Evidence map›Paper›PMID 37495586›Full record

ArticleNature communications2023

Neuroinvasion and anosmia are independent phenomena upon infection with SARS-CoV-2 and its variants.

Guilherme Dias de Melo, Victoire Perraud, Flavio Alvarez, Alba Vieites-Prado, Seonhee Kim, Lauriane Kergoat, Anthony Coleon, Bettina Salome Trüeb, Magali Tichit, Aurèle Piazza and 12 more

Erratum issuedAbstract read
In one paragraph

Article in Nature communications, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 46 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

46 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  13. Neuroimmune pathophysiology of long COVID.Psychiatry and clinical neurosciences · 2025
    Review
  14. Omicron Impacts Olfaction in Hamsters.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
    Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

22 authors.

Guilherme Dias de MeloInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0003-0747-7760
Victoire Perraud *Institut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0001-8589-5234
Flavio Alvarez *Institut Pasteur, Université Paris Cité, Channel Receptors Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0003-2950-7035
Alba Vieites-Prado *Institut du Cerveau et de la Moelle Épinière, Laboratoire de Plasticité Structurale, , Sorbonne Université, INSERM U1127, CNRS UMR7225, 75013, Paris, France.ORCID http://orcid.org/0000-0002-8807-3321
Seonhee KimInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0002-7185-7381
Lauriane KergoatInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0002-5609-4398
Anthony ColeonInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0009-0003-7392-6584
Bettina Salome TrüebInstitute of Virology and Immunology (IVI), Bern, Switzerland; Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.
Magali TichitInstitut Pasteur, Université Paris Cité, Histopathology Platform, F-75015, Paris, France.
Aurèle PiazzaInstitut Pasteur, Université Paris Cité, Spatial Regulation of Genomes Laboratory, F-75015, Paris, France.
Agnès ThierryInstitut Pasteur, Université Paris Cité, Spatial Regulation of Genomes Laboratory, F-75015, Paris, France.
David HardyInstitut Pasteur, Université Paris Cité, Histopathology Platform, F-75015, Paris, France.
Nicolas WolffInstitut Pasteur, Université Paris Cité, Channel Receptors Unit, F-75015, Paris, France.
Sandie MunierInstitut Pasteur, Université Paris Cité, Molecular Genetics of RNA viruses Unit, F-75015, Paris, France.
Romain KoszulInstitut Pasteur, Université Paris Cité, Spatial Regulation of Genomes Laboratory, F-75015, Paris, France.ORCID http://orcid.org/0000-0002-3086-1173
Etienne Simon-LorièreInstitut Pasteur, Université Paris Cité, Evolutionary Genomics of RNA Viruses Group, F-75015, Paris, France.ORCID http://orcid.org/0000-0001-8420-7743
Volker ThielMultidisciplinary Center for Infectious Diseases, University of Bern, Bern, Switzerland.ORCID http://orcid.org/0000-0002-5783-0887
Marc LecuitInstitut Pasteur, Université Paris Cité, Inserm U1117, Biology of Infection Unit, 75015, Paris, France.ORCID http://orcid.org/0000-0002-4491-1063
Pierre-Marie LledoInstitut Pasteur, Université Paris Cité, Perception and Memory Unit, F-75015 Paris, France; CNRS UMR3571, 75015, Paris, France.
Nicolas RenierInstitut du Cerveau et de la Moelle Épinière, Laboratoire de Plasticité Structurale, , Sorbonne Université, INSERM U1127, CNRS UMR7225, 75013, Paris, France.ORCID http://orcid.org/0000-0003-2642-4402
Florence LarrousInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France.ORCID http://orcid.org/0000-0003-0881-4263
Hervé BourhyInstitut Pasteur, Université Paris Cité, Lyssavirus Epidemiology and Neuropathology Unit, F-75015, Paris, France. herve.bourhy@pasteur.fr.ORCID http://orcid.org/0000-0002-2608-5589

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Anosmia was identified as a hallmark of COVID-19 early in the pandemic, however, with the emergence of variants of concern, the clinical profile induced by SARS-CoV-2 infection has changed, with anosmia being less frequent. Here, we assessed the clinical, olfactory and neuroinflammatory conditions of golden hamsters infected with the original Wuhan SARS-CoV-2 strain, its isogenic ORF7-deletion mutant and three variants: Gamma, Delta, and Omicron/BA.1. We show that infected animals develop a variant-dependent clinical disease including anosmia, and that the ORF7 of SARS-CoV-2 contributes to the induction of olfactory dysfunction. Conversely, all SARS-CoV-2 variants are neuroinvasive, regardless of the clinical presentation they induce. Taken together, this confirms that neuroinvasion and anosmia are independent phenomena upon SARS-CoV-2 infection. Using newly generated nanoluciferase-expressing SARS-CoV-2, we validate the olfactory pathway as a major entry point into the brain in vivo and demonstrate in vitro that SARS-CoV-2 travels retrogradely and anterogradely along axons in microfluidic neuron-epithelial networks.

Indexed as

COVID-19SARS-CoV-2AnimalsAxonsCricetinaeGenetic VariationGenome, ViralOlfactory BulbViral LoadVirus Internalization

Identifiers

PMID37495586
PMCPMC10372078

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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.