4.7 Article

Functional differentiation and scalable production of renal proximal tubular epithelial cells from human pluripotent stem cells in a dynamic culture system

Journal

CELL PROLIFERATION
Volume 55, Issue 3, Pages -

Publisher

WILEY
DOI: 10.1111/cpr.13190

Keywords

alginate; bioreactor; functional tubular epithelial cells; kidney differentiation; Pluripotent stem cells

Categories

Funding

  1. Bundesministerium fur Bildung und Forschung-BMBF [01EK1612D]
  2. Bundesministerium fur Wirtschaft und Technologie [ZF4274303]

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This study provides a standardized protocol for the large-scale production of proximal tubular epithelial cells (PTEC) generated from human pluripotent stem cells (hPSC). The researchers successfully expanded and differentiated hPSC into PTEC using a bioLevitator platform and matrix-coated alginate beads. The functional PTEC exhibited microvilli and clear apico-basal localization of markers, and showed active reabsorption and response to drug treatment. This method may have the potential for automatable production of functional human PTEC.
Objective To provide a standardized protocol for large-scale production of proximal tubular epithelial cells (PTEC) generated from human pluripotent stem cells (hPSC). Methods The hPSC were expanded and differentiated into PTEC on matrix-coated alginate beads in an automated levitating fluidic platform bioLevitator. Differentiation efficacy was evaluated by immunofluorescence staining and flow cytometry, ultrastructure visualized by electron microscopy. Active reabsorption by PTEC was investigated by glucose, albumin, organic anions and cations uptake assays. Finally, the response to cisplatin-treatment was assessed to check the potential use of PTEC to model drug-induced nephrotoxicity. Results hPSC expansion and PTEC differentiation could be performed directly on matrix-coated alginate beads in suspension bioreactors. Renal precursors arose 4 days post hPSC differentiation and PTEC after 8 days with 80% efficiency, with a 10-fold expansion from hPSC in 24 days. PTEC on beads, exhibited microvilli and clear apico-basal localization of markers. Functionality of PTECs was confirmed by uptake of glucose, albumin, organic anions and cations and expression of KIM-1 after Cisplatin treatment. Conclusion We demonstrate the efficient expansion of hPSC, controlled differentiation to renal progenitors and further specification to polarized tubular epithelial cells. This is the first report employing biolevitation and matrix-coated beads in a completely defined medium for the scalable and potentially automatable production of functional human PTEC.

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