SLC38A1 and cancer: The transporters capable of importing glutamine such as ATB0,+ (SLC6A14 gene), SNAT1 (SLC38A1 gene), ASCT2 (SLC1A5 gene), LAT1 (SLC7A5 gene), and LAT2 (SLC7A8 gene) [42] are crucial in cancer metabolic remodeling often being upregulated in tumors [43,44,45,46,47].