SLC1A5 and breast cancer: Additionally, inhibition of SLC1A5-mediated glutamine transport by knockdown of SLC1A5 or adding SLC1A5 inhibitor L-γ-glutamyl-p-nitroanilide (GPNA) attenuates mTOR activation and proliferation of breast cancer cells, and these inhibitory effects are more prominent in TNBC tumor cells compared to luminal subtypes (88).