Entamoeba invadens encystation transcriptome
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ABSTRACT:
ORGANISM(S): Entamoeba invadens
PROVIDER: GSE33312 | GEO | 2011/10/29
SECONDARY ACCESSION(S): PRJNA149321
REPOSITORIES: GEO
Similar Datasets
Project description:In this study, we used microarray analysis to determine genes involved in encystation. The expression profile more than 9,700 genes during encystation was compared.
2011-10-28 | E-GEOD-33312 | biostudies-arrayexpress
Project description:Entamoeba invadens encystation transcriptome
| PRJNA149321 | ENA
Project description:Encystation is an essential differentiation process for the completion of the life cycle of a group of intestinal protozoa including Entamoeba histolytica, the causative agent of intestinal and extraintestinal amebiasis. However, regulation of gene expression during encystation is poorly understood. To comprehensively understand the process at the molecular level, the transcriptomic profiles of E. invadens, which is a related reptilian species that causes an invasive disease similar to that of E. histolytica, was investigated during encystation. Using a custom-generated Affymetrix platform microarray, we performed time course (0.5, 2, 8, 24, 48, and 120 h) gene expression analysis of encysting E. invadens. ANOVA analysis revealed that a total of 1,528 genes showed ?3 fold up-regulation at one or more time points, relative to the trophozoite stage. Of these modulated genes, 8% (116 genes) were up-regulated at the early time points (0.5, 2 and 8h), while 63% (962 genes) were up-regulated at the later time points (24, 48, and 120 h). Twenty nine percent (450 genes) are either up-regulated at 2 to 5 time points or constitutively up-regulated in both early and late stages. Among the up-regulated genes are the genes encoding transporters, cytoskeletal proteins, proteins involved in vesicular trafficking (small GTPases), Myb transcription factors, cysteine proteases, components of the proteasome, and enzymes for chitin biosynthesis. This study represents the first kinetic analysis of gene expression during differentiation from the invasive trophozoite to the dormant, infective cyst stage in Entamoeba. Functional analysis on individual genes and their encoded products that are modulated during encystation may lead to the discovery of targets for the development of new chemotherapeutics that interfere with stage conversion of the parasite.
| S-EPMC3770568 | biostudies-literature
Project description:RNA-seq was performed on encysting and excysting E. invadens, a parasite of reptiles that is used as a model system to study stage conversion in Entamoeba species, including the human pathogen E. histolytica. The goal of the project was to identify changes to the transcriptome during development, in order to better understand the mechanisms of development. RNA was isolated from trophozoites, from encysting parasites (at 8, 24, 48 and 72 hours after transfer to encystation media) and from excysting parasites (2 and 8 hours after induction of excystation), converted to cDNA, and sequenced on a SOLiD platform. RNA-seq data was used to refine gene models, find potential unannotated genes, and identify genes that are developmentally regulated.
2013-06-28 | E-GEOD-45132 | biostudies-arrayexpress
Project description:The developmental life cycle of the enteric parasite Entamoeba invadens: transcriptome analysis reveals a crucial role for phospholipase D in stage conversion
| PRJNA192970 | ENA
Project description:Small RNAs during E. invadens stage conversion
| PRJNA279351 | ENA
Project description:Previously, we have shown that in Entamoeba histolytica, methionine γ-lyase (EhMGL) downregulation results in trifluoromethionine resistance. The transcriptional response, however, of this parasite to the drug is not known. In this study, we used microarray analysis to determine if additional genes are involved.
2011-11-16 | GSE32314 | GEO
Project description:Several eukaryotic parasites form cysts that transmit infection. The process is found in diverse organisms such as Toxoplasma, Giardia, and nematodes. In Entamoeba histolytica this process cannot be induced in vitro, making it difficult to study. In Entamoeba invadens, stage conversion can be induced, but its utility as a model system to study developmental biology has been limited by a lack of genomic resources. We carried out genome and transcriptome sequencing of E. invadens to identify molecular processes involved in stage conversion.We report the sequencing and assembly of the E. invadens genome and use whole transcriptome sequencing to characterize changes in gene expression during encystation and excystation. The E. invadens genome is larger than that of E. histolytica, apparently largely due to expansion of intergenic regions; overall gene number and the machinery for gene regulation are conserved between the species. Over half the genes are regulated during the switch between morphological forms and a key signaling molecule, phospholipase D, appears to regulate encystation. We provide evidence for the occurrence of meiosis during encystation, suggesting that stage conversion may play a key role in recombination between strains.Our analysis demonstrates that a number of core processes are common to encystation between distantly related parasites, including meiosis, lipid signaling and RNA modification. These data provide a foundation for understanding the developmental cascade in the important human pathogen E. histolytica and highlight conserved processes more widely relevant in enteric pathogens.
| S-EPMC4053983 | biostudies-literature