4.7 Article

RPA/CRISPR/Cas12a-Based On-Site and Rapid Nucleic Acid Detection of Toxoplasma gondii in the Environment

期刊

ACS SYNTHETIC BIOLOGY
卷 11, 期 5, 页码 1772-1781

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acssynbio.1c00620

关键词

Toxoplasma gondii; RPA; CRISPR; Cas12a; visualized diagnosis; on-site detection; lateral flow strip

资金

  1. Basic Scientific Research Foundation of Chinese Academy of Inspection and Quarantine [2020JK048]
  2. National Natural Science Foundation of China [31672546, 32072891]
  3. Department of Science & Technology of Liaoning Province [2019-MS-270]
  4. Research Foundation of Educational Department of Liaoning Province [LSNZD201901]
  5. Innovative Talents of Colleges and Universities in Liaoning Province [LR2019064]
  6. LiaoNing Revitalization Talents Program [XLYC1907091]
  7. State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences [SKLVEB2020KFKT012]

向作者/读者索取更多资源

A portable one-pot detection system for Toxoplasma gondii was developed, combining recombinase polymerase amplification (RPA) and CRISPR/Cas12a system. The system showed high selectivity and a limit of detection of 3.3 copies/μL. It has the advantages of rapidness, robustness, and on-site features, making it a promising tool for field applications in remote areas.
Toxoplasma gondiiis an opportunistic pathogen widely distributed within the world, poses a huge threat to humanhealth, and causes significant economic losses to the livestock industry. Herein, we developed a portable one-pot detection ofT. gondiiby combining recombinase polymerase amplification (RPA) and a clustered regularly interspaced short palindromic repeats(CRISPR)/Cas12a system. A glass microfiberfilter device used for thefirst step can efficiently extractT. gondiifrom low-concentration samples. The lyophilized RPA reagents and Cas12a/crRNA reagents are prestored in one Eppendorf tube, and bothreactions can be performed on a low-cost thermal controller (similar to 37 degrees C), avoiding the drawbacks of the step-by-step addition ofcomponents. The developed RPA/CRISPR/Cas12a system exhibits a high selectivity toward the B1 gene amplicon ofT. gondiioverother parasites with a limit of detection of 3.3 copies/mu L. The visual signal readout can be easily realized by afluorometer or lateral-flow strip. A portable suitcase containing the minimum equipment and lyophilized reagents was adopted for the rapid determinationofT. gondiiin heavily polluted landfill leachate. This system presents rapidness, robustness and on-site features for the detection ofnucleic acids of the parasite, making it a promising tool for field applications in remote areas

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