Fig. 2.
Clinical and preclinical evidence of mesenchymal stromal cell mechanisms of action on immunomodulation and chondroprotection in knee osteoarthritis. Solid arrows are used to demonstrate mechanisms for which there is supporting clinical evidence: dashed arrows indicate the relationship between immunomodulatory and chondroprotective mechanisms supported by preclinical evidence. MSC mesenchymal stromal cell, CQAs critical quality attributes, OA osteoarthritis