have demonstrated that PCIF1, an RNA N6 2′‐O‐dimethyladenosine (m6Am) methyltransferase, can reduce the m6Am modification on ferroptosis suppressor genes such as FTH1, SLC3A2 and T‐cell activation marker CD69 in CD8+ T cells, which further promotes CD8+ T‐cell ferroptosis and enhances tumour growth.166. This evidence concerns the gene CD8A and neoplasm.