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Theileria Epigenetics

ABSTRACT: Study of the histone marks of theileria annulata parasites.

PROVIDER: PRJEB33792 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3470710.fastq.gz	Fastqsanger.gz
	ERR3470720_1.fastq.gz	Fastqsanger.gz
	ERR3470720_2.fastq.gz	Fastqsanger.gz
	ERR3470711.fastq.gz	Fastqsanger.gz
	ERR3470712.fastq.gz	Fastqsanger.gz

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Theileria parasites sequester host eIF5A to escape elimination by host-mediated autophagy

Project description:Intracellular pathogens develop elaborate mechanisms to survive within the hostile environments of host cells. Theileria parasites infect bovine leukocytes and cause devastating diseases in cattle in developing countries. Theileria spp. have evolved sophisticated strategies to hijack host leukocytes, inducing proliferative and invasive phenotypes characteristic of cell transformation. Intracellular Theileria parasites secrete proteins into the host cell and recruit host proteins to induce oncogenic signaling for parasite survival. It is unknown how Theileria parasites evade host cell defense mechanisms, such as autophagy, to survive within host cells. Here, we show that Theileria annulata parasites sequester the host eIF5A protein to their surface to escape elimination by autophagic processes. We identified a small-molecule compound that reduces parasite load by inducing autophagic flux in host leukocytes, thereby uncoupling Theileria parasite survival from host cell survival. We took a chemical genetics approach to show that this compound induced host autophagy mechanisms and the formation of autophagic structures via AMPK activation and the release of the host protein eIF5A which is sequestered at the parasite surface. The sequestration of host eIF5A to the parasite surface offers a strategy to escape elimination by autophagic mechanisms. These results show how intracellular pathogens can avoid host defense mechanisms and identify a new anti-Theileria drug that induces autophagy to target parasite removal.

2023-12-19 | GSE250088 | GEO

miRNA profiling of extracellular vesicles from Theileria annulata infected B cells (TBL20) and their uninfected control counterparts (BL20)

Project description:We report significant changes in six bovine miRNA in vesicles from Theileria annulata infected cells

2019-05-14 | GSE118456 | GEO

Theileria parasites sequester host eIF5a to escape elimination by host-mediated autophagy

Project description:Intracellular pathogens develop elaborate mechanisms to survive within the hostile environments of host cells. Theileria parasites infect bovine leukocytes and cause devastating diseases in cattle in developing countries. Theileria spp. have evolved sophisticated strategies to hijack host leukocytes, inducing proliferative and invasive phenotypes characteristic of cell transformation. Intracellular Theileria parasites secrete proteins into the host cell and recruit host proteins to induce oncogenic signaling for parasite survival. It is unknown how Theileria parasites evade host cell defense mechanisms, such as autophagy, to survive within host cells. Here, we show that Theileria annulata parasites sequester the host eIF5a protein to their surface to escape elimination by autophagic processes. We identified a small-molecule compound that reduces parasite load by inducing autophagic flux in host leukocytes, thereby uncoupling Theileria parasite survival from host cell survival. We took a chemical genetics approach to show that this compound induced host autophagy mechanisms and the formation of autophagic structures via AMPK activation and the release of the host protein eIF5A which is sequestered at the parasite surface. The sequestration of host eIF5a to the parasite surface offers a strategy to escape elimination by autophagic mechanisms. These results show how intracellular pathogens can avoid host defense mechanisms and identify a new anti-Theileria drug that induces autophagy to target parasite removal.

2024-05-24 | PXD047937 | Pride

Theileria

Project description:Comparision of Theileria annulata and Theileria parva genomes

| PRJNA14000 | ENA

Modulation of activation-associated host cell gene expression by the apicomplexan parasite Theileria annulata

2012-10-01 | GSE36428 | GEO

Novel roles for GZMA and RASGRP1 in suppressing dissemination of both Theileria annulata-transformed macrophages and human B-lymphoma cells

Project description:Theileria annulata is a tick-transmitted apicomplexan parasite that infects and transforms bovine leukocytes into disseminating tumors that cause a disease called tropical theileriosis. Using comparative transcriptomics we identified genes transcriptionally perturbed during Theileria-induced transformation and highlighted a small set of genes associated with leukocyte dissemination. CRISPR/Cas9-mediated knock-down of GZMA and RASGRP1 in macrophages attenuated for dissemination led to a regain in their dissemination in Rag2/gC mice confirming their suppressor roles in vivo. Comparing the transcriptomes of 934 human cancer cell lines to that of Theileria-transformed bovine B cells again highlighted GZMA and RASGRP1 and CRISPR-mediated overexpression of GZMA and RASGRP1 dampened the dissemination potential of human B-lymphomas. The ensemble provide evidence for a novel suppressor function in the dissemination of both T. annulata-transformed bovine leukocytes and human B-lymphomas.

2020-08-18 | GSE135377 | GEO

ApiAP2 Factors as Candidate Regulators of Stochastic Commitment to Merozoite Production in Theileria annulata

Project description:Investigation of parasite (T. annulata) gene expression over the course of the life-cycle (sporozoite->macroschizont->merozoite->piroplasm). The study focused on the expression of known and putative transcription factors, in particular members of the ApiAP2 gene family. Up-stream motifs associated with stage-specifically expressed genes were identified during the course of the analysis. The experiment investigates Theileria annulata gene expression over a differentiation time-course - sporozoite through to piroplasm. 20 samples were analyzed - 4 x sporozoite (replicates), 3 x macroschizont (replicates), 3 x day 4, 3 x day 7, 3 x day 9 (replicates) and 4 x piroplasm (replicates)

2015-07-28 | E-GEOD-71307 | biostudies-arrayexpress

Single-cell RNA-Seq of bovine macrophage cell lines from two cow strains infected with Theileria

Project description:To understand the immune response of cows to the apicomplexan parasite Theileria annulata, we used ex vivo isolate cells derived from two infected calve : Holstein 12886 (Bos taurus), which is known to be susceptible to the disease, and Sahiwal 82H (Bos indicus), which is known to be resistant. The infected bovine macrophages of the two species with Theileria were collected and performed multiome 10X Chromium genomics scRNA-Seq.

2024-10-09 | E-MTAB-14450 | biostudies-arrayexpress

Theileria annulata TaHDAC1

Project description:Theileria annulata histone deacetylase 1 (TaHDAC1) regulates schizont to merozoite stage conversion

| PRJEB50801 | ENA

Modulation of activation-associated host cell gene expression by the apicomplexan parasite Theileria annulata

Project description:The experiment investigates bovine gene expression in response to LPS in uninfected and Theileria annulata-infected cell cultures A subset of genes are identified which are activated in response to LPS stimulation with further modulation due to parasite infection. Six experimental conditions with three replicates per condition. Total RNA prepared from cell cultures. BL20 (uninfected bovine lymphosarcoma cell line), BL20 4 hours post-LPS stimulation, BL20 18 hours post-LPS, TBL (T. annulata infected bovine cell line), TBL 4 hours post-LPS, TBL 18 hours post-LPS. Each hydridisation represents bovine and parasite gene expression on a single channel and 2 technical replicates of each probeset are represented on the chip.

2012-10-01 | E-GEOD-36428 | biostudies-arrayexpress

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