Evidence map›Paper›PMID 27575051›Full record

ArticlePloS one2016

Evaluation of Existing Methods for Human Blood mRNA Isolation and Analysis for Large Studies.

Anke Meyer, Federico Paroni, Kathrin Günther, Gitanjali Dharmadhikari, Wolfgang Ahrens, Sørge Kelm, Kathrin Maedler

Open access · goldAbstract readComparative Study
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
1.0field-weighted citation impact, top 21% 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

13 citing papers in PubMed, 22 citations in OpenAlex.

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  12. Clinical utility of circulating non-coding RNAs - an update.Nature reviews. Clinical oncology · 2018
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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

7 authors at 3 institutions in 1 country.

Anke MeyerCentre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.
Federico ParoniCentre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.
Kathrin GüntherLeibniz-Institute for Prevention Research and Epidemiology-BIPS, Bremen, Germany.
Gitanjali DharmadhikariCentre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.
Wolfgang AhrensLeibniz-Institute for Prevention Research and Epidemiology-BIPS, Bremen, Germany.
Sørge KelmCentre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.
Kathrin MaedlerCentre for Biomolecular Interactions Bremen, University of Bremen, Bremen, Germany.
University of Bremen · DELeibniz Institute for Prevention Research and Epidemiology - BIPS · DEHeinrich Heine University Düsseldorf · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsPrior to implementing gene expression analyses from blood to a larger cohort study, an evaluation to set up a reliable and reproducible method is mandatory but challenging due to the specific characteristics of the samples as well as their collection methods. In this pilot study we optimized a combination of blood sampling and RNA isolation methods and present reproducible gene expression results from human blood samples.

methodsThe established PAXgeneTM blood collection method (Qiagen) was compared with the more recent TempusTM collection and storing system. RNA from blood samples collected by both systems was extracted on columns with the corresponding Norgen and PAX RNA extraction Kits. RNA quantity and quality was compared photometrically, with Ribogreen and by Real-Time PCR analyses of various reference genes (PPIA, β-ACTIN and TUBULIN) and exemplary of SIGLEC-7.

resultsCombining different sampling methods and extraction kits caused strong variations in gene expression. The use of PAXgeneTM and TempusTM collection systems resulted in RNA of good quality and quantity for the respective RNA isolation system. No large inter-donor variations could be detected for both systems. However, it was not possible to extract sufficient RNA of good quality with the PAXgeneTM RNA extraction system from samples collected by TempusTM collection tubes. Comparing only the Norgen RNA extraction methods, RNA from blood collected either by the TempusTM or PAXgeneTM collection system delivered sufficient amount and quality of RNA, but the TempusTM collection delivered higher RNA concentration compared to the PAXTM collection system. The established Pre-analytix PAXgeneTM RNA extraction system together with the PAXgeneTM blood collection system showed lowest CT-values, i.e. highest RNA concentration of good quality. Expression levels of all tested genes were stable and reproducible.

conclusionsThis study confirms that it is not possible to mix or change sampling or extraction strategies during the same study because of large variations of RNA yield and expression levels.

Indexed as

Blood Specimen CollectionGene Expression ProfilingHumansPaired Box Transcription FactorsPilot ProjectsReagent Kits, DiagnosticReal-Time Polymerase Chain ReactionRNA, MessengerPaired Box Transcription FactorsReagent Kits, DiagnosticRNA, Messenger

Identifiers

PMID27575051
PMCPMC5004844
OpenAlexW2512625763

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.