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对9p和18p同时发生的三等性三发症的表型和基因型见解

Carter A Wright¹, Angela E Scheuerle^1,2, Kathleen Wilson¹

¹Department of Pathology, UT Southwestern Medical Center, Dallas, TX, 75390, USA.

Molecular cytogenetics

|February 9, 2025

概括

这项研究报告了第一个有两个兄弟姐妹的家庭,由于母亲平衡转位,他们同时经历了部分三发症9p和18p. 这种遗传失衡导致严重的先天性异常,突出显示了与介质分离相关的风险.

科学领域:

遗传学遗传学是一个
人类遗传学人类遗传学
生殖遗传学生殖遗传学

背景情况:

均衡的相互转移可以导致表型正常的载体,增加异位性子细胞不平衡的风险.
转位载体中的 meiotic 分离错误可能导致染色体异常的胚胎.
这项研究调查了一家患有与母体转位相关的复发性先天性异常的家庭.

研究的目的:

在兄弟姐妹中报告第一个同时发生的部分三发症9p和18p的病例.
描述相关的表型和遗传机制.
强调染色体微阵列分析 (CMA) 在诊断这些疾病中的实用性.

主要方法:

在受影响的兄弟姐妹和母亲身上进行了型化和染色体微阵列分析 (CMA).
进行了详细的细胞遗传和分子分析,以确定染色体异常.
记录了受影响兄弟姐妹的表型特征.

主要成果:

两个兄弟姐妹继承了9p和18p的部分三发症,这是由于母亲的平衡转位t
兄弟1呈现严重的先天性异常,兄弟2呈现多种异常,包括异形特征和器官缺陷.
CMA精确地确定了9p和18p的细分重复,证实了3:1介质分离事件.

结论:

这是第一份关于同一家庭中的兄弟姐妹同时出现9p和18p部分三发症的报告.
这些发现强调了这些特定的染色体拷贝数增加的表型影响.
建议家人进行产前诊断和辅助生殖技术,以减轻未来怀孕的风险.

关键词:

在CMA分析中.同时出现的三发症9p和18p.家庭t(9;18)(q13;p11.2) 的情况.

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