SLC7A11 and gastric cancer: However, SLC7A11-AS1 was reported to downregulate the expression of SLC7A11 in gastric cancer and epithelial ovarian cancer, in which the expression of SLC7A11-AS1 was decreased, and SLC7A11 was increased in the cancer tissues compared with the normal tissues (Yuan, Liu & Song, 2017; Luo et al., 2022).