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Articles, Cellular/Molecular

Similar Odorants Elicit Different Behavioral and Physiological Responses, Some Supersustained

Shelby A. Montague, Dennis Mathew and John R. Carlson
Journal of Neuroscience 25 May 2011, 31 (21) 7891-7899; DOI: https://doi.org/10.1523/JNEUROSCI.6254-10.2011
Shelby A. Montague
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Dennis Mathew
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John R. Carlson
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Abstract

An intriguing question in the field of olfaction is how animals distinguish among structurally similar odorants. We systematically analyzed olfactory responses elicited by a panel of 25 pyrazines. We found that structurally similar pyrazines elicit a wide range of behavioral responses from Drosophila larvae. Each pyrazine was tested against all functional receptors of the larval Odor receptor (Or) repertoire, yielding 525 odorant–receptor combinations. Different pyrazines vary markedly in the responses they elicit from the Or repertoire, with most strong responses deriving from two receptors, Or33b and Or59a. Surprisingly, 2-ethylpyrazine and 2-methylpyrazine, which elicit strikingly similar physiological responses across the receptor repertoire, elicit dramatically different behavioral responses. A small fraction of odorant-receptor combinations elicit remarkably long responses. These responses, which we term “supersustained” responses, are receptor specific and odorant specific, and can last for minutes. Such supersustained responses may prevent olfactory neurons from reporting contemporaneous information about the local odor environment. Odors that elicit such responses could provide a novel means of controlling insect pests and vectors of human disease by impairing the location of human hosts, food sources, and mates.

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The Journal of Neuroscience: 31 (21)
Journal of Neuroscience
Vol. 31, Issue 21
25 May 2011
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Similar Odorants Elicit Different Behavioral and Physiological Responses, Some Supersustained
Shelby A. Montague, Dennis Mathew, John R. Carlson
Journal of Neuroscience 25 May 2011, 31 (21) 7891-7899; DOI: 10.1523/JNEUROSCI.6254-10.2011

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Similar Odorants Elicit Different Behavioral and Physiological Responses, Some Supersustained
Shelby A. Montague, Dennis Mathew, John R. Carlson
Journal of Neuroscience 25 May 2011, 31 (21) 7891-7899; DOI: 10.1523/JNEUROSCI.6254-10.2011
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