Avoiding DEET through insect gustatory receptors.

Avoiding DEET through insect gustatory receptors.
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DOI:
10.1016/j.neuron.2010.07.006
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发表时间:
2010-08-26
期刊:
影响因子:
16.2
通讯作者:
Montell, Craig
Montell, Craig
中科院分区:
医学1区
文献类型:
--
作者:
Lee, Youngseok;Kim, Sang Hoon;Montell, Craig

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DEET is the most widely used insect repellent worldwide. In Drosophila olfactory receptor neurons (ORNs), DEET is detected through a mechanism that employs the olfactory receptor, OR83b. However, it is controversial as to whether ORNs respond directly to DEET or whether DEET blocks the response to attractive odors. Here, we showed that DEET suppressed feeding behavior in Drosophila and this effect was mediated by gustatory receptor neurons (GRNs). DEET was potent in suppressing feeding as <0.1% DEET elicited aversive behavior. Inhibition of feeding by DEET required multiple gustatory receptors (GRs), which were expressed in inhibitory GRNs. DEET stimulated action potentials in GRNs that respond to aversive compounds, and this response was lost in Gr32a, Gr33a and Gr66a mutants. Since 0.02% DEET elicited action potentials, we conclude that DEET directly activates of GRNs. We suggest that the effectiveness of DEET in pest control owes to its dual action in inducing avoidance simultaneously via GRNs and ORNs.
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