In addition, the levels of Fe2+, iron, and ROS were enhanced by miR-545-3p mimic, while SLC7A11 overexpression reversed this effect in FTC133 and TPC-1 cells (Figures 6B–D), suggesting that miR-545-3p contributes to ferroptosis of thyroid cancer cells by targeting SLC7A11. This evidence concerns the gene SLC7A11 and thyroid cancer.