Mosquito brains encode unique features of human odour to drive host seeking.
Mosquito brains encode unique features of human odour to drive host seeking.
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蚊子大脑编码人类气味的独特特征,以推动宿主寻求。
DOI:
10.1038/s41586-022-04675-4
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发表时间:
2022-05
期刊:
影响因子:
64.8
通讯作者:
中科院分区:
文献类型:
--
作者:
A globally invasive form of the mosquito Aedes aegypti specializes in biting humans, making it an efficient disease vector. Host-seeking females strongly prefer human odour over the odour of non-human animals, but exactly how they distinguish the two is not known. Vertebrate odours are complex blends of volatile chemicals with many shared components, making discrimination an interesting sensory coding challenge. Here we show that human and animal odour blends evoke activity in distinct combinations of olfactory glomeruli within the Aedes aegypti antennal lobe. One glomerulus in particular is strongly activated by human odour but responds weakly, or not at all, to animal odour. This ‘human-sensitive’ glomerulus is selectively tuned to the long-chain aldehydes decanal and undecanal, which we show are consistently enriched in human odour and which likely originate from unique human skin lipids. Using synthetic blends, we further demonstrate that signalling in the human-sensitive glomerulus significantly enhances long-range host-seeking behaviour in a wind tunnel, recapitulating preference for human over animal odour. Our work suggests that animal brains may distill complex odour stimuli of innate biological relevance into simple neural codes and reveals novel targets for the design of next-generation mosquito-control strategies.
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