This speculation was further supported by our results that cancer cells including MCF-7, MDA-MB-231, T47D, A549, HeLa, HepG2 and 4T1 displayed obviously higher levels of GLUT5 than those non-tumor cells, such as 293T, MCF-10A, HBL100 and 3T3 (Fig. 5C). This evidence concerns the gene SLC2A5 and cancer.