Molecular vibration-sensing component in human olfaction.

Molecular vibration-sensing component in human olfaction.
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DOI:
10.1371/journal.pone.0055780
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Turin L
Turin L
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Gane S;Georganakis D;Maniati K;Vamvakias M;Ragoussis N;Skoulakis EM;Turin L

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嗅觉究竟是通过气味的形状、分子振动,还是两者兼而有之来识别气味,这仍然是一个悬而未决的、有争议的问题。解决这个问题的一种方便的方法是测试氘化和未氘化气味同位素体之间的气味特征差异,因为它们具有相同的基态构象,但振动模式不同。在之前的一篇论文(Franco et al. (2011) Proc Natl Acad Sci USA 108:9, 3797-802)中,我们发现果蝇可以通过振动机制识别气味剂中氘的存在。在这里,我们解决的问题,是否人类也可以区分氘和未氘气味。先前的一份报告(Keller and Vosshall (2004) Nat Neurosci 7:4, 337-8)表明幼稚的受试者无法区分苯乙酮和d-8苯乙酮。在这里,我们确认并将这些结果扩展到训练对象和气相色谱[GC]-纯气味。然而,我们也表明受试者很容易区分经气相色谱纯标准纯化的氘化和未氘化麝香气味。这些结果与人类嗅觉中的振动成分一致。
Whether olfaction recognizes odorants by their shape, their molecular vibrations, or both remains an open and controversial question. A convenient way to address it is to test for odor character differences between deuterated and undeuterated odorant isotopomers, since these have identical ground-state conformations but different vibrational modes. In a previous paper (Franco et al. (2011) Proc Natl Acad Sci USA 108:9, 3797-802) we showed that fruit flies can recognize the presence of deuterium in odorants by a vibrational mechanism. Here we address the question of whether humans too can distinguish deuterated and undeuterated odorants. A previous report (Keller and Vosshall (2004) Nat Neurosci 7:4, 337-8) indicated that naive subjects are incapable of distinguishing acetophenone and d-8 acetophenone. Here we confirm and extend those results to trained subjects and gas-chromatography [GC]-pure odorants. However, we also show that subjects easily distinguish deuterated and undeuterated musk odorants purified to GC-pure standard. These results are consistent with a vibrational component in human olfaction.
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