4.5 Article

β1,6-N-acetylglucosaminyltransferase V predicts recurrence and survival of patients with clear-cell renal cell carcinoma after surgical resection

Journal

WORLD JOURNAL OF UROLOGY
Volume 33, Issue 11, Pages 1791-1799

Publisher

SPRINGER
DOI: 10.1007/s00345-014-1451-x

Keywords

Clear-cell renal cell carcinoma; beta 1,6-N-acetylglucosaminyltransferase V; Prognostic biomarker; Overall survival; Recurrence-free survival

Funding

  1. National Basic Research Program of China [2012CB822104]
  2. National Key Projects for Infectious Diseases of China [2012ZX10002-012]
  3. National Natural Science Foundation of China [31100629, 81471621, 31270863, 81472227]
  4. Program for New Century Excellent Talents in University [NCET-13-0146]
  5. Shanghai Rising-Star Program [13QA1400300]

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beta 1,6-N-acetylglucosaminyltransferase V (MGAT5), which is required for the biosynthesis of beta 1,6GlcNAc-branched N-linked glycans attached to cell surface and secreted glycoproteins, accounts for oncogenic growth signal transduction during the development and progression of various malignancies. Our present study aimed to evaluate the impact of MGAT5 expression on recurrence and survival of patients with clear-cell renal cell carcinoma (ccRCC) following surgery. We retrospectively enrolled 265 patients (196 in the training cohort and 69 in the validation cohort) with ccRCC undergoing nephrectomy at a single institution. Clinicopathologic features, overall survival (OS) and recurrence-free survival (RFS) were recorded. MGAT5 intensities were assessed by immunohistochemistry in specimens of patients. Kaplan-Meier method was applied to compare survival curves. Cox regression models were used to analyze the impact of prognostic factors on OS and RFS. Concordance index (C-index) was calculated to assess predictive accuracy. In both cohorts, MGAT5 expression positively correlated with metastatic and advanced TNM stage. High MGAT5 expression indicated poor survival (P < 0.001 in training set and P < 0.001 in validation set) and early recurrence (P < 0.001 in training set and P = 0.004 in validation set) of patients with ccRCC. After multivariate Cox regression analysis, MGAT5 expression was identified as an independent adverse prognostic factor for survival and recurrence. The predictive accuracy of TNM, UISS and SSIGN prognostic models was improved when MGAT5 expression was added. MGAT5 expression is a potential independent adverse prognostic biomarker for recurrence and survival of patients with ccRCC after nephrectomy.

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