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Illustration of the functions that native exosomes exert in osteoarthritis. (A) Cell proliferation and migration. (B) Chondrogenic induction. (C) Anti-inflammation. (D) Apoptosis inhibition and mitochondrial refunction; the yellow arrows indicate mitochondria. [Reproduced with permission from ref 17. Copyright 2018 Elsevier; ref 23. Copyright 2018 TAYLOR & FRANCIS; ref 31. Copyright 2019 Ivyspring International Publisher.].
