High expression level of preoperative serum Uroplakin III is associated with biologically aggressive bladder cancer.
BACKGROUND
Uroplakins have been widely investigated as potential markers in patients with bladder cancer because these proteins are specific to the urothelium. However, the role of uroplakin proteins in bladder cancer remains unknown. In this study, preoperative serum levels of uroplakin III were measured in patients with urothelial carcinoma of the urinary bladder and examined for possible association with clinicopathological features and clinical outcomes.


METHODS
This study included 52 bladder cancer patients at various stages and 28 healthy controls. Uroplakin III levels were detected in preoperative sera using an automated dot blot system and a micro-dot blot array.


RESULTS
There was a significant increase in serum uroplakin III levels in patients with bladder cancer as compared to healthy controls (p<0.05). In addition, serum uroplakin III levels were associated with muscle-invasive status, high grade and lymphovascular invasion (p<0.02). Log-rank tests indicated high serum uroplakin III to be significantly associated with cancer-specific mortality.


CONCLUSIONS
Determination of serum uroplakin III level could be valuable for identifying patients with biologically aggressive bladder cancer.
Department of Urology, School of Medicine, Kitasato University, Kazagawa, Japan E-mail : kazumasa@cd5.so-net.ne.jp.
Hideyasu
H
Tsumura
Kazumasa
K
Matsumoto
Masaomi
M
Ikeda
Kengo
K
Yanagita
Shuhei
S
Hirano
Masahiro
M
Hagiwara
Ryo
R
Nagashio
Tetsuo
T
Fujita
Yuichi
Y
Sato
Masatsugu
M
Iwamura
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D002295:Carcinoma, Transitional Cell / Q000097:blood / Q000401:mortality / Q000556:secondary*; D016022:Case-Control Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D011300:Preoperative Care; D011379:Prognosis; D012372:ROC Curve; D015996:Survival Rate; D001743:Urinary Bladder / Q000378:metabolism / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000097:blood / Q000401:mortality / Q000473:pathology*; D060171:Uroplakin III / Q000097:blood*
D014408:Biomarkers, Tumor; C554660:UPK3A protein, human; D060171:Uroplakin III