Significantly positive relationships were observed between the gene expressions of ACACA-PPARA, ACADVL-INSR, ACADVL-PPARA in RA cases (Figures 3B–D), but gene expressions of ACADM-ACADVL, ACADM-INSR, ACADM-SREBF1, CD36-FASN in RA cases showed significantly negative relationships (Figures 3E–H). Here, FASN is linked to rheumatoid arthritis.