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Karanfil AS, Louis F, Sowa Y, Matsusaki M. ECM proteins and cationic polymers coating promote dedifferentiation of patient-derived mature adipocytes to stem cells. Biomater Sci 2023; 11:7623-7638. [PMID: 37830400 DOI: 10.1039/d3bm00934c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Reprogramming of mature adipocytes is an attractive research area due to the plasticity of these cells. Mature adipocytes can be reprogrammed in vitro, transforming them into dedifferentiated fat cells (DFATs), which are considered a new type of stem cell, and thereby have a high potential for use in tissue engineering and regenerative medicine. However, there are still no reports or findings on in vitro controlling the dedifferentiation. Although ceiling culture performed in related studies is a relatively simple method, its yield is low and does not allow manipulation of mature adipocytes to increase or decrease the dedifferentiation. In this study, to understand the role of physicochemical surface effects on the dedifferentiation of patient-derived mature adipocytes, the surfaces of cell culture flasks were coated with extracellular matrix, basement membrane proteins, and cationic/anionic polymers. Extracellular matrix such as fibronectin and collagen type I, and basement membrane proteins such as collagen type IV and laminin strongly promoted dedifferentiation of mature adipocytes, with laminin showing the highest effect with a DFAT ratio of 2.98 (±0.84). Interestingly, cationic polymers also showed a high dedifferentiation effect, but anionic polymers did not, and poly(diallyl dimethylammonium chloride) showed the highest DFAT ratio of 2.27 (±2.8) among the cationic polymers. Protein assay results revealed that serum proteins were strongly adsorbed on the surfaces of the cationic polymer coating, including inducing high mature adipocyte adhesion. This study demonstrates for the first time the possibility of regulating the transformation of mature adipocytes to DFAT stem cells by controlling the physicochemical properties of the surface of conventional cell culture flasks.
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Affiliation(s)
- Aslı Sena Karanfil
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Japan.
| | - Fiona Louis
- Joint Research Laboratory (TOPPAN) for Advanced Cell Regulatory Chemistry, Graduate School of Engineering, Osaka University, Japan
| | - Yoshihiro Sowa
- Department of Plastic and Reconstructive Surgery, Graduate School of Medical Sciences, Kyoto Prefectural University of Medicine, Japan
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Kyoto University, Japan
| | - Michiya Matsusaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Japan.
- Joint Research Laboratory (TOPPAN) for Advanced Cell Regulatory Chemistry, Graduate School of Engineering, Osaka University, Japan
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2
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Demirel M, Aslan N, Aksakal B, Arslan ME. Fabrication of hydroxyapatite-based nano-gold and nano-silver-doped bioceramic bone grafts: Enhanced mechanostructure, cell viability, and nuclear abnormality properties. J Biomed Mater Res B Appl Biomater 2023; 111:1386-1397. [PMID: 36891913 DOI: 10.1002/jbm.b.35242] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/10/2023] [Accepted: 02/23/2023] [Indexed: 03/10/2023]
Abstract
In this study, nano-gold (nAu) and nano-silver (nAg) were doped at the molar ratios of Molar5-Molar30 to the Hydroxyapatite (HAp)-based bioceramic bone graft synthesized by the sol-gel method. The effects of nAu and nAg on structural, mechanical, cell viability, and nuclear abnormality of the synthesized bioceramic grafts were evaluated. The chemical and morphological properties of the bone grafts after production were examined through XRD and SEM-EDX analyses and mechanical tests. To determine the biocompatibility of the bone grafts, cell viability tests were performed using human fibroblast cells. In the cytotoxicity analyses, only HAp and HAp-nAu5 grafts did not show toxicological properties at any concentration, while HAp-nAg5 among the nAg-containing grafts gave the best results at the 200-100 μg/mL concentrations and showed significant cytotoxicity in human fibroblast cells. The other nAu-containing grafts showed toxicological properties in the concentration range of 200-50 μg/mL and nAg-containing grafts in the concentration range of 200-100 μg/mL against the negative control. The micronucleus (MN) analyses showed that the lowest total MN and L (lobbed) amounts, while the lowest total N (notched) amount, was obtained from the only HAp graft. It was found that the nAg-doped bone grafts gave higher total MN, L, and N amounts compared to the nAu-doped bone grafts. Furthermore, while the mean nuclear abnormality (NA) values of all grafts gave close results, the highest values were again obtained from the nAg-doped bone grafts.
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Affiliation(s)
- M Demirel
- Vocational School of Technical Science, Mechanical and Mater Technology, Adiyaman University, Adiyaman, Turkey
| | - N Aslan
- Department of Metallurgical and Materials Engineering, Munzur University, Tunceli, Turkey
| | - B Aksakal
- School of Civil Aviation, Firat University, Elazig, Turkey
| | - M E Arslan
- Faculty of Science, Department of Molecular Biology and Genetics, Erzurum Technical University, Erzurum, Turkey
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Abdelghafour MM, Orbán Á, Deák Á, Lamch Ł, Frank É, Nagy R, Ziegenheim S, Sipos P, Farkas E, Bari F, Janovák L. Biocompatible poly(ethylene succinate) polyester with molecular weight dependent drug release properties. Int J Pharm 2022; 618:121653. [PMID: 35278604 DOI: 10.1016/j.ijpharm.2022.121653] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 02/04/2022] [Accepted: 03/07/2022] [Indexed: 01/05/2023]
Abstract
In the present study, we demonstrate that well-known molecular weight-dependent solubility properties of a polymer can also be used in the field of controlled drug delivery. To prove this, poly(ethylene succinate) (PES) polyesters with polycondensation time regulated molecular weights were synthesized via catalyst-free direct polymerization in an equimolar ratio of ethylene glycol and succinic acid monomers at 185 °C. DSC and contact angle measurements revealed that increasing the molecular weight (Mw, 4.3-5.05 kDa) through the polymerization time (40-80 min) increased the thermal stability (Tm= ∼61-80 °C) and slightly the hydrophobicity (Θw= ∼27-41°) of the obtained aliphatic polyester. Next, this biodegradable polymer was used for the encapsulation of Ca2+ channel blocker Nimodipine (NIMO) to overcome the poor water solubility and enhance the bioavailability of the drug. The drug/ polymer compatibility was proved by the means of solubility (δ) and Flory-Huggins interaction (miscibility) parameters (χ). The nanoprecipitation encapsulation of NIMO into PES with increasing Mw resulted in the formation of spherical 270 ± 103 nm NIMO-loaded PES nanoparticles (NPs). Furthermore, based on the XRD measurements, the encapsulated form of NIMO-loaded PES NPs showed lower drug crystallinity, which enhanced not only the water solubility but even the water stability of the NIMO in an aqueous medium. The in-vitro drug release experiments demonstrated that the release of NIMO drug could be accelerated or even prolonged by the molecular weights of PES as well. Due to the low crystallinity of PES polyester and low particle size of the encapsulated NIMO drug led to enhance solubility and releasing process of NIMO from PES with lower Mw (4.3 kDa and 4.5 kDa) compared to pure crystalline NIMO. However, further increasing the molecular weight (5.05 kDa) was already reduced the amount of drug release that provides the prolonged therapeutic effect and enhances the bioavailability of the NIMO drug.
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Affiliation(s)
- Mohamed M Abdelghafour
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged, Hungary; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
| | - Ágoston Orbán
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged, Hungary
| | - Ágota Deák
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged, Hungary
| | - Łukasz Lamch
- Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Éva Frank
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary
| | - Roland Nagy
- Department of MOL Department of Hydrocarbon and Coal Processing, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, H-8200 Veszprém, Hungary
| | - Szilveszter Ziegenheim
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Pál Sipos
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Eszter Farkas
- Department of Medical Physics and Informatics, Faculty of Medicine & Faculty of Science and Informatics, University of Szeged, Korányi Fasor 9, H-6720 Szeged, Hungary; HCEMM-USZ Cerebral Blood Flow and Metabolism Research Group, University of Szeged, Dugonics Square 13, H-6720 Szeged, Hungary; Department of Cell Biology and Molecular Medicine, Faculty of Science and Informatics & Faculty of Medicine, University of Szeged, Somogyi Str. 4, H-6720 Szeged, Hungary
| | - Ferenc Bari
- Department of Medical Physics and Informatics, Faculty of Medicine & Faculty of Science and Informatics, University of Szeged, Korányi Fasor 9, H-6720 Szeged, Hungary
| | - László Janovák
- Department of Physical Chemistry and Materials Science, University of Szeged, H-6720, Rerrich Béla tér 1, Szeged, Hungary.
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Choi E, Bae S, Kim D, Yang GH, Lee K, You HJ, Kang HJ, Gwak SJ, An S, Jeon H. Characterization and intracellular mechanism of electrospun poly (ε-caprolactone) (PCL) fibers incorporated with bone-dECM powder as a potential membrane for guided bone regeneration. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.11.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Friguglietti J, Das S, Le P, Fraga D, Quintela M, Gazze SA, McPhail D, Gu J, Sabek O, Gaber AO, Francis LW, Zagozdzon-Wosik W, Merchant FA. Novel Silicon Titanium Diboride Micropatterned Substrates for Cellular Patterning. Biomaterials 2020; 244:119927. [DOI: 10.1016/j.biomaterials.2020.119927] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 02/17/2020] [Accepted: 02/26/2020] [Indexed: 12/13/2022]
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Kaniuk Ł, Krysiak ZJ, Metwally S, Stachewicz U. Osteoblasts and fibroblasts attachment to poly(3-hydroxybutyric acid-co-3-hydrovaleric acid) (PHBV) film and electrospun scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110668. [DOI: 10.1016/j.msec.2020.110668] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/07/2019] [Accepted: 01/13/2020] [Indexed: 01/08/2023]
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Lerman MJ, Smith BT, Gerald AG, Santoro M, Fookes JA, Mikos AG, Fisher JP. Aminated 3D Printed Polystyrene Maintains Stem Cell Proliferation and Osteogenic Differentiation. Tissue Eng Part C Methods 2020; 26:118-131. [PMID: 31971874 PMCID: PMC7041340 DOI: 10.1089/ten.tec.2019.0217] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 11/18/2019] [Indexed: 12/14/2022] Open
Abstract
As 3D printing becomes more common and the technique is used to build culture platforms, it is imperative to develop surface treatments for specific responses. The advantages of aminating and oxidizing polystyrene (PS) for human mesenchymal stem cell (hMSC) proliferation and osteogenic differentiation are investigated. We find that ammonia (NH3) plasma incorporates amines while oxygen plasma adds carbonyl and carboxylate groups. Across 2D, 3D, and 3D dynamic culture, we find that the NH3- treated surfaces encouraged cell proliferation. Our results show that the NH3-treated scaffold was the only treatment allowing dynamic proliferation of hMSCs with little evidence of osteogenic differentiation. With osteogenic media, particularly in 3D culture, we find the NH3 treatment encouraged greater and earlier expression of RUNX2 and ALP. The NH3-treated PS scaffolds support hMSC proliferation without spontaneous osteogenic differentiation in static and dynamic culture. This work provides an opportunity for further investigations into shear profiling and coculture within the developed culture system toward developing a bone marrow niche model.
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Affiliation(s)
- Max J. Lerman
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
| | - Brandon T. Smith
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Department of Bioengineering, MS-142 BioScience Research Collaborative, Rice University, Houston, Texas
| | - Anushka G. Gerald
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Marco Santoro
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - James A. Fookes
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Antonios G. Mikos
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Department of Bioengineering, MS-142 BioScience Research Collaborative, Rice University, Houston, Texas
| | - John P. Fisher
- Center for Engineering Complex Tissues, University of Maryland, College Park, Maryland
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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Ogueri KS, Jafari T, Escobar Ivirico JL, Laurencin CT. POLYMERIC BIOMATERIALS FOR SCAFFOLD-BASED BONE REGENERATIVE ENGINEERING. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019; 5:128-154. [PMID: 31423461 PMCID: PMC6697158 DOI: 10.1007/s40883-018-0072-0] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 06/28/2018] [Indexed: 10/28/2022]
Abstract
Reconstruction of large bone defects resulting from trauma, neoplasm, or infection is a challenging problem in reconstructive surgery. The need for bone grafting has been increasing steadily partly because of our enhanced capability to salvage limbs after major bone loss. Engineered bone graft substitutes can have advantages such as lack of antigenicity, high availability, and varying properties depending on the applications chosen for use. These favorable attributes have contributed to the rise of scaffold-based polymeric tissue regeneration. Critical components in the scaffold-based polymeric regenerative engineering approach often include 1. The existence of biodegradable polymeric porous structures with properties selected to promote tissue regeneration and while providing appropriate mechanical support during tissue regeneration. 2. Cellular populations that can influence and enhance regeneration. 3. The use of growth and morphogenetic factors which can influence cellular migration, differentiation and tissue regeneration in vivo. Biodegradable polymers constitute an attractive class of biomaterials for the development of scaffolds due to their flexibility in chemistry and their ability to produce biocompatible degradation products. This paper presents an overview of polymeric scaffold-based bone tissue regeneration and reviews approaches as well as the particular roles of biodegradable polymers currently in use.
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Affiliation(s)
- Kenneth S. Ogueri
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Tahereh Jafari
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Jorge L. Escobar Ivirico
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Cato T. Laurencin
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
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Gabbott CM, Sun T. Comparison of Human Dermal Fibroblasts and HaCat Cells Cultured in Medium with or without Serum via a Generic Tissue Engineering Research Platform. Int J Mol Sci 2018; 19:ijms19020388. [PMID: 29382087 PMCID: PMC5855610 DOI: 10.3390/ijms19020388] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/25/2018] [Accepted: 01/25/2018] [Indexed: 12/16/2022] Open
Abstract
A generic research platform with 2-dimensional (2D) cell culture technology, a 3-dimensional (3D) in vitro tissue model, and a scaled-down cell culture and imaging system in between, was utilized to address the problematic issues associated with the use of serum in skin tissue engineering. Human dermal fibroblasts (HDFs) and immortalized keratinocytes (HaCat cells) mono- or co-cultured in serum or serum-free medium were compared and analyzed via the platform. It was demonstrated that serum depletion had significant influence on the attachment of HaCat cells onto tissue culture plastic (TCP), porous substrates and cellulosic scaffolds, which was further enhanced by the pre-seeded HDFs. The complex structures formed by the HDFs colonized within the porous substrates and scaffolds not only prevented the seeded HaCat cells from filtering through the open pores, but also acted as cellular substrates for HaCat cells to attach onto. When mono-cultured on TCP, both HDFs and HaCat cells were less proliferative in medium without serum than with serum. However, both cell types were successfully co-cultured in 2D using serum-free medium if the initial cell seeding density was higher than 80,000 cells/cm2 (with 1:1 ratio). Based on the results from 2D cultures, co-culture of both cell types on modular substrates with small open pores (125 μm) and cellulosic scaffolds with open pores of varying sizes (50–300 µm) were then conducted successfully in serum-free medium. This study demonstrated that the generic research platform had great potential for in-depth understanding of HDFs and HaCat cells cultivated in serum-free medium, which could inform the processes for manufacturing skin cells or tissues for clinical applications.
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Affiliation(s)
- Christopher Michael Gabbott
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough LE11 3TU, UK.
| | - Tao Sun
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough LE11 3TU, UK.
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10
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Ghasemi-Mobarakeh L, Morshed M, Karbalaie K, Fesharaki MA, Nematallahi M, Nasr-Esfahani MH, Baharvand H. The Thickness of Electrospun Poly (ε-Caprolactone) Nanofibrous Scaffolds Influences Cell Proliferation. Int J Artif Organs 2018; 32:150-8. [DOI: 10.1177/039139880903200305] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nanofibrous scaffolds have morphological similarities to native extracellular matrix and have been considered as candidate scaffolds in tissue engineering. However, there is no report on the effect of the thickness of nanofibrous scaffold on cell behavior. In this study poly (∊-caprolactone) (PCL) nanofibrous scaffolds with thicknesses of 0.1 and 0.6 mm were fabricated by electrospinning. Properties of PCL nanofibrous scaffolds were measured by contact angle and air permeability measurements while the morphology of the nanofibers was observed by SEM. Mouse embryonal carcinoma stem cells (P19), monkey epithelial kidney cells (Vero), Chinese hamster ovary cells (CHO) and mouse mesenchymal stem cells (MSCs) were seeded on PCL nanofibrous scaffolds with thicknesses of 0.1 and 0.6 mm. Air permeability measurements showed that air permeability decreases with the increase in the thickness of nanofibrous scaffolds, and contact angle measurements revealed a contact angle of 118° for electrospun PCL nanofibers. The MTT assays showed that the proliferation of the cells was influenced by the thickness of the nanofibrous scaffold. Scaffolds with a thickness of 0.6 mm were found to provide a better substrate for cell proliferation, possibly due to more dimensional stability. Therefore, regardless of cell origin, thicker scaffolds provide a better substrate for cell proliferation, possibly due to the higher dimensional stability and tightness of thicker scaffolds.
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Affiliation(s)
- Laleh Ghasemi-Mobarakeh
- Department of Stem Cells, Cell Science Research Center, Royan Institute, Esfahan Campus, ACECR, Esfahan - Iran
- Department of Textile Engineering, Isfahan University of Technology, Esfahan - Iran
| | - Mohammad Morshed
- Department of Textile Engineering, Isfahan University of Technology, Esfahan - Iran
| | - Khadijeh Karbalaie
- Department of Stem Cells, Cell Science Research Center, Royan Institute, Esfahan Campus, ACECR, Esfahan - Iran
| | - Mehr-Afarin Fesharaki
- Department of Physiology, Medical School, Esfahan University of Medical Sciences, Esfahan - Iran
| | - Marziyeh Nematallahi
- Department of Stem Cells, Cell Science Research Center, Royan Institute, Esfahan Campus, ACECR, Esfahan - Iran
| | | | - Hossein Baharvand
- Department of Stem Cells, Cell Science Research Center, Royan Institute, ACECR, Tehran - Iran
- Department of Developmental Biology, University of Science and Culture, ACECR, Tehran - Iran
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12
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Aiyelabegan HT, Sadroddiny E. Fundamentals of protein and cell interactions in biomaterials. Biomed Pharmacother 2017; 88:956-970. [PMID: 28178627 DOI: 10.1016/j.biopha.2017.01.136] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/11/2017] [Accepted: 01/23/2017] [Indexed: 12/31/2022] Open
Abstract
The extracellular matrix (ECM) is an active and complex microenvironment with outstanding biomechanical, biophysical, and biochemical characteristics, which can indirectly or directly controls cell adhesion, migration, proliferation, and differentiation, as well as partaking in regeneration and homeostasis of organs and tissues. The ECM has captivated a great deal of attention with the rapid progress of tissue engineering (TE) in the field of regenerative medicine (RM). Approaches to TE, RM and cancer therapy center on the necessity to deliver cell signals to direct cell proliferation and differentiation. These "external signals" are induced from cell-cell, and cell-ECM, interactions, as well as from physico-chemical, mechanical stimuli and growth factors. With the advent of new biomaterials such as casein, we gave a general insight into cell-ECM protein interactions in biomaterials and their applications in TE, RM and cancer therapy. An account of the main ECM molecules and cellular receptors with emphasis on integrins and its ligands was given, their effect on the induction of particular signal transduction pathways is also elucidated.
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Affiliation(s)
- Hammed Tanimowo Aiyelabegan
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran; Department of Medical Biotechnology, School of Advanced Technologies in Medicine, International Campus-Tehran University of Medical Sciences (IC-TUMS), Tehran, Iran
| | - Esmaeil Sadroddiny
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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13
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Repair of calvarial bone defects in mice using electrospun polystyrene scaffolds combined with β-TCP or gold nanoparticles. Micron 2017; 93:29-37. [DOI: 10.1016/j.micron.2016.11.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 11/04/2016] [Accepted: 11/04/2016] [Indexed: 11/22/2022]
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14
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Dhawan U, Pan HA, Chu YH, Huang GS, Chen PC, Chen WL. Temporal Control of Osteoblast Cell Growth and Behavior Dictated by Nanotopography and Shear Stress. IEEE Trans Nanobioscience 2016; 15:704-712. [PMID: 28029616 DOI: 10.1109/tnb.2016.2605686] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Biomaterial design involves assessment of cellular response to nanotopography parameters such as shape, dimension of nanotopography features. Here, the effect of nanotopography alongside the in vivo factor, shear stress, on osteoblast cell behavior, is reported. Tantalum oxide nanodots of 50 or 100 nm diameter were engineered using anodized aluminum oxide as a template. Bare tantalum nitride coated silicon substrates were taken as control (flat). MG63 (osteoblast) cells were seeded for 72 hours on flat, 50 or 100 nm nanodots and modulation in cell morphology, cell viability and expression of integrins was studied. Cells displayed a well-extended morphology on 50 nm nanodots in contrast to an elongated morphology on 100 nm nanodots, as observed by scanning electron microscopy and immunofluorescence staining, thereby confirming the cellular response to different nanotopographies. Based on quantitative real-time polymerase chain reaction data, a greater fold change in the expression of α1 , α2 , α3 , α8 , α9 , [Formula: see text], β1 , β4 , β5 , β7 and β8 integrins was observed in cells cultured on 100 nm than on 50 nm nanodots. Moreover, in the presence of a shear stress of 2 dyne/cm2, a 52% increase in the cell viability after culturing the cells for 72 hours was observed on 100 nm nanodots as compared to 50 nm nanodots, thereby validating the effect of shear stress on cell behavior. Duration-of-culture experiments revealed 100 nm nanodots to be an ideal nanotopography choice to engineer optimized implant geometries for an ideal cell response. This study highlights the in vivo factors which need to be considered while designing nanotopographies for in vivo applications, for an ideal response as the cell-nanomaterial interface. Applications in the field of Biomedical, tissue engineering and cancer research are expected.
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15
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Vaquero S, Bossio C, Bellani S, Martino N, Zucchetti E, Lanzani G, Antognazza MR. Conjugated polymers for the optical control of the electrical activity of living cells. J Mater Chem B 2016; 4:5272-5283. [DOI: 10.1039/c6tb01129b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Different conjugated polymers are proposed as bio-optical interfaces. Selected polymers are capable to sustain thermal sterilization but provide different optical coupling with living cells.
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Affiliation(s)
- Susana Vaquero
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
| | - Caterina Bossio
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
| | - Sebastiano Bellani
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
- Politecnico di Milano
| | - Nicola Martino
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
- Politecnico di Milano
| | - Elena Zucchetti
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
- Politecnico di Milano
| | - Guglielmo Lanzani
- Center for Nano Science and Technology
- IIT@PoliMi
- 20133 Milano
- Italy
- Politecnico di Milano
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Felgueiras HP, Evans MD, Migonney V. Contribution of fibronectin and vitronectin to the adhesion and morphology of MC3T3-E1 osteoblastic cells to poly(NaSS) grafted Ti6Al4V. Acta Biomater 2015; 28:225-233. [PMID: 26415777 DOI: 10.1016/j.actbio.2015.09.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 08/27/2015] [Accepted: 09/25/2015] [Indexed: 10/23/2022]
Abstract
This study is focused on understanding the underlying mechanisms involved in the improved in vitro and in vivo responses of osteoblasts on poly(sodium styrene sulfonate) (poly(NaSS)) functionalized Ti6Al4V surfaces. We probed the contribution of cell-adhesive glycoproteins fibronectin (Fn) and vitronectin (Vn) in the initial adhesion of MC3T3-E1 osteoblastic cells to poly(NaSS) functionalized and control Ti6Al4V surfaces. Firstly, culture media containing serum depleted of Fn and Vn (DD) were used to establish the contribution of Fn and Vn in the adhesion and spreading of cells on poly(NaSS) grafted and control surfaces. Compared to ungrafted surfaces, poly(NaSS) grafted surfaces enhanced the levels of cell adhesion, cell spreading and the formation of intracellular actin cytoskeleton and focal contacts in serum treatments where Fn or Vn were present (FBS, DD+Fn, DD+Vn). Cell responses to Fn were more significant than to Vn. Secondly, blocking Fn and Vn integrin receptors using antibodies to α5β1 (Fn) and αvβ1 (Vn) showed that adhesion of cells to poly(NaSS) grafted surfaces principally involved the Fn integrin receptor α5β1. Thirdly, blocking of the heparin and cell-binding regions of Fn molecule (RGD, C-HB, N-HB) showed that grafting with poly(NaSS) altered the conformation of Fn. Together these outcomes explained why the presence of sulfonate (SO3(-)) groups grafted on the Ti6Al4V surface enhanced the early cell adhesion and spreading processes which determine clinical success for applications that require osseointegration. STATEMENT OF SIGNIFICANCE This study is devoted to the basic analysis of the mechanism at the origin of the improved in vitro and in vivo osteoblast cell responses exhibited by poly(sodium styrene sulfonate) (poly(NaSS)) functionalized Ti6Al4V surfaces. The aim was to probe the contribution of cell adhesive glycoproteins fibronectin and vitronectin in the initial adhesion of MC3T3-E1 osteoblastic cells to poly(NaSS) functionalized Ti6Al4V surfaces. The outcomes of this research explained why the presence of SO3(-) (sulfonate) groups grafted on the Ti6Al4V surface enhanced the early cell adhesion and spreading processes which determine clinical success for applications that require osseointegration. This work is a step further in the research of poly(NaSS), a very promising bioactive polymer with potential to the orthopedic and dental fields.
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Bagherifard S, Ghelichi R, Khademhosseini A, Guagliano M. Cell response to nanocrystallized metallic substrates obtained through severe plastic deformation. ACS APPLIED MATERIALS & INTERFACES 2014; 6:7963-7985. [PMID: 24755013 DOI: 10.1021/am501119k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cell-substrate interface is known to control the cell response and subsequent cell functions. Among the various biophysical signals, grain structure, which indicates the repeating arrangement of atoms in the material, has also proved to play a role of significant importance in mediating the cell activities. Moreover, refining the grain size through severe plastic deformation is known to provide the processed material with novel mechanical properties. The potential application of such advanced materials as biomedical implants has recently been evaluated by investigating the effect of different substrate grain sizes on a wide variety of cell activities. In this review, recent advances in biomedical applications of severe plastic deformation techniques are highlighted with special attention to the effect of the obtained nano/ultra-fine-grain size on cell-substrate interactions. Various severe plastic deformation techniques used for this purpose are discussed presenting a brief description of the mechanism for each process. The results obtained for each treatment on cell morphology, adhesion, proliferation, and differentiation, as well as the in vivo studies, are discussed. Finally, the advantages and challenges regarding the application of these techniques to produce multifunctional bio-implant materials are addressed.
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Affiliation(s)
- Sara Bagherifard
- Department of Mechanical Engineering, Politecnico di Milano , Via G. La Masa, 1, 20156, Milan, Italy
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Eubanks EJ, Tarle SA, Kaigler D. Tooth Storage, Dental Pulp Stem Cell Isolation, and Clinical Scale Expansion without Animal Serum. J Endod 2014; 40:652-7. [DOI: 10.1016/j.joen.2014.01.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 10/11/2013] [Accepted: 01/06/2014] [Indexed: 12/14/2022]
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Bahl S, Suwas S, Chatterjee K. The importance of crystallographic texture in the use of titanium as an orthopedic biomaterial. RSC Adv 2014. [DOI: 10.1039/c4ra05440g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Crystallographic texture can be used for enhancing the performance of orthopedic biomaterials by tuning bulk mechanical properties, corrosion resistance, cell proliferation and osteogenesis.
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Affiliation(s)
- Sumit Bahl
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore, India 560012
| | - Satyam Suwas
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore, India 560012
| | - Kaushik Chatterjee
- Department of Materials Engineering
- Indian Institute of Science
- Bangalore, India 560012
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Ghasemi-Mobarakeh L, Prabhakaran MP, Nematollahi M, Karbalaie K, Ramakrishna S, Nasr-Esfahani MH. Embryonic Stem Cell Differentiation to Cardiomyocytes on Nanostructured Scaffolds for Myocardial Tissue Regeneration. INT J POLYM MATER PO 2013. [DOI: 10.1080/00914037.2013.830247] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kharaziha M, Fathi M, Edris H. Effects of surface modification on the mechanical and structural properties of nanofibrous poly(ε-caprolactone)/forsterite scaffold for tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4512-9. [DOI: 10.1016/j.msec.2013.07.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 06/05/2013] [Accepted: 07/04/2013] [Indexed: 10/26/2022]
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Rivera-Chacon DM, Alvarado-Velez M, Acevedo-Morantes CY, Singh SP, Gultepe E, Nagesha D, Sridhar S, Ramirez-Vick JE. Fibronectin and vitronectin promote human fetal osteoblast cell attachment and proliferation on nanoporous titanium surfaces. J Biomed Nanotechnol 2013; 9:1092-7. [PMID: 23858975 DOI: 10.1166/jbn.2013.1601] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Improvements in osteoconduction of implant biomaterials require focusing on the bone-implant interface, which is a complex multifactorial system. Surface topography of implants plays a crucial role at this interface. Nanostructured surfaces have been shown to promote serum protein adsorption and osteoblast adhesion when compared to micro-structured surfaces for bone-implant materials. We studied the influence of the serum proteins fibronectin and vitronectin on the attachment and proliferation of osteoblasts onto nanostructured titania surfaces. Human fetal osteoblastic cells hFOB 1.19 were used as model osteoblasts and were grown on nanoporous TiO2 templates, using Ti6AI4V and commercially pure Ti substrates as controls. Results show a significant increase in cell proliferation'on nanoporous TiO2 over flat substrates. Initial cell attachment data exhibited a significant effect by either fibronectin or vitronectin on cell adhesion at the surface of any of the tested materials. In addition, the extent of cell adhesion was significantly different between the nanoporous TiO2 and both Ti6AI4V and commercially pure Ti substrates, with the first showing the highest surface coverage. There was no significant difference on osteoblast attachment or proliferation between the presence of fibronectin or vitronectin using any of the material substrates. Taken together, these results suggest that the increase in osteoblast attachment and proliferation shown on the nanoporous TiO2 is due to an increase in the adsorption of fibronectin and vitronectin because of the higher surface area and to an enhanced protein unfolding, which allows access to osteoblast binding motifs within these proteins.
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Affiliation(s)
- D M Rivera-Chacon
- Department of Physics, University of Puerto Rico, Mayaguez, PR 00680
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The effect of crystallographic orientation of titanium substrate on the structure and bioperformance of hydroxyapatite coatings. Colloids Surf B Biointerfaces 2013. [DOI: 10.1016/j.colsurfb.2012.10.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Implants in bone: part I. A current overview about tissue response, surface modifications and future perspectives. Oral Maxillofac Surg 2013; 18:243-57. [PMID: 23435578 DOI: 10.1007/s10006-013-0398-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 02/04/2013] [Indexed: 02/07/2023]
Abstract
PURPOSE The aim of study paper is to present an overview of osseointegration of dental implants, focusing on tissue response, surface modifications and future perspective. DISCUSSION Great progress has been made over the decades in the understanding of osseous peri-implant healing of dental implants, leading to the development of new implant materials and surfaces. However, failures and losses of implants are an indicator that there is room for improvement. Of particular importance is the understanding of the biological interaction between the implant and its surrounding bone. CONCLUSION The survival rates of dental implants in bone of over 90 % after 10 years show that they are an effective and well-established therapy option. However, new implant materials and surface modifications may be able to improve osseointegration of medical implants especially when the wound healing is compromised. Advanced techniques of evaluation are necessary to understand and validate osseointegration in these cases. An overview regarding the current state of the art in experimental evaluation of osseointegration of implants and implant material modifications will be given in Part II.
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Novin M, Faghihi S. Mouse bone marrow-derived mesenchymal stem cell response to nanostructured titanium substrates produced by high-pressure torsion. SURF INTERFACE ANAL 2012. [DOI: 10.1002/sia.5101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Mana Novin
- Tissue Engineering and Biomaterials Division; National Institute of Genetic Engineering and Biotechnology (NIGEB); PO box 14155-6343; Tehran; Iran
| | - Shahab Faghihi
- Tissue Engineering and Biomaterials Division; National Institute of Genetic Engineering and Biotechnology (NIGEB); PO box 14155-6343; Tehran; Iran
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Liu C, Zeng JB, Li SL, He YS, Wang YZ. Improvement of biocompatibility and biodegradability of poly(ethylene succinate) by incorporation of poly(ethylene glycol) segments. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.12.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Gassling V, Hedderich J, Açil Y, Purcz N, Wiltfang J, Douglas T. Comparison of platelet rich fibrin and collagen as osteoblast-seeded scaffolds for bone tissue engineering applications. Clin Oral Implants Res 2011; 24:320-8. [PMID: 22092514 DOI: 10.1111/j.1600-0501.2011.02333.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2011] [Indexed: 12/15/2022]
Abstract
OBJECTIVES The loss of jaw bone caused by different kinds of pathologies leads to dysfunction and reduced quality of life in affected patients. Thus, the pivotal goal in bone tissue engineering is to reconstruct these defects. The essential precondition for new tissue generation is an extracellular matrix which acts as a scaffold so that cells can migrate, differentiate, and proliferate. Fibrin, a biopolymer responsible for blood clot formation, has been shown to be suitable for tissue engineering applications. The aim of the present study is a comparison of platelet rich fibrin (PRF) with the commonly used collagen membrane BioGide(®) as a scaffold for human osteoblast cell seeding for bone tissue engineering. MATERIAL AND METHODS Human osteoblasts were cultured with eluates from PRF (n = 7) and BioGide(®) (n = 8) membranes incubated in serum-free cell culture medium. Vitality of these cells was assessed by fluorescein diacetate and propidium iodide staining, biocompatibility with the lactate dehydrogenase test and proliferation levels with the MTT ([3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium-bromide]), and BrdU (5-bromo-2-deoxyuridine) tests. In addition, human osteoblasts were seeded on both membrane systems and cell growth was compared by the water soluble tetrazolium (WST-1) (4-[3-(4-iodophenyl)-2-(4-nitrophenyl)-2H-5-tetrazolio]-1,3-benzene disulfonate) test and scanning electron microscopy (SEM). Osteoblastic differentiation was assessed by alkaline phosphatase activity measured by ELISA in the supernatant of osteoblasts cultivated on PRF membranes (n = 10), PRF clots (n = 10), and BioGide(®) membranes (n = 10). RESULTS Lactate dehydrogenase test values were higher for PRF compared to BioGide(®) . The BrdU test showed superior cell growth after cultivation in eluate from PRF than in eluate from BioGide(®) . The WST-1 assay demonstrated superior cell proliferation on PRF than on BioGide(®) . SEM revealed osteoblast colonization of both membranes. Cultivation of osteoblasts on PRF membranes and PRF clots showed significantly higher alkaline phosphatase activity than on BioGide(®) membranes. CONCLUSION Metabolic activity and proliferation of human osteoblast cells in vitro were supported to a significant higher extent by eluates from PRF membranes. Both membranes are suitable as scaffolds for cultivation of human osteoblast cells in vitro; proliferation was significant higher on PRF membranes and on PRF clot than on BioGide(®) membranes.
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Affiliation(s)
- Volker Gassling
- Department of Oral and Maxillofacial Surgery, University of Schleswig-Holstein, 24105 Kiel, Germany.
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Zhu H, Wu B, Feng X, Chen J. Preparation and characterization of bioactive mesoporous calcium silicate-silk fibroin composite films. J Biomed Mater Res B Appl Biomater 2011; 98:330-41. [PMID: 21656665 DOI: 10.1002/jbm.b.31856] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2010] [Revised: 02/04/2011] [Accepted: 02/24/2011] [Indexed: 11/10/2022]
Abstract
Composite films of bioactive mesoporous calcium silicate (MCS)/silk fibroin (SF) and conventional calcium silicate (CS)/SF were fabricated by the solvent casting method, and the structures and properties of the composite films were characterized. Results of field emission scanning electron microscope (FESEM) indicated that MCS or CS was uniformly dispersed in the SF films. The measurements of the water contact angles suggested that the incorporation of either MCS or CS into SF could improve the hydrophilicity of the composite films, and the former was more effective than the later. The bioactivity of the composite films was evaluated by soaking in a simulated body fluid (SBF), and the formation of a hydroxycarbonate apatite (HCA) layer was determined by XRD and FT-IR. The results showed that the MCS/SF composite films have significantly enhanced apatite-forming bioactivity compared with the CS/SF composite films owing to the highly specific surface area and pore volume of MCS. In vitro cell attachment and proliferation tests showed that the MCS/SF composite film was a good matrix for the growth of MG63 cells. Consequently, the MCS/SF composite film possessed excellent physicochemical and biological properties, indicating its potential application for bone tissue engineering by designing 3D scaffolds according to its corresponding composition.
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Affiliation(s)
- Hailin Zhu
- The Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Xiasha Higher Education Zone, Zhejiang Sci-Tech University, Hangzhou, 310018, China
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Ghasemi-Mobarakeh L, Prabhakaran MP, Morshed M, Nasr-Esfahani MH, Baharvand H, Kiani S, Al-Deyab SS, Ramakrishna S. Application of conductive polymers, scaffolds and electrical stimulation for nerve tissue engineering. J Tissue Eng Regen Med 2011; 5:e17-35. [PMID: 21413155 DOI: 10.1002/term.383] [Citation(s) in RCA: 361] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Accepted: 10/12/2010] [Indexed: 12/17/2022]
Abstract
Among the numerous attempts to integrate tissue engineering concepts into strategies to repair nearly all parts of the body, neuronal repair stands out. This is partially due to the complexity of the nervous anatomical system, its functioning and the inefficiency of conventional repair approaches, which are based on single components of either biomaterials or cells alone. Electrical stimulation has been shown to enhance the nerve regeneration process and this consequently makes the use of electrically conductive polymers very attractive for the construction of scaffolds for nerve tissue engineering. In this review, by taking into consideration the electrical properties of nerve cells and the effect of electrical stimulation on nerve cells, we discuss the most commonly utilized conductive polymers, polypyrrole (PPy) and polyaniline (PANI), along with their design and modifications, thus making them suitable scaffolds for nerve tissue engineering. Other electrospun, composite, conductive scaffolds, such as PANI/gelatin and PPy/poly(ε-caprolactone), with or without electrical stimulation, are also discussed. Different procedures of electrical stimulation which have been used in tissue engineering, with examples on their specific applications in tissue engineering, are also discussed.
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Joddar B, Ito Y. Biological modifications of materials surfaces with proteins for regenerative medicine. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10984g] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Kaklamani G, Mehrban N, Chen J, Bowen J, Dong H, Grover L, Stamboulis A. Effect of plasma surface modification on the biocompatibility of UHMWPE. Biomed Mater 2010; 5:054102. [PMID: 20876959 DOI: 10.1088/1748-6041/5/5/054102] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this paper active screen plasma nitriding (ASPN) is used to chemically modify the surface of UHMWPE. This is an unexplored and new area of research. ASPN allows the homogeneous treatment of any shape or surface at low temperature; therefore, it was thought that ASPN would be an effective technique to modify organic polymer surfaces. ASPN experiments were carried out at 120 °C using a dc plasma nitriding unit with a 25% N(2) and 75% H(2) atmosphere at 2.5 mbar of pressure. UHMWPE samples treated for different time periods were characterized by nanoindentation, FTIR, XPS, interferometry and SEM. A 3T3 fibroblast cell line was used for in vitro cell culture experiments. Nanoindentation of UHMWPE showed that hardness and elastic modulus increased with ASPN treatment compared to the untreated material. FTIR spectra did not show significant differences between the untreated and treated samples; however, some changes were observed at 30 min of treatment in the range of 1500-1700 cm(-1) associated mainly with the presence of N-H groups. XPS studies showed that nitrogen was present on the surface and its amount increased with treatment time. Interferometry showed that no significant changes were observed on the surfaces after the treatment. Finally, cell culture experiments and SEM showed that fibroblasts attached and proliferated to a greater extent on the plasma-treated surfaces leading to the conclusion that ASPN surface treatment can potentially significantly improve the biocompatibility behaviour of polymeric materials.
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Affiliation(s)
- G Kaklamani
- School of Metallurgy and Materials, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B152TT, UK
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López-Pérez PM, da Silva RM, Sousa RA, Pashkuleva I, Reis RL. Plasma-induced polymerization as a tool for surface functionalization of polymer scaffolds for bone tissue engineering: an in vitro study. Acta Biomater 2010; 6:3704-12. [PMID: 20226283 DOI: 10.1016/j.actbio.2010.03.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 02/16/2010] [Accepted: 03/03/2010] [Indexed: 10/19/2022]
Abstract
A commonly applied strategy in the field of tissue engineering (TE) is the use of temporary three-dimensional scaffolds for supporting and guiding tissue formation in various in vitro strategies and in vivo regeneration approaches. The interactions of these scaffolds with highly sensitive bioentities such as living cells and tissues primarily occur through the material surface. Hence, surface chemistry and topological features have principal roles in coordinating biological events at the molecular, cellular and tissue levels on timescales ranging from seconds to weeks. However, tailoring the surface properties of scaffolds with a complex shape and architecture remains a challenge in materials science. Commonly applied wet chemical treatments often involve the use of toxic solvents whose oddments in the construct could be fatal in the subsequent application. Aiming to shorten the culture time in vitro (i.e. prior the implantation of the construct), in this work we propose a modification of previously described bone TE scaffolds made from a blend of starch with polycaprolactone (SPCL). The modification method involves surface grafting of sulfonic or phosphonic groups via plasma-induced polymerization of vinyl sulfonic and vinyl phosphonic acid, respectively. We demonstrate herein that the presence of these anionic functional groups can modulate cell adhesion mediated through the adsorbed proteins (from the culture medium). Under the conditions studied, both vitronectin adsorption and osteoblast proliferation and viability increased in the order SPCL << sulfonic-grafted SPCL < phosphonic-grafted SPCL. The results revealed that plasma-induced polymerization is an excellent alternative route, when compared to the commonly used wet chemical treatments, for the surface functionalization of biodevices with complex shape and porosity.
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Tarle S, Shi S, Kaigler D. Development of a serum-free system to expand dental-derived stem cells: PDLSCs and SHEDs. J Cell Physiol 2010; 226:66-73. [DOI: 10.1002/jcp.22304] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Dowling DP, Miller IS, Ardhaoui M, Gallagher WM. Effect of Surface Wettability and Topography on the Adhesion of Osteosarcoma Cells on Plasma-modified Polystyrene. J Biomater Appl 2010; 26:327-47. [DOI: 10.1177/0885328210372148] [Citation(s) in RCA: 264] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Biomaterials interact with the biological environment at their surface, making accurate biophysical characterization of the surface crucially important for understanding subsequent biological effects. In this study, the surface of polystyrene (PS) was systematically altered in order to determine the effect of plasma treatment and surface roughness on cell adhesion and spreading. Surfaces with water contact angle from hydrophilic (12°) to superhydrophobic (155°) were obtained through a combination of modifying surface roughness ( Ra), the deposition of siloxane coatings and the fluorination of the PS surface. Ra values in the range of 19—2365 nm were obtained by grinding the PS surface. The nanometer-thick siloxane coatings were deposited using an atmospheric pressure plasma system, while the fluorination of the PS was carried out using a low-pressure radio frequency (RF) plasma. The siloxane coatings were obtained using a liquid poly(dimethylsiloxane) precursor that was nebulized into helium or helium/oxygen plasmas. Water contact angles in the range of 12—122° were obtained with these coatings. Cell adhesion studies were carried out using human MG63 osteosarcoma cells. It was observed that higher polymer surface roughness enhanced cell adhesion, but had a negative effect on cell spreading. Optimum cell adhesion was observed at ∼64° for the siloxane coatings, with a decrease in adhesion observed for the more hydrophilic and hydrophobic coatings. This decrease in cell adhesion with an increase in hydrophobicity was also observed for the fluorinated PS surfaces with water contact angles in the range of 110—155°.
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Affiliation(s)
- Denis P. Dowling
- Surface Engineering Research Group, UCD School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Dublin 4, Ireland
| | - Ian S. Miller
- Conway Institute, School of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
| | - Malika Ardhaoui
- Surface Engineering Research Group, UCD School of Electrical, Electronic and Mechanical Engineering, University College Dublin, Dublin 4, Ireland,
| | - William M. Gallagher
- Conway Institute, School of Biomolecular and Biomedical Science, University College Dublin, Dublin 4, Ireland
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Chai F, Ochsenbein A, Traisnel M, Busch R, Breme J, Hildebrand HF. Improving endothelial cell adhesion and proliferation on titanium by sol-gel derived oxide coating. J Biomed Mater Res A 2010; 92:754-65. [PMID: 19274713 DOI: 10.1002/jbm.a.32399] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In-stent restenosis becomes increasingly prevalent as a difficult-to-treat disease. An alternative therapeutic strategy is enhancing endothelialization on metallic stent surfaces. This study attempted to modify surface chemistry and topography of commercial pure titanium (cp-Ti) by different sol-gel derived oxide coatings (TiO(2), SiO(2), SiO(2)/TiO(2), and Nb(2)O(5)) to improve endothelialization. The physiochemical properties of the modified surfaces were characterized by ellipsometry, atomic force microscope, and sessile-drop method. The cell adhesion/proliferation quantity, cell adhesion morphology, and focal adhesion protein expression were evaluated with human pulmonary microvascular endothelial cell line. The thickness of oxide coatings approximates to 100 nm; significantly rougher nanoporous structure was found in the TiO(2) and Nb(2)O(5) coatings than that of cp-Ti. SiO(2) coating possesses the highest surface energy (75.1 mJ/m(2)) and the lowest was for cp-Ti (45.7 mJ/m(2)). TiO(2) coating showed significantly higher endothelial cell adhesion rate than others; TiO(2), Nb(2)O(5), and TiO(2)/SiO(2) coatings exhibited higher endothelial proliferation in 3-day assays than noncoated Ti. In hemocompatible test, they also showed good hemocompatibility. These results offer the insight into that certain oxide coatings on titanium could significantly improve endothelial cell adhesion and proliferation especially in early period, which will favor reaching the endothelialization rapidly and suitable as matrix for "endothelial seeding" stent.
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Affiliation(s)
- Feng Chai
- Groupe de Recherche sur les Biomatériaux, Laboratoire de Biophysique UPRES EA 1049, Faculté de Médecine, Université de Lille-2 59045 Lille, France
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Scharnagl N, Lee S, Hiebl B, Sisson A, Lendlein A. Design principles for polymers as substratum for adherent cells. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00997k] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Kim EJ, Boehm CA, Mata A, Fleischman AJ, Muschler GF, Roy S. Post microtextures accelerate cell proliferation and osteogenesis. Acta Biomater 2010; 6:160-9. [PMID: 19539062 DOI: 10.1016/j.actbio.2009.06.016] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 05/08/2009] [Accepted: 06/10/2009] [Indexed: 10/20/2022]
Abstract
The influence of surface microtexture on osteogenesis was investigated in vitro by examining the proliferation and differentiation characteristics of a class of adult stem cells and their progeny, collectively known as connective tissue progenitor cells (CTPs). Human bone marrow-derived CTPs were cultured for up to 60 days on smooth polydimethylsiloxane (PDMS) surfaces and on PDMS with post microtextures that were 10 microm in diameter and 6 microm in height, with 10 microm separation. DNA quantification revealed that the numbers of CTPs initially attached to both substrates were similar. However, cells on microtextured PDMS transitioned from lag phase after 4 days of culture, in contrast to 6 days for cells on smooth surfaces. By day 9 cells on the smooth surfaces exhibited arbitrary flattened shapes and migrated without any preferred orientation. In contrast, cells on the microtextured PDMS grew along the array of posts in an orthogonal manner. By days 30 and 60 cells grew and covered all surfaces with extracellular matrix. Western blot analysis revealed that the expression of integrin alpha5 was greater on the microtextured PDMS compared with smooth surfaces. Real time reverse transcription-polymerase chain reaction revealed that gene expression of alkaline phosphatase had decreased by days 30 and 60, compared with that on day 9, for both substrates. Gene expression of collagen I and osteocalcin was consistently greater on post microtextures relative to smooth surfaces at all time points.
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38
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Faghihi S, Azari F, Szpunar JA, Vali H, Tabrizian M. Titanium crystal orientation as a tool for the improved and regulated cell attachment. J Biomed Mater Res A 2009; 91:656-62. [DOI: 10.1002/jbm.a.32275] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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39
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Misra R, Thein-Han W, Pesacreta T, Hasenstein K, Somani M, Karjalainen L. Cellular response of preosteoblasts to nanograined/ultrafine-grained structures. Acta Biomater 2009; 5:1455-67. [PMID: 19217838 DOI: 10.1016/j.actbio.2008.12.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2008] [Revised: 10/29/2008] [Accepted: 12/05/2008] [Indexed: 01/08/2023]
Abstract
Metallic materials with submicron- to nanometer-sized grains provide surfaces that are different from conventional polycrystalline materials because of the large proportion of grain boundaries with high free energy. In the study described here, the combination of cellular and molecular biology, materials science and engineering advances our understanding of cell-substrate interactions, especially the cellular activity between preosteoblasts and nanostructured metallic surfaces. Experiments on the effect of nano-/ultrafine grains have shown that cell attachment, proliferation, viability, morphology and spread are favorably modulated and significantly different from conventional coarse-grained structures. Additionally, immunofluorescence studies demonstrated stronger vinculin signals associated with actin stress fibers in the outer regions of the cells and cellular extensions on nanograined/ultrafine-grained substrate. These observations suggest enhanced cell-substrate interaction and activity. The differences in the cellular response on nanograined/ultrafine-grained and coarse-grained substrates are attributed to grain size and degree of hydrophilicity. The outcomes of the study are expected to reduce challenges to engineer bulk nanostructured materials with specific physical and surface properties for medical devices with improved cellular attachment and response. The data lay the foundation for a new branch of nanostructured materials for biomedical applications.
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40
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Sun M, Downes S. Physicochemical characterisation of novel ultra-thin biodegradable scaffolds for peripheral nerve repair. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:1181-1192. [PMID: 19132511 DOI: 10.1007/s10856-008-3671-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Accepted: 12/15/2008] [Indexed: 05/27/2023]
Abstract
In this study, the physicochemical properties of microporous poly (epsilon-caprolactone) (PCL) films and a composite material made of PCL and polylactic acid (PLA) blend were tested. Fabricated by solvent casting using dichloromethane, these ultra-thin films (60 +/- 5 microm in thickness) have a novel double-sided surface topography, i.e. a porous surface with pores 1-10 microm in diameter and a relatively smooth surface with nano-scaled texture. Porous surfaces were found to be associated with increased protein adsorption and the treatment of these polyester scaffolds with NaOH rendered them more hydrophilic. Differential Scanning Calorimetry (DSC) showed that the incorporation of PLA reduced the crystallinity of the original homopolymer. Chemical changes were investigated by means of Fourier Transform Infrared Spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Average surface roughness (Ra), hydrophilicity/hydrophobicity and mechanical properties of these materials were also assessed for the suitability of these materials as nerve conduits.
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Affiliation(s)
- Mingzhu Sun
- Department of Engineering and Physical Sciences, Materials Science Centre, The University of Manchester, Manchester, UK
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41
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You J, Heo JS, Lee J, Kim HS, Kim HO, Kim E. A Fluorescent Polymer for Patterning of Mesenchymal Stem Cells. Macromolecules 2009. [DOI: 10.1021/ma802722q] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jungmok You
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
| | - June Seok Heo
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
| | - Jiyea Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
| | - Han-Soo Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
| | - Hyun Ok Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
| | - Eunkyoung Kim
- Department of Chemical and Biomolecular Engineering, Yonsei University, Cell Therapy Center, Severance Hospital, College of Medicine, Yonsei University, and Department of Laboratory Medicine, College of Medicine, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
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42
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Liang YS, Zhao W, Chen GQ. Study on the biocompatibility of novel terpolyester poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-3-hydroxyhexanoate). J Biomed Mater Res A 2008; 87:441-9. [DOI: 10.1002/jbm.a.31801] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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43
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Ellis MJ, Chaudhuri JB. Human bone derived cell culture on PLGA flat sheet membranes of different lactide:glycolide ratio. Biotechnol Bioeng 2008; 101:369-77. [DOI: 10.1002/bit.21902] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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44
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Li H, Zhai W, Chang J. In vitro biocompatibility assessment of PHBV/Wollastonite composites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:67-73. [PMID: 17577632 DOI: 10.1007/s10856-007-3170-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2006] [Accepted: 09/11/2006] [Indexed: 05/15/2023]
Abstract
Biodegradable and biocompatible materials are the basis for tissue engineering. As an initial step for developing bone tissue engineering scaffolds, the in vitro biocompatibility of degradable and bioactive composites consisting of polyhydroxybutyrate-co-hydroxyvalerate (PHBV) and wollastonite (W) was studied by culturing osteoblasts on the PHBV/W substrates, and the cell adhesion, morphology, proliferation, and alkaline phosphatase (ALP) activity were evaluated. The results showed that the incorporation of wollastonite benefited osteoblasts adhesion and the osteoblasts cultured on the PHBV/W composite substrates spread better as compared to those on the pure PHBV after culturing for 3 h. In the prolonged incubation time, the osteoblasts cultured on the PHBV/W composite substrates revealed a higher proliferation and differentiation rate than those on the pure PHBV substrates. In addition, an increase of proliferation and differentiation rate was observed when the wollastonite content in the PHBV/W composites increased from 10 to 20 wt%. All of the results showed that the addition of wollastonite into PHBV could stimulate osteoblasts to proliferate and differentiate and the PHBV/W composites with wollastonite up to 20 wt% were more compatible than the pure PHBV materials for bone repair and bone tissue engineering.
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Affiliation(s)
- Haiyan Li
- Biomaterials and Tissue Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P.R. China
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45
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Faghihi S, Azari F, Zhilyaev AP, Szpunar JA, Vali H, Tabrizian M. Cellular and molecular interactions between MC3T3-E1 pre-osteoblasts and nanostructured titanium produced by high-pressure torsion. Biomaterials 2007; 28:3887-95. [PMID: 17568665 DOI: 10.1016/j.biomaterials.2007.05.010] [Citation(s) in RCA: 167] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Accepted: 05/17/2007] [Indexed: 11/25/2022]
Abstract
Ultra-fine surface features are commonly used to modulate cellular activity on a variety of materials. The continuing challenge for materials in contact with bone is the development of a material with both favorable surface and bulk properties to modulate not only the cell-substrate interactions, but also to ensure the long-term stability of the implant. In a combined approach involving material sciences and cell and molecular biology, the nature and mechanism of cell-substrate interaction, in particular, the molecular machinery controlling cell response to the surface of the nanostructured titanium based material produced by the high pressure torsion (HPT) process is assessed. The degree of pre-osteoblast attachment and rate of growth, which are regulated through the activity and interaction of proteins present in the extracellular matrix and associated with cytoskeleton and focal adhesion, are notably increased on the HPT-processed titanium substrates. The improved cell activity is attributed to the nanostructured feature of these substrates consisting of ultra-fine crystals (<50 nm) and a distinct surface oxide layer which provide higher degree of surface wettability. These findings demonstrate the advantages of HPT-processed titanium over the conventional and coated titanium implants, as both mechanical properties and cellular response are improved.
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Affiliation(s)
- Shahab Faghihi
- Department of Biomedical Engineering, McGill University, Montreal, QC, Canada H3A 2B4
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46
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Bottlang M, Sommers MB, Lusardi TA, Miesch JJ, Simon RP, Xiong ZG. Modeling neural injury in organotypic cultures by application of inertia-driven shear strain. J Neurotrauma 2007; 24:1068-77. [PMID: 17600521 DOI: 10.1089/neu.2006.3772] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In vitro models of traumatic brain injury (TBI) are indispensable to explore the effects of mechanotrauma on neurological injury cascades and injury thresholds. This study characterizes a novel in vitro model of neural shear injury, which for the first time subjects organotypic cultures to inertia-driven shear strain. In this model, organotypic cultures preserved a high level of biological heterogeneity and spatial cytoarchitecture, while inertia-driven shear strain represented a tissue-level insult typical for closed head TBI in vivo. For neural injury simulation, organotypic hippocampal cultures derived from rats were inserted in an inertial loading module, which was subjected to impacts at five graded impact velocities ranging from 2 to 10 m/sec. The mechanical insult was quantified by measuring the transient shear deformation of the culture surface during impact with a high-speed camera. The resultant cell death was quantified with propidium iodide (PI) staining 24 hours following shear injury. Increasing impact velocities of 2, 4.6, 6.6, 8.1, and 10.4 m/sec caused graded peak shear elongation of 2.0 +/- 0.9%, 5.4 +/- 3.8%, 15.1 +/- 14.6%, 25.4 +/- 14.7%, and 56.3 +/- 51.3%, respectively. Cell death in response to impact velocities of 6.6 m/sec or less was not significantly higher than baseline cell death in sham cultures (4.4 +/- 1.5%). Higher impact velocities of 8.1 and 10.4 m/sec resulted in a significant increase in cell death to 19.9 +/- 12.9% and 36.7 +/- 14.2%, respectively (p < 0.001). The neural shear injury model delivered a gradable, defined mechanotrauma and thereby provides a novel tool for investigation of biological injury cascades in organotypic cultures.
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Affiliation(s)
- Michael Bottlang
- Biomechanics Laboratory, Legacy Research Center, Portland, Oregon 97232, USA.
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47
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Michiardi A, Aparicio C, Ratner BD, Planell JA, Gil J. The influence of surface energy on competitive protein adsorption on oxidized NiTi surfaces. Biomaterials 2007; 28:586-94. [PMID: 17046057 DOI: 10.1016/j.biomaterials.2006.09.040] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2006] [Accepted: 09/27/2006] [Indexed: 11/21/2022]
Abstract
NiTi shape memory alloy surfaces, untreated, and oxidized by a new oxidation treatment (OT) in order to obtain a Ni-free surface, have been compared in terms of surface energy and protein adsorption behavior. The polar and dispersive components of the surface energy have been determined. A competitive adsorption process between fibronectin and albumin has been carried out by (125)I-radiolabeling. Moreover, the adhesion strength between both proteins and NiTi surfaces has been evaluated by performing an elution test. The results show that the OT treatment enhances the hydrophilic character of NiTi surfaces by significantly increasing the polar component of their surface energy. Moreover, the OT treatment increases the amount of fibronectin and albumin adsorbed. It also increases the fibronectin affinity for NiTi surfaces. The elution test results could suggest a conformational change of fibronectin as a function of chemical composition of NiTi material and of surface treatment. Finally, a linear correlation between the amount of adsorbed albumin and the polar component of the surface energy of NiTi surfaces has been demonstrated. This work indicates that the OT treatment has an influence on the surface energy value of NiTi materials, which in turn influences the protein adsorption process.
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Affiliation(s)
- Alexandra Michiardi
- Centre of Reference for Bioengineering of Catalonia (CREBEC), Biomaterials and Biomechanics Division, Department of Materials Science and Metallurgy, Technical University of Catalonia (UPC), Avda. Diagonal 647, Barcelona, 08028, Spain
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48
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Hanagata N, Takemura T, Monkawa A, Ikoma T, Tanaka J. Phenotype and gene expression pattern of osteoblast-like cells cultured on polystyrene and hydroxyapatite with pre-adsorbed type-I collagen. J Biomed Mater Res A 2007; 83:362-71. [PMID: 17450577 DOI: 10.1002/jbm.a.31240] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Hydroxyapatite and type-I collagen are major components of bone matrix. We compared phenotype and gene expression pattern of osteoblast-like cells cultured on HAp and HAp with pre-adsorbed type-I collagen from neutral solutions (HAp/NCs) with those of tissue culture grade polystyrene (TCPS) and TCPS with the collagen (TCPS/NCs). In initial cell attachment, the cells tensely spread on TCPS, while loosely spread on TCPS/NCs, HAp, and HAp/NCs. The levels of expressed integrin alpha2 and alpha5 subunits were not significantly different among any surfaces. Although the cells on HAp/NCs directly attached with the same collagen molecules as TCPS/NCs, mineralization was observed in only TCPS/NCs. The basal substrates (TCPS and HAp) greatly influenced osteoblast maturation even in the surfaces with pre-adsorbed collagen, since mineralization was induced by TCPS, but not by HAp. Gene expression pattern analyzed with DNA microarray also supported greater influence of basal substrates than pre-adsorbed collagen. In addition, comprehensive gene expression analyses revealed that HAp and HAp/NCs specifically up-regulated Ly6a and Tmem37 genes, while down-regulated Ifitm5 gene.
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Affiliation(s)
- Nobutaka Hanagata
- Biomaterials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
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Sawyer AA, Hennessy KM, Bellis SL. The effect of adsorbed serum proteins, RGD and proteoglycan-binding peptides on the adhesion of mesenchymal stem cells to hydroxyapatite. Biomaterials 2006; 28:383-92. [PMID: 16952395 DOI: 10.1016/j.biomaterials.2006.08.031] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2006] [Accepted: 08/16/2006] [Indexed: 10/24/2022]
Abstract
Prior studies from our laboratory have shown that RGD peptides increase the attachment of mesenchymal stem cells (MSCs) to hydroxyapatite (HA), however, RGD does not induce cell spreading when coupled to this type of biomaterial. In an effort to improve MSC spreading, and possibly cell attachment, proteoglycan-binding peptides (KRSR or FHRRIKA) were combined with RGD in the current study. It was found that the peptide combinations did not enhance MSC attachment relative to RGD alone, although a slight amount of spreading was elicited by both KRSR and FHRRIKA. Similar results were obtained with proteoglycan-binding peptides modified with a heptaglutamate domain, a motif that improves peptide tethering to HA. To determine whether differentiation status affected cell responses, MSCs were in vitro differentiated into osteoblasts, and evaluated as before. These experiments revealed that, like MSCs, osteoblasts did not adhere in greater numbers to the peptide combinations. Finally, none of the peptides or peptide combinations were able to stimulate the robust amount of cell adhesion and spreading elicited by serum-coated HA surfaces (of note, five different species of serum were tested). Given the propensity of HA to adsorb proadhesive proteins from blood/serum, we question the utility of functionalizing HA with RGD and/or proteoglycan-binding peptides.
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Affiliation(s)
- Amber A Sawyer
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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50
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Peelen D, Kodoyianni V, Lee J, Zheng T, Shortreed MR, Smith LM. Specific capture of mammalian cells by cell surface receptor binding to ligand immobilized on gold thin films. J Proteome Res 2006; 5:1580-5. [PMID: 16823965 PMCID: PMC2586825 DOI: 10.1021/pr050467e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aldehyde-terminated self-assembled monolayers (SAMs) on gold surfaces were modified with proteins and employed to capture intact living cells through specific ligand-cell surface receptor interactions. In our model system, the basic fibroblast growth factor (bFGF) binding receptor was targeted on baby hamster kidney (BHK-21) cells. Negative control and target proteins were immobilized on a gold surface by coupling protein primary amines to surface aldehyde groups. Cell-binding was monitored by phase contrast microscopy or surface plasmon resonance (SPR) imaging. The specificity of the receptor-ligand interaction was confirmed by the lack of cell binding to the negative control proteins, cytochrome c and insulin, and by the disruption of cell binding by treatment with heparitinase to destroy heparan sulfate which plays an essential role in the binding of bFGF to FGF receptors. This approach can simultaneously probe a large number of receptor-ligand interactions in cell populations and has potential for targeting and isolating cells from mixtures according to the receptors expressed on their surface.
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Affiliation(s)
- Dora Peelen
- Department of Chemistry, 1101 University Avenue, University of Wisconsin, Madison, Wisconsin 53706-1396, USA
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