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Zhang X, Zhang T, Liu B, Zhang Y, Ji Z, Wang X. Effects of Biomimetic Micropatterned Surfaces on the Adhesion and Morphology of Cervical Cancer Cells. ACS OMEGA 2022; 7:19913-19919. [PMID: 35722016 PMCID: PMC9202008 DOI: 10.1021/acsomega.2c01703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
It has been demonstrated that micropatterned surfaces have an important influence on modulating cellular behavior. In recent years, with the rapid development of microfabrication techniques and in-depth study of nature, an increasing number of patterned structures imitating natural organisms have been successfully fabricated and widely evaluated. However, there are only a few reports about biomimetic patterned microstructures in biologically related fields. In our work, micropatterned polydimethylsiloxane (PDMS) was fabricated by mimicking the surface microstructures of natural Trifolium and Parthenocissus tricuspidata leaves using the template duplication method. The interactions between the two types of biomimetic micro-PDMS surfaces and two kinds of human cervical cancer cells (HeLa and SiHa) were investigated. HeLa and SiHa cells cultured on the two micropatterned PDMS samples exhibited more stretchable morphology, higher diffusion, and a much lower nuclear/cytoplasmic ratio than those cultured on flat PDMS surfaces, indicating a higher adhesion area of the cells. Both of the micro-PDMS substrates were found to induce significantly different morphological changes between HeLa and SiHa cells. This suggests that the micropatterned structure affects cell adhesion and morphology correlated with their surface geometric structure and roughness. The results reveal that biomimetic micropatterned surfaces from natural leaves significantly regulate the morphology and adhesion behavior of cervical cancer cells and are believed to be the new platforms for investigating the interaction between cells and substrates.
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Affiliation(s)
- Xiaohui Zhang
- School
of Stomatology, Key Laboratory of Oral Diseases of Gansu Province, Northwest Minzu University, Lanzhou 730000, China
| | - Ting Zhang
- School/Hospital
of Stomatology Lanzhou University, Lanzhou 730000, China
| | - Bin Liu
- School/Hospital
of Stomatology Lanzhou University, Lanzhou 730000, China
| | - Yun Zhang
- Lanzhou
Stomatology Hospital, Lanzhou 730000, China
| | - Zhongying Ji
- State
Key Laboratory of Solid Lubrication, , Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Yantai
Zhongke Research Institute of Advanced Materials and Green Chemical
Engineering, Yantai 264006, China
| | - Xiaolong Wang
- State
Key Laboratory of Solid Lubrication, , Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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2
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Wang X, Li H, Shan C, Pan B. Construction of model platforms to probe the confinement effect of nanocomposite-enabled water treatment. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2021.100229] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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3
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Davoodi E, Zhianmanesh M, Montazerian H, Milani AS, Hoorfar M. Nano-porous anodic alumina: fundamentals and applications in tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:60. [PMID: 32642974 DOI: 10.1007/s10856-020-06398-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
Recently, nanomaterials have been widely utilized in tissue engineering applications due to their unique properties such as the high surface to volume ratio and diversity of morphology and structure. However, most methods used for the fabrication of nanomaterials are rather complicated and costly. Among different nanomaterials, anodic aluminum oxide (AAO) is a great example of nanoporous structures that can easily be engineered by changing the electrolyte type, anodizing potential, current density, temperature, acid concentration and anodizing time. Nanoporous anodic alumina has often been used for mammalian cell culture, biofunctionalization, drug delivery, and biosensing by coating its surface with biocompatible materials. Despite its wide application in tissue engineering, thorough in vivo and in vitro studies of AAO are still required to enhance its biocompatibility and thereby pave the way for its application in tissue replacements. Recognizing this gap, this review article aims to highlight the biomedical potentials of AAO for applications in tissue replacements along with the mechanism of porous structure formation and pore characteristics in terms of fabrication parameters.
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Affiliation(s)
- Elham Davoodi
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.
| | - Masoud Zhianmanesh
- Department of Mechanical Engineering, Shahid Rajaee Teacher Training University, Shabanloo Street, Tehran, 16788, Iran
| | - Hossein Montazerian
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Abbas S Milani
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada
| | - Mina Hoorfar
- School of Engineering, University of British Columbia, Kelowna, BC, V1V 1V7, Canada.
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4
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Robust Fabrication of Polymeric Nanowire with Anodic Aluminum Oxide Templates. MICROMACHINES 2019; 11:mi11010046. [PMID: 31905961 PMCID: PMC7019737 DOI: 10.3390/mi11010046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/24/2019] [Accepted: 12/27/2019] [Indexed: 11/16/2022]
Abstract
Functionalization of a surface with biomimetic nano-/micro-scale roughness (wires) has attracted significant interests in surface science and engineering as well as has inspired many real-world applications including anti-fouling and superhydrophobic surfaces. Although methods relying on lithography include soft-lithography greatly increase our abilities in structuring hard surfaces with engineered nano-/micro-topologies mimicking real-world counterparts, such as lotus leaves, rose petals, and gecko toe pads, scalable tools enabling us to pattern polymeric substrates with the same structures are largely absent in literature. Here we present a robust and simple technique combining anodic aluminum oxide (AAO) templating and vacuum-assisted molding to fabricate nanowires over polymeric substrates. We have demonstrated the efficacy and robustness of the technique by successfully fabricating nanowires with large aspect ratios (>25) using several common soft materials including both cross-linking polymers and thermal plastics. Furthermore, a model is also developed to determine the length and molding time based on nanowires material properties (e.g., viscosity and interfacial tension) and operational parameters (e.g., pressure, vacuum, and AAO template dimension). Applying the technique, we have further demonstrated the confinement effects on polymeric crosslinking processes and shown substantial lengthening of the curing time.
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5
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Lastra ML, Molinuevo MS, Blaszczyk-Lezak I, Mijangos C, Cortizo MS. Nanostructured fumarate copolymer-chitosan crosslinked scaffold: An in vitro osteochondrogenesis regeneration study. J Biomed Mater Res A 2017; 106:570-579. [PMID: 28984066 DOI: 10.1002/jbm.a.36260] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/25/2017] [Accepted: 09/08/2017] [Indexed: 12/12/2022]
Abstract
In the tissue engineering field, the design of the scaffold inspired on the natural occurring tissue is of vital importance. Ideally, the scaffold surface must promote cell growth and differentiation, while promote angiogenesis in the in vivo implant of the scaffold. On the other hand, the material selection must be biocompatible and the degradation times should meet tissue reparation times. In the present work, we developed a nanofibrous scaffold based on chitosan crosslinked with diisopropylfumarate-vinyl acetate copolymer using anodized aluminum oxide (AAO) templates. We have previously demonstrated its biocompatibility properties with low cytotoxicity and proper degradation times. Now, we extended our studies to demonstrate that it can be successfully nanostructured using the AAO templates methodology, obtaining a nanorod-like scaffold with a diameter comparable to those of collagen fibers of the bone matrix (170 and 300 nm). The nanorods obtained presented a very homogeneous pattern in diameter and length, and supports cell attachment and growth. We also found that both osteoblastic and chondroblastic matrix production were promoted on bone marrow progenitor cells and primary condrocytes growing on the scaffolds, respectively. In addition, the nanostructured scaffold presented no cytotoxicity as it was evaluated using a model of macrophages on culture. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 570-579, 2018.
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Affiliation(s)
- María Laura Lastra
- Laboratorio de Investigación en Osteopatías y Metabolismo Mineral (LIOMM), Facultad de Ciencias Exactas, UNLP, 47 y 115, 1900, La Plata, Argentina.,Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, CC16 suc. 4, 1900, La Plata, Argentina
| | - María Silvina Molinuevo
- Laboratorio de Investigación en Osteopatías y Metabolismo Mineral (LIOMM), Facultad de Ciencias Exactas, UNLP, 47 y 115, 1900, La Plata, Argentina
| | - Iwona Blaszczyk-Lezak
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, Madrid, 28006, España
| | - Carmen Mijangos
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, Madrid, 28006, España
| | - María Susana Cortizo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, CC16 suc. 4, 1900, La Plata, Argentina
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Thöle F, Xue L, HEß C, Hillebrand R, Gorb SN, Steinhart M. Quantifying the structural integrity of nanorod arrays. J Microsc 2017; 265:222-231. [PMID: 28094864 DOI: 10.1111/jmi.12491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Revised: 08/23/2016] [Accepted: 09/18/2016] [Indexed: 11/28/2022]
Abstract
Arrays of aligned nanorods oriented perpendicular to a support, which are accessible by top-down lithography or by means of shape-defining hard templates, have received increasing interest as sensor components, components for nanophotonics and nanoelectronics, substrates for tissue engineering, surfaces having specific adhesive or antiadhesive properties and as surfaces with customized wettability. Agglomeration of the nanorods deteriorates the performance of components based on nanorod arrays. A comprehensive body of literature deals with mechanical failure mechanisms of nanorods and design criteria for mechanically stable nanorod arrays. However, the structural integrity of nanorod arrays is commonly evaluated only visually and qualitatively. We use real-space analysis of microscopic images to quantify the fraction of condensed nanorods in nanorod arrays. We suggest the number of array elements apparent in the micrographs divided by the number of array elements a defect-free array would contain in the same area, referred to as integrity fraction, as a measure of structural array integrity. Reproducible procedures to determine the imaged number of array elements are introduced. Thus, quantitative comparisons of different nanorod arrays, or of one nanorod array at different stages of its use, are possible. Structural integrities of identical nanorod arrays differing only in the length of the nanorods are exemplarily analysed.
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Affiliation(s)
- Florian Thöle
- Institut für Chemie neuer Materialien der Universität Osnabrück, Barbarastr. 7, 49069, Osnabrück, Germany
| | - Longjian Xue
- School of Power and Mechanical Engineering, Wuhan University, South Donghu Road 8, Wuhan, Wuchang, 430072, Hubei, China
| | - Claudia HEß
- Institut für Chemie neuer Materialien der Universität Osnabrück, Barbarastr. 7, 49069, Osnabrück, Germany
| | - Reinald Hillebrand
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120, Halle, Germany
| | - Stanislav N Gorb
- Functional Morphology and Biomechanics, Zoological Institute, Kiel University, Am Botanischen Garten 9, 24118, Kiel, Germany
| | - Martin Steinhart
- Institut für Chemie neuer Materialien der Universität Osnabrück, Barbarastr. 7, 49069, Osnabrück, Germany
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7
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8
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Newland B, Thomas L, Zheng Y, Steinhart M, Werner C, Wang W. Preparation, loading, and cytotoxicity analysis of polymer nanotubes from an ethylene glycol dimethacrylate homopolymer in comparison to multi-walled carbon nanotubes. ACTA ACUST UNITED AC 2016; 1:9-18. [PMID: 27512602 PMCID: PMC4959090 DOI: 10.1002/jin2.7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/03/2015] [Accepted: 12/09/2015] [Indexed: 12/02/2022]
Abstract
Despite concerns over toxicity, carbon nanotubes have been extensively investigated for potential applications in nanomedicine because of their small size, unique properties, and ability to carry cargo such as small molecules and nucleic acids. Herein, we show that polymer nanotubes can be synthesized quickly and easily from a homopolymer of ethylene glycol dimethacrylate (EGDMA). The nanotubes formed via photo‐initiated polymerization of the highly functional prepolymer, inside an anodized aluminium oxide template, have a regular structure and large internal pore and can be loaded with a fluorescent dye within minutes representing a simple alternative to multi‐walled carbon nanotubes for biomedical applications.
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Affiliation(s)
- Ben Newland
- Leibniz-Institut für Polymerforschung Dresden Germany; Brain Repair Group, School of Biosciences Cardiff University Cardiff UK
| | | | - Yu Zheng
- The Charles Institute of Dermatology, School of Medicine and Medical Science University College Dublin Dublin Ireland
| | - Martin Steinhart
- Institut für Chemie neuer Materialien, Universität Osnabrück Barbarastraße 7 Osnabrück 49069 Germany
| | | | - Wenxin Wang
- The Charles Institute of Dermatology, School of Medicine and Medical Science University College Dublin Dublin Ireland; School of Materials Science and Engineering Tianjin University Tianjin China
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9
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Mijangos C, Hernández R, Martín J. A review on the progress of polymer nanostructures with modulated morphologies and properties, using nanoporous AAO templates. Prog Polym Sci 2016. [DOI: 10.1016/j.progpolymsci.2015.10.003] [Citation(s) in RCA: 124] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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10
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Mi C, Zhou J, Ren Z, Li H, Sun X, Yan S. The phase transition behavior of poly(butylene adipate) in the nanoporous anodic alumina oxide. Polym Chem 2016. [DOI: 10.1039/c5py01532d] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PBA nanotubes with different diameters have been prepared.
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Affiliation(s)
- Ce Mi
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jiandong Zhou
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Zhongjie Ren
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Huihui Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering
- Beijing University of Chemical Technology
- Beijing 100029
- China
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11
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Sanz B, Palmero EM, P. del Real R, Vázquez M, Mijangos C. Arrays of Magnetic Ni Nanowires Grown Inside Polystyrene Nanotubes. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b02860] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Belén Sanz
- Instituto de Ciencia
y Tecnología de Polímeros, ICTP, CSIC, 28006, Madrid, Spain
| | - Ester M. Palmero
- Instituto de Ciencia
de Materiales de Madrid, ICMM, CSIC, 28049, Madrid, Spain
| | - Rafael P. del Real
- Instituto de Ciencia
de Materiales de Madrid, ICMM, CSIC, 28049, Madrid, Spain
| | - Manuel Vázquez
- Instituto de Ciencia
de Materiales de Madrid, ICMM, CSIC, 28049, Madrid, Spain
| | - Carmen Mijangos
- Instituto de Ciencia
y Tecnología de Polímeros, ICTP, CSIC, 28006, Madrid, Spain
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12
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Lastra ML, Molinuevo MS, Giussi JM, Allegretti PE, Blaszczyk-Lezak I, Mijangos C, Cortizo MS. Tautomerizable β-ketonitrile copolymers for bone tissue engineering: Studies of biocompatibility and cytotoxicity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 51:256-62. [PMID: 25842133 DOI: 10.1016/j.msec.2015.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 02/02/2015] [Accepted: 03/09/2015] [Indexed: 01/10/2023]
Abstract
β-Ketonitrile tautomeric copolymers have demonstrated tunable hydrophilicity/hydrophobicity properties according to surrounding environment, and mechanical properties similar to those of human bone tissue. Both characteristic properties make them promising candidates as biomaterials for bone tissue engineering. Based on this knowledge we have designed two scaffolds based on β-ketonitrile tautomeric copolymers which differ in chemical composition and surface morphology. Two of them were nanostructured, using an anodized aluminum oxide (AAO) template, and the other two obtained by solvent casting methodology. They were used to evaluate the effect of the composition and their structural modifications on the biocompatibility, cytotoxicity and degradation properties. Our results showed that the nanostructured scaffolds exhibited higher degradation rate by macrophages than casted scaffolds (6 and 2.5% of degradation for nanostructured and casted scaffolds, respectively), a degradation rate compatible with bone regeneration times. We also demonstrated that the β-ketonitrile tautomeric based scaffolds supported osteoblastic cell proliferation and differentiation without cytotoxic effects, suggesting that these biomaterials could be useful in the bone tissue engineering field.
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Affiliation(s)
- M Laura Lastra
- Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral (LIOMM), Facultad de Ciencias Exactas, UNLP (1900), 47 y 115, 1900 La Plata, Argentina
| | - M Silvina Molinuevo
- Laboratorio de Investigaciones en Osteopatías y Metabolismo Mineral (LIOMM), Facultad de Ciencias Exactas, UNLP (1900), 47 y 115, 1900 La Plata, Argentina.
| | - Juan M Giussi
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, CC16 suc. 4, 1900 La Plata, Argentina; Laboratorio de Estudio de Compuestos Orgánicos (LADECOR), Facultad de Ciencias Exactas, UNLP, 47 y 115, 1900 La Plata, Argentina
| | - Patricia E Allegretti
- Laboratorio de Estudio de Compuestos Orgánicos (LADECOR), Facultad de Ciencias Exactas, UNLP, 47 y 115, 1900 La Plata, Argentina
| | - Iwona Blaszczyk-Lezak
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Carmen Mijangos
- Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - M Susana Cortizo
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CCT-La Plata, CC16 suc. 4, 1900 La Plata, Argentina.
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13
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Reid DK, Alves Freire M, Yao H, Sue HJ, Lutkenhaus JL. The Effect of Surface Chemistry on the Glass Transition of Polycarbonate Inside Cylindrical Nanopores. ACS Macro Lett 2015; 4:151-154. [PMID: 35596426 DOI: 10.1021/mz500725s] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The effect of surface chemistry on the glass transition of polycarbonate (PC) inside cylindrical nanopores is studied. Polycarbonate is melt-wetted into nanoporous anodic aluminum oxide (AAO) treated with hydrophobic alkyl- and fluorosilanes of varying length. The curvature observed at the nanowire tips is consistent with a contact angle descriptive of polycarbonate-AAO surface interactions. Differential scanning calorimetry (DSC) thermograms reveal a distinct broadening of the Tg that is related to the motion of polymer chains at the nanopore wall as well as at the core. DSC and thermal gravimetric analysis (TGA) show that polycarbonate infiltrated into a naked AAO template (without silane treatment) degrades upon heating, suggestive of a surface-catalyzed degradation mechanism. It is further shown that silane treatment largely prevents PC thermal degradation.
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Affiliation(s)
| | - Marcela Alves Freire
- Universidade Federal de Minas Gerais, Pampulha,
Belo Horizonte, MG 31270-901, Brazil
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14
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Zustiak SP. The role of matrix compliance on cell responses to drugs and toxins: towards predictive drug screening platforms. Macromol Biosci 2015; 15:589-99. [PMID: 25654999 DOI: 10.1002/mabi.201400507] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/06/2015] [Indexed: 12/26/2022]
Abstract
Since the birth of tissue engineering, it has been redefined to include not only the development of tissues for clinical use, but also in vitro models for the study of tissue physiology and pathology. Great strides have been accomplished in the design of in vitro tissue models, yet one area in which they are underrepresented, but where they can have an immediate impact, is the development of platforms for drug screening. By providing more in vivo-like cell environments, such models could address the growing concerns about drug failures due to lack of efficacy or unexpected side effects. This review aims to address the interface between substrate compliance and cell responsiveness to toxins and drugs since compliance has been established as a major determinate of overall cell fate. Here, results from 2D substrates and 3D matrices are discussed. Additionally, examples of biomaterial-based high-throughput stiffness assays in drug screening are presented.
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Affiliation(s)
- Silviya Petrova Zustiak
- Biomedical Engineering Department, Saint Louis University, Parks College of Engineering, Aviation and Technology, 3507 Lindell Blvd., St. Louis, Missouri, 63103, USA.
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15
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Ali S, Tian W, Ali N, Shi L, Kong J, Ali N. Polymer melt flow through nanochannels: from theory and fabrication to application. RSC Adv 2015. [DOI: 10.1039/c4ra14787a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
This short review presents the theory, fabrication, and application of polymer melts through nanochannels.
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Affiliation(s)
- Sarmad Ali
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Wei Tian
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Nisar Ali
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Lingxiao Shi
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Jie Kong
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
| | - Nazakat Ali
- MOE Key Laboratory of Space Applied Physics and Chemistry
- Shaanxi Key Laboratory of Macromolecular Science and Technology
- School of Science
- Northwestern Polytechnical University
- Xi'an
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16
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17
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Giussi JM, Blaszczyk-Lezak I, Cortizo MS, Mijangos C. In-situ polymerization of styrene in AAO nanocavities. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.10.045] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Giussi JM, Blaszczyk-Lezak I, Allegretti PE, Cortizo MS, Mijangos C. Tautomerizable styrenic copolymers confined in AAO templates. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Buijnsters JG, Zhong R, Tsyntsaru N, Celis JP. Surface wettability of macroporous anodized aluminum oxide. ACS APPLIED MATERIALS & INTERFACES 2013; 5:3224-3233. [PMID: 23506401 DOI: 10.1021/am4001425] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The correlation between the structural characteristics and the wetting of anodized aluminum oxide (AAO) surfaces with large pore sizes (>100 nm) is discussed. The roughness-induced wettability is systematically examined for oxide films grown by a two-step, high-field anodization in phosphoric acid of three different concentrations using a commercial aluminum alloy. This is done for the as-synthesized AAO layers, after various degrees of pore widening by a wet chemical etching in phosphoric acid solution, and upon surface modification by either Lauric acid or a silane. The as-grown AAO films feature structurally disordered pore architectures with average pore openings in the range 140-190 nm but with similar interpore distances of about 405 nm. The formation of such AAO structures induces a transition from slightly hydrophilic to moderately hydrophobic surfaces up to film thicknesses of about 6 μm. Increased hydrophobicity is obtained by pore opening and a maximum value of the water contact angle (WCA) of about 128° is measured for AAO arrays with a surface porosity close to 60%. Higher surface porosity by prolonged wet chemical etching leads to a rapid decrease in the WCA as a result of the limited pore wall thickness and partial collapse of the dead-end pore structures. Modification of the AAO surfaces by Lauric acid results in 5-30° higher WCA's, whereas near-superhydrophobicity (WCA ~146°) is realized through silane coating. The "rose petal effect" of strongly hydrophobic wetting with high adhesive force on the produced AAO surfaces is explained by a partial penetration of water through capillary action into the dead-end pore cavities which leads to a wetting state in-between the Wenzel and Cassie states. Moreover, practical guidelines for the synthesis of rough, highly porous AAO structures with controlled wettability are provided and the possibility of forming superhydrophobic surfaces is evaluated.
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Affiliation(s)
- Josephus G Buijnsters
- Department of Metallurgy and Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium.
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Wesche M, Hüske M, Yakushenko A, Brüggemann D, Mayer D, Offenhäusser A, Wolfrum B. A nanoporous alumina microelectrode array for functional cell-chip coupling. NANOTECHNOLOGY 2012; 23:495303. [PMID: 23150042 DOI: 10.1088/0957-4484/23/49/495303] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The design of electrode interfaces has a strong impact on cell-based bioelectronic applications. We present a new type of microelectrode array chip featuring a nanoporous alumina interface. The chip is fabricated in a combination of top-down and bottom-up processes using state-of-the-art clean room technology and self-assembled generation of nanopores by aluminum anodization. The electrode characteristics are investigated in phosphate buffered saline as well as under cell culture conditions. We show that the modified microelectrodes exhibit decreased impedance compared to planar microelectrodes, which is caused by a nanostructuring effect of the underlying gold during anodization. The stability and biocompatibility of the device are demonstrated by measuring action potentials from cardiomyocyte-like cells growing on top of the chip. Cross sections of the cell-surface interface reveal that the cell membrane seals the nanoporous alumina layer without bending into the sub-50 nm apertures. The nanoporous microelectrode array device may be used as a platform for combining extracellular recording of cell activity with stimulating topographical cues.
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Affiliation(s)
- Manuel Wesche
- Institute of Bioelectronics (PGI-8/ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, D-52425 Jülich, Germany
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Du K, Gan Z. Cellular interactions on hierarchical poly(ε-caprolactone) nanowire micropatterns. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4643-4650. [PMID: 22873768 DOI: 10.1021/am301013e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A double template method to fabricate poly(ε-caprolactone) (PCL) hierarchical patterned nanowires with highly ordered nano- and microscaled topography was developed in this study. The topography of PCL film with a patterned nanowire surface can be easily and well controlled by changing the template and melting time of PCL film on the templates. The surface morphology, water contact angle, protein adsorption, and cell growth behavior on the PCL films with different surface structures were well studied. The results revealed that the PCL nanowire arrays and the hierarchical patterned nanowires showed higher capability of protein adsorption and better cell growth than the PCL film with smooth surface. Typically, the PCL surface with hierarchical nanowire patterns was most favorable for cell attachment and proliferation. The present study was innovative at fabrication of polymer substrates with hierarchical architecture of nanowires inside microscaled islands to gain insight into the cell response to this unique topography and to develop a new method of constructing the bionic surface for tissue engineering applications.
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Affiliation(s)
- Ke Du
- The CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
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Martín J, Martín-González M. The use of PEEK nanorod arrays for the fabrication of nanoporous surfaces under high temperature: SiNx example. NANOSCALE 2012; 4:5608-5613. [PMID: 22854871 DOI: 10.1039/c2nr30885a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Large area silicon nitride (SiN(x)) nanoporous surfaces are fabricated using poly(ether-ether-ketone) (PEEK) nanorod arrays as a template. The procedure involves manipulation of nanoporous anodic aluminum oxide (AAO) templates in order to form an ordered array of PEEK nanopillars with high temperature resistant characteristics. In this context, self-ordered AAO templates are infiltrated with PEEK melts via the "precursor film" method. Once the melts have been crystallized in the porous structure of AAO, the basis alumina layer is removed, yielding an ordered array of PEEK nanopillars. The resulting structure is a high temperature and chemical resistant polymeric nanomold, which can be utilized in the synthesis of nanoporous materials under aggressive conditions. Such conditions are high temperatures (up to 320 °C), vacuum, or extreme pH. For example, SiN(x) nanopore arrays have been grown by plasma enhanced chemical vapor deposition at 300 °C, which can be of interest as mold for nanoimprint lithography, due to its hardness and low surface energy. The SiN(x) nanopore array portrays the same characteristics as the original AAO template: 120 nm diameter pores and an interpore distance of 430 nm. Furthermore, the aspect ratio of the SiN(x) nanopores can be tuned by selecting an AAO template with appropriate conditions. The use of PEEK as a nanotemplate extends the applicability of polymeric nanopatterns into a temperature regime up to now not accessible and opens up the simple fabrication of novel nanoporous inorganic surfaces.
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Affiliation(s)
- Jaime Martín
- Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, E-28760, Madrid, Spain
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Hoess A, Thormann A, Friedmann A, Heilmann A. Self-supporting nanoporous alumina membranes as substrates for hepatic cell cultures. J Biomed Mater Res A 2012; 100:2230-8. [PMID: 22492687 DOI: 10.1002/jbm.a.34158] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 02/26/2012] [Accepted: 02/28/2012] [Indexed: 11/10/2022]
Abstract
Membranes made from nanoporous alumina exhibit interesting properties for their use in biomedical research. They show high porosity and the pore diameters can be easily adjusted in a reproducible manner. Nanoporous alumina membranes are thus ideal substrates for the cultivation of polar cells (e.g., hepatocytes) or the establishment of indirect co-cultures. The porous nature of the material allows supply of nutrients to both sides of adherent cells and the exchange of molecules across the membrane. However, it is well-known that surface features in the nanometer range affect cellular behavior. In this study, the response of HepG2 cells to nanoporous alumina membranes with three different pore diameters, ranging from 50 to 250 nm, has been evaluated. The cellular interactions with the nanoporous materials were assessed by investigating cell adhesion, morphology, and proliferation. Cell functionality was measured by means of albumin production. The membranes supported good cell adhesion and spreading. Compared to tissue culture plastic, the cells on the porous substrates developed distinct focal adhesion sites and actin stress fibers. Additionally, electron microscopical investigations revealed the penetration of cellular extensions into pores with diameters bigger than 200 nm. Furthermore, cell proliferation significantly increased with an increase in pore diameter, whereas the albumin production followed a reverse trend. Thus, it seems to be possible to direct cellular behavior of HepG2 cells growing on nanoporous alumina by changing the pore diameter of the material. Hence, nanoporous alumina membranes can be useful culture substrates to develop new approaches in the field of liver tissue engineering.
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Affiliation(s)
- Andreas Hoess
- Department of Engineering Sciences, Applied Materials Science, Uppsala University, Uppsala, Sweden.
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24
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Tailored polymer-based nanorods and nanotubes by "template synthesis": From preparation to applications. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.01.028] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Li J, Zhou C, Jin X, Piao W, Gao X. Controlled nanoscale diffusion-limited chemical etching for releasing polystyrene nanocones from recyclable alumina templates. Chem Commun (Camb) 2012; 48:11322-4. [DOI: 10.1039/c2cc35463b] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Feng X, Mei S, Jin Z. Wettability transition induced transformation and entrapment of polymer nanostructures in cylindrical nanopores. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:14240-14247. [PMID: 22004408 DOI: 10.1021/la2030632] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We apply the concept of wettability transition to manipulate the morphology and entrapment of polymer nanostructures inside cylindrical nanopores of anodic aluminum oxide (AAO) membranes. When AAO/polystyrene (PS) hybrids, i.e., AAO/PS nanorods or AAO/PS nanotubes, are immersed into a polyethylene glycol (PEG) reservoir above the glass transition temperature of PS, a wettability transition from wetting to nonwetting of PS can be triggered due to the invasion of the more wettable PEG melt. The wettability transition enables us to develop a nondestructive method to entrap hemispherically capped nanorods inside nanopores. Moreover, we can obtain single nanorods with the desired aspect ratio by further dissolving the AAO template, in contrast to the drawbacks of nonuniformity or destructiveness from the conventional ultrasonication method. In the case of AAO/PS nanotubes, the wettability transition induced dewetting of PS nanotube walls results in the disconnection and entrapment of nonwetting PS domains (i.e., nanospheres, nanocapsules, or capped nanorods). Moreover, PEG is then washed to recover the pristine wettability of PS on the alumina surface; further annealing of the PS nanospheres inside AAO nanopores under vacuum can generate some unique nanostructures, particularly semicylindrical nanorods.
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Affiliation(s)
- Xunda Feng
- Department of Chemistry, Renmin University of China, Beijing 100872, China
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Blaszczyk-Lezak I, Maiz J, Sacristán J, Mijangos C. Monitoring the Thermal Elimination of Infiltrated Polymer from AAO Templates: An Exhaustive Characterization after Polymer Extraction. Ind Eng Chem Res 2011. [DOI: 10.1021/ie200826x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Iwona Blaszczyk-Lezak
- Instituto de Ciencia y Tecnología de Polimeros, CSIC c/Juan de la Cierva 3, Madrid 28006, Spain
| | - Jon Maiz
- Instituto de Ciencia y Tecnología de Polimeros, CSIC c/Juan de la Cierva 3, Madrid 28006, Spain
| | - Javier Sacristán
- Instituto de Ciencia y Tecnología de Polimeros, CSIC c/Juan de la Cierva 3, Madrid 28006, Spain
| | - Carmen Mijangos
- Instituto de Ciencia y Tecnología de Polimeros, CSIC c/Juan de la Cierva 3, Madrid 28006, Spain
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Ingham CJ, ter Maat J, de Vos WM. Where bio meets nano: the many uses for nanoporous aluminum oxide in biotechnology. Biotechnol Adv 2011; 30:1089-99. [PMID: 21856400 DOI: 10.1016/j.biotechadv.2011.08.005] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 07/28/2011] [Accepted: 08/03/2011] [Indexed: 01/17/2023]
Abstract
Porous aluminum oxide (PAO) is a ceramic formed by an anodization process of pure aluminum that enables the controllable assembly of exceptionally dense and regular nanopores in a planar membrane. As a consequence, PAO has a high porosity, nanopores with high aspect ratio, biocompatibility and the potential for high sensitivity imaging and diverse surface modifications. These properties have made this unusual material attractive to a disparate set of applications. This review examines how the structure and properties of PAO connect with its present and potential uses within research and biotechnology. The role of PAO is covered in areas including microbiology, mammalian cell culture, sensitive detection methods, microarrays and other molecular assays, and in creating new nanostructures with further uses within biology.
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29
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Chen B, Lu K. Moiré pattern nanopore and nanorod arrays by focused ion beam guided anodization and nanoimprint molding. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:4117-4125. [PMID: 21401046 DOI: 10.1021/la105066e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nanoporous anodic aluminum oxide has been intensively studied as templates in the fabrication of various nanomaterials. Most of the research focuses on highly ordered hexagonal nanopore arrangement with homogeneous area-specific pore density. Anodic aluminum oxide with alternating area-specific nanopore densities has seldom been addressed. In this study, focused ion beam patterned concave arrays created by overlapping two periodic patterns show the exceptional ability of guiding the subsequent anodization and fabricating porous anodic aluminum oxide with Moiré patterns, which have a wide range of interpore distances and area-specific pore densities. The periodicity of the Moiré patterns can be predicted by the interpore distance of the initial patterns and the rotation angle. The depth of the nanopores of these Moiré patterns is around 1 μm. Vertically aligned and high aspect ratio h-PDMS nanorod arrays with Moiré pattern arrangements have been successfully synthesized using the patterned porous anodic aluminum oxide as templates.
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Affiliation(s)
- Bo Chen
- Department of Materials Science and Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, United States
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