Highly sensitive detection of aflatoxin B1 byCRISPR/Cas12a-assisted single nanoparticle counting
Copyright © 2024 Elsevier Ltd. All rights reserved..
CRISPR (clustered regularly interspaced short palindromic repeats) and CRISPR-associated protein (Cas) have gained extensive applications in bioassays. However, CRISPR-based detection platforms are often hampered by limited analytical sensitivity, while nucleic acid-based amplification strategies are usually indispensable for additional signal enhancement with potential risks of amplification leakages. To address these challenges, an amplification-free CRISPR-based bioassay of aflatoxin B1 (AFB1) was proposed by applying single nanoparticle counting. Single-particle mode inductively coupled plasma mass spectrometry (Sp-ICPMS) has been regarded as a sensitive tool for nanoparticle counting since one nanoparticle can generate considerable signals above backgrounds. With AFB1, activator strands were introduced to initiate the trans-cleavage of CRISPR/Cas12a for cutting the nanoparticles-tagged-magnetic beads, which were transduced to nanoparticle count signals after separation. Finally, a pico-mole level limit-of-detections (LODs) with moderate selectivity was achieved. Certified reference materials (CRMs) analysis and recovery tests were conducted with promising results. To our best knowledge, this is the first report of the single particle counting-based CRISPR/Cas12a biosensing study.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:443 |
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| Enthalten in: |
Food chemistry - 443(2024) vom: 15. Feb., Seite 138557 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Zhang, Chengchao [VerfasserIn] |
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| Links: |
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| Themen: |
9N2N2Y55MH |
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| Anmerkungen: |
Date Completed 27.02.2024 Date Revised 27.02.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.foodchem.2024.138557 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a CRISPR (clustered regularly interspaced short palindromic repeats) and CRISPR-associated protein (Cas) have gained extensive applications in bioassays. However, CRISPR-based detection platforms are often hampered by limited analytical sensitivity, while nucleic acid-based amplification strategies are usually indispensable for additional signal enhancement with potential risks of amplification leakages. To address these challenges, an amplification-free CRISPR-based bioassay of aflatoxin B1 (AFB1) was proposed by applying single nanoparticle counting. Single-particle mode inductively coupled plasma mass spectrometry (Sp-ICPMS) has been regarded as a sensitive tool for nanoparticle counting since one nanoparticle can generate considerable signals above backgrounds. With AFB1, activator strands were introduced to initiate the trans-cleavage of CRISPR/Cas12a for cutting the nanoparticles-tagged-magnetic beads, which were transduced to nanoparticle count signals after separation. Finally, a pico-mole level limit-of-detections (LODs) with moderate selectivity was achieved. Certified reference materials (CRMs) analysis and recovery tests were conducted with promising results. To our best knowledge, this is the first report of the single particle counting-based CRISPR/Cas12a biosensing study | ||
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| 700 | 1 | |a Hu, Jianyu |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Rui |e verfasserin |4 aut | |
| 700 | 1 | |a Lv, Yi |e verfasserin |4 aut | |
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