检验医学 ›› 2026, Vol. 41 ›› Issue (2): 106-111.DOI: 10.3969/j.issn.1673-8640.2026.02.002

• 遗传性疾病精准检测与诊断专题 • 上一篇    下一篇

19例染色体22q11.2区域拷贝数异常胎儿遗传学分析及其母体妊娠结局

马姗姗, 章荣, 尹婷, 郑安舜, 王志伟, 王永安, 王雷雷()   

  1. 连云港市妇幼保健院中心实验室江苏 连云港 222000
  • 收稿日期:2025-02-14 修回日期:2025-07-01 出版日期:2026-02-28 发布日期:2026-03-06
  • 通讯作者: 王雷雷,E-mail:wangleileiok@qq.com
  • 作者简介:马姗姗,女,1996年生,硕士,助理研究员,主要从事产前筛查和遗传学诊断工作。
  • 基金资助:
    连云港市重点研发计划(社会发展)项目(SF2317)

Genetic analysis and pregnancy outcomes of 19 fetuses with abnormal copy number in 22q11.2 region of chromosome

MA Shanshan, ZHANG Rong, YIN Ting, ZHENG Anshun, WANG Zhiwei, WANG Yongan, WANG Leilei()   

  1. Lianyungang Maternal and Child Health Care HospitalLianyungang 222000,Jiangsu, China
  • Received:2025-02-14 Revised:2025-07-01 Online:2026-02-28 Published:2026-03-06

摘要:

目的 探讨22号染色体长臂1区1带第2亚带(22q11.2)微缺失和微重复与临床表型之间的关系,为临床遗传咨询提供依据。方法 选取2015年1月—2023年5月连云港市妇幼保健院采用染色体微阵列分析(CMA)技术检出22q11.2微缺失、微重复的孕妇19例,对其临床表型、妊娠结局和致病基因进行分析。对19例孕妇的活产儿进行随访。结果 19例孕妇中,22q11.2微缺失8例、微重复11例,涉及的主要致病基因为TBX1和CRKL。8例22q11.2微缺失孕妇中,有5例胎儿心脏发育异常;11例22q11.2微重复孕妇胎儿均未发现心脏相关异常。8例检出22q11.2微缺失的孕妇中,有5例终止妊娠,2例自然流产,1例顺利分娩(活产儿随访结束时为6月龄,表型未见明显异常)。11例检出22q11.2微重复的孕妇中,4例终止妊娠,7例顺利分娩(1例男性活产儿随访结束时为4岁,囟门闭合较晚;其他6例活产儿随访结束时表型均未 见明显异常)。结论 与22q11.2微重复相比,22q11.2微缺失患者会表现出更广泛的临床表型,并与先天性心脏缺陷(CHD)关联更强。

关键词: 22q11.2微缺失, 22q11.21微重复, 遗传学分析, 染色体微阵列分析, 妊娠结局

Abstract:

Objective To investigate the relationship between 22q11.2 microdeletions and microduplications and clinical phenotypes,and to provide a reference for clinical genetic counseling. Methods From January 2015 to May 2023,19 patients diagnosed with 22q11.2 microdeletions and microduplications by chromosomal microarray analysis(CMA) at Lianyungang Maternal and Child Health Care Hospital were enrolled. The clinical phenotypes,pregnancy follow-up outcomes and pathogenic genes of these patients were analyzed. The follow-up for live-born newborns of 19 pregnant women was conducted. Results Among the 19 pregnant women,8 cases had 22q11.2 microdeletions,and 11 cases had microduplications. The main pathogenic genes involved were TBX1 and CRKL. Among the 8 pregnant women with 22q11.2 microdeletions,5 fetuses had abnormal heart development. Among the 11 pregnant women with 22q11.2 microduplications,no heart-related abnormalities were found. Among the 8 pregnant women with 22q11.2 microdeletions,5 cases terminated the pregnancy,2 cases had spontaneous abortions,and 1 case had a birth(at the time of the follow-up,the newborn was 6 months old,and no obvious abnormalities were observed in the phenotype). Among the 11 pregnant women with 22q11.2 microduplications,4 cases terminated the pregnancy,and 7 cases had births(a 4-year-old boy with delayed fontanel closure,the phenotypes of the other 6 cases were not significantly abnormal at the time of the follow-up). Conclusions Compared with microduplications,microdeletions show a wider range of clinical phenotypes and a stronger association with congenital heart defects(CHD).

Key words: 22Q11.2 microdeletion, 22Q11.2 microduplication, Genetic analysis, Chromosome microarray, Pregnancy outcome

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