A noncanonical inhibitory circuit dampens behavioral sensitivity to light.
A noncanonical inhibitory circuit dampens behavioral sensitivity to light.
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DOI:
10.1126/science.aay3152
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发表时间:
2020-05-01
期刊:
影响因子:
--
通讯作者:
Schmidt TM
中科院分区:
文献类型:
--
作者:
Sonoda T;Li JY;Hayes NW;Chan JC;Okabe Y;Belin S;Nawabi H;Schmidt TM
Retinal ganglion cells (RGCs) drive diverse, light-evoked behaviors from conscious visual perception to subconscious, non-image forming behaviors. It is thought that RGCs primarily drive these functions through the release of the excitatory neurotransmitter glutamate. We identified a subset of melanopsin-expressing, intrinsically photosensitive RGCs (ipRGCs) in mice that release the inhibitory neurotransmitter GABA at non-image forming brain targets. GABA release from ipRGCs dampened the sensitivity of both the pupillary light reflex and circadian photoentrainment, shifting the dynamic range of these behaviors to higher light levels. Our results identify an inhibitory RGC population in the retina and provide a circuit-level mechanism that contributes to the relative insensitivity of non-image forming behaviors at low light. Here we identify a GABAergic circuit from the eye to the brain that dampens the sensitivity of non-image forming visual behaviors.
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