MMP1 and rheumatoid arthritis: Since proinflammatory cytokines and MMPs contribute to synovial inflammation and joint damage in RA patients, we examined the impact of Myr on the expression of IL-1β, IL-6, IL-8, CCL2, MMP-1, MMP-3, MMP-9, and MMP-13 in RA FLSs through RT-qPCR.