Niu et al. discovered that emodin-8-glucoside (EG), a compound derived from Rheum palmatum, induces ferroptosis in gastric cancer cells, suppressing their proliferation and metastasis by alleviating the inhibitory effect of miR103a3p on phospho-activated glutaminase 2 (GLS2) (Niu et al., 2019). This evidence concerns the gene GLS2 and gastric cancer.