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Mediators and mechanisms involved in the sensitization and desensitization processes to Aedes egypti mosquito bites

Grant number: 14/14379-4
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2014
Effective date (End): May 31, 2017
Field of knowledge:Biological Sciences - Immunology - Applied Immunology
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Anderson de Sá Nunes
Grantee:Leila Santos Neto
Home Institution: Instituto de Ciências Biomédicas (ICB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:09/09892-6 - Functional immunome of Aedes aegypti saliva, AP.JP

Abstract

Hematophagous mosquitoes represent the most important group of arthropod vectors, transmitting a number of parasitic and infectious diseases to humans. Females of Aedes aegypti species are vectors of dengue fever, yellow fever and Chikungunya fever. During the blood meal, hematophagous mosquitoes deal with the challenges posed by the vertebrate host: hemostasis barrier and immune system. To do so, the saliva of these vectors present several activities such as platelets' anti-aggregant, vasodilator, anti-coagulant, anti-inflammatory and immunomodulator. Several studies suggest that the proteins found in the saliva of infected mosquitoes are able to increase viral transmission and infectivity. Some other studies show that the salivary cocktail is able to sensitize humans, although most of them present desensitization over time. Our group has been studying the so-called "functional immune" of Ae. aegypti saliva, a pannel of the immunomodulatory activities found in the saliva. Our recent results suggest that the sensitization and desensitization processes can be reproduced in the murine model. Thus, the present project aims to evaluate the immunological mediators and mechanisms involved in the sensitization and desensitization processes to the salivary components of Ae. aegypti mosquitoes. Experimental models of acute and chronic inflammation will be employed to study these processes. We will also evaluate the mosquitoes' biological fitness following blood feeding in theses hosts. Moreover, a comparison of the humoral response profiles between mice and humans will be evaluated using serum of both species. (AU)

Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
NETO, Leila Santos. Mediators and mechanisms involved in the sensitization and desensitization to Aedes aegypti bites.. 2018. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Ciências Biomédicas São Paulo.

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