化学
环介导等温扩增
金黄色葡萄球菌
生物传感器
清脆的
酶
计算生物学
细菌
生物化学
基因
DNA
遗传学
生物
作者
Hongmin Gao,Hehua Zhang,Xue Qi,Meng Miao,Longbin Que,Xin Gu,Dong Chang,Hongzhi Pan
出处
期刊:Talanta
[Elsevier]
日期:2024-10-10
卷期号:282: 127013-127013
标识
DOI:10.1016/j.talanta.2024.127013
摘要
Accurate and reliable detection of Staphylococcus aureus (S. aureus) is essential for preventing infections, particularly in healthcare and food safety contexts. This work presents a novel dual-mode biosensor that integrates the CRISPR/Cas12a system with an enzyme-free isothermal amplification method for detecting S. aureus. Hybridization chain reaction (HCR) and catalytic hairpin assembly (CHA) amplify the aptamer-triggered response, significantly enhancing sensitivity. CRISPR/Cas12a's nuclease activity is utilized in two modes: cis cleavage generates a fluorescence signal, while trans cleavage produces an electrochemical signal, enabling dual-mode detection. The biosensor demonstrates outstanding performance, with a limit of detection (LOD) as low as 5.7 CFU mL
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