A further study showed that the m6A levels were significantly upregulated in lung metastatic breast cancer cells, which promoted the translation, elongation, and mRNA stability of keratin 7 (KRT7), a key epithelial-to-mesenchymal transition (EMT)-associated protein, by targeting FTO and METTL3, thereby promoting lung metastasis of breast cancer cells. The gene discussed is METTL3; the disease is breast cancer.