Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Gene expression data for worker honey bees experimentally exposed to a dual infection with Deformed wing virus and Nosema ceranae.

ABSTRACT: Bees from 3 unrelated colonies were injected with 1ul PBS extract containing 10^9 genome equivalent of Deformed wIng virus (DWV) and/or fed 10Âµl sucrose solution containing 10^5 fresh Nosema ceranae spores. Control bees were injected and fed with an equivalent DWV- and Nosema-free extract respectively). Bees were kept in cages of 21 bees (7 from each colony), and each cage was replicated 5 times per each of the 4 treatments). Bess were kept in an incubator at 30Â°C/50%RH. At day 12 p.i., bees were flash frozen in liquid nitrogen, and stored at -80Â°C. Bee abdomen RNA was sent to Christina Grozinger lab (Penn State, USA). RNA was pooled for 3 abdomens per replicate for 5 replicates per treatment. Arrays were hybridized in a dye-swap loop design.

INSTRUMENT(S): GenePix 4000B [Axon Instruments]

ORGANISM(S): Apis mellifera

SUBMITTER: Elina Nino

PROVIDER: E-MTAB-5508 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:BACKGROUND: Social insects, such as honey bees, use molecular, physiological and behavioral responses to combat pathogens and parasites. The honey bee genome contains all of the canonical insect immune response pathways, and several studies have demonstrated that pathogens can activate expression of immune effectors. Honey bees also use behavioral responses, termed social immunity, to collectively defend their hives from pathogens and parasites. These responses include hygienic behavior (where workers remove diseased brood) and allo-grooming (where workers remove ectoparasites from nestmates). We have previously demonstrated that immunostimulation causes changes in the cuticular hydrocarbon profiles of workers, which results in altered worker-worker social interactions. Thus, cuticular hydrocarbons may enable workers to identify sick nestmates, and adjust their behavior in response. Here, we test the specificity of behavioral, chemical and genomic responses to immunostimulation by challenging workers with a panel of different immune stimulants (saline, Sephadex beads and Gram-negative bacteria E. coli). RESULTS: While only bacteria-injected bees elicited altered behavioral responses from healthy nestmates compared to controls, all treatments resulted in significant changes in cuticular hydrocarbon profiles. Immunostimulation caused significant changes in expression of hundreds of genes, the majority of which have not been identified as members of the canonical immune response pathways. Furthermore, several new candidate genes that may play a role in cuticular hydrocarbon biosynthesis were identified. Finally, we identified common genes regulated by pathogen challenge in honey bees and other insects, suggesting that immune responses are conserved at the molecular level. CONCLUSIONS: These studies suggest that honey bee genomic responses to immunostimulation are substantially broader than expected, and may mediate the behavioral changes associated with social immunity by orchestrating changes in chemical signaling.

Dataset Information

Gene expression data for worker honey bees experimentally exposed to a dual infection with Deformed wing virus and Nosema ceranae.

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