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The Significance of Oxidized DJ-1 Protein (oxDJ-1) as a Biomarker for Parkinson's Disease Ikuko Ogawa 1 , Yoshiro Saito 2 , Kazumasa Saigoh 1 , Yoshie Hosoi 1 , Yoshiyuki Mitsui 1 , Noriko Noguchi 2 , Susumu Kusunoki 1 1Department of Neurology, Kinki University Faculty of Medicine 2Department of Medical Life Systems, Faculty of Medical and Life Sciences, Doshisha University Keyword: パーキンソン病 , 酸化DJ-1(oxDJ-1) , 遺伝子 , バイオマーカー , MIBG心筋シンチグラフィー , Parkinson's disease , oxidized DJ-1(oxDJ-1) , gene , biomarker , MIBG scintigraphy pp.471-477
Published Date 2014/4/1
DOI https://doi.org/10.11477/mf.1416101775
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Abstract

The search for biomarkers of Parkinson's disease (PD) typically focuses on cerebrospinal fluid components, with very few reports on simple biomarkers identifiable by blood analysis. In this report, we determined the level of oxidized DJ-1 protein (oxDJ-1) in red blood cells by ELISA and examined the association with MIBG myocardial scintigraphy. Levels of oxDJ-1 were higher in unmedicated patients with PD (142.2 ± 21.8 ng oxDJ-1/mg protein; n = 13) compared to the L-DOPA-treated group (85.6 ± 10.1 ng oxDJ-1/mg protein; n = 10) and controls (56.0 ± 6.2 ng oxDJ-1/mg protein; n = 17), thereby showing significant intergroup differences. Intervention with L-DOPA showed a tendency to decrease oxDJ-1 levels in patients. The diagnostic sensitivity of oxDJ-1 measurement was 87% and that of simultaneously conducted MIBG scintigraphy was 89%; this showed that the diagnostic sensitivity was comparable. Our results showed that measurement of oxDJ-1 levels in red blood cells can be useful and oxDJ-1 can be used as a biomarker for the early diagnosis of PD. (Receieved July 31, 2013; Accepted October 16, 2013; Published April 1, 2014)


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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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