染色体微阵列分析的效率与异常唐氏综合征的胎儿的型化结合,查结果
Huiling Zheng1, Zhi Huang1, Yuquan Li1
1Department of Eugenic Genetics, Guiyang Maternal and Child Health Care Hospital, Guiyang, Guizhou, China.
Fetal and pediatric pathology
|April 22, 2025
概括
染色体微阵列分析 (CMA) 和胆型定型在高风险怀孕中为唐氏综合征 (DS) 提供了高诊断价值. 血清学查仍然至关重要,并没有被无细胞DNA (cfDNA) 查所取代.
科学领域:
- 产前诊断 在产前诊断
- 遗传学 是一个遗传学.
- 生殖健康 生殖健康
背景情况:
- 唐氏综合征 (DS) 的高风险怀孕需要准确的诊断方法.
- 血清学查和无细胞DNA (cfDNA) 查是常见的风险评估工具.
- 与这些查方法相结合的染色体微阵列分析 (CMA) 和胆型定型的诊断产量需要进一步评估.
研究的目的:
- 通过在中国西南地区的血清学和cfDNA查,评估CMA和 karyotyping在被确定为DS高风险胎儿的诊断价值.
主要方法:
- 共有3028名患DS高风险的孕妇接受了CMA和型化.
- 数据分析基于通过血清学查和cfDNA查的初始风险评估.
主要成果:
- 在2830名接受高风险血清学查的妇女中,9.89%的检测结果呈阳性. 型定型证实了51个DS病例,而CMA确定了额外的致病/可能致病拷贝数变异 (p/lpCNVs),与单独的型定型相比,产量增加了13.04%.
- 在227名高风险cfDNA查的女性中,79.74%的测试结果呈阳性,其中179例是DS.
- CMA检测到具有不确定的意义的变异 (VOUS) 和未通过型识别识别的同胞性区域 (ROH).
结论:
- 对DS的血清学查不能被cfDNA查所取代.
- 在高风险怀孕中,CMA与型测定相结合,对DS和其他染色体异常具有显著的诊断价值.
- 这些结合方法应该被推广,以改善产前诊断.
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