Evidence map›Paper›PMID 29466940›Full record

ArticleBMC genomics2018

Analytical parameters and validation of homopolymer detection in a pyrosequencing-based next generation sequencing system.

Gergely Ivády, László Madar, Erika Dzsudzsák, Katalin Koczok, János Kappelmayer, Veronika Krulisova, Milan Macek, Attila Horváth, István Balogh

Open access · goldAbstract readValidation Study
In one paragraph

Article in BMC genomics, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
1.7field-weighted citation impact, top 17% 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. The Evolution of Next-Generation Sequencing Technologies.Methods in molecular biology (Clifton, N.J.) · 2025
    Review
  5. Article
  6. Article
  7. Article
  8. Assessment of Microsatellite Instability from Next-Generation Sequencing Data.Advances in experimental medicine and biology · 2022
    Article
  9. Article
  10. Article
  11. Article
  12. Review
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

9 authors at 2 institutions in 2 countries.

Gergely IvádyDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary.
László MadarDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary.
Erika DzsudzsákDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary.
Katalin KoczokDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary.
János KappelmayerDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary.
Veronika KrulisovaDepartment of Biology and Medical Genetics, Second Faculty of Medicine and University Hospital Motol, Charles University, Prague, Czech Republic.
Milan MacekDepartment of Biology and Medical Genetics, Second Faculty of Medicine and University Hospital Motol, Charles University, Prague, Czech Republic.
Attila HorváthGenomic Medicine and Bioinformatic Core Facility, University of Debrecen, Debrecen, Hungary.
István BaloghDepartment of Laboratory Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary. balogh@med.unideb.hu.
University of Debrecen · HUCharles University · CZ

Funding

European Regional Development Fund Prague CZ.2.16/3.1.00/24022OPPKMinisterstvo Zdravotnictví Ceské Republiky 00064203Ministry of National Economy, Hungary GINOP-2.3.2-15-2016-00039New National Excellence Program of the Ministry of Human Capacities UNKP-16-3 IV/4Norway Grants NF-CZ11-PDP-3-003-2014, LM2015091 and COST-LD14073Országos Tudományos Kutatási Alapprogramok K109076
6 · The paper itself

Abstract

backgroundCurrent technologies in next-generation sequencing are offering high throughput reads at low costs, but still suffer from various sequencing errors. Although pyro- and ion semiconductor sequencing both have the advantage of delivering long and high quality reads, problems might occur when sequencing homopolymer-containing regions, since the repeating identical bases are going to incorporate during the same synthesis cycle, which leads to uncertainty in base calling. The aim of this study was to evaluate the analytical performance of a pyrosequencing-based next-generation sequencing system in detecting homopolymer sequences using homopolymer-preintegrated plasmid constructs and human DNA samples originating from patients with cystic fibrosis.

resultsIn the plasmid system average correct genotyping was 95.8% in 4-mers, 87.4% in 5-mers and 72.1% in 6-mers. Despite the experienced low genotyping accuracy in 5- and 6-mers, it was possible to generate amplicons with more than a 90% adequate detection rate in every homopolymer tract. When homopolymers in the CFTR gene were sequenced average accuracy was 89.3%, but varied in a wide range (52.2 - 99.1%). In all but one case, an optimal amplicon-sequencing primer combination could be identified. In that single case (7A tract in exon 14 (c.2046_2052)), none of the tested primer sets produced the required analytical performance.

conclusionsOur results show that pyrosequencing is the most reliable in case of 4-mers and as homopolymer length gradually increases, accuracy deteriorates. With careful primer selection, the NGS system was able to correctly genotype all but one of the homopolymers in the CFTR gene. In conclusion, we configured a plasmid test system that can be used to assess genotyping accuracy of NGS devices and developed an accurate NGS assay for the molecular diagnosis of CF using self-designed primers for amplification and sequencing.

Indexed as

Tandem Repeat SequencesCystic FibrosisCystic Fibrosis Transmembrane Conductance RegulatorHigh-Throughput Nucleotide SequencingHumansPlasmidsSequence Analysis, DNACFTR protein, humanCystic Fibrosis Transmembrane Conductance RegulatorCystic fibrosisHomopolymer detectionPyrosequencing

Identifiers

PMID29466940
PMCPMC5822529
OpenAlexW2807488560

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.