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Published in: World Journal of Urology 3/2020

Open Access 01-03-2020 | Bladder Carcinoma | Original Article

Microlocalization and clinical significance of stabilin-1+ macrophages in treatment-naïve patients with urothelial carcinoma of the bladder

Authors: Bo Wang, Hao Huang, Meihua Yang, Wenjuan Yang, Zhuowei Liu, Weibin Hou, Hong Zeng, Zhihua He, Tianxin Lin, Jian Huang

Published in: World Journal of Urology | Issue 3/2020

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Abstract

Purpose

Emerging evidence has shown that macrophages (Mφs) at different tumor sites have diverse clinical attributes. Stabilin-1 is a multi-functional scavenger marker for specialized tumor-associated Mφs. This study investigates the relationship between the density and microlocalization of stabilin-1+ Mφs within tumors and the clinical outcomes of patients with urothelial carcinoma of the bladder (UCB).

Methods

In this retrospective study, 283 UCB patients who received radical cystectomy or transurethral resection were examined. Immunohistochemistry and immunofluorescence analyses were used to colocalize the expression of stabilin-1 with other markers for Mφs (CD14, CD68, CD163, and CD206). Kaplan–Meier analysis and Cox proportional hazards regression models were applied to estimate overall survival (OS) and recurrence-free survival (RFS).

Results

In UCB tissues, stabilin-1 was primarily expressed on Mφs, as evident from triple immunofluorescence staining for stabilin-1 and Mφ markers. Stabilin-1+ Mφs were often more prominent in stromal regions rather than intratumoral regions in UCB tissues (P < 0.0001). After dichotomization at the median cell density for stabilin-1+ Mφs, only intratumoral stabilin-1+ Mφ density was a predictor of poor OS (P < 0.001) and RFS (P = 0.026). Moreover, intratumoral stabilin-1+ Mφ density was positively associated with tumor stage (P < 0.01) and histological grade (P < 0.01), and emerged as an independent prognostic factor for OS (HR 2.371; P < 0.0001), but not for RFS (HR 1.491; P = 0.061).

Conclusions

Our findings indicate that intratumoral stabilin-1+ Mφs could potentially be used as a pro-tumoral prognostic marker for UCB patients.
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Metadata
Title
Microlocalization and clinical significance of stabilin-1+ macrophages in treatment-naïve patients with urothelial carcinoma of the bladder
Authors
Bo Wang
Hao Huang
Meihua Yang
Wenjuan Yang
Zhuowei Liu
Weibin Hou
Hong Zeng
Zhihua He
Tianxin Lin
Jian Huang
Publication date
01-03-2020
Publisher
Springer Berlin Heidelberg
Published in
World Journal of Urology / Issue 3/2020
Print ISSN: 0724-4983
Electronic ISSN: 1433-8726
DOI
https://doi.org/10.1007/s00345-019-02853-0

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