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Related Experiment Video

Updated: Jul 17, 2026

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Phenotypic Analysis and Isolation of Murine Hematopoietic Stem Cells and Lineage-committed Progenitors

Published on: July 8, 2012

Two distinct stem cell lineages in murine bone marrow.

Yoko Koide¹, Satoru Morikawa, Yo Mabuchi

¹Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan. penguin@sc.itc.keio.ac.jp

Stem Cells (Dayton, Ohio)

|January 16, 2007

Summary

Hematopoietic stem cells (HSCs) do not differentiate into mesenchymal stem cells (MSCs). Unfractionated bone marrow cells, however, can generate both hematopoietic and mesenchymal lineages, suggesting distinct stem cell origins.

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Area of Science:

Stem cell biology
Hematology
Regenerative medicine

Background:

Mesenchymal stem cells (MSCs) are adult stem cells with therapeutic potential but poorly understood origins and markers.
Their plasticity and therapeutic applications are hindered by low frequency and undefined lineage relationships.

Purpose of the Study:

To investigate the lineage relationship between hematopoietic stem cells (HSCs) and mesenchymal stem cells (MSCs).
To determine if purified HSCs can differentiate into mesenchymal tissues.
To identify specific markers for mesenchymal lineage cells.

Main Methods:

Transplantation of genetically marked HSCs into wild-type animals.
In vitro differentiation assays of hematopoietic cells into mesenchymal tissues.
In vivo microimaging and immunohistochemistry for visualizing mesenchymal cells.
Flow cytometric analysis using CD140b (PDGFRbeta) as a potential marker.

Main Results:

Purified HSCs showed minimal to no contribution to mesenchymal cell differentiation or colony-forming unit fibroblast activity.
Unfractionated bone marrow cells effectively generated both hematopoietic and mesenchymal cells, including MSCs.
CD140b (PDGFRbeta) was identified as a potential specific marker for mesenchymal lineage cells.

Conclusions:

Hematopoietic stem cells (HSCs) lack significant potency to differentiate into the mesenchymal lineage.
Hematopoietic and mesenchymal lineages likely originate from distinct, lineage-specific stem cells.
Further research into MSC identity and characteristics is crucial, with CD140b as a potential marker.