Brpf1 Haploinsufficiency Impairs Dendritic Arborization and Spine Formation, Leading to Cognitive Deficits

Brpf1 Haploinsufficiency Impairs Dendritic Arborization and Spine Formation, Leading to Cognitive Deficits
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Brpf1 单倍体不足会损害树突分枝和脊柱形成,导致认知缺陷

DOI:
10.3389/fncel.2019.00249
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发表时间:
2019-06
影响因子:
5.3
通讯作者:
Chunjie Zhao
Chunjie Zhao
中科院分区:
医学2区
文献类型:
--
作者:
Yan Su;Junhua Liu;Baocong Yu;Ru Ba;Chunjie Zhao

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含溴结构域和PHD指蛋白1(BRPF 1)基因的单倍不足导致智力残疾(ID),其特征在于智力和认知功能受损;然而,ID的神经学基础和BRPF 1剂量在大脑中的神经学功能仍不清楚。在这里,通过交叉Emx 1-cre小鼠与Brpf 1fl/fl小鼠,我们产生Brpf 1杂合子小鼠模型BRPF 1相关的ID。Brpf 1杂合子表现出减少树突复杂性在海马颗粒细胞和皮质锥体神经元,伴随着减少棘密度和改变脊柱和突触形态。Brpf 1单倍不足的体外研究也表明,微型EPSC的频率和幅度降低,随后可能导致异常行为,包括焦虑水平降低和学习记忆缺陷。我们的研究结果表明Brpf 1剂量在神经元树突分支,脊柱形态发生和行为中起着关键作用,并为BRPF 1相关ID的发病机制提供了见解。
Haploinsufficiency of the bromodomain and PHD finger-containing protein 1 (BRPF1) gene causes intellectual disability (ID), which is characterized by impaired intellectual and cognitive function; however, the neurological basis for ID and the neurological function of BRPF1 dosage in the brain remain unclear. Here, by crossing Emx1-cre mice with Brpf1fl/fl mice, we generated Brpf1 heterozygous mice to model BRPF1-related ID. Brpf1 heterozygotes showed reduced dendritic complexity in both hippocampal granule cells and cortical pyramidal neurons, accompanied by reduced spine density and altered spine and synapse morphology. An in vitro study of Brpf1 haploinsufficiency also demonstrated decreased frequency and amplitude of miniature EPSCs that may subsequently contribute to abnormal behaviors, including decreased anxiety levels and defective learning and memory. Our results demonstrate a critical role for Brpf1 dosage in neuron dendrite arborization, spine morphogenesis and behavior and provide insight into the pathogenesis of BRPF1-related ID.
DOI: 10.1083/jcb.2.4.193
发表时间: 1956-07-25
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