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Kim MH, Singh YP, Celik N, Yeo M, Rizk E, Hayes DJ, Ozbolat IT. High-Throughput Bioprinting of Spheroids for Scalable Tissue Fabrication. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.30.601432. [PMID: 39005316 PMCID: PMC11244864 DOI: 10.1101/2024.06.30.601432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/16/2024]
Abstract
Tissue biofabrication that replicates an organ-specific architecture and function requires physiologically-relevant cell densities. Bioprinting using spheroids has the potential to create constructs with native cell densities, but its application is limited due to the lack of practical, scalable techniques. This study presents HITS-Bio (High-throughput Integrated Tissue Fabrication System for Bioprinting), a novel multiarray spheroid bioprinting technology enabling scalable tissue fabrication by rapidly positioning a number of spheroids simultaneously using a digitally-controlled nozzle array (DCNA) platform. HITS-Bio achieves an unprecedented speed, an order of magnitude faster compared to existing techniques while maintaining high cell viability (>90%). The platform's ability to pattern multiple spheroids simultaneously enhances fabrication rates proportionally to the size of DCNA used. The utility of HITS-Bio was exemplified in multiple applications, including intraoperative bioprinting with microRNA transfected spheroids for calvarial bone regeneration (∼30 mm 3 ) in a rat model achieving a near-complete defect closure (∼91% in 3 weeks and ∼96% in 6 weeks). Additionally, the successful fabrication of scalable cartilage constructs (1 cm 3 ) containing ∼600 chondrogenic spheroids highlights its high-throughput efficiency (under 40 min per construct) and potential for repairing volumetric tissue defects.
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Pan R, Lin C, Yang X, Xie Y, Gao L, Yu L. The influence of spheroid maturity on fusion dynamics and micro-tissue assembly in 3D tumor models. Biofabrication 2024; 16:035016. [PMID: 38663395 DOI: 10.1088/1758-5090/ad4392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 04/25/2024] [Indexed: 07/02/2024]
Abstract
Three-dimensional (3D) cell culture has been used in many fields of biology because of its unique advantages. As a representative of the 3D systems, 3D spheroids are used as building blocks for tissue construction. Larger tumor aggregates can be assembled by manipulating or stacking the tumor spheroids. The motivation of this study is to investigate the behavior of the cells distributed at different locations of the spheroids in the fusion process and the mechanism behind it. To this aim, spheroids with varying grades of maturity or age were generated for fusion to assemble micro-tumor tissues. The dynamics of the fusion process, the motility of the cells distributed in different heterogeneous architecture sites, and their reactive oxygen species profiles were studied. We found that the larger the spheroid necrotic core, the slower the fusion rate of the spheroid. The cells that move were mainly distributed on the spheroid's surface during fusion. In addition to dense microfilament distribution and low microtubule content, the reactive oxygen content was high in the fusion site, while the non-fusion site was the opposite. Last, multi-spheroids with different maturities were fused to complex micro-tissues to mimic solid tumors and evaluate Doxorubicin's anti-tumor efficacy.
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Affiliation(s)
- Rong Pan
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, People's Republic of China
| | - Chenyu Lin
- Institute for Developmental and Biology and Regenerative Medicine, Southwest University, Chongqing 400715, People's Republic of China
| | - Xiaoyan Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, People's Republic of China
| | - Yuanyuan Xie
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, People's Republic of China
| | - Lixia Gao
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, College of Pharmacy & International Academy of Targeted Therapeutics and Innovation, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China
| | - Ling Yu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, People's Republic of China
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Zieger V, Frejek D, Zimmermann S, Miotto GAA, Koltay P, Zengerle R, Kartmann S. Towards Automation in 3D Cell Culture: Selective and Gentle High-Throughput Handling of Spheroids and Organoids via Novel Pick-Flow-Drop Principle. Adv Healthc Mater 2024; 13:e2303350. [PMID: 38265410 DOI: 10.1002/adhm.202303350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/28/2023] [Indexed: 01/25/2024]
Abstract
3D cell culture is becoming increasingly important for mimicking physiological tissue structures in areas such as drug discovery and personalized medicine. To enable reproducibility on a large scale, automation technologies for standardized handling are still a challenge. Here, a novel method for fully automated size classification and handling of cell aggregates like spheroids and organoids is presented. Using microfluidic flow generated by a piezoelectric droplet generator, aggregates are aspirated from a reservoir on one side of a thin capillary and deposited on the other side, encapsulated in free-flying nanoliter droplets to a target. The platform has aggregate aspiration and plating efficiencies of 98.1% and 98.4%, respectively, at a processing throughput of up to 21 aggregates per minute. Cytocompatibility of the method is thoroughly assessed with MCF7, LNCaP, A549 spheroids and colon organoids, revealing no adverse effects on cell aggregates as shear stress is reduced compared to manual pipetting. Further, generic size-selective handling of heterogeneous organoid samples, single-aggregate-dispensing efficiencies of up to 100% and the successful embedding of spheroids or organoids in a hydrogel with subsequent proliferation is demonstrated. This platform is a powerful tool for standardized 3D in vitro research.
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Affiliation(s)
- Viktoria Zieger
- Laboratory for MEMS Applications, IMTEK- Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
| | - Daniel Frejek
- Hahn-Schickard, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
| | - Stefan Zimmermann
- Laboratory for MEMS Applications, IMTEK- Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
| | | | - Peter Koltay
- Laboratory for MEMS Applications, IMTEK- Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
| | - Roland Zengerle
- Laboratory for MEMS Applications, IMTEK- Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
- Hahn-Schickard, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
| | - Sabrina Kartmann
- Laboratory for MEMS Applications, IMTEK- Department of Microsystems Engineering, University of Freiburg, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
- Hahn-Schickard, Georges-Koehler-Allee 103, D-79110, Freiburg, Germany
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4
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Hamsho K, Broadwin M, Stone CR, Sellke FW, Abid MR. The Current State of Extracellular Matrix Therapy for Ischemic Heart Disease. Med Sci (Basel) 2024; 12:8. [PMID: 38390858 PMCID: PMC10885030 DOI: 10.3390/medsci12010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/24/2024] Open
Abstract
The extracellular matrix (ECM) is a three-dimensional, acellular network of diverse structural and nonstructural proteins embedded within a gel-like ground substance composed of glycosaminoglycans and proteoglycans. The ECM serves numerous roles that vary according to the tissue in which it is situated. In the myocardium, the ECM acts as a collagen-based scaffold that mediates the transmission of contractile signals, provides means for paracrine signaling, and maintains nutritional and immunologic homeostasis. Given this spectrum, it is unsurprising that both the composition and role of the ECM has been found to be modulated in the context of cardiac pathology. Myocardial infarction (MI) provides a familiar example of this; the ECM changes in a way that is characteristic of the progressive phases of post-infarction healing. In recent years, this involvement in infarct pathophysiology has prompted a search for therapeutic targets: if ECM components facilitate healing, then their manipulation may accelerate recovery, or even reverse pre-existing damage. This possibility has been the subject of numerous efforts involving the integration of ECM-based therapies, either derived directly from biologic sources or bioengineered sources, into models of myocardial disease. In this paper, we provide a thorough review of the published literature on the use of the ECM as a novel therapy for ischemic heart disease, with a focus on biologically derived models, of both the whole ECM and the components thereof.
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Affiliation(s)
- Khaled Hamsho
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA; (K.H.); (M.B.); (C.R.S.); (F.W.S.)
- College of Medicine, Alfaisal University, Riyadh 11533, Saudi Arabia
| | - Mark Broadwin
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA; (K.H.); (M.B.); (C.R.S.); (F.W.S.)
| | - Christopher R. Stone
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA; (K.H.); (M.B.); (C.R.S.); (F.W.S.)
| | - Frank W. Sellke
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA; (K.H.); (M.B.); (C.R.S.); (F.W.S.)
| | - M. Ruhul Abid
- Division of Cardiothoracic Surgery, Department of Surgery, Cardiovascular Research Center, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, RI 02903, USA; (K.H.); (M.B.); (C.R.S.); (F.W.S.)
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Öztürk S, Demir M, Koçkaya EA, Karaaslan C, Süloğlu AK. Establishment of a 3D multicellular placental microtissues for investigating the effect of antidepressant vortioxetine. Reprod Toxicol 2024; 123:108519. [PMID: 38043629 DOI: 10.1016/j.reprotox.2023.108519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Revised: 10/23/2023] [Accepted: 11/30/2023] [Indexed: 12/05/2023]
Abstract
The placenta is a unique organ with an active metabolism and dynamically changing physiology throughout pregnancy. It is difficult to elucidate the structure of cell-cell and cell-extracellular matrix interactions of the placenta in in vivo studies due to interspecies differences and ethical constraints. In this study, human umbilical cord vein cells (HUVEC) and human placental choriocarcinoma cells (BeWo) were co-cultured for the first time to form spheroids (microtissues) on a three-dimensional (3D) Petri Dish® mold and compared with a traditional two-dimensional (2D) system. Vortioxetine is an antidepressant with a lack of literature on its use in pregnancy in established cultures, the toxicity of vortioxetine was studied to investigate the response of spheroids representing placental tissue. Spheroids were characterised by morphology and exposed to vortioxetine. Cell viability and barrier integrity were then measured. Intercellular junctions and the localisation of serotonin transporter (SERT) proteins were demonstrated by immunofluorescence (IF) staining in BeWo cells. Human chorionic gonadotropin (beta-hCG) hormone levels were also measured. In the 3D system, cell viability and hormone production were higher than in the 2D system. It was observed that the barrier structure was impaired, the structure of intracellular skeletal elements was altered and SERT expression decreased depending on vortioxetine exposure. These results demonstrate that the multicellular microtissue placenta model can be used to obtain results that more closely resemble in vivo toxicity studies of various xenobiotics than other 2D and mono-culture spheroid models in the literature. It also describes the use of 3D models for soft tissues other than the placenta.
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Affiliation(s)
- Selen Öztürk
- Hacettepe University, Faculty of Science, Department of Biology, Zoology Section, Beytepe Campus, Ankara, Türkiye
| | - Merve Demir
- Hacettepe University, Faculty of Science, Department of Biology, Zoology Section, Beytepe Campus, Ankara, Türkiye
| | - E Arzu Koçkaya
- Gazi University, The Higher Vocational School of Health Services, Gölbaşı Campus, Ankara, Türkiye
| | - Cagatay Karaaslan
- Hacettepe University, Faculty of Science, Department of Biology, Molecular Biology Section, Beytepe Campus, Ankara, Türkiye
| | - Aysun Kılıç Süloğlu
- Hacettepe University, Faculty of Science, Department of Biology, Zoology Section, Beytepe Campus, Ankara, Türkiye.
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Balhaddad AA, Garcia IM, Mokeem L, Alsahafi R, Majeed-Saidan A, Albagami HH, Khan AS, Ahmad S, Collares FM, Della Bona A, Melo MAS. Three-dimensional (3D) printing in dental practice: Applications, areas of interest, and level of evidence. Clin Oral Investig 2023:10.1007/s00784-023-04983-7. [PMID: 37017759 DOI: 10.1007/s00784-023-04983-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 03/28/2023] [Indexed: 04/06/2023]
Abstract
OBJECTIVES The aim of this review to overview three-dimensional (3D) printing technologies available for different dental disciplines, considering the applicability of such technologies and materials development. MATERIALS AND METHODS Source Arksey and O'Malley's five stages framework using PubMed, EMBASE, and Scopus (Elsevier) databases managed this review. Papers focusing on 3D printing in dentistry and written in English were screened. Scientific productivity by the number of publications, areas of interest, and the focus of the investigations in each dental discipline were extracted. RESULTS Nine hundred thirty-four studies using 3D printing in dentistry were assessed. Limited clinical trials were observed, especially in Restorative, endodontics, and pediatric dentistry. Laboratory or animal studies are not reliable for clinical success, suggesting that clinical trials are a good approach to validate the new methods' outcomes and ensure that the benefits outweigh the risk. The most common application for 3D printing technologies is to facilitate conventional dental procedures. CONCLUSIONS The constantly improving quality of 3D printing applications has contributed to increasing the popularity of these technologies in dentistry; however, long-term clinical studies are necessary to assist in defining standards and endorsing the safe application of 3D printing in dental practice. CLINICAL RELEVANCE The recent progress in 3D materials has improved dental practice capabilities over the last decade. Understanding the current status of 3D printing in dentistry is essential to facilitate translating its applications from laboratory to the clinical setting.
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Affiliation(s)
- Abdulrahman A Balhaddad
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O.Box 1982, Dammam, 31441, Saudi Arabia.
| | - Isadora Martini Garcia
- Clinical Assistant Professor, Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, MD, 21201, USA
| | - Lamia Mokeem
- Ph.D. Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland, USA
| | - Rashed Alsahafi
- Department of Restorative Dental Sciences, College of Dentistry, Umm Al-Qura University, Makkah, 24381, Saudi Arabia
| | - Ahmad Majeed-Saidan
- Division of Prosthodontics, Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, 21201, USA
| | - Hathal H Albagami
- Department of Restorative Dental Sciences, College of Dentistry, Taibah University, Medina, 42353, Saudi Arabia
| | - Abdul Samad Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O.Box 1982, Dammam, 31441, Saudi Arabia
| | - Shakil Ahmad
- Directorate of Library Affairs, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam, 31441, Kingdom of Saudi Arabia
| | - Fabricio Mezzomo Collares
- Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Alvaro Della Bona
- Postgraduate Program in Dentistry, Dental School, University of Passo Fundo, Passo Fundo, Brazil
| | - Mary Anne S Melo
- Ph.D. Program in Dental Biomedical Sciences, University of Maryland School of Dentistry, Baltimore, Maryland, USA.
- Division of Operative Dentistry, Department of General Dentistry, University of Maryland School of Dentistry, Baltimore, Maryland, USA.
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7
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Ellison ST, Duraivel S, Subramaniam V, Hugosson F, Yu B, Lebowitz JJ, Khoshbouei H, Lele TP, Martindale MQ, Angelini TE. Cellular micromasonry: biofabrication with single cell precision. SOFT MATTER 2022; 18:8554-8560. [PMID: 36350122 DOI: 10.1039/d2sm01013e] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In many tissues, cell type varies over single-cell length-scales, creating detailed heterogeneities fundamental to physiological function. To gain understanding of the relationship between tissue function and detailed structure, and eventually to engineer structurally and physiologically accurate tissues, we need the ability to assemble 3D cellular structures having the level of detail found in living tissue. Here we introduce a method of 3D cell assembly having a level of precision finer than the single-cell scale. With this method we create detailed cellular patterns, demonstrating that cell type can be varied over the single-cell scale and showing function after their assembly.
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Affiliation(s)
- S Tori Ellison
- Department of Material Sciences and Engineering, University of Florida, Gainesville, Florida 32611, USA.
| | - Senthilkumar Duraivel
- Department of Material Sciences and Engineering, University of Florida, Gainesville, Florida 32611, USA.
| | - Vignesh Subramaniam
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - Fredrik Hugosson
- The Whitney Laboratory for Marine Bioscience, St. Augustine, Florida 32080, USA
| | - Bo Yu
- Department of Chemical Engineering, University of Florida, Gainesville, Florida 32611, USA
| | - Joseph J Lebowitz
- Department of Neuroscience, University of Florida, Gainesville, Florida 32611, USA
| | - Habibeh Khoshbouei
- Department of Neuroscience, University of Florida, Gainesville, Florida 32611, USA
| | - Tanmay P Lele
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, USA
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77843, USA
- Department of Translational Medical Sciences, Texas A&M University, Houston, Texas 77843, USA
| | - Mark Q Martindale
- The Whitney Laboratory for Marine Bioscience, St. Augustine, Florida 32080, USA
| | - Thomas E Angelini
- Department of Material Sciences and Engineering, University of Florida, Gainesville, Florida 32611, USA.
- Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, Florida 32611, USA
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8
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Vuille-Dit-Bille E, Deshmukh DV, Connolly S, Heub S, Boder-Pasche S, Dual J, Tibbitt MW, Weder G. Tools for manipulation and positioning of microtissues. LAB ON A CHIP 2022; 22:4043-4066. [PMID: 36196619 DOI: 10.1039/d2lc00559j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Complex three-dimensional (3D) in vitro models are emerging as a key technology to support research areas in personalised medicine, such as drug development and regenerative medicine. Tools for manipulation and positioning of microtissues play a crucial role in the microtissue life cycle from production to end-point analysis. The ability to precisely locate microtissues can improve the efficiency and reliability of processes and investigations by reducing experimental time and by providing more controlled parameters. To achieve this goal, standardisation of the techniques is of primary importance. Compared to microtissue production, the field of microtissue manipulation and positioning is still in its infancy but is gaining increasing attention in the last few years. Techniques to position microtissues have been classified into four main categories: hydrodynamic techniques, bioprinting, substrate modification, and non-contact active forces. In this paper, we provide a comprehensive review of the different tools for the manipulation and positioning of microtissues that have been reported to date. The working mechanism of each technique is described, and its merits and limitations are discussed. We conclude by evaluating the potential of the different approaches to support progress in personalised medicine.
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Affiliation(s)
- Emilie Vuille-Dit-Bille
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
- MicroBioRobotic Systems Laboratory, Institute of Mechanical Engineering, EPFL, Lausanne, Switzerland
| | - Dhananjay V Deshmukh
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Sinéad Connolly
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, Zurich, Switzerland
| | - Sarah Heub
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
| | | | - Jürg Dual
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Gilles Weder
- Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland.
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Banerjee D, Singh YP, Datta P, Ozbolat V, O'Donnell A, Yeo M, Ozbolat IT. Strategies for 3D bioprinting of spheroids: A comprehensive review. Biomaterials 2022; 291:121881. [DOI: 10.1016/j.biomaterials.2022.121881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 10/04/2022] [Accepted: 10/23/2022] [Indexed: 11/17/2022]
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10
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Coplanar embedding of multiple 3D cell models in hydrogel towards high-throughput micro-histology. Sci Rep 2022; 12:9991. [PMID: 35705590 PMCID: PMC9200833 DOI: 10.1038/s41598-022-13987-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 05/31/2022] [Indexed: 11/25/2022] Open
Abstract
Standardised and high-throughput methods have been developed for the production and experimental handling of some 3D in vitro models. However, adapted analytical tools are still missing for scientists and researchers to fully exploit the potential of complex cellular models in pre-clinical drug testing and precision medicine. Histology is the established, cost-effective and gold standard method for structural and functional tissue analysis. However, standard histological processes are challenging and costly to apply to 3D cell models, as their small size often leads to poor alignment of samples, which lowers analysis throughput. This body of work proposes a new approach: HistoBrick facilitates histological processing of spheroids and organoids by enabling gel embedding of 3D cell models with precise coplanar alignment, parallel to the sectioning plane, thus minimising the loss of sample material. HistoBrick’s features are compatible with automation standards, potentially allowing automated sample transfer from a multi-well plate to the gel device. Moreover, HistoBrick’s technology was validated by demonstrating the alignment of HepG2 cultured spheroids measuring 150–200 µm in diameter with a height precision of ± 80 µm. HistoBrick allows up to 96 samples to be studied across minimal sections, paving the way towards high-throughput micro-histology.
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11
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Hybrid spheroid microscaffolds as modular tissue units to build macro-tissue assemblies for tissue engineering. Acta Biomater 2022:S1742-7061(22)00141-6. [PMID: 35288312 DOI: 10.1016/j.actbio.2022.03.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 03/02/2022] [Accepted: 03/07/2022] [Indexed: 12/25/2022]
Abstract
Since its inception, tissue engineering and regenerative medicine (TERM) has been relying on either scaffold-based or scaffold-free strategies. Recent reports outlined the possibility of a synergistic, convergence approach, referred to as the third TERM strategy, which could alleviate bottlenecks of the two previous options. This strategy requires the fabrication of highly porous microscaffolds, allowing to create single spheroids within each of them. The resulting tissue units can then be combined and used as modular building blocks for creating tissue constructs through a bottom-up self-assembly. Such strategy can have a significant impact for the future of TERM, but so far, no reports have assessed its feasibility in detail. This work reports a first systematic study, which includes a comparison of the in vitro behavior of tissue units based on adipose derived stem cell spheroids cultured within microscaffolds versus conventional spheroids. We first proved that the presence of the microscaffold neither impairs the cells 'ability to form spheroids nor impacts their viability. Importantly, the fusiogenic and the differentiation potential (i.e. chondrogenesis and osteogenesis), which are important features for cellularized building blocks to be used in TERM, are preserved when spheroids are cultured within microscaffolds. Significant benefits of microscaffold-based tissue units include the enhanced cell retention, the decreased compaction and the better control over the size observed when larger tissue constructs are formed through self-assembly. The proof of concept study presented here demonstrates the great potential offered by those microsize tissue units to be used as building blocks for directed tissue self-assembly. STATEMENT OF SIGNIFICANCE: One of the most exciting and recent advances in tissue engineering and regenerative medicine (TERM) is to combine together multiple micro-size cellularized units, which are able to self-assemble altogether to recreate larger tissue constructs. In this work, we produce such modules by forming single spheroids within highly porous microscaffolds, and study how this new microenvironment impacts on the spheroid's behavior and stemness potential. This work highlights as well that such novel route is enabled by two-photon polymerization, which is an additive manufacturing technique offering high spatial resolution down to 100 nm. These findings provide a first scientific evidence about the utilization of hybrid spheroid microscaffold-based tissue units with great perspective as a modular tool for TERM.
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12
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Hull SM, Brunel LG, Heilshorn SC. 3D Bioprinting of Cell-Laden Hydrogels for Improved Biological Functionality. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2103691. [PMID: 34672027 PMCID: PMC8988886 DOI: 10.1002/adma.202103691] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 09/15/2021] [Indexed: 05/03/2023]
Abstract
The encapsulation of cells within gel-phase materials to form bioinks offers distinct advantages for next-generation 3D bioprinting. 3D bioprinting has emerged as a promising tool for patterning cells, but the technology remains limited in its ability to produce biofunctional, tissue-like constructs due to a dearth of materials suitable for bioinks. While early demonstrations commonly used viscous polymers optimized for printability, these materials often lacked cell compatibility and biological functionality. In response, advanced materials that exist in the gel phase during the entire printing process are being developed, since hydrogels are uniquely positioned to both protect cells during extrusion and provide biological signals to embedded cells as the construct matures during culture. Here, an overview of the design considerations for gel-phase materials as bioinks is presented, with a focus on their mechanical, biochemical, and dynamic gel properties. Current challenges and opportunities that arise due to the fact that bioprinted constructs are active, living hydrogels composed of both acellular and cellular components are also evaluated. Engineering hydrogels with consideration of cells as an intrinsic component of the printed bioink will enable control over the evolution of the living construct after printing to achieve greater biofunctionality.
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Affiliation(s)
- Sarah M Hull
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Lucia G Brunel
- Department of Chemical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Sarah C Heilshorn
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA
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13
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Elkhoury K, Morsink M, Sanchez-Gonzalez L, Kahn C, Tamayol A, Arab-Tehrany E. Biofabrication of natural hydrogels for cardiac, neural, and bone Tissue engineering Applications. Bioact Mater 2021; 6:3904-3923. [PMID: 33997485 PMCID: PMC8080408 DOI: 10.1016/j.bioactmat.2021.03.040] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 03/05/2021] [Accepted: 03/26/2021] [Indexed: 12/13/2022] Open
Abstract
Natural hydrogels are one of the most promising biomaterials for tissue engineering applications, due to their biocompatibility, biodegradability, and extracellular matrix mimicking ability. To surpass the limitations of conventional fabrication techniques and to recapitulate the complex architecture of native tissue structure, natural hydrogels are being constructed using novel biofabrication strategies, such as textile techniques and three-dimensional bioprinting. These innovative techniques play an enormous role in the development of advanced scaffolds for various tissue engineering applications. The progress, advantages, and shortcomings of the emerging biofabrication techniques are highlighted in this review. Additionally, the novel applications of biofabricated natural hydrogels in cardiac, neural, and bone tissue engineering are discussed as well.
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Affiliation(s)
| | - Margaretha Morsink
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7500AE, the Netherlands
| | | | - Cyril Kahn
- LIBio, Université de Lorraine, Nancy, F-54000, France
| | - Ali Tamayol
- Department of Biomedical Engineering, University of Connecticut, Farmington, CT, 06030, USA
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14
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Zhuang P, Chiang YH, Fernanda MS, He M. Using Spheroids as Building Blocks Towards 3D Bioprinting of Tumor Microenvironment. Int J Bioprint 2021; 7:444. [PMID: 34805601 PMCID: PMC8600307 DOI: 10.18063/ijb.v7i4.444] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/02/2021] [Indexed: 12/12/2022] Open
Abstract
Cancer still ranks as a leading cause of mortality worldwide. Although considerable efforts have been dedicated to anticancer therapeutics, progress is still slow, partially due to the absence of robust prediction models. Multicellular tumor spheroids, as a major three-dimensional (3D) culture model exhibiting features of avascular tumors, gained great popularity in pathophysiological studies and high throughput drug screening. However, limited control over cellular and structural organization is still the key challenge in achieving in vivo like tissue microenvironment. 3D bioprinting has made great strides toward tissue/organ mimicry, due to its outstanding spatial control through combining both cells and materials, scalability, and reproducibility. Prospectively, harnessing the power from both 3D bioprinting and multicellular spheroids would likely generate more faithful tumor models and advance our understanding on the mechanism of tumor progression. In this review, the emerging concept on using spheroids as a building block in 3D bioprinting for tumor modeling is illustrated. We begin by describing the context of the tumor microenvironment, followed by an introduction of various methodologies for tumor spheroid formation, with their specific merits and drawbacks. Thereafter, we present an overview of existing 3D printed tumor models using spheroids as a focus. We provide a compilation of the contemporary literature sources and summarize the overall advancements in technology and possibilities of using spheroids as building blocks in 3D printed tissue modeling, with a particular emphasis on tumor models. Future outlooks about the wonderous advancements of integrated 3D spheroidal printing conclude this review.
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Affiliation(s)
- Pei Zhuang
- Department of Pharmaceutics, University of Florida, Gainesville, Florida, 32610, USA
| | - Yi-Hua Chiang
- Department of Pharmaceutics, University of Florida, Gainesville, Florida, 32610, USA
| | | | - Mei He
- Department of Pharmaceutics, University of Florida, Gainesville, Florida, 32610, USA
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15
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Nilsson Hall G, Rutten I, Lammertyn J, Eberhardt J, Geris L, Luyten FP, Papantoniou I. Cartilaginous spheroid-assembly design considerations for endochondral ossification: towards robotic-driven biomanufacturing. Biofabrication 2021; 13. [PMID: 34450613 DOI: 10.1088/1758-5090/ac2208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Accepted: 08/27/2021] [Indexed: 12/26/2022]
Abstract
Spheroids have become essential building blocks for biofabrication of functional tissues. Spheroid formats allow high cell-densities to be efficiently engineered into tissue structures closely resembling the native tissues. In this work, we explore the assembly capacity of cartilaginous spheroids (d∼ 150µm) in the context of endochondral bone formation. The fusion capacity of spheroids at various degrees of differentiation was investigated and showed decreased kinetics as well as remodeling capacity with increased spheroid maturity. Subsequently, design considerations regarding the dimensions of engineered spheroid-based cartilaginous mesotissues were explored for the corresponding time points, defining critical dimensions for these type of tissues as they progressively mature. Next, mesotissue assemblies were implanted subcutaneously in order to investigate the influence of spheroid fusion parameters on endochondral ossification. Moreover, as a step towards industrialization, we demonstrated a novel automated image-guided robotics process, based on targeting and registering single-spheroids, covering the range of spheroid and mesotissue dimensions investigated in this work. This work highlights a robust and automated high-precision biomanufacturing roadmap for producing spheroid-based implants for bone regeneration.
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Affiliation(s)
- Gabriella Nilsson Hall
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium.,Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium
| | - Iene Rutten
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Box 2428, 3001 Leuven, Belgium
| | - Jeroen Lammertyn
- Department of Biosystems, Biosensors Group, KU Leuven, Willem de Croylaan 42, Box 2428, 3001 Leuven, Belgium
| | | | - Liesbet Geris
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium.,GIGA in silico medicine, Université de Liège, Avenue de l'Hôpital 11-BAT 34, 4000 Liège 1, Belgium.,Biomechanics Section, KU Leuven, Celestijnenlaan 300C, PB 2419, 3001 Leuven, Belgium
| | - Frank P Luyten
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium.,Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium
| | - Ioannis Papantoniou
- Prometheus Division of Skeletal Tissue Engineering, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium.,Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, O&N1, Herestraat 49, PB 813, 3000 Leuven, Belgium.,Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas, Stadiou 26504, Platani, Patras, Greece
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16
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Rahimnejad M, Nasrollahi Boroujeni N, Jahangiri S, Rabiee N, Rabiee M, Makvandi P, Akhavan O, Varma RS. Prevascularized Micro-/Nano-Sized Spheroid/Bead Aggregates for Vascular Tissue Engineering. NANO-MICRO LETTERS 2021; 13:182. [PMID: 34409511 PMCID: PMC8374027 DOI: 10.1007/s40820-021-00697-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 07/13/2021] [Indexed: 05/02/2023]
Abstract
Efficient strategies to promote microvascularization in vascular tissue engineering, a central priority in regenerative medicine, are still scarce; nano- and micro-sized aggregates and spheres or beads harboring primitive microvascular beds are promising methods in vascular tissue engineering. Capillaries are the smallest type and in numerous blood vessels, which are distributed densely in cardiovascular system. To mimic this microvascular network, specific cell components and proangiogenic factors are required. Herein, advanced biofabrication methods in microvascular engineering, including extrusion-based and droplet-based bioprinting, Kenzan, and biogripper approaches, are deliberated with emphasis on the newest works in prevascular nano- and micro-sized aggregates and microspheres/microbeads.
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Affiliation(s)
- Maedeh Rahimnejad
- Biomedical Engineering Institute, School of Medicine, Université de Montréal, Montreal, Canada
- Research Centre, Centre Hospitalier de L'Université de Montréal (CRCHUM), Montreal, Canada
| | | | - Sepideh Jahangiri
- Research Centre, Centre Hospitalier de L'Université de Montréal (CRCHUM), Montreal, Canada
- Department of Biomedical Sciences, Faculty of Medicine, Université de Montréal, Montreal, Canada
| | - Navid Rabiee
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran.
| | - Mohammad Rabiee
- Biomaterial Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Pooyan Makvandi
- Centre for Materials Interfaces, Istituto Italiano Di Tecnologia, viale Rinaldo Piaggio 34, 56 025, Pontedera, Pisa, Italy
| | - Omid Akhavan
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran.
| | - Rajender S Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacky University, Šlechtitelů 27, 783 71, Olomouc, Czech Republic.
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17
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Sedlakova V, McTiernan C, Cortes D, Suuronen EJ, Alarcon EI. 3D Bioprinted Cardiac Tissues and Devices for Tissue Maturation. Cells Tissues Organs 2021; 211:406-419. [PMID: 33677445 DOI: 10.1159/000512792] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 10/27/2020] [Indexed: 11/19/2022] Open
Abstract
Cardiovascular diseases are the leading cause of mortality worldwide. Given the limited endogenous regenerative capabilities of cardiac tissue, patient-specific anatomy, challenges in treatment options, and shortage of donor tissues for transplantation, there is an urgent need for novel approaches in cardiac tissue repair. 3D bioprinting is a technology based on additive manufacturing which allows for the design of precisely controlled and spatially organized structures, which could possibly lead to solutions in cardiac tissue repair. In this review, we describe the basic morphological and physiological specifics of the heart and cardiac tissues and introduce the readers to the fundamental principles underlying 3D printing technology and some of the materials/approaches which have been used to date for cardiac repair. By summarizing recent progress in 3D printing of cardiac tissue and valves with respect to the key features of cardiovascular tissue (such as contractility, conductivity, and vascularization), we highlight how 3D printing can facilitate surgical planning and provide custom-fit implants and properties that match those from the native heart. Finally, we also discuss the suitability of this technology in the design and fabrication of custom-made devices intended for the maturation of the cardiac tissue, a process that has been shown to increase the viability of implants. Altogether this review shows that 3D printing and bioprinting are versatile and highly modulative technologies with wide applications in cardiac regeneration and beyond.
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Affiliation(s)
- Veronika Sedlakova
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada.,Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czechia
| | - Christopher McTiernan
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - David Cortes
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Erik J Suuronen
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
| | - Emilio I Alarcon
- BEaTS Research, Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada, .,Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada,
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18
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Shiwarski DJ, Hudson AR, Tashman JW, Feinberg AW. Emergence of FRESH 3D printing as a platform for advanced tissue biofabrication. APL Bioeng 2021; 5:010904. [PMID: 33644626 PMCID: PMC7889293 DOI: 10.1063/5.0032777] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/06/2021] [Indexed: 12/15/2022] Open
Abstract
In tissue engineering, an unresolved challenge is how to build complex 3D scaffolds in order to recreate the structure and function of human tissues and organs. Additive manufacturing techniques, such as 3D bioprinting, have the potential to build biological material with unprecedented spatial control; however, printing soft biological materials in air often results in poor fidelity. Freeform Reversible Embedding of Suspended Hydrogels (FRESH) is an embedded printing approach that solves this problem by extruding bioinks within a yield-stress support bath that holds the bioinks in place until cured. In this Perspective, we discuss the challenges of 3D printing soft and liquid-like bioinks and the emergence for FRESH and related embedded printing techniques as a solution. This includes the development of FRESH and embedded 3D printing within the bioprinting field and the rapid growth in adoption, as well as the advantages of FRESH printing for biofabrication and the new research results this has enabled. Specific focus is on the customizability of the FRESH printing technique where the chemical composition of the yield-stress support bath and aqueous phase crosslinker can all be tailored for printing a wide range of bioinks in complex 3D structures. Finally, we look ahead at the future of FRESH printing, discussing both the challenges and the opportunities that we see as the biofabrication field develops.
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Affiliation(s)
- Daniel J. Shiwarski
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - Andrew R. Hudson
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
| | - Joshua W. Tashman
- Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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19
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Moldovan NI. Three-Dimensional Bioprinting of Anatomically Realistic Tissue Constructs for Disease Modeling and Drug Testing. Tissue Eng Part C Methods 2021; 27:225-231. [PMID: 33446076 DOI: 10.1089/ten.tec.2020.0293] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Three-dimensional (3D) bioprinting is an emerging tissue engineering technology, already with several remarkable accomplishments and with more promises to fulfill. Besides the enduring goal of making tissues for implantation, it could also become an essential tool in the worldwide trend to replace animal experimentation with improved in vitro models for disease mechanism studies, or with new high-throughput pharmacological and toxicology assays. All these require the speed, reproducibility, and standardization that bioprinting could easily provide. However, originating from additive manufacturing with its top-down approach of "filling" a virtual volume with a semifluid (hydrogel) material, the finer internal anatomic structure of the tissues, as well as vascularization and innervation, has remained difficult to implement. Thus, the next frontier in bioprinting is the generation of more anatomically realistic models, needed for ascending to the functionality of living tissues. In this study, I discuss the conceptual and practical barriers still hampering the attainment of this goal and suggest solutions to overcome them. In this regard, I introduce two workflows that combine existing methods in new operational sequences: (1) bioprinting guided by images of histological sections assembled in 3D constructs and (2) bioprinting of bidimensional vascular patterns implemented among stackable cellular layers. While more sophisticated methods to capture the tissue structure in 3D constructs certainly exist, I contend that extrusion bioprinting may still offer a simple, practical, and affordable option. Impact statement Paucity of anatomic structural details is one of the limitations of three-dimensional bioprinting toward fulfilling its potential for tissue engineering, drug testing, and toxicological assays. The origins of this problem can be tracked back to derivation of bioprinting from inorganic additive manufacturing, making it more adept to render the shapes of the objects than their content. As solutions, I suggest two simple workflows that can be implemented by most current bioprinters, based on the import into the construct design of anatomically realistic structural information. If more largely adopted, these and similar approaches may significantly improve the applicability of bioprinted constructs.
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Affiliation(s)
- Nicanor I Moldovan
- Indiana Institute for Medical Research at "Richard L. Roudebush" VA Medical Center, Indianapolis, Indiana, USA.,Department of Ophthalmology, IU School of Medicine, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana, USA
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20
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Kouroupis D, Correa D. Increased Mesenchymal Stem Cell Functionalization in Three-Dimensional Manufacturing Settings for Enhanced Therapeutic Applications. Front Bioeng Biotechnol 2021; 9:621748. [PMID: 33644016 PMCID: PMC7907607 DOI: 10.3389/fbioe.2021.621748] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Accepted: 01/07/2021] [Indexed: 12/23/2022] Open
Abstract
Mesenchymal stem/stromal cell (MSC) exist within their in vivo niches as part of heterogeneous cell populations, exhibiting variable stemness potential and supportive functionalities. Conventional extensive 2D in vitro MSC expansion, aimed at obtaining clinically relevant therapeutic cell numbers, results in detrimental effects on both cellular characteristics (e.g., phenotypic changes and senescence) and functions (e.g., differentiation capacity and immunomodulatory effects). These deleterious effects, added to the inherent inter-donor variability, negatively affect the standardization and reproducibility of MSC therapeutic potential. The resulting manufacturing challenges that drive the qualitative variability of MSC-based products is evident in various clinical trials where MSC therapeutic efficacy is moderate or, in some cases, totally insufficient. To circumvent these limitations, various in vitro/ex vivo techniques have been applied to manufacturing protocols to induce specific features, attributes, and functions in expanding cells. Exposure to inflammatory cues (cell priming) is one of them, however, with untoward effects such as transient expression of HLA-DR preventing allogeneic therapeutic schemes. MSC functionalization can be also achieved by in vitro 3D culturing techniques, in an effort to more closely recapitulate the in vivo MSC niche. The resulting spheroid structures provide spatial cell organization with increased cell–cell interactions, stable, or even enhanced phenotypic profiles, and increased trophic and immunomodulatory functionalities. In that context, MSC 3D spheroids have shown enhanced “medicinal signaling” activities and increased homing and survival capacities upon transplantation in vivo. Importantly, MSC spheroids have been applied in various preclinical animal models including wound healing, bone and osteochondral defects, and cardiovascular diseases showing safety and efficacy in vivo. Therefore, the incorporation of 3D MSC culturing approach into cell-based therapy would significantly impact the field, as more reproducible clinical outcomes may be achieved without requiring ex vivo stimulatory regimes. In the present review, we discuss the MSC functionalization in 3D settings and how this strategy can contribute to an improved MSC-based product for safer and more effective therapeutic applications.
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Affiliation(s)
- Dimitrios Kouroupis
- Department of Orthopedics, UHealth Sports Medicine Institute, University of Miami, Miller School of Medicine, Miami, FL, United States.,Diabetes Research Institute & Cell Transplantation Center, University of Miami, Miller School of Medicine, Miami, FL, United States
| | - Diego Correa
- Department of Orthopedics, UHealth Sports Medicine Institute, University of Miami, Miller School of Medicine, Miami, FL, United States.,Diabetes Research Institute & Cell Transplantation Center, University of Miami, Miller School of Medicine, Miami, FL, United States
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21
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Ouyang L, Armstrong JPK, Chen Q, Lin Y, Stevens MM. Void-free 3D Bioprinting for In-situ Endothelialization and Microfluidic Perfusion. ADVANCED FUNCTIONAL MATERIALS 2020; 30:1909009. [PMID: 35677899 PMCID: PMC7612826 DOI: 10.1002/adfm.201909009] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Two major challenges of 3D bioprinting are the retention of structural fidelity and efficient endothelialization for tissue vascularization. We address both of these issues by introducing a versatile 3D bioprinting strategy, in which a templating bioink is deposited layer-by-layer alongside a matrix bioink to establish void-free multimaterial structures. After crosslinking the matrix phase, the templating phase is sacrificed to create a well-defined 3D network of interconnected tubular channels. This void-free 3D printing (VF-3DP) approach circumvents the traditional concerns of structural collapse, deformation and oxygen inhibition, moreover, it can be readily used to print materials that are widely considered "unprintable". By pre-loading endothelial cells into the templating bioink, the inner surface of the channels can be efficiently cellularized with a confluent endothelial layer. This in-situ endothelialization method can be used to produce endothelium with a far greater uniformity than can be achieved using the conventional post-seeding approach. This VF-3DP approach can also be extended beyond tissue fabrication and towards customized hydrogel-based microfluidics and self-supported perfusable hydrogel constructs.
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22
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Manning KL, Feder J, Kanellias M, Murphy J, Morgan JR. Toward Automated Additive Manufacturing of Living Bio-Tubes Using Ring-Shaped Building Units. SLAS Technol 2020; 25:608-620. [PMID: 32452278 DOI: 10.1177/2472630320920896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Tissue engineering has been largely confined to academic research institutions with limited success in commercial settings. To help address this issue, more work is needed to develop new automated manufacturing processes for tissue-related technologies. In this article, we describe the automation of the funnel-guide, an additive manufacturing method that uses living tissue rings as building units to form bio-tubes. We developed a method based on 96-well plates and a modified off-the-shelf liquid-handling robot to retrieve, perform real-time quality control, and transfer tissue rings to the funnel-guide. Cells seeded into 96-well plates containing specially designed agarose micromolds self-assembled and formed ring-shaped microtissues that could be retrieved using a liquid-handling robot. We characterized the effects of time, cell type, and mold geometry on the morphology of the ring-shaped microtissues to inform optimal use of the building parts. We programmed and modified an off-the-shelf liquid-handling robot to retrieve ring-shaped microtissues from the 96-well plates, and we fabricated a custom illuminated pipette to visualize each ring-shaped microtissue prior to deposit in the funnel guide. Imaging at the liquid-air interface presented challenges that were overcome by controlling lighting conditions and liquid curvature. Based on these images, we incorporated into our workflow a real-time quality control step based on visual inspection and morphological criteria to assess each ring prior to use. We used this system to fabricate bio-tubes of endothelial cells with luminal alignment.
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Affiliation(s)
- Kali L Manning
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
- Center for Biomedical Engineering, Brown University, Providence, RI, USA
| | - Jacob Feder
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
| | - Marianne Kanellias
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
- Center for Biomedical Engineering, Brown University, Providence, RI, USA
| | - John Murphy
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
| | - Jeffrey R Morgan
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
- Center for Biomedical Engineering, Brown University, Providence, RI, USA
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23
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Ayan B, Heo DN, Zhang Z, Dey M, Povilianskas A, Drapaca C, Ozbolat IT. Aspiration-assisted bioprinting for precise positioning of biologics. SCIENCE ADVANCES 2020; 6:eaaw5111. [PMID: 32181332 PMCID: PMC7060055 DOI: 10.1126/sciadv.aaw5111] [Citation(s) in RCA: 141] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 12/13/2019] [Indexed: 05/13/2023]
Abstract
Three-dimensional (3D) bioprinting is an appealing approach for building tissues; however, bioprinting of mini-tissue blocks (i.e., spheroids) with precise control on their positioning in 3D space has been a major obstacle. Here, we unveil "aspiration-assisted bioprinting (AAB)," which enables picking and bioprinting biologics in 3D through harnessing the power of aspiration forces, and when coupled with microvalve bioprinting, it facilitated different biofabrication schemes including scaffold-based or scaffold-free bioprinting at an unprecedented placement precision, ~11% with respect to the spheroid size. We studied the underlying physical mechanism of AAB to understand interactions between aspirated viscoelastic spheroids and physical governing forces during aspiration and bioprinting. We bioprinted a wide range of biologics with dimensions in an order-of-magnitude range including tissue spheroids (80 to 600 μm), tissue strands (~800 μm), or single cells (electrocytes, ~400 μm), and as applications, we illustrated the patterning of angiogenic sprouting spheroids and self-assembly of osteogenic spheroids.
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Affiliation(s)
- Bugra Ayan
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
| | - Dong Nyoung Heo
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Department of Dental Materials, School of Dentistry, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Zhifeng Zhang
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
| | - Madhuri Dey
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Department of Chemistry, Penn State University, University Park, PA 16802, USA
| | - Adomas Povilianskas
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
| | - Corina Drapaca
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
| | - Ibrahim T. Ozbolat
- Engineering Science and Mechanics Department, Penn State University, University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Biomedical Engineering Department, Penn State University, University Park, PA 16802, USA
- Materials Research Institute, Penn State University, University Park, PA 16802, USA
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24
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Sego TJ, Prideaux M, Sterner J, McCarthy BP, Li P, Bonewald LF, Ekser B, Tovar A, Jeshua Smith L. Computational fluid dynamic analysis of bioprinted self-supporting perfused tissue models. Biotechnol Bioeng 2019; 117:798-815. [PMID: 31788785 PMCID: PMC7015804 DOI: 10.1002/bit.27238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/12/2019] [Accepted: 11/22/2019] [Indexed: 01/11/2023]
Abstract
Natural tissues are incorporated with vasculature, which is further integrated with a cardiovascular system responsible for driving perfusion of nutrient‐rich oxygenated blood through the vasculature to support cell metabolism within most cell‐dense tissues. Since scaffold‐free biofabricated tissues being developed into clinical implants, research models, and pharmaceutical testing platforms should similarly exhibit perfused tissue‐like structures, we generated a generalizable biofabrication method resulting in self‐supporting perfused (SSuPer) tissue constructs incorporated with perfusible microchannels and integrated with the modular FABRICA perfusion bioreactor. As proof of concept, we perfused an MLO‐A5 osteoblast‐based SSuPer tissue in the FABRICA. Although our resulting SSuPer tissue replicated vascularization and perfusion observed in situ, supported its own weight, and stained positively for mineral using Von Kossa staining, our in vitro results indicated that computational fluid dynamics (CFD) should be used to drive future construct design and flow application before further tissue biofabrication and perfusion. We built a CFD model of the SSuPer tissue integrated in the FABRICA and analyzed flow characteristics (net force, pressure distribution, shear stress, and oxygen distribution) through five SSuPer tissue microchannel patterns in two flow directions and at increasing flow rates. Important flow parameters include flow direction, fully developed flow, and tissue microchannel diameters matched and aligned with bioreactor flow channels. We observed that the SSuPer tissue platform is capable of providing direct perfusion to tissue constructs and proper culture conditions (oxygenation, with controllable shear and flow rates), indicating that our approach can be used to biofabricate tissue representing primary tissues and that we can model the system in silico.
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Affiliation(s)
- T J Sego
- Department of Intelligent Systems Engineering, Indiana University, Bloomington, Indiana
| | - Matthew Prideaux
- Indiana Center for Musculoskeletal Health, Indiana University, Indianapolis, Indiana.,Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Jane Sterner
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana.,3D Bioprinting Core, Indiana University School of Medicine, Indianapolis, Indiana
| | - Brian Paul McCarthy
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Ping Li
- Division of Transplant Surgery, Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Lynda F Bonewald
- Indiana Center for Musculoskeletal Health, Indiana University, Indianapolis, Indiana.,Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, Indiana.,Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Burcin Ekser
- Division of Transplant Surgery, Department of Surgery, Indiana University School of Medicine, Indianapolis, Indiana
| | - Andres Tovar
- Department of Mechanical and Energy Engineering, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana
| | - Lester Jeshua Smith
- Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana.,3D Bioprinting Core, Indiana University School of Medicine, Indianapolis, Indiana
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26
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Nycz CJ, Strobel HA, Suqui K, Grosha J, Fischer GS, Rolle MW. A Method for High-Throughput Robotic Assembly of Three-Dimensional Vascular Tissue. Tissue Eng Part A 2019; 25:1251-1260. [PMID: 30638142 DOI: 10.1089/ten.tea.2018.0288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
IMPACT STATEMENT Self-assembled tissues have potential to serve both as implantable grafts and as tools for disease modeling and drug screening. For these applications, tissue production must ultimately be scaled-up and automated. Limited technologies exist for precisely manipulating self-assembled tissues, which are fragile early in culture. Here, we presented a method for automatically stacking self-assembled smooth muscle cell rings onto mandrels, using a custom-designed well plate and robotic punch system. Rings then fuse into tissue-engineered blood vessels (TEBVs). This is a critical step toward automating TEBV production that may be applied to other tubular tissues as well.
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Affiliation(s)
- Christopher J Nycz
- Robotics Engineering Program, Worcester Polytechnic Institute, Worcester, Massachusetts
| | - Hannah A Strobel
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts
| | - Kathy Suqui
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts
| | - Jonian Grosha
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts
| | - Gregory S Fischer
- Robotics Engineering Program, Worcester Polytechnic Institute, Worcester, Massachusetts.,Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts.,Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts
| | - Marsha W Rolle
- Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts
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27
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Oberoi G, Nitsch S, Edelmayer M, Janjić K, Müller AS, Agis H. 3D Printing-Encompassing the Facets of Dentistry. Front Bioeng Biotechnol 2018; 6:172. [PMID: 30525032 PMCID: PMC6262086 DOI: 10.3389/fbioe.2018.00172] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 10/29/2018] [Indexed: 12/14/2022] Open
Abstract
This narrative review presents an overview on the currently available 3D printing technologies and their utilization in experimental, clinical and educational facets, from the perspective of different specialties of dentistry, including oral and maxillofacial surgery, orthodontics, endodontics, prosthodontics, and periodontics. It covers research and innovation, treatment modalities, education and training, employing the rapidly developing 3D printing process. Research-oriented advancement in 3D printing in dentistry is witnessed by the rising number of publications on this topic. Visualization of treatment outcomes makes it a promising clinical tool. Educational programs utilizing 3D-printed models stimulate training of dental skills in students and trainees. 3D printing has enormous potential to ameliorate oral health care in research, clinical treatment, and education in dentistry.
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Affiliation(s)
- Gunpreet Oberoi
- Department of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Vienna, Austria
| | - Sophie Nitsch
- Department of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Department of Health Sciences, FH Wien, University of Applied Sciences, Vienna, Austria
| | - Michael Edelmayer
- Austrian Cluster for Tissue Regeneration, Vienna, Austria.,Department of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Klara Janjić
- Department of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Anna Sonja Müller
- Department of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Hermann Agis
- Department of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Austrian Cluster for Tissue Regeneration, Vienna, Austria
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28
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Manning KL, Thomson AH, Morgan JR. Funnel-Guided Positioning of Multicellular Microtissues to Build Macrotissues. Tissue Eng Part C Methods 2018; 24:557-565. [PMID: 30105944 DOI: 10.1089/ten.tec.2018.0137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The field of tissue engineering is developing new additive manufacturing technologies to fabricate 3D living constructs for use as in vitro platforms for the testing of drugs and chemicals, or to restore lost function in vivo. In this article, we describe the funnel-guide (FG), a new additive manufacturing strategy for the noncontact manipulation and positioning of multicellular microtissues and we show that the FG can be used to build macrotissues layer by layer. We used agarose micromolds to self-assemble cells into toroid-shaped and honeycomb-shaped microtissues, and observed that when falling in cell culture medium, the microtissues spontaneously righted themselves to a horizontal orientation. We fabricated a funnel to guide these falling toroids and honeycombs into precise positions and stack them, wherein they fused to form tubular structures. We tested multiple cell types and toroid sizes, and ultimately used the FG to create a stack of 45 toroids that fused into a tube 5 mm long with an inner diameter of 600 μm. The FG is a new principle for the manipulation of microtissues and is a platform for the layer-by-layer positioning of microtissue building blocks to form macrotissues.
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Affiliation(s)
- Kali L Manning
- 1 Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University , Providence, Rhode Island.,2 Center for Biomedical Engineering, Brown University , Providence, Rhode Island
| | - Andrew H Thomson
- 1 Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University , Providence, Rhode Island
| | - Jeffrey R Morgan
- 1 Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University , Providence, Rhode Island.,2 Center for Biomedical Engineering, Brown University , Providence, Rhode Island
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29
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Ip BC, Cui F, Wilks BT, Murphy J, Tripathi A, Morgan JR. Perfused Organ Cell-Dense Macrotissues Assembled from Prefabricated Living Microtissues. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/adbi.201800076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Blanche C. Ip
- Department of Molecular Pharmacology, Physiology and Biotechnology; Brown University; Providence RI 02912 USA
- Center for Biomedical Engineering; Brown University; Providence RI 02912 USA
| | - Francis Cui
- Center for Biomedical Engineering; Brown University; Providence RI 02912 USA
- School of Engineering; Brown University; Providence RI 02912 USA
| | - Benjamin T. Wilks
- Department of Molecular Pharmacology, Physiology and Biotechnology; Brown University; Providence RI 02912 USA
- Center for Biomedical Engineering; Brown University; Providence RI 02912 USA
| | - John Murphy
- Department of Molecular Pharmacology, Physiology and Biotechnology; Brown University; Providence RI 02912 USA
| | - Anubhav Tripathi
- Center for Biomedical Engineering; Brown University; Providence RI 02912 USA
- School of Engineering; Brown University; Providence RI 02912 USA
| | - Jeffrey R. Morgan
- Department of Molecular Pharmacology, Physiology and Biotechnology; Brown University; Providence RI 02912 USA
- Center for Biomedical Engineering; Brown University; Providence RI 02912 USA
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30
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Lee JM, Sing SL, Zhou M, Yeong WY. 3D bioprinting processes: A perspective on classification and terminology. Int J Bioprint 2018; 4:151. [PMID: 33102923 PMCID: PMC7582007 DOI: 10.18063/ijb.v4i2.151] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/25/2018] [Indexed: 12/14/2022] Open
Abstract
This article aims to provide further classification of cell-compatible bioprinting processes and examine the concept of 3D bioprinting within the general technology field of 3D printing. These technologies are categorized into four distinct process categories, namely material jetting, vat photopolymerization, material extrusion and free-form spatial printing. Discussion will be presented on the definition of classification with example of techniques grouped under the same category. The objective of this article is to establish a basic framework for standardization of process terminology in order to accelerate the implementation of bioprinting technologies in research and commercial landscape.
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Affiliation(s)
- Jia Min Lee
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Swee Leong Sing
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Miaomiao Zhou
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
| | - Wai Yee Yeong
- Singapore Centre for 3D Printing, School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore
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31
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Cui FR, Ip BC, Morgan JR, Tripathi A. Hydrodynamics of the Bio-Gripper: A Fluid-Driven "Claw Machine" for Soft Microtissue Translocation. SLAS Technol 2018; 23:540-549. [PMID: 29932848 DOI: 10.1177/2472630318775079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Technological advances in solid organ tissue engineering that rely on the assembly of small tissue-building parts require a novel transport method suited for soft, deformable, living objects of submillimeter- to centimeter-length scale. We describe a technology that utilizes membrane flow through a gripper to generate optimized pressure differentials across the top and bottom surfaces of microtissue so that the part may be gripped and lifted. The flow and geometry parameters are developed for automation by analyzing the fluid mechanics framework by which a gripper can lift tissue parts off solid and porous surfaces. For the axisymmetric part and gripper geometries, we examine the lift force on the part as a function of various parameters related to the gripper design, its operation, and the tissue parts and environments with which it operates. We believe our bio-gripping model can be used in various applications in high-throughput tissue engineering.
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Affiliation(s)
- Francis R Cui
- 1 School of Engineering, Brown University, Providence, RI, USA.,2 Center for Biomedical Engineering, Brown University, Providence, RI, USA
| | - Blanche C Ip
- 2 Center for Biomedical Engineering, Brown University, Providence, RI, USA.,3 Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
| | - Jeffrey R Morgan
- 2 Center for Biomedical Engineering, Brown University, Providence, RI, USA.,3 Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, USA
| | - Anubhav Tripathi
- 1 School of Engineering, Brown University, Providence, RI, USA.,2 Center for Biomedical Engineering, Brown University, Providence, RI, USA
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32
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Challenges in Bio-fabrication of Organoid Cultures. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1107:53-71. [DOI: 10.1007/5584_2018_216] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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33
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FABRICA: A Bioreactor Platform for Printing, Perfusing, Observing, & Stimulating 3D Tissues. Sci Rep 2018; 8:7561. [PMID: 29765087 PMCID: PMC5953945 DOI: 10.1038/s41598-018-25663-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 04/17/2018] [Indexed: 12/11/2022] Open
Abstract
We are introducing the FABRICA, a bioprinter-agnostic 3D-printed bioreactor platform designed for 3D-bioprinted tissue construct culture, perfusion, observation, and analysis. The computer-designed FABRICA was 3D-printed with biocompatible material and used for two studies: (1) Flow Profile Study: perfused 5 different media through a synthetic 3D-bioprinted construct and ultrasonically analyzed the flow profile at increasing volumetric flow rates (VFR); (2) Construct Perfusion Study: perfused a 3D-bioprinted tissue construct for a week and compared histologically with a non-perfused control. For the flow profile study, construct VFR increased with increasing pump VFR. Water and other media increased VFR significantly while human and pig blood showed shallow increases. For the construct perfusion study, we confirmed more viable cells in perfused 3D-bioprinted tissue compared to control. The FABRICA can be used to visualize constructs during 3D-bioprinting, incubation, and to control and ultrasonically analyze perfusion, aseptically in real-time, making the FABRICA tunable for different tissues.
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34
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Kim TY, Kofron CM, King ME, Markes AR, Okundaye AO, Qu Z, Mende U, Choi BR. Directed fusion of cardiac spheroids into larger heterocellular microtissues enables investigation of cardiac action potential propagation via cardiac fibroblasts. PLoS One 2018; 13:e0196714. [PMID: 29715271 PMCID: PMC5929561 DOI: 10.1371/journal.pone.0196714] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/18/2018] [Indexed: 12/13/2022] Open
Abstract
Multicellular spheroids generated through cellular self-assembly provide cytoarchitectural complexities of native tissue including three-dimensionality, extensive cell-cell contacts, and appropriate cell-extracellular matrix interactions. They are increasingly suggested as building blocks for larger engineered tissues to achieve shapes, organization, heterogeneity, and other biomimetic complexities. Application of these tissue culture platforms is of particular importance in cardiac research as the myocardium is comprised of distinct but intermingled cell types. Here, we generated scaffold-free 3D cardiac microtissue spheroids comprised of cardiac myocytes (CMs) and/or cardiac fibroblasts (CFs) and used them as building blocks to form larger microtissues with different spatial distributions of CMs and CFs. Characterization of fusing homotypic and heterotypic spheroid pairs revealed an important influence of CFs on fusion kinetics, but most strikingly showed rapid fusion kinetics between heterotypic pairs consisting of one CF and one CM spheroid, indicating that CMs and CFs self-sort in vitro into the intermixed morphology found in the healthy myocardium. We then examined electrophysiological integration of fused homotypic and heterotypic microtissues by mapping action potential propagation. Heterocellular elongated microtissues which recapitulate the disproportionate CF spatial distribution seen in the infarcted myocardium showed that action potentials propagate through CF volumes albeit with significant delay. Complementary computational modeling revealed an important role of CF sodium currents and the spatial distribution of the CM-CF boundary in action potential conduction through CF volumes. Taken together, this study provides useful insights for the development of complex, heterocellular engineered 3D tissue constructs and their engraftment via tissue fusion and has implications for arrhythmogenesis in cardiac disease and repair.
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Affiliation(s)
- Tae Yun Kim
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
| | - Celinda M. Kofron
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
- Center for Biomedical Engineering, School of Engineering, Brown University, Providence, RI, United States of America
| | - Michelle E. King
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
| | - Alexander R. Markes
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
- Division of Biology and Medicine, Brown University, Providence, RI, United States of America
| | - Amenawon O. Okundaye
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI, United States of America
| | - Zhilin Qu
- Division of Cardiology, Department of Medicine, University of California, Los Angeles, CA, United States of America
| | - Ulrike Mende
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
| | - Bum-Rak Choi
- Cardiovascular Research Center, Cardiovascular Institute, Rhode Island Hospital and Alpert Medical School of Brown University, Providence, RI, United States of America
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35
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Gionet-Gonzales MA, Leach JK. Engineering principles for guiding spheroid function in the regeneration of bone, cartilage, and skin. Biomed Mater 2018; 13:034109. [PMID: 29460842 PMCID: PMC5898817 DOI: 10.1088/1748-605x/aab0b3] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
There is a critical need for strategies that effectively enhance cell viability and post-implantation performance in order to advance cell-based therapies. Spheroids, which are dense cellular aggregates, overcome many current limitations with transplanting individual cells. Compared to individual cells, the aggregation of cells into spheroids results in increased cell viability, together with enhanced proangiogenic, anti-inflammatory, and tissue-forming potential. Furthermore, the transplantation of cells using engineered materials enables localized delivery to the target site while providing an opportunity to guide cell fate in situ, resulting in improved therapeutic outcomes compared to systemic or localized injection. Despite promising early results achieved by freely injecting spheroids into damaged tissues, growing evidence demonstrates the advantages of entrapping spheroids within a biomaterial prior to implantation. This review will highlight the basic characteristics and qualities of spheroids, describe the underlying principles for how biomaterials influence spheroid behavior, with an emphasis on hydrogels, and provide examples of synergistic approaches using spheroids and biomaterials for tissue engineering applications.
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Affiliation(s)
| | - J. Kent Leach
- Department of Biomedical Engineering, University of California, Davis, Davis, CA 95616, USA
- Department of Orthopaedic Surgery, UC Davis Health, Sacramento, CA 95817, USA
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36
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Munarin F, Kaiser NJ, Kim TY, Choi BR, Coulombe KLK. Laser-Etched Designs for Molding Hydrogel-Based Engineered Tissues. Tissue Eng Part C Methods 2018; 23:311-321. [PMID: 28457187 DOI: 10.1089/ten.tec.2017.0068] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Rapid prototyping and fabrication of elastomeric molds for sterile culture of engineered tissues allow for the development of tissue geometries that can be tailored to different in vitro applications and customized as implantable scaffolds for regenerative medicine. Commercially available molds offer minimal capabilities for adaptation to unique conditions or applications versus those for which they are specifically designed. Here we describe a replica molding method for the design and fabrication of poly(dimethylsiloxane) (PDMS) molds from laser-etched acrylic negative masters with ∼0.2 mm resolution. Examples of the variety of mold shapes, sizes, and patterns obtained from laser-etched designs are provided. We use the patterned PDMS molds for producing and culturing engineered cardiac tissues with cardiomyocytes derived from human-induced pluripotent stem cells. We demonstrate that tight control over tissue morphology and anisotropy results in modulation of cell alignment and tissue-level conduction properties, including the appearance and elimination of reentrant arrhythmias, or circular electrical activation patterns. Techniques for handling engineered cardiac tissues during implantation in vivo in a rat model of myocardial infarction have been developed and are presented herein to facilitate development and adoption of surgical techniques for use with hydrogel-based engineered tissues. In summary, the method presented herein for engineered tissue mold generation is straightforward and low cost, enabling rapid design iteration and adaptation to a variety of applications in tissue engineering. Furthermore, the burden of equipment and expertise is low, allowing the technique to be accessible to all.
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Affiliation(s)
- Fabiola Munarin
- 1 School of Engineering, Brown University , Providence, Rhode Island
| | - Nicholas J Kaiser
- 1 School of Engineering, Brown University , Providence, Rhode Island
| | - Tae Yun Kim
- 2 Department of Medicine, Rhode Island Hospital and Alpert Medical School of Brown University , Providence, Rhode Island
| | - Bum-Rak Choi
- 2 Department of Medicine, Rhode Island Hospital and Alpert Medical School of Brown University , Providence, Rhode Island
| | - Kareen L K Coulombe
- 1 School of Engineering, Brown University , Providence, Rhode Island.,3 Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University , Providence, Rhode Island
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37
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Xu C, Bai Y, Yang S, Yang H, Stout DA, Tran PA, Yang L. A versatile three-dimensional foam fabrication strategy for soft and hard tissue engineering. Biomed Mater 2018; 13:025018. [DOI: 10.1088/1748-605x/aaa1f6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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38
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Spheroids as vascularization units: From angiogenesis research to tissue engineering applications. Biotechnol Adv 2017; 35:782-791. [DOI: 10.1016/j.biotechadv.2017.07.002] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 07/03/2017] [Accepted: 07/05/2017] [Indexed: 02/08/2023]
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39
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Murphy KC, Hung BP, Browne-Bourne S, Zhou D, Yeung J, Genetos DC, Leach JK. Measurement of oxygen tension within mesenchymal stem cell spheroids. J R Soc Interface 2017; 14:rsif.2016.0851. [PMID: 28179546 DOI: 10.1098/rsif.2016.0851] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/17/2017] [Indexed: 02/07/2023] Open
Abstract
Spheroids formed of mesenchymal stem cells (MSCs) exhibit increased cell survival and trophic factor secretion compared with dissociated MSCs, making them therapeutically advantageous for cell therapy. Presently, there is no consensus for the mechanism of action. Many hypothesize that spheroid formation potentiates cell function by generating a hypoxic core within spheroids of sufficiently large diameters. The purpose of this study was to experimentally determine whether a hypoxic core is generated in MSC spheroids by measuring oxygen tension in aggregates of increasing diameter and correlating oxygen tension values with cell function. MSC spheroids were formed with 15 000, 30 000 or 60 000 cells per spheroid, resulting in radii of 176 ± 8 µm, 251 ± 12 µm and 353 ± 18 µm, respectively. Oxygen tension values coupled with mathematical modelling revealed a gradient that varied less than 10% from the outer diameter within the largest spheroids. Despite the modest radial variance in oxygen tension, cellular metabolism from spheroids significantly decreased as the number of cells and resultant spheroid size increased. This may be due to adaptive reductions in matrix deposition and packing density with increases in spheroid diameter, enabling spheroids to avoid the formation of a hypoxic core. Overall, these data provide evidence that the enhanced function of MSC spheroids is not oxygen mediated.
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Affiliation(s)
- Kaitlin C Murphy
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Ben P Hung
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Stephen Browne-Bourne
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Dejie Zhou
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Jessica Yeung
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - Damian C Genetos
- Department of Anatomy, Physiology, and Cell Biology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - J Kent Leach
- Department of Biomedical Engineering, School of Veterinary Medicine, University of California, Davis, CA 95616, USA .,Department of Orthopaedic Surgery, School of Medicine, University of California, Davis, Sacramento, CA 95817, USA
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40
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Pinnock CB, Xu Z, Lam MT. Scaling of Engineered Vascular Grafts Using 3D Printed Guides and the Ring Stacking Method. J Vis Exp 2017. [PMID: 28447994 DOI: 10.3791/55322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Coronary artery disease remains a leading cause of death, affecting millions of Americans. With the lack of autologous vascular grafts available, engineered grafts offer great potential for patient treatment. However, engineered vascular grafts are generally not easily scalable, requiring manufacture of custom molds or polymer tubes in order to customize to different sizes, constituting a time-consuming and costly practice. Human arteries range in lumen diameter from about 2.0-38 mm and in wall thickness from about 0.5-2.5 mm. We have created a method, termed the "Ring Stacking Method," in which variable size rings of tissue of the desired cell type, demonstrated here with vascular smooth muscle cells (SMCs), can be created using guides of center posts to control lumen diameter and outer shells to dictate vessel wall thickness. These tissue rings are then stacked to create a tubular construct, mimicking the natural form of a blood vessel. The vessel length can be tailored by simply stacking the number of rings required to constitute the length needed. With our technique, tissues of tubular forms, similar to a blood vessel, can be readily manufactured in a variety of dimensions and lengths to meet the needs of the clinic and patient.
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Affiliation(s)
| | - Zhengfan Xu
- Department of Biomedical Engineering, Wayne State University
| | - Mai T Lam
- Department of Biomedical Engineering, Wayne State University; Cardiovascular Research Institute, Wayne State University;
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41
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Moldovan NI, Hibino N, Nakayama K. Principles of the Kenzan Method for Robotic Cell Spheroid-Based Three-Dimensional Bioprinting<sup/>. TISSUE ENGINEERING PART B-REVIEWS 2017; 23:237-244. [PMID: 27917703 DOI: 10.1089/ten.teb.2016.0322] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bioprinting is a technology with the prospect to change the way many diseases are treated, by replacing the damaged tissues with live de novo created biosimilar constructs. However, after more than a decade of incubation and many proofs of concept, the field is still in its infancy. The current stagnation is the consequence of its early success: the first bioprinters, and most of those that followed, were modified versions of the three-dimensional printers used in additive manufacturing, redesigned for layer-by-layer dispersion of biomaterials. In all variants (inkjet, microextrusion, or laser assisted), this approach is material ("scaffold") dependent and energy intensive, making it hardly compatible with some of the intended biological applications. Instead, the future of bioprinting may benefit from the use of gentler scaffold-free bioassembling methods. A substantial body of evidence has accumulated, indicating this is possible by use of preformed cell spheroids, which have been assembled in cartilage, bone, and cardiac muscle-like constructs. However, a commercial instrument capable to directly and precisely "print" spheroids has not been available until the invention of the microneedles-based ("Kenzan") spheroid assembling and the launching in Japan of a bioprinter based on this method. This robotic platform laces spheroids into predesigned contiguous structures with micron-level precision, using stainless steel microneedles ("kenzans") as temporary support. These constructs are further cultivated until the spheroids fuse into cellular aggregates and synthesize their own extracellular matrix, thus attaining the needed structural organization and robustness. This novel technology opens wide opportunities for bioengineering of tissues and organs.
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Affiliation(s)
- Nicanor I Moldovan
- 1 Department of Biomedical Engineering, Schools of Engineering and Medicine, Indiana University-Purdue University Indianapolis , Indianapolis, Indiana.,2 Department of Ophthalmology, Schools of Engineering and Medicine, Indiana University-Purdue University Indianapolis , Indianapolis, Indiana
| | - Narutoshi Hibino
- 3 Department of Surgery, Division of Cardiac Surgery, Johns Hopkins University , Baltimore, Maryland
| | - Koichi Nakayama
- 4 Department of Regenerative Medicine and Biomedical Engineering, Faculty of Medicine, Saga University , Japan
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4D Bioprinting for Biomedical Applications. Trends Biotechnol 2016; 34:746-756. [DOI: 10.1016/j.tibtech.2016.03.004] [Citation(s) in RCA: 394] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Revised: 03/13/2016] [Accepted: 03/15/2016] [Indexed: 11/23/2022]
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Ip BC, Cui F, Tripathi A, Morgan JR. The bio-gripper: a fluid-driven micro-manipulator of living tissue constructs for additive bio-manufacturing. Biofabrication 2016; 8:025015. [DOI: 10.1088/1758-5090/8/2/025015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schell JY, Wilks BT, Patel M, Franck C, Chalivendra V, Cao X, Shenoy VB, Morgan JR. Harnessing cellular-derived forces in self-assembled microtissues to control the synthesis and alignment of ECM. Biomaterials 2016; 77:120-9. [DOI: 10.1016/j.biomaterials.2015.10.080] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 10/30/2015] [Indexed: 01/25/2023]
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Yarygin KN, Lupatov AY, Kholodenko IV. Cell-based therapies of liver diseases: age-related challenges. Clin Interv Aging 2015; 10:1909-24. [PMID: 26664104 PMCID: PMC4671765 DOI: 10.2147/cia.s97926] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The scope of this review is to revise recent advances of the cell-based therapies of liver diseases with an emphasis on cell donor's and patient's age. Regenerative medicine with cell-based technologies as its integral part is focused on the structural and functional restoration of tissues impaired by sickness or aging. Unlike drug-based medicine directed primarily at alleviation of symptoms, regenerative medicine offers a more holistic approach to disease and senescence management aimed to achieve restoration of homeostasis. Hepatocyte transplantation and organ engineering are very probable forthcoming options of liver disease treatment in people of different ages and vigorous research and technological innovations in this area are in progress. Accordingly, availability of sufficient amounts of functional human hepatocytes is crucial. Direct isolation of autologous hepatocytes from liver biopsy is problematic due to related discomfort and difficulties with further expansion of cells, particularly those derived from aging people. Allogeneic primary human hepatocytes meeting quality standards are also in short supply. Alternatively, autologous hepatocytes can be produced by reprogramming of differentiated cells through the stage of induced pluripotent stem cells. In addition, fibroblasts and mesenchymal stromal cells can be directly induced to undergo advanced stage hepatogenic differentiation. Reprogramming of cells derived from elderly people is accompanied by the reversal of age-associated changes at the cellular level manifesting itself by telomere elongation and the U-turn of DNA methylation. Cell reprogramming can provide high quality rejuvenated hepatocytes for cell therapy and liver tissue engineering. Further technological advancements and establishment of national and global registries of induced pluripotent stem cell lines homozygous for HLA haplotypes can allow industry-style production of livers for immunosuppression-free transplantation.
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Affiliation(s)
| | - Alexei Y Lupatov
- Laboratory of Cell Biology, Institute of Biomedical Chemistry, Moscow, Russia
| | - Irina V Kholodenko
- Laboratory of Cell Biology, Institute of Biomedical Chemistry, Moscow, Russia
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Temenoff JS. Special Collection: Emerging Concepts in Three-Dimensional Microtissues. Tissue Eng Part A 2015; 22:3-4. [PMID: 26423620 DOI: 10.1089/ten.tea.2015.0446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Over the past decade, the concept of tissue engineering has been extended to include technologies that use multicellular aggregates, not only to repair or replace tissue but also as a stand-alone in vitro device (e.g., "organ-on-a-chip") with well-defined biological outputs. The advantage of such systems is that they allow for culture of one or more cell types in three dimensions, which may promote tissue function that is more mimetic of the in vivo state, while allowing high-throughput sample testing and a large degree of control of external culture factors that may lead to more reproducible results than that found in the more complex in vivo environment. While the means used to achieve these devices vary greatly, in this special collection, we focus our attention on formation and use of scaffold-free cellular aggregates (three-dimensional microtissues).
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Affiliation(s)
- Johnna S Temenoff
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University , Atlanta, Georgia
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Zhang B, Montgomery M, Davenport-Huyer L, Korolj A, Radisic M. Platform technology for scalable assembly of instantaneously functional mosaic tissues. SCIENCE ADVANCES 2015; 1:e1500423. [PMID: 26601234 PMCID: PMC4643798 DOI: 10.1126/sciadv.1500423] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 07/13/2015] [Indexed: 05/05/2023]
Abstract
Engineering mature tissues requires a guided assembly of cells into organized three-dimensional (3D) structures with multiple cell types. Guidance is usually achieved by microtopographical scaffold cues or by cell-gel compaction. The assembly of individual units into functional 3D tissues is often time-consuming, relying on cell ingrowth and matrix remodeling, whereas disassembly requires an invasive method that includes either matrix dissolution or mechanical cutting. We invented Tissue-Velcro, a bio-scaffold with a microfabricated hook and loop system. The assembly of Tissue-Velcro preserved the guided cell alignment realized by the topographical features in the 2D scaffold mesh and allowed for the instant establishment of coculture conditions by spatially defined stacking of cardiac cell layers or through endothelial cell coating. The assembled cardiac 3D tissue constructs were immediately functional as measured by their ability to contract in response to electrical field stimulation. Facile, on-demand tissue disassembly was demonstrated while preserving the structure, physical integrity, and beating function of individual layers.
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Affiliation(s)
- Boyang Zhang
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
| | - Miles Montgomery
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
| | - Locke Davenport-Huyer
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
| | - Anastasia Korolj
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
| | - Milica Radisic
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
- Corresponding author. E-mail:
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