles constructed via a CuAAC reaction. RSC Adv 2014. [DOI: 10.1039/c4ra11550c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Light-responsive amphiphilic poly(α-hydroxy acids) with pendent spiropyran chromophore was synthesized and the resultant micelles assembled in aqueous solution presented excellent light-response.
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Affiliation(s)
- Yile Niu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yefei Li
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yanbing Lu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Weijian Xu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
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112
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Wang D, Tong G, Dong R, Zhou Y, Shen J, Zhu X. Self-assembly of supramolecularly engineered polymers and their biomedical applications. Chem Commun (Camb) 2014; 50:11994-2017. [DOI: 10.1039/c4cc03155e] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Self-assembly behavior of supramolecularly engineered polymers and their biomedical applications have been summarized.
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Affiliation(s)
- Dali Wang
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai, P. R. China
| | - Gangsheng Tong
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai, P. R. China
- Instrumental Analysis Center
| | - Ruijiao Dong
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai, P. R. China
| | - Yongfeng Zhou
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai, P. R. China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
| | - Jian Shen
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of Biomedical Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- 210046 Nanjing, P. R. China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering
- State Key Laboratory of Metal Matrix Composites
- Shanghai Jiao Tong University
- 200240 Shanghai, P. R. China
- Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
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113
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Hu D, Li Y, Niu Y, Li L, He J, Liu X, Xia X, Lu Y, Xiong Y, Xu W. Photo-responsive reversible micelles based on azobenzene-modified poly(carbonate)s via azide–alkyne click chemistry. RSC Adv 2014. [DOI: 10.1039/c4ra07345b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We provide a convenient method to construct photo-responsive poly(carbonate)s via ring-opening polymerization of cyclic carbonates followed by azide–alkyne click chemistry.
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Affiliation(s)
- Ding Hu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yefei Li
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yile Niu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Ling Li
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Jingwen He
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Xiangyu Liu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Xinnian Xia
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yanbing Lu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Yuanqin Xiong
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
| | - Weijian Xu
- Institute of Polymer Science and Engineering
- College of Chemistry & Chemical Engineering
- Hunan University
- Changsha 410082, China
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114
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Zhao J, Chen C, Li D, Liu X, Wang H, Jin Q, Ji J. Biocompatible and biodegradable supramolecular assemblies formed with cucurbit[8]uril as a smart platform for reduction-triggered release of doxorubicin. Polym Chem 2014. [DOI: 10.1039/c3py01538f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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115
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Liu K, Kang Y, Wang Z, Zhang X. 25th anniversary article: reversible and adaptive functional supramolecular materials: "noncovalent interaction" matters. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:5530-5548. [PMID: 24038309 DOI: 10.1002/adma201302015] [Citation(s) in RCA: 212] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 06/26/2013] [Indexed: 06/02/2023]
Abstract
Supramolecular materials held together by noncovalent interactions, such as hydrogen bonding, host-guest interactions, and electrostatic interactions, have great potential in material science. The unique reversibility and adaptivity of noncovalent intreractions have brought about fascinating new functions that are not available by their covalent counterparts and have greatly enriched the realm of functional materials. This review article aims to highlight the very recent and important progresses in the area of functional supramoleuclar materials, focusing on adaptive mechanical materials, smart sensors with enhanced selectivity, soft luminescent and electronic nanomaterials, and biomimetic and biomedical materials with tailored structures and functions. We cannot write a complete account of all the interesting work in this area in one article, but we hope that it can in a way reflect the current situation and future trends in this prosperously developing area of functional supramolecular materials.
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Affiliation(s)
- Kai Liu
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, PR China
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116
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Xu H, Chen D, Wang S, Zhou Y, Sun J, Zhang W, Zhang X. Macromolecular self-assembly and nanotechnology in China. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2013; 371:20120305. [PMID: 24000357 DOI: 10.1098/rsta.2012.0305] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Macromolecular self-assembly refers to the assembly of synthetic polymers, biomacromolecules and supra-molecular polymers. Through macromolecular self-assembly, the fabrication of ordered structures at different scales, the control of the dynamic assembly process and the integrations of advanced functions can be realized. Macromolecular self-assembly and nanotechnology research in China has developed rapidly, from the early periods of follow-up at low to high level and progress into a stage of innovation and creation. This review selects some representative progresses achieved recently, aiming to reflect the current status of macromolecular self-assembly and nanotechnology research in China.
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Affiliation(s)
- Huaping Xu
- Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
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117
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Wang H, Tang L, Tu C, Song Z, Yin Q, Yin L, Zhang Z, Cheng J. Redox-responsive, core-cross-linked micelles capable of on-demand, concurrent drug release and structure disassembly. Biomacromolecules 2013; 14:3706-12. [PMID: 24003893 DOI: 10.1021/bm401086d] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We developed camptothecin (CPT)-conjugated, core-cross-linked (CCL) micelles that are subject to redox-responsive cleavage of the built-in disulfide bonds, resulting in disruption of the micellar structure and rapid release of CPT. CCL micelles were prepared via coprecipitation of disulfide-containing CPT-poly(tyrosine(alkynyl)-OCA) conjugate and monomethoxy poly(ethylene glycol)-b-poly(tyrosine(alkynyl)-OCA), followed by cross-linking of the micellar core via azide-alkyne click chemistry. CCL micelles exhibited excellent stability under physiological conditions, while they underwent rapid dissociation in reduction circumstance, resulting in burst release of CPT. These redox-responsive CCL micelles showed enhanced cytotoxicity against human breast cancer cells in vitro.
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Affiliation(s)
- Hua Wang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign , 1304 West Green Street, Urbana, Illinois 61801, United States
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118
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Rao J, Khan A. Enzyme sensitive synthetic polymer micelles based on the azobenzene motif. J Am Chem Soc 2013; 135:14056-9. [PMID: 24033317 DOI: 10.1021/ja407514z] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this study, we investigate the potential of an artificial structural motif, azobenzene, in the preparation of enzyme sensitive polymeric nanostructures. For this purpose, an azobenzene linkage is established at the copolymer junction of an amphiphilic diblock copolymer. This polymer assembles into a micellar structure in water. Treatment with the enzyme azoreductase, in the presence of coenzyme NADPH, results in the cleavage of the azo-based copolymer junction and disruption of the micellar assembly. These results suggest that azobenezene is a useful non-natural structural motif for the preparation of enzyme responsive polymer nanoparticles. Due to the presence of azoreductase in the human intestine, such nanomaterials are anticipated to find applicability in the arena of colon-specific delivery systems.
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Affiliation(s)
- Jingyi Rao
- Department of Materials, ETH-Zürich , CH-8093 Zürich, Switzerland
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119
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Hahn ME, Randolph LM, Adamiak L, Thompson MP, Gianneschi NC. Polymerization of a peptide-based enzyme substrate. Chem Commun (Camb) 2013; 49:2873-5. [PMID: 23450132 DOI: 10.1039/c3cc40472b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Polymers of norbornenyl-modified peptide-based enzyme substrates have been prepared via ring-opening metathesis polymerization (ROMP). Peptides displayed on water-soluble homopolymers retain the ability to be enzymatically processed by a disease-associated enzyme. In contrast, when the peptides are densely arrayed on a nanoparticle derived from a self-assembled amphiphilic block-copolymer, they function with reduced activity as enzymatic substrates.
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Affiliation(s)
- Michael E Hahn
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093, USA
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120
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Xu H, Cao W, Zhang X. Selenium-containing polymers: promising biomaterials for controlled release and enzyme mimics. Acc Chem Res 2013; 46:1647-58. [PMID: 23581522 DOI: 10.1021/ar4000339] [Citation(s) in RCA: 402] [Impact Index Per Article: 36.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Although researchers have made great progress in the development of responsive polymeric materials for controlled drug release or diagnostics over the last 10 years, therapeutic results still lag behind expectations. The development of special materials that respond to physiological relevant concentrations, typically within the micromolar or nanomolar concentration regime, remains challenging. Therefore, researchers continue to pursue new biomaterials with unique properties and that respond to mild biochemical signals or biomarkers. Selenium is an essential element in human body with potential antioxidant properties. Because of selenium's electronegativity and atomic radius, selenium-containing compounds exhibit unique bond energy (C-Se bond 244 kJ mol⁻¹; Se-Se bond 172 kJ mol⁻¹). These values give the C-Se or Se-Se covalent bonds dynamic character and make them responsive to mild stimuli. Therefore, selenium-containing polymers can disassemble in response to changes under physiological relevant conditions. This property makes them a promising biomaterial for controlled release of drugs or synthetic enzyme mimics. Until recently, few researchers have looked at selenium-containing polymers as novel biomaterials. In this Account, we summarize our recent research on selenium-containing polymers and show their potential application as mild-responsive drug delivery vehicles and artificial enzymes. We begin by reviewing the current state of the art in the synthesis of selenium-containing main chain block copolymers. We highlight the dual redox and gamma-irradiation behaviors of diselenide-containing block copolymers assemblies, discussing the possibility of their use in a combination of chemotherapy and actinotherapy. We also describe the coordination of platinum with monoselenide containing block copolymers. Such structures offer the possibility of fabricating multidrug systems for cooperative chemotherapy. In addition, we summarize the methods for the covalent and noncovalent preparation of selenium-containing polymers with side chains, which highlight the opportunity to reversibly tune the amphiphilicity of selenium-containing polymers. Finally, we present strategies for the design of highly efficient selenium-containing dendritic polymers that can mimic enzymes. This field is still in its infancy period, and further research can only be limited by our imagination.
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Affiliation(s)
- Huaping Xu
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Wei Cao
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People’s Republic of China
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121
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Huang X, Huang G, Zhang S, Sagiyama K, Togao O, Ma X, Wang Y, Li Y, Soesbe TC, Sumer BD, Takahashi M, Sherry AD, Gao J. Multi-Chromatic pH-Activatable19F-MRI Nanoprobes with Binary ON/OFF pH Transitions and Chemical-Shift Barcodes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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122
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Huang X, Huang G, Zhang S, Sagiyama K, Togao O, Ma X, Wang Y, Li Y, Soesbe TC, Sumer BD, Takahashi M, Sherry AD, Gao J. Multi-chromatic pH-activatable 19F-MRI nanoprobes with binary ON/OFF pH transitions and chemical-shift barcodes. Angew Chem Int Ed Engl 2013; 52:8074-8. [PMID: 23788453 DOI: 10.1002/anie.201301135] [Citation(s) in RCA: 92] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 03/26/2013] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaonan Huang
- Department of Pharmacology, Harold C. Simmons Comprehensive Cancer Center, UT Southwestern Medical Center at Dallas, 5323 Harry Hines Blvds, Dallas, TX 75390, USA
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123
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Miao X, Cao W, Zheng W, Wang J, Zhang X, Gao J, Yang C, Kong D, Xu H, Wang L, Yang Z. Switchable Catalytic Activity: Selenium-Containing Peptides with Redox-Controllable Self-Assembly Properties. Angew Chem Int Ed Engl 2013; 52:7781-5. [DOI: 10.1002/anie.201303199] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Indexed: 11/06/2022]
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124
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Miao X, Cao W, Zheng W, Wang J, Zhang X, Gao J, Yang C, Kong D, Xu H, Wang L, Yang Z. Switchable Catalytic Activity: Selenium-Containing Peptides with Redox-Controllable Self-Assembly Properties. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303199] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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125
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Chen H, Ruckenstein E. Formation and degradation of multicomponent multicore micelles: insights from dissipative particle dynamics simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5428-5434. [PMID: 23578256 DOI: 10.1021/la400033s] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Dissipative particle dynamics (DPD) simulation is employed to examine (i) the multicomponent multicore micelle (MMM) formation from two kinds of star-shaped copolymers: A2B4B4 and C2B4B4 where A, B, and C are the segments of the copolymers and (ii) the degradation of multicomponent multicore micelles. Regarding the micelle formation, single-core micelles with the core composed of two components (SCII), multicomponent multicore micelles with each core composed of two components (MMII), multicomponent multicore micelles with each of the cores composed of one component (MMI), and multicomponent multicore rod micelles (MMRI) are considered. By changing the ratio between the number of segments of one of the polymers and the total number of segments of the two copolymers, the number of cores generated and their composition can be controlled. Considering that only C2B4B4 is degraded to 2C1 + 2B4, it was found that SCII, MMII, and MMI micelles degraded to a single irregular network core, to multicores with cores formed of loose aggregates, and to multicore micelles, respectively. The dynamics of micelle formation has several stages (small aggregates (nuclei) → growth of aggregates → micellization) whereas the dynamics of degradation involves the diffusion of the degraded components inside and outside micelles and the rearrangement of the cores of the micelles into new cores.
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Affiliation(s)
- Houyang Chen
- Department of Chemical and Biological Engineering, State University of New York at Buffalo, Buffalo, New York 14260-4200, United States.
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126
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Wang L, Li LL, Ma HL, Wang H. Recent advances in biocompatible supramolecular assemblies for biomolecular detection and delivery. CHINESE CHEM LETT 2013. [DOI: 10.1016/j.cclet.2013.03.018] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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127
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Caponi PF, Ulijn RV. Enzyme-responsive Drug-delivery Systems. SMART MATERIALS FOR DRUG DELIVERY 2013. [DOI: 10.1039/9781849736800-00232] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This chapter offers an overview of recent advances in enzyme-responsive materials potentially useful for drug delivery. The systems already developed provide new insights into the chemical design rules and response dynamics achievable by exploiting enzymatic catalysis as selective triggers in controlled release. The first section provides a general introduction about the role of enzymes in diseased states and examples where molecular therapeutics have been developed specifically to interfere with biochemical processes. The parameters to consider in order to develop enzyme-responsive drug-delivery systems are then discussed. Different approaches to design hydrogels, micelles and silica nanocontainers with moieties that can be substrates of enzymes are described with the help of relevant examples that highlight their performance. The research in this area is gaining momentum at a significant pace and it is likely that the first therapeutic enzyme responsive materials will reach the clinic in the next decade.
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Affiliation(s)
- Pier-Francesco Caponi
- WestCHEM/Department of Pure and Applied Chemistry The University of Strathclyde, Glasgow, G1 1XL Scotland, UK
| | - Rein V. Ulijn
- WestCHEM/Department of Pure and Applied Chemistry The University of Strathclyde, Glasgow, G1 1XL Scotland, UK
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128
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Dong J, Xun Z, Zeng Y, Yu T, Han Y, Chen J, Li YY, Yang G, Li Y. A versatile and robust vesicle based on a photocleavable surfactant for two-photon-tuned release. Chemistry 2013; 19:7931-6. [PMID: 23589382 DOI: 10.1002/chem.201300526] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Indexed: 02/05/2023]
Abstract
A small amphiphile that contains a coumarin unit and alkynyl groups, as a two-photon-cleavable segment and polymerizable groups, respectively, was designed and synthesized. The amphiphile showed a critical aggregation concentration of about 4.6×10(-5) M and formed a vesicle-type assembly. The formed vesicles were stabilized by in situ "click" polymerization without altering their morphology. Hydrophobic and hydrophilic guests can be encapsulated within the vesicle membrane and inside the aqueous core of the vesicle, respectively. The loaded guests can be released from the vesicle by using UV or near-IR stimuli, through splitting up the amphiphilic structure of the amphiphile. Distinguished dose-controlled photorelease of the polymeric vesicle is achieved with the maintenance of vesicular integrity, which makes the guest release dependent on the amount of cleavage of the amphiphilic structure during irradiation. This study provides a potential strategy for the development of versatile and stable drug-delivery systems that offer sustained and photo-triggered release.
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Affiliation(s)
- Jianming Dong
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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129
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Guo DS, Zhang TX, Wang YX, Liu Y. Enzyme-responsive supramolecular polymers by complexation of bis(p-sulfonatocalixarenes) with suberyl dicholine-based pseudorotaxane. Chem Commun (Camb) 2013; 49:6779-81. [DOI: 10.1039/c3cc41918e] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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130
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Li L, Raghupathi K, Yuan C, Thayumanavan S. Surface charge generation in nanogels for activated cellular uptake at tumor-relevant pH. Chem Sci 2013. [DOI: 10.1039/c3sc50899d] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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131
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Cheng Y, He C, Xiao C, Ding J, Ren K, Yu S, Zhuang X, Chen X. Reduction-responsive cross-linked micelles based on PEGylated polypeptides prepared via click chemistry. Polym Chem 2013. [DOI: 10.1039/c3py00364g] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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132
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Han P, Li S, Cao W, Li Y, Sun Z, Wang Z, Xu H. Red light responsive diselenide-containing block copolymer micelles. J Mater Chem B 2013; 1:740-743. [DOI: 10.1039/c2tb00186a] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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133
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134
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Wang YX, Guo DS, Cao Y, Liu Y. Phosphatase-responsive amphiphilic calixarene assembly. RSC Adv 2013. [DOI: 10.1039/c3ra40453f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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135
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Ge Z, Liu S. Functional block copolymer assemblies responsive to tumor and intracellular microenvironments for site-specific drug delivery and enhanced imaging performance. Chem Soc Rev 2013; 42:7289-325. [DOI: 10.1039/c3cs60048c] [Citation(s) in RCA: 752] [Impact Index Per Article: 68.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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136
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Wang G, Wang C, Wang Z, Zhang X. H-shaped supra-amphiphiles based on a dynamic covalent bond. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14567-14572. [PMID: 22985216 DOI: 10.1021/la303272b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The imine bond, a kind of dynamic covalent bond, is used to bind two bolaform amphiphiles together with spacers, yielding H-shaped supra-amphiphiles. Micellar aggregates formed by the self-assembly of the H-shaped supra-amphiphiles are observed. When pH is tuned down from basic to slightly acidic, the benzoic imine bond can be hydrolyzed, leading to the dissociation of H-shaped supra-amphiphiles. Moreover, H-shaped supra-amphiphiles have a lower critical micelle concentration than their building blocks, which is very helpful in enhancing the stability of the benzoic imine bond being hydrolyzed by acid. The surface tension isotherms of the H-shaped supra-amphiphiles with different spacers indicate their twisty conformation at a gas-water interface. The study of H-shaped supra-amphiphiles can enrich the family of amphiphiles, and moreover, the pH-responsiveness may make them apply to controlled or targetable drug delivery in a biological environment.
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Affiliation(s)
- Guangtong Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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137
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Kang Y, Wang C, Liu K, Wang Z, Zhang X. Enzyme-responsive polymeric supra-amphiphiles formed by the complexation of chitosan and ATP. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14562-14566. [PMID: 23025557 DOI: 10.1021/la303271f] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Chitosan and adenosine-5'-triphosphate (ATP) are employed as building blocks to fabricate polymeric supra-amphiphiles based on electrostatic interactions, which can self-assemble to form spherical aggregates. The spherical aggregates inherit the phosphotase responsiveness of ATP. Compared to our previous work, this enzyme-responsive system can be more biocompatible and block polymers are not needed in preparation, which makes it possible to fabricate the chitosan-based enzyme-responsive assemblies in a large-scale, cheap way. Therefore, the application of the assemblies for nanocontainers and drug delivery is greatly anticipated.
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Affiliation(s)
- Yuetong Kang
- Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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138
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Zelzer M, Todd SJ, Hirst AR, McDonald TO, Ulijn RV. Enzyme responsive materials: design strategies and future developments. Biomater Sci 2012; 1:11-39. [PMID: 32481995 DOI: 10.1039/c2bm00041e] [Citation(s) in RCA: 227] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Enzyme responsive materials (ERMs) are a class of stimuli responsive materials with broad application potential in biological settings. This review highlights current and potential future design strategies for ERMs and provides an overview of the present state of the art in the area.
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Affiliation(s)
- Mischa Zelzer
- WestCHEM, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, U.K..
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139
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Jiao D, Geng J, Loh XJ, Das D, Lee TC, Scherman OA. Supramolecular Peptide Amphiphile Vesicles through Host-Guest Complexation. Angew Chem Int Ed Engl 2012; 51:9633-7. [DOI: 10.1002/anie.201202947] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/18/2012] [Indexed: 01/18/2023]
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140
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Jiao D, Geng J, Loh XJ, Das D, Lee TC, Scherman OA. Supramolecular Peptide Amphiphile Vesicles through Host-Guest Complexation. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202947] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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141
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The shape of things to come: importance of design in nanotechnology for drug delivery. Ther Deliv 2012; 3:181-94. [PMID: 22834196 DOI: 10.4155/tde.11.156] [Citation(s) in RCA: 151] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The design of nanoparticle (NP) size, shape and surface chemistry has a significant impact on their performance. While the influences of the particle size and surface chemistry on drug delivery have been studied extensively, little is known about the effect of particle shapes on nanomedicine. In this perspective article, we discuss recent progress on the design and fabrication of NPs of various shapes and their unique delivery properties. The shapes of these drug carriers play an important role in therapeutic delivery processes, such as particle adhesion, distribution and cell internalization. We envision that stimuli-responsive NPs, which actively change their shapes and other properties, might pave way to the next generation of nanomedicine.
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142
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Ji X, Li J, Chen J, Chi X, Zhu K, Yan X, Zhang M, Huang F. Supramolecular Micelles Constructed by Crown Ether-Based Molecular Recognition. Macromolecules 2012. [DOI: 10.1021/ma301162s] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Xiaofan Ji
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jinying Li
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jianzhuang Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Xiaodong Chi
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Kelong Zhu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Xuzhou Yan
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Mingming Zhang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Feihe Huang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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143
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A Systematic Study on the Self-Assembly Behaviour of Multi Component Fmoc-Amino Acid-Poly(oxazoline) Systems. Polymers (Basel) 2012. [DOI: 10.3390/polym4031399] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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144
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Feng K, Xie N, Chen B, Zhang LP, Tung CH, Wu LZ. Reversible Light-Triggered Transition of Amphiphilic Random Copolymers. Macromolecules 2012. [DOI: 10.1021/ma300734z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Ke Feng
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials, Technical Institute of Physics and Chemistry,
the Chinese Academy of Sciences, Beijing
100190, P. R. China
| | - Nan Xie
- School
of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing 100069, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials, Technical Institute of Physics and Chemistry,
the Chinese Academy of Sciences, Beijing
100190, P. R. China
| | - Li-Ping Zhang
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials, Technical Institute of Physics and Chemistry,
the Chinese Academy of Sciences, Beijing
100190, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials, Technical Institute of Physics and Chemistry,
the Chinese Academy of Sciences, Beijing
100190, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion
and Optoelectronic Materials, Technical Institute of Physics and Chemistry,
the Chinese Academy of Sciences, Beijing
100190, P. R. China
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145
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Liu K, Yao Y, Wang C, Liu Y, Li Z, Zhang X. From Bola-amphiphiles to Supra-amphiphiles: The Transformation from Two-Dimensional Nanosheets into One-Dimensional Nanofibers with Tunable-Packing Fashion of n-Type Chromophores. Chemistry 2012; 18:8622-8. [DOI: 10.1002/chem.201200898] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Indexed: 12/23/2022]
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146
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Hu J, Zhang G, Liu S. Enzyme-responsive polymeric assemblies, nanoparticles and hydrogels. Chem Soc Rev 2012; 41:5933-49. [PMID: 22695880 DOI: 10.1039/c2cs35103j] [Citation(s) in RCA: 485] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Being responsive and adaptive to external stimuli is an intrinsic feature characteristic of all living organisms and soft matter. Specifically, responsive polymers can exhibit reversible or irreversible changes in chemical structures and/or physical properties in response to a specific signal input such as pH, temperature, ionic strength, light irradiation, mechanical force, electric and magnetic fields, and analyte of interest (e.g., ions, bioactive molecules, etc.) or an integration of them. The past decade has evidenced tremendous growth in the fundamental research of responsive polymers, and accordingly, diverse applications in fields ranging from drug or gene nanocarriers, imaging, diagnostics, smart actuators, adaptive coatings, to self-healing materials have been explored and suggested. Among a variety of external stimuli that have been utilized for the design of novel responsive polymers, enzymes have recently emerged to be a promising triggering motif. Enzyme-catalyzed reactions are highly selective and efficient toward specific substrates under mild conditions. They are involved in all biological and metabolic processes, serving as the prime protagonists in the chemistry of living organisms at a molecular level. The integration of enzyme-catalyzed reactions with responsive polymers can further broaden the design flexibility and scope of applications by endowing the latter with enhanced triggering specificity and selectivity. In this tutorial review, we describe recent developments concerning enzyme-responsive polymeric assemblies, nanoparticles, and hydrogels by highlighting this research area with selected literature reports. Three different types of systems, namely, enzyme-triggered self-assembly and aggregation of synthetic polymers, enzyme-driven disintegration and structural reorganization of polymeric assemblies and nanoparticles, and enzyme-triggered sol-to-gel and gel-to-sol transitions, are described. Their promising applications in drug controlled release, biocatalysis, imaging, sensing, and diagnostics are also discussed.
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Affiliation(s)
- Jinming Hu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, Anhui Province, PR China
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147
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Guo DS, Wang K, Wang YX, Liu Y. Cholinesterase-Responsive Supramolecular Vesicle. J Am Chem Soc 2012; 134:10244-50. [DOI: 10.1021/ja303280r] [Citation(s) in RCA: 360] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dong-Sheng Guo
- Department of Chemistry, State Key Laboratory
of Elemento-Organic
Chemistry, Nankai University, Tianjin 300071,
People's Republic of China
| | - Kui Wang
- Department of Chemistry, State Key Laboratory
of Elemento-Organic
Chemistry, Nankai University, Tianjin 300071,
People's Republic of China
| | - Yi-Xuan Wang
- Department of Chemistry, State Key Laboratory
of Elemento-Organic
Chemistry, Nankai University, Tianjin 300071,
People's Republic of China
| | - Yu Liu
- Department of Chemistry, State Key Laboratory
of Elemento-Organic
Chemistry, Nankai University, Tianjin 300071,
People's Republic of China
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148
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Wang C, Wang Z, Zhang X. Amphiphilic building blocks for self-assembly: from amphiphiles to supra-amphiphiles. Acc Chem Res 2012; 45:608-18. [PMID: 22242811 DOI: 10.1021/ar200226d] [Citation(s) in RCA: 560] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The process of self-assembly spontaneously creates well-defined structures from various chemical building blocks. Self-assembly can include different levels of complexity: it can be as simple as the dimerization of two small building blocks driven by hydrogen bonding or as complicated as a cell membrane, a remarkable supramolecular architecture created by a bilayer of phospholipids embedded with functional proteins. The study of self-assembly in simple systems provides a fundamental understanding of the driving forces and cooperativity behind these processes. Once the rules are understood, these guidelines can facilitate the research of highly complex self-assembly processes. Among the various components for self-assembly, an amphiphilic molecule, which contains both hydrophilic and hydrophobic parts, forms one of the most powerful building blocks. When amphiphiles are dispersed in water, the hydrophilic component of the amphiphile preferentially interacts with the aqueous phase while the hydrophobic portion tends to reside in the air or in the nonpolar solvent. Therefore, the amphiphiles aggregate to form different molecular assemblies based on the repelling and coordinating forces between the hydrophilic and hydrophobic parts of the component molecules and the surrounding medium. In contrast to conventional amphiphiles, supra-amphiphiles are constructed on the basis of noncovalent interactions or dynamic covalent bonds. In supra-amphiphiles, the functional groups can be attached to the amphiphiles by noncovalent synthesis, greatly speeding their construction. The building blocks for supra-amphiphiles can be either small organic molecules or polymers. Advances in the development of supra-amphiphiles will not only enrich the family of conventional amphiphiles that are based on covalent bonds but will also provide a new kind of building block for the preparation of complex self-assemblies. When polymers are used to construct supra-amphiphiles, the resulting molecules are known as superamphiphiles. This Account will focus on the use of amphiphiles and supra-amphiphiles for self-assembly at different levels of complexity. We introduce strategies for the fabrication of robust assemblies through self-assembly of amphiphiles. We describe the supramolecular approach for the molecular design of amphiphiles through the enhancement of intermolecular interaction among the amphiphiles. In addition, we describe polymerization under mild conditions to stabilize the assemblies formed by self-assembly of amphiphiles. Finally, we highlight self-assembly methods driven by noncovalent interactions or dynamic covalent bonds for the fabrication of supra-amphiphiles with various topologies. Further self-assembly of supra-amphiphiles provides new building blocks for complex structures, and the dynamic nature of the supra-amphiphiles endows the assemblies with stimuli-responsive functions.
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Affiliation(s)
- Chao Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
| | - Zhiqiang Wang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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149
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Xing Y, Wang C, Han P, Wang Z, Zhang X. Acetylcholinesterase responsive polymeric supra-amphiphiles for controlled self-assembly and disassembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6032-6036. [PMID: 22404254 DOI: 10.1021/la300612k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have fabricated enzyme responsive polymeric supra-amphiphiles by mixing a block copolymer of poly(ethylene glycol)-block-poly(acrylic acid) with myristoylcholine chloride in water. The polymeric supra-amphiphiles self-assemble into spherical aggregates with sizes varying from about 40 to 150 nm. Moreover, the spherical aggregates can be disassembled triggered by acetylcholinesterase, an enzyme which can cut off the ester linkage of myristoylcholine chloride. Nile red can be loaded into the spherical aggregates and released in several hours upon the treatment of acetylcholinesterase. The releasing rate is rather fast considering that it takes more than 150 h for Nile red to diffuse out of the spherical aggregates without addition of acetylcholinesterase. It is anticipated that the new enzyme responsive polymeric supra-amphiphile may be explored as a carrier for drug delivery.
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Affiliation(s)
- Yibo Xing
- Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China
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150
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Zhang X, Chu X, Wang L, Wang H, Liang G, Zhang J, Long J, Yang Z. Rational Design of a Tetrameric Protein to Enhance Interactions between Self-Assembled Fibers Gives Molecular Hydrogels. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108612] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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