We warmly congratulate our colleagues on their new paper on an animal model of rheumatoid arthritis (RA), which is important for studying this disease. Mice with collagen-induced arthritis (CIA) show sleep disturbances similar to those in patients with RA, along with broader deficits including poorer memory, increased anxiety and limited social interactions, some of which are sex-specific. This highlights the translational potential of the CIA model and enables the preclinical setting to more accurately reflect disease manifestations in patients with RA.