Individual stem cells with highly variable proliferation and self-renewal properties comprise the human hematopoietic stem cell compartment.

Abstract:

:Hematopoiesis requires tight regulation of the hematopoietic stem cell (HSC) population; however, the dynamics of HSC use at steady state are uncertain. Over 3-7 months, we evaluated the repopulation and self-renewal of more than 600 individual human 'severe combined immunodeficiency mouse-repopulating cells' (SRCs), tracked on the basis of lentiviral integration sites, in serially transplanted immune-deficient mice, as well as of SRC daughter cells that migrated to different marrow locations in a single mouse. Our data demonstrate maintenance by self-renewing SRCs after an initial period of clonal instability, a result inconsistent with the clonal succession model. We found wide variation in proliferation kinetics and self-renewal among SRCs, as well as between SRC daughter cells that repopulated equivalently, suggesting that SRC fate is unpredictable before SRCs enter more rigid 'downstream' developmental programs.

journal_name

Nat Immunol

journal_title

Nature immunology

authors

McKenzie JL,Gan OI,Doedens M,Wang JC,Dick JE

doi

10.1038/ni1393

subject

Has Abstract

pub_date

2006-11-01 00:00:00

pages

1225-33

issue

11

eissn

1529-2908

issn

1529-2916

pii

ni1393

journal_volume

7

pub_type

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