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Microbiota Plays a Role in Oral Immune Priming in Tribolium castaneum

Futo M, Armitage SAO, Kurtz J – 2015

Animals are inhabited by a diverse community of microorganisms. The relevance of such microbiota is increasingly being recognized across a broad spectrum of species, ranging from sponges to primates, revealing various beneficial roles that microbes can play. The red flour beetle Tribolium castaneum represents a well-established experimental model organism for studying questions in ecology and evolution, however, the relevance of its microbial community is still largely unknown. T. castaneum larvae orally exposed to bacterial components of the entomopathogen Bacillus thuringiensis bv. tenebrionis showed increased survival upon a subsequent challenge with spores of this bacterium. To investigate whether T. castaneum microbiota plays a role in this phenomenon, we established a protocol for raising microbe-free larvae and subsequently tested whether they differ in their ability to mount such a priming response. Here we demonstrate that larvae with significantly lowered microbial loads, show decreased survival upon secondary challenge with B. thuringiensis bv. tenebrionis spores, compared to animals that were allowed to regain their microbiota before priming. Although the exact mechanism of oral immune priming is unclear, we here suggest that microbiota plays a crucial role in oral immune priming in this species.

Microbiota Plays a Role in Oral Immune Priming in Tribolium castaneum
Futo M, Armitage SAO, Kurtz J
Frontiers Research Foundation
Bacillus thuringiensis; Tribolium castaneum; immune priming; innate immunity; microbiota; oral infection
doi: 10.3389/fmicb.2015.01383
Appeared in
Frontiers in Microbiology, 6: 1383
© 2016 Futo, Armitage and Kurtz. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY).