TWIST overexpression predicts biochemical recurrence-free survival in prostate cancer patients treated with radical prostatectomy.

Objective: The aim of this study was to determine whether TWIST and androgen receptor (AR) expression can predict the outcome in radical prostatectomy (RP) patients.
Material and Methods: Samples from different tumour areas of 181 prostate cancer patients were analysed for TWIST and AR expression, and the results were correlated with known clinicopathological data and biochemical recurrence-free survival (BFS).
Results: TWIST overexpression in the margin area of the tumour (M-TWIST) was related to positive surgical margin (p = 0.047), capsule invasion (p = 0.006) and biochemical recurrence (BCR) (p = 0.004). AR expression in the margin area of the tumour (M-AR) was associated with high Gleason score (p = 0.004), positive surgical margin (p = 0.004) and BCR (p = 0.05). M-TWIST overexpression was clearly associated with M-AR expression (p < 0.0001). Four parameters, i.e. M-TWIST overexpression (p < 0.0001), positive surgical margin (p = 0.003), high Gleason score (p < 0.0001) and M-AR expression (p = 0.008), predicted BFS. In the multivariate analysis, M-TWIST overexpression (p = 0.011) and Gleason score (p = 0.002) were the only independent predictors of BFS.
Conclusions: M-TWIST overexpression is associated with clinicopathological prognosis factors and M-AR overexpression and is a powerful independent predictor of BFS in conjunction with the Gleason score in prostate cancer patients treated with RP.