Evidence map›Paper›PMID 34138483›Full record

ArticleJournal of medical virology2021

Soluble angiotensin-converting enzyme 2 is transiently elevated in COVID-19 and correlates with specific inflammatory and endothelial markers.

Annika Lundström, Louise Ziegler, Sebastian Havervall, Ann-Sofie Rudberg, Fien von Meijenfeldt, Ton Lisman, Nigel Mackman, Per Sandén, Charlotte Thålin

Open access · hybridAbstract read
In one paragraph

Article in Journal of medical virology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 2 pooled it
4.2field-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

51 citing papers in PubMed, 2 syntheses or guidelines pooled it, 72 citations in OpenAlex.

  1. Endotheliopathy in Acute COVID-19 and Long COVID.International journal of molecular sciences · 2023
    Pooled it
  2. Pooled it
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  7. Review
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  9. Article
  10. Observational
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  12. Autoantibodies targeting angiotensin-converting enzyme 2 are prevalent and not induced by SARS-CoV-2 infection.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2025
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  13. Article
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  15. Article
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  18. Review
  19. Current drug discovery technologies · 2024
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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

9 authors at 3 institutions in 4 countries.

Annika LundströmDivision of Neurology, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.ORCID 0000-0003-1671-0827
Louise ZieglerDivision of Internal Medicine, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.
Sebastian HavervallDivision of Internal Medicine, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.
Ann-Sofie RudbergDivision of Neurology, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.
Fien von MeijenfeldtSurgical Research Laboratory, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Ton LismanSurgical Research Laboratory, Department of Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
Nigel MackmanDivision of Hematology, Department of Medicine, UNC Blood Research Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
Per SandénDivision of Neurology, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.
Charlotte ThålinDivision of Internal Medicine, Department of Clinical Sciences, Karolinska Institutet Danderyd Hospital, Stockholm, Sweden.
Danderyds sjukhus · SEUniversity Medical Center Groningen · NLUniversity of North Carolina at Chapel Hill · US

Funding

Jonas & Christina af Jochnick foundationKnut och Alice Wallenbergs Stiftelse
6 · The paper itself

Abstract

The main entry receptor of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is angiotensin-converting enzyme 2 (ACE2). SARS-CoV-2 interactions with ACE2 may increase ectodomain shedding but consequences for the renin-angiotensin system and pathology in Coronavirus disease 2019 (COVID-19) remain unclear. We measured soluble ACE2 (sACE2) and sACE levels by enzyme-linked immunosorbent assay in 114 hospital-treated COVID-19 patients compared with 10 healthy controls; follow-up samples after four months were analyzed for 58 patients. Associations between sACE2 respectively sACE and risk factors for severe COVID-19, outcome, and inflammatory markers were investigated. Levels of sACE2 were higher in COVID-19 patients than in healthy controls, median 5.0 (interquartile range 2.8-11.8) ng/ml versus 1.4 (1.1-1.6) ng/ml, p < .0001. sACE2 was higher in men than women but was not affected by other risk factors for severe COVID-19. sACE2 decreased to 2.3 (1.6-3.9) ng/ml at follow-up, p < .0001, but remained higher than in healthy controls, p = .012. sACE was marginally lower during COVID-19 compared with at follow-up, 57 (45-70) ng/ml versus 72 (52-87) ng/ml, p = .008. Levels of sACE2 and sACE did not differ depending on survival or disease severity. sACE2 during COVID-19 correlated with von Willebrand factor, factor VIII and D-dimer, while sACE correlated with interleukin 6, tumor necrosis factor α, and plasminogen activator inhibitor 1. Conclusions: sACE2 was transiently elevated in COVID-19, likely due to increased shedding from infected cells. sACE2 and sACE during COVID-19 differed in correlations with markers of inflammation and endothelial dysfunction, suggesting release from different cell types and/or vascular beds.

Indexed as

AdultAgedAngiotensin-Converting Enzyme 2BiomarkersCOVID-19FemaleFollow-Up StudiesHumansInflammationMaleMiddle AgedPeptidyl-Dipeptidase ARenin-Angiotensin SystemRisk FactorsSARS-CoV-2ACE2 protein, humanACE protein, humanAngiotensin-Converting Enzyme 2BiomarkersPeptidyl-Dipeptidase Aangiotensin-converting enzyme 2COVID-19inflammationrenin angiotensin systemrisk factor

Identifiers

PMID34138483
PMCPMC8426677
OpenAlexW3171453642

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.