Evidence map›Paper›PMID 34267758›Full record

ArticleFrontiers in immunology2021

Limitations of a Commercial Assay as Diagnostic Test of Autoimmune Encephalitis.

Raquel Ruiz-García, Guillermo Muñoz-Sánchez, Laura Naranjo, Mar Guasp, Lidia Sabater, Albert Saiz, Josep Dalmau, Francesc Graus, Eugenia Martinez-Hernandez

Open access · goldAbstract read
In one paragraph

Article in Frontiers in immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 3 pooled it
6.9field-weighted citation impact, top 2% 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

47 citing papers in PubMed, 3 syntheses or guidelines pooled it, 82 citations in OpenAlex.

  1. Pooled it
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  16. Anti-IgLON5 Disease 10 Years Later: What We Know and What We Do Not Know.Neurology(R) neuroimmunology & neuroinflammation · 2025
    Review
  17. Article
  18. Review
  19. Article
  20. Recent advances in autoimmune encephalitis.Arquivos de neuro-psiquiatria · 2024
    Review
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

9 authors at 5 institutions in 2 countries.

Raquel Ruiz-GarcíaImmunology Department, Centre Diagnòstic Biomèdic, Hospital Clínic, Barcelona, ​​Spain.
Guillermo Muñoz-SánchezImmunology Department, Centre Diagnòstic Biomèdic, Hospital Clínic, Barcelona, ​​Spain.
Laura NaranjoImmunology Department, Centre Diagnòstic Biomèdic, Hospital Clínic, Barcelona, ​​Spain.
Mar GuaspNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Lidia SabaterNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Albert SaizNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Josep DalmauNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Francesc GrausNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Eugenia Martinez-HernandezNeuroimmunology Program, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, ​​Spain.
Hospital Clínic de Barcelona · ESConsorci Institut D'Investigacions Biomediques August Pi I Sunyer · ESUniversitat de Barcelona · ESCentre for Biomedical Network Research on Rare Diseases · ESCentro de Investigación Biomédica en Red · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Detection of neuronal surface antibodies (NSAb) is important for the diagnosis of autoimmune encephalitis (AE). Although most clinical laboratories use a commercial diagnostic kit (Euroimmun, Lübeck, Germany) based on indirect immunofluorescence on transfected cells (IIFA), clinical experience suggests diagnostic limitations. Here, we assessed the performance of the commercial IIFA in serum and CSF samples of patients with suspected AE previously examined by rat brain immunohistochemistry (Cohort A). Of 6213 samples, 404 (6.5%) showed brain immunostaining suggestive of NSAb: 163 (40%) were positive by commercial IIFA and 241 (60%) were negative. When these 241 samples were re-assessed with in-house IIFA, 42 (18%) were positive: 21 (9%) had NSAb against antigens not included in the commercial IIFA and the other 21 (9%) had NSAb against antigens included in the commercial kit (false negative results). False negative results occurred more frequently with CSF (29% vs 10% in serum) and predominantly affected GABA

Indexed as

AdultAgedAged, 80 and overAnimalsAutoantibodiesBiological AssayBrainDiagnostic Tests, RoutineEncephalitisFemaleHashimoto DiseaseHumansIntracellular Signaling Peptides and ProteinsMaleMiddle AgedNeuronsanti-leucine-rich glioma-inactivated 1 autoantibodyAutoantibodiesIntracellular Signaling Peptides and ProteinsLGI1 protein, humanReceptors, AMPAReceptors, GABA-Bautoimmune encephalitis (AE)brain immunohistochemistrydiagnostic testimmunofluorescent assayneuronal antibodies

Identifiers

PMID34267758
PMCPMC8276168
OpenAlexW3173470913

What OpenQuestion holds

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Registered trials

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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.