Evidence map›Paper›PMID 19208231›Full record

ArticleGenetic vaccines and therapy2009

A new plasmid vector for DNA delivery using lactococci.

Valeria Guimarães, Sylvia Innocentin, Jean-Marc Chatel, François Lefèvre, Philippe Langella, Vasco Azevedo, Anderson Miyoshi

Open access · hybridAbstract read
In one paragraph

Article in Genetic vaccines and therapy, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
3.2field-weighted citation impact, top 9% 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

23 citing papers in PubMed, 54 citations in OpenAlex.

  1. Frontiers in microbiology · 2023
    Article
  2. Article
  3. Review
  4. Frontiers in microbiology · 2021
    Article
  5. Engineering the gut microbiota to treat chronic diseases.Applied microbiology and biotechnology · 2020
    Review
  6. Review
  7. Article
  8. Article
  9. Live Bacterial Vectors-A Promising DNA Vaccine Delivery System.Medical sciences (Basel, Switzerland) · 2018
    Review
  10. Review
  11. Review
  12. Article
  13. Recombinant InvasiveFrontiers in microbiology · 2017
    Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
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

7 authors at 3 institutions in 3 countries.

Valeria GuimarãesInstituto de Ciências Biológicas, Universidade Federal de Minas Gerais (ICB-UFMG), Belo Horizonte - MG, Brasil. valeria.guimaraes@cea.fr
Sylvia Innocentin
Jean-Marc Chatel
François Lefèvre
Philippe Langella
Vasco Azevedo
Anderson Miyoshi
Universidade Federal de Minas Gerais · BRInstitut National de la Recherche Agronomique · MAVirologie et Immunologie Moléculaires · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe use of food-grade lactococci as bacterial carriers to DNA delivery into epithelial cells is a new strategy to develop live oral DNA vaccine. Our goal was to develop a new plasmid, named pValac, for antigen delivery for use in lactococci. The pValac plasmid was constructed by the fusion of: i) a eukaryotic region, allowing the cloning of an antigen of interest under the control of the pCMV eukaryotic promoter to be expressed by a host cell and ii) a prokaryotic region allowing replication and selection of bacteria. In order to evaluate pValac functionality, the gfp ORF was cloned into pValac (pValac:gfp) and was analysed by transfection in PK15 cells. The applicability of pValac was demonstrated by invasiveness assays of Lactococcus lactis inlA+ strains harbouring pValac:gfp into Caco-2 cells.

resultsAfter transfection with pValac:gfp, we observed GFP expression in PK15 cells. L. lactis inlA+ were able to invade Caco-2 cells and delivered a functional expression cassette (pCMV:gfp) into epithelial cells.

conclusionWe showed the potential of an invasive L. lactis harbouring pValac to DNA delivery and subsequent triggering DNA expression by epithelial cells. Further work will be to examine whether these strains are able to deliver DNA in intestinal cells in vivo.

Identifiers

PMID19208231
PMCPMC2646724
OpenAlexW2015484392

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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.