Volume 17, Issue 7 p. 2532-2541
Research article

In situ DNA-hybridization chain reaction (HCR): a facilitated in situ HCR system for the detection of environmental microorganisms

Tsuyoshi Yamaguchi

Tsuyoshi Yamaguchi

Department of Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188 Japan

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Shuji Kawakami

Corresponding Author

Shuji Kawakami

Department of Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188 Japan

Department of Construction Systems Engineering, Anan National College of Technology, 265 Aoki Minobayashi, Anan, Tokushima, 774-0017 Japan

For correspondence. E-mail [email protected]; Tel. +81 (884) 23 7127; Fax +81 (884) 23 7127.Search for more papers by this author
Masashi Hatamoto

Masashi Hatamoto

Department of Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188 Japan

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Hiroyuki Imachi

Hiroyuki Imachi

Department of Subsurface Geobiology Analysis and Research (D-SUGAR), Japan Agency for Marine-Earth Science & Technology (JAMSTEC), Yokosuka, Kanagawa, 237-0061 Japan

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Masanobu Takahashi

Masanobu Takahashi

Department of Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188 Japan

Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi, 980-8579 Japan

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Nobuo Araki

Nobuo Araki

Department of Civil Engineering, Nagaoka National College of Technology, 888 Nishikatagai, Nagaoka, Niigata, 940-8532 Japan

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Takashi Yamaguchi

Takashi Yamaguchi

Department of Environmental Systems Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188 Japan

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Kengo Kubota

Kengo Kubota

Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aoba, Sendai, Miyagi, 980-8579 Japan

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First published: 19 December 2014
Citations: 58

Summary

In situ detection of microorganisms by fluorescence in situ hybridization (FISH) is a powerful tool for environmental microbiology, but analyses can be hampered by low rRNA content in target organisms, especially in oligotrophic environments. Here, we present a non-enzymatic, hybridization chain reaction (HCR)-based signal amplified in situ whole-cell detection technique (in situ DNA-HCR). The components of the amplification buffer were optimized to polymerize DNA amplifier probes for in situ DNA-HCR. In situ hybridization of initiator probes followed by signal amplification via HCR produced bright signals with high specificity and probe permeation into cells. The detection rates for Bacteria in a seawater sample and Archaea in anaerobic sludge samples were comparable with or greater than those obtained by catalyzed reporter deposition (CARD)-FISH or standard FISH. Detection of multiple organisms (Bacteria, Archaea and Methanosaetaceae) in an anaerobic sludge sample was achieved by simultaneous in situ DNA-HCR. In summary, in situ DNA-HCR is a simple and easy technique for detecting single microbial cells and enhancing understanding of the ecology and behaviour of environmental microorganisms in situ.