Chemosensation of bacterial secondary metabolites modulates neuroendocrine signaling and behavior of C. elegans.

Chemosensation of bacterial secondary metabolites modulates neuroendocrine signaling and behavior of C. elegans.
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DOI:
10.1016/j.cell.2014.09.011
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发表时间:
2014-10-09
期刊:
影响因子:
64.5
通讯作者:
Kim DH
Kim DH
中科院分区:
生物学1区
文献类型:
--
作者:
Meisel JD;Panda O;Mahanti P;Schroeder FC;Kim DH

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Discrimination among pathogenic and beneficial microbes is essential for host organism immunity and homeostasis. Here, we show that chemosensory detection of two secondary metabolites produced by Pseudomonas aeruginosa modulates a neuroendocrine signaling pathway that promotes avoidance behavior in the simple animal host Caenorhabditis elegans. Secondary metabolites phenazine-1-carboxamide and pyochelin activate a G protein-signaling pathway in the ASJ chemosensory neuron pair that induces expression of the neuromodulator DAF-7/TGF-β. DAF-7, in turn, activates a canonical TGF-β signaling pathway in adjacent interneurons to modulate aerotaxis behavior and promote avoidance of pathogenic P. aeruginosa. Our data provide a chemical, genetic, and neuronal basis for how the behavior and physiology of a simple animal host can be modified by the microbial environment, and suggest that secondary metabolites produced by microbes may provide environmental cues that contribute to pathogen recognition and host survival.
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