Evidence map›Paper›PMID 38774978›Full record

ArticleCurrent protocols2024

Validation of Single-Nucleotide Mosaic Variants Through Droplet Digital PCR.

Christopher M Grochowski, Richard A Gibbs, Harsha Doddapaneni

Abstract readValidation Study
In one paragraph

Article in Current protocols, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
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

3 citing papers in PubMed.

  1. Article
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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

3 authors.

Christopher M GrochowskiHuman Genome Sequencing Center, Baylor College of Medicine, Houston, Texas.ORCID https://orcid.org/0000-0002-3884-7720
Richard A GibbsHuman Genome Sequencing Center, Baylor College of Medicine, Houston, Texas.
Harsha DoddapaneniHuman Genome Sequencing Center, Baylor College of Medicine, Houston, Texas.

Funding

Comprehensive Somatic Variant Characterization at the HGSCUM1DA058229 · NIDA · BAYLOR COLLEGE OF MEDICINE · PI Harsha Vardhan Doddapaneni, RICHARD A GIBBS · 2023 to 2026
$15.0M
NIDA NIH HHS UM1 DA058229NIH HHS 1UM1DA058229
6 · The paper itself

Abstract

The detection, validation, and subsequent interpretation of potentially mosaic single-nucleotide variants (SNV) within next-generation sequencing data remains a challenge in both research and clinical laboratory settings. The ability to identify mosaic variants in high genome coverage sequencing data at levels of ≤1% underscores the necessity for developing guidelines and best practices to verify these variants orthogonally. Droplet digital PCR (ddPCR) has proven to be a powerful and precise method that allows for the determination of low-level variant fractions within a given sample. Herein we describe two precise ddPCR methods using either a fluorescent TaqMan hydrolysis probe approach or an EvaGreen fluorescent dye protocol. The TaqMan approach relies on two different fluorescent probes (FAM and HEX/VIC), each designed to amplify selectively only in the presence of a single nucleotide change denoting the variant or reference position. The fractional abundance is then calculated to determine the relative quantities of both alleles in the final sample. The EvaGreen protocol relies on two independent reactions with oligonucleotide primers designed with the single nucleotide change denoting the variant at the penultimate position of the primer. The relative amplification efficiency of both primer sets (reference and variant) can be compared to determine the mosaic level of a given variant. As the cost of high-coverage sequencing continues to decrease, the identification of potentially mosaic variants will also increase. The approaches outlined will allow clinicians and researchers a more precise determination of the true mosaic level of a given variant allowing them to better assess not only its potential pathogenicity but also its possible recurrence risk when offering genetic counseling to families. © 2024 Wiley Periodicals LLC. Basic Protocol: Droplet digital PCR (ddPCR) with TaqMan hydrolysis probes Alternate Protocol: EvaGreen oligonucleotide-specific ddPCR.

Indexed as

Polymerase Chain ReactionPolymorphism, Single NucleotideFluorescent DyesHigh-Throughput Nucleotide SequencingHumansMosaicismFluorescent Dyesdroplet digital PCR (ddPCR)EvaGreenmosaicismnext‐generation sequencingsingle‐nucleotide variant (SNV)TaqMan

Identifiers

PMID38774978
PMCPMC11115377

What OpenQuestion holds

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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.