Evidence map›Paper›PMID 12384603›Full record

ArticleNucleic acids research2002

Analyses of single-copy Arabidopsis T-DNA-transformed lines show that the presence of vector backbone sequences, short inverted repeats and DNA methylation is not sufficient or necessary for the induction of transgene silencing.

Trine J Meza, Biljana Stangeland, Inderjit S Mercy, Magne Skårn, Dag A Nymoen, Anita Berg, Melinka A Butenko, Anne-Mari Håkelien, Camilla Haslekås, Leonardo A Meza-Zepeda and 1 more

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Nucleic acids research, 2002. 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
1.8field-weighted citation impact, top 15% 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, 76 citations in OpenAlex.

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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

11 authors at 1 institution in 1 country.

Trine J MezaDivision of Molecular Biology, Department of Biology, University of Oslo, PO Box 1031 Blindern, N-0315 Oslo, Norway. t.j.meza@bio.uio.no
Biljana Stangeland
Inderjit S Mercy
Magne Skårn
Dag A Nymoen
Anita Berg
Melinka A Butenko
Anne-Mari Håkelien
Camilla Haslekås
Leonardo A Meza-Zepeda
Reidunn B Aalen
University of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In genetically transformed plants, transgene silencing has been correlated with multiple and complex insertions of foreign DNA, e.g. T-DNA and vector backbone sequences. Occasionally, single-copy transgenes also suffer transgene silencing. We have compared integration patterns and T-DNA/plant DNA junctions in a collection of 37 single-copy T-DNA-transformed Arabidopsis lines, of which 13 displayed silencing. Vector sequences were found integrated in five lines, but only one of these displayed silencing. Truncated T-DNA copies, positioned in inverse orientation to an intact T-DNA copy, were discovered in three lines. The whole nptII gene with pnos promoter was present in the truncated copy of one such line in which heavy silencing has been observed. In the two other lines no silencing has been observed over five generations. Thus, vector sequences and short additional T-DNA sequences are not sufficient or necessary to induce transgene silencing. DNA methylation of selected restriction endonuclease sites could not be correlated with silencing. Our collection of T-DNA/plant DNA junctions has also been used to evaluate current models of T-DNA integration. Data for some of our lines are compatible with T-DNA integration in double-strand breaks, while for others initial invasion of plant DNA by the left or by the right T-DNA end seem important.

Indexed as

Gene Expression Regulation, PlantGene SilencingTransformation, GeneticArabidopsisBase SequenceCell Line, TransformedDNA, BacterialDNA MethylationDNA, PlantGene DosageGenetic VectorsPlants, Genetically ModifiedPromoter Regions, GeneticRepetitive Sequences, Nucleic AcidSequence DeletionTransgenesDNA, BacterialDNA, PlantT-DNA

Identifiers

PMID12384603
PMCPMC137132
OpenAlexW2126575258

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.