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İyisan N, Hausdörfer O, Wang C, Hiendlmeier L, Harder P, Wolfrum B, Özkale B. Mechanoactivation of Single Stem Cells in Microgels Using a 3D-Printed Stimulation Device. SMALL METHODS 2024:e2400272. [PMID: 39011729 DOI: 10.1002/smtd.202400272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 07/03/2024] [Indexed: 07/17/2024]
Abstract
In this study, the novel 3D-printed pressure chamber for encapsulated single-cell stimulation (3D-PRESS) platform is introduced for the mechanical stimulation of single stem cells in 3D microgels. The custom-designed 3D-PRESS, allows precise pressure application up to 400 kPa at the single-cell level. Microfluidics is employed to encapsulate single mesenchymal stem cells within ionically cross-linked alginate microgels with cell adhesion RGD peptides. Rigorous testing affirms the leak-proof performance of the 3D-PRESS device up to 400 kPa, which is fully biocompatible. 3D-PRESS is implemented on mesenchymal stem cells for mechanotransduction studies, by specifically targeting intracellular calcium signaling and the nuclear translocation of a mechanically sensitive transcription factor. Applying 200 kPa pressure on individually encapsulated stem cells reveals heightened calcium signaling in 3D microgels compared to conventional 2D culture. Similarly, Yes-associated protein (YAP) translocation into the nucleus occurs at 200 kPa in 3D microgels with cell-binding RGD peptides unveiling the involvement of integrin-mediated mechanotransduction in singly encapsulated stem cells in 3D microgels. Combining live-cell imaging with precise mechanical control, the 3D-PRESS platform emerges as a versatile tool for exploring cellular responses to pressure stimuli, applicable to various cell types, providing novel insights into single-cell mechanobiology.
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Affiliation(s)
- Nergishan İyisan
- Microrobotic Bioengineering Lab (MRBL), School of Computation, Information, and Technology, Department of Electrical Engineering, Technical University of Munich (TUM), Hans-Piloty-Straße 1, 85748, Garching, Germany
- Munich Institute of Robotics and Machine Intelligence, Technical University of Munich, Georg-Brauchle-Ring 60, 80992, München, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
| | - Oliver Hausdörfer
- Microrobotic Bioengineering Lab (MRBL), School of Computation, Information, and Technology, Department of Electrical Engineering, Technical University of Munich (TUM), Hans-Piloty-Straße 1, 85748, Garching, Germany
| | - Chen Wang
- Microrobotic Bioengineering Lab (MRBL), School of Computation, Information, and Technology, Department of Electrical Engineering, Technical University of Munich (TUM), Hans-Piloty-Straße 1, 85748, Garching, Germany
- Munich Institute of Robotics and Machine Intelligence, Technical University of Munich, Georg-Brauchle-Ring 60, 80992, München, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
| | - Lukas Hiendlmeier
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
- Neuroelectronics, School of Computation, Information, and Technology, Department of Electrical Engineering, Department of Electrical Engineering, Technical University of Munich (TUM), 85748, Garching, Germany
| | - Philipp Harder
- Microrobotic Bioengineering Lab (MRBL), School of Computation, Information, and Technology, Department of Electrical Engineering, Technical University of Munich (TUM), Hans-Piloty-Straße 1, 85748, Garching, Germany
- Munich Institute of Robotics and Machine Intelligence, Technical University of Munich, Georg-Brauchle-Ring 60, 80992, München, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
| | - Bernhard Wolfrum
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
- Neuroelectronics, School of Computation, Information, and Technology, Department of Electrical Engineering, Department of Electrical Engineering, Technical University of Munich (TUM), 85748, Garching, Germany
| | - Berna Özkale
- Microrobotic Bioengineering Lab (MRBL), School of Computation, Information, and Technology, Department of Electrical Engineering, Technical University of Munich (TUM), Hans-Piloty-Straße 1, 85748, Garching, Germany
- Munich Institute of Robotics and Machine Intelligence, Technical University of Munich, Georg-Brauchle-Ring 60, 80992, München, Germany
- Munich Institute of Biomedical Engineering, Technical University of Munich, Boltzmannstraße 11, 85748, Garching, Germany
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Zimmerling A, Zhou Y, Chen X. Synthesis of Alginate/Collagen Bioink for Bioprinting Respiratory Tissue Models. J Funct Biomater 2024; 15:90. [PMID: 38667547 PMCID: PMC11050917 DOI: 10.3390/jfb15040090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 03/17/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024] Open
Abstract
Synthesis of bioinks for bioprinting of respiratory tissue requires considerations related to immunogenicity, mechanical properties, printability, and cellular compatibility. Biomaterials can be tailored to provide the appropriate combination of these properties through the synergy of materials with individual pros and cons. Sodium alginate, a water-soluble polymer derived from seaweed, is a cheap yet printable biomaterial with good structural properties; however, it lacks physiological relevance and cell binding sites. Collagen, a common component in the extra cellular matrix of many tissues, is expensive and lacks printability; however, it is highly biocompatible and exhibits sites for cellular binding. This paper presents our study on the synthesis of bioinks from alginate and collagen for use in bioprinting respiratory tissue models. Bioinks were synthesized from 40 mg/mL (4%) alginate and 3 mg/mL (0.3%) collagen in varying ratios (1:0, 4:1, 3:1, 2:1, and 1:1); then examined in terms of rheological properties, printability, compressive, and tensile properties and cellular compatibility. The results illustrate that the ratio of alginate to collagen has a profound impact on bioink performance and that, among the examined ratios, the 3:1 ratio is the most appropriate for use in bioprinting respiratory tissue scaffolds.
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Affiliation(s)
- Amanda Zimmerling
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK S7N 5A9, Canada
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada;
| | - Yan Zhou
- Vaccine and Infectious Disease Organization (VIDO), University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada;
| | - Xiongbiao Chen
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, 57 Campus Dr., Saskatoon, SK S7N 5A9, Canada
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, SK S7N 5A9, Canada
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3
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Zheng Y, Pan C, Xu P, Liu K. Hydrogel-mediated extracellular vesicles for enhanced wound healing: the latest progress, and their prospects for 3D bioprinting. J Nanobiotechnology 2024; 22:57. [PMID: 38341585 PMCID: PMC10858484 DOI: 10.1186/s12951-024-02315-9] [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: 11/06/2023] [Accepted: 01/26/2024] [Indexed: 02/12/2024] Open
Abstract
Extracellular vesicles have shown promising tissue recovery-promoting effects, making them increasingly sought-after for their therapeutic potential in wound treatment. However, traditional extracellular vesicle applications suffer from limitations such as rapid degradation and short maintenance during wound administration. To address these challenges, a growing body of research highlights the role of hydrogels as effective carriers for sustained extracellular vesicle release, thereby facilitating wound healing. The combination of extracellular vesicles with hydrogels and the development of 3D bioprinting create composite hydrogel systems boasting excellent mechanical properties and biological activity, presenting a novel approach to wound healing and skin dressing. This comprehensive review explores the remarkable mechanical properties of hydrogels, specifically suited for loading extracellular vesicles. We delve into the diverse sources of extracellular vesicles and hydrogels, analyzing their integration within composite hydrogel formulations for wound treatment. Different composite methods as well as 3D bioprinting, adapted to varying conditions and construction strategies, are examined for their roles in promoting wound healing. The results highlight the potential of extracellular vesicle-laden hydrogels as advanced therapeutic tools in the field of wound treatment, offering both mechanical support and bioactive functions. By providing an in-depth examination of the various roles that these composite hydrogels can play in wound healing, this review sheds light on the promising directions for further research and development. Finally, we address the challenges associated with the application of composite hydrogels, along with emerging trends of 3D bioprinting in this domain. The discussion covers issues such as scalability, regulatory considerations, and the translation of this technology into practical clinical settings. In conclusion, this review underlines the significant contributions of hydrogel-mediated extracellular vesicle therapy to the field of 3D bioprinting and wound healing and tissue regeneration. It serves as a valuable resource for researchers and practitioners alike, fostering a deeper understanding of the potential benefits, applications, and challenges involved in utilizing composite hydrogels for wound treatment.
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Affiliation(s)
- Yi Zheng
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Chuqiao Pan
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China
| | - Peng Xu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China.
| | - Kai Liu
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China.
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Chen X, Fazel Anvari-Yazdi A, Duan X, Zimmerling A, Gharraei R, Sharma N, Sweilem S, Ning L. Biomaterials / bioinks and extrusion bioprinting. Bioact Mater 2023; 28:511-536. [PMID: 37435177 PMCID: PMC10331419 DOI: 10.1016/j.bioactmat.2023.06.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/19/2023] [Accepted: 06/08/2023] [Indexed: 07/13/2023] Open
Abstract
Bioinks are formulations of biomaterials and living cells, sometimes with growth factors or other biomolecules, while extrusion bioprinting is an emerging technique to apply or deposit these bioinks or biomaterial solutions to create three-dimensional (3D) constructs with architectures and mechanical/biological properties that mimic those of native human tissue or organs. Printed constructs have found wide applications in tissue engineering for repairing or treating tissue/organ injuries, as well as in vitro tissue modelling for testing or validating newly developed therapeutics and vaccines prior to their use in humans. Successful printing of constructs and their subsequent applications rely on the properties of the formulated bioinks, including the rheological, mechanical, and biological properties, as well as the printing process. This article critically reviews the latest developments in bioinks and biomaterial solutions for extrusion bioprinting, focusing on bioink synthesis and characterization, as well as the influence of bioink properties on the printing process. Key issues and challenges are also discussed along with recommendations for future research.
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Affiliation(s)
- X.B. Chen
- Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Dr, S7K 5A9, Saskatoon, Canada
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Dr, Saskatoon, S7K 5A9, Canada
| | - A. Fazel Anvari-Yazdi
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Dr, Saskatoon, S7K 5A9, Canada
| | - X. Duan
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Dr, Saskatoon, S7K 5A9, Canada
| | - A. Zimmerling
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Dr, Saskatoon, S7K 5A9, Canada
| | - R. Gharraei
- Division of Biomedical Engineering, University of Saskatchewan, 57 Campus Dr, Saskatoon, S7K 5A9, Canada
| | - N.K. Sharma
- Department of Mechanical Engineering, University of Saskatchewan, 57 Campus Dr, S7K 5A9, Saskatoon, Canada
| | - S. Sweilem
- Department of Mechanical Engineering, Cleveland State University, Cleveland, OH, 44115, USA
| | - L. Ning
- Department of Mechanical Engineering, Cleveland State University, Cleveland, OH, 44115, USA
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5
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Yi S, Liu Q, Luo Z, He JJ, Ma HL, Li W, Wang D, Zhou C, Garciamendez CE, Hou L, Zhang J, Zhang YS. Micropore-Forming Gelatin Methacryloyl (GelMA) Bioink Toolbox 2.0: Designable Tunability and Adaptability for 3D Bioprinting Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106357. [PMID: 35607752 DOI: 10.1002/smll.202106357] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/25/2022] [Indexed: 06/15/2023]
Abstract
It is well-known that tissue engineering scaffolds that feature highly interconnected and size-adjustable micropores are oftentimes desired to promote cellular viability, motility, and functions. Unfortunately, the ability of precise control over the microporous structures within bioinks in a cytocompatible manner for applications in 3D bioprinting is generally lacking, until a method of micropore-forming bioink based on gelatin methacryloyl (GelMA) was reported recently. This bioink took advantage of the unique aqueous two-phase emulsion (ATPE) system, where poly(ethylene oxide) (PEO) droplets are utilized as the porogen. Considering the limitations associated with this very initial demonstration, this article has furthered the understanding of the micropore-forming GelMA bioinks by conducting a systematic investigation into the additional GelMA types (porcine and fish, different methacryloyl-modification degrees) and porogen types (PEO, poly(vinyl alcohol), and dextran), as well as the effects of the porogen concentrations and molecular weights on the properties of the GelMA-based ATPE bioink system. This article exemplifies not only the significantly wider range of micropore sizes achievable and better emulsion stability, but also the improved suitability for both extrusion and digital light processing bioprinting with favorable cellular responses.
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Affiliation(s)
- Sili Yi
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Qiong Liu
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Zeyu Luo
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Jacqueline Jialu He
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Hui-Lin Ma
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Wanlu Li
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Di Wang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Cuiping Zhou
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Carlos Ezio Garciamendez
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Linxi Hou
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Jin Zhang
- College of Chemical Engineering, Fuzhou University, Fuzhou, 350108, P. R. China
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
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Jahn P, Karger RK, Soso Khalaf S, Hamad S, Peinkofer G, Sahito RGA, Pieroth S, Nitsche F, Lu J, Derichsweiler D, Brockmeier K, Hescheler J, Schmidt A, Pfannkuche KP. Engineering of cardiac microtissues by microfluidic cell encapsulation in thermoshrinking non-crosslinked PNIPAAm gels. Biofabrication 2022; 14. [PMID: 35617928 DOI: 10.1088/1758-5090/ac73b5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 05/26/2022] [Indexed: 11/11/2022]
Abstract
Multicellular agglomerates in form of irregularly shaped or spherical clusters can recapitulate cell-cell interactions and are referred to as microtissues. Microtissues gain increasing attention in several fields including cardiovascular research. Cardiac microtissues are evolving as excellent model systems for drug testing in vitro (organ-on-a-chip), are used as tissue bricks in 3D printing processes and pave the way for improved cell replacement therapies in vivo. Microtissues are formed for example in hanging drop culture or specialized microwell plates; truly scalable methods are not yet available. In this study, a novel method of encapsulation of cells in Poly-N-isopropylacrylamid (PNIPAAm) spheres is introduced. Murine induced pluripotent stem cell-derived cardiomyocytes (CMs) and bone marrow-derived mesenchymal stem cells (MSCs) were encapsulated in PNIPAAm by raising the temperature of droplets formed in a microfluidics setup above the lower critical solute temperature (LCST) of 32°C. PNIPAAM precipitates to a water-insoluble physically linked gel above the LCST and shrinks by the expulsion of water, thereby trapping the cells in a collapsing polymer network and increasing the cell density by one order of magnitude. Within 24 hours, stable cardiac microtissues were first formed and later released from their polymer shell by washout of PNIPAAm at temperatures below the LCST. Rhythmically contracting microtissues showed homogenous cell distribution, age-dependent sarcomere organizations and action potential generation. The novel approach is applicable for microtissue formation from various cell types and can be implemented into scalable workflows.
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Affiliation(s)
- Philipp Jahn
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50924, GERMANY
| | - Rebecca Katharina Karger
- Center for Physiology and Pathophysiology, University of Cologne, Robert Koch Str. 39, Cologne, Nordrhein-Westfalen, 50931, GERMANY
| | - Shahab Soso Khalaf
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
| | - Sarkawt Hamad
- University of Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
| | - Gabriel Peinkofer
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
| | | | - Stephanie Pieroth
- Department of Chemistry, University of Cologne, Greinstr. 4-6, Koln, 50923, GERMANY
| | - Frank Nitsche
- Institute of Zoology, University of Cologne, Zülpicher Str. 47b, Cologne, Nordrhein-Westfalen, 50674, GERMANY
| | - Junqi Lu
- Department of Chemistry, University of Cologne, Greinstraße 4-6, Cologne, Nordrhein-Westfalen, 50939, GERMANY
| | - Daniel Derichsweiler
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
| | - Konrad Brockmeier
- Department of Pediatric Cardiology, University Hospital of Cologne, Kerpener Str. 62, Cologne, 50924, GERMANY
| | - Jürgen Hescheler
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
| | - Annette Schmidt
- Department Chemistry, University of Cologne, Greinstr. 4-6, Koln, Nordrhein-Westfalen, 50923, GERMANY
| | - Kurt Paul Pfannkuche
- University Hospital Cologne, Robert Koch Str. 39, Koln, Nordrhein-Westfalen, 50931, GERMANY
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Li L, Li J, Zou Q, Zuo Y, Lin L, Cai B, Li Y. Lotus root and osteons-inspired channel structural scaffold mediate cell biomineralization and vascularized bone tissue regeneration. J Biomed Mater Res B Appl Biomater 2021; 110:1178-1191. [PMID: 34905286 DOI: 10.1002/jbm.b.34991] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 11/19/2021] [Accepted: 12/05/2021] [Indexed: 11/05/2022]
Abstract
The interconnectivity of porous scaffold is vital for cell and tissue infiltration, and vascular networks formation, determining the successful bone regeneration in large bone defects. Here, inspired by the lotus-root and Haversian system of natural bone, a nano-hydroxyapatite/polyurethane (n-HA/PU) lotus root-like scaffold inlaid with micro holes on the wall of the adjacent channel was utilized to mediate cell biomineralization and vascularized bone tissue regeneration. Such a particular lotus-type structure remarkably promoted cells to proliferate and infiltrate into the center of the entire scaffold, serving as a clue to account for regulating cell alignment and differentiation physically. In vitro studies suggested that apatite accumulated dramatically on the channel wall in the lotus-type scaffold, probably promoting specific osteogenic differentiation of cells by the orientated channels, even in the absence of osteogenic factors. In vivo creation of critical bone defects (15-mm segments) was done in the radius of rabbits and implanted with the scaffold of different geometry to assess the structural parameters on the efficacy of new bone regeneration. The more extensive positive staining of BMP-2, more considerable amount of infiltrated capillary, more robust new bone formation, particularly the biomechanical strength of lotus-type scaffold group could reach the level of the control group without surgery, indicating that the lotus-type scaffold was more favorable for new bone tissue formation along tube-like channels. These results highlighted the potential of this biomimetic scaffold for cell and tissue infiltration and thus repair large bony defects.
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Affiliation(s)
- Limei Li
- Yunnan Key Laboratory of Stem Cell and Regenerative Medicine, Science and Technology Achievement Incubation Center, Kunming Medical University, Kunming, China
| | - Jidong Li
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Qin Zou
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yi Zuo
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Lili Lin
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Bin Cai
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu, China
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8
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Liu Y, Wang X, Hu F, Rausch-Fan X, Steinberg T, Lan Z, Zhang X. The effect of modifying the nanostructure of gelatin fiber scaffolds on early angiogenesis in vitroand in vivo. Biomed Mater 2021; 17. [PMID: 34808608 DOI: 10.1088/1748-605x/ac3c3c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 11/22/2021] [Indexed: 01/01/2023]
Abstract
Early angiogenesis is one of the key challenges in tissue regeneration. Crosslinking mode and fiber diameter are critical factors to affect the adhesion and proliferation of cells. However, whether and how these two factors affect early angiogenesis remain largely unknown. To address the issue, the optimal crosslinking mode and fiber diameter of gelatin fiber membrane for early angiogenesisin vivoandin vitrowere explored in this work. Compared with the post crosslinked gelatin fiber membrane with the same fiber diameter, the 700 nm diameterin situcrosslinked gelatin fiber membrane was found to have smaller roughness (230.67 ± 19 nm) and stronger hydrophilicity (54.77° ± 1.2°), which were suitable for cell growth and adhesion. Moreover, thein situcrosslinked gelatin fiber membrane with a fiber diameter of 1000 nm had significant advantages in early angiogenesis over the two with fiber diameters of 500 and 700 nm by up-regulating the expression of Ang1, VEGF, and integrin-β1. Our findings indicated that thein situcrosslinked gelatin fiber membrane with a diameter of 1000 nm might solve the problem of insufficient blood supply in the early stage of soft tissue regeneration and has broad clinical application prospects in promoting tissue regeneration.
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Affiliation(s)
- Yanyi Liu
- Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong 510280, People's Republic of China.,Shenzhen Stomatological Hospital, Southern Medical University, Shenzhen, Guangdong 518001, People's Republic of China
| | - Xiaoxue Wang
- Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Foshan, Guangdong 528308, People's Republic of China
| | - Fei Hu
- Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong 510280, People's Republic of China
| | - Xiaohui Rausch-Fan
- Division of Conservative Dentistry, Periodontology and Prophylaxis, Clinic Research Center, Dental Clinic, Medical University of Vienna, Vienna, Austria
| | - Thorsten Steinberg
- Division of Oral Biotechnology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Zedong Lan
- Shenzhen Stomatological Hospital, Southern Medical University, Shenzhen, Guangdong 518001, People's Republic of China
| | - Xueyang Zhang
- Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong 510280, People's Republic of China.,Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde, Foshan), Foshan, Guangdong 528308, People's Republic of China
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Possible Treatment of Myocardial Infarct Based on Tissue Engineering Using a Cellularized Solid Collagen Scaffold Functionalized with Arg-Glyc-Asp (RGD) Peptide. Int J Mol Sci 2021; 22:ijms222212563. [PMID: 34830447 PMCID: PMC8620820 DOI: 10.3390/ijms222212563] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/23/2021] [Accepted: 11/15/2021] [Indexed: 12/13/2022] Open
Abstract
Currently, the clinical impact of cell therapy after a myocardial infarction (MI) is limited by low cell engraftment due to low cell retention, cell death in inflammatory and poor angiogenic infarcted areas, secondary migration. Cells interact with their microenvironment through integrin mechanoreceptors that control their survival/apoptosis/differentiation/migration and proliferation. The association of cells with a three-dimensional material may be a way to improve interactions with their integrins, and thus outcomes, especially if preparations are epicardially applied. In this review, we will focus on the rationale for using collagen as a polymer backbone for tissue engineering of a contractile tissue. Contractilities are reported for natural but not synthetic polymers and for naturals only for: collagen/gelatin/decellularized-tissue/fibrin/Matrigel™ and for different material states: hydrogels/gels/solids. To achieve a thick/long-term contractile tissue and for cell transfer, solid porous compliant scaffolds are superior to hydrogels or gels. Classical methods to produce solid scaffolds: electrospinning/freeze-drying/3D-printing/solvent-casting and methods to reinforce and/or maintain scaffold properties by reticulations are reported. We also highlight the possibility of improving integrin interaction between cells and their associated collagen by its functionalizing with the RGD-peptide. Using a contractile patch that can be applied epicardially may be a way of improving ventricular remodeling and limiting secondary cell migration.
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Banerjee S, Szepes M, Dibbert N, Rios-Camacho JC, Kirschning A, Gruh I, Dräger G. Dextran-based scaffolds for in-situ hydrogelation: Use for next generation of bioartificial cardiac tissues. Carbohydr Polym 2021; 262:117924. [PMID: 33838803 DOI: 10.1016/j.carbpol.2021.117924] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 02/13/2021] [Accepted: 03/05/2021] [Indexed: 10/21/2022]
Abstract
In pursuit of a chemically-defined matrix for in vitro cardiac tissue generation, we present dextran (Dex)-derived hydrogels as matrices suitable for bioartificial cardiac tissues (BCT). The dextran hydrogels were generated in situ by using hydrazone formation as the crosslinking reaction. Material properties were flexibly adjusted, by varying the degrees of derivatization and the molecular weight of dextran used. Furthermore, to modulate dextran's bioactivity, cyclic pentapeptide RGD was coupled to its backbone. BCTs were generated by using a blend of modified dextran and human collagen (hColI) in combination with induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) and fibroblasts. These hColI + Dex blends with or without RGD supported tissue formation and functional maturation of CMs. Contraction forces (hColI + Dex-RGD: 0.27 ± 0.02 mN; hColI + Dex: 0.26 ± 0.01 mN) and frequencies were comparable to published constructs. Thus, we could demonstrate that, independent of the presence of RGD, our covalently linked dextran hydrogels are a promising matrix for building cardiac grafts.
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Affiliation(s)
- Samhita Banerjee
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Monika Szepes
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Nick Dibbert
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Julio-Cesar Rios-Camacho
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Andreas Kirschning
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1B, 30167 Hannover, Germany
| | - Ina Gruh
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Leibniz Research Laboratories for Biotechnology and Artificial Organs (LEBAO), Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Gerald Dräger
- Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 1B, 30167 Hannover, Germany.
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11
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He L, Chen X. Cardiomyocyte Induction and Regeneration for Myocardial Infarction Treatment: Cell Sources and Administration Strategies. Adv Healthc Mater 2020; 9:e2001175. [PMID: 33000909 DOI: 10.1002/adhm.202001175] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/15/2020] [Indexed: 02/06/2023]
Abstract
Occlusion of coronary artery and subsequent damage or death of myocardium can lead to myocardial infarction (MI) and even heart failure-one of the leading causes of deaths world wide. Notably, myocardium has extremely limited regeneration potential due to the loss or death of cardiomyocytes (i.e., the cells of which the myocardium is comprised) upon MI. A variety of stem cells and stem cell-derived cardiovascular cells, in situ cardiac fibroblasts and endogenous proliferative epicardium, have been exploited to provide renewable cellular sources to treat injured myocardium. Also, different strategies, including direct injection of cell suspensions, bioactive molecules, or cell-incorporated biomaterials, and implantation of artificial cardiac scaffolds (e.g., cell sheets and cardiac patches), have been developed to deliver renewable cells and/or bioactive molecules to the MI site for the myocardium regeneration. This article briefly surveys cell sources and delivery strategies, along with biomaterials and their processing techniques, developed for MI treatment. Key issues and challenges, as well as recommendations for future research, are also discussed.
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Affiliation(s)
- Lihong He
- Department of Cell Biology Medical College of Soochow University Suzhou 215123 China
| | - Xiongbiao Chen
- Department of Mechanical Engineering Division of Biomedical Engineering University of Saskatchewan Saskatoon S7N5A9 Canada
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12
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Kupikowska-Stobba B, Lewińska D. Polymer microcapsules and microbeads as cell carriers for in vivo biomedical applications. Biomater Sci 2020; 8:1536-1574. [PMID: 32110789 DOI: 10.1039/c9bm01337g] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polymer microcarriers are being extensively explored as cell delivery vehicles in cell-based therapies and hybrid tissue and organ engineering. Spherical microcarriers are of particular interest due to easy fabrication and injectability. They include microbeads, composed of a porous matrix, and microcapsules, where matrix core is additionally covered with a semipermeable membrane. Microcarriers provide cell containment at implantation site and protect the cells from host immunoresponse, degradation and shear stress. Immobilized cells may be genetically altered to release a specific therapeutic product directly at the target site, eliminating side effects of systemic therapies. Cell microcarriers need to fulfil a number of extremely high standards regarding their biocompatibility, cytocompatibility, immunoisolating capacity, transport, mechanical and chemical properties. To obtain cell microcarriers of specified parameters, a wide variety of polymers, both natural and synthetic, and immobilization methods can be applied. Yet so far, only a few approaches based on cell-laden microcarriers have reached clinical trials. The main issue that still impedes progress of these systems towards clinical application is limited cell survival in vivo. Herein, we review polymer biomaterials and methods used for fabrication of cell microcarriers for in vivo biomedical applications. We describe their key limitations and modifications aiming at improvement of microcarrier in vivo performance. We also present the main applications of polymer cell microcarriers in regenerative medicine, pancreatic islet and hepatocyte transplantation and in the treatment of cancer. Lastly, we outline the main challenges in cell microimmobilization for biomedical purposes, the strategies to overcome these issues and potential future improvements in this area.
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Affiliation(s)
- Barbara Kupikowska-Stobba
- Laboratory of Electrostatic Methods of Bioencapsulation, Department of Biomaterials and Biotechnological Systems, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Trojdena 4, 02-109 Warsaw, Poland.
| | - Dorota Lewińska
- Laboratory of Electrostatic Methods of Bioencapsulation, Department of Biomaterials and Biotechnological Systems, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Trojdena 4, 02-109 Warsaw, Poland.
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13
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14
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Kim SM, Lee MS, Jeon J, Lee DH, Yang K, Cho S, Han I, Yang HS. Biodegradable Nerve Guidance Conduit with Microporous and Micropatterned Poly(lactic‐
co
‐glycolic acid)‐Accelerated Sciatic Nerve Regeneration. Macromol Biosci 2018; 18:e1800290. [DOI: 10.1002/mabi.201800290] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 09/21/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Seong Min Kim
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 330–714 Republic of Korea
| | - Min Suk Lee
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 330–714 Republic of Korea
| | - Jin Jeon
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 330–714 Republic of Korea
| | - Dong Hyun Lee
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 330–714 Republic of Korea
| | - Kisuk Yang
- Department of BiotechnologyYonsei University Seoul 120–749 Republic of Korea
| | - Seung‐Woo Cho
- Department of BiotechnologyYonsei University Seoul 120–749 Republic of Korea
| | - Inbo Han
- Department of NeurosurgeryCHA Bundang Medical CenterCHA University Seongnam 13496 Republic of Korea
| | - Hee Seok Yang
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative MedicineDankook University Cheonan 330–714 Republic of Korea
- Department of Pharmaceutical EngineeringDankook University Cheonan 330–714 Republic of Korea
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15
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Rosellini E, Zhang YS, Migliori B, Barbani N, Lazzeri L, Shin SR, Dokmeci MR, Cascone MG. Protein/polysaccharide-based scaffolds mimicking native extracellular matrix for cardiac tissue engineering applications. J Biomed Mater Res A 2018; 106:769-781. [PMID: 29052369 PMCID: PMC5845858 DOI: 10.1002/jbm.a.36272] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 09/22/2017] [Accepted: 10/12/2017] [Indexed: 11/07/2022]
Abstract
Tissue engineering has emerged as a viable approach to treat disease or repair damage in tissues and organs. One of the key elements for the success of tissue engineering is the use of a scaffold serving as artificial extracellular matrix (ECM). The ECM hosts the cells and improves their survival, proliferation, and differentiation, enabling the formation of new tissue. Here, we propose the development of a class of protein/polysaccharide-based porous scaffolds for use as ECM substitutes in cardiac tissue engineering. Scaffolds based on blends of a protein component, collagen or gelatin, with a polysaccharide component, alginate, were produced by freeze-drying and subsequent ionic and chemical crosslinking. Their morphological, physicochemical, and mechanical properties were determined and compared with those of natural porcine myocardium. We demonstrated that our scaffolds possessed highly porous and interconnected structures, and the chemical homogeneity of the natural ECM was well reproduced in both types of scaffolds. Furthermore, the alginate/gelatin (AG) scaffolds better mimicked the native tissue in terms of interactions between components and protein secondary structure, and in terms of swelling behavior. The AG scaffolds also showed superior mechanical properties for the desired application and supported better adhesion, growth, and differentiation of myoblasts under static conditions. The AG scaffolds were subsequently used for culturing neonatal rat cardiomyocytes, where high viability of the resulting cardiac constructs was observed under dynamic flow culture in a microfluidic bioreactor. We therefore propose our protein/polysaccharide scaffolds as a viable ECM substitute for applications in cardiac tissue engineering. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 769-781, 2018.
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Affiliation(s)
- Elisabetta Rosellini
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, Pisa, 56126, Italy
| | - Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02139
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, 02139
| | - Bianca Migliori
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02139
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, 02139
| | - Niccoletta Barbani
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, Pisa, 56126, Italy
| | - Luigi Lazzeri
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, Pisa, 56126, Italy
| | - Su Ryon Shin
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02139
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, 02139
| | - Mehmet Remzi Dokmeci
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02139
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, 02139
| | - Maria Grazia Cascone
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, Pisa, 56126, Italy
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Hidalgo San Jose L, Stephens P, Song B, Barrow D. Microfluidic Encapsulation Supports Stem Cell Viability, Proliferation, and Neuronal Differentiation. Tissue Eng Part C Methods 2018; 24:158-170. [PMID: 29258387 PMCID: PMC5865257 DOI: 10.1089/ten.tec.2017.0368] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Stem cell encapsulation technology demonstrates much promise for the replacement of damaged tissue in several diseases, including spinal cord injury (SCI). The use of biocompatible microcapsules permits the control of stem cell fate in situ to facilitate the replacement of damaged/lost tissue. In this work, a novel customized microfluidic device was developed for the reproducible encapsulation of neural stem cells (NSCs) and dental pulp stem cells (DPSCs) within monodisperse, alginate-collagen microcapsules. Both cell types survived within the microcapsules for up to 21 days in culture. Stem cells demonstrated retention of their multipotency and neuronal differentiation properties upon selective release from the microcapsules, as demonstrated by high proliferation rates and the production of stem cell and neuronal lineage markers. When cell-laden microcapsules were transplanted into an organotypic SCI model, the microcapsules effectively retained the transplanted stem cells at the site of implantation. Implanted cells survived over a 10 day period in culture after transplantation and demonstrated commitment to a neural lineage. Our device provides a quick, effective, and aseptic method for the encapsulation of two different stem cell types (DPSCs and NSCs) within alginate-collagen microcapsules. Since stem cells were able to retain their viability and neural differentiation capacity within such microcapsules, this method provides a useful technique to study stem cell behavior within three-dimensional environments.
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Affiliation(s)
- Lorena Hidalgo San Jose
- 1 Biomedical Engineering Research Group, Cardiff School of Engineering, Cardiff University , Cardiff, United Kingdom .,2 Wound Biology Group, School of Dentistry, Cardiff Institute of Tissue Engineering and Repair, Cardiff University , Cardiff, United Kingdom
| | - Phil Stephens
- 2 Wound Biology Group, School of Dentistry, Cardiff Institute of Tissue Engineering and Repair, Cardiff University , Cardiff, United Kingdom
| | - Bing Song
- 2 Wound Biology Group, School of Dentistry, Cardiff Institute of Tissue Engineering and Repair, Cardiff University , Cardiff, United Kingdom
| | - David Barrow
- 1 Biomedical Engineering Research Group, Cardiff School of Engineering, Cardiff University , Cardiff, United Kingdom
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17
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Zhang YS, Zhu C, Xia Y. Inverse Opal Scaffolds and Their Biomedical Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:10.1002/adma.201701115. [PMID: 28649794 PMCID: PMC5581229 DOI: 10.1002/adma.201701115] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 03/23/2017] [Indexed: 05/04/2023]
Abstract
Three-dimensional porous scaffolds play a pivotal role in tissue engineering and regenerative medicine by functioning as biomimetic substrates to manipulate cellular behaviors. While many techniques have been developed to fabricate porous scaffolds, most of them rely on stochastic processes that typically result in scaffolds with pores uncontrolled in terms of size, structure, and interconnectivity, greatly limiting their use in tissue regeneration. Inverse opal scaffolds, in contrast, possess uniform pores inheriting from the template comprised of a closely packed lattice of monodispersed microspheres. The key parameters of such scaffolds, including architecture, pore structure, porosity, and interconnectivity, can all be made uniform across the same sample and among different samples. In conjunction with a tight control over pore sizes, inverse opal scaffolds have found widespread use in biomedical applications. In this review, we provide a detailed discussion on this new class of advanced materials. After a brief introduction to their history and fabrication, we highlight the unique advantages of inverse opal scaffolds over their non-uniform counterparts. We then showcase their broad applications in tissue engineering and regenerative medicine, followed by a summary and perspective on future directions.
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Affiliation(s)
- Yu Shrike Zhang
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA, 02139, USA
| | - Chunlei Zhu
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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18
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Synthesis of Injectable Alginate Hydrogels with Muscle-Derived Stem Cells for Potential Myocardial Infarction Repair. APPLIED SCIENCES-BASEL 2017. [DOI: 10.3390/app7030252] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Boire TC, Balikov DA, Lee Y, Guth CM, Cheung-Flynn J, Sung HJ. Biomaterial-Based Approaches to Address Vein Graft and Hemodialysis Access Failures. Macromol Rapid Commun 2016; 37:1860-1880. [PMID: 27673474 PMCID: PMC5156561 DOI: 10.1002/marc.201600412] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/15/2016] [Indexed: 12/19/2022]
Abstract
Veins used as grafts in heart bypass or as access points in hemodialysis exhibit high failure rates, thereby causing significant morbidity and mortality for patients. Interventional or revisional surgeries required to correct these failures have been met with limited success and exorbitant costs, particularly for the US Centers for Medicare & Medicaid Services. Vein stenosis or occlusion leading to failure is primarily the result of neointimal hyperplasia. Systemic therapies have achieved little long-term success, indicating the need for more localized, sustained, biomaterial-based solutions. Numerous studies have demonstrated the ability of external stents to reduce neointimal hyperplasia. However, successful results from animal models have failed to translate to the clinic thus far, and no external stent is currently approved for use in the US to prevent vein graft or hemodialysis access failures. This review discusses current progress in the field, design considerations, and future perspectives for biomaterial-based external stents. More comparative studies iteratively modulating biomaterial and biomaterial-drug approaches are critical in addressing mechanistic knowledge gaps associated with external stent application to the arteriovenous environment. Addressing these gaps will ultimately lead to more viable solutions that prevent vein graft and hemodialysis access failures.
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Affiliation(s)
- Timothy C Boire
- Department of Biomedical Engineering, Vanderbilt University, 37235, Nashville, TN, USA
| | - Daniel A Balikov
- Department of Biomedical Engineering, Vanderbilt University, 37235, Nashville, TN, USA
| | - Yunki Lee
- Department of Biomedical Engineering, Vanderbilt University, 37235, Nashville, TN, USA
| | - Christy M Guth
- Division of Vascular Surgery, Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, 37235, USA
| | - Joyce Cheung-Flynn
- Division of Vascular Surgery, Department of Surgery, Vanderbilt University Medical Center, Nashville, TN, 37235, USA
| | - Hak-Joon Sung
- Department of Biomedical Engineering, Vanderbilt University, 37235, Nashville, TN, USA
- Severance Biomedical Science Institute, College of Medicine, Yonsei University, Seoul, 120-752, Republic of Korea
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20
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de la Portilla F, Pereira S, Molero M, De Marco F, Perez-Puyana V, Guerrero A, Romero A. Microstructural, mechanical, and histological evaluation of modified alginate-based scaffolds. J Biomed Mater Res A 2016; 104:3107-3114. [PMID: 27506966 DOI: 10.1002/jbm.a.35857] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/01/2016] [Accepted: 08/05/2016] [Indexed: 12/16/2022]
Abstract
Scaffolds are three-dimensional structures used for tissue regeneration being the base in tissue engineering. These scaffolds are obtained from natural and/or synthetic polymers and they should satisfy some specific requirements such as biocompatibility, suitable mechanical, and microstructural properties to favor cellular adhesion and neovascularization. This work shows a preclinic study about the production of low and medium molecular weight alginate through the use of calcium salts (calcium glutamate). The results showed prove that better structures, distribution, and pore sizes as well as better mechanical properties correspond to medium molecular weight alginate and higher calcium salts concentration. This type of scaffold, after muscular cells cultivation, has been proved as an excellent material for muscle growth. The histopathological analysis shows a low inflammatory response, without a foreign body reaction, suitable neovascularization and good fibroblasts incorporation. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 3107-3114, 2016.
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Affiliation(s)
- F de la Portilla
- Department of General and Digestive Surgery, Unit Colorrectal Surgery, "Virgen del Rocío" University Hospital/IBiS/CSIC/University of Seville, Seville, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBEREHD o Ciberehd), Instituto de Salud Carlos III, Spain
| | - S Pereira
- Institute of Biomedicine of Seville (IBiS), "Virgen del Rocío" University Hospital/IBiS/CSIC/University of Seville, Seville, Spain
| | - M Molero
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - F De Marco
- Institute of Biomedicine of Seville (IBiS), "Virgen del Rocío" University Hospital/IBiS/CSIC/University of Seville, Seville, Spain
| | - V Perez-Puyana
- Department of Chemical Engineering, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - A Guerrero
- Department of Chemical Engineering, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - A Romero
- Department of Chemical Engineering, Faculty of Chemistry, University of Seville, Sevilla, Spain.
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Tallawi M, Rosellini E, Barbani N, Cascone MG, Rai R, Saint-Pierre G, Boccaccini AR. Strategies for the chemical and biological functionalization of scaffolds for cardiac tissue engineering: a review. J R Soc Interface 2015; 12:20150254. [PMID: 26109634 PMCID: PMC4528590 DOI: 10.1098/rsif.2015.0254] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 05/19/2015] [Indexed: 12/11/2022] Open
Abstract
The development of biomaterials for cardiac tissue engineering (CTE) is challenging, primarily owing to the requirement of achieving a surface with favourable characteristics that enhances cell attachment and maturation. The biomaterial surface plays a crucial role as it forms the interface between the scaffold (or cardiac patch) and the cells. In the field of CTE, synthetic polymers (polyglycerol sebacate, polyethylene glycol, polyglycolic acid, poly-l-lactide, polyvinyl alcohol, polycaprolactone, polyurethanes and poly(N-isopropylacrylamide)) have been proven to exhibit suitable biodegradable and mechanical properties. Despite the fact that they show the required biocompatible behaviour, most synthetic polymers exhibit poor cell attachment capability. These synthetic polymers are mostly hydrophobic and lack cell recognition sites, limiting their application. Therefore, biofunctionalization of these biomaterials to enhance cell attachment and cell material interaction is being widely investigated. There are numerous approaches for functionalizing a material, which can be classified as mechanical, physical, chemical and biological. In this review, recent studies reported in the literature to functionalize scaffolds in the context of CTE, are discussed. Surface, morphological, chemical and biological modifications are introduced and the results of novel promising strategies and techniques are discussed.
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Affiliation(s)
- Marwa Tallawi
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Elisabetta Rosellini
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, 56126 Pisa, Italy
| | - Niccoletta Barbani
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, 56126 Pisa, Italy
| | - Maria Grazia Cascone
- Department of Civil and Industrial Engineering, University of Pisa, Largo Lucio Lazzarino, 56126 Pisa, Italy
| | - Ranjana Rai
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Guillaume Saint-Pierre
- Inspiralia, Materials Laboratory, C/Faraday 7, Lab 3.02, Campus de Cantoblanco, Madrid 28049, Spain
| | - Aldo R. Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, 91058 Erlangen, Germany
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Gao Q, Hu B, Ning Q, Ye C, Xie J, Ye J, Gao C. A primary study of poly(propylene fumarate)-2-hydroxyethyl methacrylate copolymer scaffolds for tarsal plate repair and reconstruction in rabbit eyelids. J Mater Chem B 2015; 3:4052-4062. [PMID: 32262627 DOI: 10.1039/c5tb00285k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eyelid reconstruction includes anterior lamella reconstruction and posterior lamella reconstruction. As an important skeletal component of the posterior lamella, tarsal plates repair is the key issue for eyelid reconstruction. Presently, neither traditional surgery nor autograft/allograft has achieved satisfactory repair effects. Poly(propylene fumarate)-co-2-hydroxyethyl methacrylate (PPF-HEMA) networks with mass ratios of 1 : 0.5, 1 : 1 and 1 : 2 were synthesized and used as the tarsal substitute in this study. Their chemical compositions, swelling ability, and mechanical properties were characterized. Porous scaffolds were fabricated by a gelatin particle leaching method. The in vitro studies of cytotoxicity on human dermal fibroblasts (HDFs) and degradation demonstrated that PPF-HEMA scaffolds did not have noticeable cell cytotoxicity and their degradation rates correlated with the ratio of PPF to HEMA. The PPF-HEMA networks, with mass ratios of 1 : 1 and 1 : 2, and an ADM control were implanted in rabbits with tarsal plate defects for in vivo biocompatibility and degradation behavior evaluation. PPF-HEMA scaffolds provided satisfactory repair results with mild tissue response and biocompatibility to fibroblast growth and fibrous capsulation compared to the ADM control. The tissue compatible and biodegradable PPF-HEMA networks with elastic mechanical properties were proven to be a suitable candidate for tarsal repair.
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Affiliation(s)
- Qi Gao
- Department of Ophthalmology, the Second Affiliated Hospital of Zhejiang University, College of Medicine, Hangzhou, Zhejiang 310009, China.
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Dastagir K, Reimers K, Lazaridis A, Jahn S, Maurer V, Strauß S, Dastagir N, Radtke C, Kampmann A, Bucan V, Vogt PM. Murine embryonic fibroblast cell lines differentiate into three mesenchymal lineages to different extents: new models to investigate differentiation processes. Cell Reprogram 2015; 16:241-52. [PMID: 25068630 DOI: 10.1089/cell.2014.0005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Various diseases, injuries, and congenital abnormalities may result in degeneration and loss of organs and tissues. Recently, tissue engineering has offered new treatment options for these common, severe, and costly problems in human health care. Its application is often based on the usage of differentiated stem cells. However, despite intensive research and growing knowledge, many questions remain unresolved in the process of cell differentiation. The aim of this study was to find standardized cell models for analyzing molecular mechanisms of cell differentiation. We investigated the multipotency of three standardized murine embryonic fibroblast cell cultures using histological staining, western blotting, and quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR). Our results demonstrated that NIH-3T3 and mouse embryonic fibroblast (MEF) cells were able to differentiate into adipogenic, chondrogenic, and osteogenic lineages expressing typical differentiation markers. Interestingly, Flp-In-3T3 cells did not differentiate into any of the three mesenchymal lineages, although this cell line is genetically closely related to NIH-3T3. The results were confirmed by histological staining. Flp-In-3T3, NIH-3T3, and MEF cells have usually been used for DNA transfections, recombinant protein expression, and as "feeder cells." Unlike mesenchymal stem cells (MSCs) and mesenchymal progenitor cells (MPCs), they are easy to obtain and to expand and are less prone to change their structure and morphology, even at higher passages. Our results suggest that Flp-In-3T3, MEF, and NIH-3T3 cells are highly suitable to be used as models to analyze molecular mechanisms of cell differentiation.
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Affiliation(s)
- Khaled Dastagir
- 1 Department of Plastic, Hand, and Reconstructive Surgery, Hannover Medical , 30659 Hannover, Germany
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Somo SI, Akar B, Bayrak ES, Larson JC, Appel AA, Mehdizadeh H, Cinar A, Brey EM. Pore Interconnectivity Influences Growth Factor-Mediated Vascularization in Sphere-Templated Hydrogels. Tissue Eng Part C Methods 2015; 21:773-85. [PMID: 25603533 DOI: 10.1089/ten.tec.2014.0454] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Rapid and controlled vascularization within biomaterials is essential for many applications in regenerative medicine. The extent of vascularization is influenced by a number of factors, including scaffold architecture. While properties such as pore size and total porosity have been studied extensively, the importance of controlling the interconnectivity of pores has received less attention. A sintering method was used to generate hydrogel scaffolds with controlled pore interconnectivity. Poly(methyl methacrylate) microspheres were used as a sacrificial agent to generate porous poly(ethylene glycol) diacrylate hydrogels with interconnectivity varying based on microsphere sintering conditions. Interconnectivity levels increased with sintering time and temperature with resultant hydrogel structure showing agreement with template structure. Porous hydrogels with a narrow pore size distribution (130-150 μm) and varying interconnectivity were investigated for their ability to influence vascularization in response to gradients of platelet-derived growth factor-BB (PDGF-BB). A rodent subcutaneous model was used to evaluate vascularized tissue formation in the hydrogels in vivo. Vascularized tissue invasion varied with interconnectivity. At week 3, higher interconnectivity hydrogels had completely vascularized with twice as much invasion. Interconnectivity also influenced PDGF-BB transport within the scaffolds. An agent-based model was used to explore the relative roles of steric and transport effects on the observed results. In conclusion, a technique for the preparation of hydrogels with controlled pore interconnectivity has been developed and evaluated. This method has been used to show that pore interconnectivity can independently influence vascularization of biomaterials.
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Affiliation(s)
- Sami I Somo
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,2 Research Service, Hines Veterans Administration Hospital , Hines, Illinois
| | - Banu Akar
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,2 Research Service, Hines Veterans Administration Hospital , Hines, Illinois
| | - Elif S Bayrak
- 3 Department of Chemical and Biological Engineering, Illinois Institute of Technology , Chicago, Illinois
| | - Jeffery C Larson
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,2 Research Service, Hines Veterans Administration Hospital , Hines, Illinois
| | - Alyssa A Appel
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,2 Research Service, Hines Veterans Administration Hospital , Hines, Illinois
| | - Hamidreza Mehdizadeh
- 3 Department of Chemical and Biological Engineering, Illinois Institute of Technology , Chicago, Illinois
| | - Ali Cinar
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,3 Department of Chemical and Biological Engineering, Illinois Institute of Technology , Chicago, Illinois
| | - Eric M Brey
- 1 Department of Biomedical Engineering, Illinois Institute of Technology , Chicago, Illinois.,2 Research Service, Hines Veterans Administration Hospital , Hines, Illinois
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AbdulQader ST, Kannan TP, Rahman IA, Ismail H, Mahmood Z. Effect of different calcium phosphate scaffold ratios on odontogenic differentiation of human dental pulp cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 49:225-233. [PMID: 25686943 DOI: 10.1016/j.msec.2014.12.070] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Revised: 10/29/2014] [Accepted: 12/17/2014] [Indexed: 01/01/2023]
Abstract
Calcium phosphate (CaP) scaffolds have been widely and successfully used with osteoblast cells for bone tissue regeneration. However, it is necessary to investigate the effects of these scaffolds on odontoblast cells' proliferation and differentiation for dentin tissue regeneration. In this study, three different hydroxyapatite (HA) to beta tricalcium phosphate (β-TCP) ratios of biphasic calcium phosphate (BCP) scaffolds, BCP20, BCP50, and BCP80, with a mean pore size of 300μm and 65% porosity were prepared from phosphoric acid (H2PO4) and calcium carbonate (CaCO3) sintered at 1000°C for 2h. The extracts of these scaffolds were assessed with regard to cell viability and differentiation of odontoblasts. The high alkalinity, more calcium, and phosphate ions released that were exhibited by BCP20 decreased the viability of human dental pulp cells (HDPCs) as compared to BCP50 and BCP80. However, the cells cultured with BCP20 extract expressed high alkaline phosphatase activity and high expression level of bone sialoprotein (BSP), dental matrix protein-1 (DMP-1), and dentin sialophosphoprotein (DSPP) genes as compared to that cultured with BCP50 and BCP80 extracts. The results highlighted the effect of different scaffold ratios on the cell microenvironment and demonstrated that BCP20 scaffold can support HDPC differentiation for dentin tissue regeneration.
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Affiliation(s)
- Sarah Talib AbdulQader
- School of Dental Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia; Department of Pedodontic and Preventive Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Thirumulu Ponnuraj Kannan
- School of Dental Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia; Human Genome Centre, School of Medical Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
| | - Ismail Ab Rahman
- School of Dental Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
| | - Hanafi Ismail
- School of Materials and Minerals Resource Engineering, Universiti Sains Malaysia, 14300 Penang, Malaysia
| | - Zuliani Mahmood
- School of Dental Sciences, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia
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26
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de Jong R, van Hout GPJ, Houtgraaf JH, Kazemi K, Wallrapp C, Lewis A, Pasterkamp G, Hoefer IE, Duckers HJ. Intracoronary infusion of encapsulated glucagon-like peptide-1-eluting mesenchymal stem cells preserves left ventricular function in a porcine model of acute myocardial infarction. Circ Cardiovasc Interv 2014; 7:673-83. [PMID: 25294400 DOI: 10.1161/circinterventions.114.001580] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND Engraftment and survival of stem cells in the infarcted myocardium remain problematic in cell-based therapy for cardiovascular disease. To overcome these issues, encapsulated mesenchymal stem cells (eMSCs) were developed that were transfected to produce glucagon-like peptide-1, an incretin hormone with known cardioprotective effects, alongside MSC endogenous paracrine factors. This study was designed to investigate the efficacy of different doses of intracoronary infusion of eMSC in a porcine model of acute myocardial infarction (AMI). METHODS AND RESULTS One hundred pigs were subjected to a moderate AMI (posterolateral AMI; n=50) or a severe AMI (anterior AMI; n=50), whereupon surviving animals (n=36 moderate, n=33 severe) were randomized to receive either intracoronary infusion of 3 incremental doses of eMSC or Ringers' lactate control. Cardiac function was assessed using invasive hemodynamics, echocardiography, and histological analysis. A trend was observed in the moderate AMI model, whereas in the severe AMI model, left ventricular ejection fraction improved by +9.3% (P=0.004) in the best responding eMSC group, because of a preservation of left ventricular end-systolic volume. Arteriolar density increased 3-fold in the infarct area (8.4±0.9/mm(2) in controls versus 22.2±2.6/mm(2) in eMSC group; P<0.001). Although not statistically significant, capillary density was 30% higher in the border zone (908.1±99.7/mm(2) in control versus 1209.0±64.6/mm(2) in eMSC group; P=ns). CONCLUSIONS eMSCs enable sustained local delivery of cardioprotective proteins to the heart, thereby enhancing angiogenesis and preserving contractile function in an animal AMI model.
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Affiliation(s)
- Renate de Jong
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Gerardus P J van Hout
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Jaco H Houtgraaf
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Kushan Kazemi
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Christine Wallrapp
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Andrew Lewis
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Gerard Pasterkamp
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Imo E Hoefer
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.)
| | - Henricus J Duckers
- From the Department of Cardiology, Thorax Center, Erasmus University Medical Center, Rotterdam, The Netherlands (R.d.J., J.H.H., K.K.); Experimental Cardiology Laboratory, University and Medical Center Utrecht, The Netherlands (G.P.J.v.H., G.P., I.E.H.); BTG International Germany GmbH, Alzenau, Germany (C.W.); Biocompatibles UK Ltd, a BTG International Group Company, Farnham, United Kingdom (A.L.); and Department of Cardiology, University Medical Center Utrecht, Utrecht, The Netherlands (H.J.D.).
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27
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Fon D, Al‐Abboodi A, Chan PPY, Zhou K, Crack P, Finkelstein DI, Forsythe JS. Effects of GDNF-loaded injectable gelatin-based hydrogels on endogenous neural progenitor cell migration. Adv Healthc Mater 2014; 3:761-74. [PMID: 24596339 DOI: 10.1002/adhm.201300287] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 10/11/2013] [Indexed: 12/21/2022]
Abstract
Brain repair following disease and injury is very limited due to difficulties in recruiting and mobilizing stem cells towards the lesion. More importantly, there is a lack of structural and trophic support to maintain viability of the limited stem/progenitor cells present. This study investigates the effectiveness of an injectable gelatin-based hydrogel in attracting neural progenitor cells (NPCs) from the subventricular zone (SVZ) towards the implant. Glial cell-line-derived neurotrophic factor (GDNF) encapsulated within the hydrogel and porosity within the hydrogel prevents glial scar formation. By directly targeting the hydrogel implant towards the SVZ, neuroblasts can actively migrate towards and along the implant tract. Significantly more doublecortin (DCX)-positive neuroblasts surround implants at 7 d post-implantation (dpi) compared with lesion alone controls, an effect that is enhanced when GDNF is incorporated into the hydrogels. Neuroblasts are not observed at the implant boundary at 21 dpi, indicating that neuroblast migration has halted, and neuroblasts have either matured or have not survived. The development of an injectable gelatin-based hydrogel has significant implications for the treatment of some neurodegenerative diseases and brain injuries. The ability of GDNF and porosity to effectively prevent glial scar formation will allow better integration and interaction between the implant and surrounding neural tissue.
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Affiliation(s)
- Deniece Fon
- Department of Materials Engineering Monash University Clayton VIC 3800 Australia
| | - Aswan Al‐Abboodi
- Department of Chemical Engineering Monash University Clayton VIC 3800 Australia
- Micro/Nanophysics Research Laboratory RMIT University Melbourne VIC 3000 Australia
| | - Peggy P. Y. Chan
- Micro/Nanophysics Research Laboratory RMIT University Melbourne VIC 3000 Australia
- Melbourne Centre for Nanofabrication Clayton VIC 3168 Australia
| | - Kun Zhou
- Department of Materials Engineering Monash University Clayton VIC 3800 Australia
| | - Peter Crack
- Department of Pharmacology The University of Melbourne Parkville VIC 3010 Australia
| | - David I. Finkelstein
- Florey Institute of Neuroscience and Mental Health, Parkville The University of Melbourne VIC 3010 Australia
| | - John S. Forsythe
- Department of Materials Engineering Monash University Clayton VIC 3800 Australia
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28
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Walters BD, Stegemann JP. Strategies for directing the structure and function of three-dimensional collagen biomaterials across length scales. Acta Biomater 2014; 10:1488-501. [PMID: 24012608 PMCID: PMC3947739 DOI: 10.1016/j.actbio.2013.08.038] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 08/17/2013] [Accepted: 08/28/2013] [Indexed: 12/16/2022]
Abstract
Collagen type I is a widely used natural biomaterial that has found utility in a variety of biological and medical applications. Its well-characterized structure and role as an extracellular matrix protein make it a highly relevant material for controlling cell function and mimicking tissue properties. Collagen type I is abundant in a number of tissues, and can be isolated as a purified protein. This review focuses on hydrogel biomaterials made by reconstituting collagen type I from a solubilized form, with an emphasis on in vitro studies in which collagen structure can be controlled. The hierarchical structure of collagen from the nanoscale to the macroscale is described, with an emphasis on how structure is related to function across scales. Methods of reconstituting collagen into hydrogel materials are presented, including molding of macroscopic constructs, creation of microscale modules and electrospinning of nanoscale fibers. The modification of collagen biomaterials to achieve the desired structures and functions is also addressed, with particular emphasis on mechanical control of collagen structure, creation of collagen composite materials and crosslinking of collagenous matrices. Biomaterials scientists have made remarkable progress in rationally designing collagen-based biomaterials and in applying them both to the study of biology and for therapeutic benefit. This broad review illustrates recent examples of techniques used to control collagen structure and thereby to direct its biological and mechanical functions.
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Affiliation(s)
- B D Walters
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, MI 48109, USA
| | - J P Stegemann
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, MI 48109, USA.
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29
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Growth and survival of cells in biosynthetic poly vinyl alcohol–alginate IPN hydrogels for cardiac applications. Colloids Surf B Biointerfaces 2013; 107:137-45. [DOI: 10.1016/j.colsurfb.2013.01.069] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 01/31/2013] [Accepted: 01/31/2013] [Indexed: 11/19/2022]
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Zhang YS, Regan KP, Xia Y. Controlling the pore sizes and related properties of inverse opal scaffolds for tissue engineering applications. Macromol Rapid Commun 2013; 34:485-91. [PMID: 23365045 DOI: 10.1002/marc.201200740] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 12/21/2012] [Indexed: 12/13/2022]
Abstract
Inverse opal scaffolds are finding widespread use in tissue engineering and regenerative medicine. Herein, the way in which the pore sizes and related physical properties of poly(D,L-lactide-co-glycolide) inverse opal scaffolds are affected by the fabrication conditions is systematically investigated. It is found that the window size of an inverse opal scaffold is mainly determined by the annealing temperature rather than the duration of time, and the surface pore size is largely determined by the concentration of the infiltration solution. Although scaffolds with larger pore or window sizes facilitate faster migration of cells, they show slightly lower compressive moduli than scaffolds with smaller pore or window sizes.
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Affiliation(s)
- Yu Shrike Zhang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
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31
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Choi SW, Zhang Y, MacEwan MR, Xia Y. Neovascularization in biodegradable inverse opal scaffolds with uniform and precisely controlled pore sizes. Adv Healthc Mater 2013; 2:145-54. [PMID: 23184495 PMCID: PMC3541475 DOI: 10.1002/adhm.201200106] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 07/01/2012] [Indexed: 11/09/2022]
Abstract
The formation of a stable vascular network in a scaffold is one of the most challenging tasks in tissue engineering and regenerative medicine. Despite the common use of porous scaffolds in these applications, little is known about the effect of pore size on the neovascularization in these scaffolds. Herein is fabricated poly(D, L-lactide-co-glycolide) inverse opal scaffolds with uniform pore sizes of 79, 147, 224, and 312 μm in diameter and which are then used to systematically study neovascularization in vivo. Histology analyses reveal that scaffolds with small pores (<200 μm) favor the formation of vascular networks with small vessels at high densities and poor penetration depth. By contrast, scaffolds with large pores (>200 μm) favor the formation of vascular networks with large blood vessels at low densities and deep penetration depth. Based on the different patterns of vessel ingrowth as regulated by the pore size, a model is proposed to describe vascularization in a 3D porous scaffold, which can potentially serve as a guideline for future design of porous scaffolds.
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Affiliation(s)
| | | | | | - Younan Xia
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130 (USA)
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32
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Gomez-Mauricio RG, Acarregui A, Sánchez-Margallo FM, Crisóstomo V, Gallo I, Hernández RM, Pedraz JL, Orive G, Martín-Cancho MF. A preliminary approach to the repair of myocardial infarction using adipose tissue-derived stem cells encapsulated in magnetic resonance-labelled alginate microspheres in a porcine model. Eur J Pharm Biopharm 2012; 84:29-39. [PMID: 23266493 DOI: 10.1016/j.ejpb.2012.11.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 11/16/2012] [Accepted: 11/27/2012] [Indexed: 01/18/2023]
Abstract
Adipose tissue-derived stem cells (ASCs) have properties of self-renewal, pluripotency and high proliferative capability that make them useful for the treatment of cardiac ventricular function following ischaemic injury. However, their therapeutic use is limited due to the low retention of the cells at the targeted site. To address this issue, we developed semipermeable membrane microcapsules labelled with Endorem (magnetocapsules) that provide mechanical and immunological immune protection to the cells while maintaining internal cell microenvironment. In addition, the particles allow tracking the presence and migration of injected cells in vivo by Magnetic Resonance Imaging (MRI). Results indicate that after 21 days in culture, the cells encapsulated in the magnetocapsules showed similar viabilities than cells encapsulated in conventional microcapsules. MRI confirmed a gradual loss of the intensity of the iron oxide label in the non-encapsulated Endorem labelled cells, while magnetocapsules were detected throughout the study period, suggesting that cell retention in the myocardium is improved when cells are enclosed within the magnetocapsules. To further evaluate treatment's effect on global cardiac function, MRI determination of infarct size and left ventricular ejection fraction (LVEF) was performed. In vivo results showed no statistically significant differences in heart rate and cardiac output between treatment groups. In conclusion, cells enclosed within magnetocapsules have shown suitable viability and have been detected in vivo throughout the study period. Further studies will evaluate whether increasing cell loading with the particles may help to improve the therapeutic results.
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Acarregui A, Murua A, Pedraz JL, Orive G, Hernández RM. A Perspective on Bioactive Cell Microencapsulation. BioDrugs 2012; 26:283-301. [DOI: 10.1007/bf03261887] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Yan LY, Chen H, Li P, Kim DH, Chan-Park MB. Finely dispersed single-walled carbon nanotubes for polysaccharide hydrogels. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4610-4615. [PMID: 22909447 DOI: 10.1021/am300985p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Here we demonstrate a polysaccharide hydrogel reinforced with finely dispersed single-walled carbon nanotubes (SWNTs) using biocompatible dispersants O-carboxymethylchitosan (OC) and chondroitin sulfate A (CS-A) as a structural support. Both of the dispersants can disperse SWNTs in aqueous solutions and hydrogel matrix as individual tubes or small bundles. Additionally, we have found that compressive modulus and strain of the hydrogels reinforced with SWNTs were enhanced as much as two times by the addition of a few weight percent of SWNTs. Moreover, the SWNT-incorporated hydrogels exhibited lower impedance and higher charge capacity than the alginate/dispersant hydrogel without SWNTs. The OC and the CS-A demonstrated much higher reinforcing enhancement than a commercially available dispersant, sodium dodecyl sulfate. Combined with the experimental data on the mechanical and electrical properties, the biocompatibility of OC and CS-A can provide the possibility of biomedical application of the SWNT-reinforced hydrogels.
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Affiliation(s)
- Liang Yu Yan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457, Singapore
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Coutinho DF, Ahari AF, Kachouie NN, Gomes ME, Neves NM, Reis RL, Khademhosseini A. An automated two-phase system for hydrogel microbead production. Biofabrication 2012; 4:035003. [PMID: 22914562 DOI: 10.1088/1758-5082/4/3/035003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Polymeric beads have been used for protection and delivery of bioactive materials, such as drugs and cells, for different biomedical applications. Here, we present a generic two-phase system for the production of polymeric microbeads of gellan gum or alginate, based on a combination of in situ polymerization and phase separation. Polymer droplets, dispensed using a syringe pump, formed polymeric microbeads while passing through a hydrophobic phase. These were then crosslinked, and thus stabilized, in a hydrophilic phase as they crossed through the hydrophobic-hydrophilic interface. The system can be adapted to different applications by replacing the bioactive material and the hydrophobic and/or the hydrophilic phases. The size of the microbeads was dependent on the system parameters, such as needle size and solution flow rate. The size and morphology of the microbeads produced by the proposed system were uniform, when parameters were kept constant. This system was successfully used for generating polymeric microbeads with encapsulated fluorescent beads, cell suspensions and cell aggregates proving its ability for generating bioactive carriers that can potentially be used for drug delivery and cell therapy.
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Affiliation(s)
- Daniela F Coutinho
- 3B's Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Taipas, 4806-909 Guimarães, Portugal
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Olderøy MO, Xie M, Andreassen JP, Strand BL, Zhang Z, Sikorski P. Viscoelastic properties of mineralized alginate hydrogel beads. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1619-1627. [PMID: 22552827 DOI: 10.1007/s10856-012-4655-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 04/17/2012] [Indexed: 05/31/2023]
Abstract
Alginate hydrogels have applications in biomedicine, ranging from delivery of cells and growth factors to wound management aids. However, they are mechanically soft and have shown little potential for the use in bone tissue engineering. Here, the viscoelastic properties of alginate hydrogel beads mineralized with calcium phosphate, both by a counter-diffusion (CD) and an enzymatic approach, are characterized by a micro-manipulation technique and mathematical modeling. Fabricated hydrogel materials have low mineral content (below 3 % of the total hydrogel mass, which corresponds to mineral content of up to 60 % of the dry mass) and low dry mass content (<5 %). For all samples compression and hold (relaxation after compression) data was collected and analyzed. The apparent Young's modulus of the mineralized beads was estimated by the Hertz model (compression data) and was shown to increase up to threefold upon mineralization. The enzymatically mineralized beads showed higher apparent Young's modulus compared to the ones mineralized by CD, even though the mineral content of the former was lower. Full compression-relaxation force-time profiles were analyzed using viscoelastic model. From this analysis, infinite and instantaneous Young's moduli were determined. Similarly, enzymatic mineralized beads, showed higher instantaneous and infinite Young's modulus, even if the degree of mineralization is lower then that achieved for CD method. This leads to the conclusion that both the degree of mineralization and the spatial distribution of mineral are important for the mechanical performance of the composite beads, which is in analogy to highly structured mineralized tissues found in many organisms.
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Affiliation(s)
- Magnus O Olderøy
- Department of Physics, Norwegian University of Science and Technology, 7491, Trondheim, Norway
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37
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Liu J, Zhang Z, Liu Y, Guo C, Gong Y, Yang S, Ma M, Li Z, Gao WQ, He Z. Generation, characterization, and potential therapeutic applications of cardiomyocytes from various stem cells. Stem Cells Dev 2012; 21:2095-110. [PMID: 22428725 DOI: 10.1089/scd.2012.0031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Heart failure is one of the leading causes of death worldwide. Myocardial cell transplantation emerges as a novel therapeutic strategy for heart failure, but this approach has been hampered by severe shortage of human cardiomyocytes. We have recently induced mouse embryonic stem cells to differentiate into embryoid bodies and eventually, cardiomyocytes. Here, we address recent advancements in cardiomyocyte differentiation from cardiac stem cells and pluripotent stem cells. We highlight the methodologies, using growth factors, endoderm-like cell cocultures, small molecules, and biomaterials, in directing the differentiation of pluripotent stem cells into cardiomyocytes. The characterization and identification of pluripotent stem cell-derived cardiomyocytes by morphological, phenotypic, and functional features are also discussed. Notably, increasing evidence demonstrates that cardiomyocytes may be generated from the stem cells of several tissues outside the cardiovascular system, including skeletal muscles, bone marrow, testes, placenta, amniotic fluid, and adipose tissues. We further address the potential applications of cardiomyocytes derived from various kinds of stem cells. The differentiation of stem cells into functional cardiomyocytes, especially from an extra-cardiac stem cell source, would circumvent the scarcity of heart donors and human cardiomyocytes, and, most importantly, it would offer an ideal and promising cardiomyocyte source for cell therapy and tissue engineering in treating heart failure.
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Affiliation(s)
- Jianfang Liu
- Clinical Stem Cell Research Center, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Teo A, Mantalaris A, Lim M. Hydrodynamics and bioprocess considerations in designing bioreactors for cardiac tissue engineering. ACTA ACUST UNITED AC 2012. [DOI: 10.7243/2050-1218-1-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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