Bioscience of Microbiota, Food and Health
Online ISSN : 2186-3342
ISSN-L : 2186-3342
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Toll-like receptor homolog TOL-1 regulates Bifidobacterium infantis-elicited longevity and behavior in Caenorhabditis elegans
Simo SUNYasuko MIZUNOTomomi KOMURAYoshikazu NISHIKAWAEriko KAGE-NAKADAI
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2019 Volume 38 Issue 3 Pages 105-110

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Abstract

Bifidobacterium infantis, a Gram-positive bacterium, is one of the commonly used probiotics. We previously showed that B. infantis modified host defense systems and extended the lifespan of the nematode Caenorhabditis elegans. In the present study, we showed that the lifespan extension caused by B. infantis was enhanced in animals having a mutation in the tol-1 gene that encodes the sole C. elegans homolog of Toll-like receptors (TLRs). Meanwhile, lifespan increased by other probiotic bacteria, such as Bacillus subtilis or Clostridium butyricum, was not affected in the tol-1 mutant animals. A microarray analysis revealed that the expression of innate immune response-related genes was significantly increased in the tol-1 mutant. Worms with the tol-1 mutation exhibited reduced leaving behavior from the B. infantis lawn, while canonical downstream factors trf-1/TRAF and ikb-1/IκB appeared to not be involved. In conclusion, C. elegans tol-1/TLR regulates B. infantis-induced longevity and also regulates behavior against B. infantis.

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© 2019 by BMFH Press

This article is licensed under a Creative Commons [Attribution-NonCommercial-NoDerivatives 4.0 International] license.
https://creativecommons.org/licenses/by-nc-nd/4.0/
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