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Ann Surg Oncol. 2013 Jul;20(7):2440-5. doi: 10.1245/s10434-012-2709-4. Epub 2012 Oct 30.

Nuclear E-cadherin expression is associated with the loss of membranous E-cadherin, plasmacytoid differentiation and reduced overall survival in urothelial carcinoma of the bladder.

Author information

1
Department of Urology, University Hospital Erlangen, Erlangen, Germany. bastian.keck@uk-erlangen.de

Abstract

BACKGROUND:

Loss of E-cadherin represents a hallmark of plasmacytoid differentiation. We analyzed the effect of membranous E-cadherin loss and its nuclear accumulation in patients with locally advanced conventional urothelial carcinoma (UC) who were treated with radical cystectomy and adjuvant chemotherapy.

METHODS:

A total of 247 formalin-fixed, paraffin-embedded tumor samples were reviewed to detect histological variants of UC. Immunohistochemical staining of E-cadherin was performed and analyzed for membranous and nuclear expression. The correlation between E-cadherin expression and histology was assessed, and overall survival (OS) was analyzed with univariate and multivariate Cox regression and Kaplan-Meier analyses. Correlation of nuclear E-cadherin to tumor stage (pT), lymph node metastasis (pN), histologic subtype, and chemotherapy was performed by Fisher's exact test.

RESULTS:

Membranous and nuclear E-cadherin expression was strongly correlated to plasmacytoid urothelial carcinoma (PUC) (p < 0.001). Complete loss of membranous E-cadherin expression was observed in 76.2 % of PUCs, 11.1 % of conventional UCs, and 0 % of micropapillary urothelial carcinoma (MPCs). Nuclear accumulation was found in 47.6 % of PUCs, 10 % of MPCs, and 1.8 % of UCs. Sixty-two percent of all tumors with negative membranous E-cadherin expression and nuclear accumulation were PUCs (p = 0.035). In a Kaplan-Meier analysis, mean survival with nuclear E-cadherin expression was 31.9 months [95 % confidence interval (CI) 16.1-47.6] of patients without nuclear staining 61 months (95 % CI 53.5-67.7; p = 0.045). A univariate Cox regression analysis showed that nuclear E-cadherin accumulation was associated with a 2-fold increase in risk of death (95 % CI 1.03-4.06; p = 0.04). In multivariate Cox regression analysis adjusted to type of chemotherapy, tumor stage, and tumor grade, the hazard ratio for patients with nuclear E-cadherin was 2.03 (95 % CI 1.00-4.121; p = 0.050).

CONCLUSIONS:

Nuclear E-cadherin is associated with PUCs and is suggested to be an independent prognostic factor in advanced UC.

PMID:
23108554
DOI:
10.1245/s10434-012-2709-4
[Indexed for MEDLINE]

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