| |
|
|
|
|
|
|
|||
|
Blood, 1 March 2006, Vol. 107, No. 5, pp. 2180-2183. Prepublished online as a Blood First Edition Paper on November 8, 2005; DOI 10.1182/blood-2005-05-1922.
Submitted May 11, 2005
Department of Animal Biotechnology, University of Nevada, Reno, NV, USA * Corresponding author; email: daisy{at}med.unr.edu.
The human/sheep xenograft model has proven valuable in assessing the in vivo hematopoietic activity of stem cells from a variety of fetal and post-natal human sources. CD34+/Lineage- or CD34+/CD38- cells isolated from human embryonic stem (hES) cells differentiated on S17 feeder layer were transplanted by intraperitoneal injections into fetal sheep. Chimerism in primary transplants was established with PCR and flowcytometry of bone marrow and peripheral blood samples. Whole bone marrow cells harvested from a primary recipient were transplanted into a secondary recipient. Chimerism was established as before. This animal was challenged with human GM-CSF and an increase in human hematopoietic activity was noted by flowcytometry. Bone marrow aspirations cultured in methylcellulose generated colonies identified to be of human origin by PCR. We therefore conclude that hES cells are capable of generating hematopoietic cells that engraft primary recipients. These cells also fulfill the criteria for long-term engrafting hematopoietic stem cells as demonstrated by engraftment and differentiation in the secondary recipient.
This article has been cited by other articles:
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Copyright © 2005 by American Society of Hematology Online ISSN: 1528-0020 | |||||||||