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Modified lipids from Trypanosoma cruzi amastigotes down-regulate the pro-inflammatory response and increase the
Federico Nicolas Penas1, Emanuel Bott2, Alan Brito Carneiro3
1Facultad de Medicina, Universidad de Buenos Aires, Departamento de Microbiología, Parasitología e Inmunología, Buenos Aires, Argentina; CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas en Retrovirus y Sida (INBIRS), Buenos Aires, Argentina.
Abstract:
Herein, we analyzed the in vitro effect induced by total lipid extracts from Trypanosoma cruzi amastigotes of RA and K98 strains, which were obtained after overnight incubation (RAinc and K98inc) to mimic phospholipid hydrolytic processes that occurred adjacent to degenerating amastigote nests in tissues of Chagas disease patients. We demonstrated that RAinc and K98inc might possess bioactive lipid molecules with anti-inflammatory bias since they inactivated the NF-κB pathway, in contrast to intact lipids. Moreover, different M1/M2 macrophage phenotype markers of polarization were analyzed by RT-qPCR which evidenced that RAinc and K98inc promoted an increased expression of the M2 markers Arginase-1, IL-10, FIZZ and YM-1, and a decreased expression of iNOS and proinflammatory cytokines IL-6 and TNF-α. All these results indicate the relevant role of T. cruzi in bioactive lipid molecules, deepening thus our understanding of their contribution to immunomodulatory mechanisms as well as to macrophage polarization that occurs during the course of Chagas disease.
Insights
Lipid extracts from Trypanosoma cruzi amastigotes, specifically RAinc and K98inc, show anti-inflammatory effects by inhibiting the NF-κB pathway and promoting M2 macrophage polarization in vitro.
Area of Science:
- Parasitology
- Immunology
- Molecular Biology
Background:
- Chagas disease is caused by Trypanosoma cruzi.
- Understanding the host-parasite interaction is crucial for therapeutic development.
- Lipid mediators play a role in modulating inflammatory responses.
Purpose of the Study:
- To investigate the in vitro immunomodulatory effects of lipid extracts from Trypanosoma cruzi amastigotes.
- To analyze the impact of these lipids on macrophage polarization.
- To explore the potential anti-inflammatory properties of Trypanosoma cruzi-derived lipids.
Main Methods:
- Preparation of total lipid extracts from Trypanosoma cruzi amastigotes (RA and K98 strains) after overnight incubation (RAinc and K98inc).
- Assessment of NF-κB pathway activation.
- Analysis of M1/M2 macrophage phenotype markers using RT-qPCR.
Main Results:
- RAinc and K98inc lipid extracts inactivated the NF-κB pathway, unlike intact lipids.
- These extracts promoted M2 macrophage polarization, indicated by increased expression of Arginase-1, IL-10, FIZZ, and YM-1.
- Pro-inflammatory markers, including iNOS, IL-6, and TNF-α, were decreased.
Conclusions:
- Trypanosoma cruzi possesses bioactive lipid molecules with anti-inflammatory properties.
- These lipids contribute to immunomodulatory mechanisms and macrophage polarization in Chagas disease.
- Further research into these lipids could reveal novel therapeutic strategies for Chagas disease.
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