ATF4 and neoplasm: It has been shown that miR-214 can affect proteins such as TfR1, plasmacytoma variant translocation 1 (PVT1), activating transcription factor 4 (ATF4), and p53 [146,147], while miR-6852 is an inducer of ferroptosis in tumor cells through the regulation of cystathionine β-synthase (CBS) expression [148,149].