The aim of the present study was to determine the relation of urinary dysfunction with motor symptoms and nigrostriatal neuron loss in drug-naïve patients with Parkinson's disease (PD). We therefore examined the relation of overactive bladder (OAB) symptoms with motor symptoms and striatal dopamine transporter (DAT) binding measured by [123-Iodine]-fluoropropyl-2beta-carbomethoxy-3beta-(4-iodophenylnortropane) dopamine transporter single-photon emission computed tomography (123I-FP-CIT SPECT).
Thirty-one untreated PD patients (12 men and 19 women with a mean age of 71.2 ± 6.7 years) were included in this study. Patients were evaluated with overactive bladder symptom score (OABSS) and divided into an OAB group and Non-OAB group. They underwent clinical assessments and123I-FP-CIT SPECT imaging. Motor symptoms were assessed using Unified Parkinson's Disease Rating Scale (UPDRS).
The results showed that UPDRS motor score (p = 0.01) and akinetic-rigid score (p = 0.002) were higher and that striatal DAT availability (p = 0.01) was lower in the OAB group than in the Non-OAB group. However, tremor score, age, and duration of PD showed no significant differences between the OAB group and Non-OAB group.
Urinary dysfunction in untreated PD is related with increase in motor symptoms (especially bradykinesia and axial symptoms) and reduction of striatal DAT availability.
Parkinsonism & related disorders. 2018 Feb 09 [Epub ahead of print]
Yasunori Mito, Ichiro Yabe, Hiroaki Yaguchi, Toshiki Takei, Satoshi Terae, Yasutaka Tajima
Department of Neurology, Sapporo City General Hospital, Kita 11-Nishi 13, Chuo Ku, Sapporo, Hokkaido, 060-8604, Japan. Electronic address: ., Department of Neurology, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan., Department of Neurology, Sapporo City General Hospital, Kita 11-Nishi 13, Chuo Ku, Sapporo, Hokkaido, 060-8604, Japan., Department of Diagnostic Radiology, Sapporo City General Hospital, Sapporo, Hokkaido, Japan.