Project description:Transmission of malaria is dependent on the successful completion of the Plasmodium lifecycle in the Anopheles vector. Major obstacles are encountered in the midgut tissue, where most parasites are killed by the mosquito’s immune system. In the present study, DNA microarray analyses have been used to compare Anopheles gambiae responses to invasion of the midgut epithelium by the ookinete stage of the human pathogen Plasmodium falciparum and the rodent experimental model pathogen P. berghei. Invasion by P. berghei had a more profound impact on the mosquito transcriptome, including a variety of functional gene classes, while P. falciparum elicited a broader immune response at the gene transcript level. Ingestion of human malaria-infected blood lacking invasive ookinetes also induced a variety of immune genes, including several anti-Plasmodium factors. Keywords: Anopheles gambiae, Plasmodium falciparum, ookinete, invasion, innate immunity
Project description:Proteomic analysis of Anopheles gambiae brain tissue after in-gel trypsin digestion. To gain insights into neurobiology of the Anopheles gambiae mosquito, we carried out a proteomic analysis of its brain using a comprehensive proteomic approach.
Project description:The Anopheles gambiae midgut harbors bacteria that proliferate upon a blood feed. We used microarrays to examine the midgut gene expression response at early stages (3hours) after an artifitial meal containing heat killed bacteria. Anopheles gambiae G3 mosquitoes 5-6 day-old were fed BSA (20% in PBS with fresh 10 mM sodium bicarbonate) with or without heat killed E. coli (equivalent of 2.5 ml of 0.8 OD) . Three pools of 10 mosquito midguts were dissected after 3h and processed for microarray analysis of gene expression.
Project description:The transcriptional profile of four tissues for the multi insecticide Anopheles gambiae (Tiassale) and lab susceptible Anopheles gambiae strain N'Gousso. The malpighian tubules, abodmen integument (containing the fat body epidermal, neuronal, muscle and oenocyte cells), midgut and remaining structures were dissected and compared two ways: (i) each body part against the corresponding whole organism (ii) resistant against corresponding susceptible body parts.
Project description:We provide a broad overview of sequence diversity in An. gambiae mature microRNAs, including annotation of novel microRNAs identified in this study.
Project description:The Anopheles gambiae midgut harbors bacteria that proliferate upon a blood feed. We used microarrays to examine the midgut gene expression response at early stages (3hours) after an artifitial meal containing heat killed bacteria.
Project description:We conducted a genome wide survey of mosquito gene expression profiles in 4 different tissues of adult Anopheles gambiae mosquitoes. The tissues included the head, the midgut, the carcass (corresponding to the remainder of the mosquito after decapitation and midgut removal) and ovaries. Ovaries were collected from adult female mosquitoes, which had been bloodfed 48h prior to dissection. To investigate mosquito expression in those tissues, we performed competitive two-dye hybridizations of experimental and standard reference RNA samples to MMC1 microarrays. MMC1 microarrays contain approximately 20,000 EST clones. Standard reference RNA was produced in vitro from the spotted ESTs and was utilized to provide consistent, non-zero reference values for almost all probes of the array. For the experiment, two biological replicates, corresponding to mosquito generations 1 and 3 (generation 2 was discarded due to probable labelling errors) and one technical (dye-swap) replicate was conducted.
Project description:We characterize the epigenome of the human malaria vector Anopheles gambiae in midgut cells by mapping the distribution and levels of two post-translational histone modifications, H3K27ac and H3K27me3. These histone profiles were then correlated with levels of gene expression obtained by RNA-seq.