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Trotter M, Borst N, Thewes R, von Stetten F. Review: Electrochemical DNA sensing – Principles, commercial systems, and applications. Biosens Bioelectron 2020; 154:112069. [DOI: 10.1016/j.bios.2020.112069] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/28/2020] [Accepted: 02/01/2020] [Indexed: 02/06/2023]
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Preliminary evaluation for a novel voltammetric analysis of targeted nucleic acid by combining electrochemical DNA chip and digital loop-mediated isothermal amplification. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.11.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hashimoto K, Inada M, Ito K. A novel voltammetric approach for real-time electrochemical detection of targeted nucleic acid sequences using LAMP. Anal Biochem 2017; 539:113-117. [DOI: 10.1016/j.ab.2017.10.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 10/18/2017] [Accepted: 10/22/2017] [Indexed: 11/29/2022]
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Kawai K, Inada M, Ito K, Hashimoto K, Nikaido M, Hata E, Katsuda K, Kiku Y, Tagawa Y, Hayashi T. Detection of bovine mastitis pathogens by loop-mediated isothermal amplification and an electrochemical DNA chip. J Vet Med Sci 2017; 79:1973-1977. [PMID: 29093278 PMCID: PMC5745174 DOI: 10.1292/jvms.17-0263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Bovine mastitis causes significant economic losses in the dairy industry. Effective prevention of bovine mastitis requires an understanding of the infection status of a pathogenic microorganism in a herd that has not yet shown clinical signs of mastitis and appropriate treatment specific for the pathogenic microorganism. However, bacterial identification by culture has drawbacks in that the sensitivity may be low and the procedure can be complex. In this study, we developed a genetic detection method to identify mastitis pathogens using a simple and highly sensitive electrochemical DNA chip which can specifically detect bacterial DNA in milk specimens. First, we selected microorganisms belonging to 12 families and/or genera associated with mastitis for which testing should be performed. Next, we optimized the conditions for amplifying microorganism DNA by loop-mediated isothermal amplification (LAMP) using 32 primers and the use of a DNA chip capable of measuring all pathogens simultaneously. Sample detection could be completed in just a few hours using this method. Comparison of the results obtained with our DNA chip method and those obtained by bacterial culture verified that when the culture method was set to 100%, the total positive concordance rate of the DNA chip was 85.0% and the total negative concordance rate was 86.9%. Furthermore, the proposed method allows both rapid and highly sensitive detection of mastitis pathogens. We believe that this method will contribute to the development of an effective mastitis control program.
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Affiliation(s)
- Kazuhiro Kawai
- School of Veterinary Medicine, Azabu University, Sagamihara, Kanagawa 252-5201, Japan
| | - Mika Inada
- Toshiba Corporation, Kawasaki, Kanagawa 212-8582, Japan
| | - Keiko Ito
- Toshiba Corporation, Kawasaki, Kanagawa 212-8582, Japan
| | | | | | - Eiji Hata
- National Institute of Animal Health, National Agriculture and Food Research Organization, Sapporo, Hokkaido 062-0045, Japan
| | - Ken Katsuda
- National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-0856, Japan
| | - Yoshio Kiku
- National Institute of Animal Health, National Agriculture and Food Research Organization, Sapporo, Hokkaido 062-0045, Japan
| | - Yuichi Tagawa
- National Institute of Animal Health, National Agriculture and Food Research Organization, Tsukuba, Ibaraki 305-0856, Japan
| | - Tomohito Hayashi
- National Institute of Animal Health, National Agriculture and Food Research Organization, Sapporo, Hokkaido 062-0045, Japan
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Unno H, Inada M, Nakamura A, Hashimoto M, Ito K, Hashimoto K, Nikaido M, Hayashi T, Hata E, Katsuda K, Kiku Y, Tagawa Y, Kawai K. Improved rapid and efficient method for Staphylococcus aureus DNA extraction from milk for identification of mastitis pathogens. J Vet Med Sci 2015; 77:1007-9. [PMID: 25843742 PMCID: PMC4565803 DOI: 10.1292/jvms.14-0159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
A rapid and efficient DNA extraction method was developed for detecting mastitis pathogens in milk. The first critical step involved cell wall disruption by bead-beating, as physical disruption using beads was more effective for DNA extraction from Gram-positive bacteria, such as Staphylococcus aureus, than enzymatic disruption using proteinase K. The second critical step involves the use of acetic acid and ammonium sulfate in the purification process, as these reagents effectively and efficiently remove the lipids and proteins in milk. Using these methods, DNA suitable for loop-mediated isothermal amplification was obtained within 30 min. Also, the rapid and sensitive detection of S. aureus in milk was possible at levels as low as 200 cfu/ml.
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Affiliation(s)
- Hirotaka Unno
- Toshiba Corporation, 1, Komukai-Toshiba-cho, Saiwai-ku, Kawasaki, Kanagawa 212-8582, Japan
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