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Ghosh A, Sharma M, Zhao Y. Cell-penetrating protein-recognizing polymeric nanoparticles through dynamic covalent chemistry and double imprinting. Nat Commun 2024; 15:3731. [PMID: 38702306 PMCID: PMC11068882 DOI: 10.1038/s41467-024-48131-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 04/22/2024] [Indexed: 05/06/2024] Open
Abstract
Molecular recognition of proteins is key to their biological functions and processes such as protein-protein interactions (PPIs). The large binding interface involved and an often relatively flat binding surface make the development of selective protein-binding materials extremely challenging. A general method is reported in this work to construct protein-binding polymeric nanoparticles from cross-linked surfactant micelles. Preparation involves first dynamic covalent chemistry that encodes signature surface lysines on a protein template. A double molecular imprinting procedure fixes the binding groups on the nanoparticle for these lysine groups, meanwhile creating a binding interface complementary to the protein in size, shape, and distribution of acidic groups on the surface. These water-soluble nanoparticles possess excellent specificities for target proteins and sufficient affinities to inhibit natural PPIs such as those between cytochrome c (Cytc) and cytochrome c oxidase (CcO). With the ability to enter cells through a combination of energy-dependent and -independent pathways, they intervene apoptosis by inhibiting the PPI between Cytc and the apoptotic protease activating factor-1 (APAF1). Generality of the preparation and the excellent molecular recognition of the materials have the potential to make them powerful tools to probe protein functions in vitro and in cellulo.
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Affiliation(s)
- Avijit Ghosh
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA
| | - Mansi Sharma
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA, 50011-3111, USA.
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2
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Wang Z, Lu Y, Yang J, Xiao W, Chen T, Yi C, Xu Z. Engineering the Hydrophobic Microenvironment in Polystyrene-Supported Artificial Catalytic Triad Nanocatalysts: An Effective Strategy for Improving Catalytic Performance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5929-5935. [PMID: 37040596 DOI: 10.1021/acs.langmuir.3c00486] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Hydrophobic environments have been identified as one of the main parameters affecting the catalytic performance of artificial catalytic triads but are often ignored as an approach to engineering these catalysts. Here, we have developed a simple yet powerful strategy to engineer the hydrophobic environment in polystyrene-supported artificial catalytic triad (PSACT) nanocatalysts. Hydrophobic copolymers containing either oligo(ethylene glycol) side chains or hydrocarbon side chains were synthesized and used for the preparation of nanocatalysts through nanoprecipitation in aqueous media. By using the hydrolysis of 4-nitrophenyl acetate (4NA) as a model reaction, we studied the influence of chemical structures and effective constituent ratios of hydrophobic copolymers on the catalytic performance of PSACT nanocatalysts. Additionally, PSACT nanocatalysts could catalyze the hydrolysis of a few carboxylic esters, even polymers, and be reused for five consecutive runs without significant loss of catalytic activity. This strategy may open an avenue for engineering other artificial enzymes, and these PSACT nanocatalysts have potential applications for the hydrolysis of carboxylic esters.
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Affiliation(s)
- Zihao Wang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Yizhuo Lu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Jinxiang Yang
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Wei Xiao
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Tianyou Chen
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Changfeng Yi
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Zushun Xu
- Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
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3
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Jones BE, Kelly EA, Cowieson N, Divitini G, Evans RC. Light-Responsive Molecular Release from Cubosomes Using Swell-Squeeze Lattice Control. J Am Chem Soc 2022; 144:19532-19541. [PMID: 36222426 DOI: 10.1021/jacs.2c08583] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Stimuli-responsive materials are crucial to advance controlled delivery systems for drugs and catalysts. Lyotropic liquid crystals (LLCs) have well-defined internal structures suitable to entrap small molecules and can be broken up into low-viscosity dispersions, aiding their application as delivery systems. In this work, we demonstrate the first example of light-responsive cubic LLC dispersions, or cubosomes, using photoswitchable amphiphiles to enable external control over the LLC structure and subsequent on-demand release of entrapped guest molecules. Azobenzene photosurfactants (AzoPS), containing a neutral tetraethylene glycol head group and azobenzene-alkyl tail, are combined (from 10-30 wt %) into monoolein-water systems to create LLC phases. Homogenization of the bulk LLC forms dispersions of particles, ∼200 nm in diameter with internal bicontinuous primitive cubic phases, as seen using small-angle X-ray scattering and cryo-transmission electron microscopy. Notably, increasing the AzoPS concentration leads to swelling of the cubic lattice, offering a method to tune the internal nanoscale structure. Upon UV irradiation, AzoPS within the cubosomes isomerizes within seconds, which in turn leads to squeezing of the cubic lattice and a decrease in the lattice parameter. This squeeze mechanism was successfully harnessed to enable phototriggerable release of trapped Nile Red guest molecules from the cubosome structure in minutes. The ability to control the internal structure of LLC dispersions using light, and the dramatic effect this has on the retention of entrapped molecules, suggests that these systems may have huge potential for the next-generation of nanodelivery.
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Affiliation(s)
- Beatrice E Jones
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom.,Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Elaine A Kelly
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Nathan Cowieson
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Giorgio Divitini
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
| | - Rachel C Evans
- Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge CB3 0FS, United Kingdom
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4
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Wang H, Fliedel C, Manoury E, Poli R. Core-crosslinked micelles with a poly-anionic poly(styrene sulfonate)-based outer shell made by RAFT polymerization. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Gevorgyan A, Hopmann KH, Bayer A. Improved Buchwald–Hartwig Amination by the Use of Lipids and Lipid Impurities. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ashot Gevorgyan
- Department of Chemistry, UiT The Arctic University of Norway, 9037 Tromsø, Norway
| | - Kathrin H. Hopmann
- Department of Chemistry, UiT The Arctic University of Norway, 9037 Tromsø, Norway
| | - Annette Bayer
- Department of Chemistry, UiT The Arctic University of Norway, 9037 Tromsø, Norway
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6
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Zhang C, Dong X, Ong SY, Yao SQ. Live-Cell Imaging of Survivin mRNA by Using a Dual-Color Surface-Cross-Linked Nanoquencher. Anal Chem 2021; 93:12081-12089. [PMID: 34436865 DOI: 10.1021/acs.analchem.1c02385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Precise detection of cancer-related mRNAs can significantly benefit the early diagnosis and potential therapy of cancers. Herein, we report organic dark quencher-encapsulated surface-cross-linked micelles (qSCMs) as a new sort of nanoquencher for construction of potential multiple-color fluorescence imaging nanosensors. Such nanoquenchers featured simple preparation (one-pot), broad-spectrum quenching (450-800 nm), high quenching efficiency (>94%), good stability, negligible cargo leakage, facile covalent surface modification, and finally excellent modularity. As a proof-of-concept demonstration, a mRNA-detecting qSCM nanosensor was generated, capable of simultaneous live-cell imaging of endogenous actin mRNA (a house-keeping gene) and cancer-related survivin mRNA. This nanosensor was found to be GSH- and DNase I-resistant, and with actin mRNA as an intrinsic reference, it was used to image the precise survivin mRNA expression across different mammalian cells through convenient normalization of the signal readouts. Moreover, the nanosensor was further used to quantitatively image the downregulation of endogenous survivin mRNA in HeLa cells upon treatment of YM155 (an imidazolium bioactive compound known to suppresses endogenous survivin mRNA expression). These results clearly demonstrated the promising application of these qSCMs as new nanoquenchers in potential multicolor imaging of various endogenous biomarkers.
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Affiliation(s)
- Changyu Zhang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Xiao Dong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - Sing Yee Ong
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.,National University of Singapore Graduate School, Integrative Sciences and Engineering Programme (ISEP), National University of Singapore, University Hall, Tan Chin Tuan Wing, 21 Lower Kent Ridge Road, No. 04-02, Singapore 119077, Singapore
| | - Shao Q Yao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.,National University of Singapore Graduate School, Integrative Sciences and Engineering Programme (ISEP), National University of Singapore, University Hall, Tan Chin Tuan Wing, 21 Lower Kent Ridge Road, No. 04-02, Singapore 119077, Singapore
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7
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Fotopoulou E, Titilas I, Ronconi L. Metallodrugs as Anticancer Chemotherapeutics and Diagnostic Agents: A Critical Patent Review (2010-2020). Recent Pat Anticancer Drug Discov 2021; 17:42-54. [PMID: 34493191 DOI: 10.2174/1574892816666210907101146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/07/2021] [Accepted: 07/07/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND The development of metallodrugs with potential applications in cancer treatment and diagnosis has been a hot topic since the approval and subsequent marketing of the anticancer drug cisplatin in 1978. Since then, thousands of metal-based derivatives have been reported and evaluated for their chemotherapeutic or tumor imaging properties, but only a very limited number gained clinical status. Nonetheless, research in the field has been increasing exponentially over the years, especially in a view to exploiting novel drug designing approaches and strategies aimed at improving pharmacological outcomes and, at the same time, reducing side-effects. OBJECTIVE This review article reports on the patents filed during the last decade and strictly focusing on the development of metal-based anticancer and diagnostic agents. The goal is to identify the latest trends and designing strategies in the field, which would represent a valuable starting point to researchers interested in the development of metallodrugs. METHODS The most relevant patents filed in the 2010-2020 timeframe have been retrieved from various databases using dedicated search engines (such as SciFinder, Google Patents, PatentPak, Espacenet, Global Dossier, PatentScope), sorted by type of metallodrug and screened to include those reporting a substantial amount of biological data. RESULTS The majority of patents here reviewed are concerned with metallodrugs (mostly platinum-based) showing interesting pharmacological properties but no specific tumor-targeting features. Nonetheless, some promising trends in the development of novel drug delivery strategies and/or metallodrugs with potential applications in targeted chemotherapy are envisaged. CONCLUSION In this review, the latest trends in the development of metallodrugs from recent patents are summarized and critically discussed. Such trends would be of interest not only to the scientific community but also to lay audiences aiming to broaden their knowledge of the field and industrial stakeholders potentially interested in the exploitation and commercialization of this class of pharmaceuticals.
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Affiliation(s)
- Eirini Fotopoulou
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
| | - Ioannis Titilas
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
| | - Luca Ronconi
- School of Chemistry, College of Science and Engineering, National University of Ireland Galway, University Road, Galway H91 TK33. Ireland
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8
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Qu P, Kuepfert M, Ahmed E, Liu F, Weck M. Cross‐Linked Polymeric Micelles as Catalytic Nanoreactors. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Peiyuan Qu
- Molecular Design Institute and Department of Chemistry New York University 100 Washington Square East New York, NY 10003 USA
| | - Michael Kuepfert
- Molecular Design Institute and Department of Chemistry New York University 100 Washington Square East New York, NY 10003 USA
| | - Eman Ahmed
- Molecular Design Institute and Department of Chemistry New York University 100 Washington Square East New York, NY 10003 USA
| | - Fangbei Liu
- Molecular Design Institute and Department of Chemistry New York University 100 Washington Square East New York, NY 10003 USA
| | - Marcus Weck
- Molecular Design Institute and Department of Chemistry New York University 100 Washington Square East New York, NY 10003 USA
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9
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Massi L, Najer A, Chapman R, Spicer CD, Nele V, Che J, Booth MA, Doutch JJ, Stevens MM. Tuneable peptide cross-linked nanogels for enzyme-triggered protein delivery. J Mater Chem B 2020; 8:8894-8907. [PMID: 33026394 PMCID: PMC7613372 DOI: 10.1039/d0tb01546f] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Many diseases are associated with the dysregulated activity of enzymes, such as matrix metalloproteinases (MMPs). This dysregulation can be leveraged in drug delivery to achieve disease- or site-specific cargo release. Self-assembled polymeric nanoparticles are versatile drug carrier materials due to the accessible diversity of polymer chemistry. However, efficient loading of sensitive cargo, such as proteins, and introducing functional enzyme-responsive behaviour remain challenging. Herein, peptide-crosslinked, temperature-sensitive nanogels for protein delivery were designed to respond to MMP-7, which is overexpressed in many pathologies including cancer and inflammatory diseases. The incorporation of N-cyclopropylacrylamide (NCPAM) into N-isopropylacrylamide (NIPAM)-based copolymers enabled us to tune the polymer lower critical solution temperature from 33 to 44 °C, allowing the encapsulation of protein cargo and nanogel-crosslinking at slightly elevated temperatures. This approach resulted in nanogels that were held together by MMP-sensitive peptides for enzyme-specific protein delivery. We employed a combination of cryogenic transmission electron microscopy (cryo-TEM), dynamic light scattering (DLS), small angle neutron scattering (SANS), and fluorescence correlation spectroscopy (FCS) to precisely decipher the morphology, self-assembly mechanism, enzyme-responsiveness, and model protein loading/release properties of our nanogel platform. Simple variation of the peptide linker sequence and combining multiple different crosslinkers will enable us to adjust our platform to target specific diseases in the future.
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Affiliation(s)
- Lucia Massi
- Department of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, UK.
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10
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Zhang Q, Chen Y, Lu R, Yao Y, Li C, Yu Y, Zhang S. Cross-linked small-molecule capsules with excitation wavelength-dependent photoluminescence and high loading capacity: design, synthesis and application in imaging-guided drug delivery. J Mater Chem B 2020; 8:2719-2725. [PMID: 32149293 DOI: 10.1039/c9tb02465d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cross-linked small-molecule micelles (cSMs) have found applications in many fields but their low loading capacity and non-fluorescence property hindered their further development. Herein, water-soluble organic nanoparticles were applied as templates to "stretch" the hydrophobic core of cSMs and photo-cross-linking was employed to supply photoluminescence. The resulting cross-linked small-molecule capsules (cSCs) not only reserve the superior properties of cSMs of accurate monomer, easy functionalization and robust stability, but also achieve high drug loading capacity and excitation wavelength-dependent fluorescence, where the drug loading contents (DLCs) for various hydrophobic drugs were more than 30-fold higher than that of cSMs, and the maximum quantum yield could be as high as 12.0%. Featuring these superiorities, the cSCs hold promising potential in many fields and an example of doxorubicin-loaded cSCs (DOX@cSCs) for multichannel imaging-guided drug delivery is shown in this work.
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Affiliation(s)
- Qian Zhang
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
| | - Yun Chen
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
| | - Ruilin Lu
- College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China
| | - Yongchao Yao
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
| | - Chuanqi Li
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
| | - Yunlong Yu
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China.
| | - Shiyong Zhang
- National Engineering Research Centre for Biomaterials, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China. and College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China
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11
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Yao Y, Xu D, Zhu Y, Dai X, Yu Y, Luo J, Zhang S. Dandelion flower-like micelles. Chem Sci 2019; 11:757-762. [PMID: 34123049 PMCID: PMC8146335 DOI: 10.1039/c9sc05741b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 11/23/2019] [Indexed: 11/21/2022] Open
Abstract
Dandelion flower-like micelles (DFMs) were prepared by self-assembly of polycaprolactone (PCL) functionalized surface cross-linked micelles (SCMs). Upon reductive stimuli, the SCMs can be released from the DFMs by non-Brownian motion at an average speed of 19.09 μm s-1. Similar to the property of dandelion flowers dispersing their seeds over a long distance, the DFMs demonstrated enhanced multicellular tumor spheroid (MTS) penetration, a useful property in the treatment of many diseases including cancer, infection-of-biofilm diseases and ocular problems.
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Affiliation(s)
- Yongchao Yao
- National Engineering Research Center for Biomaterials, Sichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Deqiu Xu
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University Chengdu 610041 China
- Sichuan Guojian Inspection Co., Ltd. 646000 Luzhou Sichuan China
| | - Yuhong Zhu
- National Engineering Research Center for Biomaterials, Sichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Xin Dai
- National Engineering Research Center for Biomaterials, Sichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Yunlong Yu
- National Engineering Research Center for Biomaterials, Sichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Jianbin Luo
- College of Chemistry and Environmental Protection Engineering, Southwest Minzu University Chengdu 610041 China
| | - Shiyong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University 29 Wangjiang Road Chengdu 610064 China
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12
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Chen K, Zhao Y. Effects of nano-confinement and conformational mobility on molecular imprinting of cross-linked micelles. Org Biomol Chem 2019; 17:8611-8617. [PMID: 31528942 PMCID: PMC7474537 DOI: 10.1039/c9ob01440c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Molecular imprinting is a facile method to create guest-complementary binding sites in a cross-linked polymeric network. When performed within cross-linked micelles, the resulting molecularly imprinted nanoparticles (MINPs) exhibited an extraordinary ability to distinguish subtle structural changes in the guest, including the shift of a hydrophilic or hydrophobic group by 1 carbon and addition of a single methylene/methyl group. A high surface-cross-linking density prior to core-cross-linking was key to the high-fidelity imprinting, enhancing both the binding affinity of the imprinted micelle for the template and selectivity among structural analogues. Whereas the imprinted site closely complemented the hydrophilic surface anchoring group and rigid hydrophobic aromatic core, it was expanded significantly for a conformationally mobile small group (i.e., methoxy).
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Affiliation(s)
- Kaiqian Chen
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA.
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13
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Xiang F, Li B, Zhao P, Tan J, Yu Y, Zhang S. Copper(I)‐Chelated Cross‐Linked Cyclen Micelles as a Nanocatalyst for Azide‐Alkyne Cycloaddition in Both Water and Cells. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900773] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fuqing Xiang
- National Engineering Research Centre for BiomaterialsSichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Bing Li
- National Engineering Research Centre for BiomaterialsSichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Pengxiang Zhao
- Institute of MaterialsChina Academy of Engineering Physics No. 9, Huafengxincun Jiangyou 621908 China General methods
| | - Jiangbing Tan
- National Engineering Research Centre for BiomaterialsSichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Yunlong Yu
- National Engineering Research Centre for BiomaterialsSichuan University 29 Wangjiang Road Chengdu 610064 China
| | - Shiyong Zhang
- National Engineering Research Centre for BiomaterialsSichuan University 29 Wangjiang Road Chengdu 610064 China
- College of ChemistrySichuan University 29 Wangjiang Road Chengdu 610064 China
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14
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Fa S, Zhao Y. General Method for Peptide Recognition in Water through Bioinspired Complementarity. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2019; 31:4889-4896. [PMID: 32921904 PMCID: PMC7486028 DOI: 10.1021/acs.chemmater.9b01613] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A general method for peptide recognition has been elusive despite decades of research. Strong binding and selectivity among closely related peptides are necessary for biological applications but have been difficult to achieve with synthetic receptors. With inspiration from highly specific protein-protein and protein-ligand interactions, protein-sized, water-soluble imprinted nanoparticles were prepared via templated polymerization of peptides within cross-linked micelles. Combination of hydrophobic and polar interactions afforded micromolar to submicromolar binding affinities for selected tripeptides. A "golden pair" of functional monomers was identified to enhance both the affinity and selectivity of binding, and enabled differentiation of subtly different sequences including single-point variation of lysine by arginine and insertion of a single glycine at the N- or C-terminus. Biological peptides (β-amyloid peptides) afforded even stronger binding (tens of nanomolar) due to a larger number of complementary interactions between the host and the guest, opening doors to a wide range of biological applications.
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Affiliation(s)
- Shixin Fa
- Department of Chemistry, Iowa State University, Ames, IA 50011-3111
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA 50011-3111
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15
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Hu L, Zhao Y. A Bait‐and‐Switch Method for the Construction of Artificial Esterases for Substrate‐Selective Hydrolysis. Chemistry 2019; 25:7702-7710. [DOI: 10.1002/chem.201900560] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Lan Hu
- Department of ChemistryIowa State University Ames IA 50011-3111 USA
| | - Yan Zhao
- Department of ChemistryIowa State University Ames IA 50011-3111 USA
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16
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Gunasekara RW, Zhao Y. Recognition and protection of glycosphingolipids by synthetic nanoparticle receptors. Chem Commun (Camb) 2019; 55:4773-4776. [PMID: 30946397 PMCID: PMC7474536 DOI: 10.1039/c9cc01694e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanoparticle receptors were synthesized through micellar imprinting to bind glycosphingolipids with 20-140 μM binding affinities, meanwhile distinguishing glycan composition, the number of acyl chains, and hydroxylation of acyl chains in the lipids. The strong binding enabled the receptors to protect their target glycolipids dispersed in lipid membranes from enzymatic degradation.
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Affiliation(s)
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA.
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17
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Brisson ERL, Griffith JC, Bhaskaran A, Franks GV, Connal LA. Temperature‐induced self‐assembly and metal‐ion stabilization of histidine functional block copolymers. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Emma R. L. Brisson
- Department of Chemical Engineering and Particulate Fluids Processing CentreThe University of Melbourne Parkville Victoria 3010 Australia
| | - James C. Griffith
- Materials Characterisation and Fabrication PlatformThe University of Melbourne Parkville Victoria 3010 Australia
| | - Ayana Bhaskaran
- Research School of ChemistryAustralian National University Canberra Australian Capital Territory 2601 Australia
| | - George V. Franks
- Department of Chemical Engineering and Particulate Fluids Processing CentreThe University of Melbourne Parkville Victoria 3010 Australia
| | - Luke A. Connal
- Department of Chemical Engineering and Particulate Fluids Processing CentreThe University of Melbourne Parkville Victoria 3010 Australia
- Research School of ChemistryAustralian National University Canberra Australian Capital Territory 2601 Australia
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18
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Peng HQ, Liu B, Wei P, Zhang P, Zhang H, Zhang J, Li K, Li Y, Cheng Y, Lam JWY, Zhang W, Lee CS, Tang BZ. Visualizing the Initial Step of Self-Assembly and the Phase Transition by Stereogenic Amphiphiles with Aggregation-Induced Emission. ACS NANO 2019; 13:839-846. [PMID: 30537812 DOI: 10.1021/acsnano.8b08358] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Many highly ordered structures with smart functions are generated by self-assembly with stimuli responsiveness. Despite that electron microscopes enable us to directly observe the end products, it is hard to visualize the initial step and the kinetic stimuli-responsive behavior of self-assembly. Here, we report the design and synthesis of stereogenic amphiphiles, namely, ( Z)-TPE-OEG and ( E)-TPE-OEG, with aggregation-induced emission (AIE) characteristics from the hydrophobic tetraphenylethene core and thermoresponsive behavior from the hydrophilic oligoethylene glycol monomethyl ether chain. The two isomers can be easily isolated by high-performance liquid chromatography and characterized by 2D NMR spectroscopy. While ( Z)-TPE-OEG self-assembles into vesicles, its ( E)-cousin forms micelles in water. The initial step of their self-assembly processes can be visualized based on AIE characteristics, with a sensitivity much higher than the method based on transmittance measurement. The entrapment and release capabilities of the ( Z)-stereogenic amphiphile are demonstrated by employing pyrene as a guest. The thermoresponsive behavior of the ( Z)-amphiphile results in its continuous phase transition from microscopic self-assembly to macroscopic aggregation, which is successfully visualized in situ by confocal laser scanning microscopy accompanied by the AIE technique. Such a kinetic process shows different stages according to the microscopic visualization, and these stages have never been monitored through roughly observing the appearance of precipitates. It is anticipated that this study can deepen the understanding of the self-assembly processes for better monitoring and controlling them in different systems.
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Affiliation(s)
- Hui-Qing Peng
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Bin Liu
- Center of Super-Diamond and Advanced Films (COSDAF) & Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong , China
| | - Peifa Wei
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Pengfei Zhang
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Haoke Zhang
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Jinfeng Zhang
- Center of Super-Diamond and Advanced Films (COSDAF) & Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong , China
| | - Kai Li
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Ying Li
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Yanhua Cheng
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Jacky W Y Lam
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
| | - Wenjun Zhang
- Center of Super-Diamond and Advanced Films (COSDAF) & Department of Materials Science and Engineering , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong , China
| | - Chun-Sing Lee
- Center of Super-Diamond and Advanced Films (COSDAF) & Department of Chemistry , City University of Hong Kong , Tat Chee Avenue , Kowloon , Hong Kong , China
| | - Ben Zhong Tang
- HKUST-Shenzhen Research Institute , No. 9 Yuexing first RD, South Area, Hi-tech Park , Nanshan, Shenzhen 518057 , China
- Department of Chemistry, the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced Study , The Hong Kong University of Science and Technology , Clear Water Bay , Kowloon , Hong Kong 999077 , China
- Center for Aggregation-Induced Emission, SCUT-HKUST Joint Research Institute, State Key Laboratory of Luminescent Materials and Devices , South China University of Technology , Guangzhou 510640 , China
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Pandey B, Patil NG, Bhosle GS, Ambade AV, Gupta SS. Amphiphilic Glycopolypeptide Star Copolymer-Based Cross-Linked Nanocarriers for Targeted and Dual-Stimuli-Responsive Drug Delivery. Bioconjug Chem 2018; 30:633-646. [DOI: 10.1021/acs.bioconjchem.8b00831] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Bhawana Pandey
- Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India
| | - Naganath G. Patil
- Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India
| | - Govind S. Bhosle
- Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India
| | - Ashootosh V. Ambade
- Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India
| | - Sayam Sen Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Mohanpur, Kolkata 741246, India
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20
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Zhang S, Zhao Y. Tuning surface-cross-linking of molecularly imprinted cross-linked micelles for molecular recognition in water. J Mol Recognit 2018; 32:e2769. [PMID: 30419606 DOI: 10.1002/jmr.2769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/09/2018] [Accepted: 10/15/2018] [Indexed: 12/12/2022]
Abstract
Molecular recognition in water is an important challenge in supramolecular chemistry. Surface-core double cross-linking of template-containing surfactant micelles by the click reaction and free radical polymerization yields molecularly imprinted nanoparticles (MINPs) with guest-complementary binding sites. An important property of MINP-based receptors is the surface-cross-linking between the propargyl groups of the surfactants and a diazide cross-linker. Decreasing the number of carbons in between the two azides enhanced the binding affinity of the MINPs, possibly by keeping the imprinted binding site more open prior to the guest binding. The depth of the binding pocket can be controlled by the distribution of the hydrophilic/hydrophobic groups of the template and was found to influence the binding in addition to electrostatic interactions between oppositely charged MINPs and guests. Cross-linkers with an alkoxyamine group enabled two-stage double surface-cross-linking that strengthened the binding constants by an order of magnitude, possibly by expanding the binding pocket of the MINP into the polar region. The binding selectivity among very similar isomeric structures also improved.
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Affiliation(s)
- Shize Zhang
- Department of Chemistry, Iowa State University, Ames, IA, USA
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA, USA
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21
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Nothling MD, Xiao Z, Bhaskaran A, Blyth MT, Bennett CW, Coote ML, Connal LA. Synthetic Catalysts Inspired by Hydrolytic Enzymes. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03326] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Mitchell D. Nothling
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Zeyun Xiao
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China
| | - Ayana Bhaskaran
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Mitchell T. Blyth
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Christopher W. Bennett
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Michelle L. Coote
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Luke A. Connal
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
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22
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Lu Y, Zhang E, Yang J, Cao Z. Strategies to improve micelle stability for drug delivery. NANO RESEARCH 2018; 11:4985-4998. [PMID: 30370014 PMCID: PMC6201237 DOI: 10.1007/s12274-018-2152-3] [Citation(s) in RCA: 302] [Impact Index Per Article: 43.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/10/2018] [Accepted: 07/13/2018] [Indexed: 05/22/2023]
Abstract
Micelles have been studied as drug delivery carriers for decades. Their use can potentially result in high drug accumulation at the target site through the enhanced permeability and retention effect. Nevertheless, the lack of stability of micelles in the physiological environment limits their efficacy as a drug carrier. In particular, micelles tend to disassociate and prematurely release the encapsulated drugs, lowering delivery efficacy and creating toxicity concerns. Many efforts to enhance the stability of micelles have focused mainly on decreasing the critical micelle forming concentration and improving blood circulation. Herein, we review different strategies including crosslinking and non-crosslinking approaches designed to stabilize micelles and offer perspectives on future research directions.
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Affiliation(s)
- Yang Lu
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit 48202, MI, USA
| | - Ershuai Zhang
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit 48202, MI, USA
| | - Jianhai Yang
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit 48202, MI, USA
| | - Zhiqiang Cao
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit 48202, MI, USA
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23
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Zhao Y. Sequence-Selective Recognition of Peptides in Aqueous Solution: A Supramolecular Approach through Micellar Imprinting. Chemistry 2018; 24:14001-14009. [PMID: 29694679 PMCID: PMC6150789 DOI: 10.1002/chem.201801401] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 04/20/2018] [Indexed: 11/09/2022]
Abstract
Sequence-selective recognition of peptides in water has been one of the most important and yet unsolved problems in bioorganic and supramolecular chemistry. The motivation comes from not only the importance of these molecules in biology but also the fundamental challenges involved in the research. Molecular imprinting in doubly cross-linked surfactant micelles offers a unique solution to this problem by creating a "supramolecular code" on the micelle surface that matches the structural features of the peptide chain. Hydrophobic "dimples" are constructed on imprinted micelles that match the hydrophobic side chains of the peptide precisely in size and shape. Polar binding functionalities are installed at correct positions to interact with specific acidic and basic groups on the peptide. Secondary hydrogen-bonding and electrostatic interactions are introduced through imprinting to enhance the binding affinity and specificity further. Binding affinities of tens of nanomolar are readily achieved in water for biological peptides with over a dozen residues. Excellent binding selectivity is observed even for subtly different peptides. The synthesis of these protein-sized nanoparticles involves a one-pot reaction complete within 2 days; purification requires nothing but precipitation and solvent washing. These features make the molecularly imprinted nanoparticles (MINPs) highly promising peptide-binding "artificial antibodies" for chemical and biological applications.
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Affiliation(s)
- Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA 50011-3111, U.S.A., Fax: (+1) 515-294-0105,
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24
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Fa S, Zhao Y. Water-Soluble Nanoparticle Receptors Supramolecularly Coded for Acidic Peptides. Chemistry 2018; 24:150-158. [PMID: 29096045 PMCID: PMC5891325 DOI: 10.1002/chem.201703760] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 01/20/2023]
Abstract
Sequence-specific recognition of peptides is of enormous importance to many chemical and biological applications, but has been difficult to achieve due to the minute differences in the side chains of amino acids. Acidic peptides are known to play important roles in cell growth and gene expression. In this work, we report molecularly imprinted micelles coded with molecular recognition information for the acidic and hydrophobic side chains of acidic peptides. The imprinted receptors could distinguish acidic amino acids from other polar and nonpolar amino acids, with dissociation constants of tens of nanomolar for biologically active peptides containing up to 18 amino acids.
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Affiliation(s)
- Shixin Fa
- Department of Chemistry, Iowa State University, Ames, IA 50011-3111, U.S.A
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, IA 50011-3111, U.S.A
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25
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Fa S, Zhao Y. Peptide-Binding Nanoparticle Materials with Tailored Recognition sites for Basic Peptides. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2017; 29:9284-9291. [PMID: 29725162 PMCID: PMC5926195 DOI: 10.1021/acs.chemmater.7b03253] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Peptides rich in basic residues such as lysine and arginine play important roles in biology such as bacterial defense and cell penetration. Although peptide-binding materials with high sequence-specificity have broad potential applications, the diverse functionalities of peptide side chains make their molecular recognition extremely difficult. By covalently capturing micelles of a doubly cross-linkable surfactant with solubilized peptide templates, we prepared water-soluble molecularly imprinted nanoparticles with high sequence-specificity for basic peptides. The nanoparticles interact with the side chains of lysine and arginine through hydrogen bonds strengthened by the nonpolar environment of the micelle. They have hydrophobic pockets in their core complementary to the hydrophobic side chains in size and shape. These recognition sites allowed the micelles to bind basic biological peptides strongly in water, with tens to hundreds of nanomolar in binding affinity.
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26
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Awino JK, Zhao Y. Imprinted micelles for chiral recognition in water: shape, depth, and number of recognition sites. Org Biomol Chem 2017; 15:4851-4858. [PMID: 28537295 PMCID: PMC5902669 DOI: 10.1039/c7ob00764g] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Chiral molecular recognition is important to biology, separation, and asymmetric catalysis. Because there is no direct correlation between the chiralities of the host and the guest, it is difficult to design a molecular receptor for a chiral guest in a rational manner. By cross-linking surfactant micelles containing chiral template molecules, we obtained chiral nanoparticle receptors for a number of 4-hydroxyproline derivatives. Molecular imprinting allowed us to transfer the chiral information directly from the guest to host, making the molecular recognition between the two highly predictable. Hydrophobic interactions between the host and the guest contributed strongly to the enantio- and diastereoselective differentiation of these compounds in water, whereas ion-pair interactions, which happened near the surface of the micelle, were less discriminating. The chiral recognition could be modulated by tuning the size and shape of the binding pockets.
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Affiliation(s)
- Joseph K Awino
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, USA.
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27
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Krishnakumar S, Gopidas KR. Covalent Functionalization of Organic Nanoparticles Using Aryl Diazonium Chemistry and Their Solvent-Dependent Self-Assembly. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1162-1170. [PMID: 28061527 DOI: 10.1021/acs.langmuir.6b03269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A simple method for covalent functionalization of Fréchet-type dendron nanoparticles (FDNs) using tris-bipyridylruthenium(II) is described. Covalent functionalization is achieved by chemically reducing the diazo derivative of a ruthenium(II)bipyridine complex in the presence of FDNs wherein the radical species generated gets covalently linked to the nanoparticle surface. Simplicity, rapidity, and robustness are the advantages offered by the present approach. The nanoparticles, post functionalization, were characterized using transmission electron microscopy, thermogravimetric analysis, and infrared, energy-dispersive X-ray, UV-visible, and nuclear magnetic resonance spectroscopic techniques. Depending on the solvent, the ruthenium complex-linked FDN displays a range of morphologies, including nanoparticles, fiber-networks, and nanocapsules. In the nanocapsules and fiber-networks observed in organic solvents, the ruthenium complex is confined within the interior domain of the aggregate, whereas in the nanoparticles observed in water, it is present on the periphery. The formation of predictable morphologies in different solvents plays a key role in using such self-assembled structures for various applications such as sensing, catalysis, and light harvesting. Characterization of these nanoaggregates using different spectroscopic and microscopic techniques is also described.
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Affiliation(s)
- Sreedevi Krishnakumar
- Photosciences and Photonics, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research (CSIR) , Trivandrum 695019, India
| | - Karical R Gopidas
- Photosciences and Photonics, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research (CSIR) , Trivandrum 695019, India
- Academy of Scientific and Innovative Research (AcSIR), CSIR-NIIST Campus , Thiruvananthapuram 695019, India
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28
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Gunasekara RW, Zhao Y. A General Method for Selective Recognition of Monosaccharides and Oligosaccharides in Water. J Am Chem Soc 2017; 139:829-835. [PMID: 27983819 PMCID: PMC5243169 DOI: 10.1021/jacs.6b10773] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Molecular recognition of carbohydrates plays vital roles in biology but has been difficult to achieve with synthetic receptors. Through covalent imprinting of carbohydrates in boroxole-functionalized cross-linked micelles, we prepared nanoparticle receptors for a wide variety of mono- and oligosaccharides. The boroxole functional monomer bound the sugar templates through cis-1,2-diol, cis-3,4-diol, and trans-4,6-diol. The protein-sized nanoparticles showed excellent selectivity for d-aldohexoses in water with submillimolar binding affinities and completely distinguished the three biologically important hexoses (glucose, mannose, and galactose). Glycosides with nonpolar aglycon showed stronger binding due to enhanced hydrophobic interactions. Oligosaccharides were distinguished on the basis of their monosaccharide building blocks, glycosidic linkages, chain length, as well as additional functional groups that could interact with the nanoparticles.
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Affiliation(s)
| | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
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29
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Awino JK, Gunasekara RW, Zhao Y. Selective Recognition of d-Aldohexoses in Water by Boronic Acid-Functionalized, Molecularly Imprinted Cross-Linked Micelles. J Am Chem Soc 2016; 138:9759-62. [PMID: 27442012 PMCID: PMC4982515 DOI: 10.1021/jacs.6b04613] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Molecular imprinting within cross-linked micelles using 4-vinylphenylboronate derivatives of carbohydrates provided water-soluble nanoparticle receptors selective for the carbohydrate templates. Complete differentiation of d-aldohexoses could be achieved by these receptors if a single inversion of hydroxyl occurred at C2 or C4 of the sugar or if two or more inversions took place. Glycosides with a hydrophobic aglycan displayed stronger binding due to increased hydrophobic interactions.
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Affiliation(s)
- Joseph K. Awino
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
| | | | - Yan Zhao
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111
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