Expressions of urothelial functional proteins in idiopathic detrusor overactivity patients refractory to antimuscarinic therapy with different urodynamic characteristics.

Abstract:

AIMS:This study investigated the expressions of PGP9.5, P2  X 3 , muscarinic receptor (M3) and beta-3 adrenoreceptor (AR) in idiopathic detrusor overactivity (IDO) patients refractory to antimuscarinic treatment, and analyzed the correlation between protein expressions and clinical symptoms of IDO bladders with different urodynamic characteristics. METHODS:Specimens of 48 IDO and 10 control patients without lower urinary tract symptoms were included. The levels of these proteins from bladder mucosa were determined by Western blotting. RESULTS:The expression levels of β3-AR and M3 receptor were similar between IDO patients and controls. When IDO patients were divided into two subgroups, phasic DO and terminal DO, the results showed that β3-AR level in the patients with phasic DO was significantly higher than that of the controls and terminal DO (Both P < 0.05). PGP9.5 and P2  X 3 levels were also significantly increased in phasic DO subgroup than controls. P2  X 3 receptor was positively correlated with PGP9.5 and β3-AR, and negatively correlated with the first sensation of bladder filling and voided volume in phasic DO. CONCLUSIONS:Similar expression M3 receptor and increased P2  X 3 levels in phasic DO, compared with the controls, indicate that dysregulation of purinergic bladder signaling may contribute to the pathogenesis of phasic DO refractory to antimuscarinics. Elevated expression of β3-AR in phasic DO but not in terminal DO patients may explain the different urodynamic characteristics of DO between the two subgroups. Our findings suggest that β3-AR agonist or P2  X 3 antagonist might be a good treatment choice for patients with phasic DO refractory to antimuscarinic therapy.

journal_name

Neurourol Urodyn

authors

Liu HT,Kuo HC

doi

10.1002/nau.23138

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

1313-1319

issue

5

eissn

0733-2467

issn

1520-6777

journal_volume

36

pub_type

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