Differentiation of multipotent vascular stem cells contributes to vascular diseases

Zhenyu Tang, Aijun Wang, Falei Yuan, Zhiqiang Yan, Bo Liu, Julia S. Chu, Jill A. Helms and Song Li ()
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Zhenyu Tang: University of California
Aijun Wang: University of California
Falei Yuan: University of California
Zhiqiang Yan: University of California
Bo Liu: Stanford University
Julia S. Chu: University of California
Jill A. Helms: Stanford University
Song Li: University of California

Nature Communications, 2012, vol. 3, issue 1, 1-13

Abstract: Abstract It is generally accepted that the de-differentiation of smooth muscle cells, from the contractile to the proliferative/synthetic phenotype, has an important role during vascular remodelling and diseases. Here we provide evidence that challenges this theory. We identify a new type of stem cell in the blood vessel wall, named multipotent vascular stem cells. Multipotent vascular stem cells express markers, including Sox17, Sox10 and S100β, are cloneable, have telomerase activity, and can differentiate into neural cells and mesenchymal stem cell-like cells that subsequently differentiate into smooth muscle cells. On the other hand, we perform lineage tracing with smooth muscle myosin heavy chain as a marker and find that multipotent vascular stem cells and proliferative or synthetic smooth muscle cells do not arise from the de-differentiation of mature smooth muscle cells. In response to vascular injuries, multipotent vascular stem cells, instead of smooth muscle cells, become proliferative, and differentiate into smooth muscle cells and chondrogenic cells, thus contributing to vascular remodelling and neointimal hyperplasia. These findings support a new hypothesis that the differentiation of multipotent vascular stem cells, rather than the de-differentiation of smooth muscle cells, contributes to vascular remodelling and diseases.

Date: 2012
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DOI: 10.1038/ncomms1867

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