Cell senescence leads to changes in the secretory activity of mesenchymal stem cells (MSC), including proteins of extracellular matrix (ECM). Here we studied the regulatory properties of ECM of senescent MSC in a model with endothelial cells (EC). EC were seeded onto a decellularized extracellular matrix of senescent MSC. Changes in cell morphology and a decrease in cell growth were observed. In addition, increased production of inflammatory chemokines MCP-1 and GROα and reduced synthesis of proangiogenic growth factor FGF-2 were revealed. Analysis of ECM showed quantitative and qualitative changes, including fibronectin layer morphology, total protein content, and concentration of deposited growth factors such as VEGF. Thus, our work demonstrates that senescence of MSC can lead to modification of the effects of their ECM on EC activity.
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