IL6 and rheumatoid arthritis: Suppression of the migratory capacity of RA FLSsDownregulation of the mRNA expression of IL-1β, IL-6, IL-8 and IL-17A in TNF-α-induced RA FLSsDecrease in TNF-α-induced activation of NF-κB signal pathway (phosphorylated NF-κB, IκBα and IKK) and the NF-κB nuclear accumulationInhibitory effect of NF-κB PDTC on the formation of actin stress fibers and actin cytoskeleton score of RA FLSsAttenuation of synovitis, synovial hyperplasia and invasion into calcified cartilage and bone in CIA mice