iScience (Feb 2022)

CRISPR-Cas3-based diagnostics for SARS-CoV-2 and influenza virus

  • Kazuto Yoshimi,
  • Kohei Takeshita,
  • Seiya Yamayoshi,
  • Satomi Shibumura,
  • Yuko Yamauchi,
  • Masaki Yamamoto,
  • Hiroshi Yotsuyanagi,
  • Yoshihiro Kawaoka,
  • Tomoji Mashimo

Journal volume & issue
Vol. 25, no. 2
p. 103830

Abstract

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Summary: CRISPR-based diagnostics (CRISPR-dx), including the Cas12-based DETECTR and Cas13-based SHERLOCK Class 2 CRISPRs, have been used to detect the presence of DNA or RNA from pathogens, such as the 2009 pandemic influenza virus A (IAV) and the 2019 novel coronavirus SARS-CoV-2. Here, we describe the collateral single-stranded DNA cleavage with Class 1 type I CRISPR-Cas3 and highlight its potential for development as a Cas3-mediated rapid (within 40 min), low-cost, instrument-free detection method for SARS-CoV-2. This assay, which we call Cas3-Operated Nucleic Acid detectioN (CONAN), not only detects SARS-CoV-2 in clinical samples, but also offers specific detection of single-base-pair mutations in IAV variants. This tool allows rapid and accurate point-of-care testing for patients with suspected SARS-CoV-2 or drug-resistant IAV infections in hospitals.

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