Dataset Information

Proteomic sequencing of Giardia duodenalis-secreted extracellular vesicles

ABSTRACT: The study involved the proteomic sequencing of extracellular vesicles secreted by Giardia duodenalis, statistical analysis of detected proteins, and GO analysis and enrichment KEGG analysis of proteins

INSTRUMENT(S): LTQ Orbitrap Elite

ORGANISM(S): Giardia Intestinalis (giardia Lamblia)

SUBMITTER: Wenbo Cheng

LAB HEAD: Lu Li

PROVIDER: PXD054439 | Pride | 2025-05-07

REPOSITORIES: Pride

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Dataset's files

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			Action	DRS
	R21759-GEVS.mzTab	Mztab
	R21759-GEVS.raw	Raw

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Publications

Giardiavirus infection alleviates growth restriction and intestinal damage caused by the intestinal parasite Giardia duodenalis.

Li Lu L Cao Lili L Yang Qiankun Q Zhao Zhiteng Z Yuan Jianqi J Liu Shaoxiong S Jin Qinqin Q Li Jianhua J Li Xin X Wang Xiaocen X Zhang Nan N Jiang Weina W Gong Pengtao P

Parasites & vectors 20250224 1

<h4>Background</h4>Giardia duodenalis is a prevalent intestinal pathogen causing giardiasis, a condition characterized by diarrhea and frequently linked to malnutrition and growth impairments in children. The virulence of Giardiavirus (GLV) may efficiently clear Giardia parasites from infected patients. However, we have a limited understanding of GLV transmission among Giardia species and GLV-infected Giardia's impact on pathogenicity.<h4>Methods</h4>This study investigated extracellular vesicle ...[more]

PMID: 39994730

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Project description:Despite of Giardia duodenalis being one of the most commonly found intestinal pathogens in humans and animals, little is known of the host-parasite interactions in natural hosts. Therefore, the objective of this study was to investigate the intestinal response in calves following a G. duodenalis infection, using a bovine high-density oligo microarray to analyze global gene expression in the small intestine. The resulting microarray data suggested a decrease in inflammation, immune response and immune cell migration in infected animals, which was examined in more detail by quantitative real-time PCR on a panel of cytokines combined with histological analyses. The cytokine transcription levels showed a trend of down regulated expression in infected animals compared to the negative controls, best seen in jejunum for IL-6 and IL-8 and statistically significant for IL-17, IL-13 and IFN-?. No increased immune cell recruitment could be seen after infection, as well as no intestinal pathologies, such as villus shortening or increased levels of apoptosis. Key regulators in this intestinal response seem to be the nuclear peroxisome proliferator-activated receptors alpha (PPARA) and gamma (PPARG), for which an up-regulated expression was seen on microarray and qRT-PCR data. The activation of PPARs can exert an anti-inflammatory effect with inhibition of pro-inflammatory cytokines and a decrease in cell recruitment. . How the PPARs are activated during a Giardia infection still needs to be further elucidated. Eight male Holstein calves aged two to four weeks old were used for the trial. Prior to arrival, all animals were screened for the presence of Giardia cysts in their faecal samples. After confirming their negative status for all these pathogens, four of the animals were randomly chosen and placed in a G. duodenalis contaminated environment, whereas the four remaining animals were kept as negative controls in separate G. duodenalis-free stables. All calves in the study received the same commercial milk replacer. After three weeks, the presence or absence of a G. duodenalis infection was confirmed by IFA on faecal samples after which the animals were euthanized. Changes in gene expression profiles induced by Giardia duodenalis infection were compared using a high-density 60mer bovine oligo microarray.