Evidence map›Paper›PMID 34696455›Full record

ArticleViruses2021

Spike Proteins of SARS-CoV-2 Induce Pathological Changes in Molecular Delivery and Metabolic Function in the Brain Endothelial Cells.

Eun Seon Kim, Min-Tae Jeon, Kyu-Sung Kim, Suji Lee, Suji Kim, Do-Geun Kim

Open access · goldAbstract read
In one paragraph

Article in Viruses, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
6.1field-weighted citation impact, top 3% 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

43 citing papers in PubMed, 68 citations in OpenAlex.

  1. Article
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  5. iPSC-derived human cortical organoids display profound alterations of cellular homeostasis following SARS-CoV-2 infection and Spike protein exposure.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
    Article
  6. Article
  7. Article
  8. Article
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  10. Differential Cytokine Responses of APOE3 and APOE4 Blood-brain Barrier Cell Types to SARS-CoV-2 Spike Proteins.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2024
    Article
  11. Review
  12. Infectious Diseases.Advances in neurobiology · 2024
    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

6 authors at 3 institutions in 2 countries.

Eun Seon KimNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Min-Tae JeonNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Kyu-Sung KimNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Suji LeeNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Suji KimNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Do-Geun KimNeuroimmunology Laboratory, Dementia Research Group, Korea Brain Research Institute, Sinseo, Daegu 41062, Korea.
Korea Brain Research Institute · KRDaegu Gyeongbuk Institute of Science and Technology · KRKing's College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), which causes the coronavirus disease (COVID-19), is currently infecting millions of people worldwide and is causing drastic changes in people's lives. Recent studies have shown that neurological symptoms are a major issue for people infected with SARS-CoV-2. However, the mechanism through which the pathological effects emerge is still unclear. Brain endothelial cells (ECs), one of the components of the blood-brain barrier, are a major hurdle for the entry of pathogenic or infectious agents into the brain. They strongly express angiotensin converting enzyme 2 (ACE2) for its normal physiological function, which is also well-known to be an opportunistic receptor for SARS-CoV-2 spike protein, facilitating their entry into host cells. First, we identified rapid internalization of the receptor-binding domain (RBD) S1 domain (S1) and active trimer (Trimer) of SARS-CoV-2 spike protein through ACE2 in brain ECs. Moreover, internalized S1 increased Rab5, an early endosomal marker while Trimer decreased Rab5 in the brain ECs. Similarly, the permeability of transferrin and dextran was increased in S1 treatment but decreased in Trimer, respectively. Furthermore, S1 and Trimer both induced mitochondrial damage including functional deficits in mitochondrial respiration. Overall, this study shows that SARS-CoV-2 itself has toxic effects on the brain ECs including defective molecular delivery and metabolic function, suggesting a potential pathological mechanism to induce neurological signs in the brain.

Indexed as

Angiotensin-Converting Enzyme 2AnimalsBlood-Brain BarrierBrainCOVID-19Endothelial CellsHumansMiceMitochondriaProtein Domainsrab5 GTP-Binding ProteinsSARS-CoV-2Spike Glycoprotein, CoronavirusACE2 protein, humanAngiotensin-Converting Enzyme 2RAB5C protein, humanrab5 GTP-Binding ProteinsSpike Glycoprotein, Coronavirusspike protein, SARS-CoV-2BBBCOVID-19endothelial cellsmetabolismSARS-CoV-2

Identifiers

PMID34696455
PMCPMC8538996
OpenAlexW3204617365

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.