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Expression and prognostic significance of contactin 1 in human hepatocellular carcinoma

Authors Li G, Huang M, Pan T, Jia W

Received 29 September 2015

Accepted for publication 27 November 2015

Published 19 January 2016 Volume 2016:9 Pages 387—394


Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Manfred Beleut

Peer reviewer comments 3

Editor who approved publication: Professor Daniele Santini

Guang-Yao Li,1,2,* Mei Huang,1,2,* Ting-Ting Pan,1,2 Wei-Dong Jia1,2

1Department of General Surgery, Affiliated Provincial Hospital, Anhui Medical University, 2Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery, Hefei, People’s Republic of China

*These authors contributed equally to this work

Background: CNTN1, a member of the CNTN family of neural cell-recognition molecules, is involved in tumor invasion and metastasis. Although the expression of CNTN1 has been reported in several human malignancies, the expression of CNTN1 in hepatocellular carcinoma (HCC) and its correlation with prognosis remain unclear. The aim of this study was to evaluate the expression of CNTN1 and determine the clinicopathological parameters and prognostic value of CNTN1 in HCC patients.
Materials and methods: Quantitative real-time polymerase chain-reaction and Western blotting assays were performed to assess messenger RNA and protein levels of CNTN1 in 20 matched HCC specimens. The clinical and prognostic significance of CNTN1 in 90 cases of HCC was determined by immunohistochemistry.
Results: CNTN1 expression was higher in HCC compared to the expression found in adjacent tissues at both messenger RNA and protein levels (P<0.01). Notably, immunohistochemical results revealed that CNTN1 expression was significantly higher in HCC compared to adjacent tissues (54.4% vs 12.2%, P=0.01). Furthermore, positive CNTN1 expression was associated with tumor size, tumor capsulae, status of metastasis, and tumor–node–metastasis stage. Kaplan–Meier survival analysis showed that high CNTN1 was correlated with reduced overall survival (OS) rate (P<0.001) and disease-free survival (DFS) rate (P=0.001). Multivariate analysis identified CNTN1 as an independent poor prognostic factor of OS and DFS in HCC patients (P=0.007 and P=0.002, respectively).
Conclusion: Our results suggest that CNTN1 could play an important role in HCC and serve as an independent unfavorable prognostic factor for OS and DFS and a potential therapeutic target for HCC.

Keywords: CNTN1, hepatocellular carcinoma, expression, prognosis, immunohis­tochemistry

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