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Pan-myeloid Differentiation of Human Cord Blood Derived CD34+ Hematopoietic Stem and Progenitor Cells
Published on: August 9, 2019
CD34+ cells represent highly functional endothelial progenitor cells in murine bone marrow
Junjie Yang1, Masaaki Ii, Naosuke Kamei
1Group of Vascular Regeneration Research, Institute of Biomedical Research and Innovation/RIKEN Center for Developmental Biology, Kobe, Japan.
Plos One
|June 10, 2011
Summary
Mouse CD34(+) cells are identified as a functional population of endothelial progenitor cells (EPCs) in bone marrow. These cells promote neovascularization and cardiac repair after myocardial infarction, offering therapeutic potential.
Area of Science:
- Stem Cell Biology
- Cardiovascular Research
- Regenerative Medicine
Background:
- Endothelial progenitor cells (EPCs) possess angiogenic potential crucial for neovascularization.
- Identifying specific cell surface markers for mouse EPCs remains a challenge.
- This study investigates CD34 as a marker for functional mouse EPCs.
Purpose of the Study:
- To determine if CD34 can identify and isolate functional EPCs from mouse bone marrow.
- To compare the angiogenic and homing potential of CD34(+) cells with other bone marrow cell populations.
- To assess the therapeutic efficacy of CD34(+) cells in a myocardial infarction model.
Main Methods:
- Isolation of specific cell populations (CD34(+), KSL, KL, SL) from mouse bone marrow mononuclear cells (BMMNCs) via fluorescent activated cell sorting.
- Assessment of EPC colony-forming and endothelial differentiation capacities.
- Analysis of endothelial and homing marker gene expression (vWF, VE-cadherin, Flk-1, Integrin β2, CXCR4).
- In vivo evaluation of cell recruitment, retention, and therapeutic effects in a mouse myocardial infarction model.
Main Results:
- CD34(+) cells exhibited the highest expression of endothelial markers and key homing molecules (Integrin β2, CXCR4).
- Despite lower colony formation, CD34(+) cells showed enhanced adherence and differentiation under endothelial culture.
- Systemic injection of CD34(+) cells led to superior myocardial recruitment, retention, neovascularization, and cardiac functional recovery post-infarction.
- CD34(+) cell treatment significantly reduced cardiac fibrosis.
Conclusions:
- Mouse CD34(+) cells represent a functional EPC population within the bone marrow.
- These findings support the utility of CD34(+) cells for investigating therapeutic EPC biology.
- CD34(+) cells demonstrate significant potential for promoting cardiac repair and regeneration.
