LAT1 (SLC7A5) is the main BCAA transporter, which belongs to the Na+- and pH-independent L-type amino acid transporters (system L/antiporter) SLC7 family and is highly expressed in many cancers, including the most frequently diagnosed cancers, such as lung cancer, prostate cancer, and breast cancer (Kandasamy et al., 2018; Singh and Ecker, 2018; Hafliger and Charles, 2019). This evidence concerns the gene SLC7A5 and breast cancer.