1
|
Hirsch WDB, Weber A, Ferri J, Etges A, Neto PI, Pereira FDADS, Heitz C. An Analysis of the Biocompatibility, Cytotoxicity, and Bone Conductivity of Polycaprolactone: An In Vivo Study. Polymers (Basel) 2024; 16:2271. [PMID: 39204491 PMCID: PMC11359069 DOI: 10.3390/polym16162271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Revised: 07/06/2024] [Accepted: 07/25/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Tissue engineering represents a promising field in regenerative medicine, with bioresorbable polymers such as polycaprolactone (PCL) playing a crucial role as scaffolds. These scaffolds support the growth and repair of tissues by mimicking the extracellular matrix. OBJECTIVE This study aimed to assess the in vivo performance of three-dimensional PCL scaffolds by evaluating their effects on bone repair in rat calvaria and the tissue reaction in subcutaneous implant sites, as well as their impact on major organs such as the kidneys, lungs, and liver. METHODS Three-dimensional scaffolds made of PCL were implanted in the subcutaneous tissue of rats' backs and calvaria. Histological analyses were conducted to observe the bone repair process in calvaria and the tissue response in subcutaneous implant sites. Additionally, the kidneys, lungs, and livers of the animals were examined for any adverse tissue alterations. RESULTS The histological analysis of the bone repair in calvaria revealed newly formed bone growing towards the center of the defects. In subcutaneous tissues, a thin fibrous capsule with collagenous fibers enveloping the implant was observed in all animals, indicating a positive tissue response. Importantly, no harmful alterations or signs of inflammation, hyperplasia, metaplasia, dysplasia, or hemorrhage were detected in the kidneys, lungs, and liver. CONCLUSIONS The findings demonstrate that PCL scaffolds produced through additive manufacturing are biocompatible, non-cytotoxic, and bioresorbable, promoting osteoconduction without adverse effects on major organs. Hence, PCL is confirmed as a suitable biomaterial for further studies in tissue engineering and regenerative medicine.
Collapse
Affiliation(s)
- Wâneza Dias Borges Hirsch
- Department of Stomatology, School of Dentistry, Federal University of Santa Maria, Santa Maria 97105-340, Brazil;
| | - Alexandre Weber
- Department of Stomatology, School of Dentistry, Federal University of Santa Maria, Santa Maria 97105-340, Brazil;
| | - Janaine Ferri
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-970, Brazil; (J.F.); (C.H.)
| | - Adriana Etges
- School of Dentistry, Universidade Federal de Pelotas, Pelotas 96010-610, Brazil;
| | - Paulo Inforçatti Neto
- Centro de Tecnologia da Informação Renato Archer, Campinas 13069-901, Brazil; (P.I.N.); (F.D.A.d.S.P.)
| | | | - Cláiton Heitz
- School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre 90610-970, Brazil; (J.F.); (C.H.)
| |
Collapse
|
2
|
Michurov DA, Makhina TK, Siracusa V, Bonartsev AP, Lozinsky VI, Iordanskii AL. Cryo-Structuring of Polymeric Systems. Poly(Vinyl Alcohol)-Based Cryogels Loaded with the Poly(3-hydroxybutyrate) Microbeads and the Evaluation of Such Composites as the Delivery Vehicles for Simvastatin. Polymers (Basel) 2022; 14:2196. [PMID: 35683869 PMCID: PMC9182817 DOI: 10.3390/polym14112196] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 02/06/2023] Open
Abstract
Highly porous composite poly(vinyl alcohol) (PVA) cryogels loaded with the poly(3-hydroxybutyrate) (PHB) microbeads containing the drug, simvastatin (SVN), were prepared via cryogenic processing (freezing-storing frozen-defrosting) of the beads' suspensions in aqueous PVA solution. The rigidity of the resultant composite cryogels increased with increasing the filler content. Optical microscopy of the thin section of such gel matrices revealed macro-porous morphology of both continuous (PVA cryogels) and discrete (PHB-microbeads) phases. Kinetic studies of the SVN release from the drug-loaded microbeads, the non-filled PVA cryogel and the composite material showed that the cryogel-based composite system could potentially serve as a candidate for the long-term therapeutic system for controlled drug delivery. Such PHB-microbeads-containing PVA-cryogel-based composite drug delivery carriers were unknown earlier; their preparation and studies have been performed for the first time.
Collapse
Affiliation(s)
- Dmitrii A. Michurov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street, 28, 119991 Moscow, Russia;
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia;
| | - Tatiana K. Makhina
- Research Center of Biotechnology of the Russian Academy of Sciences, 33, Bld. 2 Leninskiy Ave., 119071 Moscow, Russia;
| | - Valentina Siracusa
- Department of Chemical Science (DSC), University of Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Anton P. Bonartsev
- Faculty of Biology, M.V. Lomonosov Moscow State University, 119234 Moscow, Russia;
| | - Vladimir I. Lozinsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street, 28, 119991 Moscow, Russia;
| | - Alexey L. Iordanskii
- N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin Street, 4, 119991 Moscow, Russia;
| |
Collapse
|
3
|
Qiao X, Yang J, Shang Y, Deng S, Yao S, Wang Z, Guo Y, Peng C. Magnesium-doped Nanostructured Titanium Surface Modulates Macrophage-mediated Inflammatory Response for Ameliorative Osseointegration. Int J Nanomedicine 2020; 15:7185-7198. [PMID: 33061375 PMCID: PMC7532891 DOI: 10.2147/ijn.s239550] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 07/31/2020] [Indexed: 12/29/2022] Open
Abstract
Background Next generation of coating materials on the surface of implants is designed with a paradigm shift from an inert material to an osteoimmunomodulatory material. Regulating immune response to biomedical implants through influencing the polarization of macrophage has been proven to be an effective strategy. Methods Through anodization and hydrothermal treatment, magnesium ion incorporated TiO2 nanotube array (MgN) coating was fabricated on the surface of titanium and it is hypothesized that it has osteoimmunomodulatory properties. To verify this assumption, systematic studies were carried out by in vitro and in vivo experiments. Results Mg ion release behavior results showed that MgN coating was successfully fabricated on the surface of titanium using anodization and hydrothermal technology. Scanning electron microscopy (SEM) images showed the morphology of the MgN coating on the titanium. The expression of inflammation-related genes (IL-6, IL-1β, TNF-α) was downregulated in MgN group compared with TiO2 nanotube (NT) and blank Ti groups, but anti-inflammatory genes (IL-10 and IL-1ra) were remarkably upregulated in the MgN group. The in vitro and in vivo results demonstrated that MgN coating influenced macrophage polarization toward the M2 phenotype compared with NT and blank-Ti groups, which enhanced osteogenic differentiation of rat bone mesenchymal stem cells rBMSCs in conditioned media (CM) generated by macrophages. Conclusion MgN coating on the titanium endowed the surface with immune-regulatory features and exerted an advantageous effect on osteogenesis, thereby providing excellent strategies for the surface modification of biomedical implants.
Collapse
Affiliation(s)
- Xinrui Qiao
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Jie Yang
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Yuli Shang
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Shu Deng
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Shiyu Yao
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Zhe Wang
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Yi Guo
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Cheng Peng
- Department of Stomatology, The Second Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| |
Collapse
|
4
|
Poly(-3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV): Current advances in synthesis methodologies, antitumor applications and biocompatibility. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.02.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
5
|
Filardo G, Roffi A, Fey T, Fini M, Giavaresi G, Marcacci M, Martínez-Fernández J, Martini L, Ramírez-Rico J, Salamanna F, Sandri M, Sprio S, Tampieri A, Kon E. Vegetable hierarchical structures as template for bone regeneration: New bio-ceramization process for the development of a bone scaffold applied to an experimental sheep model. J Biomed Mater Res B Appl Biomater 2019; 108:600-611. [PMID: 31095882 DOI: 10.1002/jbm.b.34414] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 04/18/2019] [Accepted: 04/25/2019] [Indexed: 12/19/2022]
Abstract
Long bone defects still represent a major clinical challenge in orthopedics, with the inherent loss of function considerably impairing the quality of life of the affected patients. Thus, the purpose of this study was to assess the safety and potential of bone regeneration offered by a load-bearing scaffold characterized by unique hierarchical architecture and high strength, with active surface facilitating new bone penetration and osseointegration in critical size bone defects. The results of this study showed the potential of bio-ceramization processes applied to vegetable hierarchical structures for the production of new wood-derived bone scaffolds, further improved by surface functionalization, with good biological and mechanical properties leading to successful treatment of critical size bone defects in the sheep model. Future studies are needed to evaluate if these scaffolds prototypes, as either biomaterial alone or in combination with augmentation strategies, may represent an optimal solution to enhance bone regeneration in humans.
Collapse
Affiliation(s)
- Giuseppe Filardo
- Applied Translational Research Center (ATR), IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Alice Roffi
- Applied Translational Research Center (ATR), IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Tobias Fey
- Department of Materials Science and Engineering, Institute of Glass and Ceramics, University of Erlangen-Nuernberg, Erlangen, Germany
| | - Milena Fini
- Preclinical and Surgical Studies Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Gianluca Giavaresi
- Preclinical and Surgical Studies Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Maurilio Marcacci
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Knee Joint Reconstruction Center-3rd Orthopedic Division, Humanitas Clinical and Research Center, Milan, Italy
| | | | - Lucia Martini
- Preclinical and Surgical Studies Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Joaquin Ramírez-Rico
- Department of Physics of the Condensed Matter, ICMS, University of Sevilla, CSIC, Seville, Spain
| | - Francesca Salamanna
- Preclinical and Surgical Studies Laboratory, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Monica Sandri
- Institute of Science and Technology for Ceramics, National Research Council, Faenza, Italy
| | - Simone Sprio
- Institute of Science and Technology for Ceramics, National Research Council, Faenza, Italy
| | - Anna Tampieri
- Institute of Science and Technology for Ceramics, National Research Council, Faenza, Italy
| | - Elizaveta Kon
- Department of Biomedical Sciences, Humanitas University, Milan, Italy.,Knee Joint Reconstruction Center-3rd Orthopedic Division, Humanitas Clinical and Research Center, Milan, Italy
| |
Collapse
|
6
|
Bonartsev AP, Voinova VV, Bonartseva GA. Poly(3-hydroxybutyrate) and Human Microbiota (Review). APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818060066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
7
|
Khorramirouz R, Go JL, Noble C, Jana S, Maxson E, Lerman A, Young MD. A novel surgical technique for a rat subcutaneous implantation of a tissue engineered scaffold. Acta Histochem 2018. [PMID: 29519681 PMCID: PMC5914524 DOI: 10.1016/j.acthis.2018.02.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Objectives Subcutaneous implantations in small animal models are currently required for preclinical studies of acellular tissue to evaluate biocompatibility, including host recellularization and immunogenic reactivity. Methods Three rat subcutaneous implantation methods were evaluated in six Sprague Dawley rats. An acellular xenograft made from porcine pericardium was used as the tissue-scaffold. Three implantation methods were performed; 1) Suture method is where a tissue-scaffold was implanted by suturing its border to the external oblique muscle, 2) Control method is where a tissue-scaffold was implanted without any suturing or support, 3) Frame method is where a tissue-scaffold was attached to a circular frame composed of polycaprolactone (PCL) biomaterial and placed subcutaneously. After 1 and 4 weeks, tissue-scaffolds were explanted and evaluated by hematoxylin and eosin (H&E), Masson’s trichrome, Picrosirius Red, transmission electron microscopy (TEM), immunohistochemistry, and mechanical testing. Results Macroscopically, tissue-scaffold degradation with the suture method and tissue-scaffold folding with the control method were observed after 4 weeks. In comparison, the frame method demonstrated intact tissue scaffolds after 4 weeks. H&E staining showed progressive cell repopulation over the course of the experiment in all groups with acute and chronic inflammation observed in suture and control methods throughout the duration of the study. Immunohistochemistry quantification of CD3, CD 31, CD 34, CD 163, and αSMA showed a statistically significant differences between the suture, control and frame methods (P < 0.05) at both time points. The average tensile strength was 4.03 ± 0.49, 7.45 ± 0.49 and 5.72 ± 1.34 (MPa) after 1 week and 0.55 ± 0.26, 0.12 ± 0.03 and 0.41 ± 0.32 (MPa) after 4 weeks in the suture, control, and frame methods; respectively. TEM analysis showed an increase in inflammatory cells in both suture and control methods following implantation. Conclusion Rat subcutaneous implantation with the frame method was performed with success and ease. The surgical approach used for the frame technique was found to be the best methodology for in vivo evaluation of tissue engineered acellular scaffolds, where the frame method did not compromise mechanical strength, but it reduced inflammation significantly.
Collapse
|
8
|
Chen Z, Bachhuka A, Wei F, Wang X, Liu G, Vasilev K, Xiao Y. Nanotopography-based strategy for the precise manipulation of osteoimmunomodulation in bone regeneration. NANOSCALE 2017; 9:18129-18152. [PMID: 29143002 DOI: 10.1039/c7nr05913b] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Immune cells play vital roles in regulating bone dynamics. Successful bone regeneration requires a favourable osteo-immune environment. The high plasticity and diversity of immune cells make it possible to manipulate the osteo-immune response of immune cells, thus modulating the osteoimmune environment and regulating bone regeneration. With the advancement in nanotechnology, nanotopographies with different controlled surface properties can be fabricated. On tuning the surface properties, the osteo-immune response can be precisely modulated. This highly tunable characteristic and immunomodulatory effects make nanotopography a promising strategy to precisely manipulate osteoimmunomdulation for bone tissue engineering applications. This review first summarises the effects of the immune response during bone healing to show the importance of regulating the immune response for the bone response. The plasticity of immune cells is then reviewed to provide rationales for manipulation of the osteoimmune response. Subsequently, we highlight the current types of nanotopographies applied in bone biomaterials and their fabrication techniques, and explain how these nanotopographies modulate the immune response and the possible underlying mechanisms. The effects of immune cells on nanotopography-mediated osteogenesis are emphasized, and we propose the concept of "nano-osteoimmunomodulation" to provide a valuable strategy for the development of nanotopographies with osteoimmunomodulatory properties that can precisely regulate bone dynamics.
Collapse
Affiliation(s)
- Zetao Chen
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong, People's Republic of China
| | | | | | | | | | | | | |
Collapse
|
9
|
Chen Z, Ni S, Han S, Crawford R, Lu S, Wei F, Chang J, Wu C, Xiao Y. Nanoporous microstructures mediate osteogenesis by modulating the osteo-immune response of macrophages. NANOSCALE 2017; 9:706-718. [PMID: 27959374 DOI: 10.1039/c6nr06421c] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The osteoimmune environment plays indispensable roles in bone regeneration because the early immune environment that exists during the regenerative process promotes the recruitment and differentiation of osteoblastic lineage cells. The response of immune cells growing on nanotopographic surfaces and the microenvironment they generate should be considered when evaluating nanotopography-mediated osteogenesis, which are topics that are generally neglected in the field. In this study, we investigated the modulatory effects of nanoporous anodic alumina with different sized pores on macrophage responses and their subsequent effects on the osteogenic differentiation of bone marrow stromal cells (BMSCs). The nanopore structure and the pore size were found to be important adhesive cues for macrophages, which affected their spreading and cell shape, subsequently regulated the expression and activation of autophagy pathway components (LC3A/B, Beclin-1, Atg3, Atg7, and P62) and modulated the inflammatory response, osteoclastic activities, and release of osteogenic factors. Subsequently, the osteogenic pathways (Wnt and BMP) of BMSCs were found to be regulated by different nanopore-induced inflammatory environments, which affected the osteogenic differentiation outcomes. This study is the first to emphasize the effects of immune cells on nanotopography-mediated osteogenesis, which could lead to a new strategy for the development of advanced nanobiomaterials for tissue engineering, nanomedicine and immunotherapeutic applications.
Collapse
Affiliation(s)
- Zetao Chen
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong, People's Republic of China and Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| | - Siyu Ni
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University Shanghai, 201620, People's Republic of China
| | - Shengwei Han
- Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| | - Ross Crawford
- Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| | - Shifeier Lu
- Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| | - Fei Wei
- Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| | - Jiang Chang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
| | - Chengtie Wu
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, People's Republic of China.
| | - Yin Xiao
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University and Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510055, Guangdong, People's Republic of China and Institute of Health and Biomedical Innovation & the Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane 4059, Australia.
| |
Collapse
|
10
|
de Peppo GM, Agheli H, Karlsson C, Ekström K, Brisby H, Lennerås M, Gustafsson S, Sjövall P, Johansson A, Olsson E, Lausmaa J, Thomsen P, Petronis S. Osteogenic response of human mesenchymal stem cells to well-defined nanoscale topography in vitro. Int J Nanomedicine 2014; 9:2499-515. [PMID: 24904210 PMCID: PMC4039423 DOI: 10.2147/ijn.s58805] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Patterning medical devices at the nanoscale level enables the manipulation of cell behavior and tissue regeneration, with topographic features recognized as playing a significant role in the osseointegration of implantable devices. METHODS In this study, we assessed the ability of titanium-coated hemisphere-like topographic nanostructures of different sizes (approximately 50, 100, and 200 nm) to influence the morphology, proliferation, and osteogenic differentiation of human mesenchymal stem cells (hMSCs). RESULTS We found that the proliferation and osteogenic differentiation of hMSCs was influenced by the size of the underlying structures, suggesting that size variations in topographic features at the nanoscale level, independently of chemistry, can be exploited to control hMSC behavior in a size-dependent fashion. CONCLUSION Our studies demonstrate that colloidal lithography, in combination with coating technologies, can be exploited to investigate the cell response to well defined nanoscale topography and to develop next-generation surfaces that guide tissue regeneration and promote implant integration.
Collapse
Affiliation(s)
- Giuseppe Maria de Peppo
- The New York Stem Cell Foundation Research Institute, New York, NY, USA
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Hossein Agheli
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Camilla Karlsson
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Karin Ekström
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Helena Brisby
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Department of Orthopaedics, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
| | - Maria Lennerås
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Stefan Gustafsson
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Applied Physics, Chalmers University of Technology, Göteborg, Sweden
| | - Peter Sjövall
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Applied Physics, Chalmers University of Technology, Göteborg, Sweden
- Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Borås, Sweden
| | - Anna Johansson
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Eva Olsson
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Applied Physics, Chalmers University of Technology, Göteborg, Sweden
| | - Jukka Lausmaa
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Borås, Sweden
| | - Peter Thomsen
- Department of Biomaterials, Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
| | - Sarunas Petronis
- BIOMATCELL VINN Excellence Center of Biomaterials and Cell Therapy, University of Gothenburg, Göteborg, Sweden
- Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Borås, Sweden
| |
Collapse
|
11
|
Wu C, Han P, Liu X, Xu M, Tian T, Chang J, Xiao Y. Mussel-inspired bioceramics with self-assembled Ca-P/polydopamine composite nanolayer: preparation, formation mechanism, improved cellular bioactivity and osteogenic differentiation of bone marrow stromal cells. Acta Biomater 2014; 10:428-38. [PMID: 24157695 DOI: 10.1016/j.actbio.2013.10.013] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/17/2013] [Accepted: 10/13/2013] [Indexed: 12/31/2022]
Abstract
The nanostructured surface of biomaterials plays an important role in improving their in vitro cellular bioactivity as well as stimulating in vivo tissue regeneration. Inspired by the mussel's adhesive versatility, which is thought to be due to the plaque-substrate interface being rich in 3,4-dihydroxy-l-phenylalamine (DOPA) and lysine amino acids, in this study we developed a self-assembly method to prepare a uniform calcium phosphate (Ca-P)/polydopamine composite nanolayer on the surface of β-tricalcium phosphate (β-TCP) bioceramics by soaking β-TCP bioceramics in Tris-dopamine solution. It was found that the addition of dopamine, reaction temperature and reaction time are three key factors inducing the formation of a uniform Ca-P/polydopamine composite nanolayer. The formation mechanism of a Ca-P/polydopamine composite nanolayer involved two important steps: (i) the addition of dopamine to Tris-HCl solution decreases the pH value and accelerates Ca and P ionic dissolution from the crystal boundaries of β-TCP ceramics; (ii) dopamine is polymerized to form self-assembled polydopamine film and, at the same time, nanosized Ca-P particles are mineralized with the assistance of polydopamine, in which the formation of polydopamine occurs simultaneously with Ca-P mineralization (formation of nanosized microparticles composed of calcium phosphate-based materials), and finally a self-assembled Ca-P/polydopamine composite nanolayer forms on the surface of the β-TCP ceramics. Furthermore, the formed self-assembled Ca-P/polydopamine composite nanolayer significantly enhances the surface roughness and hydrophilicity of β-TCP ceramics, and stimulates the attachment, proliferation, alkaline phosphate (ALP) activity and bone-related gene expression (ALP, OCN, COL1 and Runx2) of human bone marrow stromal cells. Our results suggest that the preparation of self-assembled Ca-P/polydopamine composite nanolayers is a viable method to modify the surface of biomaterials by significantly improving their surface physicochemical properties and cellular bioactivity for bone regeneration application.
Collapse
|
12
|
Filardo G, Kon E, Tampieri A, Cabezas-Rodríguez R, Di Martino A, Fini M, Giavaresi G, Lelli M, Martínez-Fernández J, Martini L, Ramírez-Rico J, Salamanna F, Sandri M, Sprio S, Marcacci M. New bio-ceramization processes applied to vegetable hierarchical structures for bone regeneration: an experimental model in sheep. Tissue Eng Part A 2013; 20:763-73. [PMID: 24099033 DOI: 10.1089/ten.tea.2013.0108] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Bone loss is still a major problem in orthopedics. The purpose of this experimental study is to evaluate the safety and regenerative potential of a new scaffold based on a bio-ceramization process for bone regeneration in long diaphyseal defects in a sheep model. The scaffold was obtained by transformation of wood pieces into porous biomorphic silicon carbide (BioSiC®). The process enabled the maintenance of the original wood microstructure, thus exhibiting hierarchically organized porosity and high mechanical strength. To improve cell adhesion and osseointegration, the external surface of the hollow cylinder was made more bioactive by electrodeposition of a uniform layer of collagen fibers that were mineralized with biomimetic hydroxyapatite, whereas the internal part was filled with a bio-hybrid HA/collagen composite. The final scaffold was then implanted in the metatarsus of 15 crossbred (Merinos-Sarda) adult sheep, divided into 3 groups: scaffold alone, scaffold with platelet-rich plasma (PRP) augmentation, and scaffold with bone marrow stromal cells (BMSCs) added during implantation. Radiological analysis was performed at 4, 8, 12 weeks, and 4 months, when animals were sacrificed for the final radiological, histological, and histomorphometric evaluation. In all tested treatments, these analyses highlighted the presence of newly formed bone at the bone scaffolds' interface. Although a lack of substantial effect of PRP was demonstrated, the scaffold+BMSC augmentation showed the highest value of bone-to-implant contact and new bone growth inside the scaffold. The findings of this study suggest the potential of bio-ceramization processes applied to vegetable hierarchical structures for the production of wood-derived bone scaffolds, and document a suitable augmentation procedure in enhancing bone regeneration, particularly when combined with BMSCs.
Collapse
Affiliation(s)
- Giuseppe Filardo
- 1 Laboratory of Biomechanics, Rizzoli Orthopaedic Institute , Bologna, Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Bonartsev AP, Yakovlev SG, Zharkova II, Boskhomdzhiev AP, Bagrov DV, Myshkina VL, Makhina TK, Kharitonova EP, Samsonova OV, Feofanov AV, Voinova VV, Zernov AL, Efremov YM, Bonartseva GA, Shaitan KV, Kirpichnikov MP. Cell attachment on poly(3-hydroxybutyrate)-poly(ethylene glycol) copolymer produced by Azotobacter chroococcum 7B. BMC BIOCHEMISTRY 2013; 14:12. [PMID: 23692611 PMCID: PMC3724502 DOI: 10.1186/1471-2091-14-12] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 04/19/2013] [Indexed: 11/18/2022]
Abstract
BACKGROUND The improvement of biomedical properties, e.g. biocompatibility, of poly(3-hydroxyalkanoates) (PHAs) by copolymerization is a promising trend in bioengineering. We used strain Azotobacter chroococcum 7B, an effective producer of PHAs, for biosynthesis of not only poly(3-hydroxybutyrate) (PHB) and its main copolymer, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHB-HV), but also alternative copolymer, poly(3-hydroxybutyrate)-poly(ethylene glycol) (PHB-PEG). RESULTS In biosynthesis we used sucrose as the primary carbon source and valeric acid or poly(ethylene glycol) 300 (PEG 300) as additional carbon sources. The chemical structure of PHB-PEG and PHB-HV was confirmed by 1H nuclear-magnetic resonance (1H NMR) analysis. The physico-chemical properties (molecular weight, crystallinity, hydrophilicity, surface energy) and surface morphology of films from PHB copolymers were studied. To study copolymers biocompatibility in vitro the protein adsorption and COS-1 fibroblasts growth on biopolymer films by XTT assay were analyzed. Both copolymers had changed physico-chemical properties compared to PHB homopolymer: PHB-HV and PHB-PEG had less crystallinity than PHB; PHB-HV was more hydrophobic than PHB in contrast to PHB-PEG appeared to have greater hydrophilicity than PHB; whereas the morphology of polymer films did not differ significantly. The protein adsorption to PHB-PEG was greater and more uniform than to PHB and PHB-PEG copolymer promoted better growth of COS-1 fibroblasts compared with PHB homopolymer. CONCLUSIONS Thus, despite low EG-monomers content in bacterial origin PHB-PEG copolymer, this polymer demonstrated significant improvement in biocompatibility in contrast to PHB and PHB-HV copolymers, which may be coupled with increased protein adsorption and hydrophilicity of PEG-containing copolymer.
Collapse
Affiliation(s)
- Anton P Bonartsev
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Sergey G Yakovlev
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Irina I Zharkova
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | | | - Dmitrii V Bagrov
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | - Vera L Myshkina
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Tatiana K Makhina
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Elena P Kharitonova
- Faculty of Physics, M.V.Lomonosov Moscow State University, Leninskie gory, 1-2, Moscow, 119991, Russia
| | - Olga V Samsonova
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | - Alexey V Feofanov
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | - Vera V Voinova
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Anton L Zernov
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Yurii M Efremov
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | - Garina A Bonartseva
- A.N.Bach Institute of Biochemistry RAS, Leninskii av., 33-2, Moscow, 119071, Russia
| | - Konstantin V Shaitan
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| | - Michail P Kirpichnikov
- Faculty of Biology, M.V.Lomonosov Moscow State University, Leninskie gory, 1-12, Moscow, 119236, Russia
| |
Collapse
|
14
|
Prodanov L, Lamers E, Wolke J, Huiberts R, Jansen JA, Walboomers XF. In vivo comparison between laser-treated and grit blasted/acid etched titanium. Clin Oral Implants Res 2013; 25:234-9. [PMID: 23346926 DOI: 10.1111/clr.12109] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2012] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Laser profiling of titanium has been of considerable interest in the field of oral implantology. However, very few pre-clinical and clinical studies have been performed with laser-treated implants, especially focusing on isotropic roughness topography. The aim of the study was to compare the cortical bone response of Ti-implants discs treated with pico-sec pulsed laser (LAS) and conventional grit-blasted/acid-etched (GAE) method. MATERIALS AND METHODS Prior to the in vivo experiment, in vitro cell viability testing of the LAS surface treatment was preformed. Then, 5 mm diameter Titanium (Ti) discs treated with LAS and GAE method were implanted in a pre-validated rabbit tibia cortical bone model and assessed with histology and histomorphometric measurements. In total, eight New Zealand White adult female rabbits were used. RESULTS The in vitro cell viability testing with osteoblast-like cells confirmed cytocompatibility of the LAS surface treatment. Further, the rabbit experiment demonstrated a bone-to-implant contact of 68% (±17) for the laser-treated discs and 49% (±21) for the GAE discs 8 weeks after the implantation, which was statistically not different. CONCLUSION Laser surface treatment gives the same results to the grit-blasting/acid-etched method and thus is a valid alternative to conventional roughening for dental implant materials.
Collapse
Affiliation(s)
- Ljupcho Prodanov
- Department of Biomaterials, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands
| | | | | | | | | | | |
Collapse
|
15
|
Klymov A, Prodanov L, Lamers E, Jansen JA, Walboomers XF. Understanding the role of nano-topography on the surface of a bone-implant. Biomater Sci 2013; 1:135-151. [DOI: 10.1039/c2bm00032f] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
16
|
Vorup-Jensen T. On the roles of polyvalent binding in immune recognition: perspectives in the nanoscience of immunology and the immune response to nanomedicines. Adv Drug Deliv Rev 2012; 64:1759-81. [PMID: 22705545 DOI: 10.1016/j.addr.2012.06.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2012] [Revised: 06/06/2012] [Accepted: 06/08/2012] [Indexed: 12/31/2022]
Abstract
Immunology often conveys the image of large molecules, either in the soluble state or in the membrane of leukocytes, forming multiple contacts with a target for actions of the immune system. Avidity names the ability of a polyvalent molecule to form multiple connections of the same kind with ligands tethered to the same surface. Polyvalent interactions are vastly stronger than their monovalent equivalent. In the present review, the functional consequences of polyvalent interactions are explored in a perspective of recent theoretical advances in understanding the thermodynamics of such binding. From insights on the structural biology of soluble pattern recognition molecules as well as adhesion molecules in the cell membranes or in their proteolytically shed form, this review documents the prominent role of polyvalent interactions in making the immune system a formidable barrier to microbial infection as well as constituting a significant challenge to the application of nanomedicines.
Collapse
|
17
|
McLoughlin CE, Smith MJ, Auttachoat W, Bowlin GL, White KL. Evaluation of innate, humoral and cell-mediated immunity in mice following in vivo implantation of electrospun polycaprolactone. Biomed Mater 2012; 7:035015. [PMID: 22539041 DOI: 10.1088/1748-6041/7/3/035015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Electrospun polycaprolactone (EPCL) is currently being investigated for use in tissue engineering applications such as vascular grafts. However, the effects of electrospun polymers on systemic immune responses following in vivo exposure have not previously been examined. The work presented evaluates whether EPCL in either a microfibrous or nanofibrous form affects innate, humoral and/or cell-mediated immunity using a standard immunotoxicological testing battery. Holistic in vivo endpoints examined include the antibody-forming cell assay (AFC or plaque assay) and the delayed-type hypersensitivity response to Candida albicans. In addition, natural killer cell cytotoxic activity was assessed using an ex vivo assay and splenic cell population phenotypes were analyzed by flow cytometry for material exposure-related changes. Results indicated that 28 day subcutaneous implantation of EPCL, either in microfibrous or nanofibrous form, did not affect the systemic functions of the immune system in 12-16 week old female B6C3F1 mice.
Collapse
Affiliation(s)
- Colleen E McLoughlin
- Department of Biomedical Engineering, Virginia Commonwealth University, Richmond, VA, USA.
| | | | | | | | | |
Collapse
|
18
|
Zharkova I, Efremov Y, Bagrov D, Zernov A, Andreeva N, Shaitan K, Bonartsev A, Boschomjiev A, Makhina TK, Myshkina V, Voinova V, Yakovlev S, Filatova E, Ivanov E, Bonartseva G. The effect of poly(3-hydroxybutyrate) modification by poly(ethylene glycol) on the viability of cells grown on the polymer films. ACTA ACUST UNITED AC 2012; 58:579-91. [DOI: 10.18097/pbmc20125805579] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A biodegradable polymer of bacterial origin, poly(3-hydroxybutyrate) (PHB), is intensively studied as biomaterial for tissue engineering. However, factors determining its biocompatibility still require better understanding. To analyze the PHB films biocompatibility, the polymer material was modified by hydrophilic polymer, poly(ethylene glycol) 300 (PEG). The blends PHB/PEG with different PEG content (10, 20, 30 and 50%) were produced by subsequent incubation in water resulted in removal of 95% PEG. The surface roughness and hydrophilicity were studied by atomic force microscopy (AFM) and contact angle "water-polymer" measurement, respectively. The film biocompatibility on cell culture of COS-1 fibroblasts was studied in vitro. It was shown that both roughness and hydrophobicity are directly proportional to initial PEG content in the PHB/PEG blends. The growth rate of COS-1 fibroblasts on polymer films is determined by combination of two basic physicochemical properties of the polymer surface: the roughness and hydrophilicity. The optimal roughness requred for COS-1 cells growth is the average roughness more than 25 nm, whereas the limit values of the contact angle "water-polymer" that was responsible for relatively high cell viability were not found. These data indicate that the film surface roughness had the greatest effect on the cell growth, whereas the increase in the polymer surface hydrophilicity caused the additional positive effect on viability of attached cells. Thus, the modification of PHB polymer material by PEG resulted in the improved viability of cells cultivated on the polymer films in vitro. The obtained data can be used for development of such medical devices as surgeon patches and periodontal membranes.
Collapse
Affiliation(s)
- I.I. Zharkova
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - Yu.M. Efremov
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - D.V. Bagrov
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - A.L. Zernov
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - N.V. Andreeva
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - K.V. Shaitan
- Faculty of Biology, M.V. Lomonosov Moscow State University
| | - A.P. Bonartsev
- Lomonosov Moscow State University
Bakh Institute of Biochemistry RAS
| | | | | | | | - V.V. Voinova
- Lomonosov Moscow State University
Bakh Institute of Biochemistry RAS
| | | | | | - E.A. Ivanov
- Bakh Institute of Biochemistry RAS, Moscow, Russia
| | | |
Collapse
|
19
|
Palmquist A, Johansson A, Suska F, Brånemark R, Thomsen P. Acute Inflammatory Response to Laser‐Induced Micro‐ and Nano‐Sized Titanium Surface Features. Clin Implant Dent Relat Res 2011; 15:96-104. [DOI: 10.1111/j.1708-8208.2011.00361.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anders Palmquist
- Researcher, Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden
| | - Anna Johansson
- biomedical scientist, Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden
| | - Felicia Suska
- research, Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden
| | - Rickard Brånemark
- orthopaedic surgeon, Department of Orthopaedics, Sahlgrenska University Hospital, Göteborg, Sweden
| | - Peter Thomsen
- professor, Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden, and Institute of Biomaterials and Cell Therapy, Göteborg, Sweden
| |
Collapse
|
20
|
Palmquist A, Emanuelsson L, Brånemark R, Thomsen P. Biomechanical, histological and ultrastructural analyses of laser micro- and nano-structured titanium implant after 6 months in rabbit. J Biomed Mater Res B Appl Biomater 2011; 97:289-98. [PMID: 21394900 DOI: 10.1002/jbm.b.31814] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 11/25/2010] [Accepted: 12/19/2010] [Indexed: 11/08/2022]
Abstract
Short-term, experimental studies of partly laser-modified implants with nano-scale surface topographical features have recently shown a considerable increase in the biomechanical anchorage to bone. The aim of this study is to evaluate the biomechanical and bone-bonding ability of partly laser-modified implants compared with machined implants after a healing period of 6 months in a rabbit model. The results showed a 170% increase in removal torque. Histology and scanning electron microscopy demonstrated osseointegration for both implant types, but also revealed a different fracture pattern at the interface and in the bone. Transmission electron microscopy and chemical analysis showed coalescence between mineralized tissue and the nano-structured surface of the laser modified implant. Taken together, the results indicate that nano-structured surfaces promote in vivo long-term bone bonding and interface strength.
Collapse
Affiliation(s)
- Anders Palmquist
- Department of Biomaterials, Sahlgrenska Academy at University of Gothenburg, Göteborg, Sweden.
| | | | | | | |
Collapse
|
21
|
Anselme K, Davidson P, Popa A, Giazzon M, Liley M, Ploux L. The interaction of cells and bacteria with surfaces structured at the nanometre scale. Acta Biomater 2010; 6:3824-46. [PMID: 20371386 DOI: 10.1016/j.actbio.2010.04.001] [Citation(s) in RCA: 451] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 03/30/2010] [Accepted: 04/01/2010] [Indexed: 12/22/2022]
Abstract
The current development of nanobiotechnologies requires a better understanding of cell-surface interactions on the nanometre scale. Recently, advances in nanoscale patterning and detection have allowed the fabrication of appropriate substrates and the study of cell-substrate interactions. In this review we discuss the methods currently available for nanoscale patterning and their merits, as well as techniques for controlling the surface chemistry of materials at the nanoscale without changing the nanotopography and the possibility of truly characterizing the surface chemistry at the nanoscale. We then discuss the current knowledge of how a cell can interact with a substrate at the nanoscale and the effect of size, morphology, organization and separation of nanofeatures on cell response. Moreover, cell-substrate interactions are mediated by the presence of proteins adsorbed from biological fluids on the substrate. Many questions remain on the effect of nanotopography on protein adsorption. We review papers related to this point. As all these parameters have an influence on cell response, it is important to develop specific studies to point out their relative influence, as well as the biological mechanisms underlying cell responses to nanotopography. This will be the basis for future research in this field. An important topic in tissue engineering is the effect of nanoscale topography on bacteria, since cells have to compete with bacteria in many environments. The limited current knowledge of this topic is also discussed in the light of using topography to encourage cell adhesion while limiting bacterial adhesion. We also discuss current and prospective applications of cell-surface interactions on the nanoscale. Finally, based on questions raised previously that remain to be solved in the field, we propose future directions of research in materials science to help elucidate the relative influence of the physical and chemical aspects of nanotopography on bacteria and cell response with the aim of contributing to the development of nanobiotechnologies.
Collapse
|
22
|
Glia activation induced by peripheral administration of aluminum oxide nanoparticles in rat brains. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2009; 5:473-9. [DOI: 10.1016/j.nano.2009.01.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2008] [Revised: 12/21/2008] [Accepted: 01/16/2009] [Indexed: 11/21/2022]
|
23
|
Jones KS. Assays on the influence of biomaterials on allogeneic rejection in tissue engineering. TISSUE ENGINEERING PART B-REVIEWS 2009; 14:407-17. [PMID: 18826337 DOI: 10.1089/ten.teb.2008.0264] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
In tissue engineering, innate responses to biomaterial scaffolds will affect rejection of allogeneic cells. Biomaterials directly influence innate and adaptive immune cell adhesion, reactive oxygen intermediate production, cytokine secretion, nuclear factor-kappa B nuclear translocation, gene expression, and cell surface markers, all of which are likely to affect allogeneic rejection responses. A major goal in tissue engineering is to induce transplant tolerance, potentially by manipulating the biomaterial component. This review describes methods of measuring responses of macrophages, dendritic cells, and T cells stimulated in vitro and in vivo and addresses key factors in assay development. Such tests include mixed leukocyte reactions, enzyme-linked immunosorbent spot assays, trans-vivo delayed-type hypersensitivity assays, and measurement of dendritic cell subsets and anti-donor antibodies; we propose extending these studies to tissue engineering.
Collapse
Affiliation(s)
- Kim S Jones
- Department of Chemical Engineering, McMaster University, Hamilton, Ontario, Canada.
| |
Collapse
|
24
|
Curt S, Subirade M, Rouabhia M. Production and in vitro evaluation of soy protein-based biofilms as a support for human keratinocyte and fibroblast culture. Tissue Eng Part A 2009; 15:1223-32. [PMID: 18939936 DOI: 10.1089/ten.tea.2008.0157] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This study presents results on soy protein isolate (SPI) biofilm production and the corresponding effect on the stability and toxicity of the derived films. SPI biofilms were prepared from SPI chemically treated with formaldehyde at various concentrations (0%, 1%, 2%, and 3%) as cross-linking agents. In vitro SPI biofilm degradation was evaluated as a function of water absorption leading to weight and size modifications. SPI biofilm toxicity was determined as a function of human keratinocyte and fibroblast adhesion, viability, and proliferation. Cytokine gene expression supported this using reverse transcriptase polymerase chain reaction techniques. Our results confirm that SPI can be used to produce biofilms. The resulting SPI biofilms without formaldehyde swell significantly, which leads to their physical instability. Formaldehyde treatment enhanced the mechanical properties of these biofilms by covalently cross-linking polypeptide chains. The decreased water absorption was dependent on the amount of formaldehyde present. SPI biofilms with 2% and 3% formaldehyde were highly stable and easier to manipulate than those with 0% and 1% formaldehyde. Tissue culture analyses revealed that the SPI biofilms without formaldehyde were non-toxic to human cells (keratinocytes and fibroblasts). The presence of formaldehyde in biofilms did not have any effects on cell viability, adhesion, or proliferation. This was supported by the high level of messenger RNA expression of interleukin-1 beta (IL-1beta) and tumor necrosis factor alpha by the keratinocytes and of IL-6 and IL-8 by the fibroblasts. Overall, we produced a stable, non-toxic soy protein support, which may be of potential interest in medical applications such as cell culture matrices and damaged tissue replacement.
Collapse
Affiliation(s)
- Sèverine Curt
- Groupe de Recherche en Ecologie Buccale, Faculté de Médecine Dentaire, Université Laval, Québec, Canada
| | | | | |
Collapse
|
25
|
Wei X, Hu YJ, Xie WP, Lin RL, Chen GQ. Influence of poly(3-hydroxybutyrate-co-4-hydroxybutyrate-co-3-hydroxyhexanoate) on growth and osteogenic differentiation of human bone marrow-derived mesenchymal stem cells. J Biomed Mater Res A 2009; 90:894-905. [DOI: 10.1002/jbm.a.32146] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|