SLC1A5 and endometrial endometrioid carcinoma: To determine the expression levels of the amino acid transporter, ASCT2/SLC1A5, in endometrial carcinoma we compared gene expression in serous and endometrioid subtype tumours with normal age-matched endometrium using published gene expression data.29 These data showed a significant increase in ASCT2 mRNA expression in serous and endometrioid endometrial carcinoma samples in comparison to normal endometrium (P<0.001, Mann–Whitney U-test, Figure 1a).