Using the TIMER database (TIMER1.0, https://cistrome.shinyapps.io/timer/), the mRNA expression levels of GPx4 between tumour and adjacent normal tissues in a pan-cancer dataset were confirmed (Figure 1A), and GPx4 was overexpressed in stomach adenocarcinoma compared with adjacent normal tissues (P<0.01). Here, GPX4 is linked to gastric adenocarcinoma.