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Meta-analysis of honey bee neurogenomic response to deformed wing virus

ABSTRACT: Meta-analysis of honey bee neurogenomic response to deformed wing virus

PROVIDER: PRJNA541333 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9020421.fastq.gz	Fastqsanger.gz
	SRR9020422.fastq.gz	Fastqsanger.gz
	SRR9020423.fastq.gz	Fastqsanger.gz
	SRR9020424.fastq.gz	Fastqsanger.gz
	SRR9020425.fastq.gz	Fastqsanger.gz

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Meta-analysis of honey bee neurogenomic response to deformed wing virus (drone)

Project description:This dataset represents RNA-Seq data that was later found to have widespread contamination with Deformed Wing virus (DWV). It has been incorporated in a meta-analysis of DWV's impact on brain gene expression

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Meta-analysis of honey bee neurogenomic response to deformed wing virus (worker)

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Meta-analysis of honey bee neurogenomic response to deformed wing virus

Project description:Plant pollination by the western honey bee Apis mellifera is an irreplaceable agroecological and economic cornerstone currently under threat. Recent colony loss has been consistently linked to the increased prevalence of deformed wing virus (DWV), an Iflavirus transmitted from the ecoparasitic mite Varros destructor. While DWV has been detected in the honey bee brain and causally linked to behavioral impairment, the molecular impact of infection on brain gene expression is largely unknown. Recently, we discovered that two published and two new brain transcriptomic studies conducted in our lab contained DWV contamination in over 99% of sequenced honey bee samples. This unanticipated finding sharply contrasted with the experimental paradigms of these four studies, as no physical or behavioral signs of DWV were detected in any of the 335 individual honey bees sampled. We took this opportunity to perform a meta-analysis and test the hypothesis that DWV influences brain gene expression, a relationship which could be linked to the massive depopulation events observed around the world. Results from our study support commonalities in the molecular consequences of DWV in the honey bee brain and implicate specific genes and biological processes associated with infection. Next, we used single-cell RNA-Sequencing to implicate glia as active responders to viral infection. Finally, we performed viral gene expression analysis on a subset of samples and found DWV type A as well as a previously unreported A-B recombinant in the brain. We present this meta-analysis as a first step toward addressing a potential missing link between viral infection and behavior in honey bees.

2020-02-04 | GSE130785 | GEO

Meta-analysis of honey bee neurogenomic response to deformed wing virus (drone)

Project description:Meta-analysis of honey bee neurogenomic response to deformed wing virus (drone)

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Meta-analysis of honey bee neurogenomic response to deformed wing virus (worker)

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Meta-analysis of honey bee neurogenomic response links Deformed wing virus type A to precocious behavioral maturation.

Project description:Crop pollination by the western honey bee Apis mellifera is vital to agriculture but threatened by alarmingly high levels of colony mortality, especially in Europe and North America. Colony loss is due, in part, to the high viral loads of Deformed wing virus (DWV), transmitted by the ectoparasitic mite Varroa destructor, especially throughout the overwintering period of a honey bee colony. Covert DWV infection is commonplace and has been causally linked to precocious foraging, which itself has been linked to colony loss. Taking advantage of four brain transcriptome studies that unexpectedly revealed evidence of covert DWV-A infection, we set out to explore whether this effect is due to DWV-A mimicking naturally occurring changes in brain gene expression that are associated with behavioral maturation. Consistent with this hypothesis, we found that brain gene expression profiles of DWV-A infected bees resembled those of foragers, even in individuals that were much younger than typical foragers. In addition, brain transcriptional regulatory network analysis revealed a positive association between DWV-A infection and transcription factors previously associated with honey bee foraging behavior. Surprisingly, single-cell RNA-Sequencing implicated glia, not neurons, in this effect; there are relatively few glial cells in the insect brain and they are rarely associated with behavioral plasticity. Covert DWV-A infection also has been linked to impaired learning, which together with precocious foraging can lead to increased occurrence of infected bees from one colony mistakenly entering another colony, especially under crowded modern apiary conditions. These findings provide new insights into the mechanisms by which DWV-A affects honey bee health and colony survival.

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