However, to the best of our knowledge, no targeted agents against UBE2T, UBE2C, BIRC5, or USP9X, either approved or in development, can be found in The Drug Gene Interaction Database or Genomics of Drug Sensitivity in Cancer database, while the only USP7 inhibitor, P22077, has not been tested in BC [56]. This evidence concerns the gene USP9X and cancer.