found that the expression of SOX5 increased in BC tissues and in vitro cell lines, and high expression of SOX5 could promote the growth and migration of BC cancer cells, while inhibition of SOX5 would inhibit the expression of DNA methyltransferase 1 (DNMT1), thus inhibiting the growth and migration of cancer cells and promoting cell apoptosis (40). This evidence concerns the gene DNMT1 and cancer.