Evidence map›Paper›PMID 32621147›Full record

ArticleInternational journal of legal medicine2021

Impact of metal ions on PCR inhibition and RT-PCR efficiency.

Agnieszka Kuffel, Alexander Gray, Niamh Nic Daeid

Open access · hybridAbstract read
In one paragraph

Article in International journal of legal medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

26 citing papers in PubMed, 75 citations in OpenAlex.

  1. Review
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  6. Case of Japanese Marten (Animals : an open access journal from MDPI · 2025
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  10. Fluorescence-activated droplet sequencing (FAD-seq) directly provides sequences of screening hits in antibody discovery.Proceedings of the National Academy of Sciences of the United States of America · 2024
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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

3 authors at 1 institution in 1 country.

Agnieszka KuffelLeverhulme Research Centre for Forensic Science, University of Dundee, Dundee, Scotland.ORCID https://orcid.org/0000-0002-1502-9805
Alexander GrayLeverhulme Research Centre for Forensic Science, University of Dundee, Dundee, Scotland. azgray@dundee.ac.uk.ORCID https://orcid.org/0000-0001-9227-0363
Niamh Nic DaeidLeverhulme Research Centre for Forensic Science, University of Dundee, Dundee, Scotland.ORCID https://orcid.org/0000-0002-9338-0887
University of Dundee · GB

Funding

Leverhulme Trust RC-1015-01
6 · The paper itself

Abstract

Inhibition of PCR by metal ions can pose a serious challenge in the process of forensic DNA analysis. Samples contaminated with various types of metal ions encountered at crime scenes include swabs from metal surfaces such as bullets, cartridge casings, weapons (including guns and knives), metal wires and surfaces as well as bone samples which contain calcium. The mechanism behind the impact of metal ions on DNA recovery, extraction and subsequent amplification is not fully understood. In this study, we assessed the inhibitory effects of commonly encountered metals on DNA amplification. Of the nine tested metals, zinc, tin, iron(II) and copper were shown to have the strongest inhibitory properties having IC50 values significantly below 1 mM. In the second part of the study, three commercially available DNA polymerases were tested for their susceptibility to metal inhibition. We found that KOD polymerase was the most resistant to metal inhibition when compared with Q5 and Taq polymerase. We also demonstrate how the calcium chelator ethylene glycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid (EGTA) can be used as an easy and non-destructive method of reversing calcium-induced inhibition of PCR reactions.

Indexed as

DNA FingerprintingPolymerase Chain ReactionDNA-Directed DNA PolymeraseHumansIonsMetalsDNA-Directed DNA PolymeraseIonsMetalsDNA polymeraseEGTAMetal ionsPCR inhibition

Identifiers

PMID32621147
PMCPMC7782418
OpenAlexW3040302600

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.