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A comparative study of the capacity of mesenchymal stromal cell lines to form spheroids

Abstract : Mesenchymal stem cells (MSC)-spheroid models favor maintenance of stemness, ex vivo expansion and transplantation efficacy. Spheroids may also be considered as useful surrogate models of the hematopoietic niche. However, accessibility to primary cells, from bone marrow (BM) or adipose tissues, may limit their experimental use and the lack of consistency in methods to form spheroids may affect data interpretation. In this study, we aimed to create a simple model by examining the ability of cell lines, from human (HS-27a and HS-5) and murine (MS-5) BM origins, to form spheroids, compared to primary human MSCs (hMSCs). Our protocol efficiently allowed the spheroid formation from all cell types within 24 hours. Whilst hMSC-spheroids began to shrink after 24 hours, the size of spheroids from cell lines remained constant during three weeks. The difference was partially explained by the balance between proliferation and cell death, which could be triggered by hypoxia and induced oxidative stress. Our results demonstrate that, like hMSCs, MSC cell lines make reproductible spheroids that are easily handled. Thus, this model could help in understanding mechanisms involved in MSC functions and may provide a simple model by which to study cell interactions in the BM niche.
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Submitted on : Thursday, July 23, 2020 - 3:40:11 PM
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Margaux Deynoux, Nicola Sunter, Elfi Ducrocq, Hassan Dakik, Roseline Guibon, et al.. A comparative study of the capacity of mesenchymal stromal cell lines to form spheroids. PLoS ONE, Public Library of Science, 2020, 15 (6), pp.e0225485. ⟨10.1371/journal.pone.0225485⟩. ⟨inserm-02905659⟩



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