Related Experiment Videos
Platelet-activating factor-like activity isolated from Trypanosoma cruzi.
Marta T Gomes1, Robson Q Monteiro, Luciano A Grillo
1Instituto de Microbiologia, Prof. Paulo de Góes, Universidade Federal do Rio de Janeiro, Cidade Universitária, CCS, Bloco I, Ilha do Fundão, 21941-590 Rio de Janeiro, RJ, Brazil.
International Journal for Parasitology
|December 13, 2005
Summary
Trypanosoma cruzi utilizes a platelet-activating factor-like system to differentiate into its infectious form. This discovery offers new insights into Chagas disease pathogenesis and potential therapeutic targets.
Area of Science:
- Parasitology
- Molecular Biology
- Immunology
Background:
- Platelet-activating factor (PAF) is a potent lipid mediator involved in inflammation and cell differentiation.
- Trypanosoma cruzi, the parasite causing Chagas disease, differentiates within insect vectors.
- Previous work indicated PAF can trigger T. cruzi differentiation in vitro.
Purpose of the Study:
- To investigate the presence and function of a PAF-like system in T. cruzi.
- To determine if this system influences parasite differentiation and host cell interaction.
Main Methods:
- Isolation and characterization of a PAF-like lipid from T. cruzi epimastigotes.
- Assays for platelet aggregation, macrophage infection, and parasite differentiation.
- Use of PAF antagonist (WEB 2086) and antibodies against PAF receptor.
Main Results:
- A PAF-like activity was isolated from T. cruzi, inducing platelet aggregation and stimulating T. cruzi infection of macrophages.
- This activity promoted epimastigote differentiation into metacyclic trypomastigotes.
- PAF receptor-like components were detected on T. cruzi epimastigotes.
Conclusions:
- T. cruzi possesses an autocrine PAF-like ligand-receptor system.
- This system modulates parasite differentiation into the infectious stage.
- This finding opens avenues for novel Chagas disease therapeutic strategies.