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Chen L, Zeng Z, Li W. Poly(acrylic acid)-Assisted Intrafibrillar Mineralization of Type I Collagen: A Review. Macromol Rapid Commun 2023; 44:e2200827. [PMID: 36662644 DOI: 10.1002/marc.202200827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 01/06/2023] [Indexed: 01/21/2023]
Abstract
The mineralization of type I collagen is a biological process occurring in vertebrates by which some hard tissues such as bone and dentin are constructed. Due to the extensive clinical needs for bone defect repair and remineralization of mineral-depleted dentin, biomimetic mineralization of collagen is attracting more and more interests. Synthetic analogs of noncollagenous proteins are necessary for directing the in vitro mineralization. In this paper, the function and mechanism of poly(acrylic acid) (PAA) in regulating the mineralization, especially intrafibrillar mineralization (IM) of collagen are reviewed. As two mineralization patterns (extrafibrillar and intrafibrillar) co-exist in natural hard tissues, differences between them in terms of microstructure, biodegradation, cytocompatibility, osteoinduction in vitro, and performance in vivo are systematically compared. Then the roles of PAA in biomimetic collagen IM within one-analog and two-analog systems are discussed, respectively. Moreover, mineralization of some self-mineralizable collagen matrices is described. Due to the interactions between collagen and PAA play a crucial role in the processes of collagen mineralization, some reference researches are also provided involving the collagen/PAA interactions in some other fields. Finally, this review is ended with an outlook for future potential improvements based on the collection of existing bottlenecks in this field.
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Affiliation(s)
- Lei Chen
- Department of Bio-medical Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Zhiyong Zeng
- Key Laboratory of Eco-Textiles, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, P. R. China
| | - Wenbing Li
- Key Laboratory of Eco-Textiles, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, 214122, P. R. China
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2
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Zhang A, Sun W, Liang X, Chen X, Li Y, Liu X, Chen H. The role of carboxylic groups in heparin-mimicking polymer-functionalized surfaces for blood compatibility: Enhanced vascular cell selectivity. Colloids Surf B Biointerfaces 2021; 201:111653. [PMID: 33667866 DOI: 10.1016/j.colsurfb.2021.111653] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/15/2021] [Accepted: 02/20/2021] [Indexed: 10/22/2022]
Abstract
Blood compatibility is an eternal topic of biomedical materials. The effect of heparin-mimicking polymers (HMPs) on blood compatibility has been well studied, especially the synergistic effect of sugar unit and sulfonate/sulfate unit. However, carboxylic groups also play an important role in HMPs. In this work, copolymers of sodium 4-vinyl-benzenesulfonate (SS) and 2-methacrylamido glucopyranose (MAG) (poly(SS-co-MAG)) and poly(acrylate acid) (PAA) were self-assembled on Au surfaces with different feed ratios. When self-assembly of poly(SS-co-MAG) alone, the optimized feed ratio of SS and MAG for vascular cell selectivity was 1:1 (PS1M1); at this ratio the Au-PS1M1 surface showed the highest human umbilical vein endothelial cells (HUVECs) density and the lowest human umbilical vein smooth muscle cells (HUVSMCs) density. When self-assembly of PAA alone (surface designated as Au-PAA), the proliferation of both HUVECs and HUVSMCs was inhibited. Compared with either PS1M1 or PAA alone, the surfaces modified with both PAA and PS1M1 at the feed ratio of 1:1 (material designated as Au-PSM/PAA-2) showed enhanced promoting effect on HUVECs as well as enhanced inhibiting effect on HUVSMCs, indicating stronger vascular cell selectivity of carboxylic groups in the presence of sugar and sulfonate units.
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Affiliation(s)
- Aiyang Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China
| | - Wei Sun
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China
| | - Xinyi Liang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China
| | - Xianshuang Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China
| | - Yuepeng Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China
| | - Xiaoli Liu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China.
| | - Hong Chen
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, PR China.
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3
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Le NXT, Trinh KTL, Lee NY. Poly(acrylic acid) as an adhesion promoter for UV-assisted thermoplastic bonding: Application for the in vitro construction of human blood vessels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 122:111874. [PMID: 33641892 DOI: 10.1016/j.msec.2021.111874] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 12/27/2020] [Accepted: 01/06/2021] [Indexed: 11/25/2022]
Abstract
In this study, we introduced a novel adhesion bonding method for fabricating thermoplastic microdevices using poly(acrylic acid) (PAA) as a UV-assisted adhesion promoter. The bonding mechanism was based on the covalent cross-links between poly(methyl methacrylate) (PMMA) and PAA via the free radicals in their carbon backbone generated under UV irradiation. The water contact angle and Fourier-transformed infrared (FTIR) analysis were performed to analyze the surface characteristics of the PAA-coated PMMA. PMMAs were bonded under UV treatment for 60 s with the highest bond strength of around 1.18 MPa. The PMMA microdevice was leak-proof for over 200 h. Besides, clog-free PMMA microdevices with various-sizes microchannels were performed to demonstrate such a high applicable bonding method for microdevice fabrication. Moreover, PMMAs were bonded with other thermoplastics with a bond strength of around 0.5 MPa. Notably, collagen was easily coated inside the PMMA microchannels via electrostatic interaction between PAA and collagen which is beneficial for on-device cell culture. As a result, a layered co-culture model of smooth muscle cells (SMCs) and human umbilical vein endothelial cells (HUVECs) was realized inside simple straight microchannels mimicking human blood vessel wall. Therefore, the introduced bonding method could pave the way for fabricating microdevice for cell-related applications.
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Affiliation(s)
- Nguyen Xuan Thanh Le
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Kieu The Loan Trinh
- Department of Industrial Environmental Engineering, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea.
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4
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Taskin MB, Ahmad T, Wistlich L, Meinel L, Schmitz M, Rossi A, Groll J. Bioactive Electrospun Fibers: Fabrication Strategies and a Critical Review of Surface-Sensitive Characterization and Quantification. Chem Rev 2021; 121:11194-11237. [DOI: 10.1021/acs.chemrev.0c00816] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mehmet Berat Taskin
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Taufiq Ahmad
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Laura Wistlich
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry and Helmholtz Institute for RNA Based Infection Research, 97074 Würzburg, Germany
| | - Michael Schmitz
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Angela Rossi
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
| | - Jürgen Groll
- Department of Functional Materials in Medicine and Dentistry and Bavarian Polymer Institute, University of Würzburg, 97070 Würzburg, Germany
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5
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Shalchy F, Lovell C, Bhaskar A. Hierarchical porosity in additively manufactured bioengineering scaffolds: Fabrication & characterisation. J Mech Behav Biomed Mater 2020; 110:103968. [PMID: 32745973 DOI: 10.1016/j.jmbbm.2020.103968] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 06/24/2020] [Accepted: 06/30/2020] [Indexed: 10/23/2022]
Abstract
Biomedical scaffolds with a high degree of porosity are known to facilitate the growth of healthy functioning tissues. In this study, scaffolds with hierarchical porosity are manufactured and their mechanical and thermal properties are characterised. Multi-scale porosity is achieved in scaffolds fabricated by Fused Deposition Modelling (FDM) in a novel way. Random intrinsic porosity at micron length scale obtained from particulate leaching is combined with the structured extrinsic porosity at millimeter length scales afforded by controlling the spacing between the struts. Polylactic acid (PLA) is blended with Polyvinyl alcohol (PVA) and an inorganic sacrificial phase, sodium chloride (NaCl), to produce pores at length scales of up to two orders of magnitude smaller than the inter-filament voids within 3D printed lattices. The specific elastic modulus and specific strength are maximised by optimising the polymer blends. The porosity level and pore size distribution of the foamy filaments within lattices are quantified statistically. Compression tests are performed on the porous samples and the observed mechanical response is attributed to the microstructure and density. Simple cellular solid models that possess power law are used to explain the measured trends and the dependence is associated with various mechanisms of elastic deformation of the cell walls. The relationship between pore architecture, pore connectivity, the blend material composition, and mechanical response of produced foams is brought out. Foams obtained using the PLA:PVA:NaCl 42%-18%-40% material blends show relatively high specific elastic modulus, specific strength and strain at failure. A quadratic power law relating the Young's modulus with the relative density is experimentally obtained, which is consistent with theoretical models for open-cell foams. 3D printing with blends, followed by leaching, produces structures with cumulative intrinsic and extrinsic porosity as high as 80%, in addition to good mechanical integrity.
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Affiliation(s)
- Faezeh Shalchy
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK.
| | | | - Atul Bhaskar
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK
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6
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Coating of modified poly(ethylene terephthalate) fibers with sericin-capped silver nanoparticles for antimicrobial application. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02820-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Norouzi MR, Ghasemi-Mobarakeh L, Gharibi H, Meamar R, Ajalloueian F, Chronakis IS. Surface modification of poly (ethylene terephthalate) fabric by soy protein isolate hydrogel for wound dressing application. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1493684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | | | - Hamidreza Gharibi
- Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
| | - Rokhsareh Meamar
- Isfahan Clinical Toxicology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Ajalloueian
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - Ioannis S. Chronakis
- Research Group for Nano-Bio Science, National Food Institute, Technical University of Denmark, Kgs. Lyngby, Denmark
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8
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Wang JL, Chen Q, Du BB, Cao L, Lin H, Fan ZY, Dong J. Enhanced bone regeneration composite scaffolds of PLLA/β-TCP matrix grafted with gelatin and HAp. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 87:60-69. [PMID: 29549950 DOI: 10.1016/j.msec.2018.02.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 12/03/2017] [Accepted: 02/18/2018] [Indexed: 11/17/2022]
Abstract
The composite polylactide PLLA/β-TCP scaffolds were fabricated by solution casting and were coated with gelatin/hydroxyapatite (Gel/HAp) to improve the biological properties of the composite scaffolds. The Gel/HAp mixture was prepared using an in situ reaction, and a grafting-coating method was used to increase the efficiency of coating the PLLA/β-TCP matrix with Gel/HAp. First, free amino groups were introduced by 1,6-hexanediamine to aminolyze the PLLA/β-TCP matrix surface. Second, glutaraldehyde was coupled to Gel/HAp as a crosslinking agent. The structure and properties of Gel/HAp-modified PLLA/β-TCP films were characterized by Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and water contact angle measurements (WCA). The experimental results show that 23 wt% HAp was uniformly dispersed in the gelatin coating by in situ synthesis. The Gel/HAp composite coating was successfully immobilized on the aminolyzed PLLA/β-TCP surface via a chemical grafting method, which promoted a lower degradation rate and was more hydrophilic than a physical grafting method. The Gel/HAp composite coating adhered tightly and homogeneously to the hydrophobic PLLA/β-TCP surface. Moreover, mouse embryo osteoblast precursor (MC3T3-E1) cells grown on the scaffolds were behaviorally and morphologically characterized. The results indicated that the Gel/HAp composite coating was favorable for the attachment and proliferation of preosteoblasts and that Gel/HAp-NH-PLLA/β-TCP would be a candidate scaffold for bone repair.
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Affiliation(s)
- Jie-Lin Wang
- Department of Materials Science, Fudan University, Shanghai 200433, PR China
| | - Qian Chen
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
| | - Bei-Bei Du
- Department of Materials Science, Fudan University, Shanghai 200433, PR China
| | - Lu Cao
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
| | - Hong Lin
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China
| | - Zhong-Yong Fan
- Department of Materials Science, Fudan University, Shanghai 200433, PR China.
| | - Jian Dong
- Department of Orthopaedic Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, PR China.
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9
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Baba Ismail YM, Ferreira AM, Bretcanu O, Dalgarno K, El Haj AJ. Polyelectrolyte multi-layers assembly of SiCHA nanopowders and collagen type I on aminolysed PLA films to enhance cell-material interactions. Colloids Surf B Biointerfaces 2017; 159:445-453. [PMID: 28837894 DOI: 10.1016/j.colsurfb.2017.07.086] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 07/07/2017] [Accepted: 07/25/2017] [Indexed: 12/22/2022]
Abstract
This paper presents a new approach in assembling bone extracellular matrix components onto PLA films, and investigates the most favourable environment which can be created using the technique for cell-material interactions. Poly (lactic acid) (PLA) films were chemically modified by covalently binding the poly(ethylene imine) (PEI) as to prepare the substrate for immobilization of polyelectrolyte multilayers (PEMs) coating. Negatively charged polyelectrolyte consists of well-dispersed silicon-carbonated hydroxyapatite (SiCHA) nanopowders in hyaluronic acid (Hya) was deposited onto the modified PLA films followed by SiCHA in collagen type I as the positively charged polyelectrolyte. The outermost layer was finally cross-linked by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrocholoride and N-hydroxysulfosuccinimide sodium salt (EDC/NHS) solutions. The physicochemical features of the coated PLA films were monitored via X-ray Photoelectron Spectroscopy (XPS) and Atomic Force Microscope (AFM). The amounts of calcium and collagen deposited on the surface were qualitatively and quantitatively determined. The surface characterizations suggested that 5-BL has the optimum surface roughness and highest amounts of calcium and collagen depositions among tested films. In vitro human mesenchymal stem cells (hMSCs) cultured on the coated PLA films confirmed that the coating materials greatly improved cell attachment and survival compared to unmodified PLA films. The cell viability, cell proliferation and Alkaline Phosphatase (ALP) expression on 5-BL were found to be the most favourable of the tested films. Hence, this newly developed coating materials assembly could contribute to the improvement of the bioactivity of polymeric materials and structures aimed to bone tissue engineering applications.
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Affiliation(s)
- Yanny Marliana Baba Ismail
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Engineering Campus, 14300 Nibong Tebal, Penang, Malaysia; Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Keele University, Thornburrow Drive, Hartshill, Stoke-on-Trent ST47QB, United Kingdom.
| | - Ana Marina Ferreira
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle-upon-Tyne NE17RU, United Kingdom
| | - Oana Bretcanu
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle-upon-Tyne NE17RU, United Kingdom
| | - Kenneth Dalgarno
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle-upon-Tyne NE17RU, United Kingdom
| | - Alicia J El Haj
- Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Keele University, Thornburrow Drive, Hartshill, Stoke-on-Trent ST47QB, United Kingdom
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10
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Ramot Y, Haim-Zada M, Domb AJ, Nyska A. Biocompatibility and safety of PLA and its copolymers. Adv Drug Deliv Rev 2016; 107:153-162. [PMID: 27058154 DOI: 10.1016/j.addr.2016.03.012] [Citation(s) in RCA: 269] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 03/24/2016] [Accepted: 03/26/2016] [Indexed: 12/20/2022]
Abstract
PLA and its copolymers are commonly used for a wide variety of applications. While they are considered to be biocompatible, side effects resulting from their implantation have been reported. The implantation of biomaterials always results in a foreign body reaction. Such a reaction has also been reported following PLA and its copolymers. This article reviews the process of inflammatory reaction that is to be expected following implantation of PLA, and it highlights specific cases in which the inflammatory reaction can result in safety concerns. The authors also review selected cases from different medical fields to demonstrate possible clinical side effects resulting from its use.
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11
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Fragal VH, Cellet TS, Pereira GM, Fragal EH, Costa MA, Nakamura CV, Asefa T, Rubira AF, Silva R. Covalently-layers of PVA and PAA and in situ formed Ag nanoparticles as versatile antimicrobial surfaces. Int J Biol Macromol 2016; 91:329-37. [DOI: 10.1016/j.ijbiomac.2016.05.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 04/08/2016] [Accepted: 05/14/2016] [Indexed: 11/29/2022]
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12
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Seo JW, Shin US. Preparation of Positively and Negatively Charged Carbon Nanotube-Collagen Hydrogels with pH Sensitive Characteristic. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2016. [DOI: 10.5012/jkcs.2016.60.3.187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Chen X, Meng Y, Wang Y, Du C, Yang C. A Biomimetic Material with a High Bio-responsibility for Bone Reconstruction and Tissue Engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 22:153-63. [PMID: 20546681 DOI: 10.1163/092050609x12583524936191] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A biomimetic composite was prepared using type-I collagen as the matrix, and particles of sol-gel-derived bioactive glass (58S), hyaluronic acid and phosphatidylserine as additives. The material has an interconnected 3-D porous structure with a porosity > 85%. When incubated in simulated body fluid (SBF), the composite induced the formation of microcrystals of bone-like hydroxyapatite (HA), suggesting good bioactive properties. During the in vitro cell-culture experiment, MC3T3-E1 cells adhered to, migrated and spread on the surface of the porous composite. The material was employed to repair a 10-mm defect in a rabbit's radius. The composite was gradually degraded within 8 weeks and replaced by new bone. After 12 weeks, the bone marrow cavity was restored and the Haversian canal was noted from the histological observation. The biomimetic composite is a potential scaffold material for bone reconstruction and bone tissue engineering.
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Affiliation(s)
- Xiaofeng Chen
- a Biomaterials Research Institute, College of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China; The Key Laboratory of Specially Functional Materials, Ministry of Education, South China University of Technology, Guangzhou, Guangdong 510640, P. R. China
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14
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Qu Z, Xu H, Gu H. Synthesis and Biomedical Applications of Poly((meth)acrylic acid) Brushes. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14537-14551. [PMID: 26067846 DOI: 10.1021/acsami.5b02912] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Poly((meth)acrylic acid) (P(M)AA) brushes possess a number of distinctive properties that are particularly attractive for biomedical applications. This minireview summarizes recent advances in the synthesis and biomedical applications of P(M)AA brushes and brushes containing P(M)AA segments. First, we review different surface-initiated polymerization (SIP) methods, with a focus on recent progress in the surface-initiated controlled/living radical polymerization (SI-CLRP) techniques used to generate P(M)AA brushes with a tailored structure. Next, we discuss biomolecule immobilization methods for P(M)AA brushes, including physical adsorption, covalent binding, and affinity interactions. Finally, typical biomedical applications of P(M)AA brushes are reviewed, and their performance is discussed based on their unique properties. We conclude that P(M)AA brushes are promising biomaterials, and more potential biomedical applications are expected to emerge with the further development of synthetic techniques and increased understanding of their interactions with biological systems.
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Affiliation(s)
- Zhenyuan Qu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China
| | - Hong Xu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China
| | - Hongchen Gu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, School of Biomedical Engineering, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030, China
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15
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Heo Y, Shin YM, Lee YB, Lim YM, Shin H. Effect of immobilized collagen type IV on biological properties of endothelial cells for the enhanced endothelialization of synthetic vascular graft materials. Colloids Surf B Biointerfaces 2015. [PMID: 26196092 DOI: 10.1016/j.colsurfb.2015.07.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Regeneration of healthy endothelium onto vascular graft materials is imperative for prevention of intimal hyperplasia and thrombogenesis. In this study, we investigated the effect of collagen type IV (COL-IV) immobilized onto electrospun nanofibers on modulation of endothelial cell (EC) function, as a potential signal to rapid endothelialization of vascular grafts. COL-IV is assembled in basement membrane underneath intimal layer and regulates morphogenesis of blood vessels. For immobilization of COL-IV, poly(l-lactic acid) (PLLA) nanofibers (PL) were prepared as a model vascular graft substrate, onto which acrylic acid (AAc) was then grafted by using gamma-ray irradiation. AAc graft was dependent on irradiation doses and AAc concentrations, which allowed us to select the condition of 5% (v/v) AAc and 10 kGy for further conjugation of COL-IV. COL-IV immobilization was proportionally controlled as a function of its concentration. Atomic force microscope (AFM) analysis qualitatively supported immobilization of COL-IV, demonstrating increase in root mean square roughness of the PL from 665.37 ± 13.20 nm to 1440.74 ± 33.24. However, the Young's modulus of nanofibers was retained as approximately 1 MPa, regardless of surface modification. The number of ECs attached on the nanofibers with immobilized COL-IV was significantly increased by 5 times (1052 ± 138 cells/mm(2)) from pristine PL (234 ± 41 cells/mm(2)). In addition, the effect of immobilized COL-IV was profound for enhancing proliferation and up-regulation of markers implicated in rapid endothelialization. Collectively, our results suggest that COL-IV immobilized onto electrospun PLLA nanofibers may serve as a promising instructive cue used in vascular graft materials.
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Affiliation(s)
- Yunhoe Heo
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea
| | - Young Min Shin
- Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Gumgugil, Jeongeup, Jeollabuk-do 580-185, Republic of Korea
| | - Yu Bin Lee
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea
| | - Youn Mook Lim
- Research Division for Industry and Environment, Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Gumgugil, Jeongeup, Jeollabuk-do 580-185, Republic of Korea.
| | - Heungsoo Shin
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, Hanyang University, Seoul 133-791, Republic of Korea; BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, Republic of Korea.
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16
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Xie L, Xie Y, Wu Q, Wang M, Wu Q, Zhou X, Ge X. Effect of Poly(acrylic acid)-Modified Poly(ethylene terephthalate) on Improving the Integrated Mechanical Properties of Poly(ethylene terephthalate)/Elastomer Blend. Ind Eng Chem Res 2015. [DOI: 10.1021/acs.iecr.5b00091] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lizhao Xie
- CAS
Key Laboratory of Soft Matter Chemistry, Department of Polymer Science
and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Yunyun Xie
- CAS
Key Laboratory of Soft Matter Chemistry, Department of Polymer Science
and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qianghua Wu
- CAS
Key Laboratory of Soft Matter Chemistry, Department of Polymer Science
and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Mozhen Wang
- CAS
Key Laboratory of Soft Matter Chemistry, Department of Polymer Science
and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Qichao Wu
- Guangdong Tianan New Material Co., Ltd., Foshan, Guangdong 528000, P. R. China
| | - Xiao Zhou
- Guangdong Tianan New Material Co., Ltd., Foshan, Guangdong 528000, P. R. China
| | - Xuewu Ge
- CAS
Key Laboratory of Soft Matter Chemistry, Department of Polymer Science
and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
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17
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Cui M, Liu L, Guo N, Su R, Ma F. Preparation, cell compatibility and degradability of collagen-modified poly(lactic acid). Molecules 2015; 20:595-607. [PMID: 25569516 PMCID: PMC6272401 DOI: 10.3390/molecules20010595] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 12/18/2014] [Indexed: 11/16/2022] Open
Abstract
Poly(lactic acid) (PLA) was modified using collagen through a grafting method to improve its biocompatibility and degradability. The carboxylic group at the open end of PLA was transferred into the reactive acylchlorided group by a reaction with phosphorus pentachloride. Then, collagen-modified PLA (collagen-PLA) was prepared by the reaction between the reactive acylchlorided group and amino/hydroxyl groups on collagen. Subsequently, the structure of collagen-PLA was confirmed by Fourier transform infrared spectroscopy, fluorescein isothiocyanate-labeled fluorescence spectroscopy, X-ray photoelectron spectroscopy, and DSC analyses. Finally, some properties of collagen-PLA, such as hydrophilicity, cell compatibility and degradability were characterized. Results showed that collagen had been grafted onto the PLA with 5% graft ratio. Water contact angle and water absorption behavior tests indicated that the hydrophilicity of collagen-PLA was significantly higher than that of PLA. The cell compatibility of collagen-PLA with mouse embryonic fibroblasts (3T3) was also significantly better than PLA in terms of cell morphology and cell proliferation, and the degradability of PLA was also improved after introducing collagen. Results suggested that collagen-PLA was a promising candidate for biomedical applications.
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Affiliation(s)
- Miaomiao Cui
- School of Chemical & Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China.
| | - Leili Liu
- School of Chemical & Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China.
| | - Ning Guo
- School of Chemical & Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China.
| | - Ruixia Su
- School of Chemical & Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China.
| | - Feng Ma
- School of Chemical & Pharmaceutical Engineering, Qilu University of Technology, 3501 Daxue Road, Jinan 250353, China.
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18
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Shin YM, Lim JY, Park JS, Gwon HJ, Jeong SI, Ahn SJ, Shin H, Lim YM. Modulation of human mesenchymal stem cell survival on electrospun mesh with co-immobilized epithelial growth factor and gelatin. RSC Adv 2015. [DOI: 10.1039/c5ra01626f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Co-immobilization of EGF and gelatin on a fibrous mesh promotes spreading and viability of hMSC, and coupled EGF involves involucrin expression and procollagen secretion, indicating trans-differentiation to keratinocyte-like cell.
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Affiliation(s)
- Young Min Shin
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Jong-Young Lim
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Jong-Seok Park
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Hui-Jeong Gwon
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Sung In Jeong
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Sung-Jun Ahn
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
| | - Heungsoo Shin
- Department of Bioengineering
- College of Engineering
- Hanyang University
- Seoul 133-791
- Korea
| | - Youn-Mook Lim
- Research Division for Industry & Environment
- Advanced Radiation Technology Institute
- Korea Atomic Energy Research Institute
- Jeongeup 580-185
- Korea
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19
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Rudisill SG, DiVito MD, Hubel A, Stein A. In vitro collagen fibril alignment via incorporation of nanocrystalline cellulose. Acta Biomater 2015; 12:122-128. [PMID: 25449923 DOI: 10.1016/j.actbio.2014.10.024] [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: 05/27/2014] [Revised: 09/25/2014] [Accepted: 10/19/2014] [Indexed: 12/29/2022]
Abstract
This study demonstrates a method for producing ordered collagen fibrils on a similar length scale to those in the cornea, using a one-pot liquid-phase synthesis. The alignment persists throughout samples on the mm scale. The addition of nanocrystalline cellulose (NCC), a biocompatible and widely available material, to collagen prior to gelation causes the fibrils to align and achieve a narrow size distribution (36±8nm). The effects of NCC loading in the composites on microstructure, transparency and biocompatibility are studied by scanning electron microscopy, ultraviolet-visible spectroscopy and cell growth experiments. A 2% loading of NCC increases the transparency of collagen while producing an ordered microstructure. A mechanism is proposed for the ordering behavior on the basis of enhanced hydrogen bonding during collagen gel formation.
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20
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Wang L, Chen W, Terentjev E. Effect of micro-patterning on bacterial adhesion on polyethylene terephthalate surface. J Biomater Appl 2014; 29:1351-62. [DOI: 10.1177/0885328214563998] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Bacterial adhesion on surfaces commonly used in medicine and food industry could lead to infections and illnesses. Topographically patterned surfaces recently have shown to be a promising alternative to chemical antibacterial methods, which might release cytotoxin and promote antibiotic resistance. In this study, we fabricated micro-patterned polyethylene terephthalate surfaces, and quantitatively explored the amount and localization of Escherichia coli MG1655 cells attached on a series of defined topographies. The adhesion was conducted in static conditions and under a weak flow, in both physiological buffer and nutritious solutions. The results showed that in the presence of weak shear force, live bacteria could still maintain sensing ability in nutritious culture, but not in buffer solution. The finely textured surface, which could inhibit bacterial adhesion in the early stage of attachment, reversed its effect to enhance the adhesion after 24 h incubation, indicating that microbial cells seemed to be able to sense the disadvantageous condition and eventually overcome it. In terms of adhesion localization, bacteria exhibited preferential adhesion onto the edges of topographic features. The patterned substrates that have the most even (homogeneous) bacterial localization on topographic features retained the least attachment after 24 h exposure.
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Affiliation(s)
- Liyun Wang
- School of Food Science and Technology, Jiangnan University, Wuxi, China
- Cavendish Laboratory, University of Cambridge, Cambridge, UK
| | - Wei Chen
- School of Food Science and Technology, Jiangnan University, Wuxi, China
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21
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Krishnamoorthy M, Hakobyan S, Ramstedt M, Gautrot JE. Surface-initiated polymer brushes in the biomedical field: applications in membrane science, biosensing, cell culture, regenerative medicine and antibacterial coatings. Chem Rev 2014; 114:10976-1026. [PMID: 25353708 DOI: 10.1021/cr500252u] [Citation(s) in RCA: 384] [Impact Index Per Article: 38.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahentha Krishnamoorthy
- Institute of Bioengineering and ‡School of Engineering and Materials Science, Queen Mary University of London , Mile End Road, London E1 4NS, United Kingdom
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22
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Formentín P, Alba M, Catalán Ú, Fernández-Castillejo S, Pallarès J, Solà R, Marsal LF. Effects of macro- versus nanoporous silicon substrates on human aortic endothelial cell behavior. NANOSCALE RESEARCH LETTERS 2014; 9:421. [PMID: 25246859 PMCID: PMC4158340 DOI: 10.1186/1556-276x-9-421] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 07/23/2014] [Indexed: 05/28/2023]
Abstract
Human aortic endothelial cells play a key role in the pathogenesis of atherosclerosis, which is a common, progressive, and multifactorial disease that is the clinical endpoint of an inflammatory process and endothelial dysfunction. Study and development of new therapies against cardiovascular disease must be tested in vitro cell models, prior to be evaluated in vivo. To this aim, new cell culture platforms are developed that allow cells to grow and respond to their environment in a realistic manner. In this work, the cell adhesion and morphology of endothelial cells are investigated on functionalized porous silicon substrates with two different pore size configurations: macroporous and nanoporous silicon. Herein, we modified the surfaces of porous silicon substrates by aminopropyl triethoxysilane, and we studied how different pore geometries induced different cellular response in the cell morphology and adhesion. The cell growth over the surface of porous silicon becomes an attractive field, especially for medical applications. Surface properties of the biomaterial are associated with cell adhesion and as well as, with proliferation, migration and differentiation.
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Affiliation(s)
- Pilar Formentín
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica I Autómatica, Universitat Rovira i Virgili, Països Catalans 26, Tarragona 43007, Spain
| | - María Alba
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica I Autómatica, Universitat Rovira i Virgili, Països Catalans 26, Tarragona 43007, Spain
| | - Úrsula Catalán
- Unit of Lipids and Atherosclerosis Research, Facultat de Medicina I Ciències de la Salut, Universitat Rovira i Virgili, Sant Llorenç 21, Reus, Tarragona 43201, Spain
| | - Sara Fernández-Castillejo
- Unit of Lipids and Atherosclerosis Research, Facultat de Medicina I Ciències de la Salut, Universitat Rovira i Virgili, Sant Llorenç 21, Reus, Tarragona 43201, Spain
| | - Josep Pallarès
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica I Autómatica, Universitat Rovira i Virgili, Països Catalans 26, Tarragona 43007, Spain
| | - Rosà Solà
- Unit of Lipids and Atherosclerosis Research, Facultat de Medicina I Ciències de la Salut, Universitat Rovira i Virgili, Sant Llorenç 21, Reus, Tarragona 43201, Spain
| | - Lluís F Marsal
- Nano-electronic and Photonic Systems, Departament d’Enginyeria Electrònica, Elèctrica I Autómatica, Universitat Rovira i Virgili, Països Catalans 26, Tarragona 43007, Spain
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23
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Smooth muscle cell functionality on collagen immobilized polycaprolactone nanowire surfaces. J Funct Biomater 2014; 5:58-77. [PMID: 24956440 PMCID: PMC4099974 DOI: 10.3390/jfb5020058] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/23/2014] [Accepted: 04/29/2014] [Indexed: 11/21/2022] Open
Abstract
Inhibition of smooth muscle cell (SMC) proliferation and preservation of a differentiated state are important aspects in the management, avoidance and progression of vascular diseases. An understanding of the interaction between SMCs and the biomaterial involved is essential for a successful implant. In this study, we have developed collagen immobilized nanostructured surfaces with controlled arrays of high aspect ratio nanowires for the growth and maintenance of human aortic SMCs. The nanowire surfaces were fabricated from polycaprolactone and were immobilized with collagen. The objective of this study is to reveal how SMCs interact with collagen immobilized nanostructures. The results indicate significantly higher cellular adhesion on nanostructured and collagen immobilized surfaces; however, SMCs on nanostructured surfaces exhibit a more elongated phenotype. The reduction of MTT was significantly lower on nanowire (NW) and collagen immobilized NW (colNW) surfaces, suggesting that SMCs on nanostructured surfaces may be differentiated and slowly dividing. Scanning electron microscopy results reveal that SMCs on nanostructured surfaces are more elongated and that cells are interacting with the nano-features on the surface. After providing differentiation cues, heavy chain myosin and calponin, specific to a contractile SMC phenotype, are upregulated on collagen immobilized surfaces. These results suggest that nanotopography affects cell adhesion, proliferation, as well as cell elongation, while collagen immobilized surfaces greatly affect cell differentiation.
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24
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Zhang J, Kasuya K, Takemura A, Isogai A, Iwata T. Properties and enzymatic degradation of poly(acrylic acid) grafted polyhydroxyalkanoate films by plasma-initiated polymerization. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.04.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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González-Paz RJ, Ferreira AM, Mattu C, Boccafoschi F, Lligadas G, Ronda JC, Galià M, Cádiz V, Ciardelli G. Cytocompatible polyurethanes from fatty acids through covalent immobilization of collagen. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.02.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Liang M, Yao J, Chen X, Huang L, Shao Z. Silk fibroin immobilization on poly(ethylene terephthalate) films: Comparison of two surface modification methods and their effect on mesenchymal stem cells culture. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1409-16. [DOI: 10.1016/j.msec.2012.12.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 11/08/2012] [Accepted: 12/10/2012] [Indexed: 11/29/2022]
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27
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García-García JM, Quijada-Garrido I, López L, París R, Núñez-López MT, de la Peña Zarzuelo E, Garrido L. The surface modification of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) copolymers to improve the attachment of urothelial cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:362-9. [DOI: 10.1016/j.msec.2012.08.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 08/03/2012] [Accepted: 08/29/2012] [Indexed: 12/20/2022]
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28
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Taraballi F, Zanini S, Lupo C, Panseri S, Cunha C, Riccardi C, Marcacci M, Campione M, Cipolla L. Amino and carboxyl plasma functionalization of collagen films for tissue engineering applications. J Colloid Interface Sci 2012; 394:590-7. [PMID: 23266023 DOI: 10.1016/j.jcis.2012.11.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Revised: 11/16/2012] [Accepted: 11/17/2012] [Indexed: 01/21/2023]
Abstract
Type I collagen films have been functionalized on their surfaces by plasma treatment with carboxyl and amino groups to improve their potential for grafting bioactive molecules. The physico-chemical properties of the plasma-treated films were evaluated and compared to the untreated materials by water contact angle, SEM and AFM. The presence of new functional groups on the film surfaces has been assessed by ATR-FTIR spectra after chemical derivatization. Moreover, the biocompatibility of the plasma-treated films was studied with MG-63 human osteoblast-like cells, evaluating cell proliferation, viability and morphology at 1, 3 and 7 days.
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Affiliation(s)
- F Taraballi
- Dept. of Biotechnology and Biosciences, University of Milano-Bicocca, P.zza della Scienza 2, 20126 Milano, Italy
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29
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Burrows MC, Zamarion VM, Filippin-Monteiro FB, Schuck DC, Toma HE, Campa A, Garcia CRS, Catalani LH. Hybrid Scaffolds Built From PET and Collagen as a Model For Vascular Graft Architecture. Macromol Biosci 2012; 12:1660-70. [DOI: 10.1002/mabi.201200154] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Revised: 07/23/2012] [Indexed: 11/11/2022]
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30
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Electrospun elastin-like polypeptide enriched polyurethanes and their interactions with vascular smooth muscle cells. Acta Biomater 2012; 8:2493-503. [PMID: 22459513 DOI: 10.1016/j.actbio.2012.03.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 03/01/2012] [Accepted: 03/20/2012] [Indexed: 11/23/2022]
Abstract
In vascular tissue, elastin is an essential extracellular matrix protein that plays an important biomechanical and biological signalling role. Native elastin is insoluble and is difficult to extract from tissues, which results in its relatively rare use for the fabrication of vascular tissue engineering scaffolds. Recombinant elastin-like polypeptide-4 (ELP4), which mimics the structure and function of native tropoelastin, represents a practical alternative to the native elastic fibre for vascular applications. In this study, electrospinning was utilized to fabricate fibrous scaffolds which were subsequently surface modified with ELP4 and used as substrates for smooth muscle cell culture. ELP4 surface modified materials demonstrated enhanced smooth muscle cell (SMC) adhesion and maintenance of cell numbers over a 1-week period relative to controls. SMCs seeded on the ELP4 surface modified materials were also shown to exhibit the cell morphology and biological markers of a contractile phenotype including a spindle-like morphology, actin filament organization and smooth muscle myosin heavy chain expression. Competitive inhibition experiments demonstrated that the elastin-laminin cell surface receptor and its affinity for the VGVAPG peptide sequence on ELP4 molecules are likely involved in the initial SMC contact with the ELP4 modified materials. Elastin-like polypeptides show promise as surface modifiers for candidate scaffolds for engineering contractile vascular tissues.
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31
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Qi R, Cao X, Shen M, Guo R, Yu J, Shi X. Biocompatibility of Electrospun Halloysite Nanotube-Doped Poly(Lactic-co-Glycolic Acid) Composite Nanofibers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:299-313. [DOI: 10.1163/092050610x550340] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Ruiling Qi
- a Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, P. R. China; College of Textiles, Donghua University, Shanghai 201620, P. R. China
| | - Xueyan Cao
- b College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
| | - Mingwu Shen
- c College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
| | - Rui Guo
- d College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
| | - Jianyong Yu
- e Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, P. R. China; Modern Textile Institute, Donghua University, Shanghai 201620, P. R. China
| | - Xiangyang Shi
- f Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, P. R. China; College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, P. R. China
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32
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Xu Y, Fu W, Li G, Shi J, Tan H, Hu K, Cui F, Lin Q, Zhang X. Autologous urothelial cells transplantation onto a prefabricated capsular stent for tissue engineered ureteral reconstruction. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1119-1128. [PMID: 22382733 DOI: 10.1007/s10856-012-4583-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 02/06/2012] [Indexed: 05/31/2023]
Abstract
In this study, we have fabricated an artificial ureter by transplantation of in vitro-expanded urothelial cells onto an in vivo-prefabricated capsular stent using tissue engineering methods. Spiral poly (L-lactic acid) (PLLA) stents were transplanted into the subcutaneous of Wistar rats for a period of 1, 2 or 3 weeks to induce the formation of connective tissue capsules on their surfaces. The capsular PLLA stents were then decellularized and further recellularized with bladder epithelial cells to fabricate artificial ureters. The results showed that the entrapped cells in all capsules remained continuously proliferation and lined up in continuous layers. In addition, the urothelial cells on the capsular stents with an embedding period of 2 or 3 weeks showed higher proliferative viability compared with the cells on the stents with an embedding time of 1 week (P < 0.05). The results of the study indicated that the prefabricated capsular stents could serve as alternative cell carriers for tissue engineered ureters, especially with embedding time from 2 to 3 weeks.
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Affiliation(s)
- Yongde Xu
- Department of Urology, PLA General Hospital, Military Postgraduate Medical College, Haidian District, Beijing, China
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33
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Charbonneau C, Ruiz JC, Lequoy P, Hébert MJ, De Crescenzo G, Wertheimer MR, Lerouge S. Chondroitin sulfate and epidermal growth factor immobilization after plasma polymerization: a versatile anti-apoptotic coating to promote healing around stent grafts. Macromol Biosci 2012; 12:812-21. [PMID: 22457238 DOI: 10.1002/mabi.201100447] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2011] [Revised: 02/03/2012] [Indexed: 11/09/2022]
Abstract
Bioactive coatings constitute an interesting approach to enhance healing around implants, such as stent-grafts used in endovascular aneurysm repair. Three different plasma techniques, namely NH₃ plasma functionalization and atmospheric- or low-pressure plasma polymerization, are compared to create amino groups and covalently bind CS and EGF bioactive molecules on PET. The latter presents the greatest potential. CS + EGF coating is shown to strongly decrease cell apoptosis and cell depletion in serum-free medium, while increasing cell growth compared to unmodified PET. This versatile biomimetic coating holds promise in promoting vascular repair around stent-grafts, where resistance to apoptosis is a key issue.
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Affiliation(s)
- Cindy Charbonneau
- Research Centre, Centre Hospitalier de l'Université de Montréal-CRCHUM, 1560 Rue Sherbrooke Est, Montréal-Qc H2L 4M1, Canada
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34
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Degoutin S, Jimenez M, Casetta M, Bellayer S, Chai F, Blanchemain N, Neut C, Kacem I, Traisnel M, Martel B. Anticoagulant and antimicrobial finishing of non-woven polypropylene textiles. Biomed Mater 2012; 7:035001. [DOI: 10.1088/1748-6041/7/3/035001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Wan PJ, Tan DS, Li ZS, Zhang XQ, Li JH, Tan H. Biomimetic surface preparation of inert polymer films via grafting long monoalkyl chain phosphatidylcholine. CHINESE JOURNAL OF POLYMER SCIENCE 2011. [DOI: 10.1007/s10118-012-1111-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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36
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PAN XIAOTAO, AW CAILI, DU YANAN, YU HANRY, WOHLAND THORSTEN. CHARACTERIZATION OF POLY(ACRYLIC ACID) DIFFUSION DYNAMICS ON THE GRAFTED SURFACE OF POLY(ETHYLENE TEREPHTHALATE) FILMS BY FLUORESCENCE CORRELATION SPECTROSCOPY. ACTA ACUST UNITED AC 2011. [DOI: 10.1142/s1793048006000264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Poly(acrylic acid) (PAAc) is a commonly used polymer grafted on poly(ethylene terephthalate) films for the immobilization of bioactive molecules that directly interact with living cells or tissues for the maintenance of their viability and functionality. The diffusion property of the grafted PAAc on the surface is a critical parameter related to the density, length of polymer chains, and ionic strength of the solution. Fluorescence correlation spectroscopy (FCS) is able to measure the diffusion coefficient of fluorescent particles in solution with single molecule sensitivity and specificity. It was used as an effective tool to detect diffusion dynamics of Atto 565 molecules, a good indicator for viscosity of PAAc, in both aqueous polymer solutions and polymer grafted film surfaces immersed in solution. In this work we determine the polymer chain length under different polymerization conditions in solution and deduce the solution viscosity by FCS measurements of Atto 565 as tracer molecule. By using the same tracer on the grafted polymer films we can infer the viscosity of these grafted layers under a variety of conditions, including the PAAc chain length, the UV exposure time during polymerization, the ionic strength, and the pH value of the immersed solution.
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Affiliation(s)
- XIAOTAO PAN
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - CAILI AW
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
| | - YANAN DU
- Institute of Bioengineering and Nanotechnology, A*STAR, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
| | - HANRY YU
- Institute of Bioengineering and Nanotechnology, A*STAR, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
- Department of Physiology, National University of Singapore, 2 Medical Drive, Singapore 117597, Singapore
| | - THORSTEN WOHLAND
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
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37
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García-García JM, López L, París R, Núñez-López MT, Quijada-Garrido I, de la Peña Zarzuelo E, Garrido L. Surface modification of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer films for promoting interaction with bladder urothelial cells. J Biomed Mater Res A 2011; 100:7-17. [PMID: 21972181 DOI: 10.1002/jbm.a.33215] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 04/19/2011] [Accepted: 06/21/2011] [Indexed: 01/16/2023]
Abstract
Often bladder dysfunction and diseases lead to therapeutic interventions that require partial or complete replacement of damaged tissue. For this reason, the development of biomaterials to repair the bladder by promoting the adhesion and growth of urothelial cells is of interest. With this aim, a modified copolyester of biocompatible and biodegradable poly(3-hydroxybutyrate-co-3-hydroxyvalerate) [P(HB-co-HV)] was used as scaffold for porcine urothelial cell culture. In addition to good biocompatibility, the surface of P(HB-co-HV) substrates was modified to provide both, higher hydrophilicity and a better interaction with urothelial cells. Chemical treatments with ethylenediamine (ED) and sodium hydroxide (NaOH) led to substrate surfaces with decreasing hydrophobicity and provided functional groups that enable the grafting of bioactive molecules, such as a laminin derived YIGSR sequence. Physico-chemical properties of modified substrates were studied and compared with those of the pristine P(HB-co-HV). Urothelial cell morphology on treated substrates was studied. The results showed that focal attachment and cell-related properties were improved for peptide grafted polymer compared with both, the unmodified and functionalized copolyester.
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Affiliation(s)
- José M García-García
- Departamento de Química-Física de Polímeros, Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas-ICTP-CSIC, Juan de la Cierva 3, E-28006 Madrid, Spain
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38
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Solouk A, Cousins BG, Mirzadeh H, Seifalian AM. Application of plasma surface modification techniques to improve hemocompatibility of vascular grafts: A review. Biotechnol Appl Biochem 2011; 58:311-27. [PMID: 21995534 DOI: 10.1002/bab.50] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Accepted: 08/12/2011] [Indexed: 12/14/2022]
Affiliation(s)
- Atefeh Solouk
- Polymer Engineering Faculty, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
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Chiang EN, Dong R, Ober CK, Baird BA. Cellular responses to patterned poly(acrylic acid) brushes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:7016-7023. [PMID: 21557546 PMCID: PMC3274417 DOI: 10.1021/la200093e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We use patterned poly(acrylic acid) (PAA) polymer brushes to explore the effects of surface chemistry and topography on cell-surface interactions. Most past studies of surface topography effects on cell adhesion have focused on patterned feature sizes that are larger than the dimensions of a cell, and PAA brushes have been characterized as cell repellent. Here we report cell adhesion studies for RBL mast cells incubated on PAA brush surfaces patterned with a variety of different feature sizes. We find that when patterned at subcellular dimensions on silicon surfaces, PAA brushes that are 30 or 15 nm thick facilitate cell adhesion. This appears to be mediated by fibronectin, which is secreted by the cells, adsorbing to the brushes and then engaging cell-surface integrins. The result is detectable accumulation of plasma membrane within the brushes, and this involves cytoskeletal remodeling at the cell-surface interface. By decreasing brush thickness, we find that PAA can be 'tuned' to promote cell adhesion with down-modulated membrane accumulation. We exemplify the utility of patterned PAA brush arrays for spatially controlling the activation of cells by modifying brushes with ligands that specifically engage IgE bound to high-affinity receptors on mast cells.
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Affiliation(s)
- Ethan N. Chiang
- Department of Chemistry and Chemical Biology, Baker Laboratories, Cornell University, Ithaca, NY 14853
| | - Rong Dong
- Department of Chemistry and Chemical Biology, Baker Laboratories, Cornell University, Ithaca, NY 14853
| | - Christopher K. Ober
- Department of Materials Science and Engineering, Bard Hall, Cornell University, Ithaca, NY 14853
| | - Barbara A. Baird
- Department of Chemistry and Chemical Biology, Baker Laboratories, Cornell University, Ithaca, NY 14853
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Ping X, Wang M, Xuewu G. Surface modification of poly(ethylene terephthalate) (PET) film by gamma-ray induced grafting of poly(acrylic acid) and its application in antibacterial hybrid film. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.12.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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41
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Ikram S, Kumari M, Gupta B. Thermosensitive membranes by radiation-induced graft polymerization of N-isopropyl acrylamide/acrylic acid on polypropylene nonwoven fabric. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.08.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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42
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Cao Y, Li D, Shang C, Yang ST, Wang J, Wang X. Three-dimensional culture of human mesenchymal stem cells in a polyethylene terephthalate matrix. Biomed Mater 2010; 5:065013. [PMID: 21079281 DOI: 10.1088/1748-6041/5/6/065013] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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43
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Nakaoka R, Yamakoshi Y, Isama K, Tsuchiya T. Effects of surface chemistry prepared by self-assembled monolayers on osteoblast behavior. J Biomed Mater Res A 2010; 94:524-32. [PMID: 20186768 DOI: 10.1002/jbm.a.32714] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A surface of biomaterials is known to affect the behavior of cells after their adhesion on the surface, indicating that surface characteristics of biomaterials play an important role in cell adhesion, proliferation, and differentiation. To assess the effects of functional groups on biomaterial surface, normal human osteoblasts (NHOsts) were cultured on surfaces coated with self-assembled monolayers (SAMs) containing various functional groups, and the adhesion, proliferation, differentiation, and gap junctional intercellular communication (GJIC) of the NHOsts were investigated. In the case of SAM with terminal methyl groups (hydrophobic surface), NHOst adhesion and proliferation was less prevalent. In contrast, NHOsts were adhered well on SAMs with hydroxyl, carboxyl, amino, phosphate, and sulfate group, which are relatively hydrophilic, their proliferation and differentiation level were dependent on the type of functional groups. Especially, when they were cultured on either SAMs with phosphate or sulfate group, both their alkaline phosphate activity and the calcium deposition by them were enhanced more than those cultured on a collagen-coated dish. More interestingly, GJIC of NHOsts, which has been reported to play a role in cell differentiation as well as homeostasis of cells, were not significantly different among the SAM surfaces tested. These suggest that a specific functional group on a material surface can regulate NHOst adhesion, proliferation, and differentiation via cell-functional group interaction without influencing their homeostasis.
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Affiliation(s)
- Ryusuke Nakaoka
- Division of Medical Devices, National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan.
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Chandler-Temple AF, Wentrup-Byrne E, Griesser HJ, Jasieniak M, Whittaker AK, Grøndahl L. Comprehensive characterization of grafted expanded poly(tetrafluoroethylene) for medical applications. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:15409-15417. [PMID: 20812688 DOI: 10.1021/la1010677] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Successful implantation of any biomaterial depends on its mechanical, architectural, and surface properties. Materials with good bulk properties seldom possess the appropriate surface characteristics required for good biointegration. The present study investigates the results of surface modification of a highly porous, fully fluorinated polymeric substrate, expanded poly(tetrafluoroethylene) (ePTFE), with a view to improving the surface bioactivity and hence ultimately its biointegration. Modification involved gamma irradiation-induced graft copolymerization with the monomers monoacryloxyethyl phosphate (MAEP) and methacryloxyethyl phosphate (MOEP) in various solvent systems (water, methanol, methyl ethyl ketone, and mixtures thereof). In order to determine the penetration depth of the graft copolymer into the pores and/or the bulk of the ePTFE membranes, angle-dependent X-ray photoelectron spectroscopy (XPS) and magnetic resonance imaging (MRI) were used. It was found that the penetration depth was critically affected by the choice of monomer and solvent as well as by the technique used to remove dissolved oxygen from the grafting mixture: nitrogen degassing versus vacuum. Difficulties due to the porous nature of the membranes in establishing the lateral position of the graft copolymers were largely overcome by combining data from microattenuated total reflectance Fourier transfer infrared (μ-ATR-FTIR) mapping and time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging. Results show that the large variation in graft heterogeneity found between different samples is largely an effect of the underlying substrate and choice of monomer. The results from this study provide the necessary knowledge and experimental data to control both the graft copolymer lateral position and depth of penetration in these porous ePTFE membranes.
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Affiliation(s)
- Adrienne F Chandler-Temple
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia Q 4072, Australia
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Bhattacharyya D, Xu H, Deshmukh RR, Timmons RB, Nguyen KT. Surface chemistry and polymer film thickness effects on endothelial cell adhesion and proliferation. J Biomed Mater Res A 2010; 94:640-8. [PMID: 20213813 PMCID: PMC2892191 DOI: 10.1002/jbm.a.32713] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Adherence and growth rates of human aortic endothelial cells (HAEC) on plasma polymerized poly(vinylacetic acid) films were measured as functions of the surface density of --COOH groups and plasma deposited film thickness. Pulsed plasma polymerization was employed to produce films containing 3.6 to 9% --COOH groups, expressed as a percent of total carbon content. Endothelial cells exhibited increased cell adherence and proliferation with increasing --COOH surface densities. Additionally, and unexpectedly, cell growth was also dependent on the film thicknesses, which ranged from 25 to 200 nm. The results indicate that optimization of the functional group surface density and film thickness could produce significant enhancements in initial adhesion and subsequent growth of the HAEC cells.
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Affiliation(s)
- Dhiman Bhattacharyya
- Department of Chemistry and Biochemistry, University of Texas at Arlington, PO Box 19065, Arlington, Texas 76019-0065, USA
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Roger P, Renaudie L, Le Narvor C, Lepoittevin B, Bech L, Brogly M. Surface characterizations of poly(ethylene terephthalate) film modified by a carbohydrate-bearing photoreactive azide group. Eur Polym J 2010. [DOI: 10.1016/j.eurpolymj.2010.04.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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47
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Kai W, Iwamoto S, Akamatsu K, Nakao S, Isogai A, Iwata T. Enhanced interlayer interaction in cellulose single nanofibre and poly(l-lactic acid) layered films by plasma-initiated surface grafting of poly(acrylic acid) onto poly(l-lactic acid) films. Polym Degrad Stab 2010. [DOI: 10.1016/j.polymdegradstab.2010.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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48
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Renard E, Timbart L, Vergnol G, Langlois V. Role of carboxyl pendant groups of medium chain length poly(3-hydroxyalkanoate)s in biomedical temporary applications. J Appl Polym Sci 2010. [DOI: 10.1002/app.32041] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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49
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Graft copolymerization of methoxyacrylethyl phosphate onto expanded poly(tetrafluoroethylene) facial membranes. J Appl Polym Sci 2010. [DOI: 10.1002/app.31242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Ravichandran R, Liao S, Ng CC, Chan CK, Raghunath M, Ramakrishna S. Effects of nanotopography on stem cell phenotypes. World J Stem Cells 2009; 1:55-66. [PMID: 21607108 PMCID: PMC3097915 DOI: 10.4252/wjsc.v1.i1.55] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2009] [Revised: 10/30/2009] [Accepted: 11/06/2009] [Indexed: 02/06/2023] Open
Abstract
Stem cells are unspecialized cells that can self renew indefinitely and differentiate into several somatic cells given the correct environmental cues. In the stem cell niche, stem cell-extracellular matrix (ECM) interactions are crucial for different cellular functions, such as adhesion, proliferation, and differentiation. Recently, in addition to chemical surface modifications, the importance of nanometric scale surface topography and roughness of biomaterials has increasingly becoming recognized as a crucial factor for cell survival and host tissue acceptance in synthetic ECMs. This review describes the influence of nanotopography on stem cell phenotypes.
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Affiliation(s)
- Rajeswari Ravichandran
- Rajeswari Ravichandran, Casey K Chan, Michael Raghunath, Division of Bioengineering, Faculty of Engineering, National University of Singapore, Singapore 117574, Singapore
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