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Updated: Feb 12, 2026

Clonal Analysis of Embryonic Hematopoietic Stem Cell Precursors Using Single Cell Index Sorting Combined with Endothelial Cell Niche Co-culture
Published on: May 8, 2018
Large-Scale Clonal Analysis Resolves Aging of the Mouse Hematopoietic Stem Cell Compartment.
Ryo Yamamoto1, Adam C Wilkinson2, Jun Ooehara3
1Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Lorry I. Lokey Stem Cell Research Building, 265 Campus Drive, Stanford, CA, USA; Department of Genetics, Stanford University, Stanford, CA, USA; Division of Stem Cell Therapy, Center for Stem Cell Biology and Regeneration Medicine, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan.
Aging dramatically increases myeloid-restricted repopulating progenitors (MyRPs) and reveals latent hematopoietic stem cells (HSCs) in mice. These findings challenge traditional views of HSC aging and function.
Area of Science:
- Hematology
- Stem Cell Biology
- Gerontology
Background:
- Aging leads to functional decline and blood disorders.
- Hematopoietic stem cells (HSCs) maintain the blood system.
- HSC dysfunction is implicated in age-related blood perturbations.
Purpose of the Study:
- To investigate age-related functional changes in the HSC compartment.
- To quantify the frequency of myeloid-restricted repopulating progenitors (MyRPs) and multipotent HSCs in aged mice.
- To identify novel cell populations within the aged HSC compartment.
Main Methods:
- Over 400 single-cell transplantation assays were performed.
- Analysis included five blood-lineage tracing in primary and secondary recipients.
- Phenotypic and functional characterization of HSCs and progenitors.
Main Results:
- MyRP frequency significantly increased with age in the HSC compartment.
- Multipotent HSCs showed modest expansion in aged bone marrow.
- A novel cell type, 'latent-HSCs,' was identified, exhibiting myeloid restriction in primary but multipotency in secondary recipients.
Conclusions:
- The frequency and function of HSCs change significantly with age.
- Latent-HSCs, exclusive to aged mice, represent a newly identified functional cell state.
- These findings necessitate a re-evaluation of HSC aging paradigms and current assay methodologies.
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