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Abstract
Nano-drug delivery systems (NDDS) are functional drug-loaded nanocarriers widely applied in cancer therapy. Recently, layer-by-layer (LbL) assembled NDDS have been demonstrated as one of the most promising platforms in delivery of anticancer therapeutics. Here, a brief review of the LbL assembled NDDS for cancer treatment is presented. The fundamentals of the LbL assembled NDDS are first interpreted with an emphasis on the formation mechanisms. Afterwards, the tailored encapsulation of anticancer therapeutics in LbL assembled NDDS are summarized. The state-of-art targeted delivery of LbL assembled NDDS, with special attention to the elaborately control over the passive and active targeting delivery, are represented. Then the controlled release of LbL assembled NDDS with various stimulus responsiveness are systematically reviewed. Finally, conclusions and perspectives on further advancing the LbL assembled NDDS toward more powerful and versatile platforms for cancer therapy are discussed.
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Affiliation(s)
- Xinyi Zhang
- School of Pharmacy, Qingdao University, Qingdao, China
| | | | - Qingming Ma
- School of Pharmacy, Qingdao University, Qingdao, China
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Zhang L, Qiu G, Liu F, Liu X, Mu S, Long Y, Zhao Q, Liu Y, Gu H. Controlled ROMP synthesis of side-chain ferrocene and adamantane-containing diblock copolymer for the construction of redox-responsive micellar carriers. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Liu X, Qiu G, Zhang L, Liu F, Mu S, Long Y, Zhao Q, Liu Y, Gu H. Controlled ROMP Synthesis of Ferrocene-Containing Amphiphilic Dendronized Diblock Copolymers as Redox-Controlled Polymer Carriers. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800273] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xiong Liu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Guirong Qiu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Li Zhang
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Fangfei Liu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Shengdong Mu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Yanru Long
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
| | - Qiuxia Zhao
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Yue Liu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
| | - Haibin Gu
- Key Laboratory of Leather Chemistry and Engineering of Ministry of Education; Sichuan University; Chengdu 610065 China
- National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 China
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Redox-stimuli-responsive drug delivery systems with supramolecular ferrocenyl-containing polymers for controlled release. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.03.013] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Hailes RLN, Oliver AM, Gwyther J, Whittell GR, Manners I. Polyferrocenylsilanes: synthesis, properties, and applications. Chem Soc Rev 2016; 45:5358-407. [DOI: 10.1039/c6cs00155f] [Citation(s) in RCA: 221] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This comprehensive review covers polyferrocenylsilanes (PFSs), a well-established, readily accessible class of main chain organosilicon metallopolymer. The focus is on the recent advances involving PFS homopolymers and block copolymers and the article covers the synthesis, properties, and applications of these fascinating materials.
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Affiliation(s)
| | | | | | | | - Ian Manners
- School of Chemistry
- University of Bristol
- Bristol
- UK
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Zhu X, Jańczewski D, Guo S, Lee SSC, Parra Velandia FJ, Teo SLM, He T, Puniredd SR, Vancso GJ. Polyion multilayers with precise surface charge control for antifouling. ACS APPLIED MATERIALS & INTERFACES 2015; 7:852-861. [PMID: 25485625 DOI: 10.1021/am507371a] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on a molecular fabrication approach to precisely control surface ζ potentials of polymeric thin layers constructed by electrostatic layer-by-layer (LbL) assembly methods. The protocol established allows us to achieve surface isoelectric points (IEP) in the pH range of 6-10. Poly(acrylic acid) (PAA, a weak polyanion) and poly(diallyldimethylammonium chloride) (PDADMAC, a strong polycation) were chosen to build up the bulk films. The weak polycation polyethylenimine (PEI) was applied as a top layer. A unique feature of this approach is that the chemical composition of the top layer is not affected by the manipulation of the ζ potential of the films. Surface charge tuning is achieved by controlling the degree of ionization of the weak polyelectrolytes at various pH values and subsequent manipulation of the amount of polyelectrolyte deposited in the penultimate and last layers, respectively. Following assembly and characterization, the films were used as candidates for antifouling surfaces. The fouling behavior of barnacle cyprids and bacteria on the LbL films with similar hydrophilicity and roughness but different surface charge densities were studied. We found that more cyprids of Amphibalanus amphitrite settled on the negatively charged LbL film compared to the neutral or positively charged LbL film. In bacterial adhesion tests employing Pseudomonas, Escherichia coli, and Staphylococcus aureus, more bacteria were observed on the positively charged LbL film compared with the neutral and negatively charged LbL films, possibly as a result of the negative potential of the bacterial cell wall. The procedures proposed allow one to adjust surface isoelectric points of LbL architectures to achieve optimal antifouling performance of a given material taking into account specific pH values of the environment and the character of the fouler.
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Affiliation(s)
- Xiaoying Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 3 Research Link, Singapore 117602
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Puniredd SR, Jańczewski D, Go DP, Zhu X, Guo S, Ming Teo SL, Chen Lee SS, Vancso GJ. Imprinting of metal receptors into multilayer polyelectrolyte films: fabrication and applications in marine antifouling. Chem Sci 2015; 6:372-383. [PMID: 28966763 PMCID: PMC5586206 DOI: 10.1039/c4sc02367f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2014] [Accepted: 09/26/2014] [Indexed: 01/30/2023] Open
Abstract
Polymeric films constructed using the layer-by-layer (LbL) fabrication process were employed as a platform for metal ion immobilization and applied as a marine antifouling coating. The novel Cu2+ ion imprinting process described is based on the use of metal ion templates and LbL multilayer covalent cross-linking. Custom synthesized, peptide mimicking polycations composed of histidine grafted poly(allylamine) (PAH) to bind metal ions, and methyl ester containing polyanions for convenient cross-linking were used in the fabrication process. Two methods of LbL film formation have been investigated using alternate polyelectrolyte deposition namely non-imprinted LbLA, and imprinted LbLB. Both LbL films were cross linked at mild temperature to yield covalent bridging of the layers for improved stability in a sea water environment. A comparative study of the non-imprinted LbLA films and imprinted LbLB films for Cu2+ ion binding capacity, leaching rate and stability of the films was performed. The results reveal that the imprinted films possess enhanced affinity to retain metal ions due to the preorganization of imidazole bearing histidine receptors. As a result the binding capacity of the films for Cu2+ could be improved by seven fold. Antifouling properties of the resulting materials in a marine environment have been demonstrated against the settlement of barnacle larvae, indicating that controlled release of Cu ions was achieved.
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Affiliation(s)
- Sreenivasa Reddy Puniredd
- Institute of Materials Research and Engineering , ASTAR (Agency for Science, Technology and Research) , 3 Research Link , 117602 , Singapore . ; ; Tel: +65 6874 5443
| | - Dominik Jańczewski
- Institute of Materials Research and Engineering , ASTAR (Agency for Science, Technology and Research) , 3 Research Link , 117602 , Singapore . ; ; Tel: +65 6874 5443
| | - Dewi Pitrasari Go
- Institute of Materials Research and Engineering , ASTAR (Agency for Science, Technology and Research) , 3 Research Link , 117602 , Singapore . ; ; Tel: +65 6874 5443
| | - Xiaoying Zhu
- Institute of Materials Research and Engineering , ASTAR (Agency for Science, Technology and Research) , 3 Research Link , 117602 , Singapore . ; ; Tel: +65 6874 5443
| | - Shifeng Guo
- Institute of Materials Research and Engineering , ASTAR (Agency for Science, Technology and Research) , 3 Research Link , 117602 , Singapore . ; ; Tel: +65 6874 5443
| | - Serena Lay Ming Teo
- Tropical Marine Science Institute , National University of Singapore , 18 Kent Ridge Road , 119227 , Singapore
| | - Serina Siew Chen Lee
- Tropical Marine Science Institute , National University of Singapore , 18 Kent Ridge Road , 119227 , Singapore
| | - G Julius Vancso
- Institute of Chemical and Engineering Sciences , ASTAR , 1, Pesek Road , Jurong Island , 627833 , Singapore . ; ; Tel: +31 53 489 2974
- MESA+ Institute for Nanotechnology , Materials Science and Technology of Polymers , University of Twente , P.O. Box 217 , 7500 AE Enschede , The Netherlands
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Cumurcu A, Feng X, Ramos LD, Hempenius MA, Schön P, Vancso GJ. Sub-nanometer expansions of redox responsive polymer films monitored by imaging ellipsometry. NANOSCALE 2014; 6:12089-12095. [PMID: 25195609 DOI: 10.1039/c4nr02852j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We describe a novel approach to quantitatively visualize sub nm height changes occurring in thin films of redox active polymers upon reversible electrochemical oxidation/reduction in situ and in real-time with electrochemical imaging ellipsometry (EC-IE). Our approach is based on the utilization of a micro-patterned substrate containing circular patterns of passive (non-redox active) 11-mercapto-1-undecanol (MCU) within a redox-responsive oligoethylene sulfide end-functionalized poly(ferrocenyldimethylsilane) (ES-PFS) film on a gold substrate. The non-redox responsive MCU layer was used as a molecular reference layer for the direct visualization of the minute thickness variations of the ES-PFS film. The ellipsometric microscopy images were recorded in aqueous electrolyte solutions at potentials of -0.1 V and 0.6 V vs. Ag/AgCl corresponding to the reduced and oxidized redox states of ES-PFS, respectively. The ellipsometric contrast images showed a 37 (±2)% intensity increase in the ES-PFS layer upon oxidation. The thickness of the ES-PFS layer reversibly changed between 4.0 (±0.1) nm and 3.4 (±0.1) nm upon oxidation and reduction, respectively, as determined by IE. Additionally, electrochemical atomic force microscopy (EC-AFM) was used to verify the redox controlled thickness variations. The proposed method opens novel avenues to optically visualize minute and rapid height changes occurring e.g. in redox active (and other stimulus responsive) polymer films in a fast and non-invasive manner.
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Affiliation(s)
- Aysegul Cumurcu
- Department of Materials Science and Technology of Polymers, University of Twente, MESA+ Institute for Nanotechnology, P.O. Box 217, 7500 AE Enschede, The Netherlands.
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