GPX4 and neoplasm: The System Xc–/GSH/GPX4 axis, DHODH–ubiquinol (CoQH2) system, FSP1–CoQ10 axis, GTP cyclohydrolase-1 (GCH1)–tetrahydrobiopterin (BH4) axis, and sex hormones can inhibit ferroptosis, and the inhibition of related molecular pathways is an important strategy to induce ferroptosis in tumor cells (45).