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Authors Huang DW, Huang M, Lin XS, Huang Q
Received 10 May 2017
Accepted for publication 6 July 2017
Published 31 July 2017 Volume 2017:10 Pages 3817—3825
DOI https://doi.org/10.2147/OTT.S141476
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Narasimha Reddy Parine
Peer reviewer comments 2
Editor who approved publication: Dr Chiung-Kuei Huang
Background: CD155, an immunoglobulin-like adhesion molecule, plays an
important role in carcinoma such as cells migration, proliferation, metastasis,
and tumor immune. The upregulation of CD155 has been found in several human
malignancies, but its expression in cholangiocarcinoma (CCA) still remains
unclear. The aim of this study is to investigate CD155 expression and its
correlations with clinicopathologic data, angiogenesis, and prognosis in the
patients with CCA.
Materials and
methods: CD155 expression was investigated in
20 paired CCA tissues and corresponding paracancerous tissues by Western
blotting and quantitative real-time polymerase chain reaction assays at protein
and mRNA levels. Besides, this study evaluated the correlation between the
tumor CD155 expression and the level of both vascular endothelial growth factor
and intratumoral microvessel density by immunohistochemistry in 90 cases of
CCA. Moreover, the clinical and prognostic significance of CD155 in CCA was
assessed by immunohistochemistry.
Results: The protein and mRNA levels of CD155 were higher in CCA tumor
tissues compared with corresponding paracancerous tissues (P <0.05). Immunohistochemical
staining showed that CD155 was located in the cytoplasm of carcinoma cells and
overexpressed in 61.2% (55/90) CCA tissues. Obviously, CD155 expression level
was significantly correlated with tumor histological grade (P =0.002), lymph node metastasis (P <0.001), and
tumor-node-metastasis (P =0.03).
Additionally, Spearman rank correlation test demonstrated that CD155 expression
was positively associated with vascular endothelial growth factor (r =0.481, P <0.001) and microvessel
density (r =0.442, P <0.001) in CCA tissues. More
importantly, CCA patients with high CD155 expression had a markedly shorter
overall survival (P <0.001) and disease-free
survival (P <0.001) after surgical
resection, and multivariate analysis showed that high CD155 expression was an
independent poor prognostic predictor of overall survival and disease-free
survival (P <0.001).
Conclusion: Our results revealed that upregulated CD155 correlated with
aggressive clinicopathologic characteristics, angiogenesis, and poor prognosis
in CCA and may be a promising prognostic biomarker for the CCA patients.
Keywords: CD155, cholangiocarcinoma, angiogenesis, prognosis,
immunohistochemistry