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01-10-2015 | Original Article

The increased transglutaminase 2 expression levels during initial tumorigenesis predict increased risk of metastasis and decreased disease-free and cancer-specific survivals in renal cell carcinoma

Authors: Selcuk Erdem, Gulcin Yegen, Dilek Telci, Ibrahim Yildiz, Tzevat Tefik, Halim Issever, Isin Kilicaslan, Oner Sanli

Published in: World Journal of Urology | Issue 10/2015

Abstract

Purpose

The aim of this study was to investigate the role of transglutaminase 2(TG2) in renal cell carcinoma (RCC) by comparing the immunohistochemistry staining of primary and metastatic tumor tissues.

Methods

A total of 33 metastatic RCC(mRCC) and 33 non-metastatic RCC (nmRCC) patients who were matched as closely as possible based on gender, age, nuclear grade and pathologic T stage were retrospectively investigated. TG2 immunohistochemistry staining was performed on paraffin-embedded primary tumor tissues from both patient groups and on metastatic tissues from mRCC patients. The tissues were scored from 0 to 7 according to the TG2 staining. Furthermore, the patients were stratified into two groups using median primary tumor staining score as the cutoff value: Group 1 (high risk, n = 41) and Group 2(low risk, n = 22). The clinical, histopathological and survival outcomes were compared between these risk groups using Chi-square test, t test, Mann–Whitney U test and Kaplan–Meier survival analyses.

Results

The median TG2 score for primary tumor was 5 for the entire study population. The median primary tumor TG2 score of the mRCC patients was significantly higher compared to the nmRCC patients (6 vs. 4, p < 0.001). The TG2 score between the primary and metastatic tissues of mRCC patients was not significantly different (6 vs. 7, p = 0.086). The percentage of metastatic patients was significantly higher in Group 1 compared to Group 2 (68.3 vs. 18.2 %, p < 0.001). Kaplan–Meier analyses showed that 5-year disease-free (34.9 vs. 92.9 %, p = 0.001) and cancer-specific (47.4 vs. 86.5 %, p = 0.04) survival rates were significantly lower in high-risk group.

Conclusions

The increased expression of TG2 in primary tumor predicts metastasis in RCC patients and is also associated with a decrease in disease-free and cancer-specific survival outcomes.

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Title: The increased transglutaminase 2 expression levels during initial tumorigenesis predict increased risk of metastasis and decreased disease-free and cancer-specific survivals in renal cell carcinoma
Authors: Selcuk Erdem
Gulcin Yegen
Dilek Telci
Ibrahim Yildiz
Tzevat Tefik
Halim Issever
Isin Kilicaslan
Oner Sanli
Publication date: 01-10-2015
Publisher: Springer Berlin Heidelberg
Published in: World Journal of Urology / Issue 10/2015
Print ISSN: 0724-4983
Electronic ISSN: 1433-8726
DOI: https://doi.org/10.1007/s00345-014-1462-7

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The increased transglutaminase 2 expression levels during initial tumorigenesis predict increased risk of metastasis and decreased disease-free and cancer-specific survivals in renal cell carcinoma

Abstract

Purpose

Methods

Results

Conclusions

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Abstract

Purpose

Methods

Results

Conclusions

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