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@ARTICLE{Herrmann:823896,
author = {Herrmann, Yvonne and Kulawik, Andreas and Kühbach, Katja
and Hülsemann, Maren and Peters, Luriano and Bujnicki,
Tuyen and Kravchenko, Kateryna and Linnartz, Christina and
Willbold, Johannes and Zafiu, Christian and Bannach, Oliver
and Willbold, Dieter},
title = {s{FIDA} automation yields sub-femtomolar limit of detection
for {A}β aggregates in body fluids},
journal = {Clinical biochemistry},
volume = {50},
number = {4-5},
issn = {0009-9120},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-06528},
pages = {244-247},
year = {2017},
abstract = {Objectives: Alzheimer's disease (AD) is a neurodegenerative
disorder with yet non-existent therapeutic and limited
diagnostic options. Reliable biomarker-based AD diagnostics
are of utmost importance for the development and application
of therapeutic substances. Wehave previously introduced a
platformtechnology designated ‘sFIDA’ for the
quantitation of amyloid β peptide (Aβ) aggregates as AD
biomarker. In this study we implemented the sFIDA assay on
an automated platform to enhance robustness and performance
of the assay.Design and methods: In sFIDA (surface-based
fluorescence intensity distribution analysis) Aβ species
are immobilized by a capture antibody to a glass surface.
Aβ aggregates are then multiply loaded with fluorescent
antibodies and quantitated by high resolution fluorescence
microscopy. As a model system for Aβ aggregates, weused
Aβ-conjugated silica nanoparticles (Aβ-SiNaPs) diluted in
PBS buffer and cerebrospinal fluid, respectively. Automation
of the assay was realized on a liquid handling system in
combination with a microplate washer.Results: The automation
of the sFIDA assay results in improved intra-assay
precision, linearity and sensitivity in comparison to the
manual application, and achieved a limit of detection in the
sub-femtomolar range.Conclusions: Automation improves the
precision and sensitivity of the sFIDA assay, which is a
prerequisite for high-throughput measurements and future
application of the technology in routine AD diagnostics.},
cin = {ICS-6},
ddc = {540},
cid = {I:(DE-Juel1)ICS-6-20110106},
pnm = {553 - Physical Basis of Diseases (POF3-553)},
pid = {G:(DE-HGF)POF3-553},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000395965100015},
pubmed = {pmid:27823959},
doi = {10.1016/j.clinbiochem.2016.11.001},
url = {https://juser.fz-juelich.de/record/823896},
}