在基于SNP-Array的PGT-SR中偶然发现了一种罕见的UPD:一个案例报告
Yuanlin Ma1,2,3, Jing Wang1,2,3, Tianrui Wen1,2,3
1Reproductive Medicine Center, The First Affiliated Hospital, Sun Yat-sen University, Zhongshan 2nd Road No. 1, Yuexiu District, 510080, Guangzhou, Guangdong, China.
Reproductive sciences (Thousand Oaks, Calif.)
|May 23, 2024
概括
这项研究报告了第一个细分单亲异构 (UPD) 病例,该病例在染色体22上具有异构和异构. 这一罕见的发现,在一对相互转位的夫妇强调了需要先进的遗传分析在植入前遗传查.
科学领域:
- 生殖遗传学 生殖遗传学
- 人类遗传学 人类遗传学
- 基因组印记是指基因组的印记.
背景情况:
- 单亲异种 (UPD),其中两个染色体同类来自一个父母,是罕见的,通常与印记障碍有关.
- 分段性UPD,特别是在异构和异构组合的情况下,非常罕见.
- 对于染色体转位的夫妇来说,结构重组的植入前遗传测试 (PGT-SR) 是至关重要的.
研究的目的:
- 报告一个新的细分UPD病例与组合的异构体和异构体.
- 调查一对接受结构重组 (PGT-SR) 的植入前遗传测试的夫妇的遗传影响.
- 强调在PGT-SR.中先进基因分析的重要性.
主要方法:
- 进行PGT-SR的互换转位载体对.
- 使用B等位基频率检测异构性 (LOH) 损失的样本化胚胎囊的分析.
- 哈普洛型分析以确定UPD的类型.
- 使用UPDtool软件进行确认.
主要成果:
- 在染色体22上鉴定出一个带有细分UPD的欧平质囊,具体是chr22q12.1-q22.3.3.
- 该UPD包括母体异构体 (UPI) 和母体异构体 (UPD).
- 细分UPD与父母互换转位共享了一个断点 (chr22q12.1).
结论:
- 这是第一个报告的细分UPD病例,具有异构体和异构体的组合,可能是由于积体救援引起的.
- 综合性染色体查与哈普洛型分析相结合,对于准确诊断和减少PGT-SR.错误诊断风险至关重要.
- 这些发现强调了染色体异常的复杂性和详细遗传评估的必要性.
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