Evidence map›Paper›PMID 33606070›Full record

ArticleJournal of neurology2021

Serum and CSF alpha-synuclein levels do not change in COVID-19 patients with neurological symptoms.

V A Blanco-Palmero, F J Azcárate-Díaz, M Ruiz-Ortiz, M I Laespada-García, P Rábano-Suárez, A Méndez-Guerrero, M Aramendi-Ramos, J L Eguiburu, A Pérez-Rivilla, A Marchán-López and 3 more

Open access · bronzeAbstract read
In one paragraph

Article in Journal of neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 9% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 24 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Pathophysiology of COVID-19-Related Extrapyramidal Disorders.Advances in experimental medicine and biology · 2024
    Review
  7. Review
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Covid-19 Infection and Parkinsonism: Is There a Link?Movement disorders : official journal of the Movement Disorder Society · 2021
    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

13 authors at 2 institutions in 1 country.

V A Blanco-PalmeroDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain. victorantonio.blanco@salud.madrid.org.ORCID http://orcid.org/0000-0002-1721-6217
F J Azcárate-DíazDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
M Ruiz-OrtizDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
M I Laespada-GarcíaDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
P Rábano-SuárezDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
A Méndez-GuerreroDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
M Aramendi-RamosDepartment of Clinical Analysis, Hospital Universitario 12 de Octubre, Madrid, Spain.
J L EguiburuDepartment of Clinical Analysis, Hospital Universitario 12 de Octubre, Madrid, Spain.
A Pérez-RivillaDepartment of Microbiology, Hospital Universitario 12 de Octubre, Madrid, Spain.
A Marchán-LópezDepartment of Internal Medicine, Hospital Universitario 12 de Octubre, Madrid, Spain.
M Rubio-FernándezGroup of Neurodegenerative Diseases, Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain.
E CarroGroup of Neurodegenerative Diseases, Instituto de Investigación Hospital 12 de Octubre (i+12), Madrid, Spain.
J González de la AlejaDepartment of Neurology, Hospital Universitario 12 de Octubre, Avda. de Córdoba, s/n 28041, Madrid, Spain.
Hospital Universitario 12 De Octubre · ESResearch Institute Hospital 12 de Octubre · ES

Funding

Instituto de Salud Carlos III CM18/0095
6 · The paper itself

Abstract

SARS-CoV-2 infection can associate diverse neurological manifestations. Several studies have provided proof to support the theory of neurotropic involvement of SARS-CoV-2. Alpha-synuclein has been described as a native antiviral factor within neurons, and upregulation of this protein can be seen in animals that suffered other neuroinvasive infections. To assess if increased expression of this protein takes place in COVID-19 patients with neurological symptoms, we analyzed serum total alpha-synuclein levels in three groups: seven COVID-19 patients with myoclonus, Parkinsonism and/or encephalopathy; thirteen age- and sex-matched COVID-19 patients without neurological involvement and eight age- and sex-matched healthy controls. We did not find differences among them. In a subset of four patients, the change in serum alpha-synuclein before and after the onset of neurological symptoms was not significant either. Cerebrospinal fluid alpha-synuclein levels were also similar between neurological COVID-19 and healthy controls. Overall, these results cannot support the hypothesis of alpha-synuclein upregulation in humans with neurological symptoms in COVID-19. Further research taking into account a larger group of COVID-19 patients including the whole spectrum of neurological manifestations and disease severity is needed.

Indexed as

Brain DiseasesCOVID-19alpha-SynucleinAnimalsHumansNeuronsSARS-CoV-2alpha-SynucleinAlpha-synucleinCOVID-19MyoclonusParkinsonismSARS-CoV-2Virus

Identifiers

PMID33606070
PMCPMC7892700
OpenAlexW3131400794

What OpenQuestion holds

Textmetadata
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.