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Sha Y, Zhao C, Zhuang W, Chen J, Liu D, Chen Y, Ge L, Wu J, Zhu C, Liu J, Ying H. Reversible Adsorption and Detachment of Saccharomyces cerevisiae on Thermoresponsive Poly( N-isopropylacrylamide)-Grafted Fibers for Continuous Immobilized Fermentation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:15827-15838. [PMID: 36484487 DOI: 10.1021/acs.langmuir.2c02758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Biofilm-mediated continuous fermentation with cells immobilized has gained much attention in recent years. In this study, thermoresponsive poly(N-isopropylacrylamide)-grafted cotton fibers (PNIPAM-CF) were prepared via an improved surface-initiated atom transfer radical polymerization. The modification process imparted switchable wettability to the surface while maintaining the thermal stability and biocompatibility of the CF. During the ethanol transformation, the rapid, reversible cell adsorption and detachment of Saccharomyces cerevisiae were performed through the modulation of wettability, displaying the enhancement of immobilized biomass and immobilization efficiency from 2.20 g/L and 59.43% to 2.81 g/L and 93.32%, respectively. Moreover, the biofilm adsorption matched well with the Freundlich model, indicating that multilayer adhesion was the main mode of biofilm formation. Based on the accumulation of the biofilm, the fabrication and utilization of PNIPAM-CF improved the efficiency of continuous immobilized fermentation, making the ethanol production reach 26.34 g/L in the sixth batch of fermentation. Meanwhile, wettability regulation further enhanced the reusability of the carrier. Therefore, the findings of this study revealed that the application of smart materials in cell immobilization systems had broad prospects for achieving sustainable and continuous catalysis.
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Affiliation(s)
- Yu Sha
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Chenchen Zhao
- School of Chemistry and Molecular Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Wei Zhuang
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Technique Research Center for Biotechnology, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Jiale Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Dong Liu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Yong Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Technique Research Center for Biotechnology, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Lei Ge
- Centre for Future Materials, University of Southern Queensland, Springfield Central, QLD4300, Australia
| | - Jinglan Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Chenjie Zhu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Technique Research Center for Biotechnology, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
| | - Jinle Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou450001, China
| | - Hanjie Ying
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
- State Key Laboratory of Materials-Oriented Chemical Engineering, National Engineering Technique Research Center for Biotechnology, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing211816, China
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2
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Drewry M, Dailey MT, Rothermund K, Backman C, Dahl KN, Syed-Picard FN. Promoting and Orienting Axon Extension Using Scaffold-Free Dental Pulp Stem Cell Sheets. ACS Biomater Sci Eng 2022; 8:814-825. [PMID: 34982537 PMCID: PMC9821555 DOI: 10.1021/acsbiomaterials.1c01517] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Current treatments of facial nerve injury result in poor functional outcomes due to slow and inefficient axon regeneration and aberrant reinnervation. To address these clinical challenges, bioactive scaffold-free cell sheets were engineered using neurotrophic dental pulp stem/progenitor cells (DPCs) and their aligned extracellular matrix (ECM). DPCs endogenously supply high levels of neurotrophic factors (NTFs), growth factors capable of stimulating axonal regeneration, and an aligned ECM provides guidance cues to direct axon extension. Human DPCs were grown on a substrate comprising parallel microgrooves, inducing the cells to align and deposit a linearly aligned, collagenous ECM. The resulting cell sheets were robust and could be easily removed from the underlying substrate. DPC sheets produced NTFs at levels previously shown capable of promoting axon regeneration, and, moreover, inducing DPC alignment increased the expression of select NTFs relative to unaligned controls. Furthermore, the aligned DPC sheets were able to stimulate functional neuritogenic effects in neuron-like cells in vitro. Neuronally differentiated neuroblastoma SH-SY5Y cells produced neurites that were significantly more oriented and less branched when cultured on aligned cell sheets relative to unaligned sheets. These data demonstrate that the linearly aligned DPC sheets can biomechanically support axon regeneration and improve axonal guidance which, when applied to a facial nerve injury, will result in more accurate reinnervation. The aligned DPC sheets generated here could be used in combination with commercially available nerve conduits to enhance their bioactivity or be formed into stand-alone scaffold-free nerve conduits capable of facilitating improved facial nerve recovery.
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Affiliation(s)
- Michelle
D. Drewry
- Department
of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
| | - Matthew T. Dailey
- Department
of Oral and Maxillofacial Surgery, School of Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
| | - Kristi Rothermund
- Department
of Oral Biology and Center for Craniofacial Regeneration, School of
Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
| | - Charles Backman
- Department
of Chemical Engineering, College of Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Kris N. Dahl
- Department
of Chemical Engineering, College of Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States,Department
of Biomedical Engineering, College of Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States,McGowan
Institute for Regenerative Medicine, Pittsburgh, Pennsylvania 15219, United States,Forensics, Thornton Tomasetti, New York, New York 10271, United States
| | - Fatima N. Syed-Picard
- Department
of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States,Department
of Oral Biology and Center for Craniofacial Regeneration, School of
Dental Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States,McGowan
Institute for Regenerative Medicine, Pittsburgh, Pennsylvania 15219, United States,. Phone: 412-648-8824
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3
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Chen PJ, Chen HY, Tsai WB. Fabrication of Low-Fouling Surfaces on Alkyne-Functionalized Poly-(p-xylylenes) Using Click Chemistry. Polymers (Basel) 2022; 14:polym14020225. [PMID: 35054631 PMCID: PMC8780154 DOI: 10.3390/polym14020225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/22/2021] [Accepted: 12/31/2021] [Indexed: 02/04/2023] Open
Abstract
A facial, versatile, and universal method that breaks the substrate limits is desirable for antifouling treatment. Thin films of functional poly-p-xylylenes (PPX) that are deposited using chemical vapor deposition (CVD) provide a powerful platform for surface immobilization of molecules. In this study, we prepared an alkyne-functionalized PPX coating on which poly (sulfobetaine methacrylate-co-Az) could be conjugated via click chemistry. We found that the conjugated polymers were very stable and inhibited cell adhesion and protein adsorption effectively. The same conjugation strategy could also be applied to conjugate azide-containing poly (ethylene glycol) and poly (NIPAAm). The results indicate that our method provides a simple and robust tool for fabricating antifouling surfaces on a wide range of substrates using CVD technology of functionalized poly (p-xylylenes) for biosensor, diagnostics, immunoassay, and other biomaterial applications.
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4
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Jing J, Chen S, Lu Q. Gradient Photothermal Field for Precisely Directing Cell Sheet Detachment. ACTA ACUST UNITED AC 2019; 3:e1800334. [DOI: 10.1002/adbi.201800334] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/24/2019] [Indexed: 01/06/2023]
Affiliation(s)
- Jiange Jing
- School of Chemistry and Chemical EngineeringThe State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University Shanghai 200240 China
| | - Shuangshuang Chen
- School of Chemical Science and EngineeringTong Ji University Shanghai 200092 China
| | - Qinghua Lu
- School of Chemistry and Chemical EngineeringThe State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong University Shanghai 200240 China
- School of Chemical Science and EngineeringTong Ji University Shanghai 200092 China
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5
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Ahmed IN, Chang R, Keng MC, Chien HW, Chen HY, Tsai WB. Immobilization of functional polymers on poly(4-benzoyl-pxylylene-co-p-xylylene) films via photochemical conjugation for modulation of cell adhesion. Colloids Surf B Biointerfaces 2019; 174:360-366. [DOI: 10.1016/j.colsurfb.2018.11.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 10/17/2018] [Accepted: 11/07/2018] [Indexed: 12/25/2022]
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Choi A, Seo KD, Yoon H, Han SJ, Kim DS. Bulk poly(N-isopropylacrylamide) (PNIPAAm) thermoresponsive cell culture platform: toward a new horizon in cell sheet engineering. Biomater Sci 2019; 7:2277-2287. [DOI: 10.1039/c8bm01664j] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In contrast to the conventional ‘grafting’-based thermoresponsive cell culture platform, we first developed a bulk form of thermoresponsive cell culture platform for attaching/detaching diverse types and origins of the cell sheets in different shape.
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Affiliation(s)
- Andrew Choi
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Kyoung Duck Seo
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Hyungjun Yoon
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Seon Jin Han
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Dong Sung Kim
- Department of Mechanical Engineering
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
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7
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Liu C, Zhou Y, Sun M, Li Q, Dong L, Ma L, Cheng K, Weng W, Yu M, Wang H. Light-Induced Cell Alignment and Harvest for Anisotropic Cell Sheet Technology. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36513-36524. [PMID: 28984126 DOI: 10.1021/acsami.7b07202] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Well-organized orientation of cells and anisotropic extracellular matrix (ECM) are crucial in engineering biomimetic tissues, such as muscles, arteries, and nervous system, and so on. This strategy, however, is only beginning to be explored. Here, we demonstrated a light-induced cell alignment and harvest for anisotropic cell sheets (ACS) technology using light-responsive TiO2 nanodots film (TNF) and photo-cross-linkable gelatin methacrylate (GelMA). Cell initial behaviors on TNF might be controlled by micropatterns of light-induced distinct surface hydroxyl features, owing to a sensing mechanism of myosin II-driven retraction of lamellipodia. Further light treatment allowed ACS detachment from TNF surface while simultaneously solidified the GelMA, realizing the automatic transference of ACS. Moreover, two detached ACS were successfully stacked into a 3D bilayer construct with controllable orientation of individual layer and maintained cell alignment for more than 7 days. Interestingly, the anisotropic HFF-1 cell sheets could further induce the HUVECs to form anisotropic capillary-like networks via upregulating VEGFA and ANGPT1 and producing anisotropic ECM. This developed integrated-functional ACS technology therefore provides a novel route to produce complex tissue constructs with well-defined orientations and may have a profound impact on regenerative medicine.
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Affiliation(s)
- Chao Liu
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Ying Zhou
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Miao Sun
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Qi Li
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Lingqing Dong
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Liang Ma
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Kui Cheng
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Wenjian Weng
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Mengfei Yu
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
| | - Huiming Wang
- The Affiliated Stomatologic Hospital and ‡The First Affiliated Hospital of Medical College, Zhejiang University , Hangzhou 310003, China
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications and ∥The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University , Hangzhou 310027, China
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8
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Fabrication of cell sheets with anisotropically aligned myotubes using thermally expandable micropatterned hydrogels. Macromol Res 2016. [DOI: 10.1007/s13233-016-4070-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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9
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Chitooligomer-Immobilized Biointerfaces with Micropatterned Geometries for Unidirectional Alignment of Myoblast Cells. Biomolecules 2016; 6:12. [PMID: 26784249 PMCID: PMC4808806 DOI: 10.3390/biom6010012] [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: 12/09/2015] [Revised: 01/08/2016] [Accepted: 01/12/2016] [Indexed: 11/16/2022] Open
Abstract
Skeletal muscle possesses a robust capacity to regenerate functional architectures with a unidirectional orientation. In this study, we successfully arranged skeletal myoblast (C2C12) cells along micropatterned gold strips on which chitohexaose was deposited via a vectorial chain immobilization approach. Hexa-N-acetyl-d-glucosamine (GlcNAc6) was site-selectively modified at its reducing end with thiosemicarbazide, then immobilized on a gold substrate in striped micropatterns via S–Au chemisorption. Gold micropatterns ranged from 100 to 1000 µm in width. Effects of patterning geometries on C2C12 cell alignment, morphology, and gene expression were investigated. Unidirectional alignment of C2C12 cells having GlcNAc6 receptors was clearly observed along the micropatterns. Decreasing striped pattern width increased cell attachment and proliferation, suggesting that the fixed GlcNAc6 and micropatterns impacted cell function. Possibly, interactions between nonreducing end groups of fixed GlcNAc6 and cell surface receptors initiated cellular alignment. Our technique for mimicking native tissue organization should advance applications in tissue engineering.
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10
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Takahashi H, Okano T. Cell Sheet-Based Tissue Engineering for Organizing Anisotropic Tissue Constructs Produced Using Microfabricated Thermoresponsive Substrates. Adv Healthc Mater 2015; 4:2388-407. [PMID: 26033874 DOI: 10.1002/adhm.201500194] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 04/22/2015] [Indexed: 11/12/2022]
Abstract
In some native tissues, appropriate microstructures, including orientation of the cell/extracellular matrix, provide specific mechanical and biological functions. For example, skeletal muscle is made of oriented myofibers that is responsible for the mechanical function. Native artery and myocardial tissues are organized three-dimensionally by stacking sheet-like tissues of aligned cells. Therefore, to construct any kind of complex tissue, the microstructures of cells such as myotubes, smooth muscle cells, and cardiomyocytes also need to be organized three-dimensionally just as in the native tissues of the body. Cell sheet-based tissue engineering allows the production of scaffold-free engineered tissues through a layer-by-layer construction technique. Recently, using microfabricated thermoresponsive substrates, aligned cells are being harvested as single continuous cell sheets. The cell sheets act as anisotropic tissue units to build three-dimensional tissue constructs with the appropriate anisotropy. This cell sheet-based technology is straightforward and has the potential to engineer a wide variety of complex tissues. In addition, due to the scaffold-free cell-dense environment, the physical and biological cell-cell interactions of these cell sheet constructs exhibit unique cell behaviors. These advantages will provide important clues to enable the production of well-organized tissues that closely mimic the structure and function of native tissues, required for the future of tissue engineering.
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Affiliation(s)
- Hironobu Takahashi
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University; 8-1 Kawada-cho, Shinjuku-ku; Tokyo 162-8666 Japan
| | - Teruo Okano
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University; 8-1 Kawada-cho, Shinjuku-ku; Tokyo 162-8666 Japan
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11
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Zhernenkov M, Ashkar R, Feng H, Akintewe OO, Gallant ND, Toomey R, Ankner JF, Pynn R. Thermoresponsive PNIPAM Coatings on Nanostructured Gratings for Cell Alignment and Release. ACS APPLIED MATERIALS & INTERFACES 2015; 7:11857-62. [PMID: 25990000 DOI: 10.1021/acsami.5b01453] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) has been widely used as a surface coating to thermally control the detachment of adsorbed cells without the need for extreme stimuli such as enzyme treatment. Recently, the use of 2D and 3D scaffolds in controlling cell positioning, growth, spreading, and migration has been of a great interest in tissue engineering and cell biology. Here, we use a PNIPAM polymer surface coating atop a nanostructured linear diffraction grating to controllably change the surface topography of 2D linear structures using temperature stimuli. Neutron reflectometry and surface diffraction are utilized to examine the conformity of the polymer coating to the grating surface, its hydration profile, and its evolution in response to temperature variations. The results show that, in the collapsed state, the PNIPAM coating conforms to the grating structures and retains a uniform hydration of 63%. In the swollen state, the polymer expands beyond the grating channels and absorbs up to 87% water. Such properties are particularly desirable for 2D cell growth scaffolds with a built-in nonextreme tissue-release mechanism. Indeed, the current system demonstrates advanced performance in the effective alignment of cultured fibroblast cells and the easy release of the cells upon temperature change.
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Affiliation(s)
- Mikhail Zhernenkov
- †National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Rana Ashkar
- ‡Materials Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
- §Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Hao Feng
- ∥Center for the Exploration of Energy and Matter and Physics Department, Indiana University, Bloomington, Indiana 47405 United States
| | - Olukemi O Akintewe
- ⊥Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - Nathan D Gallant
- #Department of Mechanical Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - Ryan Toomey
- ⊥Department of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - John F Ankner
- ∇Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Roger Pynn
- ∥Center for the Exploration of Energy and Matter and Physics Department, Indiana University, Bloomington, Indiana 47405 United States
- ○Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
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12
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Shibata H, Shinozaki R, Ogura T, Sakai H, Abe M, Kawai G, Hashimoto K. Fabrication and BSA adsorption/desorption properties of titania/silica composite films modified with silane coupling agents. J Oleo Sci 2014; 63:1077-83. [PMID: 25213446 DOI: 10.5650/jos.ess14102] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In this study, we successfully prepared titania/silica composite films modified with silane coupling agents having amino groups and investigated their bovine serum albumin (BSA) adsorption/desorption behavior under light irradiation. XRD patterns and ATR/FT-IR spectra of the films revealed the formation of titania/silica composite films modified with silane coupling agents. In these films, the adsorption and desorption of BSA could be controlled by light irradiation, through the locally photoinduced superhydrophilic titania surface.
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Affiliation(s)
- Hirobumi Shibata
- Department of Life and Environmental Sciences, Chiba Institute of Technology
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13
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Stumpel JE, Ziółkowski B, Florea L, Diamond D, Broer DJ, Schenning APHJ. Photoswitchable ratchet surface topographies based on self-protonating spiropyran-NIPAAM hydrogels. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7268-7274. [PMID: 24813057 DOI: 10.1021/am500542f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work, self-protonating spiropyran-based poly(N-isopropylacrylamide) polymer networks are prepared. These photoresponsive hydrogel coatings can change their surface topography upon exposure with visible light in a neutral environment. Photoresponsive surface-constrained films have been fabricated for which the swelling behavior can be controlled in a reversible manner. In a first step, symmetrical switchable surface topologies with varying cross-link density are obtained by polymerization-induced diffusion. Under light exposure, the areas with low cross-link density swell more than the areas with high cross-link density, thus forming a corrugated surface. Asymmetric ratchet-like photoresponsive surfaces have been prepared on prestructured asymmetric substrates. As a result of thickness variation of the surface-confined hydrogel layer, an asymmetric swelling behavior is obtained. Depending on the cross-link density of the hydrogel, it is possible to switch between a ratchet and flat surface topography or even an inverse ratchet surface by light.
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Affiliation(s)
- Jelle E Stumpel
- Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology , Den Dolech 2, 5612 AZ Eindhoven, The Netherlands
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