Kaplan-Meier analyses demonstrated that expression of TRIP13 TG/ Em-MYC TG decreased overall survival by greater than 25% compared to TRIP13 WT/ Em-MYC TG mice. Treatment of TRIP13 TG/ Em-MYC TG mice with a USP7 inhibitor, P5091, rescued this phenotype, restored overall survival to nearly that of TRIP13 WT/ Em-MYC TG mice. These data indicate that USP7 plays a key role in TRIP13-induced tumor progression.