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Li Z, Chen S, Binder WH, Zhu J. Hydrogen-Bonded Polymer Nanomedicine with AIE Characteristic for Intelligent Cancer Therapy. ACS Macro Lett 2023; 12:1384-1388. [PMID: 37767902 DOI: 10.1021/acsmacrolett.3c00493] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2023]
Abstract
One of the major goals of biomedical science is to pioneer advanced strategies toward precise and smart medicine. Hydrogen-bonding (H-bonding) assembly incorporated with an aggregation-induced emission (AIE) capability can serve as a powerful tool for developing supramolecular nanomedicine with clear tumor imaging and smart therapeutic performance. We here report a H-bonded polymeric nanoformulation with an AIE characteristic toward smart antitumor therapy. To do so, we first design a structurally novel tetraphenylethylene (TPE)-based H-bonding theranostic prodrug, TPE-(FUA)4, characterized by four chemotherapeutic fluorouracil-1-acetic acid (FUA) moieties arched to the TPE core. A six-arm star-shaped amphiphilic polymer vehicle, P(DAP-co-OEGEA)6, is prepared, bearing hydrophilic and biocompatible POEGEA (poly(oligo (ethylene glycol) ethyl acrylate) segments, along with a hydrophobic and H-bonding PDAP (poly(diaminopyridine acrylamide)) segment. Thanks to the establishment of the DAP/FUA H-bonding association, incorporating the TPE-(FUA)4 prodrug to the P(DAP-co-OEGEA)6 vehicle can yield H-bond cross-linked nanoparticles with interpenetrating networks. For the first time, AIE luminogens are interwoven into a six-arm star-shaped polymer via an intrinsic H-bonding array of the chemotherapeutic agent FUA, thus imposing an effective restriction of TPE molecular rotations. Concomitantly, encapsulated photothermal agent (IR780) via a hydrophobic interaction facilitates the formation of nanoassemblies, TPE-(FUA)4/IR780@P(DAP-co-OEGEA)6, featuring synergistic cancer chemo/photothermal therapy (CT/PTT). Our study can contribute a practical solution to fulfill biomedical requirements with a conductive advance in precision nanomedicine.
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Affiliation(s)
- Zeke Li
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Senbin Chen
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
| | - Wolfgang H Binder
- Institute of Chemistry, Martin-Luther University Halle-Wittenberg, von Danckelmann-Platz 4, D-06120, Halle (Saale), Germany
| | - Jintao Zhu
- Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan 430074, China
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2
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Liu Y, Chen X, Liu X, Guan W, Lu C. Aggregation-induced emission-active micelles: synthesis, characterization, and applications. Chem Soc Rev 2023; 52:1456-1490. [PMID: 36734474 DOI: 10.1039/d2cs01021f] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Aggregation-induced emission (AIE)-active micelles are a type of fluorescent functional materials that exhibit enhanced emissions in the aggregated surfactant state. They have received significant interest due to their excellent fluorescence efficiency in the aggregated state, remarkable processability, and solubility. AIE-active micelles can be designed through the self-assembly of amphipathic AIE luminogens (AIEgens) and the encapsulation of non-emissive amphipathic molecules in AIEgens. Currently, a wide range of AIE-active micelles have been constructed, with a significant increase in research interest in this area. A series of advanced techniques has been used to characterize AIE-active micelles, such as cryogenic-electron microscopy (Cryo-EM) and confocal laser scanning microscopy (CLSM). This review provides an overview of the synthesis, characterization, and applications of AIE-active micelles, especially their applications in cell and in vivo imaging, biological and organic compound sensors, anticancer drugs, gene delivery, chemotherapy, photodynamic therapy, and photocatalytic reactions, with a focus on the most recent developments. Based on the synergistic effect of micelles and AIE, it is anticipated that this review will guide the development of innovative and fascinating AIE-active micelle materials with exciting architectures and functions in the future.
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Affiliation(s)
- Yuhao Liu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Xueqian Chen
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Xiaoting Liu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.
| | - Weijiang Guan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chao Lu
- Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450001, China. .,State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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3
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Tian S, Lu Y, He Z, Yue Q, Zhuang Z, Wang Y, Meng F, Luo L. Polydiacetylene-based poly-ion complex enabling aggregation-induced emission and photodynamic therapy dual turn-on for on-demand pathogenic bacteria elimination. Sci China Chem 2022. [DOI: 10.1007/s11426-022-1317-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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Pham TT, Pham TD, Yusa SI. pH- and Thermo-Responsive Water-Soluble Smart Polyion Complex (PIC) Vesicle with Polyampholyte Shells. Polymers (Basel) 2022; 14:1659. [PMID: 35566829 PMCID: PMC9099632 DOI: 10.3390/polym14091659] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 04/15/2022] [Accepted: 04/18/2022] [Indexed: 02/06/2023] Open
Abstract
A diblock copolymer (P(VBTAC/NaSS)17-b-PAPTAC50; P(VS)17A50) composed of amphoteric random copolymer, poly(vinylbenzyl trimethylammonium chloride-co-sodium p-styrensunfonate) (P(VBTAC/NaSS); P(VS)) and cationic poly(3-(acrylamidopropyl) trimethylammonium chloride) (PAPTAC; A) block, and poly(acrylic acid) (PAAc49) were prepared via a reversible addition-fragmentation chain transfer radical polymerization. Scrips V, S, and A represent VBTAC, NaSS, and PAPTAC blocks, respectively. Water-soluble polyion complex (PIC) vesicles were formed by mixing P(VS)17A50 and PAAc49 in water under basic conditions through electrostatic interactions between the cationic PAPTAC block and PAAc49 with the deprotonated pendant carboxylate anions. The PIC vesicle collapsed under an acidic medium because the pendant carboxylate anions in PAAc49 were protonated to delete the anionic charges. The PIC vesicle comprises an ionic PAPTAC/PAAc membrane coated with amphoteric random copolymer P(VS)17 shells. The PIC vesicle showed upper critical solution temperature (UCST) behavior in aqueous solutions because of the P(VS)17 shells. The pH- and thermo-responsive behavior of the PIC vesicle were studied using 1H NMR, static and dynamic light scattering, and percent transmittance measurements. When the ratio of the oppositely charged polymers in PAPTAC/PAAc was equal, the size and light scattering intensity of the PIC vesicle reached maximum values. The hydrophilic guest molecules can be encapsulated into the PIC vesicle at the base medium and released under acidic conditions. It is expected that the PIC vesicles will be applied as a smart drug delivery system.
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Affiliation(s)
- Thu Thao Pham
- Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, Hyogo, Japan;
| | - Tien Duc Pham
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hoan Kiem, Hanoi 100000, Vietnam;
| | - Shin-ichi Yusa
- Department of Applied Chemistry, Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji 671-2280, Hyogo, Japan;
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Supramolecular Assembly and Reversible Transition and of Chitosan Fluorescent Micelles by Noncovalent Modulation. ADVANCES IN POLYMER TECHNOLOGY 2021. [DOI: 10.1155/2021/5175473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Chitosan-based intelligent artificial systems have been of increasing interest for their biocompatibility, multifunctionality, biological activity, and low cost. Herein, we report the fabrication of supramolecular nanoparticles based on water-soluble chitosan (WCS) and 1,1
,1
,1
-(ethene-1,1,2,2-tetrayl)tetrakis(benzene-4,1-diyl) tetrakis(azanediyl)tetraacetic acid (TPE-(N-COOH)4), which is capable of reversible transition between polyion complexes (PICs) and hydrogen bonding complexes (HBCs) with tunable aggregation-induced emission driven by pH value. The PIC micelles could be formed via electrostatic interaction between ammonium cations and carboxylate anions under mild alkaline conditions. The formation of the micelles dramatically blocks the nonradiative pathway and enhances the fluorescence of TPE moieties, and the maximum fluorescence intensity was achieved near the isoelectric point due to the restriction of intramolecular motion. In addition, the fluorescence intensity and size of the PIC micelles exhibited a temperature response in the range from 20 to 80°C. Upon adjusting the solution pH to 2, the PIC micelles were reconstructed into hydrogen-bonding complexes while the hydrogen bonding interaction between the protonated carboxyl groups of TPE-(N-COOH)4 and chitosan. Moreover, the size of the micelles underwent a remarkable decrease, whereas the fluorescence emission was further enhanced by ~6.25-fold. The pH actuated micellar transition from PIC to HBC with tunable fluorescence performance is fully reversible. This study provides novel multifunctional materials that are of great importance for their potential application in the fields of optoelectronic devices and chemical and biomedical sensors.
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6
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Shah S, Leon L. Structural dynamics, phase behavior, and applications of polyelectrolyte complex micelles. Curr Opin Colloid Interface Sci 2021. [DOI: 10.1016/j.cocis.2021.101424] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Wang M, Choi B, Wei X, Feng A, Thang SH. Synthesis, self-assembly, and base-pairing of nucleobase end-functionalized block copolymers in aqueous solution. Polym Chem 2018. [DOI: 10.1039/c8py01201f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
As a novel strategy, nucleobase-containing copolymers are created for molecular recognition and nucleobase releasing.
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Affiliation(s)
- Mu Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Bonnie Choi
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Xiaohu Wei
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Anchao Feng
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - San H. Thang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering
- College of Materials Science and Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
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Yoshihara D, Noguchi T, Roy B, Sakamoto J, Yamamoto T, Shinkai S. Design of a Hypersensitive pH-Sensory System Created by a Combination of Charge Neutralization and Aggregation-Induced Emission (AIE). Chemistry 2017; 23:17663-17666. [DOI: 10.1002/chem.201703560] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Indexed: 12/17/2022]
Affiliation(s)
- Daisuke Yoshihara
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Takao Noguchi
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Bappaditya Roy
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
| | - Junji Sakamoto
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Tatsuhiro Yamamoto
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
| | - Seiji Shinkai
- Nanotechnology Laboratory; Institute of Systems Information Technologies and Nanotechnologies (ISIT); 4-1 Kyudaishinmachi, Nishi-ku Fukuoka 819-0388 Japan
- Institute for Advanced Study; Kyushu University; 744 Moto-oka Nishi-ku Fukuoka 819-0395 Japan
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10
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Liu H, Zhang J, Dai W, Zhao Y. Synthesis and self-assembly of a dual-responsive monocleavable ABCD star quaterpolymer. Polym Chem 2017. [DOI: 10.1039/c7py01638g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A modularly synthesized core-functionalized PEG-PSt-PCL-PAA miktoarm star can self-assemble into hollow nanocapsules that are sensitive to pH/redox stimuli and H-bond/polyion complexation.
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Affiliation(s)
- Huanhuan Liu
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Jian Zhang
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Wenxue Dai
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
| | - Youliang Zhao
- Suzhou Key Laboratory of Macromolecular Design and Precision Synthesis
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
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11
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Campos-Gaxiola JJ, García-Grajeda BA, Hernández-Ahuactzi IF, Guerrero-Álvarez JA, Höpfl H, Cruz-Enríquez A. Supramolecular networks in molecular complexes of pyridine boronic acids and polycarboxylic acids: synthesis, structural characterization and fluorescence properties. CrystEngComm 2017. [DOI: 10.1039/c7ce00762k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
3- and 4-pyridineboronic acids have been combined with trimesic and pyromellitic acids to give three molecular complexes.
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Affiliation(s)
| | | | | | - Jorge A. Guerrero-Álvarez
- Centro de Investigaciones Químicas
- Instituto de Investigación en Ciencias Básicas y Aplicadas
- Universidad Autónoma del Estado de Morelos
- Cuernavaca
- Mexico
| | - Herbert Höpfl
- Centro de Investigaciones Químicas
- Instituto de Investigación en Ciencias Básicas y Aplicadas
- Universidad Autónoma del Estado de Morelos
- Cuernavaca
- Mexico
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12
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Wang Z, Wang Z, Xia H. Bioinspired ultrasound-responsive fluorescent metal–ligand cross-linked polymer assemblies. Polym Chem 2017. [DOI: 10.1039/c7py00256d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We proposed a general strategy to construct bioinspired ultrasound-responsive fluorescent metal–ligand cross-linked polymer assemblies.
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Affiliation(s)
- Zhenhua Wang
- State Key Lab of Polymer Materials Engineering
- Polymer Research Institute
- Sichuan University
- Chengdu 610065
- China
| | - Zhanhua Wang
- State Key Lab of Polymer Materials Engineering
- Polymer Research Institute
- Sichuan University
- Chengdu 610065
- China
| | - Hesheng Xia
- State Key Lab of Polymer Materials Engineering
- Polymer Research Institute
- Sichuan University
- Chengdu 610065
- China
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13
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Chen J, Yan B, Wang X, Huang Q, Thundat T, Zeng H. Core cross-linked double hydrophilic block copolymer micelles based on multiple hydrogen-bonding interactions. Polym Chem 2017. [DOI: 10.1039/c7py00210f] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Facile preparation and characterization of core cross-linked micelles via strong multiple hydrogen bonds using well-defined thermo-responsive double hydrophilic block copolymers.
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Affiliation(s)
- Jingsi Chen
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Bin Yan
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
- College of Light Industry
| | - Xiaogang Wang
- Material Science & Engineering Science College
- Taiyuan University of Science and Technology
- Taiyuan 030024
- China
| | - Qingxue Huang
- Material Science & Engineering Science College
- Taiyuan University of Science and Technology
- Taiyuan 030024
- China
| | - Thomas Thundat
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
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14
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Zhang J, Xiao Y, Luo X, Wen L, Heise A, Lang M. Schizophrenic poly(ε-caprolactone)s: synthesis, self-assembly and fluorescent decoration. Polym Chem 2017. [DOI: 10.1039/c7py00461c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Double hydrophilic copolymers PCCL-b-PPIL and their pyrene-modified copolymers showed pH-responsive “schizophrenic” aggregation behaviors.
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Affiliation(s)
- Jun Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Yan Xiao
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Xueli Luo
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Lianlei Wen
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
| | - Andreas Heise
- Department of Pharmaceutical & Medicinal Chemistry
- Royal College of Surgeons in Ireland
- Dublin 2
- Ireland
| | - Meidong Lang
- Shanghai Key Laboratory of Advanced Polymeric Materials
- Key Laboratory for Ultrafine Materials of Ministry of Education
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237
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15
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Wang G, Zhang L. Synthesis, self-assembly and pH sensitivity of PDEAEMA–PEG–PDEAEMA triblock copolymer micelles for drug delivery. REACT FUNCT POLYM 2016. [DOI: 10.1016/j.reactfunctpolym.2016.08.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Li W, Huang H, Deng J. Bioinspired hybrid material composed of helical polymer grafts and graphene oxide: Reversible transformation of particulate and extended structures of the grafts and application in chiral enrichment. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Tian S, Liu G, Wang X, Zhang G, Hu J. pH-Responsive Tumor-Targetable Theranostic Nanovectors Based on Core Crosslinked (CCL) Micelles with Fluorescence and Magnetic Resonance (MR) Dual Imaging Modalities and Drug Delivery Performance. Polymers (Basel) 2016; 8:polym8060226. [PMID: 30979319 PMCID: PMC6432225 DOI: 10.3390/polym8060226] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 05/30/2016] [Accepted: 06/02/2016] [Indexed: 11/16/2022] Open
Abstract
The development of novel theranostic nanovectors is of particular interest in treating formidable diseases (e.g., cancers). Herein, we report a new tumor-targetable theranostic agent based on core crosslinked (CCL) micelles, possessing tumor targetable moieties and fluorescence and magnetic resonance (MR) dual imaging modalities. An azide-terminated diblock copolymer, N₃-POEGMA-b-P(DPA-co-GMA), was synthesized via consecutive atom transfer radical polymerization (ATRP), where OEGMA, DPA, and GMA are oligo(ethylene glycol)methyl ether methacrylate, 2-(diisopropylamino)ethyl methacrylate, and glycidyl methacrylate, respectively. The resulting diblock copolymer was further functionalized with DOTA(Gd) (DOTA is 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetrakisacetic acid) or benzaldehyde moieties via copper(I)-catalyzed alkyne-azide cycloaddition (CuAAC) chemistry, resulting in the formation of DOTA(Gd)-POEGMA-b-P(DPA-co-GMA) and benzaldehyde-POEGMA-b-P(DPA-co-GMA) copolymers. The resultant block copolymers co-assembled into mixed micelles at neutral pH in the presence of tetrakis[4-(2-mercaptoethoxy)phenyl]ethylene (TPE-4SH), which underwent spontaneous crosslinking reactions with GMA residues embedded within the micellar cores, simultaneously switching on TPE fluorescence due to the restriction of intramolecular rotation. Moreover, camptothecin (CPT) was encapsulated into the crosslinked cores at neutral pH, and tumor-targeting pH low insertion peptide (pHLIP, sequence: AEQNPIYWARYADWLFTTPLLLLDLALLVDADEGTCG) moieties were attached to the coronas through the Schiff base chemistry, yielding a theranostic nanovector with fluorescence and MR dual imaging modalities and tumor-targeting capability. The nanovectors can be efficiently taken up by A549 cells, as monitored by TPE fluorescence. After internalization, intracellular acidic pH triggered the release of loaded CPT, killing cancer cells in a selective manner. On the other hand, the nanovectors labeled with DOTA(Gd) contrast agents exhibited increased relaxivity (r₁ = 16.97 mM-1·s-1) compared to alkynyl-DOTA(Gd) small molecule precursor (r₁ = 3.16 mM-1·s-1). Moreover, in vivo MRI (magnetic resonance imaging) measurements revealed CCL micelles with pHLIP peptides exhibiting better tumor accumulation and MR imaging performance as well.
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Affiliation(s)
- Sidan Tian
- Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Guhuan Liu
- Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Xiaorui Wang
- Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Guoying Zhang
- Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
| | - Jinming Hu
- Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
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Guan X, Zhang D, Jia T, Zhang Y, Meng L, Jin Q, Ma H, Lu D, Lai S, Lei Z. Intriguingly tuning the fluorescence of AIEgen using responsive polyelectrolyte microspheres. RSC Adv 2016. [DOI: 10.1039/c6ra23380e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We successfully synthesized counterion-sensitive TPE–METAC polyelectrolyte microspheres and tuned its fluorescence and size by ClO4−, PF6− and TFSI−.
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