Abstract：
:Light plays a pivotal role in the regulation of affective behaviors. However, the precise circuits that mediate the impact of light on depressive-like behaviors are not well understood. Here, we show that light influences depressive-like behaviors through a disynaptic circuit linking the retina and the lateral habenula (LHb). Specifically, M4-type melanopsin-expressing retinal ganglion cells (RGCs) innervate GABA neurons in the thalamic ventral lateral geniculate nucleus and intergeniculate leaflet (vLGN/IGL), which in turn inhibit CaMKIIα neurons in the LHb. Specific activation of vLGN/IGL-projecting RGCs, activation of LHb-projecting vLGN/IGL neurons, or inhibition of postsynaptic LHb neurons is sufficient to decrease the depressive-like behaviors evoked by long-term exposure to aversive stimuli or chronic social defeat stress. Furthermore, we demonstrate that the antidepressive effects of light therapy require activation of the retina-vLGN/IGL-LHb pathway. These results reveal a dedicated retina-vLGN/IGL-LHb circuit that regulates depressive-like behaviors and provide a potential mechanistic explanation for light treatment of depression.
journal_name
Neuronjournal_title
Neuronauthors
Huang L,Xi Y,Peng Y,Yang Y,Huang X,Fu Y,Tao Q,Xiao J,Yuan T,An K,Zhao H,Pu M,Xu F,Xue T,Luo M,So KF,Ren Cdoi
10.1016/j.neuron.2019.01.037subject
Has Abstractpub_date
2019-04-03 00:00:00pages
128-142.e8issue
1eissn
0896-6273issn
1097-4199pii
S0896-6273(19)30064-9journal_volume
102pub_type
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