Journal
PROGRESS IN NEUROBIOLOGY
Volume 219, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pneurobio.2022.102369
Keywords
Anoctamin 9; TMEM16J; cAMP; Cation channel; Olfaction; Amplification
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Funding
- National Research Foundation of Korea
- [2020R1A3A300192911]
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Animals rely on olfaction to determine the smells of foods, prey, or predators. The Anoctamin 9 channel in olfactory sensory neurons plays a crucial role in amplifying olfactory signals, impacting mammalian olfactory transduction.
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 trans-duction 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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