Recurrence pattern and TP53 mutation in upper urinary tract urothelial carcinoma

Area of Science:

• Oncology
• Genetics
• Urology

Background:

• TP53 gene mutations are linked to cancer prognosis.
• Understanding TP53 mutation patterns in upper urinary tract urothelial carcinoma (UTUC) is crucial for predicting patient outcomes.

Purpose of the Study:

• To investigate the association between TP53 mutation patterns and recurrence patterns in UTUC patients.
• To determine if specific TP53 mutations can predict recurrence sites and survival.

Main Methods:

• Analysis of TP53 gene mutations (exome 2-11) in 165 UTUC patients undergoing nephroureterectomy.
• Comparison of bladder recurrence, contralateral UTUC recurrence, and metastases using log-rank test and Cox proportional hazard models.
• Categorization of patients into A:T to T:A transversion (AT group), other mutations (NAT group), and wild-type TP53 (WT group).

Main Results:

• The AT group showed a predilection for females, higher rates of end-stage renal disease, and more high-grade tumors.
• Non-A:T to T:A transversion (NAT) TP53 mutations were associated with shorter bladder and metastasis-free survival.
• A:T to T:A transversion (AT) mutations were linked to shorter contralateral UTUC recurrence-free survival.
• TP53 mutation type influences specific recurrence patterns: AT to T:A transversions increase contralateral UTUC risk, while other TP53 mutations elevate bladder recurrence and metastasis risk.

Conclusions:

• TP53 mutation patterns are significantly associated with distinct recurrence patterns in UTUC.
• Specific TP53 mutation types serve as potential biomarkers for predicting recurrence risk (bladder, contralateral UTUC, metastases) in UTUC patients.
• This finding could aid in personalized treatment strategies and patient management for UTUC.