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Authors Xu N, Qu GY, Wu YP, Li XD, Lin MY, Chen SH, Xue XY, Wei Y
Received 28 October 2017
Accepted for publication 29 January 2018
Published 19 March 2018 Volume 2018:10 Pages 503—511
DOI https://doi.org/10.2147/CMAR.S155453
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Justinn Cochran
Peer reviewer comments 2
Editor who approved publication: Professor Kenan Onel
Objective: Upregulation of actin-related protein 2/3 complex subunit 2 (Arp2)
is observed in various tumors, but its expression pattern has not been revealed
in bladder urothelial carcinoma (BUC). The purpose of this study was to
investigate the role of Arp2 expression in the pathological features and the
prognosis as well as lymph node metastasis of BUC.
Methods: A total of 228 tissue specimens from BUC patients who underwent a
radical cystectomy were collected. In addition, 40 lymph node specimens and 40
normal bladder tissue specimens as controls were used. All of the specimens
were used to construct a tissue microarray and were subsequently subjected to
immunohistochemical staining for Arp2 expression. Logistic and Cox regression
analyses and Kaplan–Meier curve analysis were applied to analyze the relation
between Arp2 expression and multiple clinical features of patients with BUC.
Results: Immunohistochemical staining observation showed that Arp2 was mainly
expressed in the cytoplasm and nucleus of positive cells and that Arp2
expression in BUC was significantly higher than that in normal bladder tissues.
Arp2 expression in BUC tissues was associated with tumor size, tumor
multiplicity, tumor stage, tumor grade, and lymph node metastasis (P < 0.05). Logistic
regression analysis demonstrated that Arp2 expression was an independent risk
factor for lymph node metastasis of BUC (P < 0.05).
Kaplan–Meier curve analysis showed that increased Arp2 expression was
associated with a shortened recurrence-free survival (RFS) and overall survival
(OS) of BUC patients after radical cystectomy (P <
0.05).
Conclusion: These findings suggest that Arp2 is significantly upregulated in BUC
tissues when compared with normal bladder tissues, and that Arp2 expression is
an independent predictor for lymph node metastasis, RFS, and OS.
Keywords: Arp2, bladder urothelial carcinoma, immunohistochemistry, lymph
node metastasis, prognosis