Association of human immune response to Aedes aegypti salivary proteins with dengue disease severity
Autor(es): Machain-Williams, C.; Mammen Jr., M. P.; Zeidner, N. S.; Beaty, B. J.; Blair, C. D.; Prenni, J. E.; Nisalak, A.
Resumo: Dengue viruses (DENV; family Flaviviridae, genus Flavivirus) are transmitted by Aedes aegypti mosquitoes and can cause dengue fever (DF), a relatively benign disease, or more severe dengue haemorrhagic fever (DHF). Arthropod saliva contains proteins delivered into the bite wound that can modulate the host haemostatic and immune responses to facilitate the intake of a blood meal. The potential effects on DENV infection of previous exposure to Ae. aegypti salivary proteins have not been investigated. We collected Ae. aegypti saliva, concentrated the proteins and fractionated them by nondenaturing polyacrylamide gel electrophoresis (PAGE). By the use of immunoblots, we analysed reactivity with the mosquito salivary proteins (MSP) of sera from 96 Thai children diagnosed with secondary DENV infections leading either to DF or DHF, or with no DENV infection, and found that different proportions of each patient group had serum antibodies reactive to specific Ae. aegypti salivary proteins. Our results suggest that prior exposure to MSP might play a role in the outcome of DENV infection in humans.
Palavras-Chave: Human diseases; Viruses; Defence mechanisms; Disease transmission; Infection; Children; Gel electrophoresis; Dengue; Hemorrhagic fever; Saliva; Immune response; Aedes aegypti; Arthropoda; Flavivirus; Flaviviridae
Imprenta: Parasite Immunology, v. 34, n. 1, p. 15-22, 2012.
Descritores: Aedes aegypti - Flaviviridae ; Aedes aegypti - Immune response ; Aedes aegypti - Proteins ; Aedes aegypti - Infectious diseases ; Aedes aegypti - Virus ; Aedes aegypti - Transmission ; Aedes aegypti - Dengue ; Aedes aegypti - Immunology ; Aedes aegypti - Public health
Data de publicação: 2012
