Evidence map›Paper›PMID 18316385›Full record

ArticleInfection and immunity2008

Murine model for assessment of Plasmodium falciparum transmission-blocking vaccine using transgenic Plasmodium berghei parasites expressing the target antigen Pfs25.

Godfree Mlambo, Jorge Maciel, Nirbhay Kumar

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
3.8field-weighted citation impact, top 7% 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

21 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
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  5. A Hetero-Multimeric Chitinase-ContainingFrontiers in cellular and infection microbiology · 2020
    Article
  6. A Multi-StageFrontiers in cellular and infection microbiology · 2019
    Article
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  12. Review
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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

3 authors at 1 institution in 1 country.

Godfree MlamboMalaria Research Institute, Johns Hopkins Bloomberg School of Public Health, Department of Molecular Microbiology and Immunology, 615 N. Wolfe Street, Baltimore, MD 21205, USA.
Jorge Maciel
Nirbhay Kumar
Johns Hopkins University · US

Funding

ZINC AND CA EDTA THERAPY OF PLUMBISMM01RR000052 · NCRR · JOHNS HOPKINS UNIVERSITY · PI FLEXNER, CHARLES W. · 1985 to 2007
$37.3M
A DNA VACCINE TO PREVENT TRANSMISSION OF HUMAN MALARIAR01AI047089 · NIAID · TULANE UNIVERSITY OF LOUISIANA · PI KUMAR, NIRBHAY · 2000 to 2011
$3.6M
NCRR NIH HHS M01 RR000052NCRR NIH HHS RR00052NIAID NIH HHS R01 AI047089NIAID NIH HHS R01AI047089
6 · The paper itself

Abstract

Currently, there is no animal model for Plasmodium falciparum challenge to evaluate malaria transmission-blocking vaccines based on the well-established Pfs25 target antigen. The biological activity of transmission-blocking antibodies is typically assessed using an assay known as the membrane feeding assay (MFA). It is an in vitro method that involves mixing antibodies with cultured P. falciparum gametocytes and feeding them to mosquitoes through an artificial membrane followed by assessment of infection in the mosquitoes. We genetically modified Plasmodium berghei to express Pfs25 and demonstrated that the transgenic parasites (TrPfs25Pb) are susceptible to anti-Pfs25 antibodies during mosquito-stage development. The asexual growth kinetics and mosquito infectivity of TrPfs25Pb were comparable to those of wild-type parasites, and TrPfs25Pb displayed Pfs25 on the surface of ookinetes. Immune sera from nonhuman primates immunized with a Pfs25-based vaccine when passively transferred to mice blocked transmission of TrPfs25Pb to Anopheles stephensi. Furthermore, mice immunized with Pfs25 DNA vaccine and challenged with TrPfs25Pb displayed reduced malaria transmission compared to mice immunized with wild-type plasmid. These studies describe development of an animal malaria model alternative to the in vitro MFA and show that the model can facilitate P. falciparum transmission-blocking vaccine evaluation based on the target antigen Pfs25. We believe that an animal model to test transmission-blocking vaccines would be superior to the MFA, since there may be additional immune factors that synergize the transmission-blocking activity of antibodies in vivo.

Indexed as

Disease Models, AnimalAnimalsAnimals, Genetically ModifiedAnophelesAntibodies, ProtozoanCell CountFemaleMalaria, FalciparumMalaria VaccinesMicePlasmodium bergheiPlasmodium falciparumProtozoan ProteinsSpores, ProtozoanAntibodies, ProtozoanMalaria VaccinesPfs25 protein, Plasmodium falciparumProtozoan Proteins

Identifiers

PMID18316385
PMCPMC2346707
OpenAlexW2132285505

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.