6533b7d3fe1ef96bd1260022

RESEARCH PRODUCT

Tribolium castaneum Apolipophorin-III acts as an immune response protein against Bacillus thuringiensis Cry3Ba toxic activity

M. Dolores RealCarolina RausellEstefanía Contreras

subject

Insecticidesanimal structuresBacillus thuringiensisBiologyMicrobiologyHemolysin ProteinsImmune systemBacterial ProteinsRNA interferenceImmunityBacillus thuringiensisToxicity TestsBotanyAnimalsEcology Evolution Behavior and SystematicsTriboliumGene knockdownBacillus thuringiensis ToxinsfungiProphenoloxidasebiology.organism_classificationImmunity InnateEndotoxinsApolipoproteinsCry1AcLarvaRNA InterferenceApolipophorin III

description

In this study, a 2.1-fold Apolipophorin-III mRNA up-regulation was found in Tribolium castaneum larvae challenged with Bacillus thuringiensis Cry3Ba spore-crystal mixture. Knockdown of Apolipophorin-III by RNAi resulted in increased T. castaneum larvae susceptibility following Cry3Ba spore-crystal treatment, demonstrating Apolipophorin-III involvement in insect defense against B. thuringiensis. We showed that Apolipophorin-III participates in T. castaneum immune response to B. thuringiensis activating the prophenoloxidase cascade since: (i) phenoloxidase activity significantly increased after Cry3Ba spore-crystal treatment compared to untreated or Cry1Ac spore-crystal treated larvae and (ii) phenoloxidase activity in Cry3Ba spore-crystal treated Apolipophorin-III silenced larvae was 71±14% lower than that of non-silenced intoxicated larvae.

yearjournalcountryeditionlanguage
2013-07-01Journal of Invertebrate Pathology
https://doi.org/10.1016/j.jip.2013.04.002