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• W2080554447 abstract "Patients with myocardial infarction reveal an altered number of circulating mesenchymal stem cells (MSCs). Recently, it was shown that MSCs are able to regenerate myocardial tissue and to differentiate into endothelial cells. The homing mechanisms of MSCs from the circulation into the target tissue, however, are not understood so far. In this study, we evaluated the impact of platelets on MSC recruitment, proliferation, migration and integration into the endothelium. MSCs expressing alpha(v)beta(3) integrin were recruited to human arterial endothelial cells exposed to isolated platelets or IL-1 beta under high shear conditions. Furthermore, induction of vascular injury in vivo resulted in increased recruitment of injected MSCs as assessed by intravital microscopy and depletion of platelets significantly reduced this adhesion. The interaction of platelets and MSCs was inhibited by pre-incubation with the mAb 7E3 or an RGD protein both blocking beta(3) integrin mediated adhesion. Platelets had a chemotactic effect on MSCs, promoted a migratory MSC phenotype and dose- and activation-dependently enhanced migration of MSCs, a process, which was mediated by basic fibroblast growth factor (bFGF). Similarly, platelet derived bFGF increased proliferation of MSCs. Coincubation of MSCs with platelets facilitated integration into an endothelial monolayer, which was significantly reduced by pre-incubation with a blocking mAb to bFGF. We conclude that platelets may play a critical part in the recruitment of MSCs to the endothelium, influence MSC function and promote integration of MSCs into the endothelium." @default.
• W2080554447 created "2016-06-24" @default.
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• W2080554447 date "2009-08-01" @default.
• W2080554447 modified "2023-09-27" @default.
• W2080554447 title "Platelet derived bFGF mediates vascular integrative mechanisms of mesenchymal stem cells in vitro" @default.
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• W2080554447 doi "https://doi.org/10.1016/j.yjmcc.2009.03.011" @default.
• W2080554447 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19328809" @default.
• W2080554447 hasPublicationYear "2009" @default.
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