Evidence map›Paper›PMID 28774566›Full record

ArticleVaccine2017

Correlation between anthrax lethal toxin neutralizing antibody levels and survival in guinea pigs and nonhuman primates vaccinated with the AV7909 anthrax vaccine candidate.

Vladimir Savransky, Jeffry D Shearer, Melicia R Gainey, Daniel C Sanford, Gloria S Sivko, Gregory V Stark, Na Li, Boris Ionin, Michael J Lacy, Mario H Skiadopoulos

Open access · hybridAbstract read
In one paragraph

Article in Vaccine, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

14 citing papers in PubMed, 26 citations in OpenAlex.

  1. Review
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  9. Polysaccharide PCP-I isolated fromHuman vaccines & immunotherapeutics · 2020
    Article
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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

10 authors at 2 institutions in 1 country.

Vladimir SavranskyEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
Jeffry D ShearerEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
Melicia R GaineyBattelle, Columbus, OH 43201, USA.
Daniel C SanfordBattelle, Columbus, OH 43201, USA.
Gloria S SivkoBattelle, Columbus, OH 43201, USA.
Gregory V StarkBattelle, Columbus, OH 43201, USA.
Na LiEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
Boris IoninEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
Michael J LacyEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA.
Mario H SkiadopoulosEmergent BioSolutions Inc., 300 Professional Drive, Gaithersburg, MD 20879, USA. Electronic address: SkiadopoulosM@ebsi.com.
Emergent BioSolutions (United States) · USBattelle · US

Funding

NIAID NIH HHS HHSN272200800051CNIAID NIH HHS HHSN272201000035C
6 · The paper itself

Abstract

The anthrax vaccine candidate AV7909 is being developed as a next generation vaccine for a post-exposure prophylaxis (PEP) indication against anthrax. AV7909 consists of the Anthrax Vaccine Adsorbed (AVA, BioThrax®) bulk drug substance adjuvanted with the immunostimulatory oligodeoxynucleotide (ODN) compound, CPG 7909. The addition of CPG 7909 to AVA enhances both the magnitude and the kinetics of antibody responses in animals and human subjects, making AV7909 a suitable next-generation vaccine for use in a PEP setting. The studies described here provide initial information on AV7909-induced toxin-neutralizing antibody (TNA) levels associated with the protection of animals from lethal Bacillus anthracis challenge. Guinea pigs or nonhuman primates (NHPs) were immunized on Days 0 and 28 with various dilutions of AV7909, AVA or a saline or Alhydrogel+CPG 7909 control. Animals were challenged via the inhalational route with a lethal dose of aerosolized B. anthracis (Ames strain) spores and observed for clinical signs of disease and mortality. The relationship between pre-challenge serum TNA levels and survival following challenge was determined in order to calculate a threshold TNA level associated with protection. Immunisation with AV7909 induced a rapid, highly protective TNA response in guinea pigs and NHPs. Surprisingly, the TNA threshold associated with a 70% probability of survival for AV7909 immunized animals was substantially lower than the threshold which has been established for the licensed AVA vaccine. The results of this study suggest that the TNA threshold of protection against anthrax could be modified by the addition of an immune stimulant such as CPG 7909 and that the TNA levels associated with protection may be vaccine-specific.

Indexed as

AnimalsAnthrax VaccinesAntibodies, NeutralizingGuinea PigsPost-Exposure ProphylaxisPrimatesVaccinationAnthrax VaccinesAntibodies, NeutralizingBiothraxAnimal ruleAnthrax vaccineCorrelate of protectionCPG 7909 adjuvantCynomolgus macaqueGuinea pigTNA threshold

Identifiers

PMID28774566
PMCPMC5580334
OpenAlexW2741196003

What OpenQuestion holds

Textmetadata
LicenceTDM
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.