A Missense Variant at the Nrxn3 Locus Enhances Empathy Fear in the Mouse

被引：66

作者：

Keum, Sehoon ^{[1
]}

Kim, Arie ^{[1
,2
]}

Shin, Jae Jin ^{[1
,3
]}

Kim, Jong-Hyun ^{[1
,4
]}

Park, Joomin ^{[1
,2
]}

Shin, Hee-Sup ^{[1
,2
]}

机构：

[1] Ctr Cognit & Social, Inst Basic Sci, Daejeon 34047, South Korea

[2] Univ Sci & Technol, Sch Basic Sci, Daejeon 34113, South Korea

[3] Seoul Natl Univ, Dept Brain & Cognit Sci, Seoul 08826, South Korea

[4] Korea Inst Sci & Technol, Brain Sci Inst, Ctr Glia Neuron Interact, Seoul 02792, South Korea

来源：

NEURON | 2018年 / 98卷 / 03期

关键词：

GABAERGIC NEURONS; PRESYNAPTIC NEUREXIN-3; DENDRITIC INHIBITION; GENETIC-VARIATION; AUTISM; PAIN; INTERNEURONS; REVEALS; CONNECTIVITY; TRANSMISSION;

D O I：

10.1016/j.neuron.2018.03.041

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Empathy is crucial for our emotional experience and social interactions, and its abnormalities manifest in various psychiatric disorders. Observational fear is a useful behavioral paradigm for assessing affective empathy in rodents. However, specific genes that regulate observational fear remain unknown. Here we showed that 129S1/SvImJ mice carrying a unique missense variant in neurexin 3 (Nrxn3) exhibited a profound and selective enhancement in observational fear. Using the CRISPR/Cas9 system, the arginine-to-tryptophan (R498W) change in Nrxn3 was confirmed to be the causative variant. Selective deletion of Nrxn3 in somatostatin-expressing (SST+) interneurons in the anterior cingulate cortex (ACC) markedly increased observational fear and impaired inhibitory synaptic transmission from SST+ neurons. Concordantly, optogenetic manipulation revealed that SST+ neurons in the ACC bidirectionally controlled the degree of socially transmitted fear. Together, these results provide insights into the genetic basis of behavioral variability and the neurophysiological mechanism controlling empathy in mammalian brains.

引用

页码：588 / +

页数：19

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