To investigate whether ML210 affects LKB1-regulated ferroptosis signaling in RA FLSs, cells were treated with ML210 for 3, 6, or 18 h and measured the levels of GPX4, SLC7A11, and total and phosphorylated LKB1 and AMPKα (Figure 5A). Here, SLC7A11 is linked to rheumatoid arthritis.