Evidence map›Paper›PMID 26300182›Full record

ArticleJournal of neuroscience methods2015

The use of a viral 2A sequence for the simultaneous over-expression of both the vgf gene and enhanced green fluorescent protein (eGFP) in vitro and in vivo.

Jo E Lewis, John M Brameld, Phil Hill, Perry Barrett, Francis J P Ebling, Preeti H Jethwa

Abstract read
In one paragraph

Article in Journal of neuroscience methods, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
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

11 citing papers in PubMed.

  1. Article
  2. Article
  3. Evaluation of the SH-SY5Y cell line as anFrontiers in molecular neuroscience · 2023
    Article
  4. Article
  5. Review
  6. Article
  7. Expression of aFrontiers in cellular and infection microbiology · 2020
    Article
  8. Adipocytes: A Novel Target for IL-15/IL-15Rα Cancer Gene Therapy.Molecular therapy : the journal of the American Society of Gene Therapy · 2019
    Article
  9. Article
  10. Article
  11. 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

6 authors.

Jo E LewisDivision of Nutritional Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK; School of Life Sciences, University of Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, UK.
John M BrameldDivision of Nutritional Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
Phil HillDivision of Nutritional Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
Perry BarrettThe Rowett Institute of Nutrition and Health, University of Aberdeen, Bucksburn, Aberdeen AB21 9SB, UK.
Francis J P EblingSchool of Life Sciences, University of Nottingham Medical School, Queen's Medical Centre, Nottingham NG7 2UH, UK.
Preeti H JethwaDivision of Nutritional Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK. Electronic address: preeti.jethwa@nottingham.ac.uk.

Funding

Biotechnology and Biological Sciences Research Council
6 · The paper itself

Abstract

introductionThe viral 2A sequence has become an attractive alternative to the traditional internal ribosomal entry site (IRES) for simultaneous over-expression of two genes and in combination with recombinant adeno-associated viruses (rAAV) has been used to manipulate gene expression in vitro. NEW

methodTo develop a rAAV construct in combination with the viral 2A sequence to allow long-term over-expression of the vgf gene and fluorescent marker gene for tracking of the transfected neurones in vivo.

resultsTransient transfection of the AAV plasmid containing the vgf gene, viral 2A sequence and eGFP into SH-SY5Y cells resulted in eGFP fluorescence comparable to a commercially available reporter construct. This increase in fluorescent cells was accompanied by an increase in VGF mRNA expression. Infusion of the rAAV vector containing the vgf gene, viral 2A sequence and eGFP resulted in eGFP fluorescence in the hypothalamus of both mice and Siberian hamsters, 32 weeks post infusion. In situ hybridisation confirmed that the location of VGF mRNA expression in the hypothalamus corresponded to the eGFP pattern of fluorescence. COMPARISON WITH OLD

methodThe viral 2A sequence is much smaller than the traditional IRES and therefore allowed over-expression of the vgf gene with fluorescent tracking without compromising viral capacity.

conclusionThe use of the viral 2A sequence in the AAV plasmid allowed the simultaneous expression of both genes in vitro. When used in combination with rAAV it resulted in long-term over-expression of both genes at equivalent locations in the hypothalamus of both Siberian hamsters and mice, without any adverse effects.

Indexed as

Genetic TechniquesGenetic VectorsAmino Acid SequenceAnimalsBase SequenceCell Line, TumorConsensus SequenceDependovirusDNA, RecombinantDNA, ViralGreen Fluorescent ProteinsHumansHypothalamusMaleMesocricetusMice, Inbred C57BLDNA, RecombinantDNA, Viralenhanced green fluorescent proteinGreen Fluorescent ProteinsNerve Growth FactorsNeuropeptidesRNA, MessengerVgf protein, mouseEnhanced green fluorescent protein (eGFP)Neuroblastoma SH-SY5Y cellsRecombinant adeno-associated virus (rAAV)Siberian hamsterVGF (non-acronymic)Viral 2A sequence

Identifiers

PMID26300182
PMCPMC4659456

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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.