在产前诊断中评估染色体马赛克主义:染色体微阵列分析和型定型的互补作用
Chenxia Xu1, Yi Xiong1, Degang Wang1
1Prenatal Diagnosis Center, Boai Hospital of Zhongshan, ZhongShan, China.
Journal of clinical laboratory analysis
|January 21, 2025
概括
子培养产前细胞可以影响遗传测试结果. 染色体微阵列分析 (CMA) 和胆型定型提供了对染色体马赛克的补充检测,提高了诊断的准确性.
科学领域:
- 产前诊断 在产前诊断
- 细胞遗传学 细胞遗传学
- 基因组分析 基因组分析
背景情况:
- 实验室细胞亚培养是产前诊断测试中的标准步骤.
- 亚文化对检测染色体异常,特别是马赛克的潜在影响需要进一步调查.
- 传统的型定型和染色体微阵列分析 (CMA) 是产前遗传评估的关键方法.
研究的目的:
- 评估体外细胞亚培养如何影响产前诊断结果.
- 为了比较kariyotyping和CMA在识别染色体马赛克的有效性.
- 在产前样本中评估卡略型和CMA之间的诊断差异.
主要方法:
- 回溯分析G-banding karyotyping和CMA数据.
- 包括2007年的羊水切割病例.
- 调查重点是染色体马赛克的检测率和一致性.
主要成果:
- 在1.49% (30/2007) 的病例中发现了染色体马赛克,性染色体马赛克是最常见的.
- 18个案例显示了卡里奥类型和CMA之间一致的马赛克主义结果.
- 观察到显著的差异:CMA检测到4个正常型的案例中的马赛克主义,而型测试在8个正常CMA结果的案例中表明了马赛克主义.
结论:
- 型化和CMA是产前遗传诊断中的互补技术.
- 结合这两种方法可以提高检测染色体马赛克的准确性.
- 在 karyotyping 中附着细胞的亚培养可能导致对马赛克主义的低估或错过检测.
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