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皮层 FoxP1 敲低对雌性斑马雀习得歌曲偏爱的影响。

Effects of Cortical FoxP1 Knockdowns on Learned Song Preference in Female Zebra Finches.

机构信息

Institute of Biology, Leiden University, Leiden 2333BE, The Netherlands

Language and Genetics Department, Max Planck Institute for Psycholinguistics, Nijmegen 6525XD, The Netherlands.

出版信息

eNeuro. 2023 Mar 29;10(3). doi: 10.1523/ENEURO.0328-22.2023. Print 2023 Mar.

Abstract

The search for molecular underpinnings of human vocal communication has focused on genes encoding forkhead-box transcription factors, as rare disruptions of FOXP1, FOXP2, and FOXP4 have been linked to disorders involving speech and language deficits. In male songbirds, an animal model for vocal learning, experimentally altered expression levels of these transcription factors impair song production learning. The relative contributions of auditory processing, motor function or auditory-motor integration to the deficits observed after different FoxP manipulations in songbirds are unknown. To examine the potential effects on auditory learning and development, we focused on female zebra finches () that do not sing but develop song memories, which can be assayed in operant preference tests. We tested whether the relatively high levels of expression in forebrain areas implicated in female song preference learning are crucial for the development and/or maintenance of this behavior. Juvenile and adult female zebra finches received FoxP1 knockdowns targeted to HVC (proper name) or to the caudomedial mesopallium (CMM). Irrespective of target site and whether the knockdown took place before (juveniles) or after (adults) the sensitive phase for song memorization, all groups preferred their tutor's song. However, adult females with FoxP1 knockdowns targeted at HVC showed weaker motivation to hear song and weaker song preferences than sham-treated controls, while no such differences were observed after knockdowns in CMM or in juveniles. In summary, FoxP1 knockdowns in the cortical song nucleus HVC were not associated with impaired tutor song memory but reduced motivation to actively request tutor songs.

摘要

人类言语交流的分子基础研究主要集中在编码叉头框转录因子的基因上,因为 FOXP1、FOXP2 和 FOXP4 的罕见突变与涉及言语和语言缺陷的疾病有关。在雄性鸣禽(一种用于言语学习的动物模型)中,这些转录因子的表达水平的实验改变会损害歌曲产生学习。在鸣禽中,不同 FoxP 操作后观察到的缺陷与听觉处理、运动功能或听觉-运动整合的相对贡献尚不清楚。为了研究听觉学习和发育的潜在影响,我们专注于不唱歌但发展出歌曲记忆的雌性斑马雀(),可以通过操作性偏好测试来检测。我们测试了在与女性歌曲偏好学习相关的大脑前区域中高表达的 FoxP1 是否对这种行为的发展和/或维持至关重要。幼鸟和成年雌性斑马雀接受了靶向 HVC(专有名称)或尾侧中脑间质(CMM)的 FoxP1 敲低。无论目标部位以及敲低是在(幼鸟)还是在(成年)记忆歌曲的敏感阶段之前进行,所有组都更喜欢它们导师的歌曲。然而,与假处理对照相比,靶向 HVC 的 FoxP1 敲低的成年雌性表现出较弱的听歌曲动机和较弱的歌曲偏好,而在 CMM 或幼鸟中则没有观察到这种差异。总之,HVC 皮质歌曲核中的 FoxP1 敲低与受损的导师歌曲记忆无关,但降低了主动要求导师歌曲的动机。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f4b/10062489/493799dfbd64/ENEURO.0328-22.2023_f001.jpg

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