Evidence map›Paper›PMID 28859641›Full record

ArticleBMC medical genomics2017

A streamlined method for analysing genome-wide DNA methylation patterns from low amounts of FFPE DNA.

Jackie L Ludgate, James Wright, Peter A Stockwell, Ian M Morison, Michael R Eccles, Aniruddha Chatterjee

Open access · goldAbstract read
In one paragraph

Article in BMC medical genomics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.1field-weighted citation impact, top 22% 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

16 citing papers in PubMed, 28 citations in OpenAlex.

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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

6 authors at 3 institutions in 2 countries.

Jackie L LudgateDepartment of Pathology, Dunedin School of Medicine, University of Otago, 270 Great King Street, P.O. Box 56, Dunedin, 9054, New Zealand.
James WrightDepartment of Pathology, Dunedin School of Medicine, University of Otago, 270 Great King Street, P.O. Box 56, Dunedin, 9054, New Zealand.
Peter A StockwellDepartment of Biochemistry, University of Otago, 710 Cumberland Street, Dunedin, 9054, New Zealand.
Ian M MorisonDepartment of Pathology, Dunedin School of Medicine, University of Otago, 270 Great King Street, P.O. Box 56, Dunedin, 9054, New Zealand.
Michael R EcclesDepartment of Pathology, Dunedin School of Medicine, University of Otago, 270 Great King Street, P.O. Box 56, Dunedin, 9054, New Zealand.
Aniruddha ChatterjeeDepartment of Pathology, Dunedin School of Medicine, University of Otago, 270 Great King Street, P.O. Box 56, Dunedin, 9054, New Zealand. aniruddha.chatterjee@otago.ac.nz.
University of Otago · NZCardiff University · GBMaurice Wilkins Centre · NZ

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundFormalin fixed paraffin embedded (FFPE) tumor samples are a major source of DNA from patients in cancer research. However, FFPE is a challenging material to work with due to macromolecular fragmentation and nucleic acid crosslinking. FFPE tissue particularly possesses challenges for methylation analysis and for preparing sequencing-based libraries relying on bisulfite conversion. Successful bisulfite conversion is a key requirement for sequencing-based methylation analysis.

methodsHere we describe a complete and streamlined workflow for preparing next generation sequencing libraries for methylation analysis from FFPE tissues. This includes, counting cells from FFPE blocks and extracting DNA from FFPE slides, testing bisulfite conversion efficiency with a polymerase chain reaction (PCR) based test, preparing reduced representation bisulfite sequencing libraries and massively parallel sequencing.

resultsThe main features and advantages of this protocol are: An optimized method for extracting good quality DNA from FFPE tissues. An efficient bisulfite conversion and next generation sequencing library preparation protocol that uses 50 ng DNA from FFPE tissue. Incorporation of a PCR-based test to assess bisulfite conversion efficiency prior to sequencing.

conclusionsWe provide a complete workflow and an integrated protocol for performing DNA methylation analysis at the genome-scale and we believe this will facilitate clinical epigenetic research that involves the use of FFPE tissue.

Indexed as

DNA MethylationFormaldehydeParaffin EmbeddingTissue FixationDNAGenomicsHigh-Throughput Nucleotide SequencingSequence Analysis, DNADNAFormaldehydeBisulfite sequencingDNA extractionDNA methylationFFPE tissueGenome-wideRRBS

Identifiers

PMID28859641
PMCPMC5580311
OpenAlexW2751868909

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.