Cerebrospinal fluid proteomic patterns discriminate Parkinson's disease and multiple system atrophy.
The differential diagnosis of Parkinson's disease and multiple system atrophy can be challenging, especially in the early stages of the diseases. We developed a proteomic profiling strategy for parkinsonian diseases using mass spectrometry analysis for magnetic-bead-based enrichment of cerebrospinal fluid peptides/proteins and subsequent multivariate statistical analysis. Cerebrospinal fluid was obtained from 37 patients diagnosed with Parkinson's disease, 32 patients diagnosed with multiple system atrophy, and 26 patients diagnosed with other neurological diseases as controls. The samples were from the first cohort and the second cohort. Cerebrospinal fluid peptides/proteins were purified with C8 magnetic beads, and spectra were obtained by matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Principal component analysis and support vector machine methods are used to reduce dimension of the data and select features to classify diseases. Cerebrospinal fluid proteomic profiles of Parkinson's disease, multiple system atrophy, and control were differentiated from each other by principal component analysis. By building a support vector machine classifier, 3 groups were classified effectively with good cross-validation accuracy. The model accuracy was well preserved for both cases, training by the first cohort and validated by the second cohort and vice versa. Receiver operating characteristics proved that the peak of m/z 6250 was the most important to differentiate multiple system atrophy from Parkinson's disease, especially in the early stages of the disease. A proteomic pattern classification method can increase the accuracy of clinical diagnosis of Parkinson's disease and multiple system atrophy, especially in the early stages.
Department of Neurology, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan.
Noriko
N
Ishigami
Takahiko
T
Tokuda
Masaya
M
Ikegawa
Mika
M
Komori
Takashi
T
Kasai
Takayuki
T
Kondo
Yumiko
Y
Matsuyama
Takashi
T
Nirasawa
Herbert
H
Thiele
Kei
K
Tashiro
Masanori
M
Nakagawa
D000368:Aged; D002556:Cerebrospinal Fluid Proteins / Q000134:cerebrospinal fluid*; D015331:Cohort Studies; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged; D019578:Multiple System Atrophy / Q000134:cerebrospinal fluid* / Q000175:diagnosis*; D010300:Parkinson Disease / Q000134:cerebrospinal fluid* / Q000175:diagnosis*; D025341:Principal Component Analysis; D040901:Proteomics / Q000379:methods*; D015203:Reproducibility of Results
D002556:Cerebrospinal Fluid Proteins