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Updated: May 19, 2026
08:14
Immunomagnetic Isolation of the Vascular Wall-Resident CD34+ Stem Cells from Mice
Published on: December 22, 2023
β(2)-Integrin and Notch-1 differentially regulate CD34(+)CD31(+) cell plasticity in vascular niches
Yu-Tsung Shih1, Mei-Cun Wang, Tung-Lin Yang
1Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli 350, Taiwan.
Cardiovascular Research
|August 7, 2012
Summary
Vascular cells like smooth muscle cells and endothelial cells influence hematopoietic stem cells. These stem cells can become blood vessel cells or macrophages, impacting vascular repair and disease.
Area of Science:
- Vascular Biology
- Hematopoiesis
- Cellular Microenvironment
Background:
- Circulating hematopoietic CD34(+) progenitors' role in vasculature is unclear.
- Understanding their plasticity and microenvironment interactions is crucial.
Purpose of the Study:
- Investigate how vascular smooth muscle cells (SMCs) and endothelial cells (ECs) affect CD34(+)CD31(+) progenitor behavior.
- Elucidate the mechanisms of progenitor plasticity within the vascular microenvironment.
Main Methods:
- Transplanted human CD34(+)CD31(+) progenitors into injured mouse arteries in vivo.
- Co-cultured progenitors with ECs and SMCs in vitro.
- Analyzed progenitor differentiation, migration, and adhesion.
Main Results:
- Injected progenitors differentiated into ECs and macrophages in injured arteries.
- SMC co-culture enhanced progenitor mobility, adhesion, and transmigration.
- Progenitors formed capillary-like structures and chimeric vessels.
- Differentiation pathways involved ICAM-1/β(2)-integrin and Jagged-1/Notch-1.
- Activated progenitors inhibited neointima formation.
Conclusions:
- Peripheral vascular niches (ECs and SMCs) influence CD34(+)CD31(+) progenitor differentiation.
- ICAM-1/β(2)-integrin and Jagged-1/Notch-1 cascades mediate EC and macrophage differentiation, respectively.
- This interaction plays a role in vascular repair and disease pathogenesis.
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