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Lee UJ, Oh Y, Kwon OS, Park JM, Cho HM, Kim DH, Kim M. Single-Cell Detection of Erwinia amylovora Using Bio-Functionalized SIS Sensor. SENSORS (BASEL, SWITZERLAND) 2023; 23:7400. [PMID: 37687855 PMCID: PMC10490433 DOI: 10.3390/s23177400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/13/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023]
Abstract
Herein, we developed a bio-functionalized solution-immersed silicon (SIS) sensor at the single-cell level to identify Erwinia amylovora (E. amylovora), a highly infectious bacterial pathogen responsible for fire blight, which is notorious for its rapid spread and destructive impact on apple and pear orchards. This method allows for ultra-sensitive measurements without pre-amplification or labeling compared to conventional methods. To detect a single cell of E. amylovora, we used Lipopolysaccharide Transporter E (LptE), which is involved in the assembly of lipopolysaccharide (LPS) at the surface of the outer membrane of E. amylovora, as a capture agent. We confirmed that LptE interacts with E. amylovora via LPS through in-house ELISA analysis, then used it to construct the sensor chip by immobilizing the capture molecule on the sensor surface modified with 3'-Aminopropyl triethoxysilane (APTES) and glutaraldehyde (GA). The LptE-based SIS sensor exhibited the sensitive and specific detection of the target bacterial cell in real time. The dose-response curve shows a linearity (R2 > 0.992) with wide dynamic ranges from 1 to 107 cells/mL for the target bacterial pathogen. The sensor showed the value change (dΨ) of approximately 0.008° for growing overlayer thickness induced from a single-cell E. amylovora, while no change in the control bacterial cell (Bacillus subtilis) was observed, or negligible change, if any. Furthermore, the bacterial sensor demonstrated a potential for the continuous detection of E. amylovora through simple surface regeneration, enabling its reusability. Taken together, our system has the potential to be applied in fields where early symptoms are not observed and where single-cell or ultra-sensitive detection is required, such as plant bacterial pathogen detection, foodborne pathogen monitoring and analysis, and pathogenic microbial diagnosis.
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Affiliation(s)
- Ui Jin Lee
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahang-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; (U.J.L.); (Y.O.)
| | - Yunkwang Oh
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahang-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; (U.J.L.); (Y.O.)
| | - Oh Seok Kwon
- SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea;
- Department of Nano Science and Technology, Sungkyunkwan University, Suwon 16419, Republic of Korea
- Department of Nano Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jeong Mee Park
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahang-ro, Yuseong-gu, Daejeon 34141, Republic of Korea;
| | - Hyun Mo Cho
- Division of Advanced Instrumentation Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea;
| | - Dong Hyung Kim
- Division of Advanced Instrumentation Institute, Korea Research Institute of Standards and Science (KRISS), 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea;
| | - Moonil Kim
- Critical Diseases Diagnostics Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), 125 Gwahang-ro, Yuseong-gu, Daejeon 34141, Republic of Korea; (U.J.L.); (Y.O.)
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Guo Z, Zhao X, Zhou Y, Li Y, Liu Z, Luo M, Wu X, Wang Y, Zhang M, Yang X. Label-free detection of cardiac troponin-I with packaged thin-walled microbubble resonators. JOURNAL OF BIOPHOTONICS 2022; 15:e202200151. [PMID: 35762487 DOI: 10.1002/jbio.202200151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/22/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
The measurement of cardiac troponin-I (cTnI) is widely used for diagnosing acute myocardial infarction (AMI) diseases because of its myocardial specificity. Packaged microbubble resonators with thin wall are utilized for label-free and specific detection of cTnI based on whispering gallery mode (WGM). This packaged structure can provide a good protection for the biosensor, improve the anti-interference ability of the sensor and reduce the system noise. The theoretical detection limit of the biosensors for cTnI in phosphate buffer saline (PBS) is 0.4 ag mL-1 (0.02 aM ). Furthermore, we demonstrated that the biosensors can be used to detect cTnI molecules in simulated serum and the theoretical detection limit is also 0.4 ag mL-1 (0.02 aM ). These results are much far below the clinical cut-off value and show a huge application potential for the detection of cardiac biomarkers of AMI.
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Affiliation(s)
- Zhihe Guo
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Xuyang Zhao
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Yi Zhou
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Yuxiang Li
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Zhiran Liu
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Man Luo
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - Xiang Wu
- Department of Optical Science and Engineering, Shanghai Engineering Research Center of Ultra Precision Optical Manufacturing, Fudan University, Shanghai, China
| | - You Wang
- Key Laboratory of Laser Device Technology, China North Industries Group Corporation Limited, Southwest Institute of Technical Physics, Chengdu, China
| | - Meng Zhang
- Key Laboratory of Laser Device Technology, China North Industries Group Corporation Limited, Southwest Institute of Technical Physics, Chengdu, China
| | - Xi Yang
- Key Laboratory of Laser Device Technology, China North Industries Group Corporation Limited, Southwest Institute of Technical Physics, Chengdu, China
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