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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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de Chaves MQG, Morán F, Barbé S, Bertolini E, de la Rosa FS, Marco-Noales E. A new and accurate qPCR protocol to detect plant pathogenic bacteria of the genus 'Candidatus Liberibacter' in plants and insects. Sci Rep 2023; 13:3338. [PMID: 36849507 PMCID: PMC9971166 DOI: 10.1038/s41598-023-30345-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 02/21/2023] [Indexed: 03/01/2023] Open
Abstract
Four pathogenic bacterial species of the genus 'Candidatus Liberibacter', transmitted by psyllid vectors, have been associated with serious diseases affecting economically important crops of Rutaceae, Apiaceae and Solanaceae families. The most severe disease of citrus plants, huanglongbing (HLB), is associated with 'Ca. Liberibacter asiaticus' (CaLas), 'Ca. Liberibacter americanus' (CaLam) and 'Ca. Liberibacter africanus' (CaLaf), while 'Ca. Liberibacter solanacearum' (CaLsol) is associated with zebra chip disease in potatoes and vegetative disorders in apiaceous plants. Since these bacteria remain non-culturable and their symptoms are non-specific, their detection and identification are done by molecular methods, mainly based on PCR protocols. In this study, a new quantitative real-time PCR protocol based on TaqMan probe, which can also be performed in a conventional PCR version, has been developed to detect the four known phytopathogenic species of the genus Liberibacter. The new protocol has been validated according to European Plant Protection Organization (EPPO) guidelines and is able to detect CaLas, CaLam, CaLaf and CaLsol in both plants and vectors, not only using purified DNA but also using crude extracts of potato and citrus or psyllids. A comparative analysis with other previously described qPCR protocols revealed that this new one developed in this study is more specific and equally or more sensitive. Thus, other genus-specific qPCR protocols have important drawbacks regarding the lack of specificity, while with the new protocol there was no cross-reactions in 250 samples from 24 different plant and insect species from eight different geographical origins. Therefore, it can be used as a rapid and time-saving screening test, as it allows simultaneous detection of all plant pathogenic species of 'Ca. Liberibacter' in a one-step assay.
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Affiliation(s)
- María Quintana-González de Chaves
- grid.493405.f0000 0004 1793 4432Unidad de Protección Vegetal, Instituto Canario de Investigaciones Agrarias (ICIA), 38270 Tenerife, Spain
| | - Félix Morán
- grid.419276.f0000 0000 9605 0555Unidad de Bacteriología, Centro de Protección Vegetal y Biotecnología. Instituto Vaslenciano de Investigaciones Agrarias (IVIA), 46113 Valencia, Spain
| | - Silvia Barbé
- grid.419276.f0000 0000 9605 0555Unidad de Bacteriología, Centro de Protección Vegetal y Biotecnología. Instituto Vaslenciano de Investigaciones Agrarias (IVIA), 46113 Valencia, Spain
| | - Edson Bertolini
- grid.8532.c0000 0001 2200 7498Department of Plant Health, Faculty of Agronomys, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, 91540-000 Brazil
| | - Felipe Siverio de la Rosa
- grid.493405.f0000 0004 1793 4432Unidad de Protección Vegetal, Instituto Canario de Investigaciones Agrarias (ICIA), 38270 Tenerife, Spain
| | - Ester Marco-Noales
- Unidad de Bacteriología, Centro de Protección Vegetal y Biotecnología. Instituto Vaslenciano de Investigaciones Agrarias (IVIA), 46113, Valencia, Spain.
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Holeva MC, Morán F, Scuderi G, González A, López MM, Llop P. Development of a real-time PCR method for the specific detection of the novel pear pathogen Erwinia uzenensis. PLoS One 2019; 14:e0219487. [PMID: 31291321 PMCID: PMC6619794 DOI: 10.1371/journal.pone.0219487] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 06/25/2019] [Indexed: 11/24/2022] Open
Abstract
Erwinia uzenensis is a plant-pathogenic bacterium, recently described in Japan, which infects pear trees, causing the ‘bacterial black shoot disease of European pear’ (BBSDP). Like other Erwinia pear pathogens, E. uzenensis causes damp, black lesions on young shoots resembling those of E. amylovora, but not blossom blight, fruitlet blight or wilting of the shoot tip. The distribution of E. uzenensis seems restricted to the country where it was reported up to now, but it may spread to other countries and affect new hosts, as is the current situation with E. piriflorinigrans and E. pyrifoliae. Fast and accurate detection systems for this new pathogen are needed to study its biology and to identify it on pear or other hosts. We report here the development of a specific and sensitive detection protocol based on a real-time PCR with a TaqMan probe for E. uzenensis, and its evaluation. In sensitivity assays, the detection threshold of this protocol was 101 cfu ml-1 on pure bacterial cultures and 102–103 cfu ml-1 on spiked plant material. The specificity of the protocol was evaluated against E. uzenensis and 46 strains of pear-associated Erwinia species different to E. uzenensis. No cross-reaction with the non-target bacterial species or the loss of sensitivity were observed. This specific and sensitive diagnostic tool may reveal a wider distribution and host range of E. uzenensis initially considered restricted to a region and will expand our knowledge of the life cycle and environmental preferences of this pathogen.
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Affiliation(s)
- Maria C. Holeva
- Laboratory of Bacteriology, Department of Plant Pathology, Benaki Phytopathological Institute, Kifissia, Attica, Greece
| | - Félix Morán
- Laboratory of Bacteriology, Department of Plant Pathology, Instituto Valenciano de Investigaciones Agrarias (IVIA), Moncada, Spain
| | - Giuseppe Scuderi
- Laboratory of Biotechnology, Department of Sustainable agriculture, biodiversity and food security, Euro-Mediterranean Institute of Science and Technology (IEMEST), Palermo, Italy
| | - Asier González
- Laboratory of Bacteriology, Department of Plant Pathology, Instituto Valenciano de Investigaciones Agrarias (IVIA), Moncada, Spain
| | - María M. López
- Laboratory of Bacteriology, Department of Plant Pathology, Instituto Valenciano de Investigaciones Agrarias (IVIA), Moncada, Spain
| | - Pablo Llop
- Laboratory of Bacteriology, Department of Plant Pathology, Instituto Valenciano de Investigaciones Agrarias (IVIA), Moncada, Spain
- * E-mail: ,
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Luchi N, Capretti P, Pazzagli M, Pinzani P. Powerful qPCR assays for the early detection of latent invaders: interdisciplinary approaches in clinical cancer research and plant pathology. Appl Microbiol Biotechnol 2016; 100:5189-204. [PMID: 27112348 DOI: 10.1007/s00253-016-7541-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/07/2016] [Accepted: 04/10/2016] [Indexed: 12/29/2022]
Abstract
Latent invaders represent the first step of disease before symptoms occur in the host. Based on recent findings, tumors are considered to be ecosystems in which cancer cells act as invasive species that interact with the native host cell species. Analogously, in plants latent fungal pathogens coevolve within symptomless host tissues. For these reasons, similar detection approaches can be used for an early diagnosis of the invasion process in both plants and humans to prevent or reduce the spread of the disease. Molecular tools based on the evaluation of nucleic acids have been developed for the specific, rapid, and early detection of human diseases. During the last decades, these techniques to assess and quantify the proliferation of latent invaders in host cells have been transferred from the medical field to different areas of scientific research, such as plant pathology. An improvement in molecular biology protocols (especially referring to qPCR assays) specifically designed and optimized for detection in host plants is therefore advisable. This work is a cross-disciplinary review discussing the use of a methodological approach that is employed within both medical and plant sciences. It provides an overview of the principal qPCR tools for the detection of latent invaders, focusing on comparisons between clinical cancer research and plant pathology, and recent advances in the early detection of latent invaders to improve prevention and control strategies.
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Affiliation(s)
- Nicola Luchi
- National Research Council (IPSP-CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019, Sesto Fiorentino Firenze, Italy
| | - Paolo Capretti
- National Research Council (IPSP-CNR), Institute for Sustainable Plant Protection, Via Madonna del Piano 10, 50019, Sesto Fiorentino Firenze, Italy
- Department of Agri-Food Productions and Environmental Sciences (DiSPAA), University of Florence, Piazzale delle Cascine 28, Florence, Italy
| | - Mario Pazzagli
- Department of Clinical, Experimental and Biomedical Sciences, University of Florence, Viale Pieraccini, 6, 50139, Firenze, Italy
| | - Pamela Pinzani
- Department of Clinical, Experimental and Biomedical Sciences, University of Florence, Viale Pieraccini, 6, 50139, Firenze, Italy.
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