한빛사논문
Hyungsup Kima, Hyesu Kima,b, Luan Thien Nguyena,c, Taewoong Haa, Sujin Lima,c, Kyungmin Kima, Soon Ho Kima, Kyungreem Hana, Seung Jae Hyeona, Hoon Ryua, Yong Soo Parkd, Sang Hyun Kimd, In-Beom Kimd, Gyu-Sang Honga, Seung Eun Leea, Yunsook Choia,e, Lawrence B. Cohena,e, Uhtaek Oha,b
aBrain Science Institute, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
bDepartment of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea
cCollege of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
dDepartment of Anatomy, Catholic Institute for Applied Anatomy, College of Medicine, Catholic University of Korea, Seoul 06591, Republic of Korea
eDepartment of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT 06510, USA
Correspondence to: Uhtaek Oh
Abstract
Sensing smells of foods, prey, or predators determines animal survival. Olfactory sensory neurons in the olfactory epithelium (OE) detect odorants, where cAMP and Ca2+ play a significant role in transducing odorant inputs to electrical activity. Here we show Anoctamin 9, a cation channel activated by cAMP/PKA pathway, is expressed in the OE and amplifies olfactory signals. Ano9-deficient mice had reduced olfactory behavioral sensitivity, electro-olfactogram signals, and neural activity in the olfactory bulb. In line with the difference in olfaction between birds and other vertebrates, chick ANO9 failed to respond to odorants, whereas chick CNGA2, a major transduction channel, showed greater responses to cAMP. Thus, we concluded that the signal amplification by ANO9 is important for mammalian olfactory transduction.
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