**4. MSCs: biological properties**

MSCs are well known for their ability to differentiate into numerous cell lineages, but, besides their cell multipotential reprogramming capacity, they promise to be an effective candidate therapy in clinical trials for different human pathologies due to their successful homing, immunomodulation, and tissue repairing [27]. Moreover, exosomes from MSCs are being considered the most important factor of the therapeutic effects of MSCs as they could be used as molecule exchangers and natural drug delivery vehicles [28].
