Enhanced purification of fetal liver hematopoietic stem cells using SLAM family receptors.
Although adult mouse hematopoietic stem cells (HSCs) have been purified to near homogeneity, it remains impossible to achieve this with fetal HSCs. Adult HSC purity recently has been enhanced using the SLAM family receptors CD150, CD244, and CD48. These markers are expressed at different stages of the hematopoiesis hierarchy, making it possible to highly purify adult HSCs as CD150(+)CD48(-)CD244(-) cells. We found that SLAM family receptors exhibited a similar expression pattern in fetal liver. Fetal liver HSCs were CD150(+)CD48(-)CD244(-), and the vast majority of colony-forming progenitors were CD48(+)CD244(-)CD150(-) or CD48(+)CD244(+)CD150(-), just as in adult bone marrow. SLAM family markers enhanced the purification of fetal liver HSCs. Whereas 1 (11%) of every 8.9 Thy(low)Sca-1(+)lineage(-)Mac-1(+) fetal liver cells gave long-term multilineage reconstitution in irradiated mice, 1 (18%) of every 5.7 CD150(+)CD48(-)CD41(-) cells and 1 (37%) of every 2.7 CD150(+)CD48(-)Sca-1(+)lineage(-)Mac-1(+) fetal liver cells gave long-term multilineage reconstitution. These data emphasize the robustness with which SLAM family markers distinguish progenitors at different stages of the hematopoiesis hierarchy and enhance the purification of definitive HSCs from diverse contexts. Nonetheless, CD150, CD244, and CD48 are not pan-stem cell markers, as they were not detectably expressed by stem cells in the fetal or adult nervous system.
Howard Hughes Medical Institute, Life Sciences Institute, Department of Internal Medicine, University of Michigan, Ann Arbor, USA.
Injune
I
Kim
Shenghui
S
He
Omer H
OH
Yilmaz
Mark J
MJ
Kiel
Sean J
SJ
Morrison
D000818:Animals; D015703:Antigens, CD / Q000032:analysis*; D000071178:CD48 Antigen; D002469:Cell Separation / Q000379:methods*; D005333:Fetus / Q000166:cytology; D006023:Glycoproteins / Q000032:analysis; D006085:Graft Survival; D018380:Hematopoietic Stem Cell Transplantation; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D007136:Immunoglobulins / Q000032:analysis; D016130:Immunophenotyping; D008099:Liver / Q000166:cytology; D008562:Membrane Glycoproteins / Q000032:analysis; D051379:Mice; D008810:Mice, Inbred C57BL; D011956:Receptors, Cell Surface; D011971:Receptors, Immunologic / Q000032:analysis*; D000071176:Signaling Lymphocytic Activation Molecule Family; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1
D015703:Antigens, CD; D000071178:CD48 Antigen; C490007:Cd244a protein, mouse; C000604066:Cd48 protein, mouse; D006023:Glycoproteins; D007136:Immunoglobulins; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D011971:Receptors, Immunologic; D000071176:Signaling Lymphocytic Activation Molecule Family; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1