1
|
Combined Effects of Electrical Stimulation and Protein Coatings on Myotube Formation in a Soft Porous Scaffold. Ann Biomed Eng 2019; 48:734-746. [DOI: 10.1007/s10439-019-02397-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 10/30/2019] [Indexed: 12/31/2022]
|
2
|
3D porous polyurethanes featured by different mechanical properties: Characterization and interaction with skeletal muscle cells. J Mech Behav Biomed Mater 2017; 75:147-159. [PMID: 28734256 DOI: 10.1016/j.jmbbm.2017.07.018] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 07/10/2017] [Accepted: 07/13/2017] [Indexed: 02/07/2023]
Abstract
The fabrication of biomaterials for interaction with muscle cells has attracted significant interest in the last decades. However, 3D porous scaffolds featured by a relatively low stiffness (almost matching the natural muscle one) and highly stable in response to cyclic loadings are not available at present, in this context. This work describes 3D polyurethane-based porous scaffolds featured by different mechanical properties. Biomaterial stiffness was finely tuned by varying the cross-linking degree of the starting foam. Compression tests revealed, for the softest material formulation, stiffness values close to the ones possessed by natural skeletal muscles. The materials were also characterized in terms of local nanoindenting, rheometric properties and long-term stability through cyclic compressions, in a strain range reflecting the contraction extent of natural muscles. Preliminary in vitro tests revealed a preferential adhesion of C2C12 skeletal muscle cells over the softer, rougher and more porous structures. All the material formulations showed low cytotoxicity.
Collapse
|
3
|
Hafezi M, Safarian S, Khorasani MT, Abu Osman NA. Polyurethane/58S bioglass nanofibers: synthesis, characterization, and in vitro evaluation. RSC Adv 2016. [DOI: 10.1039/c5ra24786a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, polyurethane nanofibers containing 5 and 10 wt% synthesized 58S bioglass were designed and fabricated by the electrospinning process.
Collapse
Affiliation(s)
- Masoud Hafezi
- Department of Biomedical Engineering
- Faculty of Engineering
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Shokofeh Safarian
- Department of Biomaterials
- Tehran Science and Research Branch
- Islamic Azad University
- Tehran
- Iran
| | | | - Noor Azuan Abu Osman
- Department of Biomedical Engineering
- Faculty of Engineering
- University of Malaya
- Kuala Lumpur
- Malaysia
| |
Collapse
|
4
|
Ionic cross‐linking of water‐soluble polyurethane improves protein encapsulation and release. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400188] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
5
|
Sartori S, Boffito M, Serafini P, Caporale A, Silvestri A, Bernardi E, Sassi MP, Boccafoschi F, Ciardelli G. Synthesis and structure–property relationship of polyester-urethanes and their evaluation for the regeneration of contractile tissues. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.01.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
6
|
Herrmann FEM, Lehner A, Hollweck T, Haas U, Fano C, Fehrenbach D, Kozlik-Feldmann R, Wintermantel E, Eissner G, Hagl C, Akra B. In vitro biological and mechanical evaluation of various scaffold materials for myocardial tissue engineering. J Biomed Mater Res A 2013; 102:958-66. [PMID: 23650018 DOI: 10.1002/jbm.a.34786] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Accepted: 04/30/2013] [Indexed: 11/06/2022]
Abstract
A cardiac patch is a construct devised in regenerative medicine to replace necrotic heart tissue after myocardial infarctions. The cardiac patch consists of a scaffold seeded with stem cells. To identify the best scaffold for cardiac patch construction we compared polyurethane, Collagen Cell Carriers, ePTFE, and ePTFE SSP1-RGD regarding their receptiveness to seeding with mesenchymal stem cells isolated from umbilical cord tissue. Seeding was tested at an array of cell seeding densities. The bioartificial patches were cultured for up to 35 days and evaluated by scanning electron microscopy, microscopy of histological stains, fluorescence microscopy, and mitochondrial assays. Polyurethane was the only biomaterial which resulted in an organized multilayer (seeding density: 0.750 × 10(6) cells/cm(2)). Cultured over 35 days at this seeding density the mitochondrial activity of the cells on polyurethane patches continually increased. There was no decrease in the E Modulus of polyurethane once seeded with cells. Seeding of CCC could only be realized at a low seeding density and both ePTFE and ePTFE SSP1-RGD were found to be unreceptive to seeding. Of the tested scaffolds polyurethane thus crystallized as the most appropriate for seeding with mesenchymal stem cells in the framework of myocardial tissue engineering.
Collapse
Affiliation(s)
- Florian E M Herrmann
- Department of Cardiac Surgery, Laboratory for Tissue Engineering, Grosshadern Medical Centre, Ludwig Maximilian University, Marchioninistr. 15, 81377, Munich, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Sartori S, Caporale A, Rechichi A, Cufari D, Cristallini C, Barbani N, Giusti P, Ciardelli G. Biodegradable paclitaxel-loaded microparticles prepared from novel block copolymers: influence of polymer composition on drug encapsulation and release. J Pept Sci 2013; 19:205-13. [PMID: 23495215 DOI: 10.1002/psc.2491] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 01/09/2013] [Accepted: 01/15/2013] [Indexed: 11/06/2022]
Abstract
This study covers the preparation of microspheres for the controlled and targeted release of paclitaxel, using novel degradable polymers as carrier materials. Paclitaxel-loaded microspheres were prepared by oil-in-water single-emulsion solvent extraction/evaporation technique by using a series of polyurethanes and a block copolymer; the physicochemical properties of these polymers were modulated by changing nature and composition of their structural units. The obtained microparticles showed a regular morphology and properties (diameter: 1-100 µm; resuspension index: 18.8-100%; encapsulation efficiency: 26.6-97.2%) depending on polymer hydrophilicity and emulsifier used. In vitro release curves showed in all cases almost zero-order kinetics after an initial low burst effect (from 1 to 8.4%), which is required to minimize the drug side effects. This work also proposes a novel strategy to combine a controlled and a targeted release through the functionalization of the polymer matrix with peptide sequences. An RGD-functionalized polyurethane was used to successfully prepare paclitaxel-loaded microparticles. Studies on the preparation of polymer microspheres are reported.
Collapse
Affiliation(s)
- Susanna Sartori
- Department of Mechanical and AerospaceEngineering, Politecnico di Torino, Torino, Italy
| | | | | | | | | | | | | | | |
Collapse
|
8
|
Prakash S, Pinti M, Bhushan B. Theory, fabrication and applications of microfluidic and nanofluidic biosensors. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2012; 370:2269-2303. [PMID: 22509059 DOI: 10.1098/rsta.2011.0498] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Biosensors are a broad array of devices that detect the type and amount of a biological species or biomolecule. Several different types of biosensors have been developed that rely on changes to mechanical, chemical or electrical properties of the transduction or sensing element to induce a measurable signal. Often, a biosensor will integrate several functions or unit operations such as sample extraction, manipulation and detection on a single platform. This review begins with an overview of the current state-of-the-art biosensor field. Next, the review delves into a special class of biosensors that rely on microfluidics and nanofluidics by presenting the underlying theory, fabrication and several examples and applications of microfluidic and nanofluidic sensors.
Collapse
Affiliation(s)
- Shaurya Prakash
- Department of Mechanical and Aerospace Engineering, The Ohio State University, Columbus, 43210, USA.
| | | | | |
Collapse
|
9
|
Meng Q, Hu J, Liu B, Zhu Y. A Low-Temperature Thermoplastic Anti-bacterial Medical Orthotic Material Made of Shape Memory Polyurethane Ionomer: Influence of Ionic Group. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:199-218. [DOI: 10.1163/156856209x404497] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Qinghao Meng
- a Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| | - Jinlian Hu
- b Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| | - Baohua Liu
- c Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| | - Yong Zhu
- d Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| |
Collapse
|
10
|
Meng Q, Hu J, Zhu Y. Properties of shape memory polyurethane used as a low-temperature thermoplastic biomedical orthotic material: influence of hard segment content. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 19:1437-54. [DOI: 10.1163/156856208786140355] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Qinghao Meng
- a Institute of Textiles and Clothing, Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| | - Jinlian Hu
- b Institute of Textiles and Clothing, Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| | - Yong Zhu
- c Institute of Textiles and Clothing, Hong Kong Polytechnic University, Kowloon, Hong Kong, P. R. China
| |
Collapse
|
11
|
Poster Presentations. Regen Med 2011. [DOI: 10.2217/rme.12.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
12
|
Silvestri A, Serafini PM, Sartori S, Ferrando P, Boccafoschi F, Milione S, Conzatti L, Ciardelli G. Polyurethane-based biomaterials for shape-adjustable cardiovascular devices. J Appl Polym Sci 2011. [DOI: 10.1002/app.34779] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
13
|
Chiono V, Sartori S, Rechichi A, Tonda-Turo C, Vozzi G, Vozzi F, D'Acunto M, Salvadori C, Dini F, Barsotti G, Carlucci F, Burchielli S, Nicolino S, Audisio C, Perroteau I, Giusti P, Ciardelli G. Poly(ester urethane) Guides for Peripheral Nerve Regeneration. Macromol Biosci 2010; 11:245-56. [DOI: 10.1002/mabi.201000354] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Indexed: 01/31/2023]
|
14
|
Moiyadi AV, Shetty PM. Indigenous customized sponge shunt for a recurrent brainstem cyst. World Neurosurg 2010; 73:417-9. [PMID: 20849804 DOI: 10.1016/j.wneu.2010.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Accepted: 01/14/2010] [Indexed: 11/17/2022]
Abstract
BACKGROUND Various treatment modalities are available for treatment of cystic lesions of the brainstem. However, cyst refilling and recurrences are very common. This article describes a young boy who presented with an intra-axial brainstem cyst following radiation for a pilocytic astrocytoma. METHODS The cyst was decompressed surgically once but it soon refilled. The use of a novel customized synthetic sponge acting as a shunt for the treatment of a cystic brainstem lesion is discussed. The sponge was fashioned like a dumbbell and inserted across the fenestration in the cyst wall. RESULTS The dumbbell design made it self-retaining. The characteristics of the sponge permitted continuous capillary drainage, with a low risk of occlusion. There was a dramatic decrease in the cyst size on follow-up scans, with resolution of clinical deficits. CONCLUSIONS A customized sponge shunt can serve as an easily available and effective internal shunt for intra-axial craniospinal cysts.
Collapse
Affiliation(s)
- Aliasgar V Moiyadi
- Department of Surgical Oncology, Neurosurgical Services, Tata Memorial Hospital, Mumbai, India.
| | | |
Collapse
|
15
|
Baino F, Verné E, Vitale-Brovarone C. Feasibility, tailoring and properties of polyurethane/bioactive glass composite scaffolds for tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:2189-2195. [PMID: 19488679 DOI: 10.1007/s10856-009-3787-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2009] [Accepted: 05/19/2009] [Indexed: 05/27/2023]
Abstract
This research work aims to propose highly porous polymer/bioactive glass composites as potential scaffolds for hard-tissue and soft-tissue engineering. The scaffolds were prepared by impregnating an open-cells polyurethane sponge with melt-derived particles of a bioactive glass belonging to the SiO(2)-P(2)O(5)-CaO-MgO-Na(2)O-K(2)O system (CEL2). Both the starting materials and the composite scaffolds were investigated from a morphological and structural viewpoint by X-ray diffraction analysis and scanning electron microscopy. Tensile mechanical tests, carried out according to international ISO and ASTM standards, were performed by using properly tailored specimens. In vitro tests by soaking the scaffolds in simulated body fluid (SBF) were also carried out to assess the bioactivity of the porous composites. It was found that the composite scaffolds were highly bioactive as after 7 days of soaking in SBF a HA layer grew on their surface. The obtained polyurethane/CEL2 composite scaffolds are promising candidates for tissue engineering applications.
Collapse
Affiliation(s)
- Francesco Baino
- Materials Science and Chemical Engineering Department, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy.
| | | | | |
Collapse
|
16
|
Meng Q, Hu J, Yeung LY, Hu Y. The influence of heat treatment on the properties of shape memory fibers. II. Tensile properties, dimensional stability, recovery force relaxation, and thermomechanical cyclic properties. J Appl Polym Sci 2009. [DOI: 10.1002/app.29165] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
17
|
Wei Xu, Xiaohong Wang, Yongnian Yan, Renji Zhang. A Polyurethane-Gelatin Hybrid Construct for Manufacturing Implantable Bioartificial Livers. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911508095517] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A novel 3D hybrid construct was developed for liver manufacturing by depositing biodegradable polyurethane (PU) and a naturally derived polymer gelatin simultaneously via a double nozzle rapid prototyping (RP) technique. A grid object was produced by precisely and simultaneously dispersing the PU and gelatin to form 3D constructs with interconnected macro-channels at a low temperature (-28°C). Micro-pores were formed by freeze-drying the constructs. The PU polymer provided mechanical support while gelatin provided accommodation for implant cells. The hydrophilicity of the hybrid constructs was between the pure PU and pure gelatin structures. The interconnected channels allow nutrients and oxygen to be supplied throughout the construct as well as provide space for the attachment of cells. The design and fabrication strategies, used to create complex physical objects directly from computer aided design (CAD) models, represent a promising technique for implantable bioartificial livers. It is anticipated that these PU-gelatin hybrid constructs will serve as a useful model for bioartificial liver manufacturing.
Collapse
Affiliation(s)
- Wei Xu
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing Department of Mechanical Engineering, Tsinghua University Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Xiaohong Wang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing Department of Mechanical Engineering, Tsinghua University Beijing 100084, P.R. China, , Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing Department of Mechanical Engineering, Tsinghua University Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing Department of Mechanical Engineering, Tsinghua University Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| |
Collapse
|
18
|
Chiono V, Ciardelli G, Vozzi G, Cortez J, Barbani N, Gentile P, Giusti P. Enzymatically‐Modified Melt‐Extruded Guides for Peripheral Nerve Repair. Eng Life Sci 2008. [DOI: 10.1002/elsc.200700069] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
|
19
|
Wei Xu, Xiao Wang, Yongnian Yan, Renji Zhang. Rapid Prototyping of Polyurethane for the Creation of Vascular Systems. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911507088271] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A precise control over the internal architecture was essential for manufacture of complex organs. To create vascular systems that mimic human livers, we designed and fabricated complex 3D objects with an intrinsic network of interconnected channels. A new elastomeric polyurethane, mainly based on polycaprolactone and poly(ethylene glycol) with excellent biocompatibility and tunable biodegradation properties, was used to fabricate these vascular systems using a low temperature deposition system based on the layer-by-layer manufacturing principle. A specific model was selected via computer aided design (CAD), solid free form fabrication processes are conducted under computer direction. Two example object patterns were produced by precision controlled dispensing of a biodegradable polyurethane into 3D multi-micro-tunnels with multi-micro-pores at a low temperature (-28°C). The design and fabrication strategies used to create physical objects directly from CAD models represent a promising route for the establishment of complex organ vascular systems.
Collapse
Affiliation(s)
- Wei Xu
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Xiao Wang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, , Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Yongnian Yan
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| | - Renji Zhang
- Key Laboratory for Advanced Materials Processing Technology Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P.R. China, Institute of Life Science & Medicine, Tsinghua University Beijing 100084, P.R. China
| |
Collapse
|
20
|
Meng Q, Hu J. Influence of heat treatment on the properties of shape memory fibers. I. Crystallinity, hydrogen bonding, and shape memory effect. J Appl Polym Sci 2008. [DOI: 10.1002/app.28363] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
21
|
Meng Q, Hu J. Study on poly(ɛ-caprolactone)-based shape memory copolymer fiber prepared by bulk polymerization and melt spinning. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.985] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|