Molecular and immunohistochemical analysis of the prognostic value of cell-cycle regulators in urothelial neoplasms of the bladder

European Urology
Andriy O YurakhAntonio Llombart-Bosch

Abstract

To evaluate the prognostic and predictive value of molecular and immunohistochemical markers related to cell-cycle control in terms of recurrence, progression, and survival in urothelial neoplasms of the bladder (UNB). Clinical and pathological findings of 84 patients with UNB were assessed. Homozygous deletion (HD) and promoter methylation of p14ARF, p15INK4B, p16INK4A, loss of heterozygosity of the locus 9p21, p53 mutations, and immunohistochemical expression of p53, p16, p14, p21, p27, pRb, Ki67, MDM2, and cyclin D1 proteins were evaluated in relation to overall survival (OS), recurrence-free survival (RFS), and progression-free survival (PFS). In the univariate analysis, RFS was shorter in cases with p14ARF (p=0.006), p15INK4B (p=0.003), p16INK4A (p=0.03) HD, low p14 immunoreactivity index (IRI) (p=0.01) and high Ki67 IRI (p=0.04); HD of the 9p21 locus genes and p14 IRI remained as independent prognostic factors for early UNB recurrence (p=0.006) whereas tumour stage (p=0.00001) and cyclin D1 IRI (p=0.049) were related to worse PFS in the multivariate analysis. In the univariate analysis, IRI for Ki67 (p=0.002), cyclin D1 (p=0.06), p53 (p=0.00008), p16 (p=0.02), p27 (p=0.0005) MDM2 (p=0.01) and p53 mutations (p=0.03) were r...Continue Reading

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