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  • Title: Decreased galectin-8 is a strong marker for recurrence in urothelial carcinoma of the bladder.
    Author: Kramer MW, Waalkes S, Serth J, Hennenlotter J, Tezval H, Stenzl A, Kuczyk MA, Merseburger AS.
    Journal: Urol Int; 2011; 87(2):143-50. PubMed ID: 21757871.
    Abstract:
    OBJECTIVE: To investigate galectin-8 expression patterns in normal urothelium and bladder cancer specimens and to elucidate its prognostic value. MATERIALS AND METHODS: 162 samples of non-muscle-invasive transitional cell carcinoma, 25 samples of muscle-invasive transitional cell carcinoma and 10 samples of normal urothelium were investigated by immunohistochemistry using tissue microarrays. Complete patient and tumor characteristics were compared with galectin-8 staining patterns. The likelihood of tumor recurrence and progression was analyzed based on a 3-year follow-up. RESULTS: Loss of galectin-8 was associated with the likelihood of tumor recurrence in univariate (p < 0.05) and multivariate analyses (p < 0.01). No significance was observed for tumor progression. Patients whose specimens showed weak galectin-8 expression had a shorter recurrence-free interval (42 vs. 12 months; p < 0.01, log-rank test). All of the 10 normal urothelium samples showed high galectin-8 expression. Decreased staining was found to be associated with higher tumor stages and grades (p < 0.0001, one-way ANOVA). A significant difference was found comparing normal urothelium with any tumor stage (p < 0.01), pTa vs. pT1 tumors (p < 0.05) and non-muscle-invasive vs. muscle-invasive tumors (p < 0.0001). CONCLUSIONS: Loss of galectin-8 might be an early step in the development of malignant lesions of the bladder and is a significant independent predictor of recurrence.
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