A human beta cell line with drug inducible excision of immortalizing transgenes.

Marion Benazra 1, 2 Marie-José Lecomte 3 Claire Colace 1, 2 Andreas Müller 4, 5 Cécile Machado 3 Séverine Pechberty 3 Emilie Bricout-Neveu 3 Maud Grenier-Godard 3 Michèle Solimena 6, 4, 5 Raphaël Scharfmann 7 Paul Czernichow 3 Philippe Ravassard 1, 2, *
* Auteur correspondant
1 ICM - Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute
2 Equipe Biotechnologie & Biotherapie
ICM - Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute, CHU Pitié-Salpêtrière [APHP]
3 Endocells’ Lab
4 Paul Langerhans Institute of the Helmholtz Center Munich
5 Biology Department
6 MPI-CBG - Max Planck Institute of Molecular Cell Biology and Genetics
7 UM3 (UMR 8104 / U1016) - Institut Cochin
Abstract : Access to immortalized human pancreatic beta cell lines that are phenotypically close to genuine adult beta cells, represent a major tool to better understand human beta cell physiology and develop new therapeutics for Diabetes. Here we derived a new conditionally immortalized human beta cell line, EndoC-βH3 in which immortalizing transgene can be efficiently removed by simple addition of tamoxifen. METHODS: We used lentiviral mediated gene transfer to stably integrate a tamoxifen inducible form of CRE (CRE-ERT2) into the recently developed conditionally immortalized EndoC βH2 line. The resulting EndoC-βH3 line was characterized before and after tamoxifen treatment for cell proliferation, insulin content and insulin secretion. RESULTS: We showed that EndoC-βH3 expressing CRE-ERT2 can be massively amplified in culture. We established an optimized tamoxifen treatment to efficiently excise the immortalizing transgenes resulting in proliferation arrest. In addition, insulin expression raised by 12 fold and insulin content increased by 23 fold reaching 2 μg of insulin per million cells. Such massive increase was accompanied by enhanced insulin secretion upon glucose stimulation. We further observed that tamoxifen treated cells maintained a stable function for 5 weeks in culture. CONCLUSIONS: EndoC βH3 cell line represents a powerful tool that allows, using a simple and efficient procedure, the massive production of functional non-proliferative human beta cells. Such cells are close to genuine human beta cells and maintain a stable phenotype for 5 weeks in culture.
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Molecular metabolism, Elsevier, 2015, 4 (12), pp.916-925. 〈10.1016/j.molmet.2015.09.008〉
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Marion Benazra, Marie-José Lecomte, Claire Colace, Andreas Müller, Cécile Machado, et al.. A human beta cell line with drug inducible excision of immortalizing transgenes.. Molecular metabolism, Elsevier, 2015, 4 (12), pp.916-925. 〈10.1016/j.molmet.2015.09.008〉. 〈inserm-01298792〉

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