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1-Undecene from Pseudomonas aeruginosa is an olfactory signal for flight-or-fight response in Caenorhabditis elegans

Prakash, D and Akhil, MS and Radhika, B and Venkatesan, R and Chalasani, SH and Singh, V (2021) 1-Undecene from Pseudomonas aeruginosa is an olfactory signal for flight-or-fight response in Caenorhabditis elegans. In: EMBO Journal, 40 (13).

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Official URL: https://doi.org/10.15252/embj.2020106938


Animals possess conserved mechanisms to detect pathogens and to improve survival in their presence by altering their own behavior and physiology. Here, we utilize Caenorhabditis elegans as a model host to ask whether bacterial volatiles constitute microbe-associated molecular patterns. Using gas chromatography�mass spectrometry, we identify six prominent volatiles released by the bacterium Pseudomonas aeruginosa. We show that a specific volatile, 1-undecene, activates nematode odor sensory neurons inducing both flight and fight responses in worms. Using behavioral assays, we show that worms are repelled by 1-undecene and that this aversion response is driven by the detection of this volatile through AWB odor sensory neurons. Furthermore, we find that 1-undecene odor can induce immune effectors specific to P. aeruginosa via AWB neurons and that brief pre-exposure of worms to the odor enhances their survival upon subsequent bacterial infection. These results show that 1-undecene derived from P. aeruginosa serves as a pathogen-associated molecular pattern for the induction of protective responses in C. elegans. © 2021 The Authors. Published under the terms of the CC BY 4.0 license

Item Type: Journal Article
Publication: EMBO Journal
Publisher: John Wiley and Sons Inc
Additional Information: The copyright for this article belongs to Authors
Department/Centre: Division of Biological Sciences > Molecular Reproduction, Development & Genetics
Date Deposited: 18 Aug 2021 11:01
Last Modified: 18 Aug 2021 11:01
URI: http://eprints.iisc.ac.in/id/eprint/69273

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