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在丸激素下唱歌的雌性金丝雀中不变的HVC大小:通过神经分化解锁功能,而不是生长

Shouwen Ma¹, Carolina Frankl-Vilches¹, Manfred Gahr¹

¹Department of Behavioural Neurobiology, Max Planck Institute for Biological Intelligence, Seewiesen 82319, Germany.

Proceedings of the National Academy of Sciences of the United States of America

|October 20, 2025

概括

激素通过改变HVC (高声中心) 内的基因网络来诱导雌性金丝雀的歌声,而不是通过改变它的尺寸. 这揭示了成年歌鸟行为可塑性的神经机制.

科学领域:

神经科学是一个神经科学.
行为内分泌学行为内分泌学
鸟类生物学鸟类生物学

背景情况:

在金雀中,歌曲控制核HVC (高声中心) 是声乐学习和生产的关键区域.
据认为,HVC在由丸激素驱动的从不唱歌状态过渡到唱歌状态时显著扩大.
了解行为可塑性的神经基础对于脊椎动物神经科学至关重要.

研究的目的:

为了研究成年雌性金丝雀的HVC结构和分子变化后,丸激素的管理.
为了确定在丸激素诱导的歌曲发育过程中,HVC的大小是否发生变化,或者是否涉及其他机制.
阐明基因表达在成人大脑中调解行为可塑性的作用.

主要方法:

使用2光子体内成像,在几周内跟踪神经元分布和HVC中的特性.
给成年雌性金丝雀注射丸激素以诱导唱歌行为.
采用空间转录学来分析HVC中的基因表达模式.

主要成果:

丸激素的使用诱导了雌性金丝雀的唱歌行为.
尽管观察到HVC神经元的超结构变化,但神经元间距和整体HVC大小保持不变.
空间转录组学揭示了整个HVC的丸激素调节的基因网络,使歌唱鸟类的区域转录组形状保持一致.
这些分子变化模仿了扩大HVC的组织外观,而没有实际增加大小.

结论:

成年歌鸟的HVC大小变化反映了稳定的解剖框架内的神经元表型变化,而不是结构扩大.
不唱歌状态不涉及减少大脑区域体积,保持HVC终身功能差异化能力.
这项研究提供了新的洞察力,了解了成人脊椎动物大脑中行为可塑性和基因调节的基础神经机制.

关键词:

大脑大脑大脑的大脑大脑在体内成像的 in-vivo 成像.塑性的可塑性塑性歌唱的鸟歌唱的鸟测试剂测试剂测试剂测试剂

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