Journals Arteriosclerosis, Thrombosis, and Vascular Biology

Arteriosclerosis, Thrombosis, and Vascular Biology
Vascular biology
Proteolytic enzymes
Vascular muscle
Extracellular matrix
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 α-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).
Lippincott‎ & Williams Company
Journal type
Open Access

Journals Publications

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Issue DateTitleAuthor(s)
1Jul-2010Comparative proteomics profiling reveals role of smooth muscle progenitors in extracellular matrix productionSimper, David ; Mayr, Ursula ; Urbich, Carmen ; Zampetaki, Anna ; Prokopi, Marianna ; Didangelos, Athanasios ; Saje, Angelika ; Mueller, Michael ; Benbow, Ulrike ; Newby, Andrew C ; Apweiler, Rolf ; Rahman, Salman ; Dimmeler, Stefanie ; Xu, Qingbo ; Mayr, Manuel