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Altered levels of CSF proteins in patients with FTD, presymptomatic mutation carriers and non-carriers
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Altered levels of CSF proteins in patients with FTD, presymptomatic mutation carriers and non-carriers
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Journal Article
Altered levels of CSF proteins in patients with FTD, presymptomatic mutation carriers and non-carriers
2020
Overview
Background
The clinical presentations of frontotemporal dementia (FTD) are diverse and overlap with other neurological disorders. There are, as of today, no biomarkers in clinical practice for diagnosing the disorders. Here, we aimed to find protein markers in cerebrospinal fluid (CSF) from patients with FTD, presymptomatic mutation carriers and non-carriers.
Methods
Antibody suspension bead arrays were used to analyse 328 proteins in CSF from patients with behavioural variant FTD (bvFTD,
n
= 16) and progressive primary aphasia (PPA,
n
= 13), as well as presymptomatic mutation carriers (PMC,
n
= 16) and non-carriers (NC,
n
= 8). A total of 492 antibodies were used to measure protein levels by direct labelling of the CSF samples. The findings were further examined in an independent cohort including 13 FTD patients, 79 patients with Alzheimer’s disease and 18 healthy controls.
Results
We found significantly altered protein levels in CSF from FTD patients compared to unaffected individuals (PMC and NC) for 26 proteins. The analysis show patterns of separation between unaffected individuals and FTD patients, especially for those with a clinical diagnosis of bvFTD. The most statistically significant differences in protein levels were found for VGF, TN-R, NPTXR, TMEM132D, PDYN and NF-M. Patients with FTD were found to have higher levels of TN-R and NF-M, and lower levels of VGF, NPTXR, TMEM132D and PDYN, compared to unaffected individuals. The main findings were reproduced in the independent cohort.
Conclusion
In this pilot study, we show a separation of FTD patients from unaffected individuals based on protein levels in CSF. Further investigation is required to explore the CSF profiles in larger cohorts, but the results presented here has the potential to enable future clinical utilization of these potential biomarkers within FTD.
Publisher
BioMed Central,Springer Nature B.V,BMC
Subject
