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Differences in Cerebrospinal Fluid Biomarkers between Clinically Diagnosed Idiopathic Normal Pressure Hydrocephalus and Alzheimer's Disease | OMICS International | Abstract
ISSN: 2161-0460

Journal of Alzheimers Disease & Parkinsonism
Open Access

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Research Article

Differences in Cerebrospinal Fluid Biomarkers between Clinically Diagnosed Idiopathic Normal Pressure Hydrocephalus and Alzheimer's Disease

Andrew Tsai, Michael Malek-Ahmadi, Vickram Kahlon and Marwan N Sabbagh*
The Cleo Roberts Center for Clinical Research, Banner-Sun Health Research Institute, AZ, USA
Corresponding Author : Marwan N. Sabbagh
The Cleo Roberts Center for Clinical Research
Banner Sun Health Research Institute
10515 West Santa Fe Drive, Sun City, AZ, 85351, USA
Tel: (623) 875-6500
Fax: (623) 875-6504
E-mail: [email protected]
Received March 24, 2014; Accepted April 28, 2014; Published May 30, 2014
Citation: Tsai A, Malek-Ahmadi M, Kahlon V, Sabbagh MN (2014) Differences in Cerebrospinal Fluid Biomarkers between Clinically Diagnosed Idiopathic Normal Pressure Hydrocephalus and Alzheimer’s Disease. J Alzheimers Dis Parkinsonism 4: 150. doi: 10.4172/2161-0460.1000150
Copyright: © 2014 Tsai A, et al., This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Objective: In the present study, cerebrospinal fluid (CSF) profiles were assessed to determine how idiopathic normal pressure hydrocephalus (NPH) and Alzheimer’s disease (AD) differs. Methods: Subjects were drawn from patients who underwent lumbar punctures as part of their diagnostic evaluations in the Banner Sun Health Research Institute Memory Disorders clinic. The clinical sample included 11 iNPH subjects (mean age 81.36 ± 2.58) and 11 AD subjects (mean age 61.46 ± 8.24). Concentrations of amyloid-β (Aβ42), total-tau (t-tau), phospho-tau181 (p-tau) Aβ42, and an Aβ42-Tau Index (ATI) were measured by commercial assay (Athena Diagnostics). and compared to each other. The Mann-Whitney test was used to assess group differences on the raw values for Aβ42, t-tau, p-tau, ATI, age, education, and MMSE. Results: In a univariate analysis, p-tau was found to be significantly (P = 0.009) lower in patients diagnosed with iNPH than those with AD. Amyloid-β (Aβ42), total-tau (t-tau) did not differ between groups. In multi-variate analysis, the differences in p-tau between groups did not differ. Conclusion: Although age could represent a significant confound, p-tau is significantly lower in iNPH compared to AD. P-tau would be expected to increase with age but in this sample is lower suggesting the difference might be explained by the underlying condition.

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