微删除和微复制选在植入前遗传测试中的应用:一个案例报告
Maria Katz1, Ben Podgursky1, Shenglai Li1
1Orchid Health, Palo Alto, CA, 94301, USA.
Journal of medical case reports
|January 22, 2026
概括
植入前遗传测试-全基因组测序 (PGT-WGS) 成功识别了传统方法错过的微删除和微重复. 这种先进的PGT-WGS技术可以更好地检测临床上显著的染色体异常,从而实现更好的计划生育.
科学领域:
- 生殖遗传学 生殖遗传学
- 基因组医学是一种基因组医学.
- 在体外受精技术在体外受精技术.
背景情况:
- 微切除和微重复是具有重大临床影响的亚微观染色体变异.
- 传统的植入前遗传检测 (PGT-A) 缺乏检测这些小异常的分辨率,这可能导致发育延迟和先天异常.
- 这些临床相关的变异常常被标准形查方法遗漏.
研究的目的:
- 介绍两个案例,证明了植入前遗传测试-全基因组测序 (PGT-WGS) 用于识别微切除和微重复的成功应用.
- 与传统的PGT方法相比,强调PGT-WGS的增强诊断能力.
- 展示PGT-WGS作为寻求在体外受精 (IVF) 期间全面基因查的夫妇的可行选择.
主要方法:
- 两对接受试管婴儿的夫妇使用了PGT-WGS进行全面的染色体查.
- 案例1涉及对50个致病性微删除/重复区域的选,确定了Xp22.31的1.7Mb微重复.
- 案例2侧重于10号染色体上的412kb de novo重复,该染色体使用PGT-WGS成功准和分析.
主要成果:
- 在案例1中,PGT-WGS成功地确定了Xp22.31的1.7Mb微复制,这与女性患者的发作有关.
- 在案例2中,PGT-WGS使得在染色体10上检测到412kb的de novo重复,从而允许选择未受影响的胚胎.
- 该研究表明,PGT-WGS能够检测出小的,临床上显著的染色体异常,这些异常通常会被传统的PGT遗漏.
结论:
- 与传统的PGT相比,PGT-WGS提供了更高的染色体分辨率,可以更广泛地查微切除和微重复.
- 这种先进的技术允许检测复杂的染色体变异,为遗传问题伴侣提供新的计划生育解决方案.
- PGT-WGS扩大了试管婴儿期间可用的基因测试范围,赋予患者更全面的查选择.
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