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Use of CSF α-synuclein in the differential diagnosis between Alzheimer's disease and other neurodegenerative disorders

  • Zheng-Yu Wang (a1), Zhen-Min Han (a1), Qi-Fei Liu (a1), Wei Tang (a2), Kui Ye (a1) and Yu-You Yao (a2)...

Abstract

Background:

The etiology and pathogenesis of neurodegenerative disorders has yet to be elucidated, so their differential diagnosis is a challenge. This is especially true in differentiating Alzheimer's disease (AD), dementia with Lewy bodies (DLB), Parkinson disease (PD), and multiple system atrophy (MSA).

Methods:

A total of 11 eligible articles were identified by search of electronic databases including PubMed, Springer Link, Elsevier, and the Cochrane Library, up to June 2014. In meta-analyses, standardized mean differences (SMD), with 95% confidence intervals (CI), comparing cerebrospinal fluid (CSF) measures of α-synuclein between the above conditions were calculated using random-effects models.

Results:

CSF α-synuclein concentrations were significantly higher in AD compared to DLB [SMD: 0.32, 95% CI: (0.02, 0.62), z = 2.07, P = 0.038]; PD [SMD: 0.87, 95% CI: (0.15, 1.58), z = 2.38, P = 0.017]; or MSA [SMD: 1.14, 95% CI: (0.15, 2.14), z = 2.25, P = 0.025]. However, no significant difference was found between patients with AD and neurological cognitively normal controls [SMD: 0.02, 95% CI: (−0.21, 0.24), z = 0.13, P = 0.894].

Conclusions:

Results of these meta-analysis suggest that quantification of CSF α-synuclein could help distinguish AD from other neurodegenerative disorders such as DLB, PD, or MSA.

Copyright

Corresponding author

Correspondence should be addressed to: Yu-You Yao, M.D., Department of Clinical Laboratory Medicine, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, Anhui 230032, China. Phone: 86-551-63869179; Fax: 86-551-63869179. Email: yaoyuyoutang@sina.com.

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