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Published on: January 27, 2019
Bioactive lipids in Trypanosoma cruzi infection
Fabiana S Machado1, Shankar Mukherjee, Louis M Weiss
1Department of Biochemistry and Immunology, Institute of Biological Science, Federal University of Minas Gerais, Belo Horizonte, Brazil.
Advances in Parasitology
|September 3, 2011
Summary
Bioactive lipids, like arachidonic acid (AA) metabolites, significantly impact Chagas disease progression. Targeting these eicosanoids offers potential therapeutic strategies with specific windows for effective treatment.
Area of Science:
- Parasitology
- Immunology
- Cardiovascular Medicine
Background:
- Chagas disease, caused by *Trypanosoma cruzi*, is a significant health concern in the Americas and increasingly recognized globally.
- Cardiovascular complications affect 10-30% of infected individuals, highlighting the need for better understanding and treatment.
- Bioactive lipids, particularly arachidonic acid (AA)-derived metabolites, are increasingly implicated in modulating disease progression.
Purpose of the Study:
- To investigate the role of AA-derived lipids in *Trypanosoma cruzi* infection.
- To explore the therapeutic potential and timing of cyclooxygenase (COX) inhibitor use in Chagas disease.
- To elucidate the origin and function of specific lipid mediators, such as thromboxane A2 (TXA2), during infection.
Main Methods:
- Analysis of circulating AA metabolite levels during *T. cruzi* infection.
- Pharmacological inhibition of prostaglandin synthesis using COX inhibitors in acute and chronic infection models.
- Studies using *T. cruzi*-infected mice deficient in AA biosynthetic enzymes (e.g., COX-1 null mice).
Main Results:
- COX inhibitor treatment showed differential effects: detrimental in acute infection (increased parasite load, mortality) but beneficial in chronic infection (improved cardiac function).
- Studies in COX-1 null mice revealed parasite dependence on host metabolism and identified parasite-derived TXA2 as a potential quorum sensor.
- Eicosanoids appear to act as immunomodulators in acute infection, potentially contributing to cardiovascular damage in chronic stages.
Conclusions:
- Eicosanoids are critical mediators in Chagas disease, influencing both host response and parasite biology.
- Targeting eicosanoid pathways presents a promising therapeutic avenue, with distinct therapeutic windows for acute versus chronic infection.
- Further research into NSAID mechanisms may clarify host responses and inform therapeutic strategies for Chagas disease.
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