A research flowchart is presented in Figure 1. A total of 1204 predicted miRNAs related to the m7G methyltransferase target gene RNMT/FAM103A1 in BC patients were analysed for differences (Figure 2A), and 201 miRNAs with differences were obtained, of which 136 were upregulated differentially expressed miRNAs (logFC ≥ 1, FDR < 0.05), and 65 downregulated differentially expressed miRNAs (logFC ≤ -1, FDR < 0.05) (Figure 2C). Here, RAMAC is linked to breast cancer.