Stress Accelerates Defensive Responses to Looming in Mice and Involves a Locus Coeruleus-Superior Colliculus Projection

	Stress Accelerates Defensive Responses to Looming in Mice and Involves a Locus Coeruleus-Superior Colliculus Projection
	Qingning Yang; Lei Li; Xiaolong Feng; Zheng Zhou; Huiqi Zhang; Qianqian Shi; Zhuogui Lei; Peilei Shen; Binghao Zhao; Shuran Chen
刊名	Current Biology
	2018
文献子类	期刊论文
英文摘要	Defensive responses to threatening stimuli are crucial to the survival of species. While expression of these responses is considered to be instinctive and unconditional, their magnitude may be affected by environmental and internal factors. The neural circuits underlying this modulation are still largely unknown. In mice, looming-evoked defensive responses are mediated by the superior colliculus (SC), a subcortical sensorimotor integration center. We found that repeated stress caused an anxiety-like state in mice and accelerated defensive responses to looming. Stress also induced c-fos activation in locus coeruleus (LC) TH+ neurons and modified adrenergic receptor expression in SC, suggesting a possible Th::LC-SC projection that may be involved in the accelerated defensive responses. Indeed, both anterograde and retrograde neural tracing confirmed the anatomical Th::LC-SC projection and that the SC-projecting TH+ neurons in LC were activated by repeated stress. Optogenetic stimulation of either LC TH+ neurons or the Th::LC-SC fibers also caused anxiety-like behaviors and accelerated defensive responses to looming. Meanwhile, chemogenetic inhibition of LC TH+ neurons and the infusion of an adrenergic receptor antagonist in SC abolished the enhanced looming defensive responses after repeated stress, confirming the necessity of this pathway. Furthermore, antro-transsynaptic tracing identified lateral posterior thalamic nucleus (LP) and the parabigeminal nucleus (PBGN) as downstream targets of the LC-SC pathway. These findings suggest that the Th::LC-SC pathway plays a key role in the sophisticated adjustments of defensive behaviors induced by changes in physiological states.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/13863]
专题	深圳先进技术研究院_脑所
推荐引用方式 GB/T 7714	Qingning Yang,Lei Li,Xiaolong Feng,et al. Stress Accelerates Defensive Responses to Looming in Mice and Involves a Locus Coeruleus-Superior Colliculus Projection[J]. Current Biology,2018.
APA	Qingning Yang.,Lei Li.,Xiaolong Feng.,Zheng Zhou.,Huiqi Zhang.,...&Liping Wang.(2018).Stress Accelerates Defensive Responses to Looming in Mice and Involves a Locus Coeruleus-Superior Colliculus Projection.Current Biology.
MLA	Qingning Yang,et al."Stress Accelerates Defensive Responses to Looming in Mice and Involves a Locus Coeruleus-Superior Colliculus Projection".Current Biology (2018).