In mouse models, the team introduced combined therapy including PD-L1 blocker and cyst(e) inase (a bioengineered enzyme that degrades cystine and cysteine) and such treatment can enhance the efficacy of CTL-mediated anticancer effects, supporting the idea that inducing ferroptosis could be considered a productive way for treating cancer and overcoming immunotherapy resistance (Wang et al., 2019). This evidence concerns the gene CD274 and cancer.