Evidence map›Paper›PMID 29125493›Full record

ArticleJournal of Huntington's disease2017

Validation of Ultrasensitive Mutant Huntingtin Detection in Human Cerebrospinal Fluid by Single Molecule Counting Immunoassay.

Valentina Fodale, Roberto Boggio, Manuel Daldin, Cristina Cariulo, Maria Carolina Spiezia, Lauren M Byrne, Blair R Leavitt, Edward J Wild, Douglas Macdonald, Andreas Weiss and 1 more

Open access · bronzeAbstract readValidation Study
In one paragraph

Article in Journal of Huntington's disease, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 61 citations in OpenAlex.

  1. Systematic Review with Meta-Analysis of Biofluid Markers for Huntington's Disease.Movement disorders : official journal of the Movement Disorder Society · 2025
    Pooled it
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  17. Spinocerebellar ataxia clinical trials: opportunities and challenges.Annals of clinical and translational neurology · 2021
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 4 institutions in 4 countries.

Valentina FodaleIRBM Science Park, Pomezia, Rome, Italy.
Roberto BoggioIRBM Promidis, Pomezia, Rome, Italy.
Manuel DaldinIRBM Science Park, Pomezia, Rome, Italy.
Cristina CariuloIRBM Science Park, Pomezia, Rome, Italy.
Maria Carolina SpieziaIRBM Science Park, Pomezia, Rome, Italy.
Lauren M ByrneUniversity College London (UCL) Institute of Neurology, National Hospital for Neurology and Neurosurgery, London, UK.
Blair R LeavittDepartment of Medical Genetics, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, BC, Canada.
Edward J WildUniversity College London (UCL) Institute of Neurology, National Hospital for Neurology and Neurosurgery, London, UK.
Douglas MacdonaldCHDIManagement/CHDI Foundation, Los Angeles, CA, USA.
Andreas WeissIRBM Promidis, Pomezia, Rome, Italy.
Alberto BrescianiIRBM Science Park, Pomezia, Rome, Italy.
IRBM Science Park · ITNational Hospital for Neurology and Neurosurgery · GBCHDI Foundation · USUniversity of British Columbia · CA

Funding

Medical Research Council MR/M008592/1
6 · The paper itself

Abstract

backgroundThe measurement of disease-relevant biomarkers has become a major component of clinical trial design, but in the absence of rigorous clinical and analytical validation of detection methodology, interpretation of results may be misleading. In Huntington's disease (HD), measurement of the concentration of mutant huntingtin protein (mHTT) in cerebrospinal fluid (CSF) of patients may serve as both a disease progression biomarker and a pharmacodynamic readout for HTT-lowering therapeutic approaches. We recently published the quantification of mHTT levels in HD patient CSF by a novel ultrasensitive immunoassay-based technology and here analytically validate it for use.

objectiveThis work aims to analytically and clinically validate our ultrasensitive assay for mHTT measurement in human HD CSF, for application as a pharmacodynamic biomarker of CNS mHTT lowering in clinical trials.

methodsThe single molecule counting (SMC) assay is an ultrasensitive bead-based immunoassay where upon specific recognition, dye-labeled antibodies are excited by a confocal laser and emit fluorescent light as a readout. The detection of mHTT by this technology was clinically validated following established Food and Drug Administration and European Medicine Agency guidelines.

resultsThe SMC assay was demonstrated to be accurate, precise, specific, and reproducible. While no matrix influence was detected, a list of interfering substances was compiled as a guideline for proper collection and storage of patient CSF samples. In addition, a set of recommendations on result interpretation is provided.

conclusionsThis SMC assay is a robust and ultrasensitive method for the relative quantification of mHTT in human CSF.

Indexed as

BiomarkersCalibrationFibroblastsGene SilencingHumansHuntingtin ProteinHuntington DiseaseImmunoassayRecombinant ProteinsReproducibility of ResultsRNA, Small InterferingSensitivity and SpecificityTrinucleotide Repeat ExpansionBiomarkersHTT protein, humanHuntingtin ProteinRecombinant ProteinsRNA, Small InterferingAssay validationbiomarkercerebrospinal fluidhuntingtin proteinHuntington’s diseaseimmunoassaymutant huntingtinpolyglutamineultrasensitive assay

Identifiers

PMID29125493
PMCPMC5757651
OpenAlexW2767946212

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.