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Pan-myeloid Differentiation of Human Cord Blood Derived CD34+ Hematopoietic Stem and Progenitor Cells

Pan-myeloid Differentiation of Human Cord Blood Derived CD34⁺ Hematopoietic Stem and Progenitor Cells

Published on: August 9, 2019

CD61 enriches long-term repopulating hematopoietic stem cells.

Terumasa Umemoto¹, Masayuki Yamato, Yoshiko Shiratsuchi

¹Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.

Biochemical and Biophysical Research Communications

|November 7, 2007

Summary

High expression of CD61 (integrin beta3) identifies long-term repopulating hematopoietic stem cells (LTR-HSCs) within the CD34-KSL cell population in mouse bone marrow, aiding HSC enrichment.

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Area of Science:

Hematology
Stem Cell Biology
Immunology

Background:

Hematopoietic stem cells (HSCs) are crucial for blood cell formation.
The CD34-KSL (CD34-negative, c-kit-positive, Sca-1-positive, lineage marker-negative) cell population is enriched for HSCs in adult mouse bone marrow.
Identifying more specific markers for HSC enrichment is essential.

Purpose of the Study:

To investigate the expression of CD61 (integrin beta3) on HSCs within the CD34-KSL population.
To determine if CD61 expression can be used to further enrich for long-term repopulating HSCs (LTR-HSCs).

Main Methods:

Flow cytometry was used to analyze cell surface marker expression on mouse bone marrow cells.
CD34-KSL cells were isolated and further analyzed for CD61 expression.
Functional assays, including long-term repopulation studies, were performed on sorted cell populations.

Main Results:

Approximately 60% of CD34-KSL cells exhibited high CD61 expression.
The CD61HighCD34-KSL population showed enhanced HSC properties, including marker expression and side population (SP) phenotype.
CD61HighCD34-KSL cells contained significantly more LTR-HSCs compared to CD61Low/-CD34-KSL cells, in both SP and non-SP fractions.

Conclusions:

CD61 is a promising cell surface marker for the positive enrichment of LTR-HSCs.
Utilizing CD61 in conjunction with CD34-KSL can improve the isolation efficiency of HSCs.