Details

Autor(en) / Beteiligte

• Kronimus, Yannick
• Albus, Alexandra
• Balzer-Geldsetzer, Monika
• Straub, Sarah
• Semler, Elisa
• Otto, Markus
• Klotsche, Jens
• Dodel, Richard
• Mengel, David
• Kahle, Philipp J.

Titel

Naturally Occurring Autoantibodies against Tau Protein Are Reduced in Parkinson's Disease Dementia

Ist Teil von

• PloS one, 2016-11, Vol.11 (11), p.e0164953-e0164953

Ort / Verlag

United States: Public Library of Science

Erscheinungsjahr

2016

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• Altered levels of naturally occurring autoantibodies (nAbs) against disease-associated neuronal proteins have been reported for neurodegenerative diseases, such as Alzheimer's (AD) and Parkinson's disease (PD). Recent histopathologic studies suggest a contribution of both Lewy body- and AD-related pathology to Parkinson's disease dementia (PDD). Therefore, we explored nAbs against alpha-synuclein (αS), tau and β-amyloid (Aβ) in PDD compared to cognitively normal PD patients. We established three different ELISAs to quantify the nAbs-tau, nAbs-αS, and nAbs-Aβ levels and avidity towards their specific antigen in serum samples of 18 non-demented (PDND) and 18 demented PD patients (PDD), which were taken from an ongoing multi-center cohort study (DEMPARK/LANDSCAPE). PDD patients had significantly decreased nAbs-tau serum levels compared to PDND patients (p = 0.007), whereas the serum titers of nAbs-αS and nAbs-Aβ were unchanged. For all three nAbs, no significant differences in avidity were found between PDD and PDND cohorts. However, within both patient groups, nAbs-tau showed lowest avidity to their antigen, followed by nAbs-αS, and nAbs-Aβ. Though, due to a high interassay coefficient of variability and the exclusion of many samples below the limit of detection, conclusions for nAbs-Aβ are only conditionally possible. We detected a significantly decreased nAbs-tau serum level in PDD patients, indicating a potential linkage between nAbs-tau serum titer and cognitive deficits in PD. Thus, further investigation in larger samples is justified to confirm our findings.