A20 (TNFAIP3) deficiency in myeloid cells triggers erosive polyarthritis resembling rheumatoid arthritis

Geert van Loo, Rudi Beyaert, Dirk Elewaut and colleagues report that myeloid-specific deletion of Tnfaip3 in mice causes spontaneous destructive polyarthritis that resembles rheumatoid arthritis. Tnfaip3 encodes the A20 protein, which is involved in negative regulation of NF-κB signaling in response to proinflammatory stimuli.