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Updated: May 5, 2026

Analysis of Physiologic E-Selectin-Mediated Leukocyte Rolling on Microvascular Endothelium
Published on: February 11, 2009
Waking up HSCs: a new role for E-selectin.
1Cell Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY, USA. m-moore@ski.mskcc.org
Hematopoietic stem cells (HSCs) reside in two bone marrow niches. Researchers discovered that E-selectin on endothelial cells in the vascular niche promotes HSC proliferation, clarifying niche function.
Area of Science:
- Hematology
- Cell Biology
- Stem Cell Biology
Background:
- Two distinct anatomical niches for hematopoietic stem cells (HSCs) exist in the bone marrow.
- The specific functions of these HSC niches remain incompletely understood.
Purpose of the Study:
- To elucidate the distinct functions of bone marrow hematopoietic stem cell niches.
- To investigate the role of the vascular niche in HSC regulation.
Main Methods:
- Analysis of E-selectin expression by bone marrow endothelial cells.
- Assessment of HSC proliferation in relation to the vascular niche.
Main Results:
- The adhesion molecule E-selectin is expressed by endothelial cells within the bone marrow's vascular niche.
- E-selectin expression in the vascular niche was identified as a key factor promoting hematopoietic stem cell proliferation.
Conclusions:
- The vascular niche plays a distinct role in regulating hematopoietic stem cell proliferation.
- E-selectin is a crucial mediator of HSC function within the vascular niche.
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