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Fanovich MA, Di Maio E, Salerno A. Current Trend and New Opportunities for Multifunctional Bio-Scaffold Fabrication via High-Pressure Foaming. J Funct Biomater 2023; 14:480. [PMID: 37754894 PMCID: PMC10531842 DOI: 10.3390/jfb14090480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 09/03/2023] [Accepted: 09/11/2023] [Indexed: 09/28/2023] Open
Abstract
Biocompatible and biodegradable foams prepared using the high-pressure foaming technique have been widely investigated in recent decades as porous scaffolds for in vitro and in vivo tissue growth. In fact, the foaming process can operate at low temperatures to load bioactive molecules and cells within the pores of the scaffold, while the density and pore architecture, and, hence, properties of the scaffold, can be finely modulated by the proper selection of materials and processing conditions. Most importantly, the high-pressure foaming of polymers is an ideal choice to limit and/or avoid the use of cytotoxic and tissue-toxic compounds during scaffold preparation. The aim of this review is to provide the reader with the state of the art and current trend in the high-pressure foaming of biomedical polymers and composites towards the design and fabrication of multifunctional scaffolds for tissue engineering. This manuscript describes the application of the gas foaming process for bio-scaffold design and fabrication and highlights some of the most interesting results on: (1) the engineering of porous scaffolds featuring biomimetic porosity to guide cell behavior and to mimic the hierarchical architecture of complex tissues, such as bone; (2) the bioactivation of the scaffolds through the incorporation of inorganic fillers and drugs.
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Affiliation(s)
- María Alejandra Fanovich
- Institute of Materials Science and Technology (INTEMA), National University of Mar del Plata, National Research Council (CONICET), Mar del Plata 7600, Argentina;
| | - Ernesto Di Maio
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
| | - Aurelio Salerno
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, 80125 Naples, Italy;
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2
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Review on Bioinspired Design of ECM-Mimicking Scaffolds by Computer-Aided Assembly of Cell-Free and Cell Laden Micro-Modules. J Funct Biomater 2023; 14:jfb14020101. [PMID: 36826900 PMCID: PMC9964438 DOI: 10.3390/jfb14020101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/31/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
Tissue engineering needs bioactive drug delivery scaffolds capable of guiding cell biosynthesis and tissue morphogenesis in three dimensions. Several strategies have been developed to design and fabricate ECM-mimicking scaffolds suitable for directing in vitro cell/scaffold interaction, and controlling tissue morphogenesis in vivo. Among these strategies, emerging computer aided design and manufacturing processes, such as modular tissue unit patterning, promise to provide unprecedented control over the generation of biologically and biomechanically competent tissue analogues. This review discusses recent studies and highlights the role of scaffold microstructural properties and their drug release capability in cell fate control and tissue morphogenesis. Furthermore, the work highlights recent advances in the bottom-up fabrication of porous scaffolds and hybrid constructs through the computer-aided assembly of cell-free and/or cell-laden micro-modules. The advantages, current limitations, and future challenges of these strategies are described and discussed.
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Hadizadeh F, Khodaverdi E, Oroojalian F, Rahmanian-Devin P, Hassan M Hashemi S, Omidkhah N, Asare-Addo K, Nokhodchi A, Kamali H. Preparation of porous PCL-PEG-PCL scaffolds using supercritical carbon dioxide. Int J Pharm 2023; 631:122507. [PMID: 36535457 DOI: 10.1016/j.ijpharm.2022.122507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 12/12/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
In this study, the Supercritical Carbon Dioxide (scCO2) gas foaming procedure was used in the preparation of scaffolds containing the model drug dexamethasone (DXMT). The method used did not include an organic solvent thus making it a safe method. The ring-opening polymerization of PCL-PEG-PCL (PCEC) triblock was conducted using an organocatalyst [1,8 diazabicyclo [5.4.0] undec-7-ene (DBU)]. After mixing 5.0 g of DXMT with 50.0 g of PCEC, hydraulic pressure was applied to compress the mixed powder into disc-like tablets. The tablet-like scaffold of the triblock containing DXMT was inserted into a scCO2 gas-foaming device. The peak porosity percentage of the synthesized triblock was found to be 55.58 %. Pressure, temperature, soaking time and the time required to depressurize were recorded as 198 bar, 50 °C, 2.0 h, and 28 min respectively. After treatment with scCO2, the scaffolds experienced an almost full release of DXMT in vitro after 30 days (83.74 ± 1.54 % vs 52.24 ± 2.03 % before scCO2 treatment). In conclusion, the results proved that the scCO2 gas foaming procedure could be employed for constructing modifiable PCEC scaffolds with plausible porosity and structural and morphological features which can manipulate drug release.
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Affiliation(s)
- Farzin Hadizadeh
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran; Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Elham Khodaverdi
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Fatemeh Oroojalian
- Department of Advanced Sciences and Technologies in Medicine, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Pouria Rahmanian-Devin
- Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - S Hassan M Hashemi
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Negar Omidkhah
- Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Kofi Asare-Addo
- Department of Pharmacy, University of Huddersfield, Huddersfield, UK
| | - Ali Nokhodchi
- Pharmaceutics Research Laboratory, School of Life Sciences, University of Sussex, BN1 9QJ Brighton, UK; Lupin Research Inc., Lupin Pharmaceuticals, 4006 NW 124th Ave., Coral Spring, FL 33065, USA.
| | - Hossein Kamali
- Targeted Drug Delivery Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmaceutics, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
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Alkaissy R, Richard M, Morris H, Snelling S, Pinchbeck H, Carr A, Mouthuy PA. Manufacture of Soft-Hard Implants from Electrospun Filaments Embedded in 3D Printed Structures. Macromol Biosci 2022; 22:e2200156. [PMID: 36048528 DOI: 10.1002/mabi.202200156] [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: 04/27/2022] [Revised: 08/14/2022] [Indexed: 01/15/2023]
Abstract
Rotator cuff tendon tears are common injuries of the musculoskeletal system that often require surgical repair. However, re-tearing following repair is a significant clinical problem, with a failure rate of up to 40%, notably at the transition from bone to tendon. The development of biphasic materials consisting of soft and hard components, which can mimic this interface, is therefore promising. Here, a simple manufacturing approach is proposed that combines electrospun filaments and 3D printing to achieve scaffolds made of a soft polydioxanone cuff embedded in a porous polycaprolactone block. The insertion area of the cuff is based on the supraspinatus tendon footprint and the size of the cuff is scaled up from 9 to 270 electrospun filaments to reach a clinically relevant strength of 227N on average. The biological evaluation shows that the biphasic scaffold components are noncytotoxic, and that tendon and bone cells can be grown on the cuff and block, respectively. Overall, these results indicate that combining electrospinning and 3D printing is a feasible and promising approach to create soft-to-hard biphasic scaffolds that can improve the outcomes of rotator cuff repair.
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Affiliation(s)
- Rand Alkaissy
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Michael Richard
- 3D LifePrints UK Ltd, Nuffield Orthopaedic Centre, Old Road, Oxford, OX3 7LD, United Kingdom
| | - Hayley Morris
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Sarah Snelling
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Henry Pinchbeck
- 3D LifePrints UK Ltd, Nuffield Orthopaedic Centre, Old Road, Oxford, OX3 7LD, United Kingdom
| | - Andrew Carr
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Pierre-Alexis Mouthuy
- Botnar Institute of Musculoskeletal Sciences, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
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5
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Temple J, Velliou E, Shehata M, Lévy R, Gupta P. Current strategies with implementation of three-dimensional cell culture: the challenge of quantification. Interface Focus 2022; 12:20220019. [PMID: 35992772 PMCID: PMC9372643 DOI: 10.1098/rsfs.2022.0019] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 07/20/2022] [Indexed: 12/14/2022] Open
Abstract
From growing cells in spheroids to arranging them on complex engineered scaffolds, three-dimensional cell culture protocols are rapidly expanding and diversifying. While these systems may often improve the physiological relevance of cell culture models, they come with technical challenges, as many of the analytical methods used to characterize traditional two-dimensional (2D) cells must be modified or replaced to be effective. Here we review the advantages and limitations of quantification methods based either on biochemical measurements or microscopy imaging. We focus on the most basic of parameters that one may want to measure, the number of cells. Precise determination of this number is essential for many analytical techniques where measured quantities are only meaningful when normalized to the number of cells (e.g. cytochrome p450 enzyme activity). Thus, accurate measurement of cell number is often a prerequisite to allowing comparisons across different conditions (culturing conditions or drug and treatment screening) or between cells in different spatial states. We note that this issue is often neglected in the literature with little or no information given regarding how normalization was performed, we highlight the pitfalls and complications of quantification and call for more accurate reporting to improve reproducibility.
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Affiliation(s)
- Jonathan Temple
- Bioscience building, University of Liverpool, Liverpool L69 3BX, UK
| | - Eirini Velliou
- Centre for 3D Models of Health and Disease, University College London, London, UK
| | - Mona Shehata
- Hutchison-MRC Research Centre, University of Cambridge, Cambridge CB2 1TN, UK
| | - Raphaël Lévy
- Bioscience building, University of Liverpool, Liverpool L69 3BX, UK
- Laboratoire for Vascular Translational Science, Université Sorbonne Paris Nord, Bobigny, France
| | - Priyanka Gupta
- Centre for 3D Models of Health and Disease, University College London, London, UK
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Murchio S, Benedetti M, Berto A, Agostinacchio F, Zappini G, Maniglio D. Hybrid Ti6Al4V/Silk Fibroin Composite for Load-Bearing Implants: A Hierarchical Multifunctional Cellular Scaffold. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6156. [PMID: 36079541 PMCID: PMC9458142 DOI: 10.3390/ma15176156] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/30/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Despite the tremendous technological advances that metal additive manufacturing (AM) has made in the last decades, there are still some major concerns guaranteeing its massive industrial application in the biomedical field. Indeed, some main limitations arise in dealing with their biological properties, specifically in terms of osseointegration. Morphological accuracy of sub-unital elements along with the printing resolution are major constraints in the design workspace of a lattice, hindering the possibility of manufacturing structures optimized for proper osteointegration. To overcome these issues, the authors developed a new hybrid multifunctional composite scaffold consisting of an AM Ti6Al4V lattice structure and a silk fibroin/gelatin foam. The composite was realized by combining laser powder bed fusion (L-PBF) of simple cubic lattice structures with foaming techniques. A combined process of foaming and electrodeposition has been also evaluated. The multifunctional scaffolds were characterized to evaluate their pore size, morphology, and distribution as well as their adhesion and behavior at the metal-polymer interface. Pull-out tests in dry and hydrated conditions were employed for the mechanical characterization. Additionally, a cytotoxicity assessment was performed to preliminarily evaluate their potential application in the biomedical field as load-bearing next-generation medical devices.
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Affiliation(s)
- Simone Murchio
- Department of Industrial Engineering–DII, University of Trento, 38123 Trento, Italy
- BIOtech Research Center, University of Trento, 38122 Trento, Italy
| | - Matteo Benedetti
- BIOtech Research Center, University of Trento, 38122 Trento, Italy
| | - Anastasia Berto
- BIOtech Research Center, University of Trento, 38122 Trento, Italy
| | - Francesca Agostinacchio
- Department of Industrial Engineering–DII, University of Trento, 38123 Trento, Italy
- BIOtech Research Center, University of Trento, 38122 Trento, Italy
| | | | - Devid Maniglio
- Department of Industrial Engineering–DII, University of Trento, 38123 Trento, Italy
- BIOtech Research Center, University of Trento, 38122 Trento, Italy
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7
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Dexamethasone delivery of porous PEG-PCL-PEG scaffolds with supercritical carbon dioxide gas foaming. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102547] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pedram P, Mazio C, Imparato G, Netti PA, Salerno A. Bioinspired Design of Novel Microscaffolds for Fibroblast Guidance toward In Vitro Tissue Building. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9589-9603. [PMID: 33595284 DOI: 10.1021/acsami.0c20687] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Porous microscaffolds (μ-scaffs) play a crucial role in modular tissue engineering as they control cell functions and guide hierarchical tissue formation toward building new functional tissue analogues. In the present study, we developed a new route to prepare porous polycaprolactone (PCL) μ-scaffs with a bioinspired trabecular structure that supported in vitro adhesion, growth, and biosynthesis of human dermal fibroblasts (HDFs). The method involved the use of poly(ethylene oxide) (PEO) as a biocompatible porogen and a fluidic emulsion/porogen leaching/particle coagulation process to obtain spherical μ-scaffs with controllable diameter and full pore interconnectivity. To achieve this objective, we investigated the effect of PEO concentration and the temperature of the coagulation bath on the μ-scaff architecture, while we modulated the μ-scaff diameter distribution by varying the PCL-PEO amount in the starting solution and changing the flow rate of the continuous phase (QCP). μ-Scaff morphology, pore architecture, and diameter distribution were assessed using scanning electron microscopy (SEM) analysis, microcomputed tomography (microCT), and Image analysis. We reported that the selection of 60 wt % PEO concentration, together with a 4 °C coagulation bath temperature and ultrasound postprocessing, allowed for the design and fabrication of μ-scaff with porosity up to 80% and fully interconnected pores on both the μ-scaff surface and the core. Furthermore, μ-scaff diameter distributions were finely tuned in the 100-600 μm range with the coefficient of variation lower than 5% by selecting the PCL-PEO concentration in the 1-10% w/v range and QCP of either 8 or 18 mL/min. Finally, we investigated the capability of the HDF-seeded PCL μ-scaff to form hybrid (biological/synthetic) tissue in vitro. Cell culture tests demonstrated that PCL μ-scaff enabled HDF adhesion, proliferation, colonization, and collagen biosynthesis within inter- and intraparticle spaces and guided the formation of a large (centimeter-sized) viable tissue construct.
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Affiliation(s)
- Parisa Pedram
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT@CRIB), Largo Barsanti e Matteucci, 53, Naples 80125, Italy
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
| | - Claudia Mazio
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT@CRIB), Largo Barsanti e Matteucci, 53, Naples 80125, Italy
| | - Giorgia Imparato
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT@CRIB), Largo Barsanti e Matteucci, 53, Naples 80125, Italy
| | - Paolo A Netti
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT@CRIB), Largo Barsanti e Matteucci, 53, Naples 80125, Italy
- Department of Chemical, Materials and Industrial Production Engineering, University of Naples Federico II, Naples 80125, Italy
- Interdisciplinary Research Center on Biomaterials (CRIB), University of Naples Federico II, Naples 80125, Italy
| | - Aurelio Salerno
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia (IIT@CRIB), Largo Barsanti e Matteucci, 53, Naples 80125, Italy
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9
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Osteogenic differentiation of hBMSCs on porous photo-crosslinked poly(trimethylene carbonate) and nano-hydroxyapatite composites. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110335] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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10
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Abdur RM, Mousavi B, Shahadat HM, Akther N, Luo Z, Zhuiykov S, Verpoort F. Ring-opening copolymerization of ε-caprolactone and δ-valerolactone by a titanium-based metal–organic framework. NEW J CHEM 2021. [DOI: 10.1039/d1nj01946e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copolymerization of ε-caprolactone and δ-valerolactone without any co-catalyst in a solvent-free medium under eco-friendly conditions using earth abundant Ti-metal based MOF, MIL-125.
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Affiliation(s)
- Rahaman M. Abdur
- Laboratory of Organometallics
- Catalysis and Ordered Materials
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
| | - Bibimaryam Mousavi
- Laboratory of Organometallics
- Catalysis and Ordered Materials
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
| | - Hossain M. Shahadat
- Laboratory of Organometallics
- Catalysis and Ordered Materials
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
| | - Nishat Akther
- Department of Biochemistry and Molecular Biology
- Mawlana Bhashani Science and Technology University
- Tangail 1902
- Bangladesh
| | - Zhixiong Luo
- Laboratory of Organometallics
- Catalysis and Ordered Materials
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
| | - Serge Zhuiykov
- Center for Environmental and Energy Research (CEER)
- Ghent University Global Campus
- Yeonsu-Gu
- South Korea
| | - Francis Verpoort
- Laboratory of Organometallics
- Catalysis and Ordered Materials
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing
- Wuhan University of Technology
- Wuhan 430070
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Li A, Xu H, Yu P, Xing J, Ding C, Yan X, Xie J, Li J. Injectable hydrogels based on gellan gum promotes in situ mineralization and potential osteogenesis. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.110091] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Santos-Rosales V, Gallo M, Jaeger P, Alvarez-Lorenzo C, Gómez-Amoza JL, García-González CA. New insights in the morphological characterization and modelling of poly(ε-caprolactone) bone scaffolds obtained by supercritical CO2 foaming. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2020.105012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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13
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Titanium Scaffolds by Direct Ink Writing: Fabrication and Functionalization to Guide Osteoblast Behavior. METALS 2020. [DOI: 10.3390/met10091156] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Titanium (Ti) and Ti alloys have been used for decades for bone prostheses due to its mechanical reliability and good biocompatibility. However, the high stiffness of Ti implants and the lack of bioactivity are pending issues that should be improved to minimize implant failure. The stress shielding effect, a result of the stiffness mismatch between titanium and bone, can be reduced by introducing a tailored structural porosity in the implant. In this work, porous titanium structures were produced by direct ink writing (DIW), using a new Ti ink formulation containing a thermosensitive hydrogel. A thermal treatment was optimized to ensure the complete elimination of the binder before the sintering process, in order to avoid contamination of the titanium structures. The samples were sintered in argon atmosphere at 1200 °C, 1300 °C or 1400 °C, resulting in total porosities ranging between 72.3% and 77.7%. A correlation was found between the total porosity and the elastic modulus of the scaffolds. The stiffness and yield strength were similar to those of cancellous bone. The functionalization of the scaffold surface with a cell adhesion fibronectin recombinant fragment resulted in enhanced adhesion and spreading of osteoblastic-like cells, together with increased alkaline phosphatase expression and mineralization.
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14
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Kang Y, Datta P, Shanmughapriya S, Ozbolat IT. 3D Bioprinting of Tumor Models for Cancer Research. ACS APPLIED BIO MATERIALS 2020; 3:5552-5573. [DOI: 10.1021/acsabm.0c00791] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Youngnam Kang
- The Huck Institutes of the Life Sciences, Penn State University, University Park, Pennsylvania 16802, United States
- Engineering Science and Mechanics Department, Penn State University, University Park, Pennsylvania 16802, United States
| | - Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology Shibpur, Howrah, West Bengal 711103, India
| | - Santhanam Shanmughapriya
- Department of Medicine, Penn State University, College of Medicine, Hershey, Pennsylvania 17033, United States
- Department of Cellular and Molecular Physiology, Penn State University, College of Medicine, Hershey, Pennsylvania 17033, United States
- Heart and Vascular Institute, Penn State University, College of Medicine, Hershey, Pennsylvania 17033, United States
| | - Ibrahim T. Ozbolat
- The Huck Institutes of the Life Sciences, Penn State University, University Park, Pennsylvania 16802, United States
- Engineering Science and Mechanics Department, Penn State University, University Park, Pennsylvania 16802, United States
- Biomedical Engineering Department, Penn State University, University Park, Pennsylvania 16802, United States
- Materials Research Institute, Penn State University, University Park, Pennsylvania 16802, United States
- Department of Neurosurgery, Penn State University, Hershey, Pennsylvania 17033, United States
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15
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Tuning the three-dimensional architecture of supercritical CO2 foamed PCL scaffolds by a novel mould patterning approach. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110518. [DOI: 10.1016/j.msec.2019.110518] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 11/13/2019] [Accepted: 12/01/2019] [Indexed: 12/29/2022]
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16
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Hayashi K, Munar ML, Ishikawa K. Effects of macropore size in carbonate apatite honeycomb scaffolds on bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 111:110848. [PMID: 32279778 DOI: 10.1016/j.msec.2020.110848] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 02/13/2020] [Accepted: 03/12/2020] [Indexed: 01/23/2023]
Abstract
The pore architecture of scaffolds is a critical factor for angiogenesis and bone regeneration. Although the effects of scaffold macropore size have been investigated, most scaffolds feature macropores with poor uniformity and interconnectivity, and other parameters (e.g., microporosity, chemical composition, and strut thickness) differ among scaffolds. To clarify the threshold of effective macropore size, we fabricated honeycomb scaffolds (HCSs) with distinct macropore (i.e., channel) sizes (~100, ~200, and ~300 μm). The HCSs were composed of AB-type carbonate apatite with ~8.5% carbonate ions, i.e., the same composition as human bone mineral. Their honeycomb architecture displayed uniformly sized and orderly arranged channels with extremely high interconnectivity, and all the HCSs displayed ~100-μm-thick struts and 0.06 cm3 g-1 of micropore volume. The compressive strengths of HCSs with ~100-, ~200-, and ~300-μm channels were higher than those of reported scaffolds, and decreased with increasing channel size: 62 ± 6, 55 ± 9, and 43 ± 8 MPa, respectively. At four weeks after implantation in rabbit femur bone defects, new bone and blood vessels were formed in all the channels of these HCSs. Notably, the ~300-μm channels were extensively occupied by new bone. We demonstrated that high interconnectivity and uniformity of channels can decrease the threshold of effective macropore size, enabling the scaffolds to maintain high mechanical properties and osteogenic ability and serve as implants for weight-bearing areas.
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Affiliation(s)
- Koichiro Hayashi
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan.
| | - Melvin L Munar
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
| | - Kunio Ishikawa
- Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi Higashi-ku, Fukuoka 812-8582, Japan
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17
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Xing J, Huang X, Ding C, Chen Y, Xie J, Li J. From kPa to MPa: An Environmentally Friendly Way to Prepare a Polysaccharide Hydrogel with Tunable Mechanical Properties. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06769] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jiaqi Xing
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Xinyi Huang
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Chunmei Ding
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Yu Chen
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Jing Xie
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Jianshu Li
- Department of Biomedical Polymers and Artificial Organs, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, China
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18
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Seok JM, Rajangam T, Jeong JE, Cheong S, Joo SM, Oh SJ, Shin H, Kim SH, Park SA. Fabrication of 3D plotted scaffold with microporous strands for bone tissue engineering. J Mater Chem B 2020; 8:951-960. [DOI: 10.1039/c9tb02360g] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Scaffold porosity has played a key role in bone tissue engineering aimed at effective tissue regeneration, by promoting cell attachment, proliferation, and osteogenic differentiation for new bone formation.
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Affiliation(s)
- Ji Min Seok
- Department of Nature-Inspired Nanoconvergence Systems
- Korea Institute of Machinery and Materials
- Daejeon 34103
- Republic of Korea
- Department of Bioengineering
| | - Thanavel Rajangam
- Center for Biomaterials
- Biomedical Research Institute
- Korea Institute of Science and Technology
- Seoul
- Republic of Korea
| | - Jae Eun Jeong
- Department of Nature-Inspired Nanoconvergence Systems
- Korea Institute of Machinery and Materials
- Daejeon 34103
- Republic of Korea
| | | | - Sang Min Joo
- TaeWoong Medical Institute
- Osong 28161
- Republic of Korea
| | - Seung Ja Oh
- Center for Biomaterials
- Biomedical Research Institute
- Korea Institute of Science and Technology
- Seoul
- Republic of Korea
| | - Heungsoo Shin
- Department of Bioengineering
- Hanyang University
- Seoul 04763
- Republic of Korea
| | - Sang-Heon Kim
- Center for Biomaterials
- Biomedical Research Institute
- Korea Institute of Science and Technology
- Seoul
- Republic of Korea
| | - Su A Park
- Department of Nature-Inspired Nanoconvergence Systems
- Korea Institute of Machinery and Materials
- Daejeon 34103
- Republic of Korea
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19
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Sgarminato V, Tonda-Turo C, Ciardelli G. Reviewing recently developed technologies to direct cell activity through the control of pore size: From the macro- to the nanoscale. J Biomed Mater Res B Appl Biomater 2019; 108:1176-1185. [PMID: 31429201 DOI: 10.1002/jbm.b.34467] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 07/05/2019] [Accepted: 07/29/2019] [Indexed: 12/23/2022]
Abstract
Scaffold pore size plays a fundamental role in the regeneration of new tissue since it has been shown to direct cell activity in situ. It is well known that cellular response changes in relation with pores diameter. Consequently, researchers developed efficient approaches to realize scaffolds with controllable macro-, micro-, and nanoporous architecture. In this context, new strategies aiming at the manufacturing of scaffolds with multiscale pore networks have emerged, in the attempt to mimic the complex hierarchical structures found in living systems. In this review, we aim at providing an overview of the fabrication methods currently adopted to realize scaffolds with controlled, multisized pores highlighting their specific influence on cellular activity.
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Affiliation(s)
- Viola Sgarminato
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy
| | - Chiara Tonda-Turo
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy.,POLITO BIOMedLAB, Politecnico di Torino, Turin, Italy
| | - Gianluca Ciardelli
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, Italy.,POLITO BIOMedLAB, Politecnico di Torino, Turin, Italy.,Department for Materials and Devices of the National Research Council, Institute for the Chemical and Physical Processes (CNR-IPCF UOS), Pisa, Italy
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20
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Jubeli E, Khzam A, Yagoubi N. Cells integration onto scaffolds prepared from polyester based polymers – importance of polymer thermal properties in addition to hydrophilicity. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2018.1525549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Emile Jubeli
- Faculty of Pharmacy, Paris-Sud University, Paris, France
| | - Afif Khzam
- Faculty of Pharmacy, Paris-Sud University, Paris, France
| | - Najet Yagoubi
- Faculty of Pharmacy, Paris-Sud University, Paris, France
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21
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Abstract
Craniofacial bones, separate from the appendicular skeleton, bear a significant amount of strain and stress generated from mastication-related muscles. Current research on the regeneration of craniofacial bone focuses on the reestablishment of an elaborate vascular network. In this review, current challenges and efforts particularly in advances of scaffold properties and techniques for vascularization remodeling in craniofacial bone tissue engineering will be discussed. A microenvironment of ischemia and hypoxia in the biomaterial core drives propagation and reorganization of endothelial progenitor cells (EPCs) to assemble into a primitive microvascular framework. Co-culture strategies and delivery of vasculogenic molecules enhance EPCs' differentiation and stimulate the host regenerative response to promote vessel sprouting and strength. To optimize structural and vascular integration, well-designed microstructures of scaffolds are biologically considered. Proper porous structures, matrix stiffness, and surface morphology of scaffolds have a profound influence on cell behaviors and thus affect revascularization. In addition, advanced techniques facilitating angiogenesis and vaculogenesis have also been discussed. Oxygen delivery biomaterials, scaffold-free cell sheet techniques, and arteriovenous loop-induced axial vascularization strategies bring us new understanding and powerful strategies to manage revascularization of large craniofacial bone defects. Although promising histological results have been achieved, the efficient perfusion and functionalization of newly formed vessels are still challenging.
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Affiliation(s)
- T Tian
- 1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - T Zhang
- 1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Y Lin
- 1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - X Cai
- 1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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22
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Maji S, Agarwal T, Das J, Maiti TK. Development of gelatin/carboxymethyl chitosan/nano-hydroxyapatite composite 3D macroporous scaffold for bone tissue engineering applications. Carbohydr Polym 2018; 189:115-125. [PMID: 29580388 DOI: 10.1016/j.carbpol.2018.01.104] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 01/10/2018] [Accepted: 01/31/2018] [Indexed: 12/26/2022]
Abstract
The present study delineates a relatively simpler approach for fabrication of a macroporous three-dimensional scaffold for bone tissue engineering. The novelty of the work is to obtain a scaffold with macroporosity (interconnected networks) through a combined approach of high stirring induced foaming of the gelatin/carboxymethyl chitosan (CMC)/nano-hydroxyapatite (nHAp) matrix followed by freeze drying. The fabricated macroporous (SGC) scaffold had a greater pore size, higher porosity, higher water retention capacity, slow and sustained enzymatic degradation rate along with higher compressive strength compared to that of non-macroporous (NGC, prepared by conventional freeze drying methodology) scaffold. The biological studies revealed the increased percentage of viability, proliferation, and differentiation as well as higher mineralization of differentiated human Wharton's jelly MSC microtissue (wjhMSC-MT) on SGC as compared to NGC scaffold. RT-PCR also showed enhanced expression level of collagen type I, osteocalcin and Runx2 when seeded on SGC. μCT and histological analysis further revealed a penetration of cellular spheroid to a greater depth in SGC scaffold than NGC scaffold. Furthermore, the effect of cryopreservation on microtissue survival on the three-dimensional construct revealed significant higher viability upon revival in macroporous SGC scaffolds. These results together suggest that high stirring based macroporous scaffolds could have a potential application in bone tissue engineering.
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Affiliation(s)
- Somnath Maji
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, West Bengal, India.
| | - Tarun Agarwal
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, West Bengal, India.
| | - Joyjyoti Das
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, West Bengal, India.
| | - Tapas Kumar Maiti
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, West Bengal, India.
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23
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Babaie E, Bhaduri SB. Fabrication Aspects of Porous Biomaterials in Orthopedic Applications: A Review. ACS Biomater Sci Eng 2017; 4:1-39. [DOI: 10.1021/acsbiomaterials.7b00615] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elham Babaie
- Department
of Bioengineering, Bioscience Research Collaborative, Rice University, Houston, Texas 77030, United States
| | - Sarit B. Bhaduri
- Department
of Mechanical and Industrial Engineering and Division of Dentistry, University of Toledo, Toledo, Ohio 43606, United States
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24
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Abstract
Angiogenesis plays an important role not only in the growth and regeneration of tissues in humans but also in pathological conditions such as inflammation, degenerative disease and the formation of tumors. Angiogenesis is also vital in thick engineered tissues and constructs, such as those for the heart and bone, as these can face difficulties in successful implantation if they are insufficiently vascularized or unable to connect to the host vasculature. Considerable research has been carried out on angiogenic processes using a variety of approaches. Pathological angiogenesis has been analyzed at the cellular level through investigation of cell migration and interactions, modeling tissue level interactions between engineered blood vessels and whole organs, and elucidating signaling pathways involved in different angiogenic stimuli. Approaches to regenerative angiogenesis in ischemic tissues or wound repair focus on the vascularization of tissues, which can be broadly classified into two categories: scaffolds to direct and facilitate tissue growth and targeted delivery of genes, cells, growth factors or drugs that promote the regeneration. With technological advancement, models have been designed and fabricated to recapitulate the innate microenvironment. Moreover, engineered constructs provide not only a scaffold for tissue ingrowth but a reservoir of agents that can be controllably released for therapeutic purposes. This review summarizes the current approaches for modeling pathological and regenerative angiogenesis in the context of micro-/nanotechnology and seeks to bridge these two seemingly distant aspects of angiogenesis. The ultimate aim is to provide insights and advances from various models in the realm of angiogenesis studies that can be applied to clinical situations.
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Affiliation(s)
- Li-Jiun Chen
- Department of Finemechanics, Graduate School of Engineering, Tohoku University, 6-6-01 Aramaki, Aoba-ku, Sendai 980-8579, Japan.
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25
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Duval K, Grover H, Han LH, Mou Y, Pegoraro AF, Fredberg J, Chen Z. Modeling Physiological Events in 2D vs. 3D Cell Culture. Physiology (Bethesda) 2017; 32:266-277. [PMID: 28615311 PMCID: PMC5545611 DOI: 10.1152/physiol.00036.2016] [Citation(s) in RCA: 907] [Impact Index Per Article: 129.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 02/24/2017] [Accepted: 04/05/2017] [Indexed: 02/06/2023] Open
Abstract
Cell culture has become an indispensable tool to help uncover fundamental biophysical and biomolecular mechanisms by which cells assemble into tissues and organs, how these tissues function, and how that function becomes disrupted in disease. Cell culture is now widely used in biomedical research, tissue engineering, regenerative medicine, and industrial practices. Although flat, two-dimensional (2D) cell culture has predominated, recent research has shifted toward culture using three-dimensional (3D) structures, and more realistic biochemical and biomechanical microenvironments. Nevertheless, in 3D cell culture, many challenges remain, including the tissue-tissue interface, the mechanical microenvironment, and the spatiotemporal distributions of oxygen, nutrients, and metabolic wastes. Here, we review 2D and 3D cell culture methods, discuss advantages and limitations of these techniques in modeling physiologically and pathologically relevant processes, and suggest directions for future research.
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Affiliation(s)
- Kayla Duval
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
| | - Hannah Grover
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire
| | - Li-Hsin Han
- Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania
| | - Yongchao Mou
- Department of Bioengineering, University of Illinois-Chicago, Rockford, Illinois
| | - Adrian F Pegoraro
- Harvard School of Engineering and Applied Sciences, Cambridge, Massachusetts; and
| | - Jeffery Fredberg
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Zi Chen
- Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire;
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26
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Dong S, Wang L, Li Q, Chen X, Liu S, Zhou Y. Poly(L-lactide)-grafted bioglass/poly(lactide-co-glycolide) scaffolds with supercritical CO2 foaming reprocessing for bone tissue engineering. Chem Res Chin Univ 2017. [DOI: 10.1007/s40242-017-6341-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Fan C, Wang DA. Macroporous Hydrogel Scaffolds for Three-Dimensional Cell Culture and Tissue Engineering. TISSUE ENGINEERING PART B-REVIEWS 2017; 23:451-461. [PMID: 28067115 DOI: 10.1089/ten.teb.2016.0465] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hydrogels have been promising candidate scaffolds for cell delivery and tissue engineering due to their tissue-like physical properties and capability for homogeneous cell loading. However, the encapsulated cells are generally entrapped and constrained in the submicron- or nanosized gel networks, seriously limiting cell growth and tissue formation. Meanwhile, the spatially confined settlement inhibits attachment and spreading of anchorage-dependent cells, leading to their apoptosis. In recent years, macroporous hydrogels have attracted increasing attention in use as cell delivery vehicles and tissue engineering scaffolds. The introduction of macropores within gel scaffolds not only improves their permeability for better nutrient transport but also creates space/interface for cell adhesion, proliferation, and extracellular matrix deposition. Herein, we will first review the development of macroporous gel scaffolds and outline the impact of macropores on cell behaviors. In the first part, the advantages and challenges of hydrogels as three-dimensional (3D) cell culture scaffolds will be described. In the second part, the fabrication of various macroporous hydrogels will be presented. Third, the enhancement of cell activities within macroporous gel scaffolds will be discussed. Finally, several crucial factors that are envisaged to propel the improvement of macroporous gel scaffolds are proposed for 3D cell culture and tissue engineering.
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Affiliation(s)
- Changjiang Fan
- 1 Institute for Translational Medicine, College of Medicine, Qingdao University , Qingdao, People's Republic of China
| | - Dong-An Wang
- 2 School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore, Singapore
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28
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Effects of Different Fibre Alignments and Bioactive Coatings on Mesenchymal Stem/Stromal Cell Adhesion and Proliferation in Poly (ɛ-caprolactone) Scaffolds towards Cartilage Repair. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.promfg.2017.08.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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29
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Bobbert FSL, Zadpoor AA. Effects of bone substitute architecture and surface properties on cell response, angiogenesis, and structure of new bone. J Mater Chem B 2017; 5:6175-6192. [DOI: 10.1039/c7tb00741h] [Citation(s) in RCA: 150] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This paper presents an overview of the effect of porous biomaterial architecture on seeding efficiency, cell response, angiogenesis, and bone formation.
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Affiliation(s)
- F. S. L. Bobbert
- Department of Biomechanical Engineering
- Delft University of Technology
- Delft 2628CD
- The Netherlands
| | - A. A. Zadpoor
- Department of Biomechanical Engineering
- Delft University of Technology
- Delft 2628CD
- The Netherlands
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30
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Alaribe FN, Manoto SL, Motaung SCKM. Scaffolds from biomaterials: advantages and limitations in bone and tissue engineering. Biologia (Bratisl) 2016. [DOI: 10.1515/biolog-2016-0056] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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31
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Pore formation of poly(ε-caprolactone) scaffolds with melting point reduction in supercritical CO 2 foaming. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.07.006] [Citation(s) in RCA: 32] [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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32
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Jain KG, Mohanty S, Ray AR, Malhotra R, Airan B. Culture & differentiation of mesenchymal stem cell into osteoblast on degradable biomedical composite scaffold: In vitro study. Indian J Med Res 2016; 142:747-58. [PMID: 26831424 PMCID: PMC4774072 DOI: 10.4103/0971-5916.174568] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background & objectives: There is a significant bone tissue loss in patients from diseases and traumatic injury. The current autograft transplantation gold standard treatment has drawbacks, namely donor site morbidity and limited supply. The field of tissue engineering has emerged with a goal to provide alternative sources for transplantations to bridge this gap between the need and lack of bone graft. The aim of this study was to prepare biocomposite scaffolds based on chitosan (CHT), polycaprolactone (PCL) and hydroxyapatite (HAP) by freeze drying method and to assess the role of scaffolds in spatial organization, proliferation, and osteogenic differentiation of human mesenchymal stem cells (hMSCs) in vitro, in order to achieve bone graft substitutes with improved physical-chemical and biological properties. Methods: Pure chitosan (100CHT) and composites (40CHT/HAP, 30CHT/HAP/PCL and 25CHT/HAP/PCL scaffolds containing 40, 30, 25 parts per hundred resin (phr) filler, respectively) in acetic acid were freeze dried and the porous foams were studied for physicochemical and in vitro biological properties. Results: Scanning electron microscope (SEM) images of the scaffolds showed porous microstructure (20-300 μm) with uniform pore distribution in all compositions. Materials were tested under compressive load in wet condition (using phosphate buffered saline at pH 7.4). The in vitro studies showed that all the scaffold compositions supported mesenchymal stem cell attachment, proliferation and differentiation as visible from SEM images, [3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide] (MTT) assay, alkaline phosphatase (ALP) assay and quantitative reverse transcription (qRT)-PCR. Interpretation & conclusions: Scaffold composition 25CHT/HAP/PCL showed better biomechanical and osteoinductive properties as evident by mechanical test and alkaline phosphatase activity and osteoblast specific gene expression studies. This study suggests that this novel degradable 3D composite may have great potential to be used as scaffold in bone tissue engineering.
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Affiliation(s)
| | - Sujata Mohanty
- Stem Cell Facility, All India Institute of Medical Sciences, New Delhi, India
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33
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Perez RA, Mestres G. Role of pore size and morphology in musculo-skeletal tissue regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 61:922-39. [DOI: 10.1016/j.msec.2015.12.087] [Citation(s) in RCA: 218] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 12/23/2015] [Accepted: 12/28/2015] [Indexed: 01/04/2023]
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34
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Salerno A, Guarino V, Oliviero O, Ambrosio L, Domingo C. Bio-safe processing of polylactic-co-caprolactone and polylactic acid blends to fabricate fibrous porous scaffolds for in vitro mesenchymal stem cells adhesion and proliferation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 63:512-21. [PMID: 27040246 DOI: 10.1016/j.msec.2016.03.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 02/09/2016] [Accepted: 03/06/2016] [Indexed: 10/22/2022]
Abstract
In this study, the design and fabrication of porous scaffolds, made of blends of polylactic-co-caprolactone (PLC) and polylactic acid (PLA) polymers, for tissue engineering applications is reported. The scaffolds are prepared by means of a bio-safe thermally induced phase separation (TIPS) approach with or without the addition of NaCl particles used as particulate porogen. The scaffolds are characterized to assess their crystalline structure, morphology and mechanical properties, and the texture of the pores and the pore size distribution. Moreover, in vitro human mesenchymal stem cells (hMSCs) culture tests have been carried out to demonstrate the biocompatibility of the scaffolds. The results of this study demonstrate that all of the scaffold materials processed by means of TIPS process are semi-crystalline. Furthermore, the blend composition affected polymer crystallization and, in turn, the nano and macro-structural properties of the scaffolds. Indeed, neat PLC and neat PLA crystallize into globular and randomly arranged sub micro-size scale fibrous conformations, respectively. Concomitantly, the addition of NaCl particles during the fabrication route allows for the creation of an interconnected network of large pores inside the primary structure while resulted in a significant decrease of scaffolds mechanical response. Finally, the results of cell culture tests demonstrate that both the micro and macro-structure of the scaffold affect the in vitro hMSCs adhesion and proliferation.
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Affiliation(s)
- Aurelio Salerno
- Centre for Advanced Biomaterials for Health Care, Istituto Italiano di Tecnologia, Largo Barsanti e Matteucci 53, 80125 Napoli, Italy; Institute of Materials Science of Barcelona (ICMAB-CSIC), Campus de la UAB s/n, Bellaterra 08193, Spain.
| | - Vincenzo Guarino
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, V.le Kennedy 54, Pad 20, Mostra d'Oltremare, 80125 Naples, Italy
| | - Olimpia Oliviero
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, V.le Kennedy 54, Pad 20, Mostra d'Oltremare, 80125 Naples, Italy
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council of Italy, V.le Kennedy 54, Pad 20, Mostra d'Oltremare, 80125 Naples, Italy
| | - Concepción Domingo
- Institute of Materials Science of Barcelona (ICMAB-CSIC), Campus de la UAB s/n, Bellaterra 08193, Spain
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35
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Xu LQ, Huang HX. Formation mechanism and tuning for bi-modal cell structure in polystyrene foams by synergistic effect of temperature rising and depressurization with supercritical CO2. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.07.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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36
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Preparation of nano/macroporous polycaprolactone microspheres for an injectable cell delivery system using room temperature ionic liquid and camphene. J Colloid Interface Sci 2015; 465:18-25. [PMID: 26641560 DOI: 10.1016/j.jcis.2015.11.055] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/20/2015] [Accepted: 11/20/2015] [Indexed: 01/06/2023]
Abstract
The nano/macroporous polycaprolactone (PCL) microspheres with cell active surfaces were developed as an injectable cell delivery system. Room temperature ionic liquid (RTIL) and camphene were used as a liquid mold and a porogen, respectively. Various-sized spheres of 244-601μm with pores of various size and shape of 0.02-100μm, were formed depending on the camphene/RTIL ratio (0.8-2.6). To give cell activity, the surface of porous microspheres were further modified with nerve growth factors (NGF) containing gelatin to give a thin NGF/gelatin layer, to which the neural progenitor cells (PC-12) attached and extended their neurites on to the surface layers of the microspheres. The developed microspheres may be potentially applicable as a neuronal cell delivery scaffold for neuron tissue engineering.
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37
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Totaro A, Salerno A, Imparato G, Domingo C, Urciuolo F, Netti PA. PCL-HA microscaffolds for in vitro
modular bone tissue engineering. J Tissue Eng Regen Med 2015; 11:1865-1875. [DOI: 10.1002/term.2084] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/22/2015] [Accepted: 07/08/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Alessandra Totaro
- Centre for Advanced Biomaterials for Health Care, CRIB Istituto Italiano di Tecnologia; Naples Italy
- Department of Chemical, Materials and Industrial Production (DICMAPI) and Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II; Italy
| | - Aurelio Salerno
- Institut de Ciència de Materials de Barcelona (ICMAB); Bellaterra Spain
| | - Giorgia Imparato
- Centre for Advanced Biomaterials for Health Care, CRIB Istituto Italiano di Tecnologia; Naples Italy
| | | | - Francesco Urciuolo
- Centre for Advanced Biomaterials for Health Care, CRIB Istituto Italiano di Tecnologia; Naples Italy
| | - Paolo Antonio Netti
- Centre for Advanced Biomaterials for Health Care, CRIB Istituto Italiano di Tecnologia; Naples Italy
- Department of Chemical, Materials and Industrial Production (DICMAPI) and Interdisciplinary Research Centre on Biomaterials (CRIB); University of Naples Federico II; Italy
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38
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Fernández J, Etxeberria A, Sarasua JR. Crystallization and melting behavior of poly(ε-caprolactone-co-δ-valerolactone) and poly(ε-caprolactone-co-L-lactide) copolymers with novel chain microstructures. J Appl Polym Sci 2015. [DOI: 10.1002/app.42534] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Jorge Fernández
- Department of Mining-Metallurgy Engineering and Materials Science; POLYMAT, University of the Basque Country (UPV/EHU), School of Engineering; Alameda de Urquijo s/n. 48013 Bilbao Spain
| | - Agustin Etxeberria
- Department of Polymer Science and Technology; POLYMAT, University of the Basque Country (UPV/EHU); M. de Lardizabal 3 20018 Donostia-San Sebastian Spain
| | - Jose-Ramon Sarasua
- Department of Mining-Metallurgy Engineering and Materials Science; POLYMAT, University of the Basque Country (UPV/EHU), School of Engineering; Alameda de Urquijo s/n. 48013 Bilbao Spain
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39
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Mallepally RR, Marin MA, Surampudi V, Subia B, Rao RR, Kundu SC, McHugh MA. Silk fibroin aerogels: potential scaffolds for tissue engineering applications. ACTA ACUST UNITED AC 2015; 10:035002. [PMID: 25953953 DOI: 10.1088/1748-6041/10/3/035002] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Silk fibroin (SF) is a natural protein, which is derived from the Bombyx mori silkworm. SF based porous materials are extensively investigated for biomedical applications, due to their biocompatibility and biodegradability. In this work, CO2 assisted acidification is used to synthesize SF hydrogels that are subsequently converted to SF aerogels. The aqueous silk fibroin concentration is used to tune the morphology and textural properties of the SF aerogels. As the aqueous fibroin concentration increases from 2 to 6 wt%, the surface area of the resultant SF aerogels increases from 260 to 308 m(2) g(-1) and the compressive modulus of the SF aerogels increases from 19.5 to 174 kPa. To elucidate the effect of the freezing rate on the morphological and textural properties, SF cryogels are synthesized in this study. The surface area of the SF aerogels obtained from supercritical CO2 drying is approximately five times larger than the surface area of SF cryogels. SF aerogels exhibit distinct pore morphology compared to the SF cryogels. In vitro cell culture studies with human foreskin fibroblast cells demonstrate the cytocompatibility of the silk fibroin aerogel scaffolds and presence of cells within the aerogel scaffolds. The SF aerogels scaffolds created in this study with tailorable properties have potential for applications in tissue engineering.
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Affiliation(s)
- Rajendar R Mallepally
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
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40
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Pina S, Oliveira JM, Reis RL. Natural-based nanocomposites for bone tissue engineering and regenerative medicine: a review. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1143-1169. [PMID: 25580589 DOI: 10.1002/adma.201403354] [Citation(s) in RCA: 505] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/14/2014] [Indexed: 06/04/2023]
Abstract
Tissue engineering and regenerative medicine has been providing exciting technologies for the development of functional substitutes aimed to repair and regenerate damaged tissues and organs. Inspired by the hierarchical nature of bone, nanostructured biomaterials are gaining a singular attention for tissue engineering, owing their ability to promote cell adhesion and proliferation, and hence new bone growth, compared with conventional microsized materials. Of particular interest are nanocomposites involving biopolymeric matrices and bioactive nanosized fillers. Biodegradability, high mechanical strength, and osteointegration and formation of ligamentous tissue are properties required for such materials. Biopolymers are advantageous due to their similarities with extracellular matrices, specific degradation rates, and good biological performance. By its turn, calcium phosphates possess favorable osteoconductivity, resorbability, and biocompatibility. Herein, an overview on the available natural polymer/calcium phosphate nanocomposite materials, their design, and properties is presented. Scaffolds, hydrogels, and fibers as biomimetic strategies for tissue engineering, and processing methodologies are described. The specific biological properties of the nanocomposites, as well as their interaction with cells, including the use of bioactive molecules, are highlighted. Nanocomposites in vivo studies using animal models are also reviewed and discussed.
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Affiliation(s)
- Sandra Pina
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, 4806-909, Caldas das Taipas, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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41
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Salerno A, Fernández-Gutiérrez M, San Román del Barrio J, Domingo C. Bio-safe fabrication of PLA scaffolds for bone tissue engineering by combining phase separation, porogen leaching and scCO2 drying. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2014.10.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Bouet G, Marchat D, Cruel M, Malaval L, Vico L. In VitroThree-Dimensional Bone Tissue Models: From Cells to Controlled and Dynamic Environment. TISSUE ENGINEERING PART B-REVIEWS 2015; 21:133-56. [DOI: 10.1089/ten.teb.2013.0682] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Guenaelle Bouet
- Laboratoire de Biologie du Tissu Osseux, Institut National de la Santé et de la Recherche Médicale—U1059, Université de Lyon—Université Jean Monnet, Saint-Etienne, France
| | - David Marchat
- Center for Biomedical and Healthcare Engineering, Ecole Nationale Supérieure des Mines, CIS-EMSE, CNRS:UMR 5307, Saint-Etienne, France
| | - Magali Cruel
- University of Lyon, LTDS, UMR CNRS 5513, Ecole Centrale de Lyon, Ecully, France
| | - Luc Malaval
- Laboratoire de Biologie du Tissu Osseux, Institut National de la Santé et de la Recherche Médicale—U1059, Université de Lyon—Université Jean Monnet, Saint-Etienne, France
| | - Laurence Vico
- Laboratoire de Biologie du Tissu Osseux, Institut National de la Santé et de la Recherche Médicale—U1059, Université de Lyon—Université Jean Monnet, Saint-Etienne, France
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43
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Jing X, Mi HY, Cordie T, Salick M, Peng XF, Turng LS. Fabrication of Porous Poly(ε-caprolactone) Scaffolds Containing Chitosan Nanofibers by Combining Extrusion Foaming, Leaching, and Freeze-Drying Methods. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5034073] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xin Jing
- The
Key Laboratory of Polymer Processing Engineering of Ministry of Education,
National Engineering Research Center of Novel Equipment for Polymer
Processing, South China University of Technology, Guangzhou, China, 510641
| | - Hao-Yang Mi
- The
Key Laboratory of Polymer Processing Engineering of Ministry of Education,
National Engineering Research Center of Novel Equipment for Polymer
Processing, South China University of Technology, Guangzhou, China, 510641
| | | | | | - Xiang-Fang Peng
- The
Key Laboratory of Polymer Processing Engineering of Ministry of Education,
National Engineering Research Center of Novel Equipment for Polymer
Processing, South China University of Technology, Guangzhou, China, 510641
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Salerno A, Fanovich M, Pascual CD. The effect of ethyl-lactate and ethyl-acetate plasticizers on PCL and PCL–HA composites foamed with supercritical CO2. J Supercrit Fluids 2014. [DOI: 10.1016/j.supflu.2014.10.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Huri PY, Ozilgen BA, Hutton DL, Grayson WL. Scaffold pore size modulates in vitro osteogenesis of human adipose-derived stem/stromal cells. Biomed Mater 2014; 9:045003. [PMID: 24945873 DOI: 10.1088/1748-6041/9/4/045003] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Trabecular bone has an interconnected porous structure, which influences cellular responses, biochemical transport and mechanical strength. Appropriately mimicking this structural organization in biomaterial scaffolds can facilitate more robust bone tissue regeneration and integration by providing a native microenvironment to the cells. This study examined the effect of pore size on human adipose-derived stem/stromal cell (ASC) osteogenesis within poly(ε-caprolactone) (PCL) scaffolds. Scaffold pore size was controlled by porogen leaching of custom-made paraffin particles with three different size ranges: P200 (< 500 µm), P500 (500-1000 µm), and P1000 (1000-1500 µm). Scaffolds produced by leaching these particles exhibited highly interconnected pores and rough surface structures that were favorable for cell attachment and ingrowth. The osteogenic response of ASCs was evaluated following 3 weeks of in vitro culture using biochemical (ALP, Ca(2+)/DNA content), mechanical (compression test) and histological (H&E and von Kossa staining) analyses. It was observed that while the total number of cells was similar for all scaffolds, the cell distributions and osteogenic properties were affected by the scaffold pore size. ASCs were able to bridge smaller pores and grow uniformly within these scaffolds (P200) while they grew as a layer along the periphery of the largest pores (P1000). The cell-biomaterial interactions specific to the latter case led to enhanced osteogenic responses. The ALP activity and Ca(2+) deposition were doubled in P1000 scaffolds as compared to P200 scaffolds. A significant difference was observed between the compressive strength of unseeded and seeded P1000 scaffolds. Therefore, we demonstrated that the use of scaffolds with pores that are in the range of 1 mm enhances in vitro ASC osteogenesis, which may improve their performance in engineered bone substitutes.
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Affiliation(s)
- Pinar Yilgor Huri
- Department of Biomedical Engineering, Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
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A novel bio-safe phase separation process for preparing open-pore biodegradable polycaprolactone microparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:102-10. [PMID: 25063098 DOI: 10.1016/j.msec.2014.05.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/22/2014] [Accepted: 05/07/2014] [Indexed: 11/23/2022]
Abstract
Open-pore biodegradable microparticles are object of considerable interest for biomedical applications, particularly as cell and drug delivery carriers in tissue engineering and health care treatments. Furthermore, the engineering of microparticles with well definite size distribution and pore architecture by bio-safe fabrication routes is crucial to avoid the use of toxic compounds potentially harmful to cells and biological tissues. To achieve this important issue, in the present study a straightforward and bio-safe approach for fabricating porous biodegradable microparticles with controlled morphological and structural features down to the nanometer scale is developed. In particular, ethyl lactate is used as a non-toxic solvent for polycaprolactone particles fabrication via a thermal induced phase separation technique. The used approach allows achieving open-pore particles with mean particle size in the 150-250 μm range and a 3.5-7.9 m(2)/g specific surface area. Finally, the combination of thermal induced phase separation and porogen leaching techniques is employed for the first time to obtain multi-scaled porous microparticles with large external and internal pore sizes and potential improved characteristics for cell culture and tissue engineering. Samples were characterized to assess their thermal properties, morphology and crystalline structure features and textural properties.
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PARRILLI A, PAGANI S, MALTARELLO MC, SANTI S, SALERNO A, NETTI PA, GIARDINO R, RIMONDINI L, FINI M. Three-dimensional cellular distribution in polymeric scaffolds for bone regeneration: a microCT analysis compared to SEM, CLSM and DNA content. J Microsc 2014; 255:20-9. [DOI: 10.1111/jmi.12132] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 04/03/2014] [Indexed: 11/25/2022]
Affiliation(s)
- A. PARRILLI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - S. PAGANI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
- Laboratory of Preclinical and Surgical Studies; Rizzoli Orthopaedic Institute; Bologna Italy
| | - M. C. MALTARELLO
- Laboratory of Muscoskeletal Cell Biology; Rizzoli Orthopaedic Institute; Bologna Italy
- RAMSES Laboratory; Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - S. SANTI
- Laboratory of Muscoskeletal Cell Biology; Rizzoli Orthopaedic Institute; Bologna Italy
- CNR, Institute of Molecular Genetics; Bologna Italy
| | - A. SALERNO
- Interdisciplinary Research Centre of Biomaterials; University of Naples Federico II; Naples Italy
- Institute for Composite and Biomedical Materials; National Research Council; (IMCB-CNR); Naples Italy
| | - P. A. NETTI
- Interdisciplinary Research Centre of Biomaterials; University of Naples Federico II; Naples Italy
- Centre for Advanced Biomaterials for Health Care (CRIB-IIT); Istituto Italiano di Tecnologia; Naples Italy
| | - R. GIARDINO
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
| | - L. RIMONDINI
- Department of Health Sciences; University of Piemonte Orientale “Amedeo Avogadro”; Novara Italy
| | - M. FINI
- Biocompatibility, Technological Innovations and Advanced Therapies Laboratory (BITTA); Rizzoli RIT Department; Rizzoli Orthopaedic Institute; Bologna Italy
- Laboratory of Preclinical and Surgical Studies; Rizzoli Orthopaedic Institute; Bologna Italy
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Hammer J, Han LH, Tong X, Yang F. A Facile Method to Fabricate Hydrogels with Microchannel-Like Porosity for Tissue Engineering. Tissue Eng Part C Methods 2014; 20:169-76. [DOI: 10.1089/ten.tec.2013.0176] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Joshua Hammer
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona
| | - Li-Hsin Han
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Xinming Tong
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
| | - Fan Yang
- Department of Orthopaedic Surgery, Stanford University, Stanford, California
- Department of Bioengineering, Stanford University, Stanford, California
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Blends of thermoplastic polyurethane and polydimethylsiloxane rubber: assessment of biocompatibility and suture holding strength of membranes. Int J Biomater 2013; 2013:240631. [PMID: 24454376 PMCID: PMC3878810 DOI: 10.1155/2013/240631] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Accepted: 11/12/2013] [Indexed: 11/30/2022] Open
Abstract
In the present investigation, a compatibilized blend of thermoplastic polyurethane (TPU) and polydimethylsiloxane (PDMS) is prepared by using copolymer of ethylene and methyl acrylate (EMA) as a reactive compatibilizer. Detailed in vitro biocompatibility studies were carried out for this compatibilized blend and the material was found noncytotoxic towards L929 mouse fibroblast subcutaneous connective tissue cell line. Microporosity was created on the surface of membranes prepared from the blend material by adopting the crazing mechanism. Cell proliferation and growth studies on the membranes surface showed that the microporous surface favoured ingrowth of the cells compared with a nonmicroporous surface. Suture holding strength studies indicate that the microporous membranes have enough strength to withstand the cutting and tearing forces through the suture hole. This blend material could be evaluated further to find its suitability in various implant applications.
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50
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Rossi F, Santoro M, Perale G. Polymeric scaffolds as stem cell carriers in bone repair. J Tissue Eng Regen Med 2013; 9:1093-119. [DOI: 10.1002/term.1827] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Revised: 07/29/2013] [Accepted: 08/30/2013] [Indexed: 12/16/2022]
Affiliation(s)
- Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering; 'Giulio Natta' Politecnico di Milano; Milan Italy
| | - Marco Santoro
- Department of Chemical and Biomolecular Engineering; Rice University; Houston TX USA
| | - Giuseppe Perale
- Department of Chemistry, Materials and Chemical Engineering; 'Giulio Natta' Politecnico di Milano; Milan Italy
- Department of Innovative Technologies; University of Southern Switzerland; Manno Switzerland
- Swiss Institute for Regenerative Medicine; Taverne Switzerland
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