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A tube-source X-ray microtomography approach for quantitative 3D microscopy of optically challenging cell-cultured samples. Commun Biol 2020; 3:548. [PMID: 33009501 PMCID: PMC7532209 DOI: 10.1038/s42003-020-01273-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 09/03/2020] [Indexed: 01/23/2023] Open
Abstract
Development and study of cell-cultured constructs, such as tissue-engineering scaffolds or organ-on-a-chip platforms require a comprehensive, representative view on the cells inside the used materials. However, common characteristics of biomedical materials, for example, in porous, fibrous, rough-surfaced, and composite materials, can severely disturb low-energy imaging. In order to image and quantify cell structures in optically challenging samples, we combined labeling, 3D X-ray imaging, and in silico processing into a methodological pipeline. Cell-structure images were acquired by a tube-source X-ray microtomography device and compared to optical references for assessing the visual and quantitative accuracy. The spatial coverage of the X-ray imaging was demonstrated by investigating stem-cell nuclei inside clinically relevant-sized tissue-engineering scaffolds (5x13 mm) that were difficult to examine with the optical methods. Our results highlight the potential of the readily available X-ray microtomography devices that can be used to thoroughly study relative large cell-cultured samples with microscopic 3D accuracy. Tamminen et al. show that a commercial, tube-source µCT device combined with computational image analysis can be used to obtain quantitative 3D data for cellular structures in optically-challenging samples hard to image using other methods.
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Fuoco T, Almas RA, Finne‐Wistrand A. Multipurpose Degradable Physical Adhesive Based on Poly(
d,l
‐lactide‐
co
‐trimethylene Carbonate). MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Tiziana Fuoco
- Department of Fibre and Polymer TechnologyKTH Royal Institute of Technology Teknikringen 56‐58 Stockholm SE 100‐44 Sweden
| | - Ria Afifah Almas
- Department of Fibre and Polymer TechnologyKTH Royal Institute of Technology Teknikringen 56‐58 Stockholm SE 100‐44 Sweden
| | - Anna Finne‐Wistrand
- Department of Fibre and Polymer TechnologyKTH Royal Institute of Technology Teknikringen 56‐58 Stockholm SE 100‐44 Sweden
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3
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Partio N, Ponkilainen VT, Rinkinen V, Honkanen P, Haapasalo H, Laine HJ, Mäenpää HM. Interpositional Arthroplasty of the First Metatarsophalangeal Joint with Bioresorbable Pldla Implant in the Treatment of Hallux Rigidus and Arthritic Hallux Valgus: A 9-Year Case Series Follow-Up. Scand J Surg 2019; 110:93-98. [PMID: 31885327 DOI: 10.1177/1457496919893597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND AND AIMS The interpositional arthroplasty was developed to retain foot function and to relieve pain due to the arthritis of the first metatarsophalangeal joint. The bioabsorbable poly-L-D-lactic acid RegJoint® interpositional implant provides temporary support to the joint, and the implant is subsequently replaced by the patient's own tissue. In this study, we retrospectively examined the results of the poly-L-D-lactic acid interpositional arthroplasty in a 9-year follow-up study among patients with hallux valgus with end-stage arthrosis or hallux rigidus. MATERIAL AND METHODS Eighteen patients and 21 joints underwent interpositional arthroplasty using the poly-L-D-lactic acid implant between February 1997 and October 2002 at Tampere University Hospital. Of these, 15 (83.3%) (21 joints) patients were compliant with clinical examination and radiographic examination in long-term (average 9.4 years) follow-up. The mean age of the patients was 48.3 (from 28 to 67) years at the time of the operation. Six patients underwent the operation due to arthritic hallux valgus and nine patients due to hallux rigidus. RESULTS The mean Ankle Society Hallux Metatarsophalangeal-Interphalangeal Scale and visual analogue scale (VAS) for pain scores improved after the operation in all patients. The decrease of pain (visual analogue scale) after the operation was statistically significant (77.5 vs 10.0; p < 0.001). Postoperative complications were observed in 3 (14.3%) joints of two hallux rigidus patients. For these patients, surgery had only temporarily relieved the pain, and they underwent reoperation with arthrodesis. CONCLUSION In conclusion, interpositional arthroplasty using a poly-L-D-lactic acid implant yielded good results. This study indicates that the poly-L-D-lactic acid interpositional implant may be a good alternative for arthrodesis for treatment of end-stage degeneration of the first metatarsophalangeal joint.
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Affiliation(s)
- N Partio
- Department of Orthopaedics and Traumatology, Tampere University Hospital, Tampere, Finland
| | - V T Ponkilainen
- Department of Orthopaedics and Traumatology, Tampere University Hospital, Tampere, Finland
| | | | - P Honkanen
- Coxa Hospital for Joint Replacement, Tampere, Finland
| | - H Haapasalo
- Department of Orthopaedics and Traumatology, Tampere University Hospital, Tampere, Finland
| | | | - H M Mäenpää
- Department of Orthopaedics and Traumatology, Tampere University Hospital, Tampere, Finland
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4
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Culenova M, Bakos D, Ziaran S, Bodnarova S, Varga I, Danisovic L. Bioengineered Scaffolds as Substitutes for Grafts for Urethra Reconstruction. MATERIALS 2019; 12:ma12203449. [PMID: 31652498 PMCID: PMC6829564 DOI: 10.3390/ma12203449] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 10/16/2019] [Accepted: 10/18/2019] [Indexed: 12/25/2022]
Abstract
Urethral defects originating from congenital malformations, trauma, inflammation or carcinoma still pose a great challenge to modern urology. Recent therapies have failed many times and have not provided the expected results. This negatively affects patients' quality of life. By combining cells, bioactive molecules, and biomaterials, tissue engineering can provide promising treatment options. This review focused on scaffold systems for urethra reconstruction. We also discussed different technologies, such as electrospinning and 3D bioprinting which provide great possibility for the preparation of a hollow structure with well-defined architecture.
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Affiliation(s)
- Martina Culenova
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
| | - Dusan Bakos
- International Centre for Applied Research and Sustainable Technology, Jamnickeho 19, 841 04 Bratislava, Slovakia.
| | - Stanislav Ziaran
- Department of Urology, Faculty of Medicine, Comenius University, Limbova 5, 833 05 Bratislava, Slovakia.
| | - Simona Bodnarova
- Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia.
| | - Ivan Varga
- Institute of Histology and Embryology, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
| | - Lubos Danisovic
- Institute of Medical Biology, Genetics and Clinical Genetics, Faculty of Medicine, Comenius University, Sasinkova 4, 811 08 Bratislava, Slovakia.
- Regenmed Ltd., Medena 29, 811 01 Bratislava, Slovakia.
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Goimil L, Jaeger P, Ardao I, Gómez-Amoza JL, Concheiro A, Alvarez-Lorenzo C, García-González CA. Preparation and stability of dexamethasone-loaded polymeric scaffolds for bone regeneration processed by compressed CO2 foaming. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2017.12.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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6
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McNamara MC, Sharifi F, Wrede AH, Kimlinger DF, Thomas DG, Vander Wiel JB, Chen Y, Montazami R, Hashemi NN. Microfibers as Physiologically Relevant Platforms for Creation of 3D Cell Cultures. Macromol Biosci 2017; 17. [PMID: 29148617 DOI: 10.1002/mabi.201700279] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 09/15/2017] [Indexed: 12/28/2022]
Abstract
Microfibers have received much attention due to their promise for creating flexible and highly relevant tissue models for use in biomedical applications such as 3D cell culture, tissue modeling, and clinical treatments. A generated tissue or implanted material should mimic the natural microenvironment in terms of structural and mechanical properties as well as cell adhesion, differentiation, and growth rate. Therefore, the mechanical and biological properties of the fibers are of importance. This paper briefly introduces common fiber fabrication approaches, provides examples of polymers used in biomedical applications, and then reviews the methods applied to modify the mechanical and biological properties of fibers fabricated using different approaches for creating a highly controlled microenvironment for cell culturing. It is shown that microfibers are a highly tunable and versatile tool with great promise for creating 3D cell cultures with specific properties.
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Affiliation(s)
- Marilyn C McNamara
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Farrokh Sharifi
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Alex H Wrede
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Daniel F Kimlinger
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Deepak-George Thomas
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | | | - Yuanfen Chen
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA
| | - Reza Montazami
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA.,Center of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, IA, 50011, USA
| | - Nicole N Hashemi
- Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, USA.,Center of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, IA, 50011, USA
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8
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Sharifi F, Kurteshi D, Hashemi N. Designing highly structured polycaprolactone fibers using microfluidics. J Mech Behav Biomed Mater 2016; 61:530-540. [PMID: 27136089 DOI: 10.1016/j.jmbbm.2016.04.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 04/02/2016] [Accepted: 04/05/2016] [Indexed: 11/17/2022]
Abstract
Microfibers are becoming increasingly important for biomedical applications such as regenerative medicine and tissue engineering. We have used a microfluidic approach to create polycaprolactone (PCL) microfibers in a controlled manner. Through the variations of the sheath fluid flow rate and PCL concentration in the core solution, the morphology of the microfibers and their cross-sections can be tuned. The microfibers were made using PCL concentrations of 2%, 5%, and 8% in the core fluid with a wide range of sheath-to-core flow rate ratios from 120:5µL/min to 10:5µL/min, respectively. The results revealed that the mechanical properties of the PCL microfibers made using microfluidic approach were significantly improved compared to the PCL microfibers made by other fiber fabrication methods. Additionally, it was demonstrated that by decreasing the flow rate ratio and increasing the PCL concentration, the size of the microfiber could be increased. Varying the sheath-to-core flow rate ratios from 40:5 to 10:5, the tensile stress at break, the tensile strain at break, and the Young׳s modulus were enhanced from 24.51MPa to 77.07MPa, 567% to 1420%, and 247.25MPa to 539.70MPa, respectively. The porosity and roughness of microfiber decreased when the PCL concentration increased from 2% to 8%, whereas changing the flow rate ratio did not have considerable impact on the microfiber roughness.
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Affiliation(s)
- Farrokh Sharifi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
| | - Diamant Kurteshi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA
| | - Nastaran Hashemi
- Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; Center for Advanced Host Defense Immunobiotics and Translational Comparative Medicine, Iowa State University, Ames, IA 50011, USA.
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Hiltunen M, Pelto J, Ellä V, Kellomäki M. Uniform and electrically conductive biopolymer-doped polypyrrole coating for fibrous PLA. J Biomed Mater Res B Appl Biomater 2015; 104:1721-1729. [DOI: 10.1002/jbm.b.33514] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 06/30/2015] [Accepted: 08/23/2015] [Indexed: 01/07/2023]
Affiliation(s)
- M. Hiltunen
- Department of Electronics and Communications Engineering; Tampere University of Technology, BioMediTech; Tampere Finland
| | - J. Pelto
- VTT Technical Research Centre of Finland; Tampere Finland
| | - V. Ellä
- Department of Electronics and Communications Engineering; Tampere University of Technology, BioMediTech; Tampere Finland
| | - M. Kellomäki
- Department of Electronics and Communications Engineering; Tampere University of Technology, BioMediTech; Tampere Finland
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Bat E, Zhang Z, Feijen J, Grijpma DW, Poot AA. Biodegradable elastomers for biomedical applications and regenerative medicine. Regen Med 2014; 9:385-98. [DOI: 10.2217/rme.14.4] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthetic biodegradable polymers are of great value for the preparation of implants that are required to reside only temporarily in the body. The use of biodegradable polymers obviates the need for a second surgery to remove the implant, which is the case when a nondegradable implant is used. After implantation in the body, biomedical devices may be subjected to degradation and erosion. Understanding the mechanisms of these processes is essential for the development of biomedical devices or implants with a specific function, for example, scaffolds for tissue-engineering applications. For the engineering and regeneration of soft tissues (e.g., blood vessels, cardiac muscle and peripheral nerves), biodegradable polymers are needed that are flexible and elastic. The scaffolds prepared from these polymers should have tuneable degradation properties and should perform well under long-term cyclic deformation conditions. The required polymers, which are either physically or chemically crosslinked biodegradable elastomers, are reviewed in this article.
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Affiliation(s)
- Erhan Bat
- University of Twente, Department of Biomaterials Science & Technology, MIRA Institute for Biomedical Technology & Technical Medicine, PO Box 217, 7500 AE Enschede, The Netherlands
- Current affiliation: Middle East Technical University, Department of Chemical Engineering, Dumlupinar Bulvari 1, 06800 Ankara, Turkey
| | - Zheng Zhang
- University of Twente, Department of Biomaterials Science & Technology, MIRA Institute for Biomedical Technology & Technical Medicine, PO Box 217, 7500 AE Enschede, The Netherlands
- Current affiliation: Rutgers University, New Jersey Center for Biomaterials, 145 Bevier Road, Piscataway, NJ 08854, USA
| | - Jan Feijen
- University of Twente, Department of Biomaterials Science & Technology, MIRA Institute for Biomedical Technology & Technical Medicine, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Dirk W Grijpma
- University of Twente, Department of Biomaterials Science & Technology, MIRA Institute for Biomedical Technology & Technical Medicine, PO Box 217, 7500 AE Enschede, The Netherlands
- University Medical Center Groningen & University of Groningen, Department of Biomedical Engineering, WJ Kolff Institute, A Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - André A Poot
- University of Twente, Department of Biomaterials Science & Technology, MIRA Institute for Biomedical Technology & Technical Medicine, PO Box 217, 7500 AE Enschede, The Netherlands
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11
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Microfluidic direct writer with integrated declogging mechanism for fabricating cell-laden hydrogel constructs. Biomed Microdevices 2014; 16:387-95. [DOI: 10.1007/s10544-014-9842-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Tamayol A, Akbari M, Annabi N, Paul A, Khademhosseini A, Juncker D. Fiber-based tissue engineering: Progress, challenges, and opportunities. Biotechnol Adv 2013; 31:669-87. [PMID: 23195284 PMCID: PMC3631569 DOI: 10.1016/j.biotechadv.2012.11.007] [Citation(s) in RCA: 271] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/16/2012] [Accepted: 11/19/2012] [Indexed: 12/28/2022]
Abstract
Tissue engineering aims to improve the function of diseased or damaged organs by creating biological substitutes. To fabricate a functional tissue, the engineered construct should mimic the physiological environment including its structural, topographical, and mechanical properties. Moreover, the construct should facilitate nutrients and oxygen diffusion as well as removal of metabolic waste during tissue regeneration. In the last decade, fiber-based techniques such as weaving, knitting, braiding, as well as electrospinning, and direct writing have emerged as promising platforms for making 3D tissue constructs that can address the abovementioned challenges. Here, we critically review the techniques used to form cell-free and cell-laden fibers and to assemble them into scaffolds. We compare their mechanical properties, morphological features and biological activity. We discuss current challenges and future opportunities of fiber-based tissue engineering (FBTE) for use in research and clinical practice.
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Affiliation(s)
- Ali Tamayol
- Biomedical Engineering Department, McGill University, Montreal, H3A 0G1, Canada
| | - Mohsen Akbari
- Biomedical Engineering Department, McGill University, Montreal, H3A 0G1, Canada
| | - Nasim Annabi
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute ofTechnology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02139, USA
| | - Arghya Paul
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute ofTechnology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02139, USA
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute ofTechnology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts 02139, USA
| | - David Juncker
- Biomedical Engineering Department, McGill University, Montreal, H3A 0G1, Canada
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