CXCL8 and rheumatoid arthritis: miR-17-92 was down-regulated in activated fibroblast-like synoviocytes (FLS) isolated from RA patients (RAFLS), miR-19b-1 enhanced basal IL6 and IL8 secretion by RAFLS to increase basal inflammation, and miR-19a and miR-19b-1 regulate IL6 and MMP-3 release by controlling TLR2 expression4, 5, 11.