IL10 and rheumatoid arthritis: Moreover, 10−7 M DAA significantly increased IL-10 concentration in OA and RA synoviocytes (OA: 10−7 M p = 0.02, 10−9 M compared to 10−7 M p = 0.29; RA: 10−7 M p = 0.004, 10−9 M compared to 10−7 M p = 0.005) (Figure 4B).