Based on bioinformatic predictions, experimental data, and literature review, we constructed a regulatory network illustrating potential interactions among the investigated lncRNAs (ADAMTS9-AS2, HAND2-AS1, HOTAIRM1, MEG3), miRNAs (miR-17-5p, miR-106a-5p, and others), the key DNA methyltransferase DNMT1, and genes associated with EMT and metastasis (including TCF7L2, VIM, VEGFA, ZEB1, CDH1, PTEN, and TGFB1) in the context of BC (Figure 9). The gene discussed is TCF7L2; the disease is breast cancer.