Evidence map›Paper›PMID 34642303›Full record

ArticleNPJ vaccines2021

Preclinical development of a Pfs230-Pfs48/45 chimeric malaria transmission-blocking vaccine.

Susheel K Singh, Jordan Plieskatt, Bishwanath K Chourasia, Vandana Singh, Karin Lövgren Bengtsson, Jenny M Reimer, Renate C van Daalen, Karina Teelen, Marga van de Vegte-Bolmer, Geert-Jan van Gemert and 2 more

Open access · goldAbstract read
In one paragraph

Article in NPJ vaccines, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
5.1field-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

24 citing papers in PubMed, 31 citations in OpenAlex.

  1. Magnitude and durability of ProC6C-AlOH/Matrix-MHuman vaccines & immunotherapeutics · 2025
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  16. Cloning and Recombinant Protein Expression in Lactococcus lactis.Methods in molecular biology (Clifton, N.J.) · 2023
    Article
  17. Article
  18. Article
  19. Monoclonal antibodies for malaria prevention.Molecular therapy : the journal of the American Society of Gene Therapy · 2022
    Review
  20. Frontiers in cellular and infection microbiology · 2022
    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

12 authors at 4 institutions in 4 countries.

Susheel K SinghDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Jordan PlieskattPATH's Malaria Vaccine Initiative, Washington, WA, USA.
Bishwanath K ChourasiaDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Vandana SinghDepartment for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark.
Karin Lövgren BengtssonNovavax AB, Uppsala, Sweden.
Jenny M ReimerNovavax AB, Uppsala, Sweden.ORCID http://orcid.org/0000-0002-0287-4575
Renate C van DaalenDepartment of Medical Microbiology, Radboud University Medical Center, Nijmegen, Netherlands.
Karina TeelenDepartment of Medical Microbiology, Radboud University Medical Center, Nijmegen, Netherlands.
Marga van de Vegte-BolmerDepartment of Medical Microbiology, Radboud University Medical Center, Nijmegen, Netherlands.
Geert-Jan van GemertDepartment of Medical Microbiology, Radboud University Medical Center, Nijmegen, Netherlands.
Matthijs M Jore *Department of Medical Microbiology, Radboud University Medical Center, Nijmegen, Netherlands. Matthijs.jore@radboudumc.nl.ORCID http://orcid.org/0000-0002-0686-370X
Michael Theisen *Department for Congenital Disorders, Statens Serum Institut, Copenhagen, Denmark. mth@ssi.dk.ORCID http://orcid.org/0000-0003-4412-1392
Radboud University Nijmegen · NLStatens Serum Institut · DKNovavax (Sweden) · SEU.S. President's Malaria Initiative · US

Funding

Bill and Melinda Gates Foundation (Bill & Melinda Gates Foundation) NNF14CC0001EC | Horizon 2020 Framework Programme (EU Framework Programme for Research and Innovation H2020) 733273European and Developing Countries Clinical Trials Partnership (EDCTP) RIA2018SV-2311PATH (Program for Appropriate Technology in Health) OPP1108403
6 · The paper itself

Abstract

The Plasmodium falciparum Pfs230 and Pfs48/45 proteins are leading candidates for a malaria transmission-blocking vaccine (TBV). Previously, we showed that a Pfs230-Pfs48/45 fusion protein elicits higher levels of functional antibodies than the individual antigens, but low yields hampered progression to clinical evaluation. Here we identified a modified construct (ProC6C) with a circumsporozoite protein (CSP) repeat-linker sequence that enhances expression. A scalable and reproducible process in the Lactococcus lactis expression system was developed and ProC6C was successfully transferred for manufacturing under current Good Manufacturing Practices (cGMP). In addition, a panel of analytical assays for release and stability were developed. Intact mass spectrometry analysis and multiangle light scattering showed that the protein contained correct disulfide bonds and was monomeric. Immunogenicity studies in mice showed that the ProC6C adsorbed to Alhydrogel

Identifiers

PMID34642303
PMCPMC8511065
OpenAlexW3207931415

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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.