Abstract
Context: Adrenocortical cancer (ACC) is an aggressive tumor with a heterogeneous outcome. Prognostic stratification is difficult even based on tumor stage and Ki67. Recently integrated genomics studies have demonstrated that CpG islands hypermethylation is correlated with poor survival. Objective: The goal of this study was to confirm the prognostic value of CpG islands methylation on an independent cohort. Design: Methylation was measured by methylation-specific multiplex ligation-dependent probe amplification (MS-MLPA). Setting: MS-MLPA was performed in a training cohort of 50 patients with ACC to identify the best set of probes correlating with disease-free survival (DFS) and overall survival (OS). These outcomes were validated in an independent cohort from 21 ENSAT centers. Patients: The validation cohort included 203 patients (64% women, median age 50 years, 80% localized tumors). Main Outcome Measures: DFS and OS. Results: In the training cohort, mean methylation of 4 genes (PAX5, GSTP1, PYCARD, PAX6) was the strongest methylation marker. In the validation cohort, methylation was a significant prognostic factor of DFS (P , 0.0001) and OS (P , 0.0001). Methylation, Ki67, and ENSAT stage were combined inmultivariatemodels. For DFS,methylation (P = 0.0005) and stage (P,0.0001) but not Ki67 (P = 0.19) remained highly significant. For OS, methylation (P = 0.0006), stage (P , 0.0001), and Ki67 (P = 0.024) were independent prognostic factors. Conclusions: Tumor DNA methylation emerges as an independent prognostic factor in ACC. MSMLPA is readily compatible with clinical routine and should enhance our ability for prognostication and precision medicine.
Original language | English |
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Pages (from-to) | 923-932 |
Number of pages | 10 |
Journal | Journal of Clinical Endocrinology and Metabolism |
Volume | 102 |
Issue number | 3 |
Early online date | 14 Dec 2016 |
DOIs | |
Publication status | Published - 1 Mar 2017 |
ASJC Scopus subject areas
- Endocrinology, Diabetes and Metabolism
- Biochemistry
- Endocrinology
- Clinical Biochemistry
- Biochemistry, medical