Open AccessEvaluation of the Long‐Term Reconstituting Subset of Hematopoietic Stem Cells with CD150
Author(s) -
Papathanasiou Peter,
Attema Joanne L.,
Karsunky Holger,
Xu Jian,
Smale Stephen T.,
Weissman Irving L.
Publication year - 2009
Publication title -
stem cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.159
H-Index - 229
eISSN - 1549-4918
pISSN - 1066-5099
DOI - 10.1002/stem.170
Subject(s) - biology , stem cell , haematopoiesis , bone marrow , hematopoietic stem cell , microbiology and biotechnology , immunology
Blood is a tissue with a high cell turnover rate that is constantly being replenished by bone marrow hematopoietic stem cells (HSCs) seeded during fetal ontogeny from the liver. Here we show that the long‐term (LT) reconstituting subset of cKit + Thy1.1(lo)Lin(−/lo)Sca1 + Flk2 − HSCs is CD150 + . HSCs sourced from the fetal liver show LT, multilineage engraftment from E14.5 onward, and the CD150 cell surface molecule can readily substitute Thy1.1 as a positive marker of LT‐HSCs in this tissue. From both fetal liver and adult bone marrow, cKit + Thy1.1(lo)Lin(−/lo)Sca1 + Flk2 − CD150 + cells exhibit robust LT competitive engraftment, self‐renewal, multilineage differentiation capacity, and an accessible chromatin configuration consistent with high expression of erythroid/megakaryoid genes in purified cell subsets. Our data show that, with appropriate combinations of cell surface markers, stem cells can be accurately isolated to high purity and characterized. This is important for the clarification of lineage relationships and the identification of bona fide regulators of stem cell self‐renewal and differentiation both in normal and neoplastic tissues. STEM CELLS 2009;27:2498–2508