Diagnosis of Parkinson’s disease and the level of oxidized DJ-1 protein

Publication date: Available online 10 July 2017
Source:Neuroscience Research
Author(s): Yuko Yamagishi, Kazumasa Saigoh, Yoshiro Saito, Ikuko Ogawa, Yoshiyuki Mitsui, Yukihiro Hamada, Makoto Samukawa, Hidekazu Suzuki, Motoi Kuwahara, Makito Hirano, Noriko Noguchi, Susumu Kusunoki
Parkinson's disease (PD) is difficult to distinguish from progressive supranuclear palsy (PSP) and multiple system atrophy (MSA); in addition, biomarker studies in PD mostly focused on those found in the cerebrospinal fluid, and there are few reports of simple biomarkers identified by blood analysis. Previously, the DJ-1 gene was identified as a causative gene of familial PD. Oxidized DJ-1 protein (oxDJ-1) levels were reported to increase in the blood of patients with unmedicated PD. Therefore, we determined the levels of oxDJ-1 in the erythrocytes of patients with PD, PSP, and MSA using ELISA. The oxDJ-1 levels were 165±117, 96±78, and 69±40ng/mg protein in the PD, PSP, and MSA groups, respectively. The mean level in disease control group was 66±31, revealing significant differences between the PD and PSP groups, the PD and MSA groups, and the PD and disease control groups. Our results indicated that oxDJ-1 levels in erythrocytes can be used as a marker for the differential diagnosis of PD.



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