Secretome from mesenchymal stem cells induces angiogenesis via Cyr61 |
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| Authors: | Rosendo Estrada Na Li Harshini Sarojini Jin AN Menq‐Jer Lee Eugenia Wang |
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| Affiliation: | 1. Gheens Center on Aging, University of Louisville School of Medicine, Louisville, Kentucky;2. Department of Microbiology and Immunology, University of Louisville School of Medicine, Louisville, Kentucky;3. Department of Biochemistry and Molecular Biology, University of Louisville School of Medicine, Louisville, Kentucky |
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| Abstract: | It is well known that bone marrow‐derived mesenchymal stem cells (MSCs) are involved in wound healing and regeneration responses. In this study, we globally profiled the proteome of MSCs to investigate critical factor(s) that may promote wound healing. Cysteine‐rich protein 61 (Cyr61) was found to be abundantly present in MSCs. The presence of Cyr61 was confirmed by immunofluorescence staining and immunoblot analysis. Moreover, we showed that Cyr61 is present in the culture medium (secretome) of MSCs. The secretome of MSCs stimulates angiogenic response in vitro, and neovascularization in vivo. Depletion of Cyr61 completely abrogates the angiogenic‐inducing capability of the MSC secretome. Importantly, addition of recombinant Cyr61 polypeptides restores the angiogenic activity of Cyr61‐depleted secretome. Collectively, these data demonstrate that Cyr61 polypeptide in MSC secretome contributes to the angiogenesis‐promoting activity, a key event needed for regeneration and repair of injured tissues. J. Cell. Physiol. 219: 563–571, 2009. © 2009 Wiley‐Liss, Inc. |
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