Evidence map›Paper›PMID 34755902›Full record

ReviewScandinavian journal of immunology2021

Perforin, COVID-19 and a possible pathogenic auto-inflammatory feedback loop.

Louise Cunningham, Ian Kimber, David Basketter, Peter Simmonds, Sheila McSweeney, Christos Tziotzios, John P McFadden

Open access · bronzeAbstract readReview
In one paragraph

Review in Scandinavian journal of immunology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.4field-weighted citation impact, top 19% 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

15 citing papers in PubMed, 26 citations in OpenAlex.

  1. Article
  2. Article
  3. Review
  4. Late-onset Systemic Lupus Erythematosus.Rheumatology international · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Epidemiology and Clinical Presentation of COVID-19 in Older Adults.Infectious disease clinics of North America · 2023
    Review
  11. Review
  12. Article
  13. Immunosenescence and COVID-19.Mechanisms of ageing and development · 2022
    Review
  14. Article
  15. Review
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

7 authors at 4 institutions in 1 country.

Louise CunninghamSt. John's Institute of Dermatology, Guy's and St Thomas' Hospital, London, UK.ORCID https://orcid.org/0000-0002-2009-3588
Ian KimberFaculty of Biology, Medicine and Health, University of Manchester, Manchester, UK.
David BasketterDABMEB Consultancy Ltd, Wotton-under-Edge, UK.
Peter SimmondsNuffield Department of Medicine, University of Oxford, Oxford, UK.
Sheila McSweeneySt. John's Institute of Dermatology, Guy's and St Thomas' Hospital, London, UK.
Christos TziotziosSt. John's Institute of Dermatology, Guy's and St Thomas' Hospital, London, UK.
John P McFaddenSt. John's Institute of Dermatology, Guy's and St Thomas' Hospital, London, UK.
St Thomas' Hospital · GBManchester Academic Health Science Centre · GBRenishaw (United Kingdom) · GBUniversity of Oxford · GB

Funding

Medical Research Council MR/V006746/1
6 · The paper itself

Abstract

During COVID-19 infection, reduced function of natural killer (NK) cells can lead to both compromised viral clearance and dysregulation of the immune response. Such dysregulation leads to overproduction of cytokines, a raised neutrophil/lymphocyte ratio and monocytosis. This in turn increases IL-6 expression, which promotes scar and thrombus formation. Excess IL-6 also leads to a further reduction in NK function through downregulation of perforin expression, therefore forming a pathogenic auto-inflammatory feedback loop. The perforin/granzyme system of cytotoxicity is the main mechanism through which NK cells and cytotoxic T lymphocytes eliminate virally infected host cells, as well as being central to their role in regulating immune responses to microbial infection. Here, we present epidemiological evidence suggesting an association between perforin expression and resistance to COVID-19. In addition, we outline the manner in which a pathogenic auto-inflammatory feedback loop could operate and the relationship of this loop to genes associated with severe COVID-19. Such an auto-inflammatory loop may be amenable to synergistic multimodal therapy.

Indexed as

AnimalsAutoimmunityCOVID-19Cytokine Release SyndromeDisease ResistanceHumansInterleukin-6Killer Cells, NaturalLymphohistiocytosis, HemophagocyticNeutrophilsPerforinSARS-CoV-2Interleukin-6Perforinauto‐inflammatoryCOVIDcytokine stormhaemophagocytic lymphohistiocytosisinterleukin‐6natural killer cellperforin

Identifiers

PMID34755902
PMCPMC8646999
OpenAlexW3200209830

What OpenQuestion holds

Textmetadata
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.