Evidence map›Paper›PMID 27148635›Full record

ArticleJournal of clinical virology : the official publication of the Pan American Society for Clinical Virology2016

Validation of a standardized extraction method for formalin-fixed paraffin-embedded tissue samples.

Camilla Lagheden, Carina Eklund, Sara Nordqvist Kleppe, Elizabeth R Unger, Joakim Dillner, Karin Sundström

Open access · greenAbstract readComparative Study
In one paragraph

Article in Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.9field-weighted citation impact, top 14% 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

17 citing papers in PubMed, 30 citations in OpenAlex.

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  6. Human papillomavirus negative high grade cervical lesions and cancers: Suggested guidance for HPV testing quality assurance.Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology · 2024
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  12. A fluorometric hybridization assay for detecting and genotyping high-risk human papillomavirus 16 and 18 in archival tissues of cervical specimens.Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] · 2020
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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 2 institutions in 2 countries.

Camilla LaghedenDepartment of Laboratory Medicine, Karolinska Institutet, F56 Huddinge, 14188 Stockholm, Sweden.
Carina EklundDepartment of Laboratory Medicine, Karolinska Institutet, F56 Huddinge, 14188 Stockholm, Sweden.
Sara Nordqvist KleppeDepartment of Laboratory Medicine, Karolinska Institutet, F56 Huddinge, 14188 Stockholm, Sweden.
Elizabeth R UngerDivision of High-Consequence Pathogens and Pathology, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Joakim DillnerDepartment of Laboratory Medicine, Karolinska Institutet, F56 Huddinge, 14188 Stockholm, Sweden; Medical Epidemiology & Biostatistics, Karolinska Institutet, SE-17177 Stockholm, Sweden. Electronic address: Joakim.Dillner@ki.se.
Karin SundströmDepartment of Laboratory Medicine, Karolinska Institutet, F56 Huddinge, 14188 Stockholm, Sweden.
Karolinska Institutet · SENational Center for Emerging and Zoonotic Infectious Diseases · US

Funding

Intramural CDC HHS CC999999
6 · The paper itself

Abstract

backgroundFormalin-fixed paraffin-embedded (FFPE) samples can be DNA-extracted and used for human papillomavirus (HPV) genotyping. The xylene-based gold standard for extracting FFPE samples is laborious, suboptimal and involves health hazards for the personnel involved.

objectivesTo compare extraction with the standard xylene method to a xylene-free method used in an HPV LabNet Global Reference Laboratory at the Centers for Disease Control (CDC); based on a commercial method with an extra heating step. STUDY

designFifty FFPE samples were randomly selected from a national audit of all cervical cancer cases diagnosed in Sweden during 10 years. For each case-block, a blank-block was sectioned, as a control for contamination. For xylene extraction, the standard WHO Laboratory Manual protocol was used. For the CDC method, the manufacturers' protocol was followed except for an extra heating step, 120°C for 20min. Samples were extracted and tested in parallel with β-globin real-time PCR, HPV16 real-time PCR and HPV typing using modified general primers (MGP)-PCR and Luminex assays.

resultsFor a valid result the blank-block had to be betaglobin-negative in all tests and the case-block positive for beta-globin. Overall, detection was improved with the heating method and the amount of HPV-positive samples increased from 70% to 86% (p=0.039). For all samples where HPV type concordance could be evaluated, there was 100% type concordance.

conclusionsA xylene-free and robust extraction method for HPV-DNA typing in FFPE material is currently in great demand. Our proposed standardized protocol appears to be generally useful.

Indexed as

DNA, ViralFemaleFormaldehydeGenotypeHuman papillomavirus 16HumansMolecular TypingPapillomavirus InfectionsParaffin EmbeddingSensitivity and SpecificityTissue FixationUterine Cervical NeoplasmsXylenesDNA, ViralFormaldehydeXylenesDNA-extractionFormalin-Fixed paraffin-Embedded (FFPE)GenotypingHuman papillomavirus (HPV)Xylene

Identifiers

PMID27148635
PMCPMC5075962
OpenAlexW2342627526

What OpenQuestion holds

Textmetadata
LicenceTDM
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.