由于父亲的马赛克主义,CCHS相关的PHOX2B多氨酸扩张变异的复发
Huling Jiang1, Zepeng Ping1, Suping Li1
1Department of Prenatal Diagnosis Center, Maternity and Child Health Care Affiliated Hospital, Jiaxing University, Jiaxing 314000, China.
Gene
|March 11, 2024
概括
先天性中央低通风综合征 (CCHS) 可能是PHOX2B基因变异的结果. 即使是未受影响的父母也可能表现出生殖线马赛克主义,影响遗传咨询和产前检测,以便在未来怀孕.
科学领域:
- 遗传学 是一个遗传学.
- 儿科 儿科 儿科
- 呼吸系统医学 呼吸系统医学
背景情况:
- 先天性中央低通风综合征 (CCHS) 是一种罕见的遗传疾病,影响呼吸控制.
- 结合式Homeobox 2B (PHOX2B) 基因被确定为CCHS的主要原因.
- CCHS导致呼吸障碍,特别是在睡眠期间.
研究的目的:
- 为了调查一个家庭的重复严重的CCHS.
- 确认家族中导致CCHS的遗传变异.
- 评估父母的马赛克主义潜力,并进行产前诊断.
主要方法:
- 整体外体测序 (WES) 用于识别遗传变异.
- 桑格测序和滴滴数字PCR (ddPCR) 用于变体确认.
- 产前诊断是在试验对象的母亲在她的第四个怀孕期间进行的.
主要成果:
- 试验对象和她的兄弟携带了PHOX2B聚氨酸扩张变体 (c.744_758dupCGCGGCAGCGGCGGCGGCGGC).
- 父亲显示出PHOX2B变种的生殖系马赛克 (14.3%) 的证据.
- 在产前诊断期间测试的胎儿对p.(Ala241[26]) 变种呈阴性.
结论:
- 这项研究强调了在没有CCHS症状的父母中生殖线马赛克主义的可能性.
- 这些发现强调了对CCHS家庭进行综合遗传咨询的重要性.
- 产前检测对于潜在的父母马赛克主义家庭的后续怀孕至关重要.
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