Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/17956
Title: Microbiota activates IMD pathway and limits Sindbis infection in Aedes aegypti
Authors: Barletta, Ana Beatriz Ferreira
Silva, Maria Clara L. Nascimento
Talyuli, Octávio A. C.
Oliveira, José Henrique M.
Pereira, Luiza Oliveira Ramos
Oliveira, Pedro L.
Sorgine, Marcos Henrique F.
Affilliation: Universidade Federal do Rio de Janeiro. Instituto de Bioquímica Médica Leopoldo de Meis. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Bioquímica Médica Leopoldo de Meis. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Bioquímica Médica Leopoldo de Meis. Rio de Janeiro, RJ, Brasil.
Universidade Federal de Santa Catarina. Departamento de Microbiologia, Imunologia e Parasitologia. Florianópolis, SC, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Pesquisas em Leishmaniose. Rio de Janeiro, RJ. Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Bioquímica Médica Leopoldo de Meis. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro. Instituto de Bioquímica Médica Leopoldo de Meis. Rio de Janeiro, RJ, Brasil.
Abstract: Background: Aedes aegypti is the main vector of important arboviruses such as dengue, Zika and chikungunya. During infections mosquitoes can activate the immune pathways Toll, IMD and JAK/STAT to limit pathogen replication. Results: Here, we evaluate the immune response profile of Ae. aegypti against Sindbis virus (SINV). We analyzed gene expression of components of Toll, IMD and JAK/STAT pathways and showed that a blood meal and virus infection upregulated aaREL2 in a microbiota-dependent fashion, since this induction was prevented by antibiotic. The presence of the microbiota activates IMD and impaired the replication of SINV in the midgut. Constitutive activation of the IMD pathway, by Caspar depletion, leads to a decrease in microbiota levels and an increase in SINV loads. Conclusion: Together, these results suggest that a blood meal is able to activate innate immune pathways, through a nutrient induced growth of microbiota, leading to upregulation of aaREL2 and IMD activation. Microbiota levels seemed to have a reciprocal interaction, where the proliferation of the microbiota activates IMD pathway that in turn controls bacterial levels, allowing SINV replication in Ae. aegypti mosquitoes. The activation of the IMD pathway seems to have an indirect effect in SINV levels that is induced by the microbiota.
Keywords: Aedes aegypti
Sindbis virus
Immune response
IMD
Microbiota
Zika virus
Dengue
Chikungunya
keywords: Aedes aegypti
Vírus Sindbis
Resposta imune
Microbiota
Zika virus
Dengue
Chikungunya
Issue Date: 2017
Publisher: BioMed Central
Citation: BARLETTA, Ana Beatriz Ferreira; et al. Microbiota activates IMD pathway and limits Sindbis infection in Aedes aegypti. Parasites & Vectors, v.10:103, 9p, 2017.
DOI: 10.1186/s13071-017-2040-9
ISSN: 1756-3305
Copyright: open access
Appears in Collections:IOC - Artigos de Periódicos

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