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Malaria Mosquitoes Use Different Odour Sensors to Satisfy Bloodlust
For example, the new study indicates that butylamine sensation requires a member of another family of unrelated molecular sensors known as Ionotropic Receptors (IRs) that have recently been described in the fruitfly Drosophila melanogaster.
Thus, two distinct olfactory signaling pathways are active in mosquitoes: one is OR-dependent and accounts for responses to DEET as well as a large number of general odorants, while the other is OR-independent and may be responsible for sensitivities to a specialized subset of odorants, such as amine containing compounds.
There is a good chance that this new set of receptors may be specifically tuned to detect a number of the odorants given off by humans, adds co-author R. Jason Pitts, a graduate student at Vanderbilt.
"If this is the case then it is quite likely that it will play a critical role in attempts to develop improved lures and repellents to control the spread of malaria," he said.
The study will be published next week in the online, open access journal PLoS Biology.
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