Mosquitoes
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ABSTRACT:
PROVIDER: PRJNA505498 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:This microarray study aimed at evaluating the impact of mosquito chemical environment on the selection of insecticide resistance mechanisms. Here the mosquito Aedes aegypti was used as a model to perform a laboratory experiment combining mosquito larvae exposure to a sub-lethal dose of xenobiotic and their selection with the insecticide permethrin. After ten generations, bioassays and a transcriptome profiling with the 15K microarray Aedes detox chip plus microarray were performed comparatively on all strains.
2012-03-31 | E-MTAB-632 | biostudies-arrayexpress
Project description:Malaria mosquitoes acoustically detect their mating partners within large swarms that form transiently at dusk. Indeed, male malaria mosquitoes preferably respond to female flight tones during swarm time. This phenomenon implies a sophisticated context- and time-dependent modulation of mosquito audition, the mechanisms of which are largely unknown. Using transcriptomics, we identify a complex network of candidate neuromodulators regulating mosquito hearing in the species Anopheles gambiae. Among them, octopamine stands out as auditory modulator during swarm time. In-depth analysis of octopamine auditory function shows that it affects the mosquito ear on multiple levels: it modulates the tuning and stiffness of the flagellar sound receiver and controls the erection of antennal fibrillae. We show that two α- and β-adrenergic-like octopamine receptors drive octopamine’s auditory roles and demonstrate that the octopaminergic auditory control system can be targeted by insecticides. Our findings highlight octopamine as key for mosquito hearing and mating partner detection, and as a potential novel target for mosquito control.
2023-07-05 | GSE235286 | GEO
Project description:We compare the transcriptome of gnotobiotic Ae. aegypti generated by contaminating axenic (bacteria-free) larvae with bacterial isolates found in natural mosquito breeding sites. We focused on four bacterial isolates (Lysobacter, Flavobacterium, Paenibacillus and Enterobacteriaceae) and found that different gnotobiotic treatments resulted in massive transcriptomic changes throughout the mosquito development.
2021-12-15 | GSE173472 | GEO
Project description:Background. Aedes aegypti is arguably the most studied of all mosquito species in the laboratory and is the primary vector of both Dengue and Yellow Fever flaviviruses in the field. A large number of transcriptional studies have been made in the species and these usually report transcript quantities observed at a certain age or stage of development. However, circadian oscillation is an important characteristic of gene expression in many animals and plants, modulating both their physiology and behavior. Circadian gene expression in mosquito species has been previously reported but for only a few genes directly involved in the function of the molecular clock. Results. Herein we analyze the transcription profiles of 21,494 messenger RNAs using an Ae. aegypti Agilent® microarray. Transcripts were quantified in adult female heads at 24 hours and then again at 72 hours and eight subsequent time points spaced four hours apart. We document circadian rhythms in multiple molecular pathways essential for growth, development, immune response, detoxification/pesticide resistance. Circadian rhythms were also noted in ribosomal protein genes used for normalization in reverse transcribed PCR (RT-PCR) to determine transcript abundance. We report pervasive oscillations and intricate synchronization patterns relevant to all known biological pathways. Conclusion. These results argue strongly that transcriptional analyses either need to be made over time periods rather than confining analyses to a single time point or development stage or exceptional care needs to be made to synchronize all mosquitoes to be analyzed and compared among treatment groups.
2011-03-17 | GSE28010 | GEO
Project description:A deeper understanding of malaria parasite development inside the Anopheles mosquito may lead to the identification of processes that can be targeted by transmission-blocking interventions. Paraquat (1,1'-dimethyl-4,4'-bipyridylium dichloride) is a potent superoxide-inducing agent that impacts Plasmodium ookinete development, especially at higher concentrations. Compounds like Paraquat can potentially induce an oxidative imbalance in the mosquito midgut during ookinete maturation, essentially super-stressing the parasite leading to the arrested development of ookinetes, the only stage that can invade through a mosquito midgut cell to establish an oocyst infection in the mosquito. The mosquito midgut has evolved to handle the natural production of reactive oxygen and nitrogen species (ROS and RNS, respectively) as a result of feeding on blood. The addition of Paraquat to a bloodmeal is expected to induce a cognate response in the midgut to handle the excess ROS/RNS, and high concentrations of this compound can potentially overwhelm the midgut response leading to mosquito death. While several studies have explored the effect of Paraquat on malaria parasites, a fundamental understanding of the mosquito response to this compound remains unknown. Here, we quantified the mosquito midgut proteomic response to a Paraquat-laced sugar meal to understand the intrinsic midgut response (in the absence of a bloodmeal). We then carried out transcriptomic analysis of the mosquito midgut for several antioxidants of the Trx and GSH pathways to compare concordance or discordance between protein and its transcripts during different oxidative stress conditions. Finally, we determined whether the same Trx and GSH pathways are upregulated following infection with either P. falciparum or P. berghei at 24 hrs post-blood feeding, coinciding with the time point for maximal ookinete traversal of the midgut. We discuss the potential selective action of Paraquat on the parasite and the intrinsic tolerance of the mosquito midgut to Paraquat-mediated oxidative stress.
2022-03-01 | PXD008231 | Pride
Project description:Aedes aegypti, the principle global vector of arboviral diseases, has been widely regarded to only lay eggs and undergo preimaginal development in fresh water collections. Recent observations however show that it has adapted to develop in anthropogenic brackish water habitats of up to 50% sea water in coastal areas in different continents. This adaptation is characterised by greater salinity tolerance in adult oviposition preference, larvae and changes in sizes of anal papillae. The physiological basis for salinity tolerance in either Ae. aegypti or any of the known salinity-tolerant species of Anopheles malaria vectors is not established. To address this knowledge gap which is of fundamental biological interest and important for control of major diseases we performed RNAseq analysis of gut, anal papillae, and rest of the carcass of Ae. aegypti collected in the field from brackish water (BW) and fresh water habitats (FW) and then maintained as laboratory colonies in BW and FW respectively. We also examined the cuticle structure of larvae, pupae and adult BW and FW Ae. aegypti by microscopy and performed proteomic analysis of the shed cuticles of fourth instar larvae (L4) when they transformed into pupae. The results show that major changes in cuticle structure and composition characterize, and may be the principal factor that permits, the adaptation of Ae. aegypti to brackish water.
2021-04-07 | PXD018397 | Pride
Project description:In the present study, we have investigated the effect of CpG Oligodeoxynucleotides (CpG-ODN) on the outcome of Plasmodium infection of the mosquito vectors Anopheles stephensi and Anopheles gambiae and on the modulation of mosquito immunity to Plasmodium. Anopheles mosquitoes inoculated with CpG-ODN showed significant reduction of Plasmodium infection rate and intensity. Microarrays were used to profile transcription of fat-body from CpG-ODN-treated mosquitoes. Mosquitoes were dissected 18h after ODN inoculation (immediately before feeding). Batches of 20 to 30 fat bodies (abdomen without midgut, ovaries and malpighian tubule]) were dissected in cold DEPC-treated phosphate-buffered saline (PBS) and processed for RNA preparation. Mosquitoes treated with CpG-ODNs are less susceptible to Plasmodium infection. Transcription profile of fat body indicates that protection was associated with coagulation/wound healing, while melanization appears to be depressed.
2013-04-02 | GSE26941 | GEO
Project description:16S Metagenomics of mosquito abdomens
| PRJEB32570 | ENA
Project description:We report that the mosquito small RNA expression level in mosquitoes following a sugar meal
2022-05-01 | GSE180776 | GEO
Project description:Transcriptional responses in the gut of the main malaria vector Anopheles gambiae following oral bacterial infection with the entomopathogen Serratia marcescens were identified using DNA microarrays. S. marcescens is a common member of the mosquito gut microbiota, found in both laboratory reared and field collected mosquitoes, that can be potentially pathogenic as in Drosophila (Nehme et al., 2007), while it has been shown to influence the outcome of Plasmodium infections (Bando et al., 2013). S. marcescens belongs to the Enterobacteriaceae family, members of which have been shown to influence malaria transmission dynamics (Cirimotich et al., 2011, Boissiere et al., 2012). To further investigate the interactions between S. marcescens and the mosquito host, likely to shape, directly or indirectly, malaria transmission dynamics, An. gambiae mosquitoes, from the recently established N'gousso M form laboratory colony that retains much of the genetic variation of field mosquitoes, were antibiotic treated for 5 days and subsequently orally infected with the Db11-GFP strain of S. marcescens. Bacteria-fed mosquitoes were selected 2 days post infection, and, 3 days post infection, guts from bacteria-fed mosquitoes were dissected. Uninfected control mosquitoes were treated in the same way. Differential expression in the gut of S. marcescens infected mosquitoes, compared to uninfected controls, was identified by hybridizing labelled complementary RNA, derived from total RNA extracted from the respective gut pools, in customized Agilent 4x44k gene expression microarrays, comprising oligonucleotide probes encompassing all An. gambiae annotated genes of the AgamP3.6 release, with each probe represented in duplicate.
2013-11-30 | E-MEXP-3952 | biostudies-arrayexpress