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Feeder layer and serum independent embryonic stem cells

  • US 7,641,897 B2
  • Filed: 11/23/2005
  • Issued: 01/05/2010
  • Est. Priority Date: 11/23/2004
  • Status: Expired due to Fees
First Claim
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1. A method of expanding mouse undifferentiated embryonic stem cells in the absence of feeder layer cells and the presence of leukemia inhibitory factor (LIF), the method comprising:

  • introducing into said stem cells a genetic construct encoding Bcl-2 operably linked to a promoter active in said cells; and

    expanding said mouse undifferentiated embryonic stem cells in a medium free of feeder layer cells and serum, in the presence of LIF, for at least three weeks, while maintaining differentiative capacity.

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