Daily oscillation of odorant detection in rat olfactory epithelium

被引:4
作者
Francois, Adrien [1 ,2 ]
Bombail, Vincent [1 ]
Jarriault, David [3 ]
Acquistapace, Adrien [1 ]
Grebert, Denise [1 ]
Grosmaitre, Xavier [3 ]
Meunier, Nicolas [1 ,2 ]
机构
[1] INRA, NeuroBiol Olfact UR1197, F-78350 Jouy En Josas, France
[2] Univ Paris Saclay, NBO, UVSQ, INRA, Jouy En Josas, France
[3] Univ Bourgogne Franche Comte, CNRS, Ctr Sci Gout & Alimentat, INRA, Dijon, France
关键词
biological rhythms; circadian rhythms; olfaction; sensory physiology; signal transduction; CIRCADIAN CLOCK; SUPRACHIASMATIC NUCLEUS; SENSORY NEURONS; RECEPTOR-CELLS; INDUCED FOS; BULB; RHYTHMS; SYSTEM; DEPENDS; STIMULATION;
D O I
10.1111/ejn.13600
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Most of biological variables follow a daily rhythm. It holds true as well for sensory capacities as two decades of research have demonstrated that the odorant induced activity in the olfactory bulbs oscillates during the day. Olfactory bulbs are the first central nervous system structures, which receive inputs from the olfactory neurons located in the nose olfactory epithelium in vertebrates. So far, data on variation in odorant detection in the olfactory epithelium throughout the day are missing. Using electroolfactogram recordings in rats housed under daily light and dark cycles, we found that the olfactory epithelium responsiveness varies during the day with a maximum in the beginning of the light phase. This fluctuation was consistent with cycling of transduction pathway gene expression in the olfactory epithelium examined by qPCR. It was also consistent with the levels of two transduction pathway proteins (olfactory-type G protein and adenylyl cyclase III) examined by western blot. Daily variations were also observed at the level of olfactory sensory neurons responses recorded by patch-clamp. To rule out a potential effect of the feeding status of the animal, we examined the variation in odorant response in starved animals during the day. We observed a similar pattern to ad libidum fed animals. Taken together, our results reveal that the olfactory epithelium sensitivity varies during the day in part due to modulation of the very first step of odorant detection.
引用
收藏
页码:1613 / 1622
页数:10
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