FRAT1 and rheumatoid arthritis: Increased expression of lncRNA RP11-83J16.1 in FLSs from RA patients has been identified, which could regulate the levels of the frequently rearranged in advanced T cell lymphomas-1 (FRAT1) and β-catenin expression and thus promote cell proliferation, migration, invasion, and decreased apoptosis in RA-FLS (124).