Evidence map›Paper›PMID 24664487›Full record

ArticleThe oncologist2014

Profiling cancer gene mutations in clinical formalin-fixed, paraffin-embedded colorectal tumor specimens using targeted next-generation sequencing.

Liangxuan Zhang, Liangjing Chen, Sachin Sah, Gary J Latham, Rajesh Patel, Qinghua Song, Hartmut Koeppen, Rachel Tam, Erica Schleifman, Haider Mashhedi and 9 more

Open access · bronzeAbstract read
In one paragraph

Article in The oncologist, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.4field-weighted citation impact, top 7% 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

27 citing papers in PubMed, 49 citations in OpenAlex.

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  17. Molecular predictive markers in tumors of the gastrointestinal tract.World journal of gastrointestinal oncology · 2016
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

19 authors at 2 institutions in 1 country.

Liangxuan ZhangDepartments of Oncology Biomarker Development, Biostatistics, and Pathology, Genentech Inc., South San Francisco, California, USA; Technology Development, Asuragen Inc., Austin, Texas, USA.
Liangjing Chen
Sachin Sah
Gary J Latham
Rajesh Patel
Qinghua Song
Hartmut Koeppen
Rachel Tam
Erica Schleifman
Haider Mashhedi
Sreedevi Chalasani
Ling Fu
Teiko Sumiyoshi
Rajiv Raja
William Forrest
Garret M Hampton
Mark R Lackner
Priti Hegde
Shidong Jia
Asuragen (United States) · USBiostatistical Consulting (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe success of precision oncology relies on accurate and sensitive molecular profiling. The Ion AmpliSeq Cancer Panel, a targeted enrichment method for next-generation sequencing (NGS) using the Ion Torrent platform, provides a fast, easy, and cost-effective sequencing workflow for detecting genomic "hotspot" regions that are frequently mutated in human cancer genes. Most recently, the U.K. has launched the AmpliSeq sequencing test in its National Health Service. This study aimed to evaluate the clinical application of the AmpliSeq methodology.

methodsWe used 10 ng of genomic DNA from formalin-fixed, paraffin-embedded human colorectal cancer (CRC) tumor specimens to sequence 46 cancer genes using the AmpliSeq platform. In a validation study, we developed an orthogonal NGS-based resequencing approach (SimpliSeq) to assess the AmpliSeq variant calls.

resultsValidated mutational analyses revealed that AmpliSeq was effective in profiling gene mutations, and that the method correctly pinpointed "true-positive" gene mutations with variant frequency >5% and demonstrated high-level molecular heterogeneity in CRC. However, AmpliSeq enrichment and NGS also produced several recurrent "false-positive" calls in clinically druggable oncogenes such as PIK3CA.

conclusionAmpliSeq provided highly sensitive and quantitative mutation detection for most of the genes on its cancer panel using limited DNA quantities from formalin-fixed, paraffin-embedded samples. For those genes with recurrent "false-positive" variant calls, caution should be used in data interpretation, and orthogonal verification of mutations is recommended for clinical decision making.

Indexed as

Base SequenceCell Line, TumorClass I Phosphatidylinositol 3-KinasesColorectal NeoplasmsDNA Mutational AnalysisDNA, NeoplasmFormaldehydeGenes, NeoplasmGenetic VariationHigh-Throughput Nucleotide SequencingHumansMutationParaffinPhosphatidylinositol 3-KinasesSequence Analysis, DNATissue EmbeddingClass I Phosphatidylinositol 3-KinasesDNA, NeoplasmFormaldehydeParaffinPhosphatidylinositol 3-KinasesPIK3CA protein, humanAmpliSeqIon TorrentMolecular diagnosticsMutationNext-generation sequencingPrecision oncology

Identifiers

PMID24664487
PMCPMC3983811
OpenAlexW2170940749

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.