Assess the expression of ubiquitin specific protease USP2a for bladder cancer diagnosis.

Abstract:

BACKGROUND:Given that a deubiquitinating enzyme, ubiquitin-specific protease 2a (USP2a), regulates ubiquitination, trafficking, and degradation of EGFR, which plays a critical role in bladder cancer, in this study, we aimed to quantify the USP2a gene expression, and to determine the possibility that USP2a can be used for bladder cancer diagnosis. METHODS:Using two independent cohorts (cohort 1, n = 339 in total; cohort 2, n = 140 in total) consisting of human bladder tissues from BC patients and normal controls, we analyzed the gene expression levels of USP2a. A quantitative real-time PCR amplification was performed using a Rotor Gene 6000 instrument to quantify the expression of USP2a mRNA. RESULTS:A comparison of 305 bladder cancers and 34 age-matched controls showed an 81.4% reduction in USP2a expression in bladder cancers as compared to normal bladder tissues (p < 0.001). In the independent cohort consisting of 140 BC tissues and matched adjacent normal bladder tissues, the levels of USP2a in the specimens of BC patients were reduced by 86.9% as compared to matched surrounding normal specimens from the same patients (p < 0.001). Furthermore, there was 36.3% reduction of USP2a gene expression in muscle invasive bladder cancer (MIBC, n = 121), compared to non muscle invasive bladder cancer (NMIBC, n = 184) (p = 0.004). Lastly, USP2a mRNA expression was significantly reduced in higher stages of MIBC patients (p = 0.024), but not in NMIBC patients. CONCLUSIONS:Our findings suggest that USP2a mRNA may be considered as a diagnostic marker candidate for bladder cancer, in particular, to stratify MIBC patients with a more invasive phenotype.

journal_name

BMC Urol

journal_title

BMC urology

authors

Jeong P,Ha YS,Yun SJ,Yoon HY,Freeman MR,Kim J,Kim WJ

doi

10.1186/s12894-015-0074-x

subject

Has Abstract

pub_date

2015-08-07 00:00:00

pages

80

issn

1471-2490

pii

10.1186/s12894-015-0074-x

journal_volume

15

pub_type

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