We developed an original reproducible 3D-technology for preparation of single dormant microspheres consisting of 2000 somatic cells. The dynamics of microsphere assembly from mesenchymal and epithelial cells of retinal pigment epithelium was traced using time-lapse microscopy: formation of a loose aggregate over 24 h followed by its gradual consolidation and formation of a compact viable microsphere with a diameter of 100–150 μ by day 7. The cell number in the formed microspheres remains unchanged. Reactivation observed upon fusion of epithelial and/or mesenchymal microspheres results in the formation of a united compact microtissue. The fusion dynamics reproduces spherogenesis irrespective of the initial amount of co-cultured microspheres. Reactivation via two-step induced angiogenesis opens new prospects for production of vascularized microspheres and microtissues.
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Translated from Kletochnye Tekhnologii v Biologii i Meditsine, No. 3, pp. 161–168, July, 2014
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Repin, V.S., Saburina, I.N., Kosheleva, N.V. et al. 3D-Technology of the Formation and Maintenance of Single Dormant Microspheres from 2000 Human Somatic Cells and Their Reactivation In Vitro . Bull Exp Biol Med 158, 137–144 (2014). https://doi.org/10.1007/s10517-014-2709-4
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DOI: https://doi.org/10.1007/s10517-014-2709-4