TY  - GEN
TI  - Brain-derived neurotrophic factor in cerebrospinal fluid and plasma is not a biomarker for Huntington's disease
N1  - The copyright holder for this preprint is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license (http://creativecommons.org/licenses/by/4.0/).
Y1  - 2020/11/04/
UR  - https://doi.org/10.1101/2020.11.02.20222166
N2  - Brain-derived neurotrophic factor (BDNF) is implicated in the survival of striatal neurons. BDNF function is reduced in Huntington?s disease (HD), possibly because mutant huntingtin impairs its cortico-striatal transport, contributing to striatal neurodegeneration. The BDNF trophic pathway is a therapeutic target, and blood BDNF has been suggested as a potential biomarker for HD, but BDNF has not been quantified in cerebrospinal fluid (CSF) in HD.

BDNF in CSF and plasma in the HD-CSF cohort (20 pre-manifest and 40 manifest HD mutation carriers and 20 age and gender-matched controls) were quantified using conventional ELISAs and an ultra-sensitive immunoassay.

BDNF concentration was below the limit of detection of the conventional ELISAs, raising doubt about previous CSF reports in neurodegeneration. Using the ultra-sensitive method, BDNF concentration was quantifiable in all samples but did not differ between controls and HD mutation carriers in CSF or plasma, was not associated with clinical scores or MRI brain volumetric measures, and had poor ability to discriminate controls from HD mutation carriers, and premanifest from manifest HD.

BDNF in CSF and plasma is unlikely to be a biomarker of HD progression, and urge caution in interpreting studies where conventional ELISA was used to quantify CSF BDNF.
PB  - MedRxiv
CY  - Cold Spring Harbor, NY, USA
A1  - Ou, ZYA
A1  - Byrne, LM
A1  - Rodrigues, FB
A1  - Tortelli, R
A1  - Johnson, EB
A1  - Foiani, MS
A1  - Arridge, M
A1  - De Vita, E
A1  - Scahill, RI
A1  - Heslegrave, A
A1  - Zetterberg, H
A1  - Wild, EJ
EP  - 22
ID  - discovery10114475
AV  - public
ER  -