期刊
LEUKEMIA
卷 24, 期 8, 页码 1450-1461出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/leu.2010.121
关键词
VSELs; epiblast; PGCs; CXCR4; epigenetics
资金
- NIH, National Center for Research Resources [P20RR018733]
- NIH [NIH R01 CA106281-01, NIH R01 DK074720]
- European Union
- Innovative Economy Operational Program [POIG.01.01.01-00-109/09-01]
- Henry M and Stella M Hoenig Endowment
We postulated that Oct4(+)SSEA-1(+)Sca-1(+)Lin(-)CD45(-) very small embryonic-like stem cells (VSELs) isolated from adult bone marrow (BM) could be a reserve population for tissue-committed stem cells. The aim of this study was to elucidate the developmental origin of these cells. We report that during embryogenesis, VSELs are enriched in embryonic day (E)12.5 murine fetal livers (FLs) and subsequently follow the developmental route of hematopoietic stem cells (H) SCs to colonize BM. Molecular analysis of purified VSELs revealed that both FL-derived VSELs and their adult BM-derived counterparts express: (i) several epiblast/primordial germ cell (PGC) markers; (ii) migrating PGC-like epigenetic reprogramming profiles of Oct4, Nanog and Stella loci; as well as (iii) a unique pattern of genomic imprinting. Thus, these data suggest that VSELs may originate from epiblast/migrating PGC-like cells and, in spite of the expression of pluripotent stem cell markers, changes in the epigenetic signature of imprinted genes keep these cells quiescent in adult tissues and prevent them from teratoma formation. Leukemia (2010) 24, 1450-1461; doi:10.1038/leu.2010.121; published online 27 May 2010
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