Evidence map›Paper›PMID 29795572›Full record

ArticlePLoS neglected tropical diseases2018

A modified anthrax toxin-based enzyme-linked immunospot assay reveals robust T cell responses in symptomatic and asymptomatic Ebola virus exposed individuals.

Bobby Brooke Herrera, Donald J Hamel, Philip Oshun, Rolake Akinsola, Alani S Akanmu, Charlotte A Chang, Philomena Eromon, Onikepe Folarin, Kayode T Adeyemi, Christian T Happi and 3 more

Open access · goldAbstract read
In one paragraph

Article in PLoS neglected tropical diseases, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
0.3field-weighted citation impact, top 44% 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

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 14 citations in OpenAlex.

  1. Pooled it
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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

13 authors at 4 institutions in 2 countries.

Bobby Brooke HerreraDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America.
Donald J HamelDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America.
Philip OshunCollege of Medicine, University of Lagos, Akoka, Lagos, Nigeria.
Rolake AkinsolaLagos University Teaching Hospital, Idi Oro, Lagos, Nigeria.
Alani S AkanmuCollege of Medicine, University of Lagos, Akoka, Lagos, Nigeria.ORCID 0000-0001-7424-6060
Charlotte A ChangDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America.
Philomena EromonAfrican Centre of Excellence for Genomics of Infectious Diseases (ACEGID), Redeemer's University, Ede, Osun State, Nigeria.
Onikepe FolarinAfrican Centre of Excellence for Genomics of Infectious Diseases (ACEGID), Redeemer's University, Ede, Osun State, Nigeria.
Kayode T AdeyemiDepartment of Biological Sciences, College of Natural Sciences, Redeemer's University, Ede, Osun State, Nigeria.ORCID 0000-0003-4249-9850
Christian T HappiAfrican Centre of Excellence for Genomics of Infectious Diseases (ACEGID), Redeemer's University, Ede, Osun State, Nigeria.
Yichen LuHaikou VTI Biological Institute, Haikou, Hainan, China.
Folasade OgunsolaCollege of Medicine, University of Lagos, Akoka, Lagos, Nigeria.
Phyllis J KankiDepartment of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, United States of America.ORCID 0000-0003-4739-4572
Harvard University · USRedeemer's University · NGUniversity of Lagos · NGLagos University Teaching Hospital · NG

Funding

Utilize Microbial Metagenomics for Viral Pathogen CharacterizationU54HG007480 · NHGRI · REDEEMER'S UNIVERSITY · PI HAPPI, CHRISTIAN T. · 2017 to 2022
$5.5M
Host and Microbial Genetic Determinants of Febrile Illness in West AfricaU01HG007480 · NHGRI · REDEEMER'S UNIVERSITY · PI HAPPI, CHRISTIAN T. · 2013 to 2016
$1.6M
NHGRI NIH HHS U01 HG007480NHGRI NIH HHS U54 HG007480NIH HHS U01HG007480NIH HHS U54HG007480
6 · The paper itself

Abstract

backgroundEbola virus (EBOV) caused more than 11,000 deaths during the 2013-2016 epidemic in West Africa without approved vaccines or immunotherapeutics. Despite its high lethality in some individuals, EBOV infection can produce little to no symptoms in others. A better understanding of the immune responses in individuals who experienced minimally symptomatic and asymptomatic infection could aid the development of more effective vaccines and antivirals against EBOV and related filoviruses. METHODOLOGY/PRINCIPLE

findingsBetween August and November 2017, blood samples were collected from 19 study participants in Lagos, Nigeria, including 3 Ebola virus disease (EVD) survivors, 10 individuals with documented close contact with symptomatic EVD patients, and 6 control healthcare workers for a cross-sectional serosurvey and T cell analysis. The Lagos samples, as well as archived serum collected from healthy individuals living in surrounding areas of the 1976 Democratic Republic of Congo (DRC) epidemic, were tested for EBOV IgG using commercial enzyme-linked immunosorbent assays (ELISAs) and Western blots. We detected antibodies in 3 out of 3 Lagos survivors and identified 2 seropositive individuals not known to have ever been infected. Of the DRC samples tested, we detected antibodies in 9 out of 71 (12.7%). To characterize the T cell responses in the Lagos samples, we developed an anthrax toxin-based enzyme-linked immunospot (ELISPOT) assay. The seropositive asymptomatic individuals had T cell responses against EBOV nucleoprotein, matrix protein, and glycoprotein 1 that were stronger in magnitude compared to the survivors. CONCLUSION/SIGNIFICANCE: Our data provide further evidence of EBOV exposure in individuals without EVD-like illness and, for the first time, demonstrate that these individuals have T cell responses that are stronger in magnitude compared to severe cases. These findings suggest that T cell immunity may protect against severe EVD, which has important implications for vaccine development.

Indexed as

AdultAgedAntibodies, ViralAntigens, BacterialAsymptomatic DiseasesBacterial ToxinsCongoCross-Sectional StudiesEbolavirusEnzyme-Linked Immunospot AssayFemaleHemorrhagic Fever, EbolaHumansImmunoglobulin GMaleMiddle Agedanthrax toxinAntibodies, ViralAntigens, BacterialBacterial ToxinsImmunoglobulin G

Identifiers

PMID29795572
PMCPMC5991402
OpenAlexW2803444356

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.