Direct retino-raphe projection alters serotonergic tone and affective behavior.
Direct retino-raphe projection alters serotonergic tone and affective behavior.
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直接视网膜中缝投射改变血清素能色调和情感行为
DOI:
10.1038/npp.2013.35
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发表时间:
2013-06
期刊:
影响因子:
--
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中科院分区:
文献类型:
--
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Light is a powerful modulator of higher-order cognitive processes such as mood but it remains unclear which neural circuits mediate the impact of light on affective behavior. We found that light deprivation produces a depressive-like behavioral state that is reversed by activation of direct retinal signals to the serotonergic dorsal raphe nucleus (DRN) in a manner equivalent to treatment with the selective serotonin reuptake inhibitor fluoxetine. Surprisingly, the DRN-projecting retinal ganglion cells (RGCs) are indistinguishable from the classic alpha/Y-like RGC type that contributes to image-forming visual pathways. Silencing RGC firing or specific immunotoxin ablation of DRN-projecting RGCs increased depressive-like behavior and reduced serotonin levels in the DRN. Serotonin has a key role in the pathophysiology of depression, and these results demonstrate that retino-raphe signals modulate DRN serotonergic tone and affective behavior.
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