Disclosed is the use of a composition comprising a TET pathway inhibitor and a
ferroptosis inducer in the manufacture of a medicament for the treatment of malignant tumors. It is found that TET1 up-regulates expression of a
ferroptosis key regulation
gene GCH1 through an NF [kappa] B
signal, promotes synthesis of BH4, activates a GPX4 non-dependent pathway, and plays a key hub role in controlling
ferroptosis sensitivity. Through
combined use of TET pathway inhibitors (including a TET inhibitor and a BH4 synthesis inhibitor), the sensitivity of
tumor cells to the ferroptosis
inducer can be significantly improved, and the in-vivo use dosage of the ferroptosis
inducer is reduced to 1% (1 mg / kg) of the
conventional treatment dosage. The composition of the TET pathway inhibitor and the ferroptosis inducer, provided by the invention, can be used for remarkably improving the ferroptosis induction
curative effect of various malignant tumors, particularly ferroptosis insensitive tumors, and enhancing the safety and universality of ferroptosis
induction treatment.