Evidence map›Paper›PMID 32636420›Full record

ArticleScientific reports2020

Overcoming challenges in human saliva gene expression measurements.

Patrick Ostheim, Ales Tichý, Igor Sirak, Marie Davidkova, Marketa Markova Stastna, Gabriela Kultova, Tatjana Paunesku, Gayle Woloschak, Matthaeus Majewski, Matthias Port and 1 more

Abstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing 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

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

  1. Potential of Salivary Biomarkers in Autism Research: A Systematic Review.International journal of molecular sciences · 2021
    Pooled it
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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.

Patrick OstheimBundeswehr Institute of Radiobiology affiliated to the University of Ulm, Neuherbergstr. 11, 80937, Munich, Germany. patrickostheim@bundeswehr.org.
Ales TichýDepartment of Radiobiology, Faculty of Military Health Sciences in Hradec Kralove, University of Defence in Brno, Brno, Czech Republic.
Igor SirakDepartment of Oncology and Radiotherapy, University Hospital and Faculty of Medicine, Hradec Kralove, Czech Republic.
Marie DavidkovaDepartment of Radiation Dosimetry, Nuclear Physics Institute of the Czech Academy of Sciences, Prague, Czech Republic.
Marketa Markova StastnaInstitute for Hematology and Blood Transfusion, Hospital Na Bulovce, Prague, Czech Republic.
Gabriela KultovaDepartment of Radiobiology, Faculty of Military Health Sciences in Hradec Kralove, University of Defence in Brno, Brno, Czech Republic.
Tatjana PauneskuDepartment of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA.
Gayle WoloschakDepartment of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA.
Matthaeus MajewskiBundeswehr Institute of Radiobiology affiliated to the University of Ulm, Neuherbergstr. 11, 80937, Munich, Germany.
Matthias PortBundeswehr Institute of Radiobiology affiliated to the University of Ulm, Neuherbergstr. 11, 80937, Munich, Germany.
Michael AbendBundeswehr Institute of Radiobiology affiliated to the University of Ulm, Neuherbergstr. 11, 80937, Munich, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Saliva, as a non-invasive and easily accessible biofluid, has been shown to contain RNA biomarkers for prediction and diagnosis of several diseases. However, systematic analysis done by our group identified two problematic issues not coherently described before: (1) most of the isolated RNA originates from the oral microbiome and (2) the amount of isolated human RNA is comparatively low. The degree of bacterial contamination showed ratios up to 1:900,000, so that only about one out of 900,000 RNA copies was of human origin, but the RNA quality (average RIN 6.7 + /- 0.8) allowed for qRT-PCR. Using 12 saliva samples from healthy donors, we modified the methodology to (1) select only human RNA during cDNA synthesis by aiming at the poly(A)+-tail and (2) introduced a pre-amplification of human RNA before qRT-PCR. Further, the manufacturer's criteria for successful pre-amplification (Ct values ≤ 35 for unamplified cDNA) had to be replaced by (3) proofing linear pre-amplification for each gene, thus, increasing the number of evaluable samples up to 70.6%. When considering theses three modifications unbiased gene expression analysis on human salivary RNA can be performed.

Indexed as

Gene ExpressionAdultDNA, ComplementaryFemaleGene Expression ProfilingHumansMaleReal-Time Polymerase Chain ReactionRNARNA, BacterialRNA, Ribosomal, 18SSalivaTranscriptomeDNA, ComplementaryRNARNA, BacterialRNA, Ribosomal, 18S

Identifiers

PMID32636420
PMCPMC7341869

What OpenQuestion holds

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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.