国际生殖健康/计划生育 ›› 2022, Vol. 41 ›› Issue (5): 365-369.doi: 10.12280/gjszjk.20220103

• 论著 • 上一篇    下一篇

染色体微阵列分析技术在马蹄足内翻胎儿中的应用价值

罗晓辉, 周伟宁, 李怡, 任丛勉, 黄演林, 卢建()   

  1. 511400 广州,广东省妇幼保健院医学遗传中心,广东省妇幼代谢与遗传病重点实验室
  • 收稿日期:2022-02-24 出版日期:2022-09-15 发布日期:2022-10-12
  • 通讯作者: 卢建 E-mail:243561205@qq.com

Clinical Application of Chromosome Microarray Analysis in Fetuses with Talipes Equinovarus

LUO Xiao-hui, ZHOU Wei-ning, LI Yi, REN Cong-mian, HUANG Yan-lin, LU Jian()   

  1. Medical Genetics Center, Guangdong Women and Children′s Hospital and Health Institute, Maternal and Children Metabolic-Genetic Key Laboratory, Guangzhou 511400, China
  • Received:2022-02-24 Published:2022-09-15 Online:2022-10-12
  • Contact: LU Jian E-mail:243561205@qq.com

摘要:

目的:探讨染色体微阵列分析(chromosome microarray analysis,CMA)技术在马蹄足内翻(talipes equinovarus,TE)胎儿中的临床应用价值。方法:收集本中心2016年1月—2020年7月共157例经超声提示为TE并接受CMA检测的胎儿的临床数据,分为孤立性TE组(107例)和复杂性TE组(50例),分析各组TE胎儿中染色体变异检出情况;分析TE胎儿中有临床意义的拷贝数变异(copy number variation,CNV)的风险相较于低风险妊娠(超声无异常、高龄/焦虑)队列是否存在富集。结果:①TE胎儿有临床意义的染色体变异总阳性率为10.19%(16/157),非整倍体阳性率为5.73%(9/157),CNV阳性率为6.37%(10/157),其中有临床意义的CNV阳性率为4.46%(7/157),孤立性TE组与复杂性TE组中有临床意义的染色体变异阳性率、染色体非整倍体阳性率、有临床意义的CNV阳性率相比,差异均无统计学意义(P>0.05)。②TE胎儿中有临床意义的CNV总阳性率、孤立性TE组有临床意义的CNV阳性率均显著高于低风险妊娠人群(P<0.05),复杂性TE组有临床意义的CNV阳性率与低风险妊娠队列相比差异无统计学意义(P>0.05)。结论:TE胎儿中有临床意义的CNV发生风险显著高于低风险妊娠人群,CMA技术在TE胎儿中可以提高约6%(10/157)的CNV检出率,CMA在检测TE胎儿染色体微缺失/微重复具有重要的临床价值。

关键词: 马蹄足内翻, 胎儿, 染色体, DNA拷贝数变异, 非整倍性, 产前诊断, 超声检查, 染色体微阵列分析

Abstract:

Objective: To evaluate the clinical value of chromosome microarray analysis (CMA) in the fetuses with talipes equinovarus (TE). Methods: We retrospectively collected the clinic data of 157 cases of TE fetuses from January 2016 to July 2020 who were diagnosed by ultrasound and tested by CMA. The fetuses were then divided into two groups as the isolated TE group (107 cases) and the complex TE group (50 cases). The positive rate of chromosomal variations in each group was analyzed. The positive rates of clinically significant copy number variation (CNV) of the two groups were compared with the risk ratio of low-risk pregnancy cohorts, to analyze whether the risk was enriched in TE fetuses. Results: ①The total positive rate of clinically significant chromosomal variations of TE fetuses was 10.19% (16/157), the positive rate of chromosome aneuploidy was 5.73% (9/157), the positive rate of CNV was 6.37% (10/157), in which the positive rate of clinically significant CNV was 4.46% (7/157). There were no significant differences in the positive rate of clinically significant chromosomal variation, the positive rate of chromosome aneuploidy and the positive rate of clinically significant CNV between the two groups(P>0.05). ② The total positive rate of clinically significant CNV in the TE fetuses and the positive rate of clinically significant CNV in the isolated TE group were significantly higher than those in the low- risk pregnancy cohort, respectively (P<0.05). There was no significant difference in the positive rate of clinically significant CNV between the complex TE group and the low- risk pregnancy cohort (P>0.05). Conclusions: The risk of clinically significant CNV in the TE fetuses is significantly higher than that in the low-risk pregnancy population. CMA can improve the detection rate of CNV in the fetuses with TE by about 6% (10/157), while CMA has important clinical value in detecting chromosomal microdeletion/microduplication in the TE fetus.

Key words: Talipes equinovarus, Fetus, Chromosomes, DNA copy number variations, Aneuploidy, Prenatal diagnosis, Ultrasonography, Chromosome microarray analysis