Project description:We report the RNA-seq based analyses of the transcriptional changes in the Aedes aegypti midguts transcriptome 4,8,18 hours after blood feeding BSA or DENV2 NS1.
Project description:The midguts transcriptome of Aedes aegypti (Liverpool strain) females knock down AaMesh and feed AaMesh antibody versus those knock down GFP and feed pre-immune.
Project description:Rockefeller and Singapore strain Aedes aegypti female mosquitoes differ in the number of bacteria present in the midgut. Females from each strain were either maintained on 3% sucrose solution, fed a sterile blood meal, or fed a blood meal containing a cocktail of bacteria. Differential transcript abundance was compared between females from each strain/treatment combination and a common reference sample pool. The overall goal was to determine how gene expression in Rockefeller females differs from Singapore females in order to better understand why the gut microbiome differs between the strains.
Project description:We reported the RNA-seq based analyses of the transcriptional changes in the Aedes aegypti midguts knock down 3, 6days, feed antibody 18h transcriptome. Comparison of the midguts transcriptome of Aedes aegypti females at two knockdown time points and one feed condition; GFP dsRNA-3 or -6days: 3 or 6 days after 7day-old mosquitos were microinjected GFP dsRNA AaMesh dsRNA-3 or -6days: 3 or 6 days after 7day-old mosquitos were microinjected AaMesh dsRNA Pre-immune-18h: 18hrs after 7day-old wild type mosquitos were fed with Pre-immune AaMesh antibody-18h: 18hrs after 7day-old wild type mosquitos were fed with AaMesh antibody
Project description:The transcriptome of Aedes aegypti females from two strains (Chetumal and Rex-D Puerto Rico) either kept on a sugar diet or blood fed
Project description:We report here RNAseq analysis of the comparison of gene expression between sugar fed and blood fed Aedes aegypti ovaries, to understand blood meal induced changes in gene expression.
Project description:Female Aedes aegypti mosquitoes impose a severe global public health burden as primary vectors of multiple viral and parasitic pathogens. Under optimal environmental conditions, Aedes aegypti females have access to human hosts that provide blood proteins for egg development, conspecific males that provide sperm for fertilization, and freshwater that serves as an egg-laying substrate suitable for offspring survival. As global temperatures rise, Aedes aegypti females are faced with climate challenges, like intense droughts and intermittent precipitation, which create unpredictable and suboptimal conditions for the egg-laying step of their reproductive cycle. Aedes aegypti mosquitoes nonetheless show remarkable reproductive resilience, but how they achieve this is unknown. Here we show that under drought-like conditions simulated in the laboratory, mated, blood-fed Aedes aegypti females carrying mature eggs retain them in their ovaries for extended periods, while maintaining the viability of these eggs until they can be deposited in freshwater. Using transcriptomic and proteomic profiling of Aedes aegypti ovaries, we identify two previously uncharacterized genes – here named tweedledee and tweedledum – that show ovary-enriched, temporally-restricted expression during egg retention. These genes are mosquito-specific, linked within a syntenic locus, and rapidly evolving under positive selection, raising the possibility that they serve an adaptive function. Using loss-of-function mutagenesis to disrupt both genes, we show that, tweedledee and tweedledum, which encode secreted proteins, are specifically required for extended retention of viable eggs, such as during intermittent precipitation or drought. These results highlight an elegant example of taxon-restricted genes at the heart of an important adaptation that equips Aedes aegypti females with “insurance” to, when contextually appropriate, flexibly extend their reproductive sequence without losing reproductive capacity, thus allowing this species to exploit diverse and unpredictable/chaotic/changing habitats.
