Hippocampal oxytocin receptors are necessary for discrimination of social stimuli.

Hippocampal oxytocin receptors are necessary for discrimination of social stimuli.
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DOI:
10.1038/s41467-017-02173-0
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发表时间:
2017-12-08
影响因子:
16.6
通讯作者:
Sahay A
Sahay A
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Raam T;McAvoy KM;Besnard A;Veenema AH;Sahay A

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催产素受体(Oxtr)在神经回路中介导的社会刺激和亲和或回避行为的歧视信号被认为是指导社会识别。值得注意的是,海马中Oxtrs的生理功能尚不清楚。在这里,我们证明使用遗传和药理学的方法,Oxtrs在前齿状回(aDG)和前CA 2/CA 3(aCA 2/CA 3)的小鼠是必要的社会,但不是非社会,刺激的歧视。此外,aCA 2/CA 3神经元中的Oxtrs招募基于群体的编码机制来介导社会刺激辨别。光遗传末端特异性衰减揭示了aCA 2/CA 3输出到后CA 1的关键作用,用于区分社会刺激。相比之下,aCA 2/CA 3对aCA 1的投射介导了对非社会刺激的辨别。这些研究鉴定了Oxtr表达细胞的aDG-CA 2/CA 3轴在辨别社会刺激中的作用,并描绘了将前海马体中的社会记忆计算中继到后海马体以指导社会识别的途径。虽然催产素被认为是社会认可的关键,但海马体中催产素受体(Oxtrs)的功能尚不清楚。这项研究表明,Oxtrs在前齿状回和CA 2/CA 3锥体细胞招募群体为基础的编码介导的社会刺激的歧视。
Oxytocin receptor (Oxtr) signaling in neural circuits mediating discrimination of social stimuli and affiliation or avoidance behavior is thought to guide social recognition. Remarkably, the physiological functions of Oxtrs in the hippocampus are not known. Here we demonstrate using genetic and pharmacological approaches that Oxtrs in the anterior dentate gyrus (aDG) and anterior CA2/CA3 (aCA2/CA3) of mice are necessary for discrimination of social, but not non-social, stimuli. Further, Oxtrs in aCA2/CA3 neurons recruit a population-based coding mechanism to mediate social stimuli discrimination. Optogenetic terminal-specific attenuation revealed a critical role for aCA2/CA3 outputs to posterior CA1 for discrimination of social stimuli. In contrast, aCA2/CA3 projections to aCA1 mediate discrimination of non-social stimuli. These studies identify a role for an aDG-CA2/CA3 axis of Oxtr expressing cells in discrimination of social stimuli and delineate a pathway relaying social memory computations in the anterior hippocampus to the posterior hippocampus to guide social recognition. While oxytocin is known to be critical for social recognition, the functions of oxytocin receptors (Oxtrs) in the hippocampus are not known. This study shows that Oxtrs in anterior dentate gyrus and CA2/CA3 pyramidal cells recruit population-based coding to mediate discrimination of social stimuli.
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