Evidence map›Paper›PMID 30430876›Full record

ArticleAmyotrophic lateral sclerosis & frontotemporal degeneration2019

Comprehensive genotyping of the C9orf72 hexanucleotide repeat region in 2095 ALS samples from the NINDS collection using a two-mode, long-read PCR assay.

Eran Bram, Kamyab Javanmardi, Kimberly Nicholson, Kristen Culp, Julie R Thibert, Jon Kemppainen, Vivian Le, Annette Schlageter, Andrew Hadd, Gary J Latham

Open access · hybridAbstract read
In one paragraph

Article in Amyotrophic lateral sclerosis & frontotemporal degeneration, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.0field-weighted citation impact, top 23% 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

15 citing papers in PubMed, 17 citations in OpenAlex.

  1. Article
  2. Repeat expansions inbioRxiv : the preprint server for biology · 2026
    Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Distribution of theFrontiers in neurology · 2024
    Article
  9. Genetic modifiers of repeat expansion disorders.Emerging topics in life sciences · 2023
    Article
  10. Evidence-based consensus guidelines for ALS genetic testing and counseling.Annals of clinical and translational neurology · 2023
    Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Article
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

10 authors at 1 institution in 1 country.

Eran Brama Asuragen, Inc , Austin , TX , USA.ORCID 0000-0002-7213-5321
Kamyab Javanmardia Asuragen, Inc , Austin , TX , USA.
Kimberly Nicholsona Asuragen, Inc , Austin , TX , USA.
Kristen Culpa Asuragen, Inc , Austin , TX , USA.
Julie R Thiberta Asuragen, Inc , Austin , TX , USA.
Jon Kemppainena Asuragen, Inc , Austin , TX , USA.
Vivian Lea Asuragen, Inc , Austin , TX , USA.
Annette Schlagetera Asuragen, Inc , Austin , TX , USA.
Andrew Hadda Asuragen, Inc , Austin , TX , USA.
Gary J Lathama Asuragen, Inc , Austin , TX , USA.
Asuragen (United States) · US

Funding

Development of an information-rich assay for C9ORF72 as a test for ALS and FTDR44NS089423 · NINDS · ASURAGEN, INC. · PI STATT, SARAH NICOLE · 2016 to 2017
$1.4M
NINDS NIH HHS R44 NS089423
6 · The paper itself

Abstract

objectiveExpansion of the G

methodsA single-tube 3-primer PCR assay mode, resolved using capillary electrophoresis, was used for sizing up to 145 repeats with single-repeat accuracy, for detecting expansions irrespective of their overall size, and for flagging confounding 3' sequence variations (SVs). A modified two-primer PCR mode, resolved via agarose gel electrophoresis, provided further size information for hyper-expanded samples (>145 repeats) up to ∼5.8 kb amplicons (∼950 G

resultsWithin the evaluated cohort, 177 (8.4%) samples were expanded, with 175 (99%) samples being hyper-expanded. 3'-SVs were identified in 64 (3.1%) samples, and were most common in expanded alleles. Genotypes of all 606 (29%) homozygous samples were confirmed using an orthogonal PCR assay.

conclusionThis study and PCR method may improve and standardize molecular characterization of the C9orf72 locus, and have the potential to inform phenotype-genotype correlations and therapeutic development in ALS/FTD.

Indexed as

Amyotrophic Lateral SclerosisC9orf72 ProteinDNA Repeat ExpansionGenotyping TechniquesHumansPolymerase Chain ReactionC9orf72 ProteinC9orf72 protein, humanamyotrophic lateral sclerosisC9orf72frontotemporal dementiaGGGGCC hexanucleotide repeatmicrosatelliterepeat-primed PCR

Identifiers

PMID30430876
PMCPMC6513680
OpenAlexW2900700686

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.