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Identification of Flt3(+) lympho-myeloid stem cells lacking erythro-megakaryocytic potential: A revised road map for adult blood lineage commitment
Lund University.
Lund University.
Lund University.
Lund University.
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2005 (English)In: Cell, ISSN 0092-8674, E-ISSN 1097-4172, Vol. 121, no 2, 295-306 p.Article in journal (Refereed) Published
Abstract [en]

All blood cell lineages derive from a common hematopoietic stem cell (HSC). The current model implicates that the first lineage commitment step of adult pluripotent HSCs results in a strict separation into common lymphoid and common myeloid precursors. We present evidence for a population of cells which, although sustaining a high proliferative and combined lympho-myeloid differentiation potential, have lost the ability to adopt erythroid and megakaryocyte lineage fates. Cells in the Lin-Sca-1+c-kit+ HSC compartment coexpressing high levels of the tyrosine kinase receptor Flt3 sustain granulocyte, monocyte, and B and T cell potentials but in contrast to Lin-Sca-1(+)ckit(+)Flt3(-) HSCs fail to produce significant erythroid and megakaryocytic progeny. This distinct lineage restriction site is accompanied by downregulation of genes for regulators of erythroid and megakaryocyte development. In agreement with representing a lymphoid primed progenitor, Lin(-)Sca-l(+)c-kit(+)CD34(+)Flt3(+) cells display upregulated IL-7 receptor gene expression. Based on these observations, we propose a revised road map for adult blood lineage development.

Place, publisher, year, edition, pages
Elsevier (Cell Press) , 2005. Vol. 121, no 2, 295-306 p.
National Category
Engineering and Technology
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URN: urn:nbn:se:liu:diva-74453DOI: 10.1016/j.cell.2005.02.013ISI: 000228705000016OAI: oai:DiVA.org:liu-74453DiVA: diva2:484796
Available from: 2012-01-27 Created: 2012-01-27 Last updated: 2017-12-08

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Sigvardsson, Mikael

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