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Alzheimers Res Ther. 2016 Oct 10;8(1):42.

Prospective longitudinal course of cognition in older subjects with mild parkinsonian signs.

Author information

1
Center of Neurology, Department of Neurodegeneration and Hertie-Institute for Clinical Brain Research, University of Tuebingen, Hoppe Seyler-Strasse 3, Tuebingen, 72076, Germany. Stefanie.lerche@uni-tuebingen.de.
2
German Center for Neurodegenerative Diseases, University of Tuebingen, Otfried-Müller-Straße 27, Tuebingen, 72076, Germany. Stefanie.lerche@uni-tuebingen.de.
3
Center of Neurology, Department of Neurodegeneration and Hertie-Institute for Clinical Brain Research, University of Tuebingen, Hoppe Seyler-Strasse 3, Tuebingen, 72076, Germany.
4
German Center for Neurodegenerative Diseases, University of Tuebingen, Otfried-Müller-Straße 27, Tuebingen, 72076, Germany.
5
Neurology Unit, Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.
6
ADx NeuroSciences, Gent, 9052, Belgium.
7
EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany.
8
Geriatric Center at the University Hospital of Tübingen, Tübingen, Germany.
9
Department of Psychiatry and Psychotherapy, University Hospital of Tübingen, Tübingen, Germany.

Abstract

BACKGROUND:

Mild parkinsonian signs (MPS) are common in older people and are associated with an increased risk of different neurodegenerative diseases. This study prospectively evaluates the longitudinal course of cognitive performance in older individuals with MPS.

METHODS:

From the TREND study, 480 individuals neurologically healthy at baseline, aged between 50 and 80 years, with complete follow-up data for three assessments within a mean of 43.8 months, were included in this analysis. Participants underwent a detailed cognitive test battery, evaluation of prodromal markers for neurodegenerative diseases and history of vascular diseases at each study visit. In addition, plasma levels of amyloid-beta (Aβ)1-40 and Aβ1-42 were evaluated longitudinally.

RESULTS:

In 52 (11 %) of the 480 participants, MPS could be detected at baseline. These individuals had cognitive deficits significantly more often compared with controls at each time point and their cognitive performance showed a steeper decline during follow-up. In addition, their levels of plasma Aβ1-42 were significantly lower than those of controls, and declined more rapidly over time.

CONCLUSIONS:

This longitudinal study shows that MPS are associated with cognitive decline and decrease in plasma Aβ1-42, possibly indicating an ongoing neurodegenerative process.

KEYWORDS:

Amyloid-beta; Cohort study; Dementia; Longitudinal; Prospective

PMID:
27724983
PMCID:
PMC5057460
DOI:
10.1186/s13195-016-0209-7
[Indexed for MEDLINE]
Free PMC Article

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