不活跃的X染色体作为女性保护者在自闭症和超越
Maya Talukdar1,2, David C Page1,3,4
1Whitehead Institute, Cambridge, MA, USA.
Research square
|September 18, 2025
概括
女性需要更高的自闭症遗传风险,由于不活跃的X染色体 (Xi) 的缓冲效应,与男性的Y染色体不同. 这解释了自闭症和其他男性偏见的疾病中的性别差异.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 人类生物学 人类生物学
背景情况:
- 自闭症和其他童年障碍在男性中患病率更高.
- 这些男性偏向疾病的遗传基础涉及自体遗传性.
- 现有的研究并不能完全解释观察到的疾病表现中的性别差异.
研究的目的:
- 提出一个新的框架,解释为什么女性患自闭症和其他男性偏见障碍的门更高.
- 调查不活跃的X染色体 (Xi) 和Y染色体在减轻这些疾病的遗传风险中的作用.
主要方法:
- 对101项关于男性偏见儿童疾病的遗传研究进行系统审查.
- 对与自闭症和性别差异相关的流行病学,遗传学和机制学数据的分析.
- 来自非活性X染色体 (Xi) 和Y染色体的基因表达的比较分析.
主要成果:
- 女性对自闭症和其他男性偏见的疾病的责任门较高.
- 来自不活跃的X染色体 (Xi) 的基因表达似乎缓冲了女性有害的自体变异.
- Y染色体在减轻自体遗传风险方面不如Xi有效,有助于男性易感性.
- 确定了16种其他童年障碍,这些障碍表明女性的保护作用 (FPE).
结论:
- 不活跃的X染色体 (Xi) 在缓冲遗传风险方面发挥着至关重要的作用,解释了女性在儿科条件下对自体变异的更高耐受性.
- Y染色体的缓冲能力有限,导致某些疾病的男性偏差.
- 这一框架为疾病易感性和性染色体的遗传贡献的性别差异提供了新的视角.
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