Abstract：
:Sensory information is selectively or non-selectively enhanced and inhibited in the brain, but it remains unclear whether and how this occurs at the most peripheral level. Using in vivo calcium imaging of mouse olfactory bulb and olfactory epithelium in wild-type and mutant animals, we show that odors produce not only excitatory but also inhibitory responses in olfactory sensory neurons (OSNs). Heterologous assays indicate that odorants can act as agonists to some but inverse agonists to other odorant receptors. We also demonstrate that responses to odor mixtures are extensively suppressed or enhanced in OSNs. When high concentrations of odors are mixed, widespread antagonism suppresses the overall response amplitudes and density. In contrast, a mixture of low concentrations of odors often produces synergistic effects and boosts the faint odor inputs. Thus, odor responses are extensively tuned by inhibition, antagonism, and synergy at the most peripheral level, contributing to robust sensory representations.
journal_name
Cell Repjournal_title
Cell reportsauthors
Inagaki S,Iwata R,Iwamoto M,Imai Tdoi
10.1016/j.celrep.2020.107814subject
Has Abstractpub_date
2020-06-30 00:00:00pages
107814issue
13issn
2211-1247pii
S2211-1247(20)30795-6journal_volume
31pub_type
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