Evidence map›Paper›PMID 33199817›Full record

ArticleScientific reports2020

Development and validation of a 4-color multiplexing spinal muscular atrophy (SMA) genotyping assay on a novel integrated digital PCR instrument.

Lingxia Jiang, Robert Lin, Steve Gallagher, Andrew Zayac, Matthew E R Butchbach, Paul Hung

Registry-linked trialOpen access · goldAbstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02532244 (Genetics of Pediatric-Onset Motor Neuron and Neuromuscular Diseases), which is not on this map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.2field-weighted citation impact, top 11% 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.

NCT02532244 completednot on this map

Genetics of Pediatric-Onset Motor Neuron and Neuromuscular Diseases

TypeobservationalSponsorNemours Children's ClinicRan2015 to 2024Enrolled230ConditionsSpinal Muscular Atrophy, Charcot-Marie-Tooth Disease, Muscular Dystrophy, Spinal Muscular Atrophy With Respiratory Distress 1Armssample collection
3 · Its place in the literature

Who cites it

17 citing papers in PubMed, 25 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Validation on the First-Tier Fully Automated High-ThroughputInternational journal of neonatal screening · 2025
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Genomic Variability in the Survival Motor Neuron Genes (International journal of molecular sciences · 2021
    Review
  17. 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

6 authors at 1 institution in 1 country.

Lingxia JiangCombinati Inc., 2450 Embarcadero Way, Palo Alto, CA, 94303, USA. lingxia@combinati.com.
Robert LinCombinati Inc., 2450 Embarcadero Way, Palo Alto, CA, 94303, USA.
Steve GallagherCombinati Inc., 2450 Embarcadero Way, Palo Alto, CA, 94303, USA.
Andrew ZayacCombinati Inc., 2450 Embarcadero Way, Palo Alto, CA, 94303, USA.
Matthew E R ButchbachCenter for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA.
Paul HungCombinati Inc., 2450 Embarcadero Way, Palo Alto, CA, 94303, USA.
Thomas Jefferson University · US

Funding

Center for Pediatric ResearchP20GM103464 · NIGMS · NEMOURS CHILDREN'S HOSPITAL, DELAWARE · PI SHAFFER, THOMAS H · 2012 to 2014
$5.6M
Array Imaging digital PCR PlatformR44OD023028 · OD · COMBINATI, INC. · PI HUNG, PAUL JU-SUNG · 2018 to 2020
$1.8M
NIGMS NIH HHS P20 GM103464NIH HHS P20GM103464NIH HHS R44 OD023028NIH HHS R44OD023028
6 · The paper itself

Abstract

Digital PCR (dPCR) technology has been proven to be highly sensitive and accurate in detecting copy number variations (CNV). However, a higher-order multiplexing dPCR assay for measuring SMN1 and SMN2 copy numbers in spinal muscular atrophy (SMA) samples has not been reported. Described here is a rapid multiplex SMA dPCR genotyping assay run on a fully integrated dPCR instrument with five optical channels. The hydrolysis probe-based multiplex dPCR assay quantifies SMN1, SMN2, and the total SMN (SMN1 + SMN2) while using RPPH1 gene as an internal reference control. The quadruplex assay was evaluated with characterized control DNA samples and validated with 15 blinded clinical samples from a previously published study. SMN1 and SMN2 copy numbers were completely concordant with previous results for both the control and blinded samples. The dPCR-based SMA copy number determination was accomplished in 90 min with a walk-away workflow identical to real-time quantitative PCR (qPCR). In summary, presented here is a simple higher-order multiplexing solution on a novel digital PCR platform to meet the growing demand for SMA genotyping and prognostics.

Indexed as

DNA Copy Number VariationsCase-Control StudiesGenotypeHumansMultiplex Polymerase Chain ReactionMuscular Atrophy, SpinalReal-Time Polymerase Chain ReactionSurvival of Motor Neuron 1 ProteinSurvival of Motor Neuron 2 ProteinSMN1 protein, humanSMN2 protein, humanSurvival of Motor Neuron 1 ProteinSurvival of Motor Neuron 2 Protein

Identifiers

PMID33199817
PMCPMC7670453
OpenAlexW3105676227

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.