Abstract：
:The lineage restriction of prospectively isolated hematopoietic progenitors has been traditionally assessed by bulk in vitro culture and transplantation of large number of cells in vivo. These methods, however, cannot distinguish between homogenous multipotent or heterogeneous lineage-restricted populations. Using clonal assays of 1 or 5 cells in vitro, single-cell quantitative gene expression analyses, and transplantation of mice with low numbers of cells, we show that a common myeloid progenitor (CMP) is Sca-1(lo)lin(-)c-Kit(+)CD27(+)Flk-2(-) (SL-CMP; Sca-1(lo) CMP) and a granulocyte/macrophage progenitor (GMP) is Sca-1(lo)lin(-)c-Kit(+)CD27(+)Flk-2(+)CD150(-/lo) (SL-GMP; Sca-1(lo) GMP). We found that mast cell progenitor potential is present in the SL-CMP fraction, but not in the more differentiated SL-GMP population, and is more closely related to megakaryocyte/erythrocyte specification. Our data provide criteria for the prospective isolation of SL-CMP and SL-GMP and support the conclusion that mast cells are specified during hematopoiesis earlier than and independently from granulocytes.
journal_name
Cell Stem Celljournal_title
Cell stem cellauthors
Franco CB,Chen CC,Drukker M,Weissman IL,Galli SJdoi
10.1016/j.stem.2010.02.013subject
Has Abstractpub_date
2010-04-02 00:00:00pages
361-8issue
4eissn
1934-5909issn
1875-9777pii
S1934-5909(10)00090-1journal_volume
6pub_type
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