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Embryonic Stem Cells00:57

Embryonic Stem Cells

Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...

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A human embryonic stem cell line adapted for high throughput screening.

Nicolas J Caron1, Blair K Gage, Michael D O'Connor

  • 1Michael Smith Laboratories and Chemical & Biological Engineering, University of British Columbia, 2185 East Mall, Vancouver, British Columbia, Canada V6T 1Z4.

Biotechnology and Bioengineering
|April 25, 2013
PubMed
Summary
This summary is machine-generated.

A new human embryonic stem cell (hESC) subline, CA1S, offers high cloning efficiency and reduced variability for stem cell differentiation. This advance simplifies optimizing protocols for generating therapeutic cell types.

Keywords:
cell culturehigh-throughput screeninghuman embryonic stem cellspancreatic differentiation

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Area of Science:

  • Stem cell biology
  • Developmental biology
  • Genomics

Background:

  • Human embryonic stem cells (hESCs) hold therapeutic promise but optimizing differentiation is challenging due to high culture variability.
  • Variability in hESC cultures limits efficient generation of specific cell types for therapeutic applications.

Purpose of the Study:

  • To isolate and characterize a novel hESC subline with improved expansion and reduced differentiation variability.
  • To assess the utility of this new subline in high-throughput screening for optimizing differentiation protocols.

Main Methods:

  • Isolation and characterization of the CA1S hESC subline, including genomic analysis and cloning efficiency assessment.
  • Evaluation of CA1S cell expansion, well-to-well variation, and differentiation capacity into pancreatic progenitors and definitive endoderm.
  • High-performance screening for definitive endoderm induction, including proliferative index measurements.

Main Results:

  • The CA1S subline exhibits a 25% cloning efficiency and significantly reduced well-to-well variation compared to parental hESCs.
  • CA1S cells can be rapidly expanded (10^8 cells/week) and efficiently differentiate, requiring no WNT3A for definitive endoderm formation.
  • High-throughput screening using CA1S cells identified key factors for definitive endoderm induction and demonstrated rapid reflection of differentiation status via proliferative index.

Conclusions:

  • The CA1S hESC subline offers a robust model for optimizing stem cell growth and differentiation protocols due to its high yield and low variability.
  • This subline facilitates high-throughput screening, reducing the complexity of optimizing differentiation for therapeutic cell generation.
  • CA1S cells streamline research by minimizing arduous secondary screening steps, accelerating the development of clinical applications for hESC-derived cells.