美国纽约大学格罗斯曼医学院Dayu Lin和Bing Dai共同合作,近期取得重要工作进展。他们研究提出经验依赖性多巴胺对雄性攻击行为的调节机理。相关研究成果2025年1月22日在线发表于《自然》杂志上。
据介绍,众多研究都证实了多巴胺在调节攻击行为中发挥着作用,但具体的神经机制仍不明确。
研究人员发现,腹侧被盖区(VTA)的多巴胺能神经元能够以一种依赖经验的方式双向调节雄性小鼠的攻击行为。对于初次表现出攻击行为的小鼠而言,VTA的多巴胺能神经元对其攻击行为有强烈的影响,但对于有攻击经验的小鼠,这些神经元则不再起作用。
此外,抑制VTA中多巴胺的合成会阻止无攻击经验小鼠出现攻击行为,但对有攻击经验的小鼠的攻击行为没有影响。VTA中的多巴胺通过背外侧隔核(dLS)来调节攻击行为,dLS是一个已知的与攻击行为控制相关的脑区。在初次表现出攻击行为的小鼠中,多巴胺通过减弱dLS局部的抑制作用,使信息能够从海马体传递至dLS。而在有攻击经验的小鼠中,dLS的局部抑制作用自然减弱,多巴胺调节dLS神经元的能力也随之降低。
总之,这一研究揭示了多巴胺在成年雄性小鼠攻击行为产生过程中所起的复杂作用。
附:英文原文
Title: Experience-dependent dopamine modulation of male aggression
Author: Dai, Bing, Zheng, Bingqin, Dai, Xiuzhi, Cui, Xiaoyang, Yin, Luping, Cai, Jing, Zhuo, Yizhou, Tritsch, Nicolas X., Zweifel, Larry S., Li, Yulong, Lin, Dayu
Issue&Volume: 2025-01-22
Abstract: Numerous studies support the role of dopamine in modulating aggression1,2, but the exact neural mechanisms remain elusive. Here we show that dopaminergic cells in the ventral tegmental area (VTA) can bidirectionally modulate aggression in male mice in an experience-dependent manner. Although VTA dopaminergic cells strongly influence aggression in novice aggressors, they become ineffective in expert aggressors. Furthermore, eliminating dopamine synthesis in the VTA prevents the emergence of aggression in naive mice but leaves aggression intact in expert aggressors. VTA dopamine modulates aggression through the dorsal lateral septum (dLS), a region known for aggression control. Dopamine enables the flow of information from the hippocampus to the dLS by weakening local inhibition in novice aggressors. In expert aggressors, dLS local inhibition naturally weakens, and the ability of dopamine to modulate dLS cells diminishes. Overall, these results reveal a sophisticated role of dopamine in the rise of aggression in adult male mice.
DOI: 10.1038/s41586-024-08459-w
Source: https://www.nature.com/articles/s41586-024-08459-w
Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:69.504
官方网址:http://www.nature.com/
投稿链接:http://www.nature.com/authors/submit_manuscript.html