Open AccessHigh expression of interleukin‐11 is an independent indicator of poor prognosis in clear‐cell renal cell carcinoma
Author(s) -
Pan Deng,
Xu Le,
Liu Haiou,
Zhang Weijuan,
Liu Weisi,
Liu Yidong,
Fu Qiang,
Xu Jiejie
Publication year - 2015
Publication title -
cancer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.035
H-Index - 141
eISSN - 1349-7006
pISSN - 1347-9032
DOI - 10.1111/cas.12638
Subject(s) - medicine , clear cell renal cell carcinoma , proportional hazards model , oncology , stage (stratigraphy) , renal cell carcinoma , nephrectomy , concordance , multivariate analysis , immunohistochemistry , angiogenesis , t stage , pathological , survival analysis , interleukin 6 , cancer , cytokine , kidney , biology , paleontology
Interleukin‐11 ( IL ‐11), a member of the IL ‐6 family of cytokines, exerts pleiotropic oncogenic activities by stimulating angiogenesis and metastasis in many cancer types. The present study aims to evaluate the impact of IL ‐11 expression on recurrence and mortality of patients with clear‐cell renal cell carcinoma (cc RCC ). We retrospectively enrolled 193 cc RCC patients undergoing nephrectomy at a single center. Clinicopathologic features, recurrence‐free survival ( RFS ) and overall survival ( OS ) were recorded. IL ‐11 intensity was assessed by immunohistochemistry in tumor specimens. The Kaplan–Meier method was applied to compare survival curves. Cox regression models were used to analyze the impact of prognostic factors on RFS and OS . The concordance index (C‐index) was calculated to assess predictive accuracy. High IL ‐11 expression is associated with increased risk of recurrence and poor survival for cc RCC patients ( P < 0.001 and P < 0.001, respectively), especially those with early‐stage disease ( TNM stage I + II ). Multivariate analyses confirmed that IL ‐11 expression was an independent prognostic factor for RFS and OS ( P = 0.006 and P = 0.008, respectively). The predictive accuracy of well‐established prognostic models was improved when IL ‐11 expression was integrated. In conclusion, high IL ‐11 expression is an independent predictor of poor prognosis in cc RCC patients. It may help identify patients who could benefit from additional treatments and closer follow up.