Sporozoites, the invasive form of malaria parasites transmitted by mosquitoes, are quiescent while in the insect salivary glands. Sporozoites only differentiate inside of the hepatocytes of the mammalian host. We show that sporozoite latency is an active process controlled by a eukaryotic initiation factor-2alpha (eIF2alpha) kinase (IK2) and a phosphatase. IK2 activity is dominant in salivary gland sporozoites, leading to an inhibition of translation and accumulation of stalled mRNAs into granul ...[more]
Project description:Transcriptional profiling of gametocyte non-producer lines in Plasmodium berghei Transcriptome of gametocyte non producer lines (natural and genetic KO) and parental (820) lines. The aim of the study was to identify key genes involved in the decision to commit to gametocytogenesis in Plasmodium berghei. These microarrays compare naturally selected lines that do not produce gametocytes, and the parental line and additionally a genetic knock out of AP2-G PBANKA_143750. Data published Sinha, Hughes, et, al Nature tbc. 2- colour microarray comparing to common background pool (containing all life cycle stages). Replicates of different life cycle stages of gametocyte non-producer lines and wild tye (WT) parental control lines
Project description:The purpose of this research is to identify and evaluate the global gene expression of the rodent malaria parasites Plasmodium yoelii, Plasmodium berghei and Plasmodium chabaudi blood-stage parasites and specifically compare the blood stage gene expression profiles of samples derived from previous studies on Plasmodium falciparum, Plasmodium vivax and Plasmodium knowlesi Overall design: Mice were infected by intraperitoneal injections of P. berghei ANKA, P. chabaudi AS or P. yoelii 17x parasitized erythrocytes and parasitaemia and parasite stages were monitored by thin blood smears stained with Giemsa. Mice infected with P. chabaudi were highly synchronized and terminal bled every 2 hours under anesthesia over the course of 24 hr. For P. berghei and P. yoelii infection, mice were terminal bleed and the stage-specific parasitized erythrocytes were separated via Nycodenz density gradient. The ring stage interface was isolated, washed and subjected to ex vivo culture, which was then collected every 2 hr over the course of 24 hr over a complete IDC life-cycle. Samples labeled with Cy5 were hybridized against a reference RNA pool labeled with Cy3, consisting of equal amounts of P. yoelii or P. berghei or P. chabaudi RNA from each time point.
Project description:mRNA Transcripts expression profile of Plasmodium berghei infected host HepG2 cells with and without SUMO1 over expression. To check the changes in the transcript profiles upon SUMO1 over expression which is responsible for Plasmodium berghei parasite's growth arrest in host HepG2 cells. Agilent one-color experiment, Organism: Homo sapiens, Custom Agilent 8x60k Human Whole Genome Microarray Gene expression (AMADID: 039494), Labeling kit: Agilent Quick-Amp labeling Kit (p/n5190-0442).