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Theileria

ABSTRACT: Comparision of Theileria annulata and Theileria parva genomes

PROVIDER: PRJNA14000 | ENA |

REPOSITORIES: ENA

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Dataset's files

Source:

			Action	DRS
		Other
	AAGK01.dat.gz	Other
	AAGK01.fasta.gz	Fasta.gz
	AAGK01.master.dat	Other
	SRR3001169_1.fastq.gz	Fastqsanger.gz

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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.

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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.

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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.

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