Correction of factor IX deficiency in mice by embryonic stem cells differentiated in vitro

Jeffrey H. Fair, Bruce A. Cairns, Michael A. LaPaglia, Montserrat Caballero, W. Andrew Pleasant, Seigo Hatada, Hyung Suk Kim, Tong Gui, Larysa Pevny, Anthony A. Meyer, Darrel W. Stafford, Oliver Smithies, Jeffrey A. Frelinger

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Murine embryonic stem (ES) cells are pluripotent, but significant functional engraftment does not occur when they are introduced into the liver. However, here we demonstrate that functional liver engraftment does occur if the ES cells (from strain 129 mice) are first differentiated in vitro for 7 days in the presence of FGF. Strikingly, when these differentiated cells, termed putative endodermal precursors (PEPs), were injected into their livers, two of six C57BL/6 and four of eight BALB/c factor IX (F-IX)-deficient mice survived for >7 days, even though the recipients were of a different strain and, in the case of the BALB/c recipients, had a complete MHC mismatch. F-IX was detected in all six of the PEP-injected survivors. Two mice subsequently died of causes unrelated to F-IX; the others survived until death at 38 or 115 days after the transplantation. No uninjected control F-IX-deficient mice survived for >7 days. Large confluent regions of sinusoidal PEP engraftment were demonstrated by immunofluorescence in the long-term BALB/c survivors. The PEP engraftment was not associated with detectable cell fusion, and the transplantation was accompanied with only a low incidence of teratoma formation.

Original languageEnglish (US)
Pages (from-to)2958-2963
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number8
StatePublished - Feb 22 2005
Externally publishedYes


  • Cellular transplantation
  • Gene therapy
  • Hemophilia
  • In vitro differentiation
  • Liver engraftment

ASJC Scopus subject areas

  • General


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