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Bioactive lipids regulate Trypanosoma cruzi development

  • Immunology and Host-Parasite Interactions - Original Paper
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Abstract

Trypanosoma cruzi is the etiological agent of Chagas disease. These parasites undergo dramatic morphological and physiological changes during their life cycle. The human-infective metacyclic trypomastigotes differentiate from epimastigotes inside the midgut of the Triatominae insect vector. Our group has shown that the saliva and feces of Rhodnius prolixus contains a lysophospholipid, lysophosphatidylcholine (LPC), which modulates several aspects of T. cruzi infection in macrophages. LPC hydrolysis by a specific lysophospholipase D, autotaxin (ATX), generates lysophosphatidic acid (LPA). These bioactive lysophospholipids are multisignaling molecules and are found in human plasma ingested by the insect during blood feeding. Here, we show the role of LPC and LPA in T. cruzi proliferation and differentiation. Both lysophospholipids are able to induce parasite proliferation. We observed an increase in parasite growth with different fatty acyl chains, such as C18:0, C16:0, or C18:1 LPC. The dynamics of LPC and LPA effect on parasite proliferation was evaluated in vivo through a time- and space-dependent strategy in the vector gut. LPC but not LPA was also able to affect parasite metacyclogenesis. Finally, we determined LPA and LPC distribution in the parasite itself. Such bioactive lipids are associated with reservosomes of T. cruzi. To the best of our knowledge, this is the first study to suggest the role of surrounding bioactive lipids ingested during blood feeding in the control of parasite transmission.

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Acknowledgments

We wish to express our gratitude to Desenir Adriano Pedro, Yasmin de Paule Gutierrez Simão, Mileane S. Busch, Lilian Soares da Cunha Gomes, and Heloisa Coelho for the excellent technical assistance.

In memoriam to professor Dr. Mário Alberto Cardoso Silva Neto for essential contribution to this work.

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Correspondence to Georgia Correa Atella.

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All the animal care and experimental protocols were conducted in accordance with the guidelines of the institutional animal care and use committee (Comissão de Avaliação do Uso de Animais em Pesquisa da Universidade Federal do Rio de Janeiro, CAUAP-UFRJ) and the NIH Guide for the Care and Use of Laboratory Animals (ISBN 0-309-05377-3). The protocols were approved by CEUA-UFRJ (Comissão de Ética no Uso de Animais da Universidade Federal do Rio de Janeiro) under registry number #115/13. Technicians at the animal facility of the Institute of Medical Biochemistry Leopoldo de Meis (UFRJ) performed the entire rabbit husbandry under strict guidelines to ensure careful and consistent handling of the animals.

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This work was supported by Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ) (www.faperj.br) and by Conselho Nacional de Pesquisa e Desenvolvimento (CNPq) (www.cnpq.br). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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Section Editor: Marta Teixeira

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Chagas-Lima, A.C., Pereira, M.G., Fampa, P. et al. Bioactive lipids regulate Trypanosoma cruzi development. Parasitol Res 118, 2609–2619 (2019). https://doi.org/10.1007/s00436-019-06331-9

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  • DOI: https://doi.org/10.1007/s00436-019-06331-9

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