由双基KDM4B框架转移变体引起的人类表型.
Sanami Takada1, Sebastián Silva2,3, Ivonne Zamorano4
1Department of Human Genetics, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan.
Clinical genetics
|August 1, 2023
概括
以前被认为是致命的 homozygous KDM4B 变种,在女性人类中可能是可行的,呈现出发育延迟. 这一发现扩大了对KDM4B相关智力障碍的理解.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 人类疾病 人类疾病
背景情况:
- KDM4B (氨酸脱甲基酶4B) 编码了一个调节基因表达的基因脱甲基酶.
- 在KDM4B中功能丧失的变体会导致自体主导智力发育障碍 65.
- 在此之前,只报告了异质合体KDM4B变体,没有双变体的病例.
研究的目的:
- 报告患有双基KDM4B病原体变异的患者的第一个病例.
- 在人类中调查同卵性KDM4B变体的表型后果.
- 为了比较一个同卵性患者与她的异卵性母亲的表型.
主要方法:
- 一个女性患者和她的异卵性母亲的临床评估.
- 基因分析以确定KDM4B变体.
- 对KDM4B变体和相关疾病的现有文献的审查.
主要成果:
- 一名女性患者呈现了一种双基KDM4B框架转移变体 (c.1384_1394delinsGGG, p.
- 患者表现出发育和语言延迟,低血压,以及特有的面部外观.
- 这位患者的表型比异质合体母亲的表型更为严重,这表明同质合体变异在女性中是可行的.
结论:
- 同卵性KDM4B框架转移变体在人类中可能是可行的,特别是在女性中.
- 这一案例扩大了已知的KDM4B相关疾病的范围,并挑战了关于同卵性状态中胚胎死亡率的先前假设.
- 需要进一步的研究,以了解双基KDM4B变体的全部含义.
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