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Yang K, Yang Z, Yu G, Nie Z, Wang R, Chen X. Polyprodrug Nanomedicines: An Emerging Paradigm for Cancer Therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2107434. [PMID: 34693571 DOI: 10.1002/adma.202107434] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/16/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Nanomedicines have the potential to provide advanced therapeutic strategies in combating tumors. Polymer-prodrug-based nanomedicines are particularly attractive in cancer therapies owing to the maximum drug loading, prolonged blood circulation, and reduced premature leakage and side effects in comparison with conventional nanomaterials. However, the difficulty in precisely tuning the composition and drug loading of polymer-drug conjugates leads to batch-to-batch variations of the prodrugs, thus significantly restricting their clinical translation. Polyprodrug nanomedicines inherit the numerous intrinsic advantages of polymer-drug conjugates and exhibit well-controlled composition and drug loading via direct polymerization of therapeutic monomers, representing a promising nanomedicine for clinical tumor therapies. In this review, recent advances in the development of polyprodrug nanomedicines are summarized for tumor elimination. Various types of polyprodrug nanomedicines and the corresponding properties are first summarized. The unique advantages of polyprodrug nanomedicines and their key roles in various tumor therapies are further highlighted. Finally, current challenges and the perspectives on future research of polyprodrug nanomedicines are discussed.
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Affiliation(s)
- Kuikun Yang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin, Heilongjiang, 150080, P. R. China
| | - Zhiqing Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, P. R. China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, P. R. China
| | - Guocan Yu
- Key Lab of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China
| | - Zhihong Nie
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, P. R. China
| | - Ruibing Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Science, University of Macau, Avenida da Universidade, Taipa, Macau, 999078, P. R. China
- MoE Frontiers Science Center for Precision Oncology, University of Macau, Macau, P. R. China
| | - Xiaoyuan Chen
- Departments of Diagnostic Radiology, Surgery, Chemical and Biomolecular Engineering and Biomedical Engineering, Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119074, Singapore
- Clinical Imaging Research Centre, Centre for Translational Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117599, Singapore
- Nanomedicine Translational Research Program, NUS Center for Nanomedicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117597, Singapore
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2
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Angiolini L, Valetti S, Cohen B, Feiler A, Douhal A. Fluorescence imaging of antibiotic clofazimine encapsulated within mesoporous silica particle carriers: relevance to drug delivery and the effect on its release kinetics. Phys Chem Chem Phys 2018; 20:11899-11911. [PMID: 29666860 DOI: 10.1039/c7cp08328a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report on the encapsulation of the antibiotic clofazimine (CLZ) within the pores of mesoporous silica particles having hydrophilic (CBET value of 137) and more hydrophobic (CBET value of 94 after calcination at 600 °C) surfaces. We studied the effect of pH on the released amount of CLZ in aqueous solutions and observed a maximum at pH 4.1 in correlation with the solubility of the drug. Less release of the drug was observed from the more hydrophobic particles which was attributed to a difference in the affinity of the drug to the carrier particles. Fluorescence lifetime imaging microscopy, emission spectra, and fluorescence lifetimes of single drug loaded particles provided detailed understanding and new knowledge of the physical form of the encapsulated drug and the distribution within the particles. The distribution of CLZ within the particles was independent of the surface chemistry of the particles. The confirmation of CLZ molecules as monomers or aggregates was revealed by controlled removal of the drug with solvent. Additionally, the observed optical "halo effect" in the fluorescent images was interpreted in terms of specific quenching of high concentration of molecules. The emission lifetime experiments suggest stronger interaction of CLZ with the more hydrophobic particles, which is relevant to its release. The results reported in this work demonstrate that tuning the hydrophilicity/hydrophobicity of mesoporous silica particles can be used as a tool to control the release without impacting their loading ability.
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Affiliation(s)
- Lorenzo Angiolini
- Departamento de Química Física, Facultad de Ciencias del Medio Ambiente y Bioquímica and INAMOL, Universidad de Castilla-La Mancha, Avenida Carlos III, S/N, 45071 Toledo, Spain.
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Lin SY, Wang MR, Chiu SJ, Lin CY, Hu TM. S-Nitrosothiols (SNO) as light-responsive molecular activators for post-synthesis fluorescence augmentation in fluorophore-loaded nanospheres. J Mater Chem B 2018; 6:153-164. [DOI: 10.1039/c7tb02233f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
For the first time S-nitrosothiol is engineered into fluorophore-loaded silica nanospheres for post-synthesis, light-triggered fluorescence augmentation.
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Affiliation(s)
- Shu-Yi Lin
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
| | - Meng-Ren Wang
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
| | - Shih-Jiuan Chiu
- School of Pharmacy, Taipei Medical University
- Taipei
- Republic of China
| | - Chien-Yu Lin
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University
- Taipei
- Republic of China
| | - Teh-Min Hu
- School of Pharmacy, National Defense Medical Center
- Taipei
- Republic of China
- Faculty of Pharmacy, School of Pharmaceutical Sciences, National Yang-Ming University
- Taipei
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Alarcos N, Cohen B, Ziółek M, Douhal A. Photochemistry and Photophysics in Silica-Based Materials: Ultrafast and Single Molecule Spectroscopy Observation. Chem Rev 2017; 117:13639-13720. [PMID: 29068670 DOI: 10.1021/acs.chemrev.7b00422] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Silica-based materials (SBMs) are widely used in catalysis, photonics, and drug delivery. Their pores and cavities act as hosts of diverse guests ranging from classical dyes to drugs and quantum dots, allowing changes in the photochemical behavior of the confined guests. The heterogeneity of the guest populations as well as the confinement provided by these hosts affect the behavior of the formed hybrid materials. As a consequence, the observed reaction dynamics becomes significantly different and complex. Studying their photobehavior requires advanced laser-based spectroscopy and microscopy techniques as well as computational methods. Thanks to the development of ultrafast (spectroscopy and imaging) tools, we are witnessing an increasing interest of the scientific community to explore the intimate photobehavior of these composites. Here, we review the recent theoretical and ultrafast experimental studies of their photodynamics and discuss the results in comparison to those in homogeneous media. The discussion of the confined dynamics includes solvation and intra- and intermolecular proton-, electron-, and energy transfer events of the guest within the SBMs. Several examples of applications in photocatalysis, (photo)sensors, photonics, photovoltaics, and drug delivery demonstrate the vast potential of the SBMs in modern science and technology.
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Affiliation(s)
- Noemí Alarcos
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Boiko Cohen
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
| | - Marcin Ziółek
- Quantum Electronics Laboratory, Faculty of Physics, Adam Mickiewicz University , Umultowska 85, 61-614 Poznań, Poland
| | - Abderrazzak Douhal
- Departamento de Química Física, Facultad de Ciencias Ambientales y Bioquímica, and INAMOL, Universidad de Castilla-La Mancha , Avenida Carlos III, S.N., 45071 Toledo, Spain
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Chen T, Dong B, Chen K, Zhao F, Cheng X, Ma C, Lee S, Zhang P, Kang SH, Ha JW, Xu W, Fang N. Optical Super-Resolution Imaging of Surface Reactions. Chem Rev 2017; 117:7510-7537. [DOI: 10.1021/acs.chemrev.6b00673] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Tao Chen
- State
Key Laboratory of Electroanalytical Chemistry and Jilin Province Key
Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China
- University of Chinese Academy of Science, Beijing, 100049, P. R. China
| | - Bin Dong
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Kuangcai Chen
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Fei Zhao
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Xiaodong Cheng
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Changbei Ma
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha 410013, China
| | - Seungah Lee
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Peng Zhang
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Seong Ho Kang
- Department
of Applied Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
| | - Ji Won Ha
- Department
of Chemistry, University of Ulsan, 93 Dahak-Ro, Nam-Gu, Ulsan 44610, Republic of Korea
| | - Weilin Xu
- State
Key Laboratory of Electroanalytical Chemistry and Jilin Province Key
Laboratory of Low Carbon Chemical Power, Changchun Institute of Applied Chemistry, Chinese Academy of Science, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Ning Fang
- Department
of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
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de Oliveira EMN, Coelho FL, Zanini ML, Papaléo RM, Campo LF. Iron Oxide Nanoparticles Labeled with an Excited-State Intramolecular Proton Transfer Dye. Chemphyschem 2016; 17:3176-3180. [PMID: 27324315 DOI: 10.1002/cphc.201600472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Indexed: 01/22/2023]
Abstract
Excited-state intramolecular proton transfer (ESIPT) is a particularly well known reaction that has been very little studied in magnetic environments. In this work, we report on the photophysical behavior of a known ESIPT dye of the benzothiazole class, when in solution with uncoated superparamagnetic iron oxide nanoparticles, and when grafted to silica-coated iron oxide nanoparticles. Uncoated iron oxide nanoparticles promoted the fluorescence quenching of the ESIPT dye, resulting from collisions during the lifetime of the excited state. The assembly of iron oxide nanoparticles with a shell of silica provided recovery of the ESIPT emission, due to the isolation promoted by the silica shell. The silica network gives protection against the fluorescence quenching of the dye, allowing the nanoparticles to act as a bimodal (optical and magnetic) imaging contrast agent with a large Stokes shift.
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Affiliation(s)
- Elisa M N de Oliveira
- Multidisciplinary Center of Nanoscience and Micro-nanotechnology, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681., Porto Alegre-RS, CEP, 90619-900, Brazil
| | - Felipe L Coelho
- Applied Organic Photochemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500., Porto Alegre-RS, CEP, 90650-001, Brazil
| | - Mara L Zanini
- Multidisciplinary Center of Nanoscience and Micro-nanotechnology, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681., Porto Alegre-RS, CEP, 90619-900, Brazil
| | - Ricardo M Papaléo
- Multidisciplinary Center of Nanoscience and Micro-nanotechnology, Pontifícia Universidade Católica do Rio Grande do Sul, Av. Ipiranga 6681., Porto Alegre-RS, CEP, 90619-900, Brazil
| | - Leandra F Campo
- Applied Organic Photochemistry, Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500., Porto Alegre-RS, CEP, 90650-001, Brazil.
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Martin C, Bhattacharyya S, Patra A, Douhal A. Single and multistep energy transfer processes within doped polymer nanoparticles. Photochem Photobiol Sci 2015; 13:1241-52. [PMID: 24969364 DOI: 10.1039/c4pp00086b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Herein, we demonstrate the design of multiple fluorophores Coumarin 153 (C153) and Nile Red (NR) encapsulated in semiconducting poly[N-vinylcarbazole] (PVK) polymer nanoparticles (50-70 nm in diameter) by a simple re-precipitation technique, and elucidate their photophysical properties by steady-state and picosecond (ps) time resolved emission spectroscopy. It is interesting to note that multistep cascaded energy transfer occurs from the excited host PVK molecules to NR dye molecules through C153. The energy transfer time constants are found to be 180 ps for PVK→C153, 360 ps for PVK→NR, and 140 ps for the overall energy transfer process from PVK to NR through C153 dye molecules. The multistep energy transfer allows tuning of the wide range emission from 350 nm to 700 nm by changing the relative concentrations of the encapsulated dye molecules. Bright, stable, and white light emission of the dye doped polymer nanoparticles with a quantum yield of 14% is achieved at a particular concentration ratio of the C153 : NR dye. The generation of "cool" white emission in suspension and in the solid state film opens up new possibilities to obtain white light OLEDs based on single nanoparticles.
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Affiliation(s)
- Cristina Martin
- Departamento de Química Física, Facultad de Ciencias del Medio Ambiente y Bioquímica e INAMOL, Universidad de Castilla-La Mancha, Avda. Carlos III, S.N., 45071 Toledo, Spain.
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Higgins DA, Park SC, Tran-Ba KH, Ito T. Single-Molecule Investigations of Morphology and Mass Transport Dynamics in Nanostructured Materials. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2015; 8:193-216. [PMID: 26132347 DOI: 10.1146/annurev-anchem-071114-040153] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanostructured materials such as mesoporous metal oxides and phase-separated block copolymers form the basis for new monolith, membrane, and thin film technologies having applications in energy storage, chemical catalysis, and separations. Mass transport plays an integral role in governing the application-specific performance characteristics of many such materials. The majority of methods employed in their characterization provide only ensemble data, often masking the nanoscale, molecular-level details of materials morphology and mass transport. Single-molecule fluorescence methods offer direct routes to probing these characteristics on a single-molecule/single-nanostructure basis. This article provides a review of single-molecule studies focused on measurements of anisotropic diffusion, adsorption, partitioning, and confinement in nanostructured materials. Experimental methods covered include confocal and wide-field fluorescence microscopy. The results obtained promise to deepen our understanding of mass transport mechanisms in nanostructures, thus aiding in the realization of advanced materials systems.
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Affiliation(s)
- Daniel A Higgins
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506-0401; ,
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Douhal A, Alarcos N, Cohen B. Photodynamics of a Proton-Transfer Dye in Solutions and Confined Within NaX and NaY Zeolites. J Phys Chem B 2014; 118:19431-19443. [PMID: 25060093 DOI: 10.1021/jp505591k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on steady-state, picosecond and femtosecond time-resolved emission studies of 2-(2'-hydroxyphenyl)benzoxazole (HBO) in solutions and interacting with NaX and NaY zeolites. In solutions, an ultrafast (less than 150 fs) excited-state intramolecular proton-transfer (ESIPT) reaction takes place in syn-enol form, and leads to keto-type tautomer. We also observed a torsional motion in the keto form (~20 ps in dichloromethane, DCM). For NaX and NaY DCM suspensions, anionic forms interacting with the zeolites at S0 and S1 states are generated. They show two fluorescence lifetimes in both zeolites (720 ps and 2.4 ns for NaY and 960 ps and 2.7 ns for NaX), while those of the enol bonded to the zeolite framework and of the free keto forms are ~100 and 250 ps, respectively. The ultrafast dynamics of the anion in alkaline solutions reveals two deactivation pathways: an intramolecular charge transfer (ICT, 1.2 ps) and a twisting motion, affected by the viscosity of the solvent (12 and 20 ps for MeOH and ethylene glycol). When HBO is interacting with NaX and NaY the twisting motion is cancelled, while the ICT becomes slower as a result of a combination of several environment effects. HBO anions within the faujasite framework show also a ~ 30 ps decay associated to a non-fluorescent (n, π*) state. Our results demonstrate how intermolecular H-bonds, the confinement and the electrostatic interactions of HBO with the used materials, affect its ground as well as its excited state properties. Our findings add new knowledge on the interactions of silica-based nanomaterials containing the H-bonding guests.
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Zhu W, Wang C, Wang H, Li G. Theory and simulation of diffusion–adsorption into a molecularly imprinted mesoporous film and its nanostructured counterparts. Experimental application for trace explosive detection. RSC Adv 2014. [DOI: 10.1039/c4ra07000c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
To understand the diffusion–adsorption of small gas molecules in molecularly imprinted porous (MIP) systems, two general and suitable physicomathematical models have been developed for the molecularly imprinted mesoporous film and its nanostructured counterparts.
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Affiliation(s)
- Wei Zhu
- Key Lab of Organic Optoelectronics
- Molecular Engineering Department of Chemistry
- Tsinghua University
- Beijing, China
| | - Chen Wang
- Key Lab of Organic Optoelectronics
- Molecular Engineering Department of Chemistry
- Tsinghua University
- Beijing, China
| | - Hui Wang
- Key Lab of Organic Optoelectronics
- Molecular Engineering Department of Chemistry
- Tsinghua University
- Beijing, China
| | - Guangtao Li
- Key Lab of Organic Optoelectronics
- Molecular Engineering Department of Chemistry
- Tsinghua University
- Beijing, China
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Miletto I, Massa A, Ugazio E, Musso G, Caputo G, Berlier G. The protective effect of the mesoporous host on the photo oxidation of fluorescent guests: a UV-Vis spectroscopy study. Phys Chem Chem Phys 2014; 16:12172-7. [DOI: 10.1039/c4cp01143k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The inclusion of fluorescent molecules within the pores of an inorganic host system ensures an outstanding improvement of stability against photo oxidation under different experimental conditions.
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Affiliation(s)
- Ivana Miletto
- Università degli Studi di Torino
- Dipartimento di Chimica
- 10125 Torino, Italy
- NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre
- Università degli Studi di Torino
| | - Annalisa Massa
- Università degli Studi di Torino
- Dipartimento di Scienza e Tecnologia del Farmaco
- 10125 Torino, Italy
| | - Elena Ugazio
- Università degli Studi di Torino
- Dipartimento di Scienza e Tecnologia del Farmaco
- 10125 Torino, Italy
| | - Giorgia Musso
- Università degli Studi di Torino
- Dipartimento di Chimica
- 10125 Torino, Italy
- NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre
- Università degli Studi di Torino
| | - Giuseppe Caputo
- NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre
- Università degli Studi di Torino
- 10125 Torino, Italy
- Cyanine Technologies S.p.A
- 10036 Settimo Torinese, Italy
| | - Gloria Berlier
- Università degli Studi di Torino
- Dipartimento di Chimica
- 10125 Torino, Italy
- NIS (Nanostructured Interfaces and Surfaces) Interdepartmental Centre
- Università degli Studi di Torino
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Ninan N, Muthiah M, Park IK, Elain A, Wong TW, Thomas S, Grohens Y. Faujasites incorporated tissue engineering scaffolds for wound healing: in vitro and in vivo analysis. ACS APPLIED MATERIALS & INTERFACES 2013; 5:11194-206. [PMID: 24102066 DOI: 10.1021/am403436y] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Exploring the possibility of using inorganic faujasites in tissue engineering scaffolds is a prospective approach in regenerative medicine. Novel gelatin/hyaluronic acid (HA)/faujasite porous scaffolds with low surface energy were fabricated by lyophilization. The pore size of gelatin/HA scaffold was 50-2000 μm, whereas it was greatly reduced to 10-250 μm after incorporation of 2.4% (w/w) of faujasites in polymer matrix, GH(2.4%). Micro computed tomography analysis showed that the porosity of GH(2.4%) was 90.6%. The summative effect was ideal for growth of dermal fibroblasts and cellular attachment. XRD analysis revealed that the embedded faujasites maintained their crystallinity in the polymer matrix even though they interacted with the polymers as indicated by FT-IR analysis. Coupling with effective reinforcement of faujasites, GH(2.4%) demonstrated compression modulus of 929 ± 7 Pa and glass transition temperature of 31 ± 0.05 °C. It exhibited controlled swelling and degradation, allowing sufficient space for tissue regrowth. The latter is further supported by capability of faujasites to provide efficient oxygen supply to fibroblast cells. GH(2.4%) showed a cell viability of 91 ± 8% on NIH 3T3 fibroblast cell lines. The in vivo studies on Sprague-Dawley rats revealed its ability to enhance wound healing by accelerating re-epithelization and collagen deposition. These findings indicated its potential as excellent wound dressing material.
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Affiliation(s)
- Neethu Ninan
- Laboratoire Ingénierie des Matériaux de Bretagne, Université de Bretagne Sud , BP 92116, 56321 Lorient Cedex, France
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Abstract
Nanoconfined liquids are of interest because of both their fundamental properties and their potential utility in an array of applications. The structure and dynamics of the liquid can be dramatically impacted by the geometrical constraints and the interactions with the interface. Understanding the molecular-level origins of these changes and how they are determined by the characteristics of the confining framework is the subject of ongoing experimental and theoretical studies. The progress and remaining challenges in these efforts are reviewed in the context of solvation dynamics and proton transfer reactions, processes that are strongly affected by nanoscale confinement.
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Affiliation(s)
- Ward H Thompson
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, USA.
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Sliwa M, Naumov P, Choi HJ, Nguyen QT, Debus B, Delbaere S, Ruckebusch C. Effects of a Self-Assembled Molecular Capsule on the Ultrafast Photodynamics of a Photochromic Salicylideneaniline Guest. Chemphyschem 2011; 12:1669-72. [DOI: 10.1002/cphc.201100232] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Indexed: 11/08/2022]
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15
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Ukmar T, Godec A, Planinšek O, Kaučič V, Mali G, Gaberšček M. The phase (trans)formation and physical state of a model drug in mesoscopic confinement. Phys Chem Chem Phys 2011; 13:16046-54. [DOI: 10.1039/c1cp20874h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Choi M, Kim C, Ok Jeon S, Soo Yook K, Yeob Lee J, Jang J. Synthesis of titania embedded silica hollow nanospheres via sonication mediated etching and re-deposition. Chem Commun (Camb) 2011; 47:7092-4. [DOI: 10.1039/c1cc11185j] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cohen B, Álvarez CM, Carmona NA, Organero JA, Douhal A. Single molecule photobehavior of a chromophore interacting with silica-based nanomaterials. Phys Chem Chem Phys 2011; 13:1819-26. [DOI: 10.1039/c0cp02240c] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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18
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De Cremer G, Sels BF, De Vos DE, Hofkens J, Roeffaers MBJ. Fluorescence micro(spectro)scopy as a tool to study catalytic materials in action. Chem Soc Rev 2010; 39:4703-17. [DOI: 10.1039/c0cs00047g] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liang Q, Guan B, Jiang M. A one-pot approach to coaxial hybrid nanotubes of calixarene/silica via self-assembly and sol–gel transition. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01530j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tachikawa T, Majima T. Single-molecule, single-particle fluorescence imaging of TiO2-based photocatalytic reactions. Chem Soc Rev 2010; 39:4802-19. [DOI: 10.1039/b919698f] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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