TB-QUICK: CRISPR-Cas12b-assisted rapid and sensitive detection of Mycobacterium tuberculosis

•TB-QUICK combines LAMP amplification and CRISPR-Cas12b reaction for M. tuberculosis detection.•TB-QUICK detection is isothermal, ultra-sensitive and rapid.•TB-QUICK exhibits 86.8% sensitivity and 95.2% specificity in pulmonary TB specimens.•TB-QUICK is of great advantages for smear-negative TB pati...

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Veröffentlicht in:The Journal of infection 2021-07, Vol.83 (1), p.54-60
Hauptverfasser: Sam, I Kuan, Chen, Ying-ying, Ma, Jun, Li, Shi-yuan, Ying, Ruo-yan, Li, Lin-xian, Ji, Ping, Wang, Shu-jun, Xu, Jie, Bao, Yu-jie, Zhao, Guo-ping, Zheng, Hua-jun, Wang, Jin, Sha, Wei, Wang, Ying
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Sprache:eng
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Zusammenfassung:•TB-QUICK combines LAMP amplification and CRISPR-Cas12b reaction for M. tuberculosis detection.•TB-QUICK detection is isothermal, ultra-sensitive and rapid.•TB-QUICK exhibits 86.8% sensitivity and 95.2% specificity in pulmonary TB specimens.•TB-QUICK is of great advantages for smear-negative TB patients. Tuberculosis (TB) remains one of the public health problems worldwide. Rapid, sensitive and cost-effective diagnosis of Mycobacterium tuberculosis (M.tb) is critical for TB control. We developed a novel M.tb DNA detection platform (nominated as TB-QUICK) which combined loop-mediated isothermal amplification (LAMP) and CRISPR-Cas12b detection. TB-QUICK was performed on pulmonary or plasma samples collected from 138 pulmonary TB (PTB) patients, 21 non-TB patients and 61 close contacts to TB patients. Acid-fast bacillus (AFB) smear, M.tb culture and GeneXpert MTB/RIF (Xpert) assays were routinely conducted in parallel. By targeting M.tb IS6110, TB-QUICK platform could detect as low as 1.3 copy/μL M.tb DNA within 2 h. In pulmonary TB samples, TB-QUICK exhibited improved overall sensitivity of 86.8% over M.tb culture (66.7%) and Xpert (70.4%), with the specificity of 95.2%. More significantly, TB-QUICK exhibited a superior sensitivity in AFB-negative samples (80.5%) compared to Xpert (57.1%) and M.tb culture (46.2%). In the detection of plasma M.tb DNA by TB-QUICK, 41.2% sensitivity for AFB-positive and 31.7% for AFB-negative patients were achieved. In conclusion, TB-QUICK exhibits rapidity and sensitivity for M.tb DNA detection with the superiority in smear-negative paucibacillary TB patients. The clinical application of TB-QUICK in TB diagnosis needs to be further validated in larger cohort. [Display omitted]
ISSN:0163-4453
1532-2742
DOI:10.1016/j.jinf.2021.04.032