Journal
JOURNAL OF CLINICAL INVESTIGATION
Volume 106, Issue 11, Pages 1331-1339Publisher
AMER SOC CLINICAL INVESTIGATION INC
DOI: 10.1172/JCI10329
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- NIDCR NIH HHS [DE-11283] Funding Source: Medline
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The chemokine stromal-derived factor-1 (SDF-1) controls many aspects of stem cell function. Details of its regulation and sites of production are currently unknown. We report that in the bone marrow, SDF-1 is produced mainly by immature osteoblasts and endothelial cells. Conditioning with DNA-damaging agents (ionizing irradiation, cyclophosphamide, and 5-fluorouracil) caused an increase in SDF-1 expression and in CXCR4-dependent homing and repopulation by human stem cells transplanted into NOD/SCID mice. Our findings suggest that immature osteoblasts and endothelial cells control stem cell homing, retention, and repopulation by secreting SDF-1, which also participates in host defense responses to DNA damage.
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