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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Author Spotlight: Advancements in Multiplex Detection of Respiratory Viruses
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Molecular Mirror Technology Facilitates High-Throughput, Accurate SARS-CoV-2 Testing.

Susan Realegeno1, Sara Hash2, Charlene Wong2

  • 1Department of Pathology, University of California, San Diegogrid.266100.3, La Jolla, California, USA.

Microbiology Spectrum
|August 25, 2021
PubMed
Summary

A new Molecular Mirror assay (MMA) shows high accuracy for detecting SARS-CoV-2, comparable to PCR tests. An extraction-free version offers faster results, addressing global testing supply chain limitations.

Keywords:
COVID-19Molecular MirrorSARS-CoV-2automationnuclear magnetic resonancenucleic acid amplification

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Area of Science:

  • Biotechnology and Biomedical Diagnostics
  • Infectious Disease Detection
  • Nuclear Magnetic Resonance Applications

Background:

  • Accurate SARS-CoV-2 diagnostics are crucial for pandemic control.
  • Existing PCR tests offer reliability but face scalability challenges.
  • Rapid antigen tests are faster but less sensitive, with global supply chain issues.

Purpose of the Study:

  • To evaluate the diagnostic efficacy of the Molecular Mirror assay (MMA) for SARS-CoV-2 detection.
  • To compare MMA performance with and without nucleic acid extraction against a gold standard RT-PCR assay.
  • To assess MMA's potential to address limitations in current SARS-CoV-2 testing.

Main Methods:

  • Evaluated MMA using nucleic acid extraction and an extraction-free method on nasal specimens.
  • Compared MMA performance to the EUA-approved TaqPath reverse transcriptase PCR (RT-PCR) assay.
  • Calculated positive percent agreement (PPA) and negative percent agreement (NPA) for both MMA methods.

Main Results:

  • MMA with nucleic acid extraction demonstrated high diagnostic accuracy: 99.1% PPA and 99.3% NPA.
  • The extraction-free MMA showed acceptable performance: 87.8% PPA and 100.0% NPA.
  • The extraction-free method offers a more rapid and higher-throughput alternative.

Conclusions:

  • Nuclear magnetic resonance (NMR) detection is a viable method for SARS-CoV-2 diagnostics.
  • MMA, particularly the extraction-free version, can supplement existing testing options.
  • The MMA technology may help overcome supply chain shortages and improve global testing capacity.