吉林大学学报(医学版) ›› 2024, Vol. 50 ›› Issue (1): 260-264.doi: 10.13481/j.1671-587X.20240132

• 临床医学 • 上一篇    

嵌合型Y染色体等臂双着丝粒致胎儿主动脉狭窄1例报告及文献复习

全宇璐1,2,张萍萍2,罗艳2,霍竞2,余小平2,孙艳美2(),李亚丽2()   

  1. 1.河北北方学院研究生院,河北 张家口 075000
    2.河北省人民医院生殖遗传科,河北 石家庄 050051
  • 收稿日期:2022-10-18 出版日期:2024-01-28 发布日期:2024-01-31
  • 通讯作者: 孙艳美,李亚丽 E-mail:lsunyanmei1986 @163.com;lyl8703@sina.com
  • 作者简介:全宇璐(1994-),女,河北省张家口市人,住院医师,医学硕士,主要从事生殖遗传学方面的研究。
  • 基金资助:
    河北省科技厅项目(22377792D)

Aortic stenosis of fetus caused by chimeric Y-chromosome isobaric double-adherent granules:A case report and literature review

Yulu QUAN1,2,Pingping ZHANG2,Yan LUO2,Jing HUO2,Xiaoping YU2,Yanmei SUN2(),Yali LI2()   

  1. 1.Graduate School,Hebei North University,Zhangjiakou 075000,China
    2.Department of Reproductive and Genetics,People’s Hospital,Hebei Province,Shijiazhuang 050051,China
  • Received:2022-10-18 Online:2024-01-28 Published:2024-01-31
  • Contact: Yanmei SUN,Yali LI E-mail:lsunyanmei1986 @163.com;lyl8703@sina.com

摘要:

目的 通过对先天性主动脉狭窄(AS)胎儿产前诊断结果进行遗传学分析,明确其可能的致病原因。 方法 1例孕25周孕妇,因“胎儿AS”行羊膜腔穿刺术采集羊水,行染色体G显带核型分析联合单核苷酸多态性微阵列(SNP-array)检测。同时采集胎儿父母外周血,行染色体核型分析。 结果 胎儿核型分析,为嵌合型Y染色体等臂双着丝粒;SNP-array分析,胎儿染色体Yp11.31q11.21区段存在11.2 Mb片段的重复,同时Yq11.21q11.23区段存在14.8 Mb片段的缺失。胎儿父母均为正常核型,考虑其为新发变异。经充分遗传咨询后,孕妇及家属选择回当地引产。 结论 嵌合型Y染色体等臂双着丝粒的染色体核型可能是男性胎儿表型为AS的原因,羊水细胞染色体核型分析联合SNP-array检测有助于该病的早期诊断。

关键词: 胎儿, 先天性心脏病, 主动脉狭窄, 产前诊断, 嵌合型Y染色体等臂双着丝粒

Abstract:

Objective To confirm the potential etiological factors of congenital aortic stenosis (AS) by genetic analysis on prenatal diagnostic results of the fetus with AS. Methods Amniocentesis for chromosomal G-band karyotyping combinated with single nucleotide polymorphism array (SNP-array) analysis was conducted on the amniotic fluid collected from a 25-week pregnant woman diagnosed as “fetus AS”; chromosome karyotyping was also performed on the peripheral blood of the fetal parents. Results The fetal karyotype analysis showed a chimeric Y-chromosome isobaric double-adherent granules. The SNP-array analysis results revealed a 11.2 Mb duplication in the Yp11.31q11.21 region and a 14.8 Mb deletion in the Yq11.21q11.23 region. Both the parents presented a normal karyotype, suggesting it was a newfound mutation. After extensive genetic counseling, the pregnant woman and her family chose to terminate the pregnancy locally. Conclusion The chromosomal karyotype of the chimeric Y-chromosome isobaric double-adherent granules may be a contributing factor to the AS phenotype in the male fetus. The combined use of chromosomal karyotyping and SNP-array analysis on the amniotic cells is instrumental in the early diagnosis of the disease.

Key words: Fetus, Congenital heart disease, Aortic stenosis, Prenatal diagnosis, Chimeric Y-chromosome isobaric double-adherent granules

中图分类号: 

  • R714.53