In addition, we explored therapeutic targets by investigating FOXA1 interacting protein within proteins encoded by upregulated genes in FOXA1 mutant prostate cancer, and identified six genes—HSP90AB1, KDM1A, FKBP4, H2BC15, WNT7B, and GRB7 (Figure S5). This evidence concerns the gene GRB7 and Familial prostate cancer.