Erythromyeloid progenitors give rise to a population of osteoclasts that contribute to bone homeostasis and repair.
Osteoclasts are multinucleated cells of the monocyte/macrophage lineage that degrade bone. Here, we used lineage tracing studies-labelling cells expressing Cx3cr1, Csf1r or Flt3-to identify the precursors of osteoclasts in mice. We identified an erythromyeloid progenitor (EMP)-derived osteoclast precursor population. Yolk-sac macrophages of EMP origin produced neonatal osteoclasts that can create a space for postnatal bone marrow haematopoiesis. Furthermore, EMPs gave rise to long-lasting osteoclast precursors that contributed to postnatal bone remodelling in both physiological and pathological settings. Our single-cell RNA-sequencing data showed that EMP-derived osteoclast precursors arose independently of the haematopoietic stem cell (HSC) lineage and the data from fate tracking of EMP and HSC lineages indicated the possibility of cell-cell fusion between these two lineages. Cx3cr1+ yolk-sac macrophage descendants resided in the adult spleen, and parabiosis experiments showed that these cells migrated through the bloodstream to the remodelled bone after injury.
Duke Scholars
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- Yolk Sac
- Osteoclasts
- Mice
- Macrophages
- Homeostasis
- Hematopoietic Stem Cells
- Hematopoiesis
- Developmental Biology
- Cell Lineage
- Cell Differentiation
Citation
Published In
DOI
EISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Yolk Sac
- Osteoclasts
- Mice
- Macrophages
- Homeostasis
- Hematopoietic Stem Cells
- Hematopoiesis
- Developmental Biology
- Cell Lineage
- Cell Differentiation