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Bioreactor development for stem cell expansion and controlled differentiation.

James A King1, William M Miller

  • 1Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL, United States.

Current Opinion in Chemical Biology
|July 28, 2007
PubMed
Summary
This summary is machine-generated.

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Large-scale stem cell production for therapies is advancing. Bioreactor advancements enable reproducible expansion of human and mouse stem cells, maintaining their therapeutic potential and markers.

Area of Science:

  • Biotechnology
  • Stem Cell Biology
  • Bioengineering

Background:

  • Therapeutic applications of stem cells necessitate large-scale, reproducible production.
  • Controlled conditions in bioreactors are crucial for maintaining stem cell quality and function.

Purpose of the Study:

  • To review recent progress in stem cell expansion using bioreactors.
  • To highlight methods for maintaining stem cell potential and characteristics during scale-up.

Main Methods:

  • Expansion of human mesenchymal stem cells in perfused scaffolds.
  • Cultivation of mouse neural stem cells as aggregates in serum-free stirred bioreactors.
  • Expansion of mouse embryonic stem cells as aggregates and on microcarriers in stirred vessels.
  • Scale-up of mouse embryonic stem cell embryoid body formation and expansion in instrumented bioreactors.

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Main Results:

  • Human mesenchymal stem cells in perfused scaffolds maintained multi-lineage potential.
  • Mouse neural stem cells were expanded for 44 days in stirred bioreactors.
  • Mouse embryonic stem cells retained stem cell markers and embryoid body formation capacity after expansion.
  • Successful scale-up of embryoid body processes in controlled 2-L bioreactors.

Conclusions:

  • Bioreactor technology is enabling reproducible, large-scale stem cell production.
  • Methods discussed maintain critical stem cell properties for therapeutic use.
  • Progress supports the clinical translation of stem cell-based therapies.