Evidence map›Paper›PMID 32821033›Full record

ArticleThe Journal of general virology2020

SARS-CoV-2 growth, furin-cleavage-site adaptation and neutralization using serum from acutely infected hospitalized COVID-19 patients.

William B Klimstra, Natasha L Tilston-Lunel, Sham Nambulli, James Boslett, Cynthia M McMillen, Theron Gilliland, Matthew D Dunn, Chengun Sun, Sarah E Wheeler, Alan Wells and 5 more

Open access · hybridAbstract read
In one paragraph

Article in The Journal of general virology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 99 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
99citing papers in PubMed, 2 pooled it
3.7field-weighted citation impact, top 4% 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

99 citing papers in PubMed, 2 syntheses or guidelines pooled it, 155 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Review
  6. EfficientAntimicrobial agents and chemotherapy · 2025
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Targeting spike glycans to inhibit SARS-CoV2 viral entry.Proceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  16. A non-transmissible live attenuated SARS-CoV-2 vaccine.Molecular therapy : the journal of the American Society of Gene Therapy · 2023
    Article
  17. Article
  18. Article
  19. Article
  20. Article

39 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 1 institution in 1 country.

William B KlimstraCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Natasha L Tilston-LunelCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Sham NambulliCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
James BoslettDepartment of Cell Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
Cynthia M McMillenCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Theron GillilandCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Matthew D DunnCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Chengun SunCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Sarah E WheelerDepartment of Pathology, University of Pittsburgh School of Public Health, Pittsburgh, Pennsylvania, USA.
Alan WellsDepartment of Pathology, University of Pittsburgh School of Public Health, Pittsburgh, Pennsylvania, USA.
Amy L HartmanCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Anita K McElroyCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Douglas S ReedCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
Linda J RennickCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
W Paul DuprexCenter for Vaccine Research, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
University of Pittsburgh · US

Funding

University of Pittsburgh Clinical and Translational Science InstituteUL1TR001857 · NCATS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI REIS, STEVEN E · 2016 to 2025
$129.3M
Immunology of Infectious DiseaseT32AI060525 · NIAID · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI JoAnne L. Flynn · 2005 to 2026
$5.3M
NCATS NIH HHS UL1 TR001857NIAID NIH HHS T32 AI060525
6 · The paper itself

Abstract

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), emerged at the end of 2019 and by mid-June 2020 the virus had spread to at least 215 countries, caused more than 8 000 000 confirmed infections and over 450 000 deaths, and overwhelmed healthcare systems worldwide. Like severe acute respiratory syndrome coronavirus (SARS-CoV), which emerged in 2002 and caused a similar disease, SARS-CoV-2 is a betacoronavirus. Both viruses use human angiotensin-converting enzyme 2 (hACE2) as a receptor to enter cells. However, the SARS-CoV-2 spike (S) glycoprotein has a novel insertion that generates a putative furin cleavage signal and this has been postulated to expand the host range. Two low-passage (P) strains of SARS-CoV-2 (Wash1 : P4 and Munich : P1) were cultured twice in Vero E6 cells and characterized virologically. Sanger and MinION sequencing demonstrated significant deletions in the furin cleavage signal of Wash1 : P6 and minor variants in the Munich : P3 strain. Cleavage of the S glycoprotein in SARS-CoV-2-infected Vero E6 cell lysates was inefficient even when an intact furin cleavage signal was present. Indirect immunofluorescence demonstrated that the S glycoprotein reached the cell surface. Since the S protein is a major antigenic target for the development of neutralizing antibodies, we investigated the development of neutralizing antibody titres in serial serum samples obtained from COVID-19 human patients. These were comparable regardless of the presence of an intact or deleted furin cleavage signal. These studies illustrate the need to characterize virus stocks meticulously prior to performing either

Indexed as

Host-Pathogen InteractionsVirus ReplicationAdaptation, PhysiologicalAnimalsAntibodies, NeutralizingChlorocebus aethiopsCOVID-19FurinGenetic VariationHospitalizationHumansImmunoglobulin AImmunoglobulin GNeutralization TestsProteolysisRNA, ViralAntibodies, NeutralizingFurinImmunoglobulin AImmunoglobulin GRNA, Viraladaptationclinical isolatesCOVID-19furin cleavageneutralizationSARS-CoV-2

Identifiers

PMID32821033
PMCPMC7879561
OpenAlexW3081204841

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.