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Honeybee (Apis mellifera) infected stage with Deformed Wing Virus and Sacbrood Virus.

ABSTRACT: Gene expression changes in the artificially reared honeybee (Apis mellifera) pupae orally infected at larval stage with RNA viruses, Deformed Wing Virus and Sacbrood Virus.

PROVIDER: PRJEB6511 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR528750.fastq.gz	Fastqsanger.gz
	ERR528751.fastq.gz	Fastqsanger.gz
	ERR528752.fastq.gz	Fastqsanger.gz
	ERR528753.fastq.gz	Fastqsanger.gz
	ERR528754.fastq.gz	Fastqsanger.gz

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Diversity of populations of Deformed wing virus in the honeybee (Apis mellifera) pupae overtly infected by injection of DWV virus preparations from overtly and covertly infected honeybees to haemolymph.

Project description:Experiment was designed (i) to analyse the strain composition of Deformed wing virus (DWV) populations in covertly and overtly infected honeybees (Apis mellifera) from Varroa-free and Varroa-infested colonies, and (ii) to determine abundance of the DWV strains following direct injection of the DWV preparations from covertly and overtly infected bees to the bee pupae haemolymph in the absence of Varroa destructor mites. Experiment included isolation of DWV preparations from the following bees: covertly-infected bees from Varroa-free colony, covertly infected bees exposed orally to the Varroa-selected DWV strains, and the overtly infected Varroa-exposed bees. Honeybee pupae were experimentally injected with those DWV preparations and sampled 4 days post injection following development of overt DWV infection. A series of the DWV cDNA fragment covering complete DWV genomic RNA sequences were amplified by RT-PCR using RNA extracted from virus preparations and the injected pupae. The cDNA preparations were sequenced using next generation(Illumina HighSeq 2000) paired-end sequencing to obtain data on the DWV strain composition.

2013-09-01 | E-MTAB-1675 | biostudies-arrayexpress

Effect of Deformed wing virus (DWV) and Varroa destructor (mite) on gene expression in honeybee (Apis mellifra) pupae

Project description:Experiment was designed to study the effect of Deformed wing virus (DWV) and the mite Varroa destructor on global gene expression using microarray transcriptional profiling in developing worker honeybee (Apis mellifera). Newly hatched bee larvae (day 3 of bee development) were transferred from a Varroa-free colony with low DWV levels to a Varroa-infested colony with high levels of DWV in bees and Varroa mites. All transferred larvae were receiving the DWV strains present in this Varroa-infested colony with the food delivered by the nurse bees until their capping (day 8). About half of these larvae were capped with Varroa mite and were subjected to the mite piercing and feeding on their haemolymph during pupal development until sampling at purple eye stage (day 14). Exposure to the mite piercing and feeding resulted in about 1000-fold increase of the DWV levels in the majority of the mite-exposed pupae compared to the control pupae and the pupae not exposed to Varroa mites.

2013-06-01 | E-MTAB-1285 | biostudies-arrayexpress

Effects of Deformed wing virus infection and the mite Varroa destructor on siRNA and miRNA composition in the honeybee (Apis mellifera)

Project description:Experiment was designed to study the effect of Deformed wing virus (DWV) and the mite Varroa destructor on on siRNA and miRNA composition using high-throughput sequencing of small RNA in developing worker honeybee (Apis mellifera). Newly hatched bee larvae (day 3 of bee development) were transferred from a Varroa-free colony with low DWV levels to a Varroa-infested colony with high levels of DWV in bees and Varroa mites. All transferred larvae were receiving the DWV strains present in this Varroa-infested colony with the food delivered by the nurse bees until their capping (day 8). About half of these larvae were capped with Varroa mite and were subjected to the mite piercing and feeding on their haemolymph during pupal development until sampling at purple eye stage (day 14). Exposure to the mite piercing and feeding resulted in about 1000-fold increase of the DWV levels in the majority of the mite-exposed pupae compared to the control pupae and the pupae not exposed to Varroa mites.

2013-09-01 | E-MTAB-1671 | biostudies-arrayexpress

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

2020-02-04 | GSE130702 | GEO

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

2020-02-04 | GSE130700 | GEO

Deformed wing virus strain:MEX16

Project description:Deformed wing virus strain:MEX16 Genome sequencing and assembly

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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

Do the honeybee pathogens Nosema ceranae and deformed wing virus act synergistically?

Project description:The honeybee pathogens Nosema ceranae and deformed wing virus (DWV) cause the collapse of honeybee colonies. Therefore, it is plausible that these two pathogens act synergistically to increase colony losses, since N.ceranae causes damage to the mid-gut epithelial ventricular cells and actively suppresses the honeybees' immune response, either of which could increase the virulence of viral pathogens within the bee. To test this hypothesis we exploited 322 Hawaiian honeybee colonies for which DWV prevalence and load is known. We determined via PCR that N.ceranae was present in 89-95% of these colonies, with no Nosema apis being detected. We found no significant difference in spore counts in colonies infected with DWV and those in which DWV was not detected, either on any of the four islands or across the entire honeybee population. Furthermore, no significant correlation between DWV loads (?CT levels) and N.ceranae spore counts was found, so these two pathogens are not acting synergistically. Although the Hawaiian honeybees have the highest known prevalence of N.ceranae in the world, with average number of spores been 2.7 million per bee, no acute Nosema related problems i.e. large-scale colony deaths, have been reported by Hawaiian beekeepers.

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Gene expression profile of experimentally Deformed wing virus (DWV)-infected honey bees: Naive control vs. DWV-infected pupae

Project description:Transcriptional profiling of honey bee pupae challenging a DWV infection by comparing the gene expression profiles of untreated honey bee pupae with DWV-infected pupae. Goal was to determine the gene expression profile of DWV-infected honey bee pupae.

2016-11-15 | E-MTAB-5070 | biostudies-arrayexpress

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

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

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