在非侵入性产前诊断中,母亲的马赛克主义挑战
Margot Comel1, Marina Lamairia1,2, Odile Boute3
1Institut Universitaire de Recherche Clinique, Montpellier, Occitanie, France.
Prenatal diagnosis
|August 13, 2025
概括
孕产妇的体质马赛克主义可能会干扰单一性疾病 (NIPD-MD) 的非侵入性产前诊断,影响复发风险评估. 早期检测和清晰的沟通对于明智的生殖选择至关重要.
科学领域:
- 遗传学 遗传学 是一个
- 生殖医学 生殖医学
- 分子诊断学 分子诊断学
背景情况:
- 单一性疾病的非侵入性产前诊断 (NIPD-MD) 对于检测胎儿遗传状况至关重要.
- 基于排除的NIPD-MD依赖于检测母体血中的胎儿特异性变体.
- 由于需要父母样本,新发病原体变异对NIPD-MD构成挑战.
研究的目的:
- 报告在NIPD-MD开发期间偶然发现的母体体质马赛克主义.
- 突出母性马赛克主义对基于排斥的NIPD-MD的可行性的影响.
- 强调测试前评估对于准确的遗传咨询的重要性.
主要方法:
- 为四对夫妇开发基于滴滴数字PCR (ddPCR) 的排除NIPD-MD试验.
- 试验设计的重点是检测母体血中的胎儿特异变体.
- 验证涉及父母和试验样本,以及对母亲测序数据的回顾性分析.
主要成果:
- 在测试验证过程中,在70例中的4例 (5.7%) 中检测到母体体质马赛克 (3% - 9%).
- 鉴定到的母体马赛克主义使得NIPD-MD由于等位基因干扰而无法实施.
- 情侣被告知复发风险较高,选择进行侵入性检测或超声波随访.
结论:
- 母亲的马赛克主义对基于排斥的NIPD-MD.具有重大限制.
- 准确识别母亲的马赛克主义对于可靠的复发风险估计至关重要.
- 敏感的检测方法,测试前评估和清晰的沟通对于明智的生殖决策至关重要.
相关概念视频
Meiosis vs. Mitosis
58.2K
Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
58.2K
Nondisjunction
4.1K
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
4.1K


