LAT1 has been detected in RERF-LC-MA lung small cell carcinoma cells, leukemia cell lines, T24 bladder carcinoma cells, and HeLa uterine cervical carcinoma cells and its expression has been correlated with the size of metastatic distant tumors in rats, thus being suggested as a potential therapeutic target for many cancers [3]. This evidence concerns the gene SLC7A5 and cancer.