Human embryonic stem cell-derived hematoendothelial progenitors engraft chicken embryos

Exp Hematol. 2009 Jan;37(1):31-41. doi: 10.1016/j.exphem.2008.08.007. Epub 2008 Oct 26.


Objective: To investigate whether human embryonic stem cells (hESC) committed in culture into hematopoietic/endothelial cell progenitors can be further developed into mature blood and vascular cells following transplantation into chicken embryos.

Materials and methods: The yolk sac of 42- to 44-hour chicken embryos received yolk sac injections of unfractionated human embryoid body (hEB) cells, CD34-positive hEB cells, or CD34+CD45+ granulocyte colony-stimulating factor-mobilized human peripheral blood hematopoietic stem-progenitor cells. Human cells in the host were detected by flow cytometry and immunohistochemistry.

Results: All injected cell populations engrafted chicken hematopoietic organs, as assessed by detection of CD45+ cells in the spleen, bursa of Fabricius, and thymus. CD34+ day -10 hEB cells showed the highest efficiency for producing human CD45+ cells in the hosts and yielded human glycophorin A+ erythroid, CD13+ myeloid, and CD19+ lymphoid cells in the spleen and bursa of Fabricius. Spleen cells from chimeric embryos also contained human colony-forming units-granulocyte macrophage, as assessed in methylcellulose colony-forming assays. Human endothelial cells expressing vascular endothelial-cadherin, von Willebrand factor, CD31, and the receptor for the Ulex europaeus lectin were also observed in the yolk sac vasculature following injection of either unfractionated or CD34+ day -10 hEB cells.

Conclusion: Primitive angiohematopoietic stem cells (total and CD34+ day -10 hEB cells) as well as adult hematopoietic stem cells could home to intraembryonic blood-forming organs following injection into the yolk sac. These observations demonstrate the utility of the avian embryo as a convenient and reliable host to model the angiohematopoietic development of human embryonic, or other early stem cells.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antigens, Differentiation / biosynthesis*
  • Cell Line
  • Chick Embryo
  • Embryonic Stem Cells / cytology
  • Embryonic Stem Cells / metabolism*
  • Endothelial Cells / cytology
  • Endothelial Cells / metabolism*
  • Graft Survival / physiology*
  • Hematopoietic Stem Cells / cytology
  • Hematopoietic Stem Cells / metabolism*
  • Humans
  • Stem Cell Transplantation*
  • Transplantation, Heterologous
  • Yolk Sac / cytology
  • Yolk Sac / metabolism


  • Antigens, Differentiation