Clinical Research Papers:

High mucin 5AC expression predicts adverse postoperative recurrence and survival of patients with clear-cell renal cell carcinoma

Haijian Zhang, Yidong Liu, Huyang Xie, Weisi Liu, Qiang Fu, Dengfu Yao _, Jiejie Xu and Jianxin Gu

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Oncotarget. 2017; 8:59777-59790. https://doi.org/10.18632/oncotarget.15894

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Haijian Zhang1,2,*, Yidong Liu1,*, Huyang Xie3,*, Weisi Liu1, Qiang Fu1, Dengfu Yao2, Jiejie Xu1 and Jianxin Gu1

1 Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China

2 Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Jiangsu, China

3 Department of Urology, Fudan University Shanghai Cancer Center, Shanghai, China

* These authors have contributed equally to this work

Correspondence to:

Dengfu Yao, email:

Jiejie Xu, email:

Jianxin Gu, email:

Keywords: mucin 5AC, clear-cell renal cell carcinoma, overall survival, recurrence-free survival, prognostic biomarker

Received: December 21, 2016 Accepted: February 23, 2017 Published: March 04, 2017


Background: Mucin 5AC (MUC5AC), as a member of secreted/gel-forming mucin family, was frequently found to be abnormally expressed in inflammation or malignant diseases. However, the clinic pathologic features and prognostic values of MUC5AC in clear-cell renal cell carcinoma (ccRCC) have not been reported up to now.

Methods: MUC5AC expression was analyzed by immunohistochemistry on tissue microarrays. Kaplan-Meier survival curves, Univariate and Multivariate Cox analysis and newly-established nomogram model were performed to evaluate the prognostic value.

Results: MUC5AC expression was firstly found to be up-regulated in patients with ccRCC, positively associated with tumor size, pN stage, lymphovascular invasion, Fuhrman grade, rahbdoid differentiation, sarcomatoid features, tumor necrosis, ECOG-PS and recurrence. Furthermore, MUC5AC expression might be contributed to risk stratification of ccRCC patients with TNM stage III+IV or Fuhrman grade 3 or 4 for overall survival (OS) and recurrence-free survival (RFS) analysis, and it was demonstrated to be negatively correlated with OS and RFS of ccRCC patients. What’s more, MUC5AC was identified as a potential independent adverse prognostic factor; prediction accuracy of MUC5AC-based new nomogram model was drastically improved for OS and RFS of ccRCC patients.

Conclusion: MUC5AC is a promising independent adverse prognostic factor for ccRCC patients, it maybe conducive to postoperative risk stratification and guide treatment in the future.

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