MDM2 and rheumatoid arthritis: LncRNA Nuclear Enriched Abundant Transcript 1 (NEAT1) sponges miR‐410‐3p, which negatively regulates YY1 in RA‐FLSs,134 and sponges miR‐23a, which negatively regulates the murine double minute‐2 (MDM2)–sirtuin 6 (SIRT6) axis in RA‐PBMCs.135