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The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
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Embryonic and induced pluripotent stem cells are excellent models for disease research because of their ability to self-renew and differentiate into most cell types. Somatic cells from a patient are isolated and reprogrammed into induced pluripotent stem cells or iPSCs. These iPSCs are later differentiated into the desired cell type, which mirrors the diseased cell of the patient. In this way, disease models have been created for investigating diseases such as Down syndrome, type I diabetes,...
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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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Scalable Bioreactor-based Suspension Approach to Generate Stem Cell-derived Islets From Healthy Donor-derived iPSCs.

Kevin Verhoeff1,2, Nerea Cuesta-Gomez1,2,3, Jasmine Maghera1,4

  • 1Alberta Diabetes Institute, University of Alberta, Edmonton, AB, Canada.

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|December 10, 2024
PubMed
Summary
This summary is machine-generated.

Scalable differentiation of induced pluripotent stem cells (iPSCs) into islet cells was achieved using Vertical-Wheel bioreactors. This method enhances cell yield and reduces costs, paving the way for clinical applications of iPSC islet therapies.

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Area of Science:

  • Stem cell biology
  • Regenerative medicine
  • Biotechnology

Background:

  • Induced pluripotent stem cells (iPSCs) hold promise for generating patient-specific iPSC-derived islets.
  • Current limitations include challenges in scalability and ensuring product safety for therapeutic use.

Purpose of the Study:

  • To characterize cells generated via a bioreactor-based differentiation protocol for iPSC islets.
  • To assess the scalability and cost-effectiveness of the differentiation process.

Main Methods:

  • Stagewise characterization using flow cytometry, qPCR, patch clamping, and functional assays.
  • In vivo functional and immunohistochemistry evaluation of differentiated cells.
  • Assessment of cell yield and cost-efficiency in both semi-planar and suspension bioreactor systems.

Main Results:

  • The protocol successfully generated PDX1+/NKX6.1+ pancreatic progenitors and C-peptide+/NKX6.1+ iPSC islet cells.
  • While mature islet-like cells were observed, some off-target cell populations (ductal, enterochromaffin, gut cells) persisted.
  • Suspension differentiation in Vertical-Wheel bioreactors significantly increased cell yield (105.0 × 10^6 cells) and reduced costs by 88.8% compared to semi-planar methods.

Conclusions:

  • A scalable suspension-based approach using Vertical-Wheel bioreactors for iPSC islet differentiation was developed.
  • Thorough product characterization enables future optimization for off-target cell elimination.
  • Bioreactor-based suspension differentiation shows potential for enhancing scalability and clinical translation of iPSC islet therapies.