Evidence map›Paper›PMID 15857974›Full record

ArticleJournal of virology2005

High-level expression of Marek's disease virus glycoprotein C is detrimental to virus growth in vitro.

B Karsten Tischer, Daniel Schumacher, Danièlle Chabanne-Vautherot, Vladimir Zelnik, Jean-François Vautherot, Nikolaus Osterrieder

Open access · greenAbstract readComparative Study
In one paragraph

Article in Journal of virology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
1.4field-weighted citation impact, top 18% 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

25 citing papers in PubMed, 40 citations in OpenAlex.

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  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

6 authors at 3 institutions in 2 countries.

B Karsten TischerDepartment of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
Daniel Schumacher
Danièlle Chabanne-Vautherot
Vladimir Zelnik
Jean-François Vautherot
Nikolaus Osterrieder
Cornell University · USLohmann Tierzucht (Germany) · DENew York State College of Veterinary Medicine · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Expression levels of Marek's disease virus (MDV) glycoprotein C (gC) are significantly reduced after serial virus passage in cell culture. Reduced gC expression coincides with enhanced MDV growth in vitro and attenuation. To analyze this phenomenon in detail, a full-length infectious MDV clone was modified by Red-based and shuttle mutagenesis in Escherichia coli. Besides a gC-negative deletion mutant harboring a kanamycin resistance gene, a markerless mutant with the U(L)44 gene deleted was constructed. On the basis of this deletion mutant, the original or a modified U(L)44 gene with a mutated start codon (AUG-->ACG) was reinserted into the authentic locus. Similarly, mutants expressing authentic gC or the start codon mutation under the control of a strong constitutive promoter were generated. In vitro studies demonstrated that gC deletion mutants induced twofold-larger plaques than the parental virus did, whereas constitutive overexpression of the glycoprotein resulted in a more than twofold reduction in plaque size. In addition, plaque sizes of the gC deletion mutant were reduced when virus was grown using supernatants from cells infected with parental virus, but supernatants obtained from cells infected with the gC deletion mutant had no measurable effect on plaque size. The results indicated that (i) expression of MDV gC, albeit at low levels in a highly passaged virus, had a significant negative impact on the cell-to-cell spread capabilities of the virus, which was alleviated in its absence and exacerbated by its overexpression, and that (ii) this activity was mediated by the secreted form of MDV gC.

Indexed as

Amino Acid SequenceAnimalsAntigens, ViralCells, CulturedCulture Media, ConditionedGene Expression Regulation, ViralMardivirusMolecular Sequence DataPoint MutationSequence AlignmentViral Envelope ProteinsVirus ReplicationAntigens, ViralCulture Media, Conditionedglycoprotein C, Marek's disease virusViral Envelope Proteins

Identifiers

PMID15857974
PMCPMC1091721
OpenAlexW2169565544

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.