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Updated: Feb 21, 2026
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3-D Imaging and Analysis of Neurons Infected In Vivo with Toxoplasma gondii
Published on: December 9, 2014
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Toxoplasma gondii assembles extracellular vesicles with conserved lipid profiles across host cell types
Teresa Cruz-Bustos1, Anja Joachim1
1Institute of Parasitology, Department of Biological Sciences and Pathobiology, University of Veterinary Medicine Vienna, Vienna, Austria.
Frontiers in Cellular and Infection Microbiology
|February 20, 2026
Summary
Toxoplasma gondii extracellular vesicles (TgEVs) have a conserved, distinct lipid profile differing from host cells. This selective lipid core suggests key roles in parasite-host communication and infection dynamics.
Area of Science:
- Parasitology
- Cell Biology
- Lipidomics
Background:
- Toxoplasma gondii manipulates host metabolism, including lipid pathways, for infection.
- Extracellular vesicles (EVs) mediate parasite-host interactions, but their lipid cargo is poorly understood.
- T. gondii EVs (TgEVs) are critical for host cell colonization.
Purpose of the Study:
- To characterize the lipid composition of TgEVs secreted by tachyzoites.
- To compare TgEV lipidomes with their host cells across different cell types.
Main Methods:
- Lipidomic analysis of TgEVs from four host cell types using liquid chromatography-tandem mass spectrometry.
- Comparative lipid profiling and principal component analysis for compositional patterns.
- Differential abundance testing to identify enriched or depleted lipid species.
Main Results:
- 194 lipid species across 15 classes were identified in TgEVs.
- TgEVs exhibited a conserved and distinct lipid profile, differing from host cells.
- Triacylglycerols were enriched in TgEVs, indicating active lipid sorting.
Conclusions:
- T. gondii EVs possess a conserved, distinct lipidome, differing from host cells.
- The selective lipid core of TgEVs suggests roles in host communication and immune modulation.
- This study provides a foundation for understanding lipid-mediated signaling in T. gondii infections.
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