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CRISPR-based quantum dot nanobead lateral flow assay for facile detection of varicella-zoster virus

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Abstract

Varicella-zoster virus (VZV) infects more than 90% of the population worldwide and has a high incidence of postherpetic neuralgia in elderly patients, seriously affecting their quality of life. Combined with clustered regularly interspaced short palindromic repeats (CRISPR) system, we develop a quantum dot nanobeads (QDNBs) labeled lateral flow assay for VZV detection. Our assay allows the identification of more than 5 copies of VZV genomic DNA in each reaction. The entire process, from sample preparation to obtaining the results, takes less than an hour. In 86 clinical vesicles samples, the test shows 100% concordance with quantitative real-time PCR for VZV detection. Notably, when vesicles are present in specific areas, such as the genitals, our method outperforms clinical diagnosis. Compared to traditional detection methods, only a minute amount of blister fluid is required for accurate detection. Therefore, we anticipate that our method could be translated to clinical applications for specific and rapid VZV detection.

Key Points

CRISPR/Cas12a and quantum dot nanobead-based lateral flow assay achieved 5 copies per reaction for VZV detection

Specific identification of VZV in atypical skin lesions

Results read by the naked eye within one hour

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All data generated or analyzed during this study are included in this published article (and its supplementary information files).

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Funding

This study was supported by grants from Program of the Science and Technology Commission of Shanghai Municipality “Science and Technology Innovation Action Plan” Medical Innovation Research Special Project (grant/award number: 22Y11905700), Program of Shanghai Municipal Health Commission (grant/award number: 2020YJZX0108), and Anhui Provincial Education Department Scientific Research Project (Grant/Award Number: YJS20210323).

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Authors

Contributions

XZ: investigation, methodology, data curation, and writing—original draft. QF: project administration and data curation. YW: project administration and data curation. LL: investigation and data curation. WJ: investigation and sample collection. MC: data curation. HX: data curation. PZ: supervision and conceptualization. FT: supervision and writing—review and editing. All authors read and approved the manuscript.

Corresponding authors

Correspondence to Pengfei Zhang or Fei Tan.

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Ethics approval

This study was performed in line with the principles of the Declaration of Helsinki. Approval was granted by the Clinical Trial Ethics Committee of Shanghai Dermatology Hospital (no. 201811).

Conflict of interest

The authors declare no competing interests.

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Zhong, X., Fu, Q., Wang, Y. et al. CRISPR-based quantum dot nanobead lateral flow assay for facile detection of varicella-zoster virus. Appl Microbiol Biotechnol 107, 3319–3328 (2023). https://doi.org/10.1007/s00253-023-12509-0

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  • DOI: https://doi.org/10.1007/s00253-023-12509-0

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