Regarding fucosylated glycans synthesized by a range of fucosyltransferases (FUT1-FUT11), previous studies have found that the expression of sLeX is mainly regulated by FUT6 in breast cancer, while FUT7 plays an essential role in the upregulation of sLeX in adult T cell leukemia cells (27, 28). This evidence concerns the gene FUT6 and breast carcinoma.