CXCR2 and Miyoshi myopathy: MSCs in the bone marrow produce factors such as CCL4/MIP-1β, IL-6, and CXCR2 ligands CXCL1, CXCL5, CXCL6, and CXCL8/IL-8 [103,104], which is associated with the transfer of miR-146a by MM via exosomes to MSCs [105].