SLC5A1 and cancer: Solute Carrier Family 1 Member 5 (SLC1A5) is a significant member of the amino acid transporter family, and a substantial body of evidence indicates that SLC1A5 exhibits markedly elevated expression in a range of cancers.20, 21, 22, 23, 24 Some studies have shown that glutamine metabolism has an impact on tumor proliferation, invasion, and stimulation of tumor neovascularization.25