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Ran P, Chen W, Wei J, Qiu B, Chen M, Xie S, Li X. Macrophage Spheroids with Chronological Phenotype Shifting To Promote Therapeutic Angiogenesis in Critical Limb Ischemia. ACS APPLIED BIO MATERIALS 2020; 3:3707-3717. [DOI: 10.1021/acsabm.0c00333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pan Ran
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Weijia Chen
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Jiaojun Wei
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Bo Qiu
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Maohua Chen
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Songzhi Xie
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
| | - Xiaohong Li
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
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De Moor L, Merovci I, Baetens S, Verstraeten J, Kowalska P, Krysko DV, De Vos WH, Declercq H. High-throughput fabrication of vascularized spheroids for bioprinting. Biofabrication 2018; 10:035009. [PMID: 29798932 DOI: 10.1088/1758-5090/aac7e6] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Overcoming the problem of vascularization remains the main challenge in the field of tissue engineering. As three-dimensional (3D) bioprinting is the rising technique for the fabrication of large tissue constructs, small prevascularized building blocks were generated that can be incorporated throughout a printed construct, answering the need for a microvasculature within the small micron range (<10 μm). Uniform spheroids with an ideal geometry and diameter for bioprinting were formed, using a high-throughput non-adhesive agarose microwell system. Since monoculture spheroids of endothelial cells were unable to remain stable, coculture spheroids combining endothelial cells with fibroblasts and/or adipose tissue derived mesenchymal stem cells (ADSC) as supporting cells, were created. When applying the favorable coculture ratio, viable spheroids were obtained and endothelial cells spontaneously formed a capillary-like network and lumina, as shown by immunohistochemistry and transmission electron microscopy. Especially the presence of ADSC led to a higher vascularization and extracellular matrix production of the microtissue. Moreover, spheroids were able to assemble at random in suspension and in a hydrogel, creating a macrotissue. During at random assembly, cells reorganized, creating a branched capillary-network throughout the entire fused construct by inoculating with capillaries of adjacent spheroids. Combining the advantage of this natural capacity of microtissues to self-assemble and the controlled organization by bioprinting technologies, these prevascularized spheroids can be useful as building blocks for the engineering of large vascularized 3D tissues.
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Affiliation(s)
- Lise De Moor
- Tissue engineering and Biomaterials Group, Department of Basic Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
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Grässer U, Bubel M, Sossong D, Oberringer M, Pohlemann T, Metzger W. Dissociation of mono- and co-culture spheroids into single cells for subsequent flow cytometric analysis. Ann Anat 2018; 216:1-8. [DOI: 10.1016/j.aanat.2017.10.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 10/26/2017] [Accepted: 10/27/2017] [Indexed: 02/06/2023]
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Oberringer M, Bubel M, Jennewein M, Guthörl S, Morsch T, Bachmann S, Metzger W, Pohlemann T. The role of adipose-derived stem cells in a self-organizing 3D model with regard to human soft tissue healing. Mol Cell Biochem 2018; 445:195-210. [PMID: 29305678 DOI: 10.1007/s11010-017-3265-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 12/23/2017] [Indexed: 12/15/2022]
Abstract
The clinical phenomenon of inadequate soft tissue healing still remains an important issue. The occurrence of chronic wounds is correlated to the life span, which is still increasing in western countries. Tissue engineering products containing adipose-derived stem cells are discussed as a promising therapeutic approach. Several studies confirmed the value of these cells for soft tissue healing improvement, suggesting a paracrine as well as a direct effect on vessel repair and angiogenesis. In an attempt to figure out specific effects of adipose-derived stem cells on dermal microvascular endothelial cells with respect to the different phases of soft tissue healing, we designed a 3D in vitro model on the basis of spheroids. Basic parameters like spheroid volume, cell numbers, and rate of apoptotic cells were determined in dependence on culture time, on different oxygen conditions and using mono- as well as co-cultures of both cell types. Furthermore we focused on gene expression and protein levels of interleukin-6, interleukin-8, monocyte chemoattractant protein-1, and vascular endothelial growth factor, which are discussed against the background of therapies for chronic wounds. The visualization of α-smooth muscle actin allowed the estimation of the function of adipose-derived stem cells as stabilizer for dermal microvascular endothelial cells. The results of the present 3D model underscore a paracrine effect of adipose-derived stem cells on microvessel repair during early hypoxic conditions, whereas a stabilizing effect occurs during a later phase of soft tissue healing, simultaneously to reoxygenation.
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Affiliation(s)
- Martin Oberringer
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany.
| | - Monika Bubel
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Martina Jennewein
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Silke Guthörl
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Tamara Morsch
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Sophie Bachmann
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Wolfgang Metzger
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
| | - Tim Pohlemann
- Department of Trauma-, Hand- and Reconstructive Surgery, Saarland University, Kirrberger Straße, Bldng. 57, 66421, Homburg, Germany
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Thomsen AR, Aldrian C, Bronsert P, Thomann Y, Nanko N, Melin N, Rücker G, Follo M, Grosu AL, Niedermann G, Layer PG, Heselich A, Lund PG. A deep conical agarose microwell array for adhesion independent three-dimensional cell culture and dynamic volume measurement. LAB ON A CHIP 2017; 18:179-189. [PMID: 29211089 DOI: 10.1039/c7lc00832e] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Multicellular spheroids represent a well-established 3D model to study healthy and diseased cells in vitro. The use of conventional 3D cell culture platforms for the generation of multicellular spheroids is limited to cell types that easily self-assemble into spheroids because less adhesive cells fail to form stable aggregates. A high-precision micromoulding technique developed in our laboratory produces deep conical agarose microwell arrays that allow the cultivation of uniform multicellular aggregates, irrespective of the spheroid formation capacity of the cells. Such hydrogel arrays warrant a steady nutrient supply for several weeks, permit live volumetric measurements to monitor cell growth, enable immunohistochemical staining, fluorescence-based microscopy, and facilitate immediate harvesting of cell aggregates. This system also allows co-cultures of two distinct cell types either in direct cell-cell contact or at a distance as the hydrogel permits diffusion of soluble compounds. Notably, we show that co-culture of a breast cancer cell line with bone marrow stromal cells enhances 3D growth of the cancer cells in this system.
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Affiliation(s)
- Andreas R Thomsen
- Department of Radiation Oncology, Medical Center - University of Freiburg, Germany.
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Rustenhoven J, Jansson D, Smyth LC, Dragunow M. Brain Pericytes As Mediators of Neuroinflammation. Trends Pharmacol Sci 2017; 38:291-304. [DOI: 10.1016/j.tips.2016.12.001] [Citation(s) in RCA: 156] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/01/2016] [Accepted: 12/01/2016] [Indexed: 01/03/2023]
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