Abstract
The aim of this study was to evaluate the potential prognostic significance of interleukin-33 (IL-33) in patients with clear-cell renal cell carcinoma (ccRCC) after surgical resection. In this retrospective research, we enrolled 203 patients with ccRCC undergoing nephrectomy between 2003 and 2004 in a single institution. We recorded clinicopathologic features, overall survival (OS), and recurrence-free survival (RFS) and assessed IL-33 expression by immunohistochemical staining. On such bases, the correlations between IL-33 expression and clinicopathologic features and prognosis were evaluated. A high expression of IL-33 was significantly associated with advanced TNM stage and Fuhrman grade (p = 0.017 and p < 0.001, respectively) in patients with ccRCC. Moreover, multivariate analysis identified IL-33 as an independent prognostic factor of OS for patients with ccRCC after surgery (hazard ratio = 2.050; 95 % CI 1.223–3.447; p = 0.006). The incorporation of IL-33 into the TNM stage and Fuhrman grade might help to refine individual risk stratification. The IL-33 expression may serve as an independent negative predictor of survival for patients with ccRCC after surgery.
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Acknowledgments
This study was funded by grants from the National Basic Research Program of China (2012CB822104), National Key Projects for Infectious Diseases of China (2012ZX10002012-007, 2016ZX10002018-008), National Natural Science Foundation of China (31100629, 31270863, 81372755, 31470794, 81401988, 81402082, 81402085, 81471621, 81472227, 81472376, 31570803, 81501999, and 81572352), and Program for New Century Excellent Talents in University (NCET-13-0146). All these study sponsors have no roles in the study design, in the collection, analysis, and interpretation of data.
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Zewei Wang, Le Xu and Yuan Chang contributed equally to this work.
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Figure S1
Kaplan-Meier analysis of OS in patients with TNM stage III (a) and stage IV (b) based on the expression of IL-33. Kaplan-Meier analysis of RFS in patients with T3-4N0M0 (c). P value was calculated by log-rank test. (GIF 16 kb)
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Wang, Z., Xu, L., Chang, Y. et al. IL-33 is associated with unfavorable postoperative survival of patients with clear-cell renal cell carcinoma. Tumor Biol. 37, 11127–11134 (2016). https://doi.org/10.1007/s13277-016-4879-3
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DOI: https://doi.org/10.1007/s13277-016-4879-3