複雜混合氣味的受體調控
作者:
小柯機器人發布時間:2020/4/11 13:42:55
美國哥倫比亞大學Stuart Firestein和Elizabeth M. C. Hillman合作發現受體在外圍嗅覺編碼中的廣泛調控。相關論文於2020年4月10日發表於《科學》雜誌。
他們使用完整的小鼠嗅覺上皮細胞的掃描共聚焦對準平面激發(SCAPE)顯微鏡,對單個氣味混合物的反應進行了高通量分析,並行成像了約10,000個嗅覺感覺神經元。
在大量的反應細胞中,氣味的混合物不能引起對混合物中各個成分的簡單反應。相反,許多神經元在存在另一種氣味時表現出拮抗作用或反應增強。所測試的所有八種氣味均在不同的受體上充當激動劑和拮抗劑。他們表明這種響應的外圍調控增加了嗅覺系統區分複雜氣味混合物的能力。
據悉,對單一氣味的反應已得到很好的鑑定,但實際上,人們不斷接觸複雜的氣味混合物。
附:英文原文
Title: Widespread receptor-driven modulation in peripheral olfactory coding
Author: Lu Xu, Wenze Li, Venkatakaushik Voleti, Dong-Jing Zou, Elizabeth M. C. Hillman, Stuart Firestein
Issue&Volume: 2020/04/10
Abstract: Abstract
Olfactory responses to single odors have been well characterized but in reality we are continually presented with complex mixtures of odors. We performed high-throughput analysis of single-cell responses to odor blends using Swept Confocally Aligned Planar Excitation (SCAPE) microscopy of intact mouse olfactory epithelium, imaging ~10,000 olfactory sensory neurons in parallel. In large numbers of responding cells, mixtures of odors did not elicit a simple sum of the responses to individual components of the blend. Instead, many neurons exhibited either antagonism or enhancement of their response in the presence of another odor. All eight odors tested acted as both agonists and antagonists at different receptors. We propose that this peripheral modulation of responses increases the capacity of the olfactory system to distinguish complex odor mixtures.
DOI: 10.1126/science.aaz5390
Source: https://science.sciencemag.org/content/368/6487/eaaz5390
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037