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Homing and transendothelial migration of mesenchymal stromal cells (MSCs). MSCs can act both endogenously or exogenously, performing a homing process, by which they move towards the affected site following chemotactic signals in order to repair or contribute to the recovery of the damaged tissue. bFBF: basic fibroblast growth factor; FGFR: fibroblast growth factor receptors; VLA-4: very late antigen 4; VCAM-1: vascular cell adhesion molecule 1.
