Anopheles dirus
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA564461 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR10149832_1.fastq.gz | Fastqsanger.gz | |||
| SRR10149832_2.fastq.gz | Fastqsanger.gz | |||
| SRR10149833_1.fastq.gz | Fastqsanger.gz | |||
| SRR10149833_2.fastq.gz | Fastqsanger.gz | |||
| SRR10149834_1.fastq.gz | Fastqsanger.gz |
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Project description:Transcriptome analysis of Anopheles dirus and Plasmodium vivax at oocyst stages at day 7
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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
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Project description:Colonization of the mosquito host by Plasmodium parasites is achieved by sexually differentiated gametocytes. Gametocytogenesis, gamete formation and fertilization are tightly regulated processes, and translational repression is a major regulatory mechanism for stage conversion. Here, we present a characterization of a Plasmodium berghei RNA binding protein, UIS12, that contains two conserved eukaryotic RNA recognition motifs (RRM). Targeted gene deletion results in viable parasites that replicate normally during blood infection, but form fewer gametocytes. Upon transmission to Anopheles stephensi mosquitoes, both numbers and size of midgut-associated oocysts are impaired. As a consequence, no salivary gland sporozoites are formed indicative of a complete life cycle arrest in the mosquito vector. Comparative transcript profiling in mutant and wild-type infected red blood cells revealed downregulation of mRNAs coding for signature gamete-, ookinete- and oocyst-specific proteins in uis12(-) parasites. Together, our findings indicate multiple roles for UIS12 in regulation of gene expression after blood infection in good agreement with the pleiotropic defects that terminate successful sporogony and onward transmission to a new vertebrate host.
2021-03-05 | GSE152686 | GEO
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. By comparing gene expression patterns between carcassess or guts of mosquitoes that fed on a P. falciparum or P. berghei wt and mosquitoes that fed on invasion incapable strains we gain information on the A. gambiae transcriptional responses to the invading ookinete at 24 hours after feeding. By comparing gene expression patterns between carcassess or guts of mosquitoes that fed on a P. falciparum ookinete invasion incapable strain and mosquitoes that fed on non-infected blood we gain information on the A. gambiae transcriptional responses to malaria infected blood in absence of ookinete invasion at 24 hours after feeding. By comparing gene expression patterns between mosquitoes at 4 hours after being injected with either E. coli or S. aureus and mosquitoes injected with sterile PBS we gain information on the mosquito's transcriptional response to these bacterial challenges.
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