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ABSTRACT Hematopoietic stem cells in the bone marrow (BM) give rise to all blood cells. According to the classic model of hematopoiesis, the differentiation paths leading to the myeloid and
lymphoid lineages segregate early. A candidate ‘common lymphoid progenitor’ (CLP) has been isolated from CD34+CD38− human cord blood cells based on CD7 expression. Here, we confirm the B-
and NK-differentiation potential of CD34+CD38−CD7+ cells and show in addition that this population has strong capacity to differentiate into T cells. As CD34+CD38−CD7+ cells are virtually
devoid of myeloid differentiation potential, these cells represent true CLPs. To unravel the molecular mechanisms underlying lymphoid commitment, we performed genome-wide gene expression
profiling on sorted CD34+CD38−CD7+ and CD34+CD38−CD7− cells. Interestingly, lymphoid-affiliated genes were mainly upregulated in the CD7+ population, while myeloid-specific genes were
downregulated. This supports the hypothesis that lineage commitment is accompanied by the shutdown of inappropriate gene expression and the upregulation of lineage-specific genes. In
addition, we identified several highly expressed genes that have not been described in hematopoiesis before. Access through your institution Buy or subscribe This is a preview of
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references ACKNOWLEDGEMENTS We thank the staff of the Bloedtransfusiecentrum Oost-Vlaanderen for the supply of umbilical cord blood samples and Marie-José De Bosscher for lymphoprepping. We
are grateful to Dick De Ridder for help with microarray analysis and to Inge Van de Walle for excellent technical assistance. This work was supported by grants from the Fund for Scientific
Research Flanders (Belgium) and from the Ghent University concerted research program. AUTHOR INFORMATION Author notes * I Hoebeke Present address: I Hoebeke, Diabetes Research Center,
Brussels Free University (VUB), Laarbeeklaan 103, B-1090, Brussels, Belgium * F Stolz Present address: Laboratory of Molecular Cell Biology, Institute of Botany and Microbiology, Katholieke
Universiteit Leuven, AUTHORS AND AFFILIATIONS * Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, Ghent, Belgium I Hoebeke, M De Smedt, F Stolz, J
Plum & G Leclercq * Department of Immunology, Erasmus University Medical Center, Rotterdam, The Netherlands K Pike-Overzet & F J T Staal * Department of Molecular Microbiology,
Flanders Interuniversity Institute of Biotechnology (VIB), Leuven, Belgium F Stolz Authors * I Hoebeke View author publications You can also search for this author inPubMed Google Scholar *
M De Smedt View author publications You can also search for this author inPubMed Google Scholar * F Stolz View author publications You can also search for this author inPubMed Google Scholar
* K Pike-Overzet View author publications You can also search for this author inPubMed Google Scholar * F J T Staal View author publications You can also search for this author inPubMed
Google Scholar * J Plum View author publications You can also search for this author inPubMed Google Scholar * G Leclercq View author publications You can also search for this author
inPubMed Google Scholar CORRESPONDING AUTHOR Correspondence to G Leclercq. ADDITIONAL INFORMATION Supplementary Information accompanies the paper on the Leukemia website
(http://www.nature.com/leu) SUPPLEMENTARY INFORMATION SUPPLEMENTARY TABLE S1 (DOC 299 KB) SUPPLEMENTARY TABLES S2 (DOC 191 KB) SUPPLEMENTARY TABLES S3 (DOC 203 KB) SUPPLEMENTARY REFERENCES
CITED IN TABLES S2 AND S3 (DOC 106 KB) SUPPLEMENTARY TABLE S4 (DOC 22 KB) SUPPLEMENTARY TABLE S5 (DOC 75 KB) RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS
ARTICLE Hoebeke, I., De Smedt, M., Stolz, F. _et al._ T-, B- and NK-lymphoid, but not myeloid cells arise from human CD34+CD38−CD7+ common lymphoid progenitors expressing lymphoid-specific
genes. _Leukemia_ 21, 311–319 (2007). https://doi.org/10.1038/sj.leu.2404488 Download citation * Received: 31 August 2006 * Accepted: 19 October 2006 * Published: 14 December 2006 * Issue
Date: 01 February 2007 * DOI: https://doi.org/10.1038/sj.leu.2404488 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry,
a shareable link is not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative KEYWORDS * human * hematopoiesis * stem
cells * cord blood * lymphoid progenitor