检验医学 ›› 2023, Vol. 38 ›› Issue (6): 553-558.DOI: 10.3969/j.issn.1673-8640.2023.06.009

• 论著 • 上一篇    下一篇

5 696例孕妇拓展性无创产前基因检测结果

张楚, 王建红(), 李瑞, 肖艳华, 王恒, 张品肖, 徐凝馨, 夏半半   

  1. 焦作市妇幼保健院医学遗传与产前诊断科 焦作市产前诊断医学重点实验室,河南 焦作 454000
  • 收稿日期:2022-04-04 修回日期:2022-08-03 出版日期:2023-06-30 发布日期:2023-08-22
  • 通讯作者: 王建红,E-mail:wangjianhongl@163.com
  • 作者简介:张 楚,女,1990年生,硕士,检验师,主要从事分子遗传学研究。
  • 基金资助:
    河南省医学科技攻关计划联合共建项目(LHGJ20191365)

Results of non-invasive prenatal testing-plus in 5 696 pregnant women

ZHANG Chu, WANG Jianhong(), LI Rui, XIAO Yanhua, WANG Heng, ZHANG Pinxiao, XU Ningxin, XIA Banban   

  1. Genetic and Prenatal Diagnosis Center,Maternal and Child Health Hospital of Jiaozuo,Key Laboratory of Prenatal Diagnosis Medicine of Jiaozuo,Jiaozuo 454000,Henan,China
  • Received:2022-04-04 Revised:2022-08-03 Online:2023-06-30 Published:2023-08-22

摘要:

目的 探讨拓展性无创产前基因检测(NIPT-plus)在产前筛查中的应用价值。方法 选取2019年12月—2021年6月在焦作市妇幼保健院进行NIPT-plus检测的孕妇5 696名,对其NIPT-plus结果、介入性产前诊断结果和随访结果进行回顾性分析,了解NIPT-plus染色体非整倍体和拷贝数变异(CNV)等胎儿染色体异常检出情况。结果 5 696名孕妇中,检测成功5 685名,NIPT-plus高风险总检出率为2.60%(148/5 685)。以介入性产前诊断结果为标准,NIPT-plus对21-三体综合征和18-三体综合征的阳性预测值(65.22%、66.67%)高于性染色体异常高风险(25.00%)和染色体微缺失/微重复(26.83%)。NIPT-plus提示染色体微缺失、微重复与介入性产前诊断结果的符合率分别为43.75%(7/16)、40.00%(10/25);染色体微缺失孕妇的妊娠终止率高于染色体微重复孕妇。结论 NIPT-plus筛查21-三体综合征、18-三体综合征的阳性预测值较高,对性染色体异常和CNV的阳性预测值相对较低,其结果需结合介入性产前诊断进行分析。对产前诊断确定的CNV必要时应追溯其亲代起源,为孕妇提供正确的遗传咨询。

关键词: 拓展性无创产前基因检测, 产前筛查, 染色体, 拷贝数变异, 产前诊断

Abstract:

Objective To investigate the value of non-invasive prenatal testing-plus(NIPT-plus) in prenatal screening. Methods The results of NIPT-plus,interventional prenatal diagnosis and follow-up outcome in 5 696 pregnant women in Maternal and Child Health Hospital of Jiaozuo from December 2019 to June 2021 were analyzed to study the status of NIPT-plus on detecting chromosome aneuploidy and copy number variation(CNV). Results Totally,5 685 cases were determined among the 5 696 pregnant women,and the determination rate of high-risk in chromosomal abnormality was 2.60%(148/5 685) by NIPT-plus. NIPT-plus had higher positive predictive values on 21-trisomy and 18-trisomy(65.22% and 66.67%) than sex chromosome abnormality high-risk(25.00%)and chromosome microdeletions/microduplications(26.83%). The consistency rates of the results of microdeletions and microduplications in NIPT-plus and prenatal diagnosis were 43.75%(7/16)and 40.00%(10/25),respectively. The rate of pregnancy termination in microdeletion pregnant women was higher than that in microduplication pregnant women. Conclusions NIPT-plus has high positive predictive value in screening 21-trisomy and 18-trisomy. There is a low positive predictive value for sex chromosome abnormality and CNV by NIPT-plus. It is necessary to combine the results of interventional prenatal diagnosis. When necessary,CNV diagnosed by prenatal diagnosis should verify the source in order to provide correct genetic counseling for pregnant women.

Key words: Non-invasive prenatal testing-plus, Prenatal screening, Chromosome, Copy number variation, Prenatal diagnosis

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