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논문 기본 정보

자료유형
학술저널
저자정보
Cao Hongli (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Zhang Guosheng (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Ma Hui (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Xue Zhongwen (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Huo Ran (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Wang Kun (Emergency Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China) Liu Zijin (Orthopedic Rehabilitation Department, Beijing Rehabilitation Hospital, Capital Medical University, Beijing 100144, P.R. China)
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology Vol.34 No.1
발행연도
2024.1
수록면
192 - 197 (6page)
DOI
10.4014/jmb.2308.08044

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Refractory infections, such as hospital-acquired pneumonia, can be better diagnosed with the assistance of precise methicillin-resistant Staphylococcus aureus (MRSA) testing. However, traditional methods necessitate high-tech tools, rigorous temperature cycling, and the extraction of genetic material from MRSA cells. Herein, we propose a sensitive, specific, and extraction-free strategy for MRSA detection by integrating allosteric probe-based target recognition and exonuclease-III (ExoIII)-enhanced color reaction. The penicillin-binding protein 2a (PBP2a) aptamer in the allosteric probe binds with MRSA to convert protein signals to nucleic acid signals. This is followed by the DNA polymerase-assisted target recycle and the production of numerous single-strand DNA (ssDNA) chains which bind with silver ion (Ag+ ) aptamer to form a blunt terminus that can be identified by Exo-III. As a result, the Ag+ aptamer pre-coupled to magnetic nanoparticles is digested. After magnetic separation, the Ag+ in liquid supernatant catalyzes 3,3’,5,5’-tetramethylbenzidine (TMB) for a color reaction. In addition, a concentration of 54 cfu/mL is predicted to be the lowest detectable value. Based on this, our assay has a wide linear detection range, covering 5 orders of magnitude and demonstrating a high specificity, which allows it to accurately distinguish the target MRSA from other microorganisms.

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