Evidence map›Paper›PMID 33122999›Full record

ArticleFrontiers in neuroanatomy2020

Histological Evidence for the Enteric Nervous System and the Choroid Plexus as Alternative Routes of Neuroinvasion by SARS-CoV2.

Felix Deffner, Melanie Scharr, Stefanie Klingenstein, Moritz Klingenstein, Alfio Milazzo, Simon Scherer, Andreas Wagner, Bernhard Hirt, Andreas F Mack, Peter H Neckel

Abstract read
In one paragraph

Article in Frontiers in neuroanatomy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
49citing 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

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

  1. Pooled it
  2. Review
  3. Neuroimmune pathophysiology of long COVID.Psychiatry and clinical neurosciences · 2025
    Review
  4. Review
  5. Article
  6. Article
  7. Review
  8. Review
  9. Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. Enteric nervous system as a target and source of SARS-CoV-2 and other viral infections.American journal of physiology. Gastrointestinal and liver physiology · 2023
    Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. 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

10 authors.

Felix DeffnerInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
Melanie ScharrInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
Stefanie KlingensteinInstitute of Neuroanatomy and Developmental Biology, University of Tübingen, Tübingen, Germany.
Moritz KlingensteinInstitute of Neuroanatomy and Developmental Biology, University of Tübingen, Tübingen, Germany.
Alfio MilazzoInstitute of Neuroanatomy and Developmental Biology, University of Tübingen, Tübingen, Germany.
Simon SchererDepartment of Pediatric Surgery, University Children's Hospital, Tübingen, Germany.
Andreas WagnerInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
Bernhard HirtInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
Andreas F MackInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.
Peter H NeckelInstitute of Clinical Anatomy and Cell Analysis, University of Tübingen, Tübingen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Evidence is mounting that the novel corona virus SARS-CoV2 inflicts neurological symptoms in a subgroup of COVID-19 patients. While plenty of theories on the route of neuroinvasion have been proposed, little histological evidence has been presented supporting any of these hypotheses. Therefore, we carried out immunostainings for ACE2 and TMPRSS2, two proteinases crucial for the entry of SARS-CoV2 into host cells, in the human enteric nervous system (ENS), as well as in the choroid plexus of the lateral ventricles. Both of these sites are important, yet often neglected entry gates to the nervous system. We found that ACE2 and TMPRSS2 are expressed by enteric neurons and glial cells of the small and large intestine, as well as choroid plexus epithelial cells, indicating that these cells meet the molecular requirements for viral entry. Together, our results are fundamental histological evidence substantiating current theories of neuroinvasion by SARS-CoV2.

Indexed as

choroid plexusenteric nervous systemneuro-COVIDneuroinvasionSARS-CoV2

Identifiers

PMID33122999
PMCPMC7573115

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.