Evidence map›Paper›PMID 11972351›Full record

ArticleNucleic acids research2002

Relative expression software tool (REST) for group-wise comparison and statistical analysis of relative expression results in real-time PCR.

Michael W Pfaffl, Graham W Horgan, Leo Dempfle

Abstract 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 3,000 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3,000citing papers in PubMed, 1 pooled it
–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

3,000 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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2,940 more citing papers are in PubMed but not listed here.

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.

Michael W PfafflInstitute of Physiology, FML-Weihenstephan, Center of Life and Food Sciences, Technical University of Munich, Germany. pfaffl@wzw.tum.de
Graham W Horgan
Leo Dempfle

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Real-time reverse transcription followed by polymerase chain reaction (RT-PCR) is the most suitable method for the detection and quantification of mRNA. It offers high sensitivity, good reproducibility and a wide quantification range. Today, relative expression is increasingly used, where the expression of a target gene is standardised by a non-regulated reference gene. Several mathematical algorithms have been developed to compute an expression ratio, based on real-time PCR efficiency and the crossing point deviation of an unknown sample versus a control. But all published equations and available models for the calculation of relative expression ratio allow only for the determination of a single transcription difference between one control and one sample. Therefore a new software tool was established, named REST (relative expression software tool), which compares two groups, with up to 16 data points in a sample and 16 in a control group, for reference and up to four target genes. The mathematical model used is based on the PCR efficiencies and the mean crossing point deviation between the sample and control group. Subsequently, the expression ratio results of the four investigated transcripts are tested for significance by a randomisation test. Herein, development and application of REST is explained and the usefulness of relative expression in real-time PCR using REST is discussed. The latest software version of REST and examples for the correct use can be downloaded at http://www.wzw.tum.de/gene-quantification/.

Indexed as

Models, StatisticalReverse Transcriptase Polymerase Chain ReactionSoftwareAnimalsInternetRatsReference StandardsReproducibility of ResultsRNA, MessengerRNA ProbesSensitivity and SpecificityTime FactorsTranscription, GeneticRNA, MessengerRNA Probes

Identifiers

PMID11972351
PMCPMC113859

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.