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GFAP and NfL as fluid biomarkers for clinical disease severity and disease progression in multiple system atrophy (MSA)

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Abstract

Background

Multiple system atrophy (MSA), an atypical parkinsonian syndrome, is a rapidly progressive neurodegenerative disease with currently no established fluid biomarkers available. MSA is characterized by an oligodendroglial α-synucleinopathy, progressive neuronal cell loss and concomitant astrocytosis. Here, we investigate glial fibrillary acidic protein (GFAP) and neurofilament light chain (NfL) as fluid biomarkers for differential diagnosis, assessment of clinical disease severity and prediction of disease progression in MSA.

Methods

GFAP and NfL levels were analyzed in plasma and CSF samples of 47 MSA patients as well as 24 Parkinson’s disease (PD) and 25 healthy controls (HC) as reference cohorts. In MSA, biomarker levels were correlated to baseline and longitudinal clinical disease severity (UMSARS scores).

Results

In MSA, GFAP levels in CSF and plasma predicted baseline clinical disease severity as indicated by UMSARS scores, while NfL levels predicted clinical disease progression as indicated by longitudinal changes in UMSARS scores. Cross-sectionally, NfL levels in CSF and plasma were significantly elevated in MSA compared to both PD and HC. Receiver operating curves (ROC) indicated high diagnostic accuracy of NfL for distinguishing MSA from PD (CSF: AUC = 0.97, 95% CI 0.90–1.00; plasma: AUC = 0.90, 95% CI 0.81–1.00).

Discussion

In MSA, GFAP shows promise as novel biomarker for assessing current clinical disease severity, while NfL might serve as biomarker for prediction of disease progression and differential diagnosis of MSA against PD.
Title
GFAP and NfL as fluid biomarkers for clinical disease severity and disease progression in multiple system atrophy (MSA)
Authors
Sabrina Katzdobler
Georg Nübling
Martin Klietz
Urban M. Fietzek
Carla Palleis
Alexander M. Bernhardt
Florian Wegner
Meret Huber
Sophia Rogozinski
Luisa-Sophie Schneider
Eike Jakob Spruth
Aline Beyle
Ina R. Vogt
Moritz Brandt
Niels Hansen
Wenzel Glanz
Kathrin Brockmann
Annika Spottke
Daniel C. Hoffmann
Oliver Peters
Josef Priller
Jens Wiltfang
Emrah Düzel
Anja Schneider
Björn Falkenburger
Thomas Klockgether
Thomas Gasser
Brigitte Nuscher
Christian Haass
Günter Höglinger
Johannes Levin
Publication date
10-09-2024
Publisher
Springer Berlin Heidelberg
Published in
Journal of Neurology / Issue 10/2024
Print ISSN: 0340-5354
Electronic ISSN: 1432-1459
DOI
https://doi.org/10.1007/s00415-024-12647-z
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