Nat Neurosci:食物气味为何让你食欲大增?

2014-03-18 Nature中文网 Nature中文网

食物的香味为何让你食欲大增?3月《自然—神经科学》上的一项研究找到了原因——大脑嗅球中1型大麻素(CB1)受体的存在。这项研究还发现CB1受体的激活可以加强气味感知从而促进食物摄取,研究人员同时认为这些受体为改变导致肥胖的进食行为提供了一个潜在的药理学靶向。 短时间的节食行为被认为可以增加哺乳动物大脑中内源性大麻素的水平浓度。饥饿也被认为可以增强我们对气味的感知并促进食物消化。Giovanni

食物的香味为何让你食欲大增?3月《自然—神经科学》上的一项研究找到了原因——大脑嗅球中1型大麻素(CB1)受体的存在。这项研究还发现CB1受体的激活可以加强气味感知从而促进食物摄取,研究人员同时认为这些受体为改变导致肥胖的进食行为提供了一个潜在的药理学靶向。

短时间的节食行为被认为可以增加哺乳动物大脑中内源性大麻素的水平浓度。饥饿也被认为可以增强我们对气味的感知并促进食物消化。Giovanni Marsicano等人报告称,小鼠的嗅球中含有CB1受体,可通过内源性或外源性大麻素(比如大麻中的大麻素)将其激活,从而增强食物的快速摄取。而实际上,小鼠在获得外源性大麻素刺激(比如THC,大麻中的一种活跃成分)时,胃口大增的例子更常见。研究人员发现嗅球中的这类大麻素受体在进食行为的增加中也是必需的。

因为这种CB1受体似乎只在动物禁食或感到饥饿时才会产生增强食欲,所以嗅球中的CB1受体或可用作改变进食行为的一种潜在药理学靶向。

原始出处:

Soria-Gómez E1, Bellocchio L2, Reguero L3, Lepousez G4, Martin C5, Bendahmane M5, Ruehle S6, Remmers F6, Desprez T7, Matias I7, Wiesner T7, Cannich A7, Nissant A4, Wadleigh A7, Pape HC8, Chiarlone AP9, Quarta C10, Verrier D7, Vincent P7, Massa F7, Lutz B6, Guzmán M9, Gurden H5, Ferreira G11, Lledo PM4, Grandes P12, Marsicano G1.The endocannabinoid system controls food intake via olfactory processes.Nat Neurosci. 2014 Mar;17(3):407-15. doi: 10.1038/nn.3647. Epub 2014 Feb 9.

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    2014-04-24 liye789132251
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    2014-03-20 lsndxfj
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    2014-03-20 yhy100201
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