期刊
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
卷 30, 期 7, 页码 1325-U127出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/ATVBAHA.110.204651
关键词
angiogenesis; extracellular matrix; proteolytic enzymes; vascular biology; vascular muscle; proteomics
资金
- European Vascular Genomics Network [LSHM-CT-2003-503254]
- British Heart Foundation
- Oak Foundation
- Juvenile Diabetes Research Foundation
- British Heart Foundation [FS/08/002/24537] Funding Source: researchfish
Objective-Recent studies on cardiovascular progenitors have led to a new appreciation that paracrine factors may support the regeneration of damaged tissues. Methods and Results-We used a shotgun proteomics strategy to compare the secretome of peripheral blood-derived smooth muscle progenitors (SPCs) with human aortic smooth muscle cells. The late-outgrowth SPCs produced fewer proteolytic enzymes and inflammatory cytokines and showed reduced invasive capacity. Similar to smooth muscle cells, SPCs secreted extracellular matrix. However, SPCs produced different matrix proteins, as evidenced by the truncation of proangiogenic domains in collagen alpha-1 (I) and increased production of periostin. Moreover, SPCs retained serum proteins, including proteoglycans, regulating collagen assembly; and pigment epithelium-derived factor, a potent inhibitor of angiogenesis. As a functional consequence, their conditioned medium was less angiogenic, as demonstrated by endothelial tube formation assays in vitro and implantation of Matrigel plugs into nude, severe combined immunodeficient mice (NOD/SCID). Conclusion-The present study represents an important conceptual development, suggesting that SPCs may contribute to extracellular matrix production. (Arterioscler Thromb Vasc Biol. 2010; 30: 1325-1332.)
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