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Cai FF, Blanquer A, Costa MB, Schweiger L, Sarac B, Greer AL, Schroers J, Teichert C, Nogués C, Spieckermann F, Eckert J. Hierarchical Surface Pattern on Ni-Free Ti-Based Bulk Metallic Glass to Control Cell Interactions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310364. [PMID: 38109153 DOI: 10.1002/smll.202310364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Indexed: 12/19/2023]
Abstract
Ni-free Ti-based bulk metallic glasses (BMGs) are exciting materials for biomedical applications because of their outstanding biocompatibility and advantageous mechanical properties. The glassy nature of BMGs allows them to be shaped and patterned via thermoplastic forming (TPF). This work demonstrates the versatility of the TPF technique to create micro- and nano-patterns and hierarchical structures on Ti40Zr10Cu34Pd14Sn2 BMG. Particularly, a hierarchical structure fabricated by a two-step TPF process integrates 400 nm hexagonal close-packed protrusions on 2.5 µm square protuberances while preserving the advantageous mechanical properties from the as-cast material state. The correlations between thermal history, structure, and mechanical properties are explored. Regarding biocompatibility, Ti40Zr10Cu34Pd14Sn2 BMGs with four surface topographies (flat, micro-patterned, nano-patterned, and hierarchical-structured surfaces) are investigated using Saos-2 cell lines. Alamar Blue assay and live/dead analysis show that all tested surfaces have good cell proliferation and viability. Patterned surfaces are observed to promote the formation of longer filopodia on the edge of the cytoskeleton, leading to star-shaped and dendritic cell morphologies compared with the flat surface. In addition to potential implant applications, TPF-patterned Ti-BMGs enable a high level of order and design flexibility on the surface topography, expanding the available toolbox for studying cell behavior on rigid and ordered surfaces.
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Affiliation(s)
- Fei-Fan Cai
- Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, Leoben, A-8700, Austria
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben, A-8700, Austria
| | - Andreu Blanquer
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Bellaterra, 08193, Spain
| | - Miguel B Costa
- Department of Materials Science & Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Lukas Schweiger
- Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, Leoben, A-8700, Austria
| | - Baran Sarac
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben, A-8700, Austria
| | - A Lindsay Greer
- Department of Materials Science & Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK
| | - Jan Schroers
- Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06511, USA
| | - Christian Teichert
- Department Physics, Mechanics and Electrical Engineering, Chair of Physics, Montanuniversität Leoben, Franz-Josef-Strasse 18, Leoben, A-8700, Austria
| | - Carme Nogués
- Departament de Biologia Cel·lular, Fisiologia i Immunologia, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Bellaterra, 08193, Spain
| | - Florian Spieckermann
- Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, Leoben, A-8700, Austria
| | - Jürgen Eckert
- Department of Materials Science, Chair of Materials Physics, Montanuniversität Leoben, Jahnstraße 12, Leoben, A-8700, Austria
- Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, Leoben, A-8700, Austria
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Zhang R, Gong Y, Cai Z, Deng Y, Shi X, Pan H, Xu L, Zhang H. A composite membrane with microtopographical morphology to regulate cellular behavior for improved tissue regeneration. Acta Biomater 2023; 168:125-143. [PMID: 37414112 DOI: 10.1016/j.actbio.2023.06.046] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 06/20/2023] [Accepted: 06/28/2023] [Indexed: 07/08/2023]
Abstract
Tissue engineering scaffolds with specific surface topographical morphologies can regulate cellular behaviors and promote tissue repair. In this study, poly lactic(co-glycolic acid) (PLGA)/wool keratin composite guided tissue regeneration (GTR) membranes with three types of microtopographies (three groups each of pits, grooves and columns, thus nine groups in total) were prepared. Then, the effects of the nine groups of membranes on cell adhesion, proliferation and osteogenic differentiation were examined. The nine different membranes had clear, regular and uniform surface topographical morphologies. The 2 µm pit-structured membrane had the best effect on promoting the proliferation of bone marrow mesenchymal stem cells (BMSCs) and periodontal ligament stem cells (PDLSCs), while the 10 µm groove-structured membrane was the best for inducing osteogenic differentiation of BMSCs and PDLSCs. Then, we investigated the ectopic osteogenic, guided bone tissue regeneration and guided periodontal tissue regeneration effects of the 10 µm groove-structured membrane combined with cells or cell sheets. The 10 µm groove-structured membrane/cell complex had good compatibility and certain ectopic osteogenic effects, and the 10 µm groove-structured membrane/cell sheet complex promoted better bone repair and regeneration and periodontal tissue regeneration. Thus, the 10 µm groove-structured membrane shows potential to treat bone defects and periodontal disease. STATEMENT OF SIGNIFICANCE: PLGA/wool keratin composite GTR membranes with microcolumn, micropit and microgroove topographical morphologies were prepared by dry etching technology and the solvent casting method. The composite GTR membranes had different effects on cell behavior. The 2 µm pit-structured membrane had the best effect on promoting the proliferation of rabbit BMSCs and PDLSCs and the 10 µm groove-structured membrane was the best for inducing the osteogenic differentiation of BMSCs and PDLSCs. The combined application of a 10 µm groove-structured membrane and PDLSC sheet can promote better bone repair and regeneration as well as periodontal tissue regeneration. Our findings may have significant potential for guiding the design of future GTR membranes with topographical morphologies and clinical applications of the groove-structured membrane/cell sheet complex.
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Affiliation(s)
- Rui Zhang
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; General Hospital of Ningxia Medical University, Yinchuan 750004, China
| | - Yuwei Gong
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; Ningxia Province Key Laboratory of Oral Diseases Research, Ningxia Medical University, Yinchuan 750004, China
| | - Zhuoyan Cai
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; Sinopharm Chongqing Southwest Aluminum Hospital, Chongqing 401326, China
| | - Yan Deng
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; First People's Hospital of Yuhang District, Hangzhou 311100, China
| | - Xingyan Shi
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; Ningxia Province Key Laboratory of Oral Diseases Research, Ningxia Medical University, Yinchuan 750004, China
| | - Hongyue Pan
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China
| | - Lihua Xu
- Department of General Medicine, First Affiliated Hospital, Wenzhou Medical University, Wenzhou 325000, China.
| | - Hualin Zhang
- Department of Prosthodontics, College of Stomatology, Ningxia Medical University, Yinchuan 750004, China; Ningxia Province Key Laboratory of Oral Diseases Research, Ningxia Medical University, Yinchuan 750004, China.
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3
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Chen CW, Chen SH, Huang CF, Chen JK. Designable Poly(methacrylic Acid)/Silver Cluster Ring Arrays as Reflectance Spectroscopy-Based Biosensors for Label-Free Plague Diagnosis. Polymers (Basel) 2023; 15:polym15081919. [PMID: 37112066 PMCID: PMC10143817 DOI: 10.3390/polym15081919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/12/2023] [Accepted: 04/13/2023] [Indexed: 04/29/2023] Open
Abstract
A hole array was fabricated via photolithography to wet the bottoms of holes using oxygen plasma. Amide-terminated silane, a water immiscible compound before hydrolysis, was evaporated for deposition on the plasma-treated hole template surface. The silane compound was hydrolyzed along the edges of circular sides of the hole bottom to form a ring of an initiator after halogenation. Poly(methacrylic acid) (PMAA) was grafted from the ring of the initiator to attract Ag clusters (AgCs) as AgC-PMAA hybrid ring (SPHR) arrays via alternate phase transition cycles. The SPHR arrays were modified with a Yersinia pestis antibody (abY) to detect the antigen of Yersinia pestis (agY) for plague diagnosis. The binding of the agY onto the abY-anchored SPHR array resulted in a geometrical change from a ring to a two-humped structure. The reflectance spectra could be used to analyze the AgC attachment and the agY binding onto the abY-anchored SPHR array. The linear range between the wavelength shift and agY concentration from 30 to 270 pg mL-1 was established to obtain the detection limit of ~12.3 pg mL-1. Our proposed method provides a novel pathway to efficiently fabricate a ring array with a scale of less than 100 nm, which demonstrates excellent performance in preclinical trials.
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Affiliation(s)
- Chih-Wei Chen
- Division of Neurosurgery, Department of Surgery, Chi Mei Medical Center, Tainan 710, Taiwan
- Department of Occupational Safety and Health, Institute of Industrial Safety and Disaster Prevention, College of Sustainable Environment, Chia Nan University of Pharmacy and Science, Tainan 717, Taiwan
- Department of Materials and Science Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Road, Taipei 106, Taiwan
| | - Shih-Hsun Chen
- Department of Mechanical Engineering, National Yang Ming Chiao Tung University, No. 1001, Daxue Rd. East Dist., Hsinchu City 300093, Taiwan
| | - Chih-Feng Huang
- Department of Chemical Engineering, i-Center for Advanced Science and Technology (iCAST), National Chung Hsing University, Taichung 40227, Taiwan
| | - Jem-Kun Chen
- Department of Materials and Science Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Road, Taipei 106, Taiwan
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He Y, Gao Y, Ma Q, Zhang X, Zhang Y, Song W. Nanotopographical cues for regulation of macrophages and osteoclasts: emerging opportunities for osseointegration. J Nanobiotechnology 2022; 20:510. [PMID: 36463225 PMCID: PMC9719660 DOI: 10.1186/s12951-022-01721-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/22/2022] [Indexed: 12/05/2022] Open
Abstract
Nanotopographical cues of bone implant surface has direct influences on various cell types during the establishment of osseointegration, a prerequisite of implant bear-loading. Given the important roles of monocyte/macrophage lineage cells in bone regeneration and remodeling, the regulation of nanotopographies on macrophages and osteoclasts has arisen considerable attentions recently. However, compared to osteoblastic cells, how nanotopographies regulate macrophages and osteoclasts has not been properly summarized. In this review, the roles and interactions of macrophages, osteoclasts and osteoblasts at different stages of bone healing is firstly presented. Then, the diversity and preparation methods of nanotopographies are summarized. Special attentions are paid to the regulation characterizations of nanotopographies on macrophages polarization and osteoclast differentiation, as well as the focal adhesion-cytoskeleton mediated mechanism. Finally, an outlook is indicated of coordinating nanotopographies, macrophages and osteoclasts to achieve better osseointegration. These comprehensive discussions may not only help to guide the optimization of bone implant surface nanostructures, but also provide an enlightenment to the osteoimmune response to external implant.
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Affiliation(s)
- Yide He
- grid.233520.50000 0004 1761 4404State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, 710032 China
| | - Yuanxue Gao
- grid.233520.50000 0004 1761 4404State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, 710032 China
| | - Qianli Ma
- grid.5510.10000 0004 1936 8921Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway
| | - Xige Zhang
- grid.233520.50000 0004 1761 4404State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Shaanxi Xi’an, 710032 China
| | - Yumei Zhang
- grid.233520.50000 0004 1761 4404State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, 710032 China
| | - Wen Song
- grid.233520.50000 0004 1761 4404State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Oral Diseases, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi’an, 710032 China
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5
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Zhu M, Zhang R, Mao Z, Fang J, Ren F. Topographical biointerface regulating cellular functions for bone tissue engineering. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Mingyu Zhu
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Rui Zhang
- Department of Prosthodontics Stomatology Center Peking University Shenzhen Hospital Shenzhen Guangdong China
| | - Zhixiang Mao
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Ju Fang
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
| | - Fuzeng Ren
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen Guangdong China
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6
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Zhang X, Zhang T, Liu B, Zhang Y, Ji Z, Wang X. Effects of Biomimetic Micropatterned Surfaces on the Adhesion and Morphology of Cervical Cancer Cells. ACS OMEGA 2022; 7:19913-19919. [PMID: 35722016 PMCID: PMC9202008 DOI: 10.1021/acsomega.2c01703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
It has been demonstrated that micropatterned surfaces have an important influence on modulating cellular behavior. In recent years, with the rapid development of microfabrication techniques and in-depth study of nature, an increasing number of patterned structures imitating natural organisms have been successfully fabricated and widely evaluated. However, there are only a few reports about biomimetic patterned microstructures in biologically related fields. In our work, micropatterned polydimethylsiloxane (PDMS) was fabricated by mimicking the surface microstructures of natural Trifolium and Parthenocissus tricuspidata leaves using the template duplication method. The interactions between the two types of biomimetic micro-PDMS surfaces and two kinds of human cervical cancer cells (HeLa and SiHa) were investigated. HeLa and SiHa cells cultured on the two micropatterned PDMS samples exhibited more stretchable morphology, higher diffusion, and a much lower nuclear/cytoplasmic ratio than those cultured on flat PDMS surfaces, indicating a higher adhesion area of the cells. Both of the micro-PDMS substrates were found to induce significantly different morphological changes between HeLa and SiHa cells. This suggests that the micropatterned structure affects cell adhesion and morphology correlated with their surface geometric structure and roughness. The results reveal that biomimetic micropatterned surfaces from natural leaves significantly regulate the morphology and adhesion behavior of cervical cancer cells and are believed to be the new platforms for investigating the interaction between cells and substrates.
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Affiliation(s)
- Xiaohui Zhang
- School
of Stomatology, Key Laboratory of Oral Diseases of Gansu Province, Northwest Minzu University, Lanzhou 730000, China
| | - Ting Zhang
- School/Hospital
of Stomatology Lanzhou University, Lanzhou 730000, China
| | - Bin Liu
- School/Hospital
of Stomatology Lanzhou University, Lanzhou 730000, China
| | - Yun Zhang
- Lanzhou
Stomatology Hospital, Lanzhou 730000, China
| | - Zhongying Ji
- State
Key Laboratory of Solid Lubrication, , Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- Yantai
Zhongke Research Institute of Advanced Materials and Green Chemical
Engineering, Yantai 264006, China
| | - Xiaolong Wang
- State
Key Laboratory of Solid Lubrication, , Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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7
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Accelerated Endothelialization of Nanofibrous Scaffolds for Biomimetic Cardiovascular Implants. MATERIALS 2022; 15:ma15062014. [PMID: 35329466 PMCID: PMC8955317 DOI: 10.3390/ma15062014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/03/2022] [Accepted: 03/07/2022] [Indexed: 02/04/2023]
Abstract
Nanofiber nonwovens are highly promising to serve as biomimetic scaffolds for pioneering cardiac implants such as drug-eluting stent systems or heart valve prosthetics. For successful implant integration, rapid and homogeneous endothelialization is of utmost importance as it forms a hemocompatible surface. This study aims at physicochemical and biological evaluation of various electrospun polymer scaffolds, made of FDA approved medical-grade plastics. Human endothelial cells (EA.hy926) were examined for cell attachment, morphology, viability, as well as actin and PECAM 1 expression. The appraisal of the untreated poly-L-lactide (PLLA L210), poly-ε-caprolactone (PCL) and polyamide-6 (PA-6) nonwovens shows that the hydrophilicity (water contact angle > 80°) and surface free energy (<60 mN/m) is mostly insufficient for rapid cell colonization. Therefore, modification of the surface tension of nonpolar polymer scaffolds by plasma energy was initiated, leading to more than 60% increased wettability and improved colonization. Additionally, NH3-plasma surface functionalization resulted in a more physiological localization of cell−cell contact markers, promoting endothelialization on all polymeric surfaces, while fiber diameter remained unaltered. Our data indicates that hydrophobic nonwovens are often insufficient to mimic the native extracellular matrix but also that they can be easily adapted by targeted post-processing steps such as plasma treatment. The results achieved increase the understanding of cell−implant interactions of nanostructured polymer-based biomaterial surfaces in blood contact while also advocating for plasma technology to increase the surface energy of nonpolar biostable, as well as biodegradable polymer scaffolds. Thus, we highlight the potential of plasma-activated electrospun polymer scaffolds for the development of advanced cardiac implants.
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Zhang WC, Zheng ML, Liu J, Jin F, Dong XZ, Guo M, Li T. Modulation of Cell Behavior by 3D Biocompatible Hydrogel Microscaffolds with Precise Configuration. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2325. [PMID: 34578641 PMCID: PMC8469000 DOI: 10.3390/nano11092325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 08/25/2021] [Accepted: 09/03/2021] [Indexed: 11/17/2022]
Abstract
Three-dimensional (3D) micronano structures have attracted much attention in tissue engineering since they can better simulate the microenvironment in vivo. Two-photon polymerization (TPP) technique provides a powerful tool for printing arbitrary 3D structures with high precision. Here, the desired 3D biocompatible hydrogel microscaffolds (3D microscaffold) with structure design referring to fibroblasts L929 have been fabricated by TPP technology, particularly considering the relative size of cell seed (cell suspension), spread cell, strut and strut spacing of scaffold. Modulation of the cell behavior has been studied by adjusting the porosity from 69.7% to 89.3%. The cell culture experiment results reveal that the obvious modulation of F-actin can be achieved by using the 3D microscaffold. Moreover, cells on 3D microscaffolds exhibit more lamellipodia than those on 2D substrates, and thus resulting in a more complicated 3D shape of single cell and increased cell surface. 3D distribution can be also achieved by employing the designed 3D microscaffold, which would effectively improve the efficiency of information exchange and material transfer. The proposed protocol enables us to better understand the cell behavior in vivo, which would provide high prospects for the further application in tissue engineering.
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Affiliation(s)
- Wei-Cai Zhang
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
- School of Future Technologies, Yanqihu Campus, University of Chinese Academy of Sciences, Beijing 101407, China
| | - Mei-Ling Zheng
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
- School of Future Technologies, Yanqihu Campus, University of Chinese Academy of Sciences, Beijing 101407, China
| | - Jie Liu
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
| | - Feng Jin
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
| | - Xian-Zi Dong
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
| | - Min Guo
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
- School of Future Technologies, Yanqihu Campus, University of Chinese Academy of Sciences, Beijing 101407, China
| | - Teng Li
- Laboratory of Organic Nano Photonics and CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No. 29, Zhongguancun East Road, Beijing 100190, China; (W.-C.Z.); (J.L.); (F.J.); (X.-Z.D.); (M.G.); (T.L.)
- School of Future Technologies, Yanqihu Campus, University of Chinese Academy of Sciences, Beijing 101407, China
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9
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Tchobanian A, Ceyssens F, Cóndor Salgado M, Van Oosterwyck H, Fardim P. Patterned dextran ester films as a tailorable cell culture platform. Carbohydr Polym 2021; 252:117183. [PMID: 33183630 DOI: 10.1016/j.carbpol.2020.117183] [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: 07/28/2020] [Revised: 09/24/2020] [Accepted: 09/29/2020] [Indexed: 01/22/2023]
Abstract
The elucidation of cell-surface interactions and the development of model platforms to help uncover their underlying mechanisms remains vital to the design of effective biomaterials. To this end, dextran palmitates with varying degrees of substitution were synthesised with a multipurpose functionality: an ability to modulate surface energy through surface chemistry, and an ideal thermal behaviour for patterning. Herein, dextran palmitate films are produced by spin coating, and patterned by thermal nanoimprint lithography with nano-to-microscale topographies. These films of moderately hydrophobic polysaccharide esters with low nanoscale roughness performed as well as fibronectin coatings in the culture of bovine aortic endothelial cells. Upon patterning, they display distinct regions of roughness, restricting cell adhesion to the smoothest surfaces, while guiding multicellular arrangements in the patterned topographies. The development of biomaterial interfaces through topochemical fabrication such as this could prove useful in understanding protein and cell-surface interactions.
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Affiliation(s)
- Armen Tchobanian
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.
| | - Frederik Ceyssens
- Department of Electrical Engineering, ESAT-MICAS, KU Leuven, Kasteelpark Arenberg 10, B-3001 Heverlee, Belgium.
| | - Mar Cóndor Salgado
- Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300, B-3001 Heverlee, Belgium.
| | - Hans Van Oosterwyck
- Department of Mechanical Engineering, KU Leuven, Celestijnenlaan 300, B-3001 Heverlee, Belgium; Prometheus Division of Skeletal Tissue Engineering, KU Leuven, Herestraat 49 - bus 813, Leuven, Belgium.
| | - Pedro Fardim
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium.
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10
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The Anchorage of Bone Cells onto an Yttria-Stabilized Zirconia Surface with Mild Nano-Micro Curved Profiles. Dent J (Basel) 2020; 8:dj8040127. [PMID: 33182602 PMCID: PMC7712018 DOI: 10.3390/dj8040127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/04/2020] [Accepted: 11/06/2020] [Indexed: 01/16/2023] Open
Abstract
The high biocompatibility, good mechanical properties, and perfect esthetics of ceramic dental materials motivate investigation into their suitability as an endosseous implant. Osseointegration at the interface between bone and implant surface, which is a criterion for dental implant success, is dependent on surface chemistry and topography. We found out earlier that osteoblasts on sharp-edged micro-topographies revealed an impaired cell phenotype and function and the cells attempted to phagocytize these spiky elevations in vitro. Therefore, micro-structured implants used in dental surgery should avoid any spiky topography on their surface. The sandblasted, acid-etched, and heat-treated yttria-stabilized zirconia (cer.face®14) surface was characterized by scanning electron microscopy and energy dispersive X-ray. In vitro studies with human MG-63 osteoblasts focused on cell attachment and intracellular stress level. The cer.face 14 surface featured a landscape with nano-micro hills that was most sinusoidal-shaped. The mildly curved profile proved to be a suitable material for cell anchorage. MG-63 cells on cer.face 14 showed a very low reactive oxygen species (ROS) generation similar to that on the extracellular matrix protein collagen I (Col). Intracellular adenosine triphosphate (ATP) levels were comparable to Col. Ceramic cer.face 14, with its sinusoidal-shaped surface structure, facilitates cell anchorage and prevents cell stress.
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11
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Staehlke S, Haack F, Waldner AC, Koczan D, Moerke C, Mueller P, Uhrmacher AM, Nebe JB. ROS Dependent Wnt/β-Catenin Pathway and Its Regulation on Defined Micro-Pillars-A Combined In Vitro and In Silico Study. Cells 2020; 9:E1784. [PMID: 32726949 PMCID: PMC7464713 DOI: 10.3390/cells9081784] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/17/2020] [Accepted: 07/21/2020] [Indexed: 12/15/2022] Open
Abstract
The physico-chemical surface design of implants influences the surrounding cells. Osteoblasts on sharp-edged micro-topographies revealed an impaired cell phenotype, function and Ca2+ mobilization. The influence of edges and ridges on the Wnt/β-catenin pathway in combination with the cells' stress response has not been clear. Therefore, MG-63 osteoblasts were studied on defined titanium-coated micro-pillars (5 × 5 × 5 µm) in vitro and in silico. MG-63s on micro-pillars indicated an activated state of the Wnt/β-catenin pathway. The β-catenin protein accumulated in the cytosol and translocated into the nucleus. Gene profiling indicated an antagonism mechanism of the transcriptional activity of β-catenin due to an increased expression of inhibitors like ICAT (inhibitor of β-catenin and transcription factor-4). Cells on pillars produced a significant reactive oxygen species (ROS) amount after 1 and 24 h. In silico analyses provided a detailed view on how transcriptional activity of Wnt signaling is coordinated in response to the oxidative stress induced by the micro-topography. Based on a coordinated expression of regulatory elements of the Wnt/β-catenin pathway, MG-63s are able to cope with an increased accumulation of β-catenin on micro-pillars and suppress an unintended target gene expression. Further, β-catenin may be diverted into other signaling pathways to support defense mechanisms against ROS.
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Affiliation(s)
- Susanne Staehlke
- Department of Cell Biology, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany; (A.-C.W.); (C.M.); (P.M.); (J.B.N.)
| | - Fiete Haack
- Modeling and Simulation Group, Institute for Visual and Analytic Computing, University of Rostock, Albert-Einstein-Str. 22, 18059 Rostock, Germany; (F.H.); (A.M.U.)
| | - Anna-Christin Waldner
- Department of Cell Biology, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany; (A.-C.W.); (C.M.); (P.M.); (J.B.N.)
| | - Dirk Koczan
- Institute for Immunology, Core Facility for Microarray Analysis, Rostock University Medical Center, Schillingallee 70, 18057 Rostock, Germany;
| | - Caroline Moerke
- Department of Cell Biology, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany; (A.-C.W.); (C.M.); (P.M.); (J.B.N.)
| | - Petra Mueller
- Department of Cell Biology, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany; (A.-C.W.); (C.M.); (P.M.); (J.B.N.)
| | - Adelinde M. Uhrmacher
- Modeling and Simulation Group, Institute for Visual and Analytic Computing, University of Rostock, Albert-Einstein-Str. 22, 18059 Rostock, Germany; (F.H.); (A.M.U.)
- Department Science and Technology of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
| | - J. Barbara Nebe
- Department of Cell Biology, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany; (A.-C.W.); (C.M.); (P.M.); (J.B.N.)
- Department Science and Technology of Life, Light and Matter, University of Rostock, Albert-Einstein-Str. 25, 18059 Rostock, Germany
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12
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Zhao C, Song X, Lu X. Directional Osteo-Differentiation Effect of hADSCs on Nanotopographical Self-Assembled Polystyrene Nanopit Surfaces. Int J Nanomedicine 2020; 15:3281-3290. [PMID: 32440124 PMCID: PMC7217320 DOI: 10.2147/ijn.s240300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 03/10/2020] [Indexed: 11/23/2022] Open
Abstract
Introduction Cells exhibit high sensitivity and a diverse response to the nanotopography of the extracellular matrix, thereby endowing materials with instructive performances formerly reserved for growth factors. This finding leads to opportunities for improvement. However, the interplay between the topographical surface and cell behaviors remains incompletely understood. Methods In the present study, we showed nanosurfaces with various dimensions of nanopits (200–750 nm) fabricated by self-assembling polystyrene (PS) nanospheres. Human adipose-derived stem cell behaviors, such as cell morphology, adhesion, cytoskeleton contractility, proliferation, and differentiation, were investigated on the prepared PS nanopit surface. Results The osteogenic differentiation can be enhanced by nanopits with a diameter of 300–400 nm. Discussion The present study provided exciting new avenues to investigate cellular responses to well-defined nanoscale topographic features, which could further guide bone tissue engineering and stem cell clinical research. The capability to control developing biomaterials mimicking nanotopographic surfaces promoted functional tissue engineering, such as artificial joint replacement, bone repair, and dental applications.
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Affiliation(s)
- Changhong Zhao
- School of Life Sciences and Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Xuebin Song
- School of Life Sciences and Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, People's Republic of China
| | - Xiaoyuan Lu
- College of Medical Engineering, Xinxiang Medical University, Henan 453003, People's Republic of China
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13
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Ghezzi B, Lagonegro P, Fukata N, Parisi L, Calestani D, Galli C, Salviati G, Macaluso GM, Rossi F. Sub-Micropillar Spacing Modulates the Spatial Arrangement of Mouse MC3T3-E1 Osteoblastic Cells. NANOMATERIALS 2019; 9:nano9121701. [PMID: 31795174 PMCID: PMC6955749 DOI: 10.3390/nano9121701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/22/2019] [Accepted: 11/25/2019] [Indexed: 12/11/2022]
Abstract
Surface topography is one of the main factors controlling cell responses on implanted devices and a proper definition of the characteristics that optimize cell behavior may be crucial to improve the clinical performances of these implants. Substrate geometry is known to affect cell shape, as cells try to optimize their adhesion by adapting to the irregularities beneath, and this in turn profoundly affects their activity. In the present study, we cultured murine calvaria MC3T3-E1 cells on surfaces with pillars arranged as hexagons with two different spacings and observed their morphology during adhesion and growth. Cells on these highly ordered substrates attached and proliferated effectively, showing a marked preference for minimizing the inter-pillar distance, by following specific pathways across adjacent pillars and displaying consistent morphological modules. Moreover, cell behavior appeared to follow tightly controlled patterns of extracellular protein secretion, which preceded and matched cells and, on a sub-cellular level, cytoplasmic orientation. Taken together, these results outline the close integration of surface features, extracellular proteins alignment and cell arrangement, and provide clues on how to control and direct cell spatial order and cell morphology by simply acting on inter-pillar spacing.
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Affiliation(s)
- Benedetta Ghezzi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- Correspondence:
| | - Paola Lagonegro
- ISMAC-CNR, Institute for macromolecular studies, Via Corti, 12, 20133 Milano, Italy;
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Naoki Fukata
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan;
- Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8573, Japan
| | - Ludovica Parisi
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- Labör für Orale Molekularbiologie, Klinik für Kieferorthopädie, Zahnmedizinische Klinik, Universität Bern, Freiburgstrasse 7, 3008 Bern, Switzerland
| | - Davide Calestani
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Carlo Galli
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
| | - Giancarlo Salviati
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Guido M. Macaluso
- Centro Universitario di Odontoiatria, Università di Parma, Via Gramsci 14, 43126 Parma, Italy; (L.P.); (G.M.M.)
- Dipartimento di Medicina e Chirurgia, Università di Parma, Via Gramsci 14, 43126 Parma, Italy;
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
| | - Francesca Rossi
- IMEM-CNR, Institute of Materials for Electronics and Magnetism, Parco Area delle Scienze, 37/A, 43124 Parma, Italy; (D.C.); (G.S.); (F.R.)
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14
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Zhu M, Ye H, Fang J, Zhong C, Yao J, Park J, Lu X, Ren F. Engineering High-Resolution Micropatterns Directly onto Titanium with Optimized Contact Guidance to Promote Osteogenic Differentiation and Bone Regeneration. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43888-43901. [PMID: 31680521 DOI: 10.1021/acsami.9b16050] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Topographical cues play an important role in directing cell behavior, and thus, extensive research efforts have been devoted to fabrication of surface patterns and exploring the contact guidance effect. However, engineering high-resolution micropatterns directly onto metallic implants remains a grand challenge. Moreover, there still lacks evidence that allows translation of in vitro screening to in vivo tissue response. Herein, we demonstrate a fast, cost-effective, and feasible approach to the precise fabrication of shape- and size-controlled micropatterns on titanium substrates using a combination of photolithography and inductively coupled plasma-based dry etching. A titanium TopoChip containing 34 microgrooved patterns with varying geometry parameters and a flat surface as the control was designed for a high-throughput in vitro study of the contact guidance of osteoblasts. The correlation between the surface pattern dimensions, cell morphological characteristics, proliferation, and osteogenic marker expression was systematically investigated in vitro. Furthermore, the surface with the highest osteogenic potential in vitro along with representative controls was evaluated in rat cranial defect models. The results show that microgrooved pattern parameters have almost no effect on osteoblast proliferation but significantly regulate the cell morphology, orientation, focal adhesion (FA) formation, and osteogenic differentiation in vitro. In particular, a specific groove pattern with a ridge width of 3 μm, groove width of 7 μm, and depth of 2 μm can most effectively align the cells through regulating the distribution of FAs, resulting in an anisotropic actin cytoskeleton, and thereby promoting osteogenic differentiation. In vivo, microcomputed tomography and histological analyses show that the optimized pattern can apparently stimulate new bone formation. This study not only offers a microfabrication method that can be extended to fabricate various shape- and size-controlled micropatterns on titanium alloys but also provides insight into the surface structure design of orthopedic and dental implants for enhanced bone regeneration.
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Affiliation(s)
| | | | | | - Chuanxin Zhong
- Institute for Advancing Translational Medicine in Bone and Joint Diseases, School of Chinese Medicine , Hong Kong Baptist University , Kowloon Tong , Hong Kong 999077 , China
| | | | | | - Xiong Lu
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering , Southwest Jiaotong University , Chengdu , Sichuan 610031, China
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15
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Effect of oblique polymer pillars on spreading and elongation of rat mesenchymal stem cells. Colloids Surf B Biointerfaces 2019; 183:110485. [PMID: 31499453 DOI: 10.1016/j.colsurfb.2019.110485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 08/28/2019] [Accepted: 09/01/2019] [Indexed: 11/23/2022]
Abstract
Stiffness and anisotropy of culture substrates are important factors influencing the cell behavior and their responses to external stimuli. Herein, we report a fabrication method of oblique polymer pillars which allow modulating both stiffness and anisotropy of the substrate for spreading and elongation studies of Rat Mesenchymal Stem Cells (RMSCs). Poly (Lactic-co-Glycolic Acid) (PLGA) has been chosen to produce micro-pillars of different heights and different pitches using a combined method of soft-lithography and hot embossing. The stiffness of such pillar substrates varies over a large range so that RMSCs show effectively different spreading behaviors which are also sensitive to the inclining angle of the pillars. Our results showed that with the increase of the pillar height the area of cell spreading decreases but the cell elongation aspect ratio increases. Moreover, cells preferentially elongate along the direction perpendicular to that of the pillars' inclining, which is in agreement with the calculated anisotropy of the pillar substrate stiffness.
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16
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Chiral geometry regulates stem cell fate and activity. Biomaterials 2019; 222:119456. [DOI: 10.1016/j.biomaterials.2019.119456] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/11/2019] [Accepted: 08/23/2019] [Indexed: 02/06/2023]
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17
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Biomimetic Properties of Force-Spun PHBV Membranes Functionalised with Collagen as Substrates for Biomedical Application. COATINGS 2019. [DOI: 10.3390/coatings9060350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The force-spinning process parameters (i.e., spin speed, spinneret-collector distance, and polymer concentration), optimised and characterised in previous work by this group, allowed the rapid fabrication of large quantities of high surface area poly(3-hydroxybutyric acid-co-3-hydroxyvaleric acid) (PHBV) polymeric fibre membranes. This paper examined the potential application for force-spun PHBV fibres functionalised with type I collagen for tissue regeneration applications. PHBV fibre scaffolds provide a biologically suitable substrate to guide the regeneration of dermal tissues, however, have poor cellular adhesion properties. The grafting of collagen type-I to PHBV fibres demonstrated improved cell adhesion and growth in Neo-NHDF (neonatal human dermal fibroblasts) fibroblasts. The examination of fibre morphology, thermal properties, collagen content, and degradability was used to contrast the physicochemical properties of the PHBV and PHBV-Collagen fibres. Biodegradation models using phosphate buffered saline determined there was no appreciable change in mass over the course of 6 weeks; a Sirius Red assay was performed on degraded samples, showing no change in the quantity of collagen. Cell metabolism studies showed an increase in cell metabolism on conjugated samples after three and 7 days. In addition, in vitro cytocompatibility studies demonstrated superior cell activity and adhesion on conjugated samples over 7 days.
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18
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Hu Y, Liu H, Zhou X, Pan H, Wu X, Abidi N, Zhu Y, Wang J. Surface engineering of spongy bacterial cellulose via constructing crossed groove/column micropattern by low-energy CO 2 laser photolithography toward scar-free wound healing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:333-343. [PMID: 30889707 DOI: 10.1016/j.msec.2019.01.116] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 12/13/2018] [Accepted: 01/25/2019] [Indexed: 11/16/2022]
Abstract
Bacterial cellulose (BC) is a bio-derived polymer, and it has been considered as an excellent candidate material for tissue engineering. In this study, a crossed groove/column micropattern was constructed on spongy, porous BC using low-energy CO2 laser photolithography. Applying the targeted immobilization of a tetrapeptide consisting of Arginine-Glycine-Aspartic acid-Serine (H-Arg-Gly-Asp-Ser-OH, RGDS) as a fibronectin onto the column platform surface, the resulting micropatterned BC (RGDS-MPBC) exhibited dual affinities to fibroblasts and collagen. Material characterization of RGDS-MPBC revealed that the micropattern was built by the column part with size of ~100 × 100 μm wide and ~100 μm deep, and the groove part with size of ~150 μm wide. Hydrating the MPBC did not result in the collapse of the integrity of the micropattern, suggesting its potential application in a highly hydrated wound environment. Cell culture assays revealed that the RGDS-MPBC exhibited an improved cytotoxicity to mouse fibroblasts L929, as compared to the pristine BC. Meanwhile, it was observed that the RGDS-MPBC was able to guide the ordered aggregation of human skin fibroblast (HSF) cells on the column platform surface, and no HSF cells were found in the groove channels. Over time, it was found that a dense network of collagen was gradually established across the groove channels. Furthermore, the in-vivo animal study preliminarily demonstrated the scar-free healing potential of the micropatterned BC materials. Therefore, this RGDS-MPBC material exhibited its advantages in guiding cell migration and collagen distribution, which could present a prospect in the establishment of "basket-woven" organization of collagen in normal skin tissue against the formation of dense, parallel aggregation of collagen fibers in scar tissue toward scar-free wound healing outcome.
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Affiliation(s)
- Yang Hu
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China; Fiber and Biopolymer Research Institute, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79403, USA.
| | - Haiyan Liu
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China; School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Xin Zhou
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Haobo Pan
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Xiuping Wu
- School and Hospital of Stomatology, Shanxi Medical University, Taiyuan, Shanxi 030001, China
| | - Noureddine Abidi
- Fiber and Biopolymer Research Institute, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79403, USA
| | - Yongjun Zhu
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Jinhui Wang
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, Guangdong 518055, China
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19
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Morán MC, Ruano G, Cirisano F, Ferrari M. Mammalian cell viability on hydrophobic and superhydrophobic fabrics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:241-247. [PMID: 30889696 DOI: 10.1016/j.msec.2019.01.088] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/28/2018] [Accepted: 01/18/2019] [Indexed: 11/18/2022]
Abstract
Surface properties like hydrophobicity and morphology of the substrate are essential for cell proliferation affecting its growth, survival and also for its communication with other cells on fabrics. The combination of low surface energy and a specific surface morphology (micro/nano-roughness) leads to significantly less wettable surfaces, known as superhydrophobic characterized by high contact angle above 150° and a very small hysteresis. Such high water repellent coatings feature small area available to be exploited in many applications where interactions with aqueous environment are strongly to be avoided. In this work, the authors have investigated the influence of coating polyester fabric at different degree of hydrophobicity by mixed organic-inorganic coating with moderated to highly water repellence. Depending on the coating composition and structure, the hydrophobicity of the fabric can be finely modulated by an easy-to-prepare method applicable to commercial, low cost fabric substrates providing advanced performance. In vitro experiments have been performed in order to establish the influence of surface modification on adhesion of representative model mammalian cell lines such as 3T3 fibroblasts, HaCaT keratinocytes and HeLa epithelial carcinoma cells. The obtained results suggested that, in addition to the chemistry and morphology of the coating, the characteristics of the substrate are important parameters on the final cell viabilities.
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Affiliation(s)
- M Carmen Morán
- Departament de Bioquímica i Fisiologia, Secció de Fisiologia - Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain; Institut de Nanociència i Nanotecnologia - IN(2)UB, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain.
| | - Guillem Ruano
- Departament de Bioquímica i Fisiologia, Secció de Fisiologia - Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Avda. Joan XXIII s/n, 08028 Barcelona, Spain
| | - Francesca Cirisano
- CNR-ICMATE Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia, via De Marini, 6, 16149 Genova, Italy
| | - Michele Ferrari
- CNR-ICMATE Istituto di Chimica della Materia Condensata e di Tecnologie per l'Energia, via De Marini, 6, 16149 Genova, Italy.
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20
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Truong D, Bahls CR, Nebe B, van Rienen U. Simulation of actin distribution of osteoblasts on titanium pillar arrays using a bio-chemo-mechanical model. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2018; 34:e3097. [PMID: 29736927 PMCID: PMC6099319 DOI: 10.1002/cnm.3097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 04/03/2018] [Accepted: 04/13/2018] [Indexed: 06/08/2023]
Abstract
A numerical model for the adhesion of osteoblasts on titanium micropillar structures is suggested, and a function representing the concentration level of the adhesion on the pillars is constructed based on experimental observation. The introduction of this function helps a well-known bio-chemo-mechanical model to better predict the formation of actin in osteoblasts when they are laid on arrays of titanium micro-pillars of various size attached to silicon substrate. A parameter study suggests that each pillar is associated with a different pattern of adhesion. Our finding emphasises a capability of the bio-chemo-mechanical model that it can well explain the strong influence of the boundary condition on the formation of actin within the cells.
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Affiliation(s)
- D. Truong
- Institute of General Electrical EngineeringUniversity of RostockAlbert‐Einstein‐Str. 2Rostock18059Germany
| | - C. R. Bahls
- Institute of General Electrical EngineeringUniversity of RostockAlbert‐Einstein‐Str. 2Rostock18059Germany
| | - B. Nebe
- Department of Cell BiologyUniversity Medical Center RostockSchillingallee 69Rostock18057Germany
| | - U. van Rienen
- Institute of General Electrical EngineeringUniversity of RostockAlbert‐Einstein‐Str. 2Rostock18059Germany
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21
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Gui N, Xu W, Myers DE, Shukla R, Tang HP, Qian M. The effect of ordered and partially ordered surface topography on bone cell responses: a review. Biomater Sci 2018; 6:250-264. [DOI: 10.1039/c7bm01016h] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Current understanding of the role of ordered and partially ordered surface topography in bone cell responses for bone implant design.
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Affiliation(s)
- N. Gui
- Centre for Additive Manufacturing
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - W. Xu
- Department of Engineering
- Macquarie University
- Sydney
- Australia
| | - D. E. Myers
- Australian Institute for Musculoskeletal Science
- Victoria University and University of Melbourne
- Australia
- College of Health and Biomedicine
- Victoria University
| | - R. Shukla
- Nanobiotechnology Research Laboratory and Centre for Advanced Materials & Industrial Chemistry
- School of Science
- RMIT University
- Melbourne
- Australia
| | - H. P. Tang
- State Key Laboratory of Porous Metal Materials
- Northwest Institute for Nonferrous Metal Research
- and Xi'an Sailong Metal Materials Co. Ltd
- Xi'an 710016
- China
| | - M. Qian
- Centre for Additive Manufacturing
- School of Engineering
- RMIT University
- Melbourne
- Australia
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22
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Bahls CR, Truong D, Rienen UV. Semi-analytical representation of the activation level in stress fibre directions as alternative to the angular representation in the bio-chemo-mechanical model for cell contractility. J Mech Behav Biomed Mater 2017; 77:527-533. [PMID: 29049973 DOI: 10.1016/j.jmbbm.2017.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 10/04/2017] [Accepted: 10/08/2017] [Indexed: 11/25/2022]
Abstract
The bio-chemo-mechanical model has many applications in modelling cell contractility. In simulations this model usually is coupled to the continuum mechanics of the cell by defining a large number of directions for stress fibres at each point. In this paper, another representation for coupling the biochemical processes in the bio-chemo-mechanical model is introduced. Using a quadratic form to represent the angular dependency of the activation level, the model's number of degrees of freedom is significantly reduced. Numerical results similar to the original representation are obtained while a significant improvement in computation time is achieved.
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Affiliation(s)
- Christian Rüdiger Bahls
- Institute of General Electrical Engineering, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany.
| | - Duy Truong
- Institute of General Electrical Engineering, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany
| | - Ursula van Rienen
- Institute of General Electrical Engineering, University of Rostock, Albert-Einstein-Str. 2, 18059 Rostock, Germany
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23
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Moerke C, Mueller P, Nebe JB. Sensing of micropillars by osteoblasts involves complex intracellular signaling. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2017; 28:171. [PMID: 28956212 PMCID: PMC5617863 DOI: 10.1007/s10856-017-5982-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 09/01/2017] [Indexed: 06/07/2023]
Abstract
Topographical material surface features are sensed by cells and provoke a large range of cellular responses. We recognized earlier, that at micropillar topographies in the range of 5 µm, the osteoblasts attempt to phagocytize the pillars resulted in increased energy requirements and reduced osteoblast marker expression, e.g., collagen type I and osteocalcin. However, the precise cellular signaling transducing the topographic information into the cell and evoking phagocytic processes remained unknown. Here, we could show that the RhoA/ROCK signaling is involved in the transduction of the topography-mediated cellular reactions. After inhibition of ROCK-2 with Y27632 for 24 h, no caveolae-mediated micropillar assembly of the cell membrane domain component caveolin-1 (Cav-1) was found. ROCK inhibition was also able to attenuate the pillar-induced decrease in β-actin. Interestingly, phosphatidylinositol 3-kinase (PI3K) inhibition with LY294002 for 24 h did not influence the Cav-1 clustering on micropillars. Our results illustrate the importance of the integrin down-stream signaling of RhoA/ROCK in the recognition of and adaption to surface microtopographies by osteoblasts and extend our understanding about the complex mechanism of action inside the cells.
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Affiliation(s)
- Caroline Moerke
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057, Rostock, Germany
| | - Petra Mueller
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057, Rostock, Germany
| | - J Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69, 18057, Rostock, Germany.
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Fu DL, Jiang QH, He FM, Fu BP. Adhesion of bone marrow mesenchymal stem cells on porous titanium surfaces with strontium-doped hydroxyapatite coating. J Zhejiang Univ Sci B 2017. [DOI: 10.1631/jzus.b1600517] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Truong DT, Bahls C, Nebe B, van Rienen U. An implementation for the simulation of cells on micro-post arrays. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2017; 2016:6138-6141. [PMID: 28269653 DOI: 10.1109/embc.2016.7592129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The mechanical interaction between cells and their underlying substrates is important in understanding the processes that take place at an interface between biological tissue and the surface of implants. There have been numerous studies that examine these interactions both by experimental and numerical modeling. The bio-chemo-mechanical model for cell contractility by Deshpande et al. [1] has numerous applications and advantages. This work shows a way to implement this model in COMSOL MULTIPHYSICS® so it can be easily modified or extended. This will allow us in a next step to couple the differential system with additional external stimuli.
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Matschegewski C, Matthies JB, Grabow N, Schmitz KP. Cell adhesion and viability of human endothelial cells on electrospun polymer scaffolds. CURRENT DIRECTIONS IN BIOMEDICAL ENGINEERING 2016. [DOI: 10.1515/cdbme-2016-0006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThe usage of electrospun polymer scaffolds is a promising approach for artificial heart valve design. This study aims at the evaluation of biological performance of nanofibrous polymer scaffolds poly(L-lactide) PLLA L210, PLLA L214 and polyamide-6 fabricated by electrospinning via analyzing viability, adhesion and morphology of human umbilical vein endothelial cells (EA.hy926). Nanofibrous surface topography was shown to influence cell phenotype and cell viability according to the observation of diminished cell spreading accompanied with reduced cell viability on nonwovens. Among those, highest biocompatibility was assessed for PLLA L214, although being generally low when compared to the planar control surface. Electrospinning was demonstrated as an innovative technique for the fabrication of advanced biomaterials aiming at guided cellular behavior as well as the design of novel implant platforms. A better understanding of cell–biomaterial interactions is desired to further improve implant development.
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Affiliation(s)
- Claudia Matschegewski
- 1Institute for ImplantTechnology and Biomaterials e.V. and Institute for Biomedical Engineering, Rostock University Medical Center, Rostock-Warnemünde, Germany
| | - Jörn-Bo Matthies
- 2Institute for Biomedical Engineering, Rostock University Medical Center, Rostock-Warnemünde, Germany
| | - Niels Grabow
- 2Institute for Biomedical Engineering, Rostock University Medical Center, Rostock-Warnemünde, Germany
| | - Klaus-Peter Schmitz
- 1Institute for ImplantTechnology and Biomaterials e.V. and Institute for Biomedical Engineering, Rostock University Medical Center, Rostock-Warnemünde, Germany
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Moerke C, Mueller P, Nebe B. Attempted caveolae-mediated phagocytosis of surface-fixed micro-pillars by human osteoblasts. Biomaterials 2015; 76:102-14. [PMID: 26519652 DOI: 10.1016/j.biomaterials.2015.10.030] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/30/2015] [Accepted: 10/14/2015] [Indexed: 01/26/2023]
Abstract
Cells are sensitive to their underlying micro- and nano-topography, but the complex interplay is not completely understood especially if sharp edges and ridges of stochastically modified surfaces interfere with an attached cell body. Micro-topography offers cues that evoke a large range of cell responses e.g. altered adhesion behavior and integrin expression resulting in disturbed cell functions. In this study, we analyzed why osteoblastic cells mimic the underlying geometrical micro-pillar structure (5 × 5 × 5 μm, spacing of 5 μm) with their actin cytoskeleton. Interestingly, we discovered an attempted caveolae-mediated phagocytosis of each micro-pillar beneath the cells, which was accompanied by increased intracellular reactive oxygen species (ROS) production and reduced intracellular ATP levels. This energy consuming process hampered the cells in their function as osteoblasts at the interface. The raft-dependent/caveolae-mediated phagocytic pathway is regulated by diverse cellular components including caveolin-1 (Cav-1), cholesterol, actin cytoskeleton as well as actin-binding proteins like annexin A2 (AnxA2). Our results show a new aspect of osteoblast-material interaction and give insight into how cells behave on extraordinary micro-structures. We conclude that stochastically structured implants used in orthopedic surgery should avoid any topographical heights which induce phagocytosis to prevent their successful ingrowth.
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Affiliation(s)
- Caroline Moerke
- University Medical Center Rostock, Dept. of Cell Biology, Rostock, Germany
| | - Petra Mueller
- University Medical Center Rostock, Dept. of Cell Biology, Rostock, Germany
| | - Barbara Nebe
- University Medical Center Rostock, Dept. of Cell Biology, Rostock, Germany.
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28
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Intracellular calcium dynamics dependent on defined microtopographical features of titanium. Biomaterials 2015; 46:48-57. [DOI: 10.1016/j.biomaterials.2014.12.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 12/10/2014] [Accepted: 12/16/2014] [Indexed: 02/06/2023]
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Li B, Han Y, Qi K. Formation mechanism, degradation behavior, and cytocompatibility of a nanorod-shaped HA and pore-sealed MgO bilayer coating on magnesium. ACS APPLIED MATERIALS & INTERFACES 2014; 6:18258-74. [PMID: 25265530 DOI: 10.1021/am505437e] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A novel bilayer coating (HT24h) was fabricated on magnesium using microarc oxidation (MAO) and hydrothermal treatment (HT). The coating comprises an outer layer of narrow interrod spaced hydroxyapatite (HA) nanorods and an inner layer of MgO containing Mg(OH)2/HA-sealing-pores. The hydrothermal formation mechanism of HA nanorods on MAO-formed MgO was explored. Also, evolution of structure and bonding integrity of HT24h coating with immersion in physiological saline (PS) for 0-90 days, corrosion resistance and cytocompatibility of the coating were investigated, together with MgO containing Mg(OH)2-sealing-pores (HT2h) and porous MgO (MAO) coatings. Corrosion resistance was identified by three-point bending and electrochemical tests in PS, while cytocompatibility was determined by MTT, live/dead staining, and vinculin-actin-nucleus tricolor staining assays of hFOB1.19 cells. Immersion tests indicate that cracking rather than delamination is a common feature in most areas of the coatings up to day 90 and degradation is the reason for thinning in thickness of the coatings. MAO and HT2h coatings exhibit a significant thinning due to fast degradation of MgO. However, HT24h coating shows a quite small thinning, owing to the fact that the HA nanorods underwent quite slow degradation while the underlying MgO only underwent conversion to Mg(OH)2 without dissolution of the Mg(OH)2. Scratch tests reveal that HT24h coating still retains relatively high bonding integrity, although the failure position changes from the MgO interior to a point between the HA and MgO layers after 90 days of immersion. HT24h coating appears far more effective than MAO and HT2h coatings in reducing degradation and maintaining the mechanical integrity of Mg, as well as enhancing the mitochondrial activity, adhesion, and proliferation of osteoblasts.
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Affiliation(s)
- Bo Li
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University , Xi'an 710049, China
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Zhao N, Zhu D. Collagen self-assembly on orthopedic magnesium biomaterials surface and subsequent bone cell attachment. PLoS One 2014; 9:e110420. [PMID: 25303459 PMCID: PMC4193861 DOI: 10.1371/journal.pone.0110420] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 09/22/2014] [Indexed: 11/18/2022] Open
Abstract
Magnesium (Mg) biomaterials are a new generation of biodegradable materials and have promising potential for orthopedic applications. After implantation in bone tissues, these materials will directly interact with extracellular matrix (ECM) biomolecules and bone cells. Type I collagen, the major component of bone ECM, forms the architecture scaffold that provides physical support for bone cell attachment. However, it is still unknown how Mg substrate affects collagen assembly on top of it as well as subsequent cell attachment and growth. Here, we studied the effects of collagen monomer concentration, pH, assembly time, and surface roughness of two Mg materials (pure Mg and AZ31) on collagen fibril formation. Results showed that formation of fibrils would not initiate until the monomer concentration reached a certain level depending on the type of Mg material. The thickness of collagen fibril increased with the increase of assembly time. The structures of collagen fibrils formed on semi-rough surfaces of Mg materials have a high similarity to that of native bone collagen. Next, cell attachment and growth after collagen assembly were examined. Materials with rough surface showed higher collagen adsorption but compromised bone cell attachment. Interestingly, surface roughness and collagen structure did not affect cell growth on AZ31 for up to a week. Findings from this work provide some insightful information on Mg-tissue interaction at the interface and guidance for future surface modifications of Mg biomaterials.
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Affiliation(s)
- Nan Zhao
- Department of Chemical, Biological and Bio-Engineering, North Carolina Agricultural and Technical State University, Greensboro, North Carolina, United States of America
- NSF Engineering Research Center-Revolutionizing Metallic Biomaterials, North Carolina Agricultural and Technical State University, Greensboro, North Carolina, United States of America
| | - Donghui Zhu
- Department of Chemical, Biological and Bio-Engineering, North Carolina Agricultural and Technical State University, Greensboro, North Carolina, United States of America
- NSF Engineering Research Center-Revolutionizing Metallic Biomaterials, North Carolina Agricultural and Technical State University, Greensboro, North Carolina, United States of America
- * E-mail:
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Bittig AT, Matschegewski C, Nebe JB, Stählke S, Uhrmacher AM. Membrane related dynamics and the formation of actin in cells growing on micro-topographies: a spatial computational model. BMC SYSTEMS BIOLOGY 2014; 8:106. [PMID: 25200251 PMCID: PMC4363941 DOI: 10.1186/s12918-014-0106-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 08/18/2014] [Indexed: 01/07/2023]
Abstract
Background Intra-cellular processes of cells at the interface to an implant surface are influenced significantly by their extra-cellular surrounding. Specifically, when growing osteoblasts on titanium surfaces with regular micro-ranged geometry, filaments are shorter, less aligned and they concentrate at the top of the geometric structures. Changes to the cytoskeleton network, i. e., its localization, alignment, orientation, and lengths of the filaments, as well as the overall concentration and distribution of key-actors are induced. For example, integrin is distributed homogeneously, whereas integrin in activated state and vinculin, both components of focal adhesions, have been found clustered on the micro-ranged geometries. Also, the concentration of Rho, an intracellular signaling protein related to focal adhesion regulation, was significantly lower. Results To explore whether regulations associated with the focal adhesion complex can be responsible for the changed actin filament patterns, a spatial computational model has been developed using ML-Space, a rule-based model description language, and its associated Brownian-motion-based simulator. The focus has been on the deactivation of cofilin in the vicinity of the focal adhesion complex. The results underline the importance of sensing mechanisms to support a clustering of actin filament nucleations on the micro-ranged geometries, and of intracellular diffusion processes, which lead to spatially heterogeneous distributions of active (dephosphorylated) cofilin, which in turn influences the organization of the actin network. We find, for example, that the spatial heterogeneity of key molecular actors can explain the difference in filament lengths in cells on different micro-geometries partly, but to explain the full extent, further model assumptions need to be added and experimentally validated. In particular, our findings and hypothesis referring to the role, distribution, and amount of active cofilin have still to be verified in wet-lab experiments. Conclusion Letting cells grow on surface structures is a possibility to shed new light on the intricate mechanisms that relate membrane and actin related dynamics in the cell. Our results demonstrate the need for declarative expressive spatial modeling approaches that allow probing different hypotheses, and the central role of the focal adhesion complex not only for nucleating actin filaments, but also for regulating possible severing agents locally.
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Affiliation(s)
- Arne T Bittig
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Albert-Einstein-Str. 22, Rostock, 18059, Germany.
| | - Claudia Matschegewski
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany. .,Present address: Agronomy and Crop Science, Faculty of Agricultural and Environmental Sciences, University of Rostock, Rostock, Germany.
| | - J Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany.
| | - Susanne Stählke
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany.
| | - Adelinde M Uhrmacher
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Albert-Einstein-Str. 22, Rostock, 18059, Germany.
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Delgado-Ruiz RA, Abboud M, Romanos G, Aguilar-Salvatierra A, Gomez-Moreno G, Calvo-Guirado JL. Peri-implant bone organization surrounding zirconia-microgrooved surfaces circularly polarized light and confocal laser scanning microscopy study. Clin Oral Implants Res 2014; 26:1328-37. [DOI: 10.1111/clr.12461] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/09/2014] [Indexed: 11/28/2022]
Affiliation(s)
| | - Marcus Abboud
- School of Dental Medicine; Stony Brook University; Stony Brook NY USA
| | - Georgios Romanos
- School of Medicine and Dentistry; Granada University; Granada Spain
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Kaluđerović MR, Schreckenbach JP, Graf HL. First titanium dental implants with white surfaces: Preparation and in vitro tests. Dent Mater 2014; 30:759-68. [DOI: 10.1016/j.dental.2014.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 01/30/2014] [Accepted: 04/22/2014] [Indexed: 01/07/2023]
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You R, Li X, Xu Y, Liu Y, Lu S, Li M. The Micropillar Structure on Silk Fibroin Film Influence Intercellular Connection Mediated by Nanotubular Structures. MATERIALS 2014; 7:4628-4639. [PMID: 28788697 PMCID: PMC5455910 DOI: 10.3390/ma7064628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 05/28/2014] [Accepted: 06/09/2014] [Indexed: 01/09/2023]
Abstract
Tunneling nanotubes are important membrane channels for cell-to-cell communication. In this study, we investigated the effect of the microenvironment on nanotubular structures by preparing a three-dimensional silk fibroin micropillar structure. In previous reports, tunneling nanotubes were described as stretched membrane channels between interconnected cells at their nearest distance. They hover freely in the cell culture medium and do not contact with the substratum. Interestingly, the micropillars could provide supporting points for nanotubular connection on silk fibroin films, where nanotubular structure formed a stable anchor at contact points. Consequently, the extension direction of nanotubular structure was affected by the micropillar topography. This result suggests that the hovering tunneling nanotubes in the culture medium will come into contact with the raised roadblock on the substrates during long-distance extension. These findings imply that the surface microtopography of biomaterials have an important influence on cell communication mediated by tunneling nanotubes.
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Affiliation(s)
- Renchuan You
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
| | - Xiufang Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
| | - Yamei Xu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
| | - Yu Liu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
| | - Shenzhou Lu
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
| | - Mingzhong Li
- National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, No. 199 Ren'ai Road, Industrial Park, Suzhou 215123, Jiangsu, China.
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Geometrical Micropillars Combined with Chemical Surface Modifications – Independency of Actin Filament Spatial Distribution in Primary Osteoblasts. ACTA ACUST UNITED AC 2014. [DOI: 10.4028/www.scientific.net/msf.783-786.1320] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cell-biomaterial interactions are strongly affected by topographical and chemical surface characteristics. We found out earlier that geometric titanium (Ti) pillar structures in the micrometer range induce the cells to rearrange their actin cytoskeleton in short fibers solely on the top of the pillars. As a result, cell physiology was hampered concerning collagen I synthesis and spreading capacity. Furthermore, the position-dependent initial cell adhesion strength was declined near the edges.
We asked whether these observed cellular effects can be performed only in combination with Ti or occur independently of chemical surface features. In addition, the specific culture conditions, e.g. serum content or influence of gravity, were of interest.
Human primary osteoblasts were cultured in Osteoblast Growth Medium with serum containing SupplementMix on pure silicon pillars (5x5x5 μm) or on samples additionally sputtered with Ti (as reference) or gold. To offer the cells ligands for their adhesion receptors, we coated the pillars with collagen I or alternatively with a plasma polymer layer from allylamine. Different from standard culture conditions, the cells were cultured against gravity as well as without serum. The actin cytoskeleton was stained with phalloidin-TRITC after 24 h and analyzed by confocal laser scanning microscopy. Interestingly, on all modifications tested the cell’s actin cytoskeleton was distinctly organized in short fibers on the top of the pillars. Thus, we were able to exclude the influence of (i) the material chemistry (gold, silicon, physical plasma vs. Ti), (ii) the protein deposition on the pillar top and edges, and (iii) the impression caused by gravity.
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Zhou J, Han Y, Lu S. Direct role of interrod spacing in mediating cell adhesion on Sr-HA nanorod-patterned coatings. Int J Nanomedicine 2014; 9:1243-60. [PMID: 24634585 PMCID: PMC3952902 DOI: 10.2147/ijn.s58236] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The process in which nanostructured surfaces mediate cell adhesion is not well understood, and may be indirect (via protein adsorption) or direct. We prepared Sr-doped hydroxyapatite (Sr1-HA) 3D nanorods (with interrod spacing of 67.3 ± 3.8, 95.7 ± 4.2, and 136.8 ± 8.7 nm) and 2D nanogranulate patterned coatings on titanium. Employing the coatings under the same surface chemistry and roughness, we investigated the indirect/direct role of Sr1-HA nanotopographies in the regulation of osteoblast adhesion in both serum-free and serum-containing Dulbecco's Modified Eagle/Ham's Medium. The results reveal that the number of adherent cells, cell-secreted anchoring proteins (fibronectin, vitronectin, and collagen), vinculin and focal adhesion kinase (FAK) denoted focal adhesion (FA) contact, and gene expression of vinculin, FAK, and integrin subunits (α2, α5, αv, β1, and β3), undergo significant changes in the inter-nanorod spacing and dimensionality of Sr1-HA nanotopographies in the absence of serum; they are significantly enhanced on the <96 nm spaced nanorods and more pronounced with decreasing interrod spacing. However, they are inhibited on the >96 nm spaced nanorods compared to nanogranulated 2D topography. Although the adsorption of fibronectin and vitronectin from serum are higher on 136.8 ± 8.7 nm spaced nanorod patterned topography than nanogranulated topography, cell adhesion is inhibited on the former compared to the latter in the presence of serum, further suggesting that reduced cell adhesion is independent of protein adsorption. It is clearly indicated that 3D nanotopography can directly modulate cell adhesion by regulating integrins, which subsequently mediate anchoring proteins' secretion and FA formation rather than via protein adsorption.
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Affiliation(s)
- Jianhong Zhou
- State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Shemin Lu
- Department of Genetics and Molecular Biology, College of Medicine, Xi’an Jiaotong University, Xi’an, People’s Republic of China
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Vrana NE, Dupret-Bories A, Schultz P, Debry C, Vautier D, Lavalle P. Titanium microbead-based porous implants: bead size controls cell response and host integration. Adv Healthc Mater 2014; 3:79-87. [PMID: 23814016 DOI: 10.1002/adhm.201200369] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 02/02/2013] [Indexed: 01/03/2023]
Abstract
Openly porous structures in implants are desirable for better integration with the host tissue. Sintered microbead-based titanium implants for oto-rhinolaryngology applications, which create an environment where the cells can migrate in the areas between the microbeads, are developed. This structure promotes fibrovascular tissue formation within the implant in vivo. In this study, it is determine to what extent these events can be controlled by changing the physical environment of the implants both in vitro and in vivo. By cell tracking, it is observed that the size of the beads and the distance between the neighboring beads significantly affect the ability of cells to develop cell-to-cell contacts and to bridge the pores. Live cell staining shows that as the bead size gets smaller, the probability to observe cells that fill the porous areas is higher. This also affects the initial attachment and distribution of the cells and collagen secretion by fibroblasts. Obtaining a fast coverage of the system also enables co-culture systems where, the number and the distribution of the second cell type are boosted by the presence of the first. This concept is utilized to increase the attachment of vascular endothelial cells by an initial layer of fibroblasts. By decreasing the bead diameter, the overall colonization of the implant can be significantly increased in vivo. The effect of bead size has a similar pattern both in rats and rabbits, with faster colonization of smaller bead-based structures. Using smaller beads would improve clinical outcomes as faster integration facilitates the attainment of functionality by the implant.
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Affiliation(s)
- Nihal Engin Vrana
- INSERM, UMR-S 1121, "Biomatériaux et Bioingénierie", 11 rue Humann, F-67085 Strasbourg Cedex, France; Université de Strasbourg, Faculté de Chirurgie Dentaire, 1 place de l'Hôpital, 67000 Strasbourg, France.
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Song Y, Ju Y, Morita Y, Song G. Effect of the nanostructure of porous alumina on growth behavior of MG63 osteoblast-like cells. J Biosci Bioeng 2013; 116:509-15. [DOI: 10.1016/j.jbiosc.2013.04.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/03/2013] [Indexed: 10/26/2022]
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Imani R, Kabaso D, Erdani Kreft M, Gongadze E, Penic S, Elersic K, Kos A, Veranic P, Zorec R, Iglic A. Morphological alterations of T24 cells on flat and nanotubular TiO2 surfaces. Croat Med J 2013; 53:577-85. [PMID: 23275323 PMCID: PMC3541584 DOI: 10.3325/cmj.2012.53.577] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Aim To investigate morphological alterations of malignant cancer cells (T24) of urothelial origin seeded on flat titanium (Ti) and nanotubular titanium dioxide (TiO2) nanostructures. Methods Using anodization method, TiO2 surfaces composed of vertically aligned nanotubes of 50-100 nm diameters were produced. The flat Ti surface was used as a reference. The alteration in the morphology of cancer cells was evaluated using scanning electron microscopy (SEM). A computational model, based on the theory of membrane elasticity, was constructed to shed light on the biophysical mechanisms responsible for the observed changes in the contact area of adhesion. Results Large diameter TiO2 nanotubes exhibited a significantly smaller contact area of adhesion (P < 0.0001) and had more membrane protrusions (eg, microvilli and intercellular membrane nanotubes) than on flat Ti surface. Numerical membrane dynamics simulations revealed that the low adhesion energy per unit area would hinder the cell spreading on the large diameter TiO2 nanotubular surface, thus explaining the small contact area. Conclusion The reduction in the cell contact area in the case of large diameter TiO2 nanotube surface, which does not enable formation of the large enough number of the focal adhesion points, prevents spreading of urothelial cells.
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Affiliation(s)
- Roghayeh Imani
- Faculty of Electrical Engineering, University of Ljubljana, Ljubljana, Slovenia
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Substrate topography determines neuronal polarization and growth in vitro. PLoS One 2013; 8:e66170. [PMID: 23785482 PMCID: PMC3681759 DOI: 10.1371/journal.pone.0066170] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 05/03/2013] [Indexed: 11/19/2022] Open
Abstract
The establishment of neuronal connectivity depends on the correct initial polarization of the young neurons. In vivo, developing neurons sense a multitude of inputs and a great number of molecules are described that affect their outgrowth. In vitro, many studies have shown the possibility to influence neuronal morphology and growth by biophysical, i.e. topographic, signaling. In this work we have taken this approach one step further and investigated the impact of substrate topography in the very early differentiation stages of developing neurons, i.e. when the cell is still at the round stage and when the first neurite is forming. For this purpose we fabricated micron sized pillar structures with highly reproducible feature sizes, and analyzed neurons on the interface of flat and topographic surfaces. We found that topographic signaling was able to attract the polarization markers of mouse embryonic neurons -N-cadherin, Golgi-centrosome complex and the first bud were oriented towards topographic stimuli. Consecutively, the axon was also preferentially extending along the pillars. These events seemed to occur regardless of pillar dimensions in the range we examined. However, we found differences in neurite length that depended on pillar dimensions. This study is one of the first to describe in detail the very early response of hippocampal neurons to topographic stimuli.
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Zuo J, Huang X, Zhong X, Zhu B, Sun Q, Jin C, Quan H, Tang Z, Chen W. A comparative study of the influence of three pure titanium plates with different micro- and nanotopographic surfaces on preosteoblast behaviors. J Biomed Mater Res A 2013; 101:3278-84. [PMID: 23625827 DOI: 10.1002/jbm.a.34612] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 12/06/2012] [Accepted: 01/02/2013] [Indexed: 01/09/2023]
Abstract
There is a great demand for dental implants with the ability to accelerate periimplant bone regeneration. Modification of surface micro- and nanotopographies has been revealed to affect bone cell metabolism. In this study, we utilized dielectric barrier discharge (DBD) technology to modify commercially pure titanium (Ti-tr) surfaces and then investigated the cytocompability of DBD-modified Ti surface when compared with machined (Ti-m) and polished (Ti-p) Ti surfaces. These three kinds of Ti plates exhibited different surface energies and topographies at the micro- and nanoscale levels. The DBD-treated pure Ti surface significantly enhances cell adhesion, spread, and proliferation of MC3T3-E1 preosteoblast cells compared with the Ti-p and Ti-m surfaces, suggesting that Ti-tr has better cytocompatibility compared with the other two surfaces. Preosteoblast cells on Ti-m surface exhibited higher alkaline phosphatase activity than cells on Ti-tr and Ti-p surfaces 14 days after seeding. No significant difference in alkaline phosphatase activity was observed between cells grown on Ti-tr and Ti-p surfaces. Our study demonstrated that DBD modification significantly enhanced cell adhesion, spread, and proliferation of preosteoblasts with no negative effects on cell differentiation. Microtopography and nanotopography of the surfaces of different materials and chemical/energetic properties have a synergistic effect on cell attachment, proliferation, and differentiation.
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Affiliation(s)
- Jun Zuo
- Department of Oral and Maxillofacial Surgery, Xiangya Hospital School of Stomatology, Central South University, Changsha, 410078, China; Shanghai Key Laboratory of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Abstract
Micro- and nanotopography as well as the surface chemistry of biomaterials affect cell adhesion, proliferation and cell differentiation. Furthermore, the organization and localization of intracellular adhesion components such as the actin cytoskeleton are also altered dependent on the material surface topography. However, the detailed influence of the material micro-structure on cellular mechanisms on the molecular level is still unknown. This study is intended to elucidate such effects using regular pillar structures to characterize the modulation of cell responses like the regulation of voltage-sensitive calcium channels as well as signaling molecules in human osteoblasts. To analyze cell behavior on defined biomaterial surfaces, human osteoblastic MG 63 cells were cultured on geometrically micro textured titanium coated silicon wafers, as opposed to planar titanium references. Samples were fabricated by a photolithographic process using the negative tone resist SU 8 and sputter-coated with 100 nm titanium. Immunofluorescence staining and flow cytometry are used to detect the expression levels and the function of T type calcium channels. Knowledge about the biocomplexity of cell behavior dependent on topographical characteristics is of clinical relevance for the development of implant designs in tissue engineering.
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Du K, Gan Z. Cellular interactions on hierarchical poly(ε-caprolactone) nanowire micropatterns. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4643-4650. [PMID: 22873768 DOI: 10.1021/am301013e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A double template method to fabricate poly(ε-caprolactone) (PCL) hierarchical patterned nanowires with highly ordered nano- and microscaled topography was developed in this study. The topography of PCL film with a patterned nanowire surface can be easily and well controlled by changing the template and melting time of PCL film on the templates. The surface morphology, water contact angle, protein adsorption, and cell growth behavior on the PCL films with different surface structures were well studied. The results revealed that the PCL nanowire arrays and the hierarchical patterned nanowires showed higher capability of protein adsorption and better cell growth than the PCL film with smooth surface. Typically, the PCL surface with hierarchical nanowire patterns was most favorable for cell attachment and proliferation. The present study was innovative at fabrication of polymer substrates with hierarchical architecture of nanowires inside microscaled islands to gain insight into the cell response to this unique topography and to develop a new method of constructing the bionic surface for tissue engineering applications.
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Affiliation(s)
- Ke Du
- The CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
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Mas-Moruno C, Dorfner PM, Manzenrieder F, Neubauer S, Reuning U, Burgkart R, Kessler H. Behavior of primary human osteoblasts on trimmed and sandblasted Ti6Al4V surfaces functionalized with integrin αvβ3-selective cyclic RGD peptides. J Biomed Mater Res A 2012; 101:87-97. [DOI: 10.1002/jbm.a.34303] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 05/10/2012] [Accepted: 05/25/2012] [Indexed: 02/05/2023]
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Matschegewski C, Staehlke S, Birkholz H, Lange R, Beck U, Engel K, Nebe JB. Automatic Actin Filament Quantification of Osteoblasts and Their Morphometric Analysis on Microtextured Silicon-Titanium Arrays. MATERIALS 2012. [PMCID: PMC5448894 DOI: 10.3390/ma5071176] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Microtexturing of implant surfaces is of major relevance in the endeavor to improve biorelevant implant designs. In order to elucidate the role of biomaterial’s topography on cell physiology, obtaining quantitative correlations between cellular behavior and distinct microarchitectural properties is in great demand. Until now, the microscopically observed reorganization of the cytoskeleton on structured biomaterials has been difficult to convert into data. We used geometrically microtextured silicon-titanium arrays as a model system. Samples were prepared by deep reactive-ion etching of silicon wafers, resulting in rectangular grooves (width and height: 2 µm) and cubic pillars (pillar dimensions: 2 × 2 × 5 and 5 × 5 × 5 µm); finally sputter-coated with 100 nm titanium. We focused on the morphometric analysis of MG-63 osteoblasts, including a quantification of the actin cytoskeleton. By means of our novel software FilaQuant, especially developed for automatic actin filament recognition, we were first able to quantify the alterations of the actin network dependent on the microtexture of a material surface. The cells’ actin fibers were significantly reduced in length on the pillared surfaces versus the grooved array (4–5 fold) and completely reorganized on the micropillars, but without altering the orientation of cells. Our morpho-functional approach opens new possibilities for the data correlation of cell-material interactions.
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Affiliation(s)
- Claudia Matschegewski
- Biomedical Research Center, Department of Cell Biology, University of Rostock, Schillingallee 69, 18057 Rostock, Germany; E-Mails: (C.M.); (S.S.)
| | - Susanne Staehlke
- Biomedical Research Center, Department of Cell Biology, University of Rostock, Schillingallee 69, 18057 Rostock, Germany; E-Mails: (C.M.); (S.S.)
| | - Harald Birkholz
- Institute of Mathematics, University of Rostock, Ulmenstrasse 69, 18057 Rostock, Germany; E-Mails: (H.B.); (K.E.)
| | - Regina Lange
- Department of Electrical Engineering and Informatics, University of Rostock, A.-Einstein-Strasse 2, 18059 Rostock, Germany; E-Mails: (R.L.); (U.B.)
| | - Ulrich Beck
- Department of Electrical Engineering and Informatics, University of Rostock, A.-Einstein-Strasse 2, 18059 Rostock, Germany; E-Mails: (R.L.); (U.B.)
| | - Konrad Engel
- Institute of Mathematics, University of Rostock, Ulmenstrasse 69, 18057 Rostock, Germany; E-Mails: (H.B.); (K.E.)
| | - J. Barbara Nebe
- Biomedical Research Center, Department of Cell Biology, University of Rostock, Schillingallee 69, 18057 Rostock, Germany; E-Mails: (C.M.); (S.S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +49-381-494-7771; Fax: +49-381-494-7764
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Elter P, Weihe T, Bühler S, Gimsa J, Beck U. Low fibronectin concentration overcompensates for reduced initial fibroblasts adhesion to a nanoscale topography: Single-cell force spectroscopy. Colloids Surf B Biointerfaces 2012; 95:82-9. [DOI: 10.1016/j.colsurfb.2012.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 01/18/2012] [Accepted: 02/14/2012] [Indexed: 11/29/2022]
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Vrana NE, Dupret-Bories A, Bach C, Chaubaroux C, Coraux C, Vautier D, Boulmedais F, Haikel Y, Debry C, Metz-Boutigue MH, Lavalle P. Modification of macroporous titanium tracheal implants with biodegradable structures: tracking in vivo integration for determination of optimal in situ epithelialization conditions. Biotechnol Bioeng 2012; 109:2134-46. [PMID: 22331657 DOI: 10.1002/bit.24456] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 01/18/2012] [Accepted: 01/26/2012] [Indexed: 01/22/2023]
Abstract
Previously, we showed that macroporous titanium implants, colonized in vivo together with an epithelial graft, are viable options for tracheal replacement in sheep. To decrease the number of operating steps, biomaterial-based replacements for epithelial graft and intramuscular implantation were developed in the present study. Hybrid microporous PLLA/titanium tracheal implants were designed to decrease initial stenosis and provide a surface for epithelialization. They have been implanted in New Zealand white rabbits as tracheal substitutes and compared to intramuscular implantation samples. Moreover, a basement membrane like coating of the implant surface was also designed by Layer-by-Layer (LbL) method with collagen and alginate. The results showed that the commencement of stenosis can be prevented by the microporous PLLA. For determination of the optimum time point of epithelialization after implantation, HPLC analysis of blood samples, C-reactive protein (CRP), and Chromogranin A (CGA) analyses and histology were carried out. Following 3 weeks the implant would be ready for epithelialization with respect to the amount of tissue integration. Calcein-AM labeled epithelial cell seeding showed that after 3 weeks implant surfaces were suitable for their attachment. CRP readings were steady after an initial rise in the first week. Cross-linked collagen/alginate structures show nanofibrillarity and they form uniform films over the implant surfaces without damaging the microporosity of the PLLA body. Human respiratory epithelial cells proliferated and migrated on these surfaces which provided a better alternative to PLLA film surface. In conclusion, collagen/alginate LbL coated hybrid PLLA/titanium implants are viable options for tracheal replacement, together with in situ epithelialization.
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Affiliation(s)
- Nihal Engin Vrana
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité 977, 11 Rue Humann, 67085 Strasbourg, France
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Duske K, Koban I, Kindel E, Schröder K, Nebe B, Holtfreter B, Jablonowski L, Weltmann KD, Kocher T. Atmospheric plasma enhances wettability and cell spreading on dental implant metals. J Clin Periodontol 2012; 39:400-7. [PMID: 22324415 DOI: 10.1111/j.1600-051x.2012.01853.x] [Citation(s) in RCA: 119] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/25/2011] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Treatment regimens, which predictably support re-osseointegration of implants with peri-implantitis, are needed. Increased wettability may be an important factor for re-osseointegration. In this study, a cold atmospheric pressure gas-discharge plasma was applied to reduce water contact angles on titanium discs with different surface topography and to improve the spreading of osteoblastic cells. MATERIAL AND METHODS An argon plasma jet with different oxygen admixtures was used to treat titanium discs with different topologies, i.e. machined, SLA(®) , SLActive(®) , diamond bur-treated or Airflow(®) -treated. Water contact angles were measured before and after plasma treatment. The spreading behaviour of human osteoblastic cells was investigated. RESULTS Contact angle of titanium discs (baseline values: 68°-117°) were significantly reduced close to 0° irrespective of surface topography after the application of argon plasma with 1.0% oxygen admixture for 60 s or 120 s. The cell size of osteoblastic cells grown on argon-oxygen-plasma-treated titanium discs was significantly larger than on non-treated surfaces (p < 0.001) irrespective of surface topography. CONCLUSIONS Plasma treatment reduced contact angle and supported spreading of osteoblastic cells. The application of cold plasma may be supportive in the treatment of peri-implant lesions and may improve the process of re-osseointegration.
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Affiliation(s)
- Kathrin Duske
- Unit of Periodontology, Department of Restorative Dentistry, Periodontology and Endodontology, Dental School, Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
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Control of cell nucleus shapes via micropillar patterns. Biomaterials 2011; 33:1730-5. [PMID: 22133552 DOI: 10.1016/j.biomaterials.2011.11.023] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Accepted: 11/13/2011] [Indexed: 12/19/2022]
Abstract
We herein report a material technique to control the shapes of cell nuclei by the design of the microtopography of substrates to which the cells adhere. Poly(D,L-lactide-co-glycolide) (PLGA) micropillars or micropits of a series of height or depth were fabricated, and some surprising self deformation of the nuclei of bone marrow stromal cells (BMSCs) was found in the case of micropillars with a sufficient height. Despite severe nucleus deformation, BMSCs kept the ability of proliferation and differentiation. We further demonstrated that the shapes of cell nuclei could be regulated by the appropriate micropillar patterns. Besides circular and elliptoid shapes, some unusual nucleus shapes of BMSCs have been achieved, such as square, cross, dumbbell, and asymmetric sphere-protrusion.
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