Evidence map›Paper›PMID 35901083›Full record

ArticleJournal of proteome research2022

Protein Expression Profile of ACE2 in the Normal and COVID-19-Affected Human Brain.

Cecilia Lindskog, Loren Méar, Johan Virhammar, David Fällmar, Eva Kumlien, Göran Hesselager, Olivera Casar-Borota, Elham Rostami

Open access · hybridAbstract read
In one paragraph

Article in Journal of proteome research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
3.9field-weighted citation impact, top 5% 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

22 citing papers in PubMed, 31 citations in OpenAlex.

  1. Article
  2. ACE2: Friend or Foe in Post-COVID-19 Neurodegeneration?International journal of molecular sciences · 2025
    Review
  3. Neuroimmune pathophysiology of long COVID.Psychiatry and clinical neurosciences · 2025
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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

8 authors at 1 institution in 1 country.

Cecilia LindskogDepartment of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 751 85 Uppsala, Sweden.ORCID 0000-0001-5611-1015
Loren MéarDepartment of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 751 85 Uppsala, Sweden.ORCID 0000-0001-9333-0110
Johan VirhammarDepartment of Neuroscience, Neurology, Uppsala University, 751 85 Uppsala, Sweden.
David FällmarDepartment of Surgical Sciences, Radiology, Uppsala University, 751 85 Uppsala, Sweden.
Eva KumlienDepartment of Neuroscience, Neurology, Uppsala University, 751 85 Uppsala, Sweden.
Göran HesselagerDepartment of Neuroscience, Neurosurgery, Uppsala University, 751 85 Uppsala, Sweden.
Olivera Casar-BorotaDepartment of Immunology, Genetics and Pathology, Rudbeck Laboratory, Uppsala University, 751 85 Uppsala, Sweden.
Elham RostamiDepartment of Neuroscience, Neurosurgery, Uppsala University, 751 85 Uppsala, Sweden.
Uppsala University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

SARS-coronavirus 2 (SARS-CoV-2) that caused the coronavirus disease 2019 (COVID-19) pandemic has posed to be a global challenge. An increasing number of neurological symptoms have been linked to the COVID-19 disease, but the underlying mechanisms of such symptoms and which patients could be at risk are not yet established. The suggested key receptor for host cell entry is angiotensin I converting enzyme 2 (ACE2). Previous studies on limited tissue material have shown no or low protein expression of ACE2 in the normal brain. Here, we used stringently validated antibodies and immunohistochemistry to examine the protein expression of ACE2 in all major regions of the normal brain. The expression pattern was compared with the COVID-19-affected brain of patients with a varying degree of neurological symptoms. In the normal brain, the expression was restricted to the choroid plexus and ependymal cells with no expression in any other brain cell types. Interestingly, in the COVID-19-affected brain, an upregulation of ACE2 was observed in endothelial cells of certain patients, most prominently in the white matter and with the highest expression observed in the patient with the most severe neurological symptoms. The data shows differential expression of ACE2 in the diseased brain and highlights the need to further study the role of endothelial cells in COVID-19 disease in relation to neurological symptoms.

Indexed as

Angiotensin-Converting Enzyme 2COVID-19BrainEndothelial CellsHumansPeptidyl-Dipeptidase ASARS-CoV-2ACE2 protein, humanAngiotensin-Converting Enzyme 2Peptidyl-Dipeptidase AACE2antibodiesbrainCOVID-19immunohistochemistryneurologyproteomicsSARS-CoV-2transcriptomics

Identifiers

PMID35901083
PMCPMC9364976
OpenAlexW4288443359

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.