Evidence map›Paper›PMID 35766492›Full record

ArticleJournal of clinical microbiology2022

COVID-19 Variant Detection with a High-Fidelity CRISPR-Cas12 Enzyme.

Clare L Fasching, Venice Servellita, Bridget McKay, Vaishnavi Nagesh, James P Broughton, Alicia Sotomayor-Gonzalez, Baolin Wang, Noah Brazer, Kevin Reyes, Jessica Streithorst and 8 more

Abstract read
In one paragraph

Article in Journal of clinical microbiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. CRISPR-Cas12a-Based Isothermal Detection ofInternational journal of molecular sciences · 2025
    Article
  3. Review
  4. Article
  5. Review
  6. CRISPR-epigenetic crosstalk: From bidirectional regulation to therapeutic potential.Computational and structural biotechnology journal · 2025
    Review
  7. A Critical Review of the CRISPR-Cas Technology in the Detection of SARS-CoV-2 Variants.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. 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

18 authors.

Clare L Fasching *Mammoth Biosciences, Inc., Brisbane, California, USA.
Venice Servellita *Department of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Bridget McKayMammoth Biosciences, Inc., Brisbane, California, USA.
Vaishnavi NageshMammoth Biosciences, Inc., Brisbane, California, USA.
James P BroughtonMammoth Biosciences, Inc., Brisbane, California, USA.
Alicia Sotomayor-GonzalezDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Baolin WangDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Noah BrazerDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Kevin ReyesDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Jessica StreithorstDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Rachel N DeraneyMammoth Biosciences, Inc., Brisbane, California, USA.
Emma StanfieldMammoth Biosciences, Inc., Brisbane, California, USA.
Carley G HendriksMammoth Biosciences, Inc., Brisbane, California, USA.
Becky FungDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.
Steve MillerDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.ORCID 0000-0002-9188-3392
Jesus ChingMammoth Biosciences, Inc., Brisbane, California, USA.
Janice S ChenMammoth Biosciences, Inc., Brisbane, California, USA.
Charles Y ChiuDepartment of Laboratory Medicine, University of California San Francisco, San Francisco, California, USA.ORCID 0000-0003-2915-2094

Funding

Emory University (Emory)HHS | Centers for Disease Control and Prevention (CDC) 75D30121C10991HHS | NIH | National Institute of Biomedical Imaging and Bioengineering (NIBIB)Innovative Genomics Institute (IGI)Mammoth BiosciencesSandler Program for Breakthrough Biomedical Research
6 · The paper itself

Abstract

Laboratory tests for the accurate and rapid identification of SARS-CoV-2 variants can potentially guide the treatment of COVID-19 patients and inform infection control and public health surveillance efforts. Here, we present the development and validation of a rapid COVID-19 variant DETECTR assay incorporating loop-mediated isothermal amplification (LAMP) followed by CRISPR-Cas12 based identification of single nucleotide polymorphism (SNP) mutations in the SARS-CoV-2 spike (S) gene. This assay targets the L452R, E484K/Q/A, and N501Y mutations, at least one of which is found in nearly all major variants. In a comparison of three different Cas12 enzymes, only the newly identified enzyme CasDx1 was able to accurately identify all targeted SNP mutations. An analysis pipeline for CRISPR-based SNP identification from 261 clinical samples yielded a SNP concordance of 97.3% and agreement of 98.9% (258 of 261) for SARS-CoV-2 lineage classification, using SARS-CoV-2 whole-genome sequencing and/or real-time RT-PCR as test comparators. We also showed that detection of the single E484A mutation was necessary and sufficient to accurately identify Omicron from other major circulating variants in patient samples. These findings demonstrate the utility of CRISPR-based DETECTR as a faster and simpler diagnostic method compared with sequencing for SARS-CoV-2 variant identification in clinical and public health laboratories.

Indexed as

COVID-19SARS-CoV-2Clinical Laboratory TechniquesCOVID-19 TestingCRISPR-Cas SystemsHumansMutationSensitivity and Specificityassay validationCOVID-19CRISPR-Cas12DETECTRguide RNAsLAMPSARS coronavirus 2SARS-CoV-2variantviral mutations

Identifiers

PMID35766492
PMCPMC9297821

What OpenQuestion holds

Textmetadata
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.