As to endometrial cancer, proteomic analysis indicated that the expressions of GPX4, glutathione synthetase (GSS), ferroptosis suppressor protein 1 (FSP1), and transferring receptor 1 protein (TFRC) were higher in the early-stage endometrial cancer than in the normal tissues (López-Janeiro et al., 2021). The gene discussed is GSS; the disease is endometrial cancer.