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Lineage marker expression on mouse hematopoietic stem cells.

08:00 EDT 9th July 2019 | BioPortfolio

Summary of "Lineage marker expression on mouse hematopoietic stem cells."

Whether hematopoietic stem cells (HSCs) express lineage markers is controversial. In this study, we highly purified HSCs from the adult bone marrow of C57BL/6 mice and examined their gene expression and reconstitution potential. We first focused on the integrin family. Single-cell reverse transcription-polymerase chain reaction showed that the expression of ItgaM/Itgb2 (Mac-1) and Itga2b/Itgb3 (CD41/CD61) gradually increased along HSC differentiation while Itga4, Itga5, Itga6, and ItgaV (CD51) together with Itgb1 were highly expressed in both HSCs and hematopoietic progenitor cells (HPCs). We next fractionated HSCs, based on the expression of Mac-1, CD41, and CD51, by flow cytometry. We detected Mac-negative and -low, but not -high cells in the HSC population. We also detected CD41-negative, -low and -high cells in the HSC population. Competitive repopulation showed that Mac-1-negative and -low HSCs were functionally similar, and CD41-negative and -low HSCs were functionally similar, at the single-cell level, but CD41-high HSCs were not detectable. We then showed that the selection of Mac-1-negative HSCs or CD41-negative HSCs had no advantage in HSC purification. We moreover found that HSCs expressed CD51 more than CD41 while HPCs expressed CD41 more than CD51, suggesting that CD51 expression was gradually replaced by CD41 expression during megakaryocyte differentiation. We concluded that low levels of Mac-1 and CD41 expression are irrelevant to the self-renewal and differentiation potentials in HSCs.

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This article was published in the following journal.

Name: Experimental hematology
ISSN: 1873-2399
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