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在C57BL6小鼠中,CHD8成年微质倒退诱导了行为,形态和转录变化,以性别依赖的方式
Orly Weissberg1, Ram Harari1, Chizim Dogun1
1Azrieli Faculty of Medicine, Bar Ilan University, Safed, Israel.
Translational psychiatry
|July 17, 2025
概括
染色体-酶-DNA结合蛋白8 (CHD8) 对于成人微质功能至关重要. 它在小鼠中被删除会导致行为变化,特别是在男性中,突出了自闭症谱系障碍中性别特异性的作用.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- CHD8中的突变与自闭症谱系障碍 (ASD) 有关.
- CHD8因其在神经元发育中的作用而闻名,但其在成年微质细胞中的功能知之甚少.
- 微质功能障碍与ASD有关,但ASD相关基因在微质功能中的作用尚不清楚.
研究的目的:
- 研究CHD8在成人微质功能中的作用.
- 检查成年微质CHD8缺失的行为和分子后果.
- 探索CHD8删除在微质和神经元中的潜在的性别特异性影响.
主要方法:
- 在成年C57BL6小鼠的微质和神经元中,Chd8的有条件淘汰.
- 行为测试用于评估焦虑,社交互动和类似抑郁症的行为.
- 全脑基因表达分析,包括细胞因子分析.
- 河马基因表达分析专注于特定的信号通路.
主要成果:
- 成年微质Chd8缺失在小鼠中诱导了显著的行为变化 (焦虑,社会缺陷,类似抑郁症的行为).
- 这些行为变化与改变的微质激活和基因表达有关,包括细胞因子.
- 许多观察到的效应是特定于雄性小鼠,在雌性小鼠中效应较少.
- 神经元Chd8敲击具有更微妙的行为效应,主要是男性的抑郁症类行为.
- 神经元的淘汰导致男性海马体中刺和Wnt/Beta-catenin通路基因的上调.
结论:
- CHD8在维持成人微质功能方面发挥着至关重要的作用.
- 成年微质CHD8缺乏导致行为缺陷和分子变化,具有显著的性别特异性差异.
- 这些发现表明CHD8在与ASD相关的微质生物学中的重要性,特别是在男性中.
相关概念视频
Sex-linked Disorders
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Dosage Compensation
In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will have...

