The Gene Set Cancer Analysis (GSCA) database was used to analyse the protein expression and drug sensitivity data from Cancer Cell Line Encyclopedia (CCLE), Cancer Therapeutics Response Portal (CTRP), and Genomics of Drug Sensitivity in Cancer (GDSC) databases, and the results showed that the half‐maximal inhibitory concentration (IC50) of BRD4 inhibitors was negatively correlated with PTEN expression (Figure 2F). This evidence concerns the gene BRD4 and cancer.