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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. s1, 2013, pp. 80-87
Bioline Code: oc13191
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. s1, 2013, pp. 80-87

 en Circadian clock of Aedes aegypti check for this species in other resources : effects of blood-feeding, insemination and RNA interference
Gentile, Carla; da S. Rivas, Gustavo Bueno; Lima, José B.P.; Bruno, Rafaela Vieira & Peixoto, Alexandre Afranio

Abstract

Mosquitoes are the culprits of some of the most important vector borne diseases. A species’ potential as a vector is directly dependent on their pattern of behaviour, which is known to change according to the female’s physiological status such as whether the female is virgin/mated and unfed/blood-fed. However, the molecular mechanism triggered by and/or responsible for such modulations in behaviour is poorly understood. Clock genes are known to be responsible for the control of circadian behaviour in several species. Here we investigate the impact mating and blood-feeding have upon the expression of these genes in the mosquito Aedes aegypti check for this species in other resources . We show that blood intake, but not insemination, is responsible for the down-regulation of clock genes. Using RNA interference, we observe a slight reduction in the evening activity peak in the fourth day after dstim injection. These data suggest that, as in Drosophila, clock gene expression, circadian behaviour and environmental light regimens are interconnected in Ae. aegypti.

Keywords
clock genes; blood-feeding; insemination; RNAi; behaviour; Aedes aegypti

 
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